測試架構：

測試目的：


?? ?測試一個config server 服務器掛機后，集群是否能讀寫數據。

測試原因：

?? ?上周因為內存吃緊，準備添加內存。在查看服務器時，把一臺服務器關機檢查。
?? ?關機后，WEB 端應用出錯，用戶無法登錄，所有都出錯。

?? ?但在我理解，因為CONFIG是3臺冗余的，一臺關機，應該不會產生影響才對，或者說不會影響到無法
?? ?登錄，應用不能正常運行。只是會有數據不均衡啊。

?? ?但我使用mongochef 登錄，確實登錄數據庫不成功。


測試結果：

?? ?經下面的測試，印證了我的理解，一臺config 宕機，只是會提示連接config 出錯，
?? ?但能登錄數據庫，插入數據的代碼（mongo -port 28000 登錄后運行的JS 代碼），還能正常運行下去。


?? ?但為什么當時WEB 端會出錯，我看到他們php 配置文件中如下：
?? ?$connect = new MongoClient("mongodb://192.168.2.188:28000,192.168.2.132:28000", array("replicaSet" => "myReplSet"));

?? ?卻沒加MongoConnectionException。 容錯出錯沒有的話，當正在操作時，一個collection打開出錯，不會再重新連接數據庫，
?? ?就報錯了。如果這時能重新連接數據庫，應該能再找到另外正常的節點連接的。



測試環境為： mongodb3.0.3
?? ?2個shard，3個配置config，3個mongos




set?? ??? ?host：port?? ??? ??? ?stateStr?? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ????
------------------------------------------------------------
shard1?? ??? ?192.168.2.188:28011?? ??? ?PRIMARY?? ??? ??? ??? ????
shard1?? ??? ?192.168.2.132:28011?? ??? ?SECONDARY?? ??? ??? ????
shard1?? ??? ?192.168.2.134:28011?? ??? ?SECONDARY?? ??? ??? ????

shard2?? ??? ?192.168.2.188:28012?? ??? ?SECONDARY?? ??? ??? ????
shard2?? ??? ?192.168.2.132:28012?? ??? ?SECONDARY?? ??? ??? ????
shard2?? ??? ?192.168.2.134:28012?? ??? ?PRIMARY?? ??? ??? ??? ????
?? ??? ??? ??? ?



--------------------------------------------------------------------
192.168.2.188:28010?? ??? ?config?? ??? ??? ??? ??? ??? ????
192.168.2.188:28000?? ??? ?mongos?? ??? ??? ??? ??? ??? ????

192.168.2.132:28010?? ??? ?config?? ??? ??? ??? ??? ??? ????
192.168.2.132:28000?? ??? ?mongos?? ??? ??? ??? ??? ??? ????

192.168.2.134:28010?? ??? ?config?? ??? ??? ??? ??? ??? ????
192.168.2.134:28000?? ??? ?mongos?? ??? ??? ??? ??? ????

#備用服務器，當134掛機后，把134 對應的t3 服務器名稱修改為? 135

192.168.2.135:28010?? ??? ?config?? ??? ??? ??? ??? ??? ????


各服務器的hosts 文件：
[root@localhost bin]# cat /etc/hosts
192.168.2.188 t1
192.168.2.132 t2
192.168.2.134 t3

192.168.2.135 t4



一、配置集群：

?? ?初始化replica set shard1
?? ?用mongo 連接其中一個節點： 比如：shard11 執行以下：

?? ?> config = {_id: 'shard1', members: [
?? ??? ??? ??? ??? ??? ??? ??? {_id: 0, host:'t1:28011'}]
?? ??? ??? ??? ?}
?? ?
?? ?> rs.initiate(config);

?? ?rs.add({_id: 1, host:'t2:28011'})
?? ?rs.add({_id: 2, host:'t3:28011'})


?? ?初始化replica set shard2
?? ?用mongo 連接其中一個節點： 比如：shard11 執行以下：

?? ?> config = {_id: 'shard2', members: [
?? ??? ??? ??? ??? ??? ??? ??? {_id: 0, host:'t1:28012'}]
?? ??? ??? ??? ?}
?? ?
?? ?> rs.initiate(config);

?? ?rs.add({_id: 1, host:'t2:28012'})
?? ?rs.add({_id: 2, host:'t3:28012'})

