Starts docker-host(aka virtual-box).

docker.sh

# A START DOCKER HOST.
# 1. List all docker-hosts. By default, you shall see `default`, named docker-host.
docker-machine ls 
#NAME      ACTIVE   DRIVER       STATE     URL   SWARM   DOCKER    ERRORS
#default   -        virtualbox   Stopped                 Unknown

# 2. Start your docker-host
docker-machine start default 

#Starting "default"...
#(default) Check network to re-create if needed...
#(default) Waiting for an IP...
#Machine "default" was started.
#Waiting for SSH to be available...
#Detecting the provisioner...
#Started machines may have new IP addresses. You may need to re-run the `docker-machine env` command.

# 3. Run this command to configure your shell: 
 eval "$(docker-machine env default)"

# 4. Running that command resulted in exporting values to env path.
#export DOCKER_TLS_VERIFY="1"
#export DOCKER_HOST="tcp://192.168.99.100:2376"
#export DOCKER_CERT_PATH="/Users/roylee/.docker/machine/machines/default"
#export DOCKER_MACHINE_NAME="default"


# B. VERIFY DOCKER HOST has started.
# 1. To verify if docker-host is up, fire a request via docker-client.
 docker version
 docker ps 
 docker ps -a

# 2. Get the IP address of one or more machines(virtual-box).
# Especially useful when you want to `speak:{http|tcp}` with the daemon-app in container. 
 docker-machine ip default #docker-machine ip <virtual-box-name>
 
# C. DOCKER IMAGE!
# 1. Wrote a Dockerfile? Let's build it! it will become an image.
 docker build -t roylee0704/playdocker .
 
# D. DOCKER CONTAINER!
# Its time to run it. Note: you may spawn as many container as you wish from the same image.

# 1. tty to your container.
 docker run --rm -ti roylee0704/playdocker /bin/bash

# 2. sometimes, you may pass environment variables to CMD["your_app"].
 docker run --rm roylee0704/playdocker -e port=1123