mongo（五）副本集

mongo（五）副本集

配置文件

1-3为三个存储节点，其实一个为Primary，两个secondary作为备份，4为仲裁节点

# mongod.conf



#where to log

logpath=/home/data/db/mongodb2.log



logappend=true



# fork and run in background

fork=true



port=33197



dbpath=/home/yuxianda/data/db/db2



# location of pidfile

pidfilepath=/home/yuxianda/data/db/mongod2.pid



# Listen to local interface only. Comment out to listen on all interfaces. 

bind_ip=127.0.0.1



#datebase in diffrent file

directoryperdb=true



# fsync time

#syncdelay=5



# Disables write-ahead journaling

# nojournal=true



# Enables periodic logging of CPU utilization and I/O wait

#cpu=true



# Turn on/off security.  Off is currently the default

#noauth=true

#auth=true



# Verbose logging output.

#verbose=true



# Inspect all client data for validity on receipt (useful for

# developing drivers)

#objcheck=true



# Enable db quota management

#quota=true



# Set oplogging level where n is

#   0=off (default)

#   1=W

#   2=R

#   3=both

#   7=W+some reads

#diaglog=0



# Ignore query hints

#nohints=true



# Enable the HTTP interface (Defaults to port 28017).

#httpinterface=true



# Turns off server-side scripting.  This will result in greatly limited

# functionality

#noscripting=true



# Turns off table scans.  Any query that would do a table scan fails.

#notablescan=true



# Disable data file preallocation.

#noprealloc=true



# Specify .ns file size for new databases.

# nssize=<size>



# Replication Options



# in replicated mongo databases, specify the replica set name here

replSet=android-test

# maximum size in megabytes for replication operation log

#oplogSize=1024

# path to a key file storing authentication info for connections

# between replica set members

#keyFile=/path/to/keyfile

mongo.conf

执行配置

mongod -f conf.conf

 

设定副本集合：

mongo --port 33198

use admin

db.runCommand({"replSetInitiate":{

    "_id":"android-test",

    "members":[

    {

          "_id":1,

          "host":"127.0.0.1:33198"

    },

     {

          "_id":2,

          "host":"127.0.0.1:33197"

    },

     {

          "_id":3,

          "host":"127.0.0.1:33196"

    }

    ]}})

增加仲裁节点

rs.addArb("127.0.0.1:33195")

 

#!/usr/bin/env python

#-*- encoding:utf-8 -*-



from pymongo import MongoClient, MongoReplicaSetClient



dbList = '127.0.0.1:33198,127.0.0.1:33197,127.0.0.1:33196'





def init(dbname):

    try:

        client = MongoReplicaSetClient(dbList, replicaSet='android-    test')

        db = client[dbname]

        return db

    except Exception as e:

        print 'error:%s'%e

        return False



if __name__ == '__main__':

    db = init('test')

print db.appinfo.find_one()