Mac OS X sudo docker Cannot connect to the Docker daemon. Is the docker daemon running on this host?

Question

I installed docker and there seems to be some issue.

$ docker ps

CONTAINER ID IMAGE COMMAND

Answer 1

You need to set up your shell to use Docker: eval $(docker-machine env default) Where does this command come from? Run docker-machine env default and you'll see something like the following:

$ docker-machine env default
export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.99.100:2376"
export DOCKER_CERT_PATH="/Users/eric/.docker/machine/machines/default"
export DOCKER_MACHINE_NAME="default"
# Run this command to configure your shell: 
# eval $(docker-machine env default)

Also you may or may not have to simply start the Docker host beforehand via: docker-machine start default