【MongoDB学习笔记32】MongoDB修改副本集配置
一、删除副本集成员
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spock:PRIMARY> rs.config()
{
"_id"
:
"spock"
,
"version"
: 1,
"members"
: [
{
"_id"
: 0,
"host"
:
"192.168.1.112:27017"
},
{
"_id"
: 1,
"host"
:
"192.168.1.113:27017"
}
]
}
spock:PRIMARY> rs.remove(
"192.168.1.113:27017"
)
{
"errmsg"
:
"exception: can't find self in new replset config"
,
"code"
: 13433,
"ok"
: 0
}
spock:PRIMARY> rs.remove(
"192.168.1.112:27017"
)
2015-02-02T21:59:13.303+0800 DBClientCursor::init call() failed
2015-02-02T21:59:13.304+0800 Error: error doing query: failed at src
/mongo/shell/query
.js:81
2015-02-02T21:59:13.305+0800 trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2015-02-02T21:59:13.308+0800 reconnect 127.0.0.1:27017 (127.0.0.1) ok
spock:PRIMARY> rs.config()
{
"_id"
:
"spock"
,
"version"
: 2,
"members"
: [
{
"_id"
: 1,
"host"
:
"192.168.1.113:27017"
}
]
}
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二、添加副本集成员
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spock:PRIMARY> rs.add(
"192.168.1.112:27017"
)
{
"ok"
: 1 }
spock:PRIMARY> rs.config()
{
"_id"
:
"spock"
,
"version"
: 3,
"members"
: [
{
"_id"
: 1,
"host"
:
"192.168.1.113:27017"
},
{
"_id"
: 2,
"host"
:
"192.168.1.112:27017"
}
]
}
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从上述过程来看，配置文档中version字段都会自增，它的初始值为1；
三、或者通过rs.reconfig()函数修改副本集
例如，将host用主机名来替代ip地址
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[root@localhost ~]
# ping host113
PING host113 (192.168.1.113) 56(84) bytes of data.
64 bytes from host113 (192.168.1.113): icmp_seq=1 ttl=64
time
=0.060 ms
64 bytes from host113 (192.168.1.113): icmp_seq=2 ttl=64
time
=0.030 ms
64 bytes from host113 (192.168.1.113): icmp_seq=3 ttl=64
time
=0.026 ms
64 bytes from host113 (192.168.1.113): icmp_seq=4 ttl=64
time
=1.04 ms
--- host113
ping
statistics ---
4 packets transmitted, 4 received, 0% packet loss,
time
3001ms
rtt min
/avg/max/mdev
= 0.026
/0
.289
/1
.041
/0
.434 ms
[root@localhost ~]
# mongo
MongoDB shell version: 2.6.7
connecting to:
test
spock:PRIMARY> rs.config()
{
"_id"
:
"spock"
,
"version"
: 3,
"members"
: [
{
"_id"
: 1,
"host"
:
"192.168.1.113:27017"
},
{
"_id"
: 2,
"host"
:
"192.168.1.112:27017"
}
]
}
spock:PRIMARY> var config=rs.config()
spock:PRIMARY> config.members[0].host=
"host113:27017"
host113:27017
spock:PRIMARY> rs.reconfig(config)
2015-02-02T22:21:22.793+0800 DBClientCursor::init call() failed
2015-02-02T22:21:22.795+0800 trying reconnect to 127.0.0.1:27017 (127.0.0.1) faile
2015-02-02T22:21:22.797+0800 reconnect 127.0.0.1:27017 (127.0.0.1) ok
reconnected to server after rs
command
(
which
is normal)
spock:PRIMARY> rs.config()
{
"_id"
:
"spock"
,
"version"
: 4,
"members"
: [
{
"_id"
: 1,
"host"
:
"host113:27017"
},
{
"_id"
: 2,
"host"
:
"192.168.1.112:27017"
}
]
}
spock:PRIMARY>
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对于复杂的副本集配置，rs.reconfig函数修改比rs.add和rs.remove更有用；
本文转自 bannerpei 51CTO博客，原文链接：http://blog.51cto.com/281816327/1610912，如需转载请自行联系原作者