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mogodb replication set复制集

 

replication set复制集

简要命令

replication set复制集
replicattion set 多台服务器维护相同的数据副本,提高服务器的可用性.



Replication set 设置全过程
0:创建目录 
mkdir -p /data/r0 /data/r1 /data/r2


1:启动3个实例,且声明实例属于某复制集
./bin/mongod --port 27017 --dbpath /data/r0 --smallfiles --replSet rsa --fork --logpath /var/log/mongo17.log
./bin/mongod --port 27018 --dbpath /data/r1 --smallfiles --replSet rsa --fork --logpath /var/log/mongo18.log
./bin/mongod --port 27019 --dbpath /data/r2 --smallfiles --replSet rsa --fork --logpath /var/log/mongo19.log

2:配置
rsconf = {
    _id:'rsa',
    members:
    [
        {_id:0,
        host:'192.168.1.201:27017'
        }
    ]
}


3: 根据配置做初始化
rs.initiate(rsconf);

4: 添加节点
rs.add('192.168.1.201:27018');
rs.add('192.168.1.201:27019');


5:查看状态
rs.status();



6:删除节点
rs.remove('192.168.1.201:27019');

7:主节点插入数据
>use test
>db.user.insert({uid:1,name:'lily'});

8:连接secondary查询同步情况
./bin/mongo --port 27019
>use test
>show tables

rsa:SECONDARY> show tables;
Sat Aug 17 16:03:55.786 JavaScript execution failed: error: { "$err" : "not master and slaveOk=false", "code" : 13435 } 

8.1 出现上述错误,是因为slave默认不许读写
>rs.slaveOk();
>show tables

#看到与primary 一致的数据

详细过程

0:创建目录 

mkdir -p /data/r0 /data/r1 /data/r2

[mongod@mcw01 ~]$ ps -ef|grep mongo
root      16595  16566  0 10:57 pts/0    00:00:00 su - mongod
mongod    16596  16595  0 10:57 pts/0    00:00:02 -bash
mongod    16765      1  1 13:28 ?        00:02:13 mongod --dbpath=/mongodb/data --logpath=/mongodb/log/mongodb.log --port=27017 --logappend --fork
mongod    17150  16596  0 16:05 pts/0    00:00:00 ps -ef
mongod    17151  16596  0 16:05 pts/0    00:00:00 grep --color=auto mongo
[mongod@mcw01 ~]$ kill -2 16765
[mongod@mcw01 ~]$ ps -ef|grep mongo
root      16595  16566  0 10:57 pts/0    00:00:00 su - mongod
mongod    16596  16595  0 10:57 pts/0    00:00:02 -bash
mongod    17153  16596  0 16:05 pts/0    00:00:00 ps -ef
mongod    17154  16596  0 16:05 pts/0    00:00:00 grep --color=auto mongo
[mongod@mcw01 ~]$ ls /mongodb/
bin  conf  data  log
[mongod@mcw01 ~]$ mv /mongodb/* /tmp/
[mongod@mcw01 ~]$ mkdir /mongodb/m1{7..9}
[mongod@mcw01 ~]$ ls /mongodb/
m17  m18  m19
[mongod@mcw01 ~]$ mkdir /mongodb/mlog
[mongod@mcw01 ~]$ ls /mongodb/
m17  m18  m19  mlog
[mongod@mcw01 ~]$ 
[mongod@mcw01 ~]$ mongod #刚刚把命令都移走了
-bash: /mongodb/bin/mongod: No such file or directory
[mongod@mcw01 ~]$ cp -a /tmp/bin/  /mongodb/  #把命令再移动回来
[mongod@mcw01 ~]$ ls /mongodb/
bin  m17  m18  m19  mlog

1:启动3个实例,且声明实例属于某复制集

./bin/mongod --port 27017 --dbpath /data/r0 --smallfiles --replSet rsa --fork --logpath /var/log/mongo17.log
./bin/mongod --port 27018 --dbpath /data/r1 --smallfiles --replSet rsa --fork --logpath /var/log/mongo18.log
./bin/mongod --port 27019 --dbpath /data/r2 --smallfiles --replSet rsa --fork --logpath /var/log/mongo19.log

这里是测试，为了启动快才添加--smallfiles 的吧。如果实际使用的时候，应该不需要加这个参数。三个都指定同一个复制集，起名为rs2.

