Redis集群管理

最新推荐文章于 2024-03-12 22:49:12 发布

xueling022

最新推荐文章于 2024-03-12 22:49:12 发布

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分类专栏： redis

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原文链接：http://blog.youkuaiyun.com/xyang81/article/details/51895011

在上一篇《Redis3.2集群担建与验证》文章中分享了集群的详细担建过程，本篇主要分享集群管理的常见操作，如：添加节点、删除节点、slot分配。如果你还没有担建集群环境，建议先看上篇《Redis3.2集群担建与验证》过程，再来阅读本文比较好理解。

1、集群管理常用命令

<code class="hljs r has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">// 集群(cluster)  
CLUSTER INFO                                打印集群的状态信息  
CLUSTER NODES                               列出集群当前已知的所有节点（node），以及这些节点的相关信息 

// 节点(node)  
CLUSTER MEET <ip> <port>                    将ip和port所指定的节点添加到集群当中，让它成为集群的一份子
CLUSTER FORGET <node_id>                    从集群中移除node_id指定的节点
CLUSTER REPLICATE <node_id>                 将当前节点设置为node_id指定节点的从节点
CLUSTER SAVECONFIG                          将当前节点的配置信息手动保存到硬盘（nodes-port.conf） 
CLUSTER SLAVES <master_node_id>             查询指定的master_node_id主节点有哪些从（slave）节点

// 槽(slot)  
CLUSTER ADDSLOTS <slot> [slot <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">...</span>]          将一个或多个槽（slot）指派（assign）给当前节点
CLUSTER DELSLOTS <slot> [slot <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">...</span>]          将一个或多个槽从当前节点移除
CLUSTER FLUSHSLOTS                          移除指派给当前节点的所有槽，让当前节点变成一个没有指派任何槽的节点
CLUSTER SETSLOT <slot> NODE <node_id>       将当前节点指定的槽（slot）指派给node_id指定的节点，如果槽已经指派给另一个节点，那么先让另一个节点删除该槽，然后再进行指派
CLUSTER SETSLOT <slot> MIGRATING <node_id>  将当前节点指定的槽（slot）迁移到node_id指定的节点中
CLUSTER SETSLOT <slot> IMPORTING <node_id>  从node_id指定节点中的槽（slot）导入到当前节点
CLUSTER SETSLOT <slot> STABLE               取消对当前节点指定槽（slot）的导入（import）或者迁移（migrate）
CLUSTER SLOTS                               查看槽（slot）在集群中的分配情况

// 键 (key)  
CLUSTER KEYSLOT <key>                       计算键key应该被分配在哪个槽上  
CLUSTER COUNTKEYSINSLOT <slot>              返回指定槽（slot）保存key的数量  
CLUSTER GETKEYSINSLOT <slot> <count>        获取指定槽（slot）中count个key，如果指定槽中大于count个key，则只返回前cout个key，小于或为空，则返回最多数量的key </code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li><li style="box-sizing: border-box; padding: 0px 5px;">23</li><li style="box-sizing: border-box; padding: 0px 5px;">24</li><li style="box-sizing: border-box; padding: 0px 5px;">25</li></ul>

以上命令是集群特有的，必须登录到Redis集群才能使用。注释中提到的当前节点，指登录到集群中指定的节点。如：redis-cli -h 192.168.0.201 -p 6379，当前登录的节点就是192.168.0.201:6379。
更多集群管理命令请参考官网：http://redis.io/commands/cluster-addslots

<code class="hljs css has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">shell</span>> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">redis-cli</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-c</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-h</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-p</span> 6379
127<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.1</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6379</span>> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">cluster</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">nodes</span>
459<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">dbcccc1e5be021f19efde794b9e84474c0c02</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16379</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b6814c717080de33907e6f769e1fd8dc4fe53c38</span> 0 1468339459776 11 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>
06023<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f8283389ad5580c782797f49a5996c108b3</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6379</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">myself</span>,<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 0 10 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 500<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-11255</span>
91179<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b96d9b8abce85fa7a5748aa9b4114f0b260</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16380</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> 06023<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f8283389ad5580c782797f49a5996c108b3</span> 0 1468339462797 10 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>
<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">ef8a49e5242c791551f1b317d5039144e38acde6</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6380</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> 13567<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f6f8787d3aa3f4ef3abd15c2cc500a1469b</span> 0 1468339466819 8 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>
<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b6814c717080de33907e6f769e1fd8dc4fe53c38</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6381</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 1468339465813 11 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 0<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-499</span>
13567<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f6f8787d3aa3f4ef3abd15c2cc500a1469b</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16381</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 1468339463802 8 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 11256<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-16383</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li></ul>

