mongdb无认证集群建立

容灾 (replSet) 高可用

window 平台 mongodb操作

启动 mongo server 时，需要指明 replSet 名

启动3个终端

$ mkdir -p ./copyMain/logs ./copyBk1/logs ./copyBk2/logs # 需要先建立文件夹
$ mongod.exe --port=27017 --replSet=copy --dbpath=./copyMain

$ mongod.exe --port=27018 --replSet=copy --dbpath=./copyBk1

$ mongod.exe --port=27019 --replSet=copy --dbpath=./copyBk2

replSet 名需要是一样的，默认是 27017 作为 primary (主机)

mongodb 命令 初始化集群配置

# 连接
$ mongo.exe 127.0.0.1:27018  # 登录 slave 节点
####### 下面的操作是在 mongodb 终端下操作的 

# 编写 replSet 配置
################## 第一个 _id  应该是 上述的 "copy"
> config = { _id:"copy", members:[
... {_id:0,host:"localhost:27017"},
... {_id:1,host:"localhost:27018"},
... {_id:2,host:"localhost:27019"}]
... };
#初始化 副本节点
> rs.initiate(config);  # 提示 {"ok":0,...}
# 初始化后
> copy:SECONDARY> rs.status()
{
"set" : "copy",
"date" : ISODate("2017-08-30T07:35:01.690Z"),
"myState" : 1,
"members" : [
    {
        "_id" : 0,
        "name" : "localhost:27017",
        "health" : 1,
        "state" : 5,
        "stateStr" : "STARTUP2",  ################ 此处显示是否为 主机
        "uptime" : 173,
        "optime" : Timestamp(0, 0),
        "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
        "lastHeartbeat" : ISODate("2017-08-30T07:35:01.461Z"),
        "lastHeartbeatRecv" : ISODate("2017-08-30T07:35:01.628Z"),
        "pingMs" : 0,
        "configVersion" : 1
    },
    {
        "_id" : 1,
        "name" : "localhost:27018",
        "health" : 1,
        "state" : 1,
        "stateStr" : "PRIMARY",    ################ 此处显示是否为 主机
        "uptime" : 1767,
        "optime" : Timestamp(1504078428, 1),
        "optimeDate" : ISODate("2017-08-30T07:33:48Z"),
        "electionTime" : Timestamp(1504078432, 1),
        "electionDate" : ISODate("2017-08-30T07:33:52Z"),
        "configVersion" : 1,
        "self" : true
    },
    {
        "_id" : 2,
        "name" : "localhost:27019",
        "health" : 1,
        "state" : 5,
        "stateStr" : "STARTUP2",  ################ 此处显示是否为 主机
        "uptime" : 173,
        "optime" : Timestamp(0, 0),
        "optimeDate" : ISODate("1970-01-01T00:00:00Z"),
        "lastHeartbeat" : ISODate("2017-08-30T07:35:00.301Z"),
        "lastHeartbeatRecv" : ISODate("2017-08-30T07:35:00.006Z"),
        "pingMs" : 1,
        "configVersion" : 1
    }
],
"ok" : 1
}

# 继续进入另外一个 mongo.exe 127.0.0.1:27019
$ mongo.exe 127.0.0.1:27019
> rs.status() ######### 状态值和上面的是一样的  27018 为主机