[mongod@mcw01 ~]$ mongod --dbpath /mongodb/m17 --logpath /mongodb/mlog/m17.log --fork --port 27017 --replSet rs2 --smallfiles
about to fork child process, waiting until server is ready for connections.
forked process: 17206
child process started successfully, parent exiting
[mongod@mcw01 ~]$ mongod --dbpath /mongodb/m18 --logpath /mongodb/mlog/m18.log --fork --port 27018 --replSet rs2 --smallfiles
about to fork child process, waiting until server is ready for connections.
forked process: 17234
child process started successfully, parent exiting
[mongod@mcw01 ~]$ mongod --dbpath /mongodb/m19 --logpath /mongodb/mlog/m19.log --fork --port 27019 --replSet rs2 --smallfiles
about to fork child process, waiting until server is ready for connections.
forked process: 17257
child process started successfully, parent exiting
[mongod@mcw01 ~]$ 
[mongod@mcw01 ~]$ ps -ef|grep -v grep |grep  dbpath  #查看，已经启动三个进程，都是同一个复制集
mongod    17206      1  1 16:15 ?        00:00:04 mongod --dbpath /mongodb/m17 --logpath /mongodb/mlog/m17.log --fork --port 27017 --replSet rs2 --smallfiles
mongod    17234      1  1 16:18 ?        00:00:01 mongod --dbpath /mongodb/m18 --logpath /mongodb/mlog/m18.log --fork --port 27018 --replSet rs2 --smallfiles
mongod    17257      1  2 16:18 ?        00:00:01 mongod --dbpath /mongodb/m19 --logpath /mongodb/mlog/m19.log --fork --port 27019 --replSet rs2 --smallfiles
[mongod@mcw01 ~]$

2:配置

rsconf = {
    _id:'rsa', #复制集名称
    members: #有哪些成员
    [ 
        {_id:0,
        host:'192.168.1.201:27017'
        }
    ]
}



var rsconf = {
    _id:'rs2',
    members:
      [
        {_id:0,
        host:'10.0.0.11:27017'
        },
        {_id:1,
        host:'10.0.0.11:27018'
        },
        {_id:2,
        host:'10.0.0.11:27019'
        }
      ]    
}

随便找一个节点进入，
[mongod@mcw01 ~]$ mongo --port 27017
.......
> #生成复制集配置变量
> var rsconf = {
...     _id:'rs2',
...     members:
...       [
...         {_id:0,
...         host:'10.0.0.11:27017'
...         },
... {_id:1,
...         host:'10.0.0.11:27018'
...         },
... {_id:2,
...         host:'10.0.0.11:27019'
...         }
...   ]
... }
> printjson(rsconf)  #打印一下变量
{
    "_id" : "rs2",
    "members" : [
        {
            "_id" : 0,
            "host" : "10.0.0.11:27017"
        },
        {
            "_id" : 1,
            "host" : "10.0.0.11:27018"
        },
        {
            "_id" : 2,
            "host" : "10.0.0.11:27019"
        }
    ]
}
>

3: 根据配置做初始化

rs.initiate(rsconf);