?? ??? ?#遇到如下錯誤
?? ??? ?shard2:PRIMARY> rs.add({_id: 1, host:'t2:28012'})
?? ??? ?{
?? ??? ??? ?"ok" : 0,
?? ??? ??? ?"errmsg" : "Quorum check failed because not enough voting nodes responded; required 2 but only the following 1 voting nodes responded: t1:28012; the following nodes did not respond affirmatively: t2:28012 failed with Failed attempt to connect to t2:28012; couldn't connect to server t2:28012 (192.168.2.132), connection attempt failed",
?? ??? ??? ?"code" : 74
?? ??? ?}
?? ??? ?#原因：有防火墻
?? ??? ?#關閉防火墻
?? ??? ?[root@t2 ~]# chkconfig iptables off
?? ??? ?[root@t2 ~]# service iptables stop
?? ??? ?iptables：清除防火墻規則：???????????????????????????????? [確定]
?? ??? ?iptables：將鏈設置為政策 ACCEPT：nat mangle filter???????? [確定]
?? ??? ?iptables：正在卸載模塊：?????????????????????????????????? [確定]
?? ??? ?[root@t2 ~]#



二、配置分片



?? ?1：配置一下時間一致，不然無法建立分片集群：

?? ?*/5 * * * * /usr/sbin/ntpdate -u ntp.sjtu.edu.cn


?? ?2.mongos 運行時的參數如下：
?? ?/opt/mongodb3.0.3/bin/mongos --configdb t1:28010,t2:28010,t3:28010 --port 28000? --logpath /opt/mongodb3.0.3/logs/mongos.log --logappend --fork


?? ?3.連接到其中一個mongos進程，并切換到admin數據庫做以下配置
?? ? 3.1. 連接到mongs，并切換到admin
?? ? ./mongo 192.168.20.11:28000/admin
?? ? >db
?? ? Admin
?? ? 3.2. 加入shards
?? ? 命令格式：
?? ??? ?replicaSetName/[:port] [,serverhostname2[:port],…]
?? ?
?? ?執行如下：
?? ? >use admin;
?? ? >db.runCommand({addshard:"shard1/t1:28011,t2:28011,t3:28011"});
?? ? >db.runCommand({addshard:"shard2/t1:28012,t2:28012,t3:28012"});

?? ?添加分片后，把chunksize 改成 1M，以方便測試
?? ?>use config
?? ? mongos> db.shards.find()
?? ?{ "_id" : "shard1", "host" : "shard1/t1:28011,t2:28011,t3:28011" }
?? ?{ "_id" : "shard2", "host" : "shard2/t1:28012,t2:28012,t3:28012" }
?? ?mongos> db.settings.find()
?? ?{ "_id" : "chunksize", "value" : 64 }
?? ?mongos> db.settings.update({_id:'chunksize'},{$set:{value:1}})
?? ?WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
?? ?mongos> db.settings.find()
?? ?{ "_id" : "chunksize", "value" : 1 }
?? ?mongos>

?? ?到此分片集群配置已完成


三、添加數據


?? ?db.runCommand({"enablesharding":"test"})
?? ?db.runCommand({shardcollection:"test.customer",key:{_id:1}});

?? ?#表中插入數據：
?? ?use test;
?? ?for (i = 1; i <= 90000; i++){
?? ?db.customer.insert({_id:i,name:' test name test name test name test name test name test name test name test name test name end',
?? ?address:'address test customer al;dkjfa;lsdfjsal;#^end',province:'test customer province',city:'test customer city'});
?? ?}

