[英]Connect Fiware IoT Agent to sharded MongoDB
I am using to following docker-compose file to setup my sharded MongoDB which has 3 shards, 3 config servers and 2 router instances:我正在使用 docker-compose 文件来设置我的分片 MongoDB,它有 3 个分片、3 个配置服务器和 2 个路由器实例:
version: "3.5"
services:
mongorsn1:
container_name: mongors1n1
hostname: mongors1n1
image: mongo
command: mongod --shardsvr --replSet mongors1 --dbpath /data/db --port 27017
ports:
- 27017:27017
expose:
- "27017"
environment:
TERM: xterm
volumes:
- /etc/localtime:/etc/localtime:ro
- /mongo_cluster/data1:/data/db
mongors1n2:
container_name: mongors1n2
hostname: mongors1n2
image: mongo
command: mongod --shardsvr --replSet mongors1 --dbpath /data/db --port 27017
ports:
- 27027:27017
expose:
- "27017"
environment:
TERM: xterm
volumes:
- /etc/localtime:/etc/localtime:ro
- /mongo_cluster/data2:/data/db
mongors1n3:
container_name: mongors1n3
hostname: mongors1n3
image: mongo
command: mongod --shardsvr --replSet mongors1 --dbpath /data/db --port 27017
ports:
- 27037:27017
expose:
- "27017"
environment:
TERM: xterm
volumes:
- /etc/localtime:/etc/localtime:ro
- /mongo_cluster/data3:/data/db
mongocfg1:
container_name: mongocfg1
image: mongo
command: mongod --configsvr --replSet mongors1conf --dbpath /data/db --port 27017
environment:
TERM: xterm
expose:
- "27017"
volumes:
- /etc/localtime:/etc/localtime:ro
- /mongo_cluster/config1:/data/db
mongocfg2:
container_name: mongocfg2
image: mongo
command: mongod --configsvr --replSet mongors1conf --dbpath /data/db --port 27017
environment:
TERM: xterm
expose:
- "27017"
volumes:
- /etc/localtime:/etc/localtime:ro
- /mongo_cluster/config2:/data/db
mongocfg3:
container_name: mongocfg3
image: mongo
command: mongod --configsvr --replSet mongors1conf --dbpath /data/db --port 27017
environment:
TERM: xterm
expose:
- "27017"
volumes:
- /etc/localtime:/etc/localtime:ro
- /mongo_cluster/config3:/data/db
mongos1:
container_name: mongos1
image: mongo
hostname: mongos1
depends_on:
- mongocfg1
- mongocfg2
command: mongos --configdb mongors1conf/mongocfg1:27017,mongocfg2:27017,mongocfg3:27017 --port 27017
ports:
- 27019:27017
expose:
- "27017"
volumes:
- /etc/localtime:/etc/localtime:ro
mongos2:
container_name: mongos2
image: mongo
hostname: mongos2
depends_on:
- mongocfg1
- mongocfg2
command: mongos --configdb mongors1conf/mongocfg1:27017,mongocfg2:27017,mongocfg3:27017 --port 27017
ports:
- 27020:27017
expose:
- "27017"
volumes:
- /etc/localtime:/etc/localtime:ro
As you can see it is up and running correctly.如您所见,它已启动并正常运行。
docker exec -it mongos1 bash -c "echo 'sh.status()' | mongo "
MongoDB shell version v4.4.6
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("f00e3ac7-e114-40b3-b7f8-0e5cf9c56e10") }
MongoDB server version: 4.4.6
--- Sharding Status ---
sharding version: {
"_id" : 1,
"minCompatibleVersion" : 5,
"currentVersion" : 6,
"clusterId" : ObjectId("609e21145937100b3f006e20")
}
shards:
{ "_id" : "mongors1", "host" : "mongors1/mongors1n1:27017,mongors1n2:27017,mongors1n3:27017", "state" : 1 }
