Example: db-launch script to launch the Aptible postgresql database image

db-launch.sh

# A script for creating aptible postgres databases in containers
container=$(head -c 32 /dev/urandom | md5);
username=${USERNAME:-aptible};
passphrase=${PASSPHRASE:-password};
dbname=${DATABASE:-db}
cname=${CNAME}
extport=${EXTPORT:-5432}
image="${@: -1}";

# Create a data volume
docker create --name $container $image;

# Initialize the database
docker run --rm \
    --volumes-from $container \
    -e USERNAME=$username \
    -e PASSPHRASE=$passphrase \
    -e DATABASE=$dbname \
    $image --initialize;

# Run the database
cid="$(docker run -d -p $extport:5432 --name $cname --volumes-from $container $@)"

# Rename the data volume to match the database
docker rename $container "$cname-data"