MongoDB Learning Note 32 MongoDB modifying replica set configuration

One, delete replica set members

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"                      }             ]    }

second, add replica set members

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"                      }             ]    }

From the above process, the version field in the configuration document will be self-increment, its initial value is 1;

Third, or modify the replica set through the Rs.reconfig () function

For example, host name is used instead of IP address

[[email protected] ~]# ping host113   ping host113  (192.168.1.113 )  56 ( 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  &Nbsp; [[email protected] ~]# 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)  faile2015-02-02T22:21:22.797+0800  reconnect 127.0.0.1:27017  (127.0.0.1)  ok    reconnected to server  after rs command&nbSP; (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> 

For complex replica set configurations, Rs.reconfig function modifications are more useful than rs.add and rs.remove;

This article is from the "Margin with Wish" blog, please be sure to keep this source http://281816327.blog.51cto.com/907015/1610912

MongoDB Learning Note 32 MongoDB modifying replica set configuration