MongoDB shell version: 2.4.3
connecting to: localhost:10001/test
blort:PRIMARY> show dbs
local 1.078125GB
blort:PRIMARY> use fensme
switched to db fensme
blort:PRIMARY> db.user.insert({uid:10001})
blort:PRIMARY> db.user.find()
{ “_id” : ObjectId(“51a8454813321f05df62a8c8″), “uid” : 10001 }
连接node2，SECONDARY查询数据
~ mongo localhost:10002
MongoDB shell version: 2.4.3
connecting to: localhost:10002/test
blort:SECONDARY> show dbs
fensme 0.203125GB
local 1.078125GB
blort:SECONDARY> use fensme
switched to db fensme
blort:SECONDARY> show collections
Fri May 31 14:39:22.276 java script execution failed: error: { “$err” : “not master and slaveOk=false”, “code” : 13435 } at src/mongo/shell/query.js:L128
blort:SECONDARY> db.user.find()
error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
提示是不是master/slave的结构，SECONDARY不许允查询。
模拟 PRIMARY失败，SECONDARY自动切换
ps -aux|grep mongod
conan 5110 0.4 2.1 1723616 44608 Sl 14:23 0:05 mongod --dbpath /home/conan/dbs/node1 --port 10001 --replSet blort --nojournal --fork --logpath /home/conan/dbs/node1.log
conan 5173 0.4 2.2 1693812 45960 Sl 14:24 0:04 mongod --dbpath /home/conan/dbs/node2 --port 10002 --replSet blort --nojournal --fork --logpath /home/conan/dbs/node2.log
conan 5218 0.4 2.2 1692800 45548 Sl 14:24 0:04 mongod --dbpath /home/conan/dbs/node3 --port 10003 --replSet blort --nojournal --fork --logpath /home/conan/dbs/node3.log
kill -9 5110
ps -aux|grep mongod
conan 5173 0.4 2.2 1703048 46096 Sl 14:24 0:04 mongod --dbpath /home/conan/dbs/node2 --port 10002 --replSet blort --nojournal --fork --logpath /home/conan/dbs/node2.log
conan 5218 0.4 2.2 1702036 45696 Sl 14:24 0:04 mongod --dbpath /home/conan/dbs/node3 --port 10003 --replSet blort --nojournal --fork --logpath /home/conan/dbs/node3.log
连接node2，SECONDARY查询节点重新选举
~ mongo localhost:10002
MongoDB shell version: 2.4.3
connecting to: localhost:10002/test
blort:SECONDARY> rs.status()
{
“set” : “blort”,
“date” : ISODate(“2013-05-31T06:42:51Z”),
“myState” : 2,
“syncingTo” : “localhost:10003″,
“members” : [
{
"_id" : 1,
"name" : "localhost:10001",
"health" : 0,
"stateStr" : "(not reachable/healthy)",
"uptime" : 0,
"optime" : {
"t" : 1369982280,
"i" : 1
},
"optimeDate" : ISODate("2013-05-31T06:38:00Z"),
"lastHeartbeat" : ISODate("2013-05-31T06:42:51Z"),
"lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
"pingMs" : 0
},
{
"_id" : 2,
"name" : "localhost:10002",
"health" : 1,
"state" : 2,
"stateStr" : "SECONDARY",
"uptime" : 1088,
"optime" : {
"t" : 1369982280,
"i" : 1
},
"optimeDate" : ISODate("2013-05-31T06:38:00Z"),
"errmsg" : "syncing to: localhost:10003",
"self" : true
},
{
"_id" : 3,
"name" : "localhost:10003",
"health" : 1,
"state" : 1,
"stateStr" : "PRIMARY",
"uptime" : 946,
"optime" : {
"t" : 1369982280,
"i" : 1
},
"optimeDate" : ISODate("2013-05-31T06:38:00Z"),
"lastHeartbeat" : ISODate("2013-05-31T06:42:51Z"),
"lastHeartbeatRecv" : ISODate("1970-01-01T00:00:00Z"),
"pingMs" : 0,
"syncingTo" : "localhost:10001"
}
],
“ok” : 1
}
查看结果：
localhost:10001 ： not reachable/healthy
localhost:10002： SECONDARY
localhost:10003： PRIMARY
连接node3, localhost:10003查看数据
mongo localhost:10003
MongoDB shell version: 2.4.3
connecting to: localhost:10003/test
blort:PRIMARY> show dbs
fensme 0.203125GB
local 1.078125GB
blort:PRIMARY> use fensme