Docker Notes

docker-notes.sh

# --------------------------------------------------------------------------------------------------------
# BASIC ACTIONS
# -------------------------------------------------------------------------------------------------------

# start up a new machine
docker-machine create --driver virtualbox dev

# list VMs 
docker-machine ps

# setup environment vars for a specific machine - this 'bind' the current terminal to the selected machine.
eval "$(docker-machine env dev)"



# ----------------------------------------------------------------------------------------------------------
# Spin up a Docker + Ubuntu Droplet on Digital Ocean
# ---------------------------------------------------------------------------------------------------------

# Get API key from DO account dashboard first, then: 
docker-machine create --driver digitalocean --digitalocean-access-token <APIKEY> staging  

# Build relationship
eval "$(docker-machine env staging)"


# -------------------------------------------------------------------------------------
# COMMON ERRORS
# --------------------------------------------------------------------------------------

# Error message: 
#  `/var/run/docker.sock: no such file or directory. Are you trying to connect to a 
#  TLS-enabled daemon without TLS?
# Reason: 
#  This is caused by the environment variables which inform the terminal about the container to 
#  manage not being set. The terimanl needs a variable set that looks like 'http://192.168.99.201:2376' 
#  which it sends messages through. When it's not set, no messages can go through! This is exactly the 
#  purpose of eval "$(docker-machine env dev)" ('dev' is simply what we named the container.