crnetwork

#!/bin/bash
# 
# Author: chris.jenkins@oracle.com
# 
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
# 
# LICENSE UPL 1.0
#
# Copyright (c) 2022 Oracle and/or its affiliates.
# 
# Script to create the custom docker network.
# 

declare -r cfgfilename="container.cfg"
declare -r dflt_nwname="ttnw"
declare -r dflt_v4subnet="10.150.0.0/24"
declare -r dflt_v4gateway="10.150.0.1"
declare -r dflt_v4address="10.150.0.10"
declare -r dflt_v6subnet="2022:1:1:150::/64"
declare -r dflt_v6gateway="2022:1:1:150::1"
declare -r dflt_v6address="2022:1:1:150::10"

declare basedir
declare cfgfile

usage()
{
    echo
    echo "Usage:"
    echo
    echo "    crnetwork"
    echo
    echo "Creates the custom docker network."
    echo
    exit 100
}

loadConfig()
{
    local cfile

    if [[ $# -ne 1 ]]
    then
        return 1
    fi
    cfile="$1"

    if ! source "${cfile}" >& /dev/null
    then
        echo
        echo "error: unable to load configuration from '${cfile}'"
        echo
        return 1
    fi
    if [[ "${DOCKER_NETWORK}" == "" ]]
    then
        export DOCKER_NETWORK="${dflt_nwname}"
    fi
    if [[ "${DOCKER_V4SUBNET}" == "" ]]
    then
        export DOCKER_V4SUBNET="${dflt_v4subnet}"
    fi
    if [[ "${DOCKER_V4GATEWAY}" == "" ]]
    then
        export DOCKER_V4GATEWAY="${dflt_v4gateway}"
    fi
    if [[ "${DOCKER_V4ADDRESS}" == "" ]]
    then
        export DOCKER_V4ADDRESS="${dflt_v4address}"
    fi
    if [[ "${DOCKER_V6SUBNET}" == "" ]]
    then
        export DOCKER_V6SUBNET="${dflt_v6subnet}"
    fi
    if [[ "${DOCKER_V6GATEWAY}" == "" ]]
    then
        export DOCKER_V6GATEWAY="${dflt_v6gateway}"
    fi
    if [[ "${DOCKER_V6ADDRESS}" == "" ]]
    then
        export DOCKER_V6ADDRESS="${dflt_v6address}"
    fi

    return 0
}

if [[ $# -gt 0 ]]
then
    usage
fi

basedir=$(dirname "$0")
cfgfile="${basedir}/${cfgfilename}"
if ! loadConfig "${cfgfile}"
then
    exit 1
fi

if ! docker network create --driver bridge --ipv6 \
       --subnet "${DOCKER_V4SUBNET}" --gateway "${DOCKER_V4GATEWAY}" \
       --subnet "${DOCKER_V6SUBNET}" --gateway "${DOCKER_V6GATEWAY}" \
       "${DOCKER_NETWORK}"
then
    exit 1
fi

exit 0