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本文依照 mongodb 网站上的领导教程应用 docker 搭建了一个 shard 集群,仅供学习参考。
有如下目录构造:
.
├── docker-compose.yaml
└── shard-setup
└── setup.sh
其中,docker-compose.yaml
内容如下:
version: "3.8"
services:
mongos-1:
hostname: mongos-1
container_name: mongos-1
image: mongo:5.0.0
entrypoint: /usr/bin/bash /shard-setup/setup.sh
volumes:
- ./shard-setup:/shard-setup
networks:
- mongo-shard-net
restart: on-failure
depends_on:
- cfgrs0-1
- cfgrs0-2
- cfgrs0-3
- dbrs0-1
- dbrs0-2
- dbrs0-3
- dbrs1-1
- dbrs1-2
- dbrs1-3
cfgrs0-1:
hostname: cfgrs0-1
container_name: cfgrs0-1
image: mongo:5.0.0
entrypoint: /usr/bin/mongod --configsvr --replSet "cfgrs0" --bind_ip_all
networks:
- mongo-shard-net
restart: on-failure
expose:
- "27019"
cfgrs0-2:
hostname: cfgrs0-2
container_name: cfgrs0-2
image: mongo:5.0.0
entrypoint: /usr/bin/mongod --configsvr --replSet "cfgrs0" --bind_ip_all
networks:
- mongo-shard-net
restart: on-failure
expose:
- "27019"
cfgrs0-3:
hostname: cfgrs0-3
container_name: cfgrs0-3
image: mongo:5.0.0
entrypoint: /usr/bin/mongod --configsvr --replSet "cfgrs0" --bind_ip_all
networks:
- mongo-shard-net
restart: on-failure
expose:
- "27019"
# 配置 dbrs0 和 dbrs1
dbrs0-1:
hostname: dbrs0-1
container_name: dbrs0-1
image: mongo:5.0.0
entrypoint: /usr/bin/mongod --shardsvr --replSet "dbrs0" --bind_ip_all
networks:
- mongo-shard-net
restart: on-failure
expose:
- "27018"
dbrs0-2:
hostname: dbrs0-2
container_name: dbrs0-2
image: mongo:5.0.0
entrypoint: /usr/bin/mongod --shardsvr --replSet "dbrs0" --bind_ip_all
networks:
- mongo-shard-net
restart: on-failure
expose:
- "27018"
dbrs0-3:
hostname: dbrs0-3
container_name: dbrs0-3
image: mongo:5.0.0
entrypoint: /usr/bin/mongod --shardsvr --replSet "dbrs0" --bind_ip_all
networks:
- mongo-shard-net
restart: on-failure
expose:
- "27018"
dbrs1-1:
hostname: dbrs1-1
container_name: dbrs1-1
image: mongo:5.0.0
entrypoint: /usr/bin/mongod --shardsvr --replSet "dbrs1" --bind_ip_all
networks:
- mongo-shard-net
restart: on-failure
expose:
- "27018"
dbrs1-2:
hostname: dbrs1-2
container_name: dbrs1-2
image: mongo:5.0.0
entrypoint: /usr/bin/mongod --shardsvr --replSet "dbrs1" --bind_ip_all
networks:
- mongo-shard-net
restart: on-failure
expose:
- "27018"
dbrs1-3:
hostname: dbrs1-3
container_name: dbrs1-3
image: mongo:5.0.0
entrypoint: /usr/bin/mongod --shardsvr --replSet "dbrs1" --bind_ip_all
networks:
- mongo-shard-net
restart: on-failure
expose:
- "27018"
networks:
mongo-shard-net:
name: mongo-shard-net
setup.sh
用于设置 config 以及 shard 主从,最初作为 mongos 运行,内容如下:
#/bin/bash
CFGRS0_NAME=cfgrs0
CFGRS0_REPLICA_1=${CFGRS0_NAME}-1
CFGRS0_REPLICA_2=${CFGRS0_NAME}-2
CFGRS0_REPLICA_3=${CFGRS0_NAME}-3
CFGSVR_PORT=27019
DBRS0_NAME=dbrs0
DBRS0_REPLICA_1=${DBRS0_NAME}-1
DBRS0_REPLICA_2=${DBRS0_NAME}-2
DBRS0_REPLICA_3=${DBRS0_NAME}-3
DBRS1_NAME=dbrs1
DBRS1_REPLICA_1=${DBRS1_NAME}-1
DBRS1_REPLICA_2=${DBRS1_NAME}-2
DBRS1_REPLICA_3=${DBRS1_NAME}-3
DBSVR_PORT=27018
until mongosh --host ${CFGRS0_REPLICA_1} --port ${CFGSVR_PORT} <<EOF
exit
EOF
do
sleep 5
done
mongosh --host ${CFGRS0_REPLICA_1} --port ${CFGSVR_PORT} <<EOF
rs.initiate(
{_id: "${CFGRS0_NAME}",
configsvr: true,
members: [{ _id : 0, host : "${CFGRS0_REPLICA_1}:${CFGSVR_PORT}", priority: 2 },
{_id : 1, host : "${CFGRS0_REPLICA_2}:${CFGSVR_PORT}", priority: 1 },
{_id : 2, host : "${CFGRS0_REPLICA_3}:${CFGSVR_PORT}", priority: 1 }
]
}
)
EOF
for rs in 0 1
do
until mongosh --host `eval echo '$'{DBRS"${rs}"_REPLICA_1}` --port ${DBSVR_PORT} <<EOF
exit
EOF
do
sleep 5
done
mongosh --host `eval echo '$'{DBRS"${rs}"_REPLICA_1}` --port ${DBSVR_PORT} <<EOF
rs.initiate(
{_id: "eval echo'$'{DBRS"${rs}"_NAME}",
members: [{ _id : 0, host : "`eval echo'$'{DBRS"${rs}"_REPLICA_1}`:${DBSVR_PORT}", priority: 2 },
{_id : 1, host : "`eval echo'$'{DBRS"${rs}"_REPLICA_2}`:${DBSVR_PORT}", priority: 1 },
{_id : 2, host : "`eval echo'$'{DBRS"${rs}"_REPLICA_3}`:${DBSVR_PORT}", priority: 1 }
]
}
)
EOF
done
mongos --configdb ${CFGRS0_NAME}/${CFGRS0_REPLICA_1}:${CFGSVR_PORT},\
${CFGRS0_REPLICA_2}:${CFGSVR_PORT},${CFGRS0_REPLICA_3}:${CFGSVR_PORT} \
--bind_ip_all
应用 docker-compose up
即可启动集群,应用 docker-compose down --volumes
即可进行集群。
PS:仅应用 docker-compose down
可能会以致磁盘空间一直减小,每次挂载的 volume 在 /var/lib/docker
目录下会越积越多。
正文完