docker部署mongodb副本集

1.规格

2.部署操作

2.1 以下操作分别在三台不同的ECS服务器上操作

[root@ecs-ff50-73e8-0002 ~]# mkdir /path/to -p

[root@ecs-ff50-73e8-0002 ~]# cd /path/to/

[root@ecs-ff50-73e8-0002 to]# ls

[root@ecs-ff50-73e8-0002 to]# mkdir  logs  data  config

[root@ecs-ff50-73e8-0002 to]# cd ..

[root@ecs-ff50-73e8-0002 path]# chown -R 999 to

[root@ecs-ff50-73e8-0002 path]# cd to/

[root@ecs-ff50-73e8-0002 to]# ll

total 12

drwxr-xr-x 2 polkitd root 4096 Jun 22 09:59 config

drwxr-xr-x 4 polkitd root 4096 Jun 22 10:10 data

drwxr-xr-x 2 polkitd root 4096 Jun 22 09:59 logs

2.2 创建docker网络：

docker network create mongo-cluster

docker run -d --name mongo \

-p 27017:27017 \

-v /path/to/data:/data/db \

-v /path/to/config:/data/configdb \

-v /path/to/logs:/var/log/mongodb \

--network mongo-cluster \

mongo:4.0 \

mongod --replSet rs0 --bind_ip_all --logpath /var/log/mongodb/mongod.log

等待三台ECS的容器的状态都是up，接着往下操作

[root@ecs-ff50-73e8-0001 to]# docker ps

CONTAINER ID   IMAGE          COMMAND                  CREATED          STATUS          PORTS                                           NAMES

c74428d6f17e   mongo:latest   "docker-entrypoint.s…"   24 minutes ago   Up 24 minutes   0.0.0.0:27017->27017/tcp, :::27017->27017/tcp   mongo

#进入容器的命令 docker exec -it 容器id  /bin/bash

Docker exec -it c74428d6f17e  /bin/bash

[root@ecs-ff50-73e8-0001 path]# docker ps

CONTAINER ID   IMAGE          COMMAND                  CREATED         STATUS         PORTS                                           NAMES

64e6de21a8bf   mongo:latest   "docker-entrypoint.s…"   3 minutes ago   Up 3 minutes   0.0.0.0:27017->27017/tcp, :::27017->27017/tcp   mongo

[root@ecs-ff50-73e8-0001 path]# docker exec -it  64e6de21a8bf /bin/bash

root@64e6de21a8bf:/# mongo

MongoDB shell version v5.0.5

connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb

Implicit session: session { "id" : UUID("0f6aeeba-af39-4010-a551-c9f1e52e791f") }

MongoDB server version: 5.0.5

==========================省悦，附带截图如下

执行如下操作

rs0:SECONDARY>  use admin

switched to db admin

rs0:SECONDARY> config = { _id:"repset", members:[{_id:0,host:"192.168.1.101:27017"},{_id:1,host:"192.168.1.100:27017"},{_id:2,host:"192.169.0.102:27017"}]}

返回信息如下：

初始化副本集配置，执行命令如下：

rs0:PRIMARY> rs.initiate(config);

返回信息如下：

查看集群节点的状态，执行如下命令

repset:SECONDARY> rs.status();

返回信息如下：

如上信息表明：

副本集配置成功后，192.168.101为主节点PRIMARY，192.168.1.100/102为副本节点SECONDARY。

health：1   1表明状态是正常，0表明异常

state:1     值小的是primary节点、值大的是secondary节点

3.测试Mongodb副本集数据复制功能

在第一台服务器上写入数据：

rs0:PRIMARY>  use test;    #切换到test库

switched to db test

rs0:PRIMARY> db.testdb.insert({"test1":"testval1"})   写入数据

WriteResult({ "nInserted" : 1 })

在第二台服务器上进行查看数据：

[root@ecs-ff50 ~]# docker ps

CONTAINER ID   IMAGE          COMMAND                  CREATED          STATUS          PORTS                                           NAMES

b0a0b2f823f8   mongo:latest   "docker-entrypoint.s…"   28 minutes ago   Up 28 minutes   0.0.0.0:27017->27017/tcp, :::27017->27017/tcp   mongo

[root@ecs-ff50 ~]# docker exec -it b0a0b2f823f8 /bin/bash

root@b0a0b2f823f8:/# mongo

MongoDB shell version v5.0.5

connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb

Implicit session: session { "id" : UUID("a77cd5e2-fc1e-4aa5-932a-451ecdc93ce5") }

MongoDB server version: 5.0.5

执行如下操作。发现报错

rs0:SECONDARY> use  test  

switched to db test

rs0:SECONDARY>  show tables;

uncaught exception: Error: listCollections failed: {

        "topologyVersion" : {

                "processId" : ObjectId("6493b000675804e2db3d22b9"),

                "counter" : NumberLong(4)

        },

        "ok" : 0,

        "errmsg" : "not master and slaveOk=false",

        "code" : 13435,

        "codeName" : "NotPrimaryNoSecondaryOk",

        "$clusterTime" : {

                "clusterTime" : Timestamp(1687402264, 1),

                "signature" : {

                        "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),

                        "keyId" : NumberLong(0)

                }

        },

        "operationTime" : Timestamp(1687402264, 1)

} :

_getErrorWithCode@src/mongo/shell/utils.js:25:13

DB.prototype._getCollectionInfosCommand@src/mongo/shell/db.js:718:15

DB.prototype.getCollectionInfos@src/mongo/shell/db.js:766:16

shellHelper.show@src/mongo/shell/utils.js:943:9

shellHelper@src/mongo/shell/utils.js:838:15

@(shellhelp2):1:1

这是因为mongodb默认是从主节点读写数据的，副本节点上不允许读，需要设置副本节点可以读

rs0:SECONDARY> db.getMongo().setSlaveOk();

WARNING: setSlaveOk() is deprecated and may be removed in the next major release. Please use setSecondaryOk() instead.

rs0:SECONDARY>

rs0:SECONDARY>

rs0:SECONDARY>  db.testdb.find();

{ "_id" : ObjectId("6493b5858e3154da611dc177"), "test1" : "testval1" }

rs0:SECONDARY>

rs0:SECONDARY>

rs0:SECONDARY>  show tables;

testdb

rs0:SECONDARY>

rs0:SECONDARY>

发现数据已经同步过来了

4.测试副本集故障切换功能

停掉第一台服务器执行如下操作

[root@ecs-ff50-73e8-0001 path]# docker ps

CONTAINER ID   IMAGE          COMMAND                  CREATED          STATUS          PORTS                                           NAMES

64e6de21a8bf   mongo:latest   "docker-entrypoint.s…"   38 minutes ago   Up 38 minutes   0.0.0.0:27017->27017/tcp, :::27017->27017/tcp   mongo

[root@ecs-ff50-73e8-0001 path]# docker stop  64e6de21a8bf

64e6de21a8bf

在其他节点，查看副本集的状态

repset:PRIMARY> rs.status();

返回信息如下：

从节点的SECONDARY  切换成PRIMARY表面，故障切换成功。