Elasticsearch进阶之路:集群部署

Elasticsearch进阶之路:集群部署

安装环境：

centos 6.8
master1.bigdata
master1.bigdata
slave1.bigdata
slave2.bigdata
slave3.bigdata

elasticsearch version 5.2.1

1、创建用户

useradd elasticsearch
passwd elasticsearch

2、创建安装目录

cd /usr/local
mkdir elasticsearch

3、下载上传安装包到服务器

https://www.elastic.co/downloads/past-releases/elasticsearch-5-2-1

4、解压

tar -xzvf elasticsearch-5.2.1.tar.gz

5、授权

chown -R elasticsearch:elasticsearch elasticsearch/

6、修改配置

vim config/elasticsearch.yml

配置

cluster.name: elasticsearch-dev
node.name: ${HOSTNAME}
network.host: 主机ip
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
http.port: 9200
discovery.zen.ping.unicast.hosts: ["172.20.86.22", "172.20.86.25", "172.20.86.27", "172.20.86.28", "172.20.86.29"]

7、启动

./bin/elasticsearch -d -d 为后台启动

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异常处理：

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问题一、can not run elasticsearch as root

解决：不能以root用户启动
切换用户启动
su elasticsearhc

问题二、java.lang.UnsupportedOperationException

java.lang.UnsupportedOperationException: seccomp unavailable: CONFIG_SECCOMP not compiled into kernel, CONFIG_SECCOMP and CONFIG_SECCOMP_FILTER are needed
解决：centos版本问题
修改es配置
vim config/elasticsearch.yml
增加
bootstrap.memory_lock: false
bootstrap.system_call_filter: false

问题三：ERROR: bootstrap checks failed

max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
max number of threads [1024] for user [lishang] likely too low, increase to at least [2048]
解决：切换到root用户，编辑limits.conf 添加类似如下内容
vi /etc/security/limits.conf
添加如下内容:

• soft nofile 65536
• hard nofile 131072
• soft nproc 2048
• hard nproc 4096

问题四：max number of threads [1024] for user [lish] likely too low, increase to at least [2048]

解决：切换到root用户，进入limits.d目录下修改配置文件。
vi /etc/security/limits.d/90-nproc.conf
修改如下内容：

• soft nproc 1024
  #修改为
• soft nproc 65535

问题五：max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]

解决：切换到root用户修改配置sysctl.conf
vi /etc/sysctl.conf
添加下面配置：
vm.max_map_count=655360
并执行命令：
sysctl -p

问题六：max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]

解决：修改切换到root用户修改配置limits.conf 添加下面两行
命令:vi /etc/security/limits.conf

•    hard    nofile           65536
  

•    soft    nofile           65536
  

切换到es的用户。

然后，重新启动elasticsearch，即可启动成功。

遇到的坑
新增节点时，需要清除data/nodes数据，否则加入不了集群

rm -rf data/nodes

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参考：《Elasticsearch 权威指南》中文版