2、添加节点

添加一对（一主一从）新的节点加入到集群当中：192.168.0.201:6382（Master）和192.168.0.201:6383（Slave），文中简称201:6381和201:16382。节点添加方式请参考《Redis3.2集群担建与验证》

1> 添加master节点

<code class="hljs css has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">shell</span>> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">redis-trib</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.rb</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">add-node</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6382</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6379</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

参数说明：
192.168.0.201:6382：新节点
192.168.0.201:6379：可以是集群中的任意一个节点（这里以201:6379为例）

注意：
1> 新的节点必须开启了集群配置
2> 新的节点必须已启动
如果不同时满足以上两点，将无法加入到集群中。成功加入集群后，会打印如下信息：
添加新的master节点

2> 为master节点分配slot

当往Redis集群中存储一份数据时，redis根据key的hash值对16384（slot）取模，算出负责指定slot范围内的某个节点来存储这个key。集群在第一次创建的时候，会给每个master节点在16384个slot中平均分配相应的slot数量，而后面新加入的master节点默认是不会分配slot的。所以我们需要手动为新加入的节点分配一定范围的slot，以便集群在存取数据的时候，能够找到这个新加入的节点。

<code class="hljs r has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">[root@localhost redis-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">3.2</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"># redis-cli cluster nodes</span>
901cade1bc2703ef2bb4ff49466b38762346755d <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6382</span> master - <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1468324422110</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span> connected
06023f8283389ad5580c782797f49a5996c108b3 <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6379</span> myself,master - <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span> connected <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5460</span>
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">...</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>

sloat范围显示在节点状态（connected）后边，从上可以看出，新加入的节点201:6382是没有分配slot的，所以为空。而为201:6379节点分配了0-5460范围的slot。
为新节点分配slot的原理是从其它主节点中负责的slot中，各移出一部份
slot给新的节点。下面为201:6382分配slot：

<code class="hljs css has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">shell</span>> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">redis-trib</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.rb</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">reshard</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6382</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

为新master节点分配slot过程
注意上图中红框部份：
1> 1000 ：为新的master节点分配1000个slot
2> 901cade1bc2703ef2bb4ff49466b38762346755d：接收1000个slot的master节点ID
3> 选择从哪些主节点移动slot到新加入的主节点中：
* all：表示从集群中所有master节点中各移动一部份slot，凑够1000个slot为止
* 选择输入一个或多个master的node_id来从中移动，最后输入done完成选择
4> yes：执行slot移动操作，输入no表示终止操作。
下面看下新的集群节点及slot分布情况：

<code class="hljs css has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-attr_selector" style="color: rgb(0, 136, 0); box-sizing: border-box;">[root@localhost redis-3.2.0]</span># <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">redis-cli</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">cluster</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">nodes</span>
901<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">cade1bc2703ef2bb4ff49466b38762346755d</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6382</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 1468325773988 9 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 0<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-332</span> 5461<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-5794</span> 10923<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-11255</span>
459<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">dbcccc1e5be021f19efde794b9e84474c0c02</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16379</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b6814c717080de33907e6f769e1fd8dc4fe53c38</span> 0 1468325769968 7 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>
06023<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f8283389ad5580c782797f49a5996c108b3</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6379</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">myself</span>,<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 0 1 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 333<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-5460</span>
91179<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b96d9b8abce85fa7a5748aa9b4114f0b260</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16380</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> 06023<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f8283389ad5580c782797f49a5996c108b3</span> 0 1468325775495 5 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>
<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">ef8a49e5242c791551f1b317d5039144e38acde6</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6380</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> 13567<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f6f8787d3aa3f4ef3abd15c2cc500a1469b</span> 0 1468325772982 8 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>
<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b6814c717080de33907e6f769e1fd8dc4fe53c38</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6381</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 1468325771976 7 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 5795<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-10922</span>
13567<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f6f8787d3aa3f4ef3abd15c2cc500a1469b</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16381</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 1468325774992 8 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 11256<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-16383</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li></ul>

已经成功为201:6382节点分配了0-332、5461-5794、10923-11255范围的slot，可以看出redis从其它三个master节点中均匀的移动了一部份slot到201:6382中。

