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mongoDB系列2:分片集群的搭建

发表于 更新于 分类于 阅读次数： Valine：

通过我们了解了mongoDB的分片集群，本文将带大家搭建一个mongoDB的分片集群。

下载

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cd /usr/local/src/
wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-amazon-3.6.6.tgz
tar zxvf mongodb-linux-x86_64-amazon-3.6.6.tgz
mv mongodb-linux-x86_64-amazon-3.6.6 ../
cd ~
ln -s /usr/local/mongodb-linux-x86_64-amazon-3.6.6/ mongo

搭建config集群

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mkdir -p /data/mongodb/config/
cat > /data/mongodb/config.conf <<EOF
sharding:
  clusterRole: configsvr

replication:
  replSetName: configServer
  oplogSizeMB: 2048

net:
  port: 27018
  bindIpAll: true

systemLog:
  destination: file
  logRotate: reopen
  path: /data/mongodb/config.log
  logAppend: true

storage:
  dbPath: /data/mongodb/config/
  journal:
    enabled: false
  directoryPerDB: true

processManagement:
  fork: true
EOF
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cd ~/mongo/bin/
./mongod --config /data/mongodb/config.conf
./mongo localhost:27018/admin
rs.initiate({_id:"configServer",configsvr:true,members:[{_id:0,host:"172.32.220.135:27018"},{_id:1,host:"172.32.210.111:27018"},{_id:2,host:"172.32.210.133:27018"}]})

搭建shard集群

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mkdir -p /data/mongodb/shard1
cat > /data/mongodb/shard1.conf <<EOF
sharding:
  clusterRole: shardsvr

replication:
  replSetName: shard1
  oplogSizeMB: 2048

net:
  port: 27017
  bindIpAll: true

systemLog:
  destination: file
  logRotate: reopen
  path: /data/mongodb/shard1.log
  logAppend: true

storage:
  dbPath: /data/mongodb/shard1/
  journal:
    enabled: false
  directoryPerDB: true

processManagement:
  fork: true

setParameter:
  wiredTigerConcurrentWriteTransactions: 512
EOF
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cd ~/mongo/bin/
./mongod --config /data/mongodb/shard1.conf
./mongo localhost:27017/admin
rs.initiate({_id:"shard1",members:[{_id:0,host:"172.32.220.114:27017"},{_id:1,host:"172.32.220.18:27017"},{_id:2,host:"172.32.210.133:27017",arbiterOnly:true}]})

搭建mongos集群

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mkdir -p /data/mongodb/mongos
cat > /data/mongodb/mongos.conf <<EOF
sharding:
   configDB: configServer/172.32.220.135:27018,172.32.210.111:27018,172.32.210.133:27018

net:
  port: 27019
  bindIpAll: true

systemLog:
  destination: file
  logRotate: reopen
  path: /data/mongodb/mongos.log
  logAppend: true

processManagement:
  fork: true
EOF

添加分片

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cd ~/mongo/bin/
./mongos --config /data/mongodb/mongos.conf
./mongo localhost:27019/admin
sh.addShard("shard1/172.32.220.114:27017");

添加分片有时候会超时，出现
WriteConcernFailed: waiting for replication timed out。
多试几次即可。

删除分片

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db.runCommand({removeShard: "shard3"})

查询分片的副本情况
登录到分片，然后rs.status()

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db.runCommand({"moveprimary":"rtms","to":"shard1"})

新增复制集成员

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rs.add("172.32.220.18:27017");

参考 http://www.mongoing.com/docs/tutorial/expand-replica-set.html

删除复制集成员

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rs.remove("172.32.220.18:27017");

参考 http://www.mongoing.com/docs/tutorial/remove-replica-set-member.html