1.Create a docker network
WhoAmI@WhoAmI:~$ docker network create my-mongo-cluster 2.List all the docker networks
WhoAmI@WhoAmI:~$ docker network ls 3.Execute and create three docker containers setting their names, their network and their image(mongodb)
WhoAmI@WhoAmI:~$ docker run -p 30500:27017 --name container1 --net my-mongo-cluster mongo mongod --replSet my-mongo-set
WhoAmI@WhoAmI:~$ docker run -p 30501:27017 --name container2 --net my-mongo-cluster mongo mongod --replSet my-mongo-set
WhoAmI@WhoAmI:~$ docker run -p 30502:27017 --name container3 --net my-mongo-cluster mongo mongod --replSet my-mongo-set4.Configure container1 as master, the container2 and 3 as slaves on port 27017.
WhoAmI@WhoAmI:~$ config={"_id":"my-mongo-set","members":[{"_id":0,"host":"container1:27017"},{"_id":1,"host":"container2:27017"},{"_id":2,"host":"container3:27017"}]} 5.initialize config
WhoAmI@WhoAmI:~$ rs.initiate(config) 6.map port 27017 so you can acces inside the container
WhoAmI@WhoAmI:~$ docker run -d -p 27017:27017 mongo 1.First of all you must run all the containers
WhoAmI@WhoAmI:~$ docker start container1 container2 container3 2.Now open 3(three) terminals and in each one execute 1(one) container on iterative mode
WhoAmI@WhoAmI:~$ docker exec -it container1 mongo
WhoAmI@WhoAmI:~$ docker exec -it container2 mongo
WhoAmI@WhoAmI:~$ docker exec -it container3 mongo terminal should looks like this:
my-mongo-set:PRIMARY>
my-mongo-set:SECONDARY> 3.On each terminal you should respectively initialize with
db = (new Mongo('container1:27017')).getDB('test')
db = (new Mongo('container2:27017')).getDB('test')
db = (new Mongo('container3:27017')).getDB('test') 4.Now you must set container2 and container3 as slaves
db.setSlaveOk() 5.Now it is ready! Have fun!
-Examples of operations on mongo:
db.Personagens.insert({"nome":'captain america',"raca":'human',"classe":'warrior',"vida":97})
db.Personagens.find()
db.Personagens.find().pretty()
db.Personagens.find().count()
db.Personagens.remove({}) *If you want to use your cluster from outside it, you should use pymongo. The file geraCargaMongoDB.py has clear examples of how to use it!
- Você deve executar com permissões de root
1.Crie uma rede docker
WhoAmI@WhoAmI:~$ docker network create my-mongo-cluster 2.Liste as redes criadas
WhoAmI@WhoAmI:~$ docker network ls 3.Execute e crie os containers setando o nome, a rede utilizada, a aplicacao mongo
WhoAmI@WhoAmI:~$ docker run -p 30500:27017 --name container1 --net my-mongo-cluster mongo mongod --replSet my-mongo-set
WhoAmI@WhoAmI:~$ docker run -p 30501:27017 --name container2 --net my-mongo-cluster mongo mongod --replSet my-mongo-set
WhoAmI@WhoAmI:~$ docker run -p 30502:27017 --name container3 --net my-mongo-cluster mongo mongod --replSet my-mongo-set4.Aqui configure o container1 como mestre, e os dois restantes como escravos na porta 27017, padrao do mongo
WhoAmI@WhoAmI:~$ config={"_id":"my-mongo-set","members":[{"_id":0,"host":"container1:27017"},{"_id":1,"host":"container2:27017"},{"_id":2,"host":"container3:27017"}]} 5.inicialize a configuracao definida
WhoAmI@WhoAmI:~$ rs.initiate(config) 6.mapear a porta 27017 pra que possa acessar a mesma dentro do container
WhoAmI@WhoAmI:~$ docker run -d -p 27017:27017 mongo 1.Primeiramente você deve executar seus containers
WhoAmI@WhoAmI:~$ docker start container1 container2 container3 2.Agora abra 3(três) terminais e em cada um executa 1(um) container no modo iterativo
WhoAmI@WhoAmI:~$ docker exec -it container1 mongo
WhoAmI@WhoAmI:~$ docker exec -it container2 mongo
WhoAmI@WhoAmI:~$ docker exec -it container3 mongo Deve aparecer algo como:
my-mongo-set:PRIMARY>
my-mongo-set:SECONDARY> 3.Em cada um dos terminais respectivamente você deve inicializar com
db = (new Mongo('container1:27017')).getDB('test')
db = (new Mongo('container2:27017')).getDB('test')
db = (new Mongo('container3:27017')).getDB('test') 4.Agora você deve setar o container2 e o container3 como escravos(slave)
db.setSlaveOk() 5.Pronto! divirta-se!
-Exemplos de operações com o mongo:
db.Personagens.insert({"nome":'captain america',"raca":'human',"classe":'warrior',"vida":97})
db.Personagens.find()
db.Personagens.find().pretty()
db.Personagens.find().count()
db.Personagens.remove({}) *Se você deseja usar seu cluster de fora dos containers, utilize o pymongo. no arquivo geraCargaMongoDB.py, tem exemplos claros de como utilizar!