mongodb副本集模式的单机部署+修改ip

环境:
OS:Centos 7
mongodb:4.4.22

1.解压
[root@localhost soft]# tar -xvf mongodb-linux-x86_64-rhel70-4.4.22.tgz
[root@localhost soft]# mv mongodb-linux-x86_64-rhel70-4.4.22 /usr/local/services/mongodb

2.创建目录
mkdir -p /home/middle/mongodb/data/
mkdir -p /home/middle/mongodb/log/
mkdir -p /home/middle/mongodb/run/
mkdir -p /home/middle/mongodb/conf

3.生成配置文件中用到的日志文件
echo>/home/middle/mongodb/log/mongodb.log

4.配置文件:

vi /home/middle/mongodb/conf/mongo.cnf

[root@localhost conf]# more mongo.cnf 
port=29001
fork=true
dbpath=/home/middle/mongodb/data
logpath=/home/middle/mongodb/log/mongodb.log
pidfilepath=/home/middle/mongodb/run/29001.pid
logappend=true
replSet=s1
bind_ip=192.168.1.108,127.0.0.1
oplogSize=16384
logRotate=reopen

5.启动
/usr/local/services/mongodb/bin/mongod -f /home/middle/mongodb/conf/mongo.cnf

6.配置副本集
/usr/local/services/mongodb/bin/mongo 192.168.1.108:29001
>use admin
>config={_id:'s1',members:[{_id:0,host:'192.168.1.108:29001'}]}
>rs.initiate(config)

##############################修改ip############################
1.停掉mongodb
/usr/local/services/mongodb/bin/mongo localhost:29001
use admin
db.shutdownServer()

2.修改网卡ip
由原来的192.168.1.108 修改成 192.168.1.109

[root@localhost network-scripts]# more ifcfg-enp0s3
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=enp0s3
UUID=2323beca-b693-4a2a-9fcf-6caa2f095bef
DEVICE=enp0s3
ONBOOT=yes
IPADDR=192.168.1.109
NETMASK=255.255.255.0
GATEWAY=192.168.1.1

3.重启网络
[root@localhost network-scripts]# service network restart

4.修改mongodb配置文件
[root@localhost ~]# vi /home/middle/mongodb/conf/mongo.cnf

port=29001
fork=true
dbpath=/home/middle/mongodb/data
logpath=/home/middle/mongodb/log/mongodb.log
pidfilepath=/home/middle/mongodb/run/29001.pid
logappend=true
replSet=s1
bind_ip=192.168.1.109,127.0.0.1
oplogSize=16384
logRotate=reopen

5.启动mongodb
[root@localhost ~]# /usr/local/services/mongodb/bin/mongod -f /home/middle/mongodb/conf/mongo.cnf

6.修改副本集
/usr/local/services/mongodb/bin/mongo 192.168.1.109:29001

查看当前的配置

> rs.conf()
{
        "_id" : "s1",
        "version" : 1,
        "term" : 1,
        "protocolVersion" : NumberLong(1),
        "writeConcernMajorityJournalDefault" : true,
        "members" : [
                {
                        "_id" : 0,
                        "host" : "192.168.1.108:29001",
                        "arbiterOnly" : false,
                        "buildIndexes" : true,
                        "hidden" : false,
                        "priority" : 1,
                        "tags" : {

                        },
                        "slaveDelay" : NumberLong(0),
                        "votes" : 1
                }
        ],
        "settings" : {
                "chainingAllowed" : true,
                "heartbeatIntervalMillis" : 2000,
                "heartbeatTimeoutSecs" : 10,
                "electionTimeoutMillis" : 10000,
                "catchUpTimeoutMillis" : -1,
                "catchUpTakeoverDelayMillis" : 30000,
                "getLastErrorModes" : {

                },
                "getLastErrorDefaults" : {
                        "w" : 1,
                        "wtimeout" : 0
                },
                "replicaSetId" : ObjectId("64d20b9a0dd2e7e36110962a")
        }
}

修改

cfg = rs.conf()
cfg.members[0].host="192.168.1.109:29001"
rs.reconfig(cfg, {force : true})

需要加上force关键字,否则会报如下错误:
replSetReconfig should only be run on a writable PRIMARY. Current state REMOVED