?? ?用于測試時查看各數據所在的分片。

?? ?從下面的查詢中，可以看到test.customer數據已分片到shard1,shard2

?? ?mongos> db.chunks.find()
?? ?{ "_id" : "test.customer-_id_MinKey", "lastmod" : Timestamp(2, 1), "lastmodEpoch" : ObjectId("55b99f3ff5ddb9333eda7464"), "ns" : "test.customer", "min" : { "_id" : { "$minKey" : 1 } }, "max" : { "_id" : 2 }, "shard" : "shard2" }
?? ?{ "_id" : "test.customer-_id_2.0", "lastmod" : Timestamp(1, 2), "lastmodEpoch" : ObjectId("55b99f3ff5ddb9333eda7464"), "ns" : "test.customer", "min" : { "_id" : 2 }, "max" : { "_id" : 6 }, "shard" : "shard2" }
?? ?{ "_id" : "test.customer-_id_6.0", "lastmod" : Timestamp(2, 2), "lastmodEpoch" : ObjectId("55b99f3ff5ddb9333eda7464"), "ns" : "test.customer", "min" : { "_id" : 6 }, "max" : { "_id" : 2120 }, "shard" : "shard1" }
?? ?{ "_id" : "test.customer-_id_2120.0", "lastmod" : Timestamp(2, 3), "lastmodEpoch" : ObjectId("55b99f3ff5ddb9333eda7464"), "ns" : "test.customer", "min" : { "_id" : 2120 }, "max" : { "_id" : 4579 }, "shard" : "shard1" }
?? ?{ "_id" : "test.customer-_id_4579.0", "lastmod" : Timestamp(2, 5), "lastmodEpoch" : ObjectId("55b99f3ff5ddb9333eda7464"), "ns" : "test.customer", "min" : { "_id" : 4579 }, "max" : { "_id" : 6693 }, "shard" : "shard1" }
?? ?{ "_id" : "test.customer-_id_6693.0", "lastmod" : Timestamp(2, 6), "lastmodEpoch" : ObjectId("55b99f3ff5ddb9333eda7464"), "ns" : "test.customer", "min" : { "_id" : 6693 }, "max" : { "_id" : 9371 }, "shard" : "shard1" }
?? ?{ "_id" : "test.customer-_id_9371.0", "lastmod" : Timestamp(2, 7), "lastmodEpoch" : ObjectId("55b99f3ff5ddb9333eda7464"), "ns" : "test.customer", "min" : { "_id" : 9371 }, "max" : { "_id" : { "$maxKey" : 1 } }, "shard" : "shard1" }
?? ?mongos> db.collections.find()
?? ?{ "_id" : "test.customer", "lastmod" : ISODate("2015-07-30T03:51:28.671Z"), "dropped" : false, "key" : { "_id" : 1 }, "unique" : false, "lastmodEpoch" : ObjectId("55b99f3ff5ddb9333eda7464") }
?? ?mongos>


四、測試掛掉一個config:
?? ?
?? ?4.1

?? ?[mongo@localhost bin]$ ll /opt/mongodb3.0.3/config
?? ?總用量 0
?? ?[mongo@localhost bin]$ ./configd_start.sh
?? ?about to fork child process, waiting until server is ready for connections.
?? ?forked process: 2638
?? ?child process started successfully, parent exiting
?? ?[mongo@localhost bin]$ ps -ef|grep mongod
?? ?mongo???? 2455???? 1 28 10:51 ???????? 00:04:14 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard1.conf
?? ?mongo???? 2518???? 1? 7 10:51 ???????? 00:01:11 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard2.conf
?? ?mongo???? 2638???? 1? 7 10:53 ???????? 00:00:59 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f configsvr.conf
?? ?mongo???? 2931? 2083? 8 11:06 pts/0??? 00:00:00 grep mongod
?? ?[mongo@localhost bin]$ kill -9 2638
?? ?[mongo@localhost bin]$ ps -ef|grep mongod
?? ?mongo???? 2455???? 1 27 10:51 ???????? 00:04:16 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard1.conf
?? ?mongo???? 2518???? 1? 7 10:51 ???????? 00:01:13 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard2.conf
?? ?mongo???? 2941? 2083? 6 11:06 pts/0??? 00:00:00 grep mongod
?? ?[mongo@localhost bin]$



?? ?#t1登錄沒問題
?? ?[mongo@t1 bin]$ ./mongo -port 28000
?? ?MongoDB shell version: 3.0.3
?? ?connecting to: 127.0.0.1:28000/test
?? ?mongos> show dbs;
?? ?admin?? (empty)
?? ?config? (empty)
?? ?test??? 0.002GB
?? ?mongos>
?? ?
?? ?#t2登錄 也沒問題
?? ?[mongo@t2 bin]$ ./mongo -port 28000
?? ?MongoDB shell version: 3.0.3
?? ?connecting to: 127.0.0.1:28000/test
?? ?mongos>

?? ?#同樣，使用mongochef 客戶端登錄，也同樣驗證了上面的問題，


?? ?
?? ?4.2.
?? ?把分片從hostname修改成ip:

?? ??? ?> config = {_id: 'shard1', members: [
?? ??? ??? ??? ??? ??? ??? ??? {_id: 0, host:'192.168.2.188:28011'}]
?? ??? ??? ??? ?}
?? ?
?? ??? ?> rs.initiate(config);