> #根据生成的复制集配置变量，做初始化。初始化完后直接进入不同的命令行前面的信息中rs2副本名称:other>
> rs.initiate(rsconf);
{ "ok" : 1 }
rs2:OTHER> 
rs2:OTHER> rs.status();  #执行命令查看复制集状态，
{
    "set" : "rs2",  #复制集名称
    "date" : ISODate("2022-03-04T08:31:33.312Z"),
    "myState" : 1, #状态
    "term" : NumberLong(1),
    "heartbeatIntervalMillis" : NumberLong(2000),
    "members" : [  #有哪些成员
        {
            "_id" : 0,
            "name" : "10.0.0.11:27017",
            "health" : 1,
            "state" : 1,
            "stateStr" : "PRIMARY",  #这个成员是主，其它两个不是，是SECONDARY
            "uptime" : 976,
            "optime" : {
                "ts" : Timestamp(1646382581, 2),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:29:41Z"),
            "infoMessage" : "could not find member to sync from",
            "electionTime" : Timestamp(1646382581, 1),
            "electionDate" : ISODate("2022-03-04T08:29:41Z"),
            "configVersion" : 1,
            "self" : true
        },
        {
            "_id" : 1,
            "name" : "10.0.0.11:27018",
            "health" : 1,
            "state" : 2,
            "stateStr" : "SECONDARY",
            "uptime" : 123,
            "optime" : {
                "ts" : Timestamp(1646382581, 2),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:29:41Z"),
            "lastHeartbeat" : ISODate("2022-03-04T08:31:33.193Z"),
            "lastHeartbeatRecv" : ISODate("2022-03-04T08:31:31.611Z"),
            "pingMs" : NumberLong(0),
            "syncingTo" : "10.0.0.11:27017",
            "configVersion" : 1
        },
        {
            "_id" : 2,
            "name" : "10.0.0.11:27019",
            "health" : 1,
            "state" : 2,
            "stateStr" : "SECONDARY",
            "uptime" : 123,
            "optime" : {
                "ts" : Timestamp(1646382581, 2),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:29:41Z"),
            "lastHeartbeat" : ISODate("2022-03-04T08:31:33.193Z"),
            "lastHeartbeatRecv" : ISODate("2022-03-04T08:31:31.663Z"),
            "pingMs" : NumberLong(0),
            "syncingTo" : "10.0.0.11:27018",
            "configVersion" : 1
        }
    ],
    "ok" : 1
}
rs2:PRIMARY>  #执行完查看状态的命令后，这里就变成了：复制集名称：主>

我们推出来进入备的
[mongod@mcw01 ~]$ mongo --port 27018
......
rs2:SECONDARY> #可以看到这里是复制集名称：SECONDARY>

这样就已经配置好复制集了

4: 添加节点

rs.add('192.168.1.201:27018');
rs.add('192.168.1.201:27019');

