Mongo副本集搭建

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原创最新推荐文章于 2026-03-04 15:53:36 发布 346 阅读 AI 写同款· GEO 优化 ›

docker搭建mongo单机单节点副本集模式现有如下问题：后续解答这两个问题。阅读详情

配置

#指定data目录
mkdir /usr/local/mongodb/primary /usr/local/mongodb/secondary /usr/local/mongodb/arbiter
#启动三节点
mongod --replSet demo --dbpath /usr/local/mongodb/primary --port 40000
mongod --replSet demo --dbpath /usr/local/mongodb/secondary --port 40001
mongod --replSet demo --dbpath /usr/local/mongodb/arbiter --port 40002


#PRIMARY 节点
mongo --port 40000
use admin
> use admin
switched to db admin
> rs.status()
{
	"info" : "run rs.initiate(...) if not yet done for the set",
	"ok" : 0,
	"errmsg" : "no replset config has been received",
	"code" : 94
}

> config = {
"_id": "demo",
"members": [
{"_id": 0, "host": "127.0.0.1:40000"},
{"_id": 1, "host": "127.0.0.1:40001"},
{"_id": 2, "host": "127.0.0.1:40002", arbiterOnly: true}
]
}
rs.initiate(config)
rs.status()
{
	"set" : "demo",
	"date" : ISODate("2019-11-28T08:28:09.517Z"),
	"myState" : 2,
	"term" : NumberLong(0),
	"heartbeatIntervalMillis" : NumberLong(2000),
	"members" : [
		{
			"_id" : 0,
			"name" : "127.0.0.1:40000",
			"health" : 1,
			"state" : 2,
			"stateStr" : "SECONDARY",
			"uptime" : 156,
			"optime" : {
				"ts" : Timestamp(1574929683, 1),
				"t" : NumberLong(-1)
			},
			"optimeDate" : ISODate("2019-11-28T08:28:03Z"),
			"infoMessage" : "could not find member to sync from",
			"configVersion" : 1,
			"self" : true
		},
		{
			"_id" : 1,
			"name" : "127.0.0.1:40001",
			"health" : 1,
			"state" : 2,
			"stateStr" : "SECONDARY",
			"uptime" : 5,
			"optime" : {
				"ts" : Timestamp(1574929683, 1),
				"t" : NumberLong(-1)
			},
			"optimeDate" : ISODate("2019-11-28T08:28:03Z"),
			"lastHeartbeat" : ISODate("2019-11-28T08:28:08.743Z"),
			"lastHeartbeatRecv" : ISODate("2019-11-28T08:28:07.735Z"),
			"pingMs" : NumberLong(1),
			"configVersion" : 1
		},
		{
			"_id" : 2,
			"name" : "127.0.0.1:40002",
			"health" : 1,
			"state" : 7,
			"stateStr" : "ARBITER",
			"uptime" : 5,
			"lastHeartbeat" : ISODate("2019-11-28T08:28:08.743Z"),
			"lastHeartbeatRecv" : ISODate("2019-11-28T08:28:05.735Z"),
			"pingMs" : NumberLong(0),
			"configVersion" : 1
		}
	],
	"ok" : 1
}

测试

mongo --port 40000
demo:PRIMARY> use test_db
demo:PRIMARY> db.user.insert({'name': 'xiaowang'})
WriteResult({ "nInserted" : 1 })


#
mongo --port 40001
demo:SECONDARY> use test_db
demo:SECONDARY> rs.slaveOk()
demo:SECONDARY> db.user.find({})
{ "_id" : ObjectId("5ddf855aa63d1aa529901865"), "name" : "xiaowang" }