?? ??? ?rs.add({_id: 1, host:'192.168.2.132:28011'})
?? ??? ?rs.add({_id: 2, host:'192.168.2.134:28011'})



?? ??? ?> config = {_id: 'shard2', members: [
?? ??? ??? ??? ??? ??? ??? ??? {_id: 0, host:'192.168.2.188:28012'}]
?? ??? ??? ??? ?}
?? ?
?? ??? ?> rs.initiate(config);

?? ??? ?rs.add({_id: 1, host:'192.168.2.132:28012'})
?? ??? ?rs.add({_id: 2, host:'192.168.2.134:28012'})

?? ??? ?#把mongos 的參數中的hostname也修改成IP

?? ??? ?[mongo@t1 bin]$ cat mongos_router.sh
?? ??? ?/opt/mongodb3.0.3/bin/mongos --configdb 192.168.2.188:28010,192.168.2.132:28010,192.168.2.134:28010 --port 28000? --logpath /opt/mongodb3.0.3/logs/mongos.log --logappend --fork
?? ??? ?[mongo@t1 bin]$

?? ?#添加分片，把chunksize 改成 1M，以方便測試

?? ? >use admin;
?? ? >db.runCommand({addshard:"shard1/192.168.2.188:28011,192.168.2.132:28011,192.168.2.134:28011"});
?? ? >db.runCommand({addshard:"shard2/192.168.2.188:28012,192.168.2.132:28012,192.168.2.134:28012"});

?? ?db.settings.update({_id:'chunksize'},{$set:{value:1}})

?? ?#當所有配置設置成使用IP后，宕掉config server.
?? ?#再從本機嘗試連接，發現不成功。


?? ?[mongo@localhost bin]$ ps -ef|grep mongod
?? ?mongo???? 4062???? 1 10 11:48 ???????? 00:09:56 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard1.conf
?? ?mongo???? 4082???? 1? 8 11:48 ???????? 00:08:09 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard2.conf
?? ?mongo???? 4102???? 1 11 11:48 ???????? 00:10:45 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f configsvr.conf
?? ?mongo???? 4121???? 1? 5 11:49 ???????? 00:04:55 /opt/mongodb3.0.3/bin/mongos --configdb 192.168.2.188:28010,192.168.2.132:28010,192.168.2.134:28010 --logpath /opt/mongodb3.0.3/logs/mongos.log --logappend --fork
?? ?root????? 9459? 9420? 0 13:23 pts/1??? 00:00:00 tail -330f /opt/mongodb3.0.3/logs/shard1.log
?? ?mongo???? 9471? 2083? 5 13:23 pts/0??? 00:00:00 grep mongod
?? ?[mongo@localhost bin]$ kill -9 4102
?? ?[mongo@localhost bin]$ ps -ef|grep mongod
?? ?mongo???? 4062???? 1 10 11:48 ???????? 00:10:20 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard1.conf
?? ?mongo???? 4082???? 1? 8 11:48 ???????? 00:08:18 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard2.conf
?? ?mongo???? 4121???? 1? 5 11:49 ???????? 00:04:59 /opt/mongodb3.0.3/bin/mongos --configdb 192.168.2.188:28010,192.168.2.132:28010,192.168.2.134:28010 --logpath /opt/mongodb3.0.3/logs/mongos.log --logappend --fork
?? ?root????? 9459? 9420? 0 13:23 pts/1??? 00:00:00 tail -330f /opt/mongodb3.0.3/logs/shard1.log
?? ?mongo???? 9488? 2083? 5 13:24 pts/0??? 00:00:00 grep mongod

?? ?[mongo@localhost bin]$ ./mongo -port 28000
?? ?MongoDB shell version: 3.0.3
?? ?connecting to: 127.0.0.1:28000/test
?? ?2015-07-31T13:25:52.166+0800 W NETWORK? Failed to connect to 127.0.0.1:28000, reason: errno:111 Connection refused
?? ?2015-07-31T13:25:53.514+0800 E QUERY??? Error: couldn't connect to server 127.0.0.1:28000 (127.0.0.1), connection attempt failed
?? ??? ?at connect (src/mongo/shell/mongo.js:181:14)
?? ??? ?at (connect):1:6 at src/mongo/shell/mongo.js:181
?? ?exception: connect failed
?? ?[mongo@localhost bin]$ ./mongo -port 28000
?? ?MongoDB shell version: 3.0.3
?? ?connecting to: 127.0.0.1:28000/test
?? ?2015-07-31T13:26:30.823+0800 W NETWORK? Failed to connect to 127.0.0.1:28000, reason: errno:111 Connection refused
?? ?2015-07-31T13:26:32.929+0800 E QUERY??? Error: couldn't connect to server 127.0.0.1:28000 (127.0.0.1), connection attempt failed
?? ??? ?at connect (src/mongo/shell/mongo.js:181:14)
?? ??? ?at (connect):1:6 at src/mongo/shell/mongo.js:181
?? ?exception: connect failed