根据后面删除的方法，已经删除了两个结点，只剩一个节点了。下面我们再将节点添加上
rs2:PRIMARY> rs.remove('10.0.0.11:27018')
{ "ok" : 1 }
rs2:PRIMARY> rs.status();
{
    "set" : "rs2",
    "date" : ISODate("2022-03-04T08:43:55.005Z"),
    "myState" : 1,
    "term" : NumberLong(1),
    "heartbeatIntervalMillis" : NumberLong(2000),
    "members" : [
        {
            "_id" : 0,
            "name" : "10.0.0.11:27017",
            "health" : 1,
            "state" : 1,
            "stateStr" : "PRIMARY",
            "uptime" : 1718,
            "optime" : {
                "ts" : Timestamp(1646383431, 1),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:43:51Z"),
            "electionTime" : Timestamp(1646382581, 1),
            "electionDate" : ISODate("2022-03-04T08:29:41Z"),
            "configVersion" : 3,
            "self" : true
        }
    ],
    "ok" : 1
}
rs2:PRIMARY> 
rs2:PRIMARY> rs.add('10.0.0.11:27018')   #重新添加成员
{ "ok" : 1 }
rs2:PRIMARY> rs.add('10.0.0.11:27019')
{ "ok" : 1 }
rs2:PRIMARY> rs.status();
{
    "set" : "rs2",
    "date" : ISODate("2022-03-04T08:46:07.840Z"),
    "myState" : 1,
    "term" : NumberLong(1),
    "heartbeatIntervalMillis" : NumberLong(2000),
    "members" : [
        {
            "_id" : 0,
            "name" : "10.0.0.11:27017",
            "health" : 1,
            "state" : 1,
            "stateStr" : "PRIMARY",
            "uptime" : 1850,
            "optime" : {
                "ts" : Timestamp(1646383557, 1),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:45:57Z"),
            "electionTime" : Timestamp(1646382581, 1),
            "electionDate" : ISODate("2022-03-04T08:29:41Z"),
            "configVersion" : 5,
            "self" : true
        },
        {
            "_id" : 1,
            "name" : "10.0.0.11:27018",
            "health" : 1,
            "state" : 2,
            "stateStr" : "SECONDARY",
            "uptime" : 23,
            "optime" : {
                "ts" : Timestamp(1646383557, 1),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:45:57Z"),
            "lastHeartbeat" : ISODate("2022-03-04T08:46:06.067Z"),
            "lastHeartbeatRecv" : ISODate("2022-03-04T08:46:06.914Z"),
            "pingMs" : NumberLong(0),
            "syncingTo" : "10.0.0.11:27017",
            "configVersion" : 5
        },
        {
            "_id" : 2,
            "name" : "10.0.0.11:27019",
            "health" : 1,
            "state" : 2,
            "stateStr" : "SECONDARY",
            "uptime" : 7,
            "optime" : {
                "ts" : Timestamp(1646383557, 1),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:45:57Z"),
            "lastHeartbeat" : ISODate("2022-03-04T08:46:06.071Z"),
            "lastHeartbeatRecv" : ISODate("2022-03-04T08:46:06.066Z"),
            "pingMs" : NumberLong(0),
            "syncingTo" : "10.0.0.11:27018",
            "configVersion" : 5
        }
    ],
    "ok" : 1
}
rs2:PRIMARY>

5:查看状态

rs.status();

rs2:OTHER> rs.status();  #执行命令查看复制集状态，
{
    "set" : "rs2",  #复制集名称
    "date" : ISODate("2022-03-04T08:31:33.312Z"),
    "myState" : 1, #状态
    "term" : NumberLong(1),
    "heartbeatIntervalMillis" : NumberLong(2000),
    "members" : [  #有哪些成员
        {
            "_id" : 0,
            "name" : "10.0.0.11:27017",
            "health" : 1,
            "state" : 1,
            "stateStr" : "PRIMARY",  #这个成员是主，其它两个不是，是SECONDARY
            "uptime" : 976,
            "optime" : {
                "ts" : Timestamp(1646382581, 2),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:29:41Z"),
            "infoMessage" : "could not find member to sync from",
            "electionTime" : Timestamp(1646382581, 1),
            "electionDate" : ISODate("2022-03-04T08:29:41Z"),
            "configVersion" : 1,
            "self" : true
        },
        {
            "_id" : 1,
            "name" : "10.0.0.11:27018",
            "health" : 1,
            "state" : 2,
            "stateStr" : "SECONDARY",
            "uptime" : 123,
            "optime" : {
                "ts" : Timestamp(1646382581, 2),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:29:41Z"),
            "lastHeartbeat" : ISODate("2022-03-04T08:31:33.193Z"),
            "lastHeartbeatRecv" : ISODate("2022-03-04T08:31:31.611Z"),
            "pingMs" : NumberLong(0),
            "syncingTo" : "10.0.0.11:27017",
            "configVersion" : 1
        },
        {
            "_id" : 2,
            "name" : "10.0.0.11:27019",
            "health" : 1,
            "state" : 2,
            "stateStr" : "SECONDARY",
            "uptime" : 123,
            "optime" : {
                "ts" : Timestamp(1646382581, 2),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:29:41Z"),
            "lastHeartbeat" : ISODate("2022-03-04T08:31:33.193Z"),
            "lastHeartbeatRecv" : ISODate("2022-03-04T08:31:31.663Z"),
            "pingMs" : NumberLong(0),
            "syncingTo" : "10.0.0.11:27018",
            "configVersion" : 1
        }
    ],
    "ok" : 1
}

