docker-mailserver/setup.sh

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#!/bin/bash
# Wrapper for various setup scripts
# included in the docker-mailserver
set -euEo pipefail
trap '_report_err ${_} ${LINENO} ${?}' ERR
function _report_err()
{
echo "ERROR occured :: source ${1} ; line ${2} ; exit code ${3} ;;" >&2
_unset_vars
}
function _unset_vars()
{
unset CDIR CRI INFO IMAGE_NAME CONTAINER_NAME DEFAULT_CONFIG_PATH
unset USE_CONTAINER WISHED_CONFIG_PATH CONFIG_PATH VOLUME USE_TTY
}
function _get_current_directory()
{
if dirname "$(readlink -f "${0}")" &>/dev/null
then
CDIR="$(cd "$(dirname "$(readlink -f "${0}")")" && pwd)"
elif realpath -e -L "${0}" &>/dev/null
then
CDIR="$(realpath -e -L "${0}")"
CDIR="${CDIR%/setup.sh}"
fi
}
CDIR="$(pwd)"
_get_current_directory
CRI=
INFO=
IMAGE_NAME=
CONTAINER_NAME='mail'
DEFAULT_CONFIG_PATH="${CDIR}/config"
USE_CONTAINER=false
WISHED_CONFIG_PATH=
CONFIG_PATH=
VOLUME=
USE_TTY=
function _check_root()
{
if [[ ${EUID} -ne 0 ]]
then
echo "Curently docker-mailserver doesn't support podman's rootless mode, please run this script as root user."
return 1
fi
}
function _update_config_path()
{
if [[ -n ${CONTAINER_NAME} ]]
then
VOLUME=$(${CRI} inspect "${CONTAINER_NAME}" \
--format="{{range .Mounts}}{{ println .Source .Destination}}{{end}}" | \
grep "/tmp/docker-mailserver$" 2>/dev/null)
fi
if [[ -n ${VOLUME} ]]
then
CONFIG_PATH=$(echo "${VOLUME}" | awk '{print $1}')
fi
}
function _inspect()
{
if _docker_image_exists "${IMAGE_NAME}"
then
echo "Image: ${IMAGE_NAME}"
else
echo "Image: '${IMAGE_NAME}' cant be found."
fi
if [[ -n ${CONTAINER_NAME} ]]
then
echo "Container: ${CONTAINER_NAME}"
echo "Config mount: ${CONFIG_PATH}"
else
echo "Container: Not running, please start docker-mailserver."
fi
}
function _usage()
{
echo "Usage: ${0} [-i IMAGE_NAME] [-c CONTAINER_NAME] <subcommand> <subcommand> [args]
OPTIONS:
-i IMAGE_NAME The name of the docker-mailserver image, by default
'tvial/docker-mailserver:latest' for docker, and
'docker.io/tvial/docker-mailserver:latest' for podman.
-c CONTAINER_NAME The name of the running container.
-p PATH config folder path (default: ${CDIR}/config)
SUBCOMMANDS:
email:
${0} email add <email> [<password>]
${0} email update <email> [<password>]
${0} email del <email>
${0} email restrict <add|del|list> <send|receive> [<email>]
${0} email list
alias:
${0} alias add <email> <recipient>
${0} alias del <email> <recipient>
${0} alias list
quota:
${0} quota set <email> [<quota>]
${0} quota del <email>
config:
${0} config dkim <keysize> (default: 2048)
${0} config ssl <fqdn>
relay:
${0} relay add-domain <domain> <host> [<port>]
${0} relay add-auth <domain> <username> [<password>]
${0} relay exclude-domain <domain>
debug:
${0} debug fetchmail
${0} debug fail2ban [<unban> <ip-address>]
${0} debug show-mail-logs
${0} debug inspect
${0} debug login <commands>
"
}
function _docker_image_exists()
{
if ${CRI} history -q "${1}" >/dev/null 2>&1
then
return 0
else
return 1
fi
}
function _docker_image()
{
if ${USE_CONTAINER}
then
# reuse existing container specified on command line
${CRI} exec "${USE_TTY}" "${CONTAINER_NAME}" "${@}"
else
# start temporary container with specified image
if ! _docker_image_exists "${IMAGE_NAME}"
then
echo "Image '${IMAGE_NAME}' not found. Pulling ..."