故障

mongo --port 40000
demo:PRIMARY> use admin
demo:PRIMARY> db.shutdownServer()
server should be down...
#主节点关闭后 自动漂移到40001端口
demo:SECONDARY> rs.status()
{
	"set" : "demo",
	"date" : ISODate("2019-11-28T08:31:12.217Z"),
	"myState" : 1,
	"term" : NumberLong(2),
	"heartbeatIntervalMillis" : NumberLong(2000),
	"members" : [
		{
			"_id" : 0,
			"name" : "127.0.0.1:40000",
			"health" : 0,
			"state" : 8,
			"stateStr" : "(not reachable/healthy)",
			"uptime" : 0,
			"optime" : {
				"ts" : Timestamp(0, 0),
				"t" : NumberLong(-1)
			},
			"optimeDate" : ISODate("1970-01-01T00:00:00Z"),
			"lastHeartbeat" : ISODate("2019-11-28T08:31:12.117Z"),
			"lastHeartbeatRecv" : ISODate("2019-11-28T08:30:48.389Z"),
			"pingMs" : NumberLong(0),
			"lastHeartbeatMessage" : "Connection refused",
			"configVersion" : -1
		},
		{
			"_id" : 1,
			"name" : "127.0.0.1:40001",
			"health" : 1,
			"state" : 1,
			"stateStr" : "PRIMARY",
			"uptime" : 308,
			"optime" : {
				"ts" : Timestamp(1574929860, 2),
				"t" : NumberLong(2)
			},
			"optimeDate" : ISODate("2019-11-28T08:31:00Z"),
			"infoMessage" : "could not find member to sync from",
			"electionTime" : Timestamp(1574929860, 1),
			"electionDate" : ISODate("2019-11-28T08:31:00Z"),
			"configVersion" : 1,
			"self" : true
		},
		{
			"_id" : 2,
			"name" : "127.0.0.1:40002",
			"health" : 1,
			"state" : 7,
			"stateStr" : "ARBITER",
			"uptime" : 186,
			"lastHeartbeat" : ISODate("2019-11-28T08:31:12.112Z"),
			"lastHeartbeatRecv" : ISODate("2019-11-28T08:31:10.764Z"),
			"pingMs" : NumberLong(0),
			"configVersion" : 1
		}
	],
	"ok" : 1
}

恢复

 mongod --replSet demo --dbpath ./primary --port 40000
#主节重启后 节点状态变更为二次节点SECONDARY
demo:PRIMARY> rs.status()
{
	"set" : "demo",
	"date" : ISODate("2019-11-28T08:58:58.580Z"),
	"myState" : 1,
	"term" : NumberLong(2),
	"heartbeatIntervalMillis" : NumberLong(2000),
	"members" : [
		{
			"_id" : 0,
			"name" : "127.0.0.1:40000",
			"health" : 1,
			"state" : 2,
			"stateStr" : "SECONDARY",
			"uptime" : 1534,
			"optime" : {
				"ts" : Timestamp(1574929860, 2),
				"t" : NumberLong(2)
			},
			"optimeDate" : ISODate("2019-11-28T08:31:00Z"),
			"lastHeartbeat" : ISODate("2019-11-28T08:58:56.827Z"),
			"lastHeartbeatRecv" : ISODate("2019-11-28T08:58:57.583Z"),
			"pingMs" : NumberLong(0),
			"syncingTo" : "127.0.0.1:40001",
			"configVersion" : 1
		},
		{
			"_id" : 1,
			"name" : "127.0.0.1:40001",
			"health" : 1,
			"state" : 1,
			"stateStr" : "PRIMARY",
			"uptime" : 1974,
			"optime" : {
				"ts" : Timestamp(1574929860, 2),
				"t" : NumberLong(2)
			},
			"optimeDate" : ISODate("2019-11-28T08:31:00Z"),
			"electionTime" : Timestamp(1574929860, 1),
			"electionDate" : ISODate("2019-11-28T08:31:00Z"),
			"configVersion" : 1,
			"self" : true
		},
		{
			"_id" : 2,
			"name" : "127.0.0.1:40002",
			"health" : 1,
			"state" : 7,
			"stateStr" : "ARBITER",
			"uptime" : 1852,
			"lastHeartbeat" : ISODate("2019-11-28T08:58:56.689Z"),
			"lastHeartbeatRecv" : ISODate("2019-11-28T08:58:56.038Z"),
			"pingMs" : NumberLong(0),
			"configVersion" : 1
		}
	],
	"ok" : 1
}

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