规划
10个实例:38017-38026 (1)configserver:38018-38020 3台构成的复制集(1主两从,不支持arbiter)38018-38020(复制集名字configsvr) (2)shard节点: sh1:38021-23 (1主两从,其中一个节点为arbiter,复制集名字sh1) sh2:38024-26 (1主两从,其中一个节点为arbiter,复制集名字sh2) (3) mongos: 38017
Shard节点配置过程
目录创建
mkdir -p /mongodb/38021/conf /mongodb/38021/log /mongodb/38021/data mkdir -p /mongodb/38022/conf /mongodb/38022/log /mongodb/38022/data mkdir -p /mongodb/38023/conf /mongodb/38023/log /mongodb/38023/data mkdir -p /mongodb/38024/conf /mongodb/38024/log /mongodb/38024/data mkdir -p /mongodb/38025/conf /mongodb/38025/log /mongodb/38025/data mkdir -p /mongodb/38026/conf /mongodb/38026/log /mongodb/38026/data
修改配置文件
第一组复制集搭建:21-23(1主 1从 1Arb) cat > /mongodb/38021/conf/mongodb.conf <<EOF systemLog: destination: file path: /mongodb/38021/log/mongodb.log logAppend: true storage: journal: enabled: true dbPath: /mongodb/38021/data directoryPerDB: true #engine: wiredTiger wiredTiger: engineConfig: cacheSizeGB: 1 directoryForIndexes: true collectionConfig: blockCompressor: zlib indexConfig: prefixCompression: true net: bindIp: 10.0.0.200,127.0.0.1 port: 38021 replication: oplogSizeMB: 2048 replSetName: sh1 sharding: clusterRole: shardsvr processManagement: fork: true EOF \cp /mongodb/38021/conf/mongodb.conf /mongodb/38022/conf/ \cp /mongodb/38021/conf/mongodb.conf /mongodb/38023/conf/ sed 's#38021#38022#g' /mongodb/38022/conf/mongodb.conf -i sed 's#38021#38023#g' /mongodb/38023/conf/mongodb.conf -i --------------------------- replication: oplogSizeMB: 2048 复制日志的大小 replSetName: sh1 复制集的名称 sharding: clusterRole: shardsvr 集群角色 --------------------------- 第二组复制集搭建:24-26(1主1从1Arb) cat > /mongodb/38024/conf/mongodb.conf <<EOF systemLog: destination: file path: /mongodb/38024/log/mongodb.log logAppend: true storage: journal: enabled: true dbPath: /mongodb/38024/data directoryPerDB: true wiredTiger: engineConfig: cacheSizeGB: 1 directoryForIndexes: true collectionConfig: blockCompressor: zlib indexConfig: prefixCompression: true net: bindIp: 10.0.0.200,127.0.0.1 port: 38024 replication: oplogSizeMB: 2048 replSetName: sh2 sharding: clusterRole: shardsvr processManagement: fork: true EOF \cp /mongodb/38024/conf/mongodb.conf /mongodb/38025/conf/ \cp /mongodb/38024/conf/mongodb.conf /mongodb/38026/conf/ sed 's#38024#38025#g' /mongodb/38025/conf/mongodb.conf -i sed 's#38024#38026#g' /mongodb/38026/conf/mongodb.conf -i
启动所有节点
mongod -f /mongodb/38021/conf/mongodb.conf mongod -f /mongodb/38022/conf/mongodb.conf mongod -f /mongodb/38023/conf/mongodb.conf mongod -f /mongodb/38024/conf/mongodb.conf mongod -f /mongodb/38025/conf/mongodb.conf mongod -f /mongodb/38026/conf/mongodb.conf [mongod@db01 ~]$ ps -ef |grep mongod mongod 4661 1 3 14:30 ? 00:00:00 mongod -f /mongodb/38021/conf/mongodb.conf mongod 4694 1 3 14:30 ? 00:00:00 mongod -f /mongodb/38022/conf/mongodb.conf mongod 4722 1 2 14:30 ? 00:00:00 mongod -f /mongodb/38023/conf/mongodb.conf mongod 4750 1 2 14:30 ? 00:00:00 mongod -f /mongodb/38024/conf/mongodb.conf mongod 4778 1 3 14:30 ? 00:00:00 mongod -f /mongodb/38025/conf/mongodb.conf mongod 4806 1 5 14:30 ? 00:00:00 mongod -f /mongodb/38026/conf/mongodb.conf
搭建复制集
mongo --port 38021 use admin config = {_id: 'sh1', members: [ {_id: 0, host: '10.0.0.200:38021'}, {_id: 1, host: '10.0.0.200:38022'}, {_id: 2, host: '10.0.0.200:38023',"arbiterOnly":true}] } rs.initiate(config) ------------------------------ mongo --port 38024 use admin config = {_id: 'sh2', members: [ {_id: 0, host: '10.0.0.200:38024'}, {_id: 1, host: '10.0.0.200:38025'}, {_id: 2, host: '10.0.0.200:38026',"arbiterOnly":true}] } rs.initiate(config)
config节点配置
目录创建
mkdir -p /mongodb/38018/conf /mongodb/38018/log /mongodb/38018/data mkdir -p /mongodb/38019/conf /mongodb/38019/log /mongodb/38019/data mkdir -p /mongodb/38020/conf /mongodb/38020/log /mongodb/38020/data
修改配置文件
