版本
> db.version()
4.4.24
> 集群相关命令
rs.status()
## id 要和配置文件定义的replSetName一致
cfg={_id:"knight",members:[{_id:0,host:'182.27.239.17:27017',priority:1}]}
## id 要和配置文件定义的replSetName一致
cfg={_id:"knight",members:[{_id:0,host:'10.1.1.32:27017',priority:1},{_id:1,host:'10.1.1.33:27017',priority:0,votes:0}]}
##
cfg={_id:"knight",members:[{_id:0,host:'10.1.1.32:27017',priority:1},{_id:1,host:'10.1.1.33:27017',priority:0}]}
##
rs.initiate(cfg)
## 查看配置
rs.conf()
###
rs.reconfig(config,{force:true})
### 查看配置
rs.config()
rs.config().members参考
##
https://blog.csdn.net/GotFull/article/details/127034877
### 副本集无效
https://www.coder.work/article/544115
配置文件
systemLog:
destination: file
path: "/opt/app/mongodb_cluster/log/m27071.log"
logAppend: true
processManagement:
fork: true
pidFilePath: "/opt/app/mongodb_cluster/pid/m27071.pid"
net:
port: 27017
bindIp: 0.0.0.0
# http:
# enabled: true
# RESTInterfaceEnabled: true
storage:
dbPath: "/opt/app/data/27071"
engine: wiredTiger
journal:
enabled: true
directoryPerDB: true
wiredTiger:
engineConfig:
cacheSizeGB: 1
directoryForIndexes: true
# 定义复制集的名称
replication:
oplogSizeMB: 800
replSetName: "rs"集群配置
初始化
在主节点上执行命令如下:文章来源地址https://www.toymoban.com/news/detail-699440.html
# 执行命令
rs.initiate()
####
#若客户端返回信息中字段OK的值为1，说明成功初始化副本集。
#完成初始化命令,当前节点默认处于"SECONDARY(副本节点)"状态.
###等待几秒后,按回车键。自动选举自己为PRIMARY(主节点)添加成员节点
## 先默认初始化
rs.initiate()
##
cfg={_id:"xbrother",members:[{_id:0,host:'10.1.1.32:27017',priority:1},{_id:1,host:'10.1.1.33:27017',priority:0}]}
##
rs.initiate(cfg) 检查和测试
# 检查状态
rs.status()
## 主节点写入数据测试
rs:PRIMARY> db.user.insert({"name":"knight","age":30})
WriteResult({ "nInserted" : 1 })
rs:PRIMARY> db.user.find()
{ "_id" : ObjectId("64f9b892e61da94af298a9d3"), "name" : "knight", "age" : 30 }
rs:PRIMARY>
### 从节点查询数据
#### 从库开启读
rs:SECONDARY> rs.secondaryOk()
##
rs:SECONDARY> use test
switched to db test
rs:SECONDARY> db.user.find()
{ "_id" : ObjectId("64f9b892e61da94af298a9d3"), "name" : "knight", "age" : 30 }
rs:SECONDARY> 取消双机MongoDB
##
rs.remove("mongod3.example.net:27017")
# 重新加入双机
rs.reconfig(cfg)
文章来源：https://www.toymoban.com/news/detail-699440.html
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