3> 添加slave节点

下面为201:6382 master节点添加一个slave节点201:6383

<code class="hljs livecodeserver has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">shell</span>> redis-trib.rb <span class="hljs-built_in" style="color: rgb(102, 0, 102); box-sizing: border-box;">add</span>-node <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">--slave --master-id 901cade1bc2703ef2bb4ff49466b38762346755d 192.168.0.201:6383 192.168.0.201:6379</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

参数说明：
1> –slave：表示添加从节点
2> –master-id：master节点ID，这里用上边新添加的主节点ID（201:6382）
3> 192.168.0.201:6383：新slave节点的IP和端口
4> 192.168.0.201:6379：集群中任意旧节点，只要能连上就可以。这里以201:6379为例

添加slave节点成功后集群中的节点状态：

<code class="hljs css has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;"><span class="hljs-attr_selector" style="color: rgb(0, 136, 0); box-sizing: border-box;">[root@localhost redis-3.2.0]</span># <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">redis-cli</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">cluster</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">nodes</span>
901<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">cade1bc2703ef2bb4ff49466b38762346755d</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6382</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 1468333842665 9 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 0<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-332</span> 5461<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-5794</span> 10923<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-11255</span>
459<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">dbcccc1e5be021f19efde794b9e84474c0c02</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16379</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b6814c717080de33907e6f769e1fd8dc4fe53c38</span> 0 1468333841661 7 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>
9080<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">c5049615730c66731b54cb084999009eeb52</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6383</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> 901<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">cade1bc2703ef2bb4ff49466b38762346755d</span> 0 1468333843669 9 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>
06023<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f8283389ad5580c782797f49a5996c108b3</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6379</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">myself</span>,<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 0 1 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 333<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-5460</span>
91179<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b96d9b8abce85fa7a5748aa9b4114f0b260</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16380</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> 06023<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f8283389ad5580c782797f49a5996c108b3</span> 0 1468333844674 5 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>
<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">ef8a49e5242c791551f1b317d5039144e38acde6</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6380</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> 13567<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f6f8787d3aa3f4ef3abd15c2cc500a1469b</span> 0 1468333842665 8 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>
<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b6814c717080de33907e6f769e1fd8dc4fe53c38</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6381</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 1468333845678 7 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 5795<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-10922</span>
13567<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f6f8787d3aa3f4ef3abd15c2cc500a1469b</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16381</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">master</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-</span> 0 1468333846685 8 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span> 11256<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">-16383</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li></ul>

very good~ 可以看出，201:6383以成功添加为一个slave节点，并将201:6382作为master节点。

cluster nodes命令列表的节点状态信息说明：

<code class="hljs css has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">459<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">dbcccc1e5be021f19efde794b9e84474c0c02</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16379</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b6814c717080de33907e6f769e1fd8dc4fe53c38</span> 0 1468333841661 7 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span></code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li></ul>

1> 459dbcccc1e5be021f19efde794b9e84474c0c02 ：节点ID
2> 192.168.0.202:16379：节点IP和端口
3> slave：节点类型，master、slave或myself(master/slave)
4> b6814c717080de33907e6f769e1fd8dc4fe53c38 ：master节点ID，如果自己是master节点，这一列的值为0
5> 0：集群最近一次向节点发送 PING 命令之后，过去了多长时间还没接到回复。
6> 1468333841661：节点最近一次返回 PONG 回复的时间
7> 7：节点的配置纪元
8> connected：节点网络连接状态
9> 如果是主节点，节点状态后边显示slot分配的范围

3、改变slave节点的master

将上边新加的slave节点（201:6383）的master，修改为201:6379（06023f8283389ad5580c782797f49a5996c108b3）

<code class="hljs lasso has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">shell<span class="hljs-subst" style="color: rgb(0, 0, 0); box-sizing: border-box;">></span> redis<span class="hljs-attribute" style="box-sizing: border-box;">-cli</span> <span class="hljs-attribute" style="box-sizing: border-box;">-h</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span> <span class="hljs-attribute" style="box-sizing: border-box;">-p</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6383</span> cluster nodes <span class="hljs-subst" style="color: rgb(0, 0, 0); box-sizing: border-box;">|</span> grep myself
<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">9080</span>c5049615730c66731b54cb084999009eeb52 <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6383</span> myself,slave <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">901</span>cade1bc2703ef2bb4ff49466b38762346755d <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span> connected</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li></ul>