?? ?[mongo@localhost bin]$ ps -ef|grep mongod
?? ?mongo???? 4062???? 1 12 11:48 ???????? 00:11:48 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard1.conf
?? ?mongo???? 4082???? 1? 8 11:48 ???????? 00:08:29 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard2.conf
?? ?mongo???? 4121???? 1? 5 11:49 ???????? 00:05:09 /opt/mongodb3.0.3/bin/mongos --configdb 192.168.2.188:28010,192.168.2.132:28010,192.168.2.134:28010 --logpath /opt/mongodb3.0.3/logs/mongos.log --logappend --fork
?? ?root????? 9459? 9420? 0 13:23 pts/1??? 00:00:00 tail -330f /opt/mongodb3.0.3/logs/shard1.log
?? ?mongo???? 9754? 2083? 7 13:26 pts/0??? 00:00:00 grep mongod
?? ?[mongo@localhost bin]$ ./mongo -port 28000
?? ?MongoDB shell version: 3.0.3
?? ?connecting to: 127.0.0.1:28000/test
?? ?2015-07-31T13:28:17.397+0800 W NETWORK? Failed to connect to 127.0.0.1:28000, reason: errno:111 Connection refused
?? ?2015-07-31T13:28:19.161+0800 E QUERY??? Error: couldn't connect to server 127.0.0.1:28000 (127.0.0.1), connection attempt failed
?? ??? ?at connect (src/mongo/shell/mongo.js:181:14)
?? ??? ?at (connect):1:6 at src/mongo/shell/mongo.js:181
?? ?exception: connect failed
?? ?[mongo@localhost bin]$

?? ?
?? ?#而其它節點（t2,t1）服務器連接沒有問題。使用mongochef 測試，也印證了這點。
?? ?是否說使用Ip地址，真的是在服務器集群中，穩定性會差一些呢。
?? ?并且我同在宕掉config server. 時，測試循環插入數據的代碼沒有中止。后面也一直在插入數據。


?? ?[mongo@t2 bin]$ ./mongo -port 28000
?? ?MongoDB shell version: 3.0.3
?? ?connecting to: 127.0.0.1:28000/test
?? ?mongos>
?? ?connecting to: 127.0.0.1:28000/test
?? ?mongos> db.customer.count()
?? ?10024
?? ?mongos> db.customer.count()
?? ?10091
?? ?mongos> db.customer.count()
?? ?10103
?? ?mongos>


