Deploying MongoDB shards using Docker

Create a Configuration service replica set

docker run --name configsvr0 -d mongo:3.6.2-jessie --configsvr --replSet "rs_configsvr"  --bind_ip_alldocker run --name configsvr1 -d mongo:3.6.2-jessie --configsvr --replSet "rs_configsvr"  --bind_ip_alldocker run --name configsvr2 -d mongo:3.6.2-jessie --configsvr --replSet "rs_configsvr"  --bind_ip_all

$ docker psIMAGE                COMMAND                  CREATED             STATUS              PORTS               NAMESmongo:3.6.2-jessie   "docker-entrypoint..."   8 seconds ago       Up 6 seconds        27019/tcp           configsvr2mongo:3.6.2-jessie   "docker-entrypoint..."   9 seconds ago       Up 7 seconds        27019/tcp           configsvr1mongo:3.6.2-jessie   "docker-entrypoint..."   19 seconds ago      Up 16 seconds       27019/tcp           configsvr0

By docker inspect locating the IP of three configuration service instances.
For example docker inspect configsvr0 | grep IPAddress ,
And because --configsvr the default port is 27019. So the address of the configuration service is

• configsvr0:172.17.0.2:27019
• configsvr1:172.17.0.3:27019
• configsvr2:172.17.0.4:27019

Initialization

docker exec -it configsvr0 bashmongo --host 172.17.0.2 --port 27019rs.initiate(  {    _id: "rs_configsvr",    configsvr: true,    members: [      { _id : 0, host : "172.17.0.2:27019" },      { _id : 1, host : "172.17.0.3:27019" },      { _id : 2, host : "172.17.0.4:27019" }    ]  })

The connection string is

mongodb://172.17.0.2:27019,172.17.0.3:27019,172.17.0.4:27019/test?replicaSet=rs_configsvr

Create a shard copy set

The same as above, no longer repeat, directly on the command line.

docker run --name shardsvr00 -d mongo:3.6.2-jessie --shardsvr --replSet "rs_shardsvr0"  --bind_ip_alldocker run --name shardsvr01 -d mongo:3.6.2-jessie --shardsvr --replSet "rs_shardsvr0"  --bind_ip_alldocker run --name shardsvr02 -d mongo:3.6.2-jessie --shardsvr --replSet "rs_shardsvr0"  --bind_ip_alldocker run --name shardsvr10 -d mongo:3.6.2-jessie --shardsvr --replSet "rs_shardsvr1"  --bind_ip_alldocker run --name shardsvr11 -d mongo:3.6.2-jessie --shardsvr --replSet "rs_shardsvr1"  --bind_ip_alldocker run --name shardsvr12 -d mongo:3.6.2-jessie --shardsvr --replSet "rs_shardsvr1"  --bind_ip_all

By docker inspect locating the IP of the corresponding instance.
For example docker inspect shardsvr00 | grep IPAddress ,
And because --shardsvr the default port is 27018. So the address is

• shardsvr00:172.17.0.5:27018
• shardsvr01:172.17.0.6:27018
• shardsvr02:172.17.0.7:27018

由于后来才增加的 shardsvr1，所以 IP 末尾是 9 而不是 8。

• shardsvr10:172.17.0.9:27018
• shardsvr11:172.17.0.10:27018
• shardsvr12:172.17.0.11:27018

$ docker exec -it shardsvr00 bashmongo --host 172.17.0.5 --port 27018> rs.initiate(  {    _id : "rs_shardsvr",    members: [      { _id : 0, host : "172.17.0.5:27018" },      { _id : 1, host : "172.17.0.6:27018" },      { _id : 2, host : "172.17.0.7:27018" }    ]  })# 输出 { "ok" : 1 }

mongo --host 172.17.0.9 --port 27018> rs.initiate(  {    _id : "rs_shardsvr1",    members: [      { _id : 0, host : "172.17.0.9:27018" },      { _id : 1, host : "172.17.0.10:27018" },      { _id : 2, host : "172.17.0.11:27018" }    ]  })

The connection string is

mongodb://172.17.0.5:27018,172.17.0.6:27018,172.17.0.7:27018/test?replicaSet=rs_shardsvr0

mongodb://172.17.0.9:27018,172.17.0.10:27018,172.17.0.11:27018/test?replicaSet=rs_shardsvr1

Connecting MONGOs to a shard cluster

Because the default entry for the mirror is mongod , you want to --entrypoint "mongos" change it to mongos :

docker run --name mongos0 -d --entrypoint "mongos" mongo:3.6.2-jessie --configdb rs_configsvr/172.17.0.2:27019,172.17.0.3:27019,172.17.0.4:27019 --bind_ip_all

Address is172.17.0.8:27017

Adding shards to a cluster

$ docker exec -it mongos bash$ mongo --host 172.17.0.8 --port 27017> sh.addShard("rs_shardsvr0/172.17.0.5:27018,172.17.0.6:27018,172.17.0.7:27018"){    "shardAdded" : "rs_shardsvr",    "ok" : 1,    "$clusterTime" : {        "clusterTime" : Timestamp(1518405986, 8),        "signature" : {            "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),            "keyId" : NumberLong(0)        }    },    "operationTime" : Timestamp(1518405986, 8)}> sh.addShard("rs_shardsvr1/172.17.0.9:27018,172.17.0.10:27018,172.17.0.11:27018")

Database Enable Sharding

> sh.enableSharding("test"){    "ok" : 1,    "$clusterTime" : {        "clusterTime" : Timestamp(1518406101, 8),        "signature" : {            "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),            "keyId" : NumberLong(0)        }    },    "operationTime" : Timestamp(1518406101, 8)}

Shard Collection

test.order _id Hash shards for the field:

> sh.shardCollection("test.order", {"_id": "hashed" }){    "collectionsharded" : "test.order",    "collectionUUID" : UUID("12b22b5d-93d7-4ccf-b989-2a0e550e750f"),    "ok" : 1,    "$clusterTime" : {        "clusterTime" : Timestamp(1518406317, 12),        "signature" : {            "hash" : BinData(0,"AAAAAAAAAAAAAAAAAAAAAAAAAAA="),            "keyId" : NumberLong(0)        }    },    "operationTime" : Timestamp(1518406317, 6)}

Inserting data

use testfor (i = 1; i <= 1000; i=i+1){    db.order.insert({'price': 1})}

View Data distribution

mongos> db.order.find().count()1000rs_shardsvr0:PRIMARY> db.order.find().count()526rs_shardsvr1:PRIMARY> db.order.find().count()474

Deploying MongoDB shards using Docker