active mongoses:
"4.4.6" : 2
autosplit:
Currently enabled: yes
balancer:
Currently enabled: yes
Currently running: no
Failed balancer rounds in last 5 attempts: 0
Migration Results for the last 24 hours:
No recent migrations
databases:
{ "_id" : "config", "primary" : "config", "partitioned" : true }
bye
Now here is the docker-compose file I use to connect Orion and the IoT Agent to my MongoDB shards.现在这里是 docker-compose 文件,我用于将 Orion 和 IoT 代理连接到我的 MongoDB 分片。
version: "3.5"
services:
orion:
image: atos/smbt/orion:2.5.2
hostname: orion
container_name: orion
restart: unless-stopped
ports:
- "1026:1026"
entrypoint:
- /usr/bin/contextBroker
- -fg
- -multiservice
- -ngsiv1Autocast
- -corsOrigin
- __ALL
command: -dbhost mongors1n1:27017,mongors1n2:27027,mongors1n3:27037 -rplSet mongors1 -logLevel ERROR -noCache
healthcheck:
test: curl --fail -s http://orion:1026/version || exit 1
networks:
- fiware_mongo_sharding_default
iot-agent:
image: atos/smbt/iotagent-ul:1.15.0
hostname: iot-agent
container_name: iot-agent
restart: unless-stopped
expose:
- "4041"
- "7896"
ports:
- "4041:4041"
- "7896:7896"
environment:
- IOTA_CB_HOST=orion
- IOTA_CB_PORT=1026
- IOTA_NORTH_PORT=4041
- IOTA_REGISTRY_TYPE=mongodb
- IOTA_LOG_LEVEL=ERROR
- IOTA_TIMESTAMP=true
- IOTA_CB_NGSI_VERSION=v2
- IOTA_AUTOCAST=true
- IOTA_MONGO_HOST=mongors1n1
- IOTA_MONGO_PORT=27017
- IOTA_MONGO_DB=iotagentul
- IOTA_HTTP_PORT=7896
- IOTA_PROVIDER_URL=http://iot-agent:4041
networks:
- fiware_mongo_sharding_default
networks:
fiware_mongo_sharding_default:
external: true
Orion is connected to MongoDB but with the IoT Agent I get the following error message. Orion 连接到 MongoDB 但使用 IoT 代理时,我收到以下错误消息。
time=2021-05-14T07:51:51.086Z | lvl=ERROR | corr=28202651-30e1-48dc-88a9-53de603e7e6d | trans=28202651-30e1-48dc-88a9-53de603e7e6d | op=IoTAgentNGSI.DbConn | from=n/a | srv=n/a | subsrv=n/a | msg=MONGODB-001: Error trying to connect to MongoDB: MongoNetworkError: failed to connect to server [mongos1:27019] on first connect [MongoNetworkError: connect ECONNREFUSED 172.20.0.9:27019] | comp=IoTAgent
I have tried different things such as:我尝试了不同的方法,例如:
- IOTA_MONGO_HOST=mongos1
- IOTA_MONGO_PORT=27019
but to no avail unfortunately.但不幸的是无济于事。 Is there something I am doing wrong?有什么我做错了吗?
Thanks in advance for your help.在此先感谢您的帮助。
I found the solution myself.我自己找到了解决方案。 What I was doing wrong is that the IoT Agent should be NOT be connected with a Sharded MongoDB as it only expects one Mongo instance.我做错的是物联网代理不应该与分片 MongoDB 连接,因为它只需要一个 Mongo 实例。 That instance is used to persist and retrieve IoT device created when you provision a sensor via the IoT Agent.该实例用于保存和检索通过 IoT 代理配置传感器时创建的 IoT 设备。 Device measurement are sent to the Orion Context Broket which will persist into the Sharded MongoDB.设备测量值被发送到 Orion Context Broket,它将持续到 Sharded MongoDB 中。 Hope it can help somebody else.希望它可以帮助别人。
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