当前slave节点201:6383的master节点是901cade1bc2703ef2bb4ff49466b38762346755d

<code class="hljs lasso has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">shell<span class="hljs-subst" style="color: rgb(0, 0, 0); box-sizing: border-box;">></span> redis<span class="hljs-attribute" style="box-sizing: border-box;">-cli</span> <span class="hljs-attribute" style="box-sizing: border-box;">-h</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span> <span class="hljs-attribute" style="box-sizing: border-box;">-p</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6383</span>
<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6383</span><span class="hljs-subst" style="color: rgb(0, 0, 0); box-sizing: border-box;">></span> cluster replicate <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">06023</span>f8283389ad5580c782797f49a5996c108b3</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li></ul>

06023f8283389ad5580c782797f49a5996c108b3：新master节点的ID

<code class="hljs css has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6383</span>> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">CLUSTER</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">SLAVES</span> 06023<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f8283389ad5580c782797f49a5996c108b3</span>
1) "91179<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">b96d9b8abce85fa7a5748aa9b4114f0b260</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.202</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:16380</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> 06023<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f8283389ad5580c782797f49a5996c108b3</span> 0 1468336124600 1 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>"
2) "9080<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">c5049615730c66731b54cb084999009eeb52</span> 192<span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.168</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.0</span><span class="hljs-class" style="box-sizing: border-box; color: rgb(155, 112, 63);">.201</span><span class="hljs-pseudo" style="color: rgb(0, 0, 0); box-sizing: border-box;">:6383</span> <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">myself</span>,<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">slave</span> 06023<span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">f8283389ad5580c782797f49a5996c108b3</span> 0 0 0 <span class="hljs-tag" style="color: rgb(0, 0, 0); box-sizing: border-box;">connected</span>"</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul>

可以看出201:6383 slave节点已经是201:6379 master节点的子节点了。

4、删除节点

1> 删除slave节点

<code class="hljs python has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">[root<span class="hljs-decorator" style="color: rgb(0, 102, 102); box-sizing: border-box;">@localhost redis-3.2.0]# redis-trib.rb del-node 192.168.0.201:6383 9080c5049615730c66731b54cb084999009eeb52</span>
<span class="hljs-prompt" style="color: rgb(0, 102, 102); box-sizing: border-box;">>>> </span>Removing node <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">9080</span>c5049615730c66731b54cb084999009eeb52 <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">from</span> cluster <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6383</span>
<span class="hljs-prompt" style="color: rgb(0, 102, 102); box-sizing: border-box;">>>> </span>Sending CLUSTER FORGET messages to the cluster...
<span class="hljs-prompt" style="color: rgb(0, 102, 102); box-sizing: border-box;">>>> </span>SHUTDOWN the node.</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>

参数说明：
1> del-node：删除节点参数
2> 192.168.0.201:6383：节点IP和端口
3> 9080c5049615730c66731b54cb084999009eeb52：节点ID
节点成功删除后，会同时将进程杀死

从节点重新恢复后，先cluster meet ip port将从节点加入集群，然后设置自己的mastercluster replication master_node_id

2、删除master节点

注意：
1> 如果master节点有slot，必须先将所有slot分配给其它master节点。否则会提示你先将slot移除再尝试删除，如下所示：

<code class="hljs python has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">shell> redis-trib.rb <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">del</span>-node <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6382</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">901</span>cade1bc2703ef2bb4ff49466b38762346755d
<span class="hljs-prompt" style="color: rgb(0, 102, 102); box-sizing: border-box;">>>> </span>Removing node <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">901</span>cade1bc2703ef2bb4ff49466b38762346755d <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">from</span> cluster <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6382</span>
[ERR] Node <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6382</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">is</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">not</span> empty! Reshard data away <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">and</span> <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">try</span> again.</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li></ul>