6:删除节点

rs.remove('192.168.1.201:27019');

rs2:PRIMARY> rs.remove('10.0.0.11:27019')
{ "ok" : 1 }
rs2:PRIMARY> rs.status();
{
    "set" : "rs2",
    "date" : ISODate("2022-03-04T08:40:48.604Z"),
    "myState" : 1,
    "term" : NumberLong(1),
    "heartbeatIntervalMillis" : NumberLong(2000),
    "members" : [
        {
            "_id" : 0,
            "name" : "10.0.0.11:27017",
            "health" : 1,
            "state" : 1,
            "stateStr" : "PRIMARY",
            "uptime" : 1531,
            "optime" : {
                "ts" : Timestamp(1646383235, 1),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:40:35Z"),
            "electionTime" : Timestamp(1646382581, 1),
            "electionDate" : ISODate("2022-03-04T08:29:41Z"),
            "configVersion" : 2,
            "self" : true
        },
        {
            "_id" : 1,
            "name" : "10.0.0.11:27018",
            "health" : 1,
            "state" : 2,
            "stateStr" : "SECONDARY",
            "uptime" : 679,
            "optime" : {
                "ts" : Timestamp(1646383235, 1),
                "t" : NumberLong(1)
            },
            "optimeDate" : ISODate("2022-03-04T08:40:35Z"),
            "lastHeartbeat" : ISODate("2022-03-04T08:40:47.168Z"),
            "lastHeartbeatRecv" : ISODate("2022-03-04T08:40:47.188Z"),
            "pingMs" : NumberLong(0),
            "syncingTo" : "10.0.0.11:27017",
            "configVersion" : 2
        }
    ],
    "ok" : 1
}
rs2:PRIMARY>

7:主节点插入数据

>use test
>db.user.insert({uid:1,name:'lily'});

 

8:连接secondary查询同步情况

./bin/mongo --port 27019
>use test
>show tables

rsa:SECONDARY> show tables;
Sat Aug 17 16:03:55.786 JavaScript execution failed: error: { "$err" : "not master and slaveOk=false", "code" : 13435 } 


在主上是可以查看的
rs2:PRIMARY> show dbs;
local  0.000GB
rs2:PRIMARY> 
但是当我们进入从的时候，无法查询，报错不是主
[mongod@mcw01 ~]$ mongo --port 27018
......
rs2:SECONDARY> show dbs;
2022-03-04T16:51:53.478+0800 E QUERY    [thread1] Error: listDatabases failed:{ "ok" : 0, "errmsg" : "not master and slaveOk=false", "code" : 13435 } :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
Mongo.prototype.getDBs@src/mongo/shell/mongo.js:62:1
shellHelper.show@src/mongo/shell/utils.js:761:19
shellHelper@src/mongo/shell/utils.js:651:15
@(shellhelp2):1:1

SECONDARY默认不允许读写

rs2:SECONDARY> 
rs2:SECONDARY> rs.slaveOk(); 那我们按错误信息将它设置成ok，这样从就可以读取数据了
rs2:SECONDARY> show dbs;
local  0.000GB
rs2:SECONDARY> 

在主上插入数据
rs2:PRIMARY> use test
switched to db test
rs2:PRIMARY> db.user.insert({uid:1,name:'lily'});
WriteResult({ "nInserted" : 1 })
rs2:PRIMARY> db.user.find();
{ "_id" : ObjectId("6221d4bfabd9594d8ce84607"), "uid" : 1, "name" : "lily" }
rs2:PRIMARY> 

我们在从上去查看，数据是同步的。一样的。
rs2:SECONDARY> show dbs;
local  0.000GB
test   0.000GB
rs2:SECONDARY> use test;
switched to db test
rs2:SECONDARY> show tables;
user
rs2:SECONDARY> db.user.find();
{ "_id" : ObjectId("6221d4bfabd9594d8ce84607"), "uid" : 1, "name" : "lily" }
rs2:SECONDARY> 