?? ?可以從下面的日志中看到這點：

?? ??? ?2015-07-31T13:34:55.114+0800 I NETWORK? [LockPinger] trying reconnect to 192.168.2.134:28010 (192.168.2.134) failed
?? ??? ?2015-07-31T13:34:55.328+0800 W NETWORK? [LockPinger] Failed to connect to 192.168.2.134:28010, reason: errno:111 Connection refused
?? ??? ?2015-07-31T13:34:55.383+0800 I WRITE??? [conn258] insert test.customer query: { _id: 11119.0, name: " test name test name test name test name test name test name test name test name test name end", address: "address test customer al;dkjfa;lsdfjsal;#^end", province: "test customer province", city: "test customer city" } ninserted:1 keyUpdates:0 writeConflicts:0 numYields:0 locks:{ Global: { acquireCount: { w: 2 } }, Database: { acquireCount: { w: 2 } }, Collection: { acquireCount: { w: 1 } }, oplog: { acquireCount: { w: 1 } } } 115ms
?? ??? ?2015-07-31T13:34:55.419+0800 I NETWORK? [LockPinger] reconnect 192.168.2.134:28010 (192.168.2.134) failed failed couldn't connect to server 192.168.2.134:28010 (192.168.2.134), connection attempt failed
?? ??? ?2015-07-31T13:34:55.556+0800 I COMMAND? [conn258] command test.$cmd command: insert { insert: "customer", documents: [ { _id: 11119.0, name: " test name test name test name test name test name test name test name test name test name end", address: "address test customer al;dkjfa;lsdfjsal;#^end", province: "test customer province", city: "test customer city" } ], ordered: true, metadata: { shardName: "shard1", shardVersion: [ Timestamp 4000|1, ObjectId('55bb0603bb39501b3b7c2934') ], session: 0 } } ntoreturn:1 keyUpdates:0 writeConflicts:0 numYields:0 reslen:140 locks:{ Global: { acquireCount: { w: 2 } }, Database: { acquireCount: { w: 2 } }, Collection: { acquireCount: { w: 1 } }, oplog: { acquireCount: { w: 1 } } } 312ms
?? ??? ?2015-07-31T13:34:55.618+0800 I NETWORK? [LockPinger] scoped connection to 192.168.2.188:28010,192.168.2.132:28010,192.168.2.134:28010 not being returned to the pool
?? ??? ?2015-07-31T13:34:55.714+0800 W SHARDING [LockPinger] distributed lock pinger '192.168.2.188:28010,192.168.2.132:28010,192.168.2.134:28010/t3:28011:1438320143:660128477' detected an exception while pinging. :: caused by :: SyncClusterConnection::update prepare failed:? 192.168.2.134:28010 (192.168.2.134) failed:9001 socket exception [CONNECT_ERROR] server [192.168.2.134:28010 (192.168.2.134) failed]
?? ??? ?2015-07-31T13:34:55.773+0800 I COMMAND? [conn258] command test.$cmd command: insert { insert: "customer", documents: [ { _id: 11120.0, name: " test name test name test name test name test name test name test name test name test name end", address: "address test customer al;dkjfa;lsdfjsal;#^end", province: "test customer province", city: "test customer city" } ], ordered: true, metadata: { shardName: "shard1", shardVersion: [ Timestamp 4000|1, ObjectId('55bb0603bb39501b3b7c2934') ], session: 0 } } ntoreturn:1 keyUpdates:0 writeConflicts:0 numYields:0 reslen:140 locks:{ Global: { acquireCount: { w: 2 } }, Database: { acquireCount: { w: 2 } }, Collection: { acquireCount: { w: 1 } }, oplog: { acquireCount: { w: 1 } } } 105ms
?? ??? ?2015-07-31T13:34:56.034+0800 I WRITE??? [conn258] insert test.customer query: { _id: 11121.0, name: " test name test name test name test name test name test name test name test name test name end", address: "address test customer al;dkjfa;lsdfjsal;#^end", province: "test customer province", city: "test customer city" } ninserted:1 keyUpdates:0 writeConflicts:0 numYields:0 locks:{ Global: { acquireCount: { w: 2 } }, Database: { acquireCount: { w: 2 } }, Collection: { acquireCount: { w: 1 } }, oplog: { acquireCount: { w: 1 } } } 114ms
?? ??? ?2015-07-31T13:34:56.161+0800 I COMMAND? [conn258] command test.$cmd command: insert { insert: "customer", documents: [ { _id: 11121.0, name: " test name test name test name test name test name test name test name test name test name end", address: "address test customer al;dkjfa;lsdfjsal;#^end", province: "test customer province", city: "test customer city" } ], ordered: true, metadata: { shardName: "shard1", shardVersion: [ Timestamp 4000|1, ObjectId('55bb0603bb39501b3b7c2934') ], session: 0 } } ntoreturn:1 keyUpdates:0 writeConflicts:0 numYields:0 reslen:140 locks:{ Global: { acquireCount: { w: 2 } }, Database: { acquireCount: { w: 2 } }, Collection: { acquireCount: { w: 1 } }, oplog: { acquireCount: { w: 1 } } } 256ms
?? ??? ?2015-07-31T13:34:56.367+0800 I COMMAND? [conn258] command test.$cmd command: insert { insert: "customer", documents: [ { _id: 11122.0, name: " test name test name test name test name test name test name test name test name test name end", address: "address test customer al;dkjfa;lsdfjsal;#^end", province: "test customer province", city: "test customer city" } ], ordered: true, metadata: { shardName: "shard1", shardVersion: [ Timestamp 4000|1, ObjectId('55bb0603bb39501b3b7c2934') ], session: 0 } } ntoreturn:1 keyUpdates:0 writeConflicts:0 numYields:0 reslen:140 locks:{ Global: { acquireCount: { w: 2 } }, Database: { acquireCount: { w: 2 } }, Collection: { acquireCount: { w: 1 } }, oplog: { acquireCount: { w: 1 } } } 110ms