2> 如果master节点有slave节点，先将slave节点移到其它master下

移除201:6382 master节点的slot

<code class="hljs r has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">[root@localhost redis-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">3.2</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span>]<span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"># redis-trib.rb reshard 192.168.0.201:6382</span>
>>> Performing Cluster Check (using node <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6382</span>)
M: 901cade1bc2703ef2bb4ff49466b38762346755d <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6382</span>
   slots:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">0</span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">332</span>,<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5461</span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5794</span>,<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">10923</span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">11255</span> (<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1000</span> slots) master
   <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span> additional replica(s)
M: 06023f8283389ad5580c782797f49a5996c108b3 <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6379</span>
   slots:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">333</span>-<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5460</span> (<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">5128</span> slots) master
   <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span> additional replica(s)
<span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">...</span>
[OK] All nodes agree about slots configuration.
>>> Check <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">for</span> open slots...
>>> Check slots coverage...
[OK] All <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">16384</span> slots covered.
How many slots do you want to move (from <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1</span> to <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">16384</span>)? <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">1000</span> <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"># 201:6382一共1000个slot</span>
What is the receiving node ID? 06023f8283389ad5580c782797f49a5996c108b3 <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;"># 接收这1000个slot的节点ID</span>
Please enter all the <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">source</span> node IDs.
  Type <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'all'</span> to use all the nodes as <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">source</span> nodes <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">for</span> the hash slots.
  Type <span class="hljs-string" style="color: rgb(0, 136, 0); box-sizing: border-box;">'done'</span> once you entered all the <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">source</span> nodes IDs.
Source node <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">#1:901cade1bc2703ef2bb4ff49466b38762346755d # 移除这1000个slot的master节点ID（这里同样是201:6382）</span>
Source node <span class="hljs-comment" style="color: rgb(136, 0, 0); box-sizing: border-box;">#2:done</span>
....
Do you want to proceed with the proposed reshard plan (yes/no)? yes</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li><li style="box-sizing: border-box; padding: 0px 5px;">5</li><li style="box-sizing: border-box; padding: 0px 5px;">6</li><li style="box-sizing: border-box; padding: 0px 5px;">7</li><li style="box-sizing: border-box; padding: 0px 5px;">8</li><li style="box-sizing: border-box; padding: 0px 5px;">9</li><li style="box-sizing: border-box; padding: 0px 5px;">10</li><li style="box-sizing: border-box; padding: 0px 5px;">11</li><li style="box-sizing: border-box; padding: 0px 5px;">12</li><li style="box-sizing: border-box; padding: 0px 5px;">13</li><li style="box-sizing: border-box; padding: 0px 5px;">14</li><li style="box-sizing: border-box; padding: 0px 5px;">15</li><li style="box-sizing: border-box; padding: 0px 5px;">16</li><li style="box-sizing: border-box; padding: 0px 5px;">17</li><li style="box-sizing: border-box; padding: 0px 5px;">18</li><li style="box-sizing: border-box; padding: 0px 5px;">19</li><li style="box-sizing: border-box; padding: 0px 5px;">20</li><li style="box-sizing: border-box; padding: 0px 5px;">21</li><li style="box-sizing: border-box; padding: 0px 5px;">22</li></ul>

新增master节点后，也进行了这一步操作，当时是分配，现在是去掉，反着的。

删除master节点

<code class="hljs python has-numbering" style="display: block; padding: 0px; color: inherit; box-sizing: border-box; font-family: 'Source Code Pro', monospace;font-size:undefined; white-space: pre; border-radius: 0px; word-wrap: normal; background: transparent;">shell> redis-trib.rb <span class="hljs-keyword" style="color: rgb(0, 0, 136); box-sizing: border-box;">del</span>-node <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6382</span> <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">901</span>cade1bc2703ef2bb4ff49466b38762346755d
<span class="hljs-prompt" style="color: rgb(0, 102, 102); box-sizing: border-box;">>>> </span>Removing node <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">901</span>cade1bc2703ef2bb4ff49466b38762346755dfrom cluster <span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">192.168</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.0</span><span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">.201</span>:<span class="hljs-number" style="color: rgb(0, 102, 102); box-sizing: border-box;">6382</span>
<span class="hljs-prompt" style="color: rgb(0, 102, 102); box-sizing: border-box;">>>> </span>Sending CLUSTER FORGET messages to the cluster...
<span class="hljs-prompt" style="color: rgb(0, 102, 102); box-sizing: border-box;">>>> </span>SHUTDOWN the node.</code><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul><ul class="pre-numbering" style="box-sizing: border-box; position: absolute; width: 50px; top: 0px; left: 0px; margin: 0px; padding: 6px 0px 40px; border-right-width: 1px; border-right-style: solid; border-right-color: rgb(221, 221, 221); list-style: none; text-align: right; background-color: rgb(238, 238, 238);"><li style="box-sizing: border-box; padding: 0px 5px;">1</li><li style="box-sizing: border-box; padding: 0px 5px;">2</li><li style="box-sizing: border-box; padding: 0px 5px;">3</li><li style="box-sizing: border-box; padding: 0px 5px;">4</li></ul>

此时新的master节点也被删除了，回到了添加节点之前的状态。