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Let's say I have 3 separate machines:

redis$ docker-machine ls
NAME           ACTIVE   DRIVER       STATE     URL                         SWARM   DOCKER    ERRORS
redis-master   *        virtualbox   Running   tcp://192.168.99.101:2376           v1.10.1   
redis-slave1   -        virtualbox   Running   tcp://192.168.99.102:2376           v1.10.1   
redis-slave2   -        virtualbox   Running   tcp://192.168.99.103:2376           v1.10.1

I want to use docker-compose to easily deploy master or slave to one of those three machines. For now my docker-compose.yml file looks like this:

redis:
  image: redis:3.0
sentinel:
  image: redis:3.0
  command: "redis-server --sentinel"

How should I modify my docker-compose.yml file to make it work? At the end I would like to be able to start containers like this for example:

$ NODE_ROLE=master docker-compose up # on master machine
$ NODE_ROLE=slave MASTER_ADDRESS=192.168.99.101:2376 docker-compose up # on slave machine 1
$ NODE_ROLE=slave MASTER_ADDRESS=192.168.99.101:2376 docker-compose up # on slave machine 2

I saw some repositories with redis + docker + sentinel setup, but all of them run all instances on same docker host...

user606521
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1 Answers1

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I think you should look into using https://github.com/docker/swarm

Swarm allows you to treat multiple machines as a single docker engine. You can then let the swarm scheduler decide where to run the container, or use a constraint to put the container on a specific node.

dnephin
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