cat > /mongodb/38018/conf/mongodb.conf <<EOF systemLog: destination: file path: /mongodb/38018/log/mongodb.conf logAppend: true storage: journal: enabled: true dbPath: /mongodb/38018/data directoryPerDB: true #engine: wiredTiger wiredTiger: engineConfig: cacheSizeGB: 1 directoryForIndexes: true collectionConfig: blockCompressor: zlib indexConfig: prefixCompression: true net: bindIp: 10.0.0.51,127.0.0.1 port: 38018 replication: oplogSizeMB: 2048 replSetName: configReplSet sharding: clusterRole: configsvr processManagement: fork: true EOF \cp /mongodb/38018/conf/mongodb.conf /mongodb/38019/conf/ \cp /mongodb/38018/conf/mongodb.conf /mongodb/38020/conf/ sed 's#38018#38019#g' /mongodb/38019/conf/mongodb.conf -i sed 's#38018#38020#g' /mongodb/38020/conf/mongodb.conf -i
启动节点
mongod -f /mongodb/38018/conf/mongodb.conf mongod -f /mongodb/38019/conf/mongodb.conf mongod -f /mongodb/38020/conf/mongodb.conf
配置复制集
mongo --port 38018 use admin config = {_id: 'configReplSet', members: [ {_id: 0, host: '10.0.0.51:38018'}, {_id: 1, host: '10.0.0.51:38019'}, {_id: 2, host: '10.0.0.51:38020'}] } rs.initiate(config) 注:configserver 可以是一个节点,官方建议复制集。configserver不能有arbiter。 新版本中,要求必须是复制集。 注:mongodb 3.4之后,虽然要求config server为replica set,但是不支持arbiter
mongos节点配置
创建目录
mkdir -p /mongodb/38017/conf /mongodb/38017/log
配置文件
cat > /mongodb/38017/conf/mongos.conf <<EOF systemLog: destination: file path: /mongodb/38017/log/mongos.log logAppend: true net: bindIp: 10.0.0.51,127.0.0.1 port: 38017 sharding: configDB: configReplSet/10.0.0.51:38018,10.0.0.51:38019,10.0.0.51:38020 processManagement: fork: true EOF
启动mongos
mongos -f /mongodb/38017/conf/mongos.conf
分片集群添加节点
连接到其中一个mongos(10.0.0.200),做以下配置 (1)连接到mongs的admin数据库 su - mongod [mongod@db01 ~]$ mongo 10.0.0.200:38017/admin (2)添加分片 db.runCommand( { addshard : "sh1/10.0.0.200:38021,10.0.0.200:38022,10.0.0.200:38023",name:"shard1"} ) db.runCommand( { addshard : "sh2/10.0.0.200:38024,10.0.0.200:38025,10.0.0.200:38026",name:"shard2"} ) (3)列出分片 mongos> db.runCommand( { listshards : 1 } ) (4)整体状态查看 mongos> sh.status();
使用分片集群
RANGE分片配置及测试
test库下的vast大表进行手工分片 1、激活数据库分片功能 mongo --port 38017 admin 执行命令-开启库的分片功能: mongos> db.runCommand( { enablesharding : "test" } ) 2、指定分片键对集合分片 分片键就是按哪个列进行分片 ### 创建索引 mongos>use test mongos> db.vast.ensureIndex( { id: 1 } ) ### 开启分片 mongos>use admin mongos> db.runCommand( { shardcollection : "test.vast",key : {id: 1} } ) 3、集合分片验证 mongos> use test mongos> for(i=1;i<1000000;i++){ db.vast.insert({"id":i,"name":"shenzheng","age":70,"date":new Date()}); } mongos> db.vast.stats() 分片结果测试 mongo --port 38021 sh1:PRIMARY>use test sh1:PRIMARY> db.vast.count(); 500001 mongo --port 38024 sh2:PRIMARY> use test switched to db test sh2:PRIMARY> db.vast.count(); 499998
Hash分片例子
对oldboy库下的vast大表进行hash 创建哈希索引 (1)对于oldboy开启分片功能 mongo --port 38017 admin use admin admin> db.runCommand( { enablesharding : "oldboy" } ) (2)对于oldboy库下的vast表建立hash索引 use oldboy oldboy> db.vast.ensureIndex( { id: "hashed" } ) (3)开启分片 use admin admin > sh.shardCollection( "oldboy.vast", { id: "hashed" } ) (4)录入10w行数据测试 use oldboy for(i=1;i<100000;i++){ db.vast.insert({"id":i,"name":"shenzheng","age":70,"date":new Date()}); } (5)hash分片结果测试 mongo --port 38021 sh1:PRIMARY> use oldboy switched to db oldboy sh1:PRIMARY> db.vast.count(); 50393 sh2:PRIMARY> use oldboy switched to db oldboy sh2:PRIMARY> db.vast.count(); 49606
分片集群的查询及管理
判断是否Shard集群
mongos> db.runCommand({ isdbgrid : 1})
列出所有分片信息
mongos> db.runCommand({ listshards : 1})
列出开启分片的数据库
mongos> use config mongos> db.databases.find( { "partitioned": true } ) { "_id" : "test", "primary" : "shard2", "partitioned" : true } { "_id" : "oldboy", "primary" : "shard1", "partitioned" : true } 或者: mongos> db.databases.find() //列出所有数据库分片情况
查看分片的片键
config> db.collections.find().pretty() { "_id" : "test.vast", "lastmodEpoch" : ObjectId("58a599f19c898bbfb818b63c"), "lastmod" : ISODate("1970-02-19T17:02:47.296Z"), "dropped" : false, "key" : { "id" : 1 }, "unique" : false }
查看分片的详细信息
sh.status()
删除分片节点(谨慎)
(1)确认blance是否在工作 sh.getBalancerState() (2)删除shard2节点(谨慎) mongos> db.runCommand( { removeShard: "shard2" } ) 注意:删除操作一定会立即触发blancer。