An idempotent start script for huginn under docker

docker-start-huginn

#!/bin/bash

## these need to be set

# initial account credentials
SEED_USER=admin
SEED_PASS=password

# required for new users to be able to sign up ; default to something random
INVITATION_CODE=`dd if=/dev/urandom bs=1024 count=1 | md5sum -`

# password you want to use for your mysql database
DB_PASS=huginn_mysql_password

# local host:port or just port to bind to
BIND_TO=127.0.0.1:3000


# shouldn't need to change below here

HUGIN_DBENV="-e DATABASE_NAME=huginn_development -e DATABASE_USERNAME=root -e DATABASE_PASSWORD=$DB_PASS -e INVITATION_CODE=$INVITATION_CODE"
HUGIN_SEEDENV="-e SEED_USERNAME=$SEED_USER -e SEED_PASSWORD=$SEED_PASS"

container_exists() {
    `docker inspect -f=x $1 >/dev/null 2>&1`
}

container_running() {
    [ `docker inspect --format '{{ .State.Running }}' $1` = "true" ]
}

if ! container_exists huginn-mysql ; then
    APP_SECRET=${APP_SECRET:-$(docker run --rm andrewcurioso/huginn rake secret)}
    HUGIN_APPENV="-e APP_SECRET_TOKEN=$APP_SECRET"
    # create mysql server
    docker run --name huginn-mysql -e MYSQL_ROOT_PASSWORD=$DB_PASS -d mysql
    # create database
    docker run --rm --link huginn-mysql:db $HUGIN_DBENV $HUGIN_APPENV $HUGIN_SEEDENV andrewcurioso/huginn rake db:create db:migrate db:seed
elif ! container_running huginn-mysql ; then
    docker start huginn-mysql
else
    echo "huginn-mysql already running."
fi

if ! container_exists huginn ; then
    # this can be slow
    APP_SECRET=${APP_SECRET:-$(docker run --rm andrewcurioso/huginn rake secret)}
    HUGIN_APPENV="-e APP_SECRET_TOKEN=$APP_SECRET"
    docker run --name huginn --link huginn-mysql:db $HUGIN_DBENV $HUGIN_APPENV -p ${BIND_TO}:3000 -d andrewcurioso/huginn
elif ! container_running huginn ; then
    docker start huginn
else
    echo "huginn already running."
fi