${CRI} pull "${IMAGE_NAME}"
fi
${CRI} run --rm \
-v "${CONFIG_PATH}":/tmp/docker-mailserver \
"${USE_TTY}" "${IMAGE_NAME}" "${@}"
fi
}
function _docker_container()
{
if [[ -n ${CONTAINER_NAME} ]]
then
${CRI} exec "${USE_TTY}" "${CONTAINER_NAME}" "${@}"
else
echo "The docker-mailserver is not running!"
exit 5
fi
}
function _main()
{
if [[ -n $(command -v docker) ]]
then
CRI=docker
elif [[ -n $(command -v podman) ]]
then
CRI=podman
_check_root
else
echo "No supported Container Runtime Interface detected."
exit 10
fi
INFO=$(${CRI} ps \
--no-trunc \
--format "{{.Image}};{{.Names}}" \
--filter label=org.label-schema.name="docker-mailserver" | \
tail -1)
IMAGE_NAME=${INFO%;*}
CONTAINER_NAME=${INFO#*;}
if [[ -z ${IMAGE_NAME} ]]
then
if [[ ${CRI} == "docker" ]]
then
IMAGE_NAME=tvial/docker-mailserver:latest
elif [[ ${CRI} == "podman" ]]
then
IMAGE_NAME=docker.io/tvial/docker-mailserver:latest
fi
fi
if tty -s
then
USE_TTY="-ti"
fi
local OPTIND
while getopts ":c:i:p:" OPT
do
case ${OPT} in
c) CONTAINER_NAME="${OPTARG}" ; USE_CONTAINER=true ;; # container specified, connect to running instance
i) IMAGE_NAME="${OPTARG}" ;;
p)
case "${OPTARG}" in
/*) WISHED_CONFIG_PATH="${OPTARG}" ;;
* ) WISHED_CONFIG_PATH="${CDIR}/${OPTARG}" ;;
esac
if [[ ! -d ${WISHED_CONFIG_PATH} ]]
then
echo "Directory doesn't exist"
_usage
exit 40
fi
;;
*) echo "Invalid option: -${OPTARG}" >&2 ;;
esac
done
shift $((OPTIND-1))
if [[ -z ${WISHED_CONFIG_PATH} ]]
then
# no wished config path
_update_config_path
if [[ -z ${CONFIG_PATH} ]]
then
CONFIG_PATH=${DEFAULT_CONFIG_PATH}
fi
else
CONFIG_PATH=${WISHED_CONFIG_PATH}
fi
case ${1:-} in
email)
shift ; case ${1:-} in
add ) shift ; _docker_image addmailuser "${@}" ;;
update ) shift ; _docker_image updatemailuser "${@}" ;;
del ) shift ; _docker_image delmailuser "${@}" ;;
restrict ) shift ; _docker_container restrict-access "${@}" ;;
list ) _docker_image listmailuser ;;
* ) _usage ;;
esac
;;
alias)
shift ; case ${1:-} in
add ) shift ; _docker_image addalias "${1}" "${2}" ;;
del ) shift ; _docker_image delalias "${1}" "${2}" ;;
list ) shift ; _docker_image listalias ;;
* ) _usage ;;
esac
;;
quota)
shift ; case ${1:-} in
set ) shift ; _docker_image setquota "${@}" ;;
del ) shift ; _docker_image delquota "${@}" ;;
* ) _usage ;;
esac
;;
config)
shift ; case ${1:-} in
dkim ) _docker_image generate-dkim-config "${2:-2048}" ;;
ssl ) _docker_image generate-ssl-certificate "${2}" ;;
* ) _usage ;;
esac
;;
relay)
shift ; case ${1:-} in
add-domain ) shift ; _docker_image addrelayhost "${@}" ;;
add-auth ) shift ; _docker_image addsaslpassword "${@}" ;;
exclude-domain ) shift ; _docker_image excluderelaydomain "${@}" ;;
* ) _usage ;;
esac
;;
debug)
shift ; case ${1:-} in
fetchmail ) _docker_image debug-fetchmail ;;
fail2ban ) shift ; _docker_container fail2ban "${@}" ;;
show-mail-logs ) _docker_container cat /var/log/mail/mail.log ;;
inspect ) _inspect ;;
login )
shift
if [[ -z ${1:-''} ]]
then
_docker_container /bin/bash
else
_docker_container /bin/bash -c "${@}"
fi
;;
* ) _usage ; _unset_vars ; exit 1 ;;
esac
;;
* ) _usage ; _unset_vars ; exit 1 ;;
esac
_unset_vars
}
_main "${@}"