?? ??? ?#重啟config 后，再登錄也出錯。
?? ??? ?可能是本機mongos 已記錄沒找到config ，后再重啟mongos ，全部正常。
?? ??? ?這有點說不過去。

?? ??? ?[mongo@localhost bin]$ ./configd_start.sh
?? ??? ?about to fork child process, waiting until server is ready for connections.
?? ??? ?forked process: 12102
?? ??? ?child process started successfully, parent exiting
?? ??? ?[mongo@localhost bin]$ ./mongo -port 28000
?? ??? ?MongoDB shell version: 3.0.3
?? ??? ?connecting to: 127.0.0.1:28000/test
?? ??? ?2015-07-31T13:46:49.324+0800 W NETWORK? Failed to connect to 127.0.0.1:28000, reason: errno:111 Connection refused
?? ??? ?2015-07-31T13:46:50.747+0800 E QUERY??? Error: couldn't connect to server 127.0.0.1:28000 (127.0.0.1), connection attempt failed
?? ??? ??? ?at connect (src/mongo/shell/mongo.js:181:14)
?? ??? ??? ?at (connect):1:6 at src/mongo/shell/mongo.js:181
?? ??? ?exception: connect failed
?? ??? ?[mongo@localhost bin]$ ps -ef|grep mongod
?? ??? ?mongo???? 4062???? 1 23 11:48 ???????? 00:27:18 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard1.conf
?? ??? ?mongo???? 4082???? 1? 8 11:48 ???????? 00:10:29 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard2.conf
?? ??? ?mongo???? 4121???? 1? 5 11:49 ???????? 00:06:56 /opt/mongodb3.0.3/bin/mongos --configdb 192.168.2.188:28010,192.168.2.132:28010,192.168.2.134:28010 --logpath /opt/mongodb3.0.3/logs/mongos.log --logappend --fork
?? ??? ?root???? 11468? 9420? 0 13:40 pts/1??? 00:00:01 tail -330f /opt/mongodb3.0.3/logs/shard1.log
?? ??? ?mongo??? 12102???? 1 12 13:46 ???????? 00:00:05 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f configsvr.conf
?? ??? ?mongo??? 12190? 2083? 3 13:46 pts/0??? 00:00:00 grep mongod
?? ??? ?[mongo@localhost bin]$ kill -9 4121
?? ??? ?[mongo@localhost bin]$ ./mongos_router.sh
?? ??? ?about to fork child process, waiting until server is ready for connections.
?? ??? ?forked process: 12220
?? ??? ?child process started successfully, parent exiting
?? ??? ?[mongo@localhost bin]$ ps -ef|grep mongod
?? ??? ?mongo???? 4062???? 1 23 11:48 ???????? 00:27:57 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard1.conf
?? ??? ?mongo???? 4082???? 1? 9 11:48 ???????? 00:11:09 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f shard2.conf
?? ??? ?root???? 11468? 9420? 0 13:40 pts/1??? 00:00:01 tail -330f /opt/mongodb3.0.3/logs/shard1.log
?? ??? ?mongo??? 12102???? 1 19 13:46 ???????? 00:00:31 /opt/mongodb3.0.3/bin/mongod --storageEngine wiredTiger -f configsvr.conf
?? ??? ?mongo??? 12220???? 1? 5 13:47 ???????? 00:00:04 /opt/mongodb3.0.3/bin/mongos --configdb 192.168.2.188:28010,192.168.2.132:28010,192.168.2.134:28010 --logpath /opt/mongodb3.0.3/logs/mongos.log --logappend --fork
?? ??? ?mongo??? 12299? 2083? 3 13:48 pts/0??? 00:00:00 grep mongod
?? ??? ?[mongo@localhost bin]$ ./mongo -port 28000
?? ??? ?MongoDB shell version: 3.0.3

??? cfg = rs.conf()
??? cfg.members[0].priority = 2;
??? cfg.members[1].priority = 3;
??? cfg.members[2].priority = 1;
??? rs.reconfig(cfg);

總結

以上是生活随笔為你收集整理的测试一个config server 服务器挂机后，集群是否能读写数据的全部內容，希望文章能夠幫你解決所遇到的問題。

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