8.1 出现上述错误,是因为slave默认不许读写
>rs.slaveOk();
>show tables

#看到与primary 一致的数据

9、当我将主上的服务停掉，模拟服务宕了

rs2:PRIMARY> use admin
switched to db admin
rs2:PRIMARY> db.shutdownServer()
server should be down...
2022-03-04T17:02:15.304+0800 I NETWORK  [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2022-03-04T17:02:16.387+0800 I NETWORK  [thread1] Socket recv() errno:104 Connection reset by peer 127.0.0.1:27017
2022-03-04T17:02:16.388+0800 I NETWORK  [thread1] SocketException: remote: (NONE):0 error: 9001 socket exception [RECV_ERROR] server [127.0.0.1:27017] 
2022-03-04T17:02:16.388+0800 I NETWORK  [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) failed failed 
2022-03-04T17:02:16.391+0800 I NETWORK  [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2022-03-04T17:02:16.392+0800 W NETWORK  [thread1] Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2022-03-04T17:02:16.392+0800 I NETWORK  [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) failed failed 
> 

然后我们去27018节点上去查看复制集状态。发现27017健康是0。并且主节点已经由27017变为27018了
rs2:SECONDARY> rs.status();
{
    "set" : "rs2",
    "date" : ISODate("2022-03-04T09:04:46.442Z"),
    "myState" : 1,
    "term" : NumberLong(2),
    "heartbeatIntervalMillis" : NumberLong(2000),
    "members" : [
        {
            "_id" : 0,
            "name" : "10.0.0.11:27017",
            "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("2022-03-04T09:04:46.304Z"),
            "lastHeartbeatRecv" : ISODate("2022-03-04T09:02:13.762Z"),
            "pingMs" : NumberLong(0),
            "lastHeartbeatMessage" : "Connection refused",
            "configVersion" : -1
        },
        {
            "_id" : 1,
            "name" : "10.0.0.11:27018",
            "health" : 1,
            "state" : 1,
            "stateStr" : "PRIMARY",
            "uptime" : 2769,
            "optime" : {
                "ts" : Timestamp(1646384546, 1),
                "t" : NumberLong(2)
            },
            "optimeDate" : ISODate("2022-03-04T09:02:26Z"),
            "electionTime" : Timestamp(1646384545, 1),
            "electionDate" : ISODate("2022-03-04T09:02:25Z"),
            "configVersion" : 5,
            "self" : true
        },
        {
            "_id" : 2,
            "name" : "10.0.0.11:27019",
            "health" : 1,
            "state" : 2,
            "stateStr" : "SECONDARY",
            "uptime" : 1123,
            "optime" : {
                "ts" : Timestamp(1646384546, 1),
                "t" : NumberLong(2)
            },
            "optimeDate" : ISODate("2022-03-04T09:02:26Z"),
            "lastHeartbeat" : ISODate("2022-03-04T09:04:46.267Z"),
            "lastHeartbeatRecv" : ISODate("2022-03-04T09:04:45.029Z"),
            "pingMs" : NumberLong(0),
            "syncingTo" : "10.0.0.11:27018",
            "configVersion" : 5
        }
    ],
    "ok" : 1
}
rs2:PRIMARY> 

在当前的主27018上插入数据
rs2:PRIMARY> use test
switched to db test
rs2:PRIMARY> show tables;
user
rs2:PRIMARY> db.user.insert({uid:2,name:'xiaoma'})
WriteResult({ "nInserted" : 1 })
rs2:PRIMARY> db.user.find()
{ "_id" : ObjectId("6221d4bfabd9594d8ce84607"), "uid" : 1, "name" : "lily" }
{ "_id" : ObjectId("6221d775ef402350b10ce148"), "uid" : 2, "name" : "xiaoma" }
rs2:PRIMARY> 


