How do I check that a docker host is in swarm mode?

Question

After executing this;

eval $(docker-machine env mymachine)

How do I check if the docker daemon on mymachine is a swarm manager?

Answer 1

You could also use docker info to see the result of Swarm property (inactive or active).

For example:

function isSwarmNode(){
    if [ "$(docker info | grep Swarm | sed 's/Swarm: //g')" == "inactive" ]; then
        echo false;
    else
        echo true;
    fi
}