然后去27019上现在这个从上去查看,能看到新的主27018上创建的数据
[mongod@mcw01 ~]$ mongo --port 27019
.......
rs2:SECONDARY> show dbs;
2022-03-04T17:11:47.714+0800 E QUERY    [thread1] Error: listDatabases failed:{ "ok" : 0, "errmsg" : "not master and slaveOk=false", "code" : 13435 } :
_getErrorWithCode@src/mongo/shell/utils.js:25:13
Mongo.prototype.getDBs@src/mongo/shell/mongo.js:62:1
shellHelper.show@src/mongo/shell/utils.js:761:19
shellHelper@src/mongo/shell/utils.js:651:15
@(shellhelp2):1:1

rs2:SECONDARY> rs.slaveOk();
rs2:SECONDARY> show dbs;
local  0.000GB
test   0.000GB
rs2:SECONDARY> use test;
switched to db test
rs2:SECONDARY> show tables;
user
rs2:SECONDARY> db.user.find();
{ "_id" : ObjectId("6221d4bfabd9594d8ce84607"), "uid" : 1, "name" : "lily" }
{ "_id" : ObjectId("6221d775ef402350b10ce148"), "uid" : 2, "name" : "xiaoma" }
rs2:SECONDARY>

免交互执行mogodb的命令，可实现程序一键部署

启动3个实例，然后进入某个实例进行初始化就完成单机复制集 集群配置了。
[mongod@mcw01 ~]$ mongo --port 27018 <<EOF
use admin
var rsconf = {
_id: 'rs2',
members:[{},
{},
]};
printjson(rsconf);
<<
EOF

MongoDB shell version: 3.2.8
connecting to: 127.0.0.1:27018/test
switched to db admin
{ "_id" : "rs2", "members" : [ { }, { } ] }

bye
[mongod@mcw01 ~]$

 

[mongod@mcw01 ~]$ sh 1.sh install
about to fork child process, waiting until server is ready for connections.
forked process: 19633
child process started successfully, parent exiting
about to fork child process, waiting until server is ready for connections.
forked process: 19652
child process started successfully, parent exiting
about to fork child process, waiting until server is ready for connections.
forked process: 19679
child process started successfully, parent exiting
[mongod@mcw01 ~]$ 


[mongod@mcw01 ~]$ sh 1.sh repl
MongoDB shell version: 3.2.8
connecting to: 127.0.0.1:27017/test
switched to db admin
{ "ok" : 1 }

bye
[mongod@mcw01 ~]$ cat 1.sh 
#!/bin/bash
#复制集配置
IP='10.0.0.11'  #主机ip
NA='rs3'  #复制集名称

if [ "$1" = "reset" ]
then
    kill -2 `ps -ef|grep -v grep |grep logpath|awk '{print $2}'`
    sleep 2
    rm -rf /mongodb/m{17,18,19,log}/*
    exit
fi

if [ "$1" = "install" ]
then
  mkdir -p /mongodb/m{17,18,19,log}/
  mongod --dbpath /mongodb/m17 --logpath /mongodb/mlog/m17.log --logappend --fork --port 27017 --replSet ${NA}  --smallfiles
  mongod --dbpath /mongodb/m18 --logpath /mongodb/mlog/m18.log --logappend --fork --port 27018 --replSet ${NA}  --smallfiles
  mongod --dbpath /mongodb/m19 --logpath /mongodb/mlog/m19.log --logappend --fork --port 27019 --replSet ${NA}  --smallfiles
   exit
 fi
 
 if [ "$1" = "repl" ]
then
mongo --port 27017 <<EOF

use admin;
var rsconf = {
_id:'${NA}',
members:[
{_id:0,host:'${IP}:27017'},
{_id:1,host:'${IP}:27018'},
{_id:2,host:'${IP}:27019'},
]
};
rs.initiate(rsconf);
<<
EOF
fi
[mongod@mcw01 ~]$

 

posted @ 2022-03-04 19:50  马昌伟  阅读(42)  评论(0)  编辑  收藏  举报
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