mirror of
https://github.com/willfarrell/docker-crontab.git
synced 2025-04-08 16:05:14 +02:00
264 lines
8.1 KiB
Bash
Executable File
264 lines
8.1 KiB
Bash
Executable File
#!/bin/bash
|
|
|
|
set -e
|
|
|
|
DOCKER_SOCK=/var/run/docker.sock
|
|
CRONTAB_FILE=/etc/crontabs/docker
|
|
|
|
if [ -z "${HOME_DIR}" ] && [ -n "${TEST_MODE}" ]; then
|
|
HOME_DIR=/tmp/crontab-docker-testing
|
|
CRONTAB_FILE=${HOME_DIR}/test
|
|
elif [ -z "${HOME_DIR}" ]; then
|
|
echo "HOME_DIR not set."
|
|
exit 1
|
|
fi
|
|
|
|
# Ensure dir exist - in case of volume mapping.
|
|
mkdir -p "${HOME_DIR}"/jobs
|
|
|
|
if [ -z "${DOCKER_HOST}" ] && [ -a "${DOCKER_PORT_2375_TCP}" ]; then
|
|
export DOCKER_HOST="tcp://docker:2375"
|
|
fi
|
|
|
|
normalize_config() {
|
|
JSON_CONFIG={}
|
|
if [ -f "${HOME_DIR}/config.json" ]; then
|
|
JSON_CONFIG="$(cat "${HOME_DIR}"/config.json)"
|
|
elif [ -f "${HOME_DIR}/config.toml" ]; then
|
|
JSON_CONFIG="$(rq -t <<< "$(cat "${HOME_DIR}"/config.toml)")"
|
|
elif [ -f "${HOME_DIR}/config.yml" ]; then
|
|
JSON_CONFIG="$(rq -y <<< "$(cat "${HOME_DIR}"/config.yml)")"
|
|
elif [ -f "${HOME_DIR}/config.yaml" ]; then
|
|
JSON_CONFIG="$(rq -y <<< "$(cat "${HOME_DIR}"/config.yaml)")"
|
|
fi
|
|
|
|
jq -S -r '."~~shared-settings" as $shared | del(."~~shared-settings") | to_entries | map_values(.value + { name: .key } + $shared)' <<< "${JSON_CONFIG}" > "${HOME_DIR}"/config.working.json
|
|
}
|
|
|
|
ensure_docker_socket_accessible() {
|
|
if ! grep -q "^docker:" /etc/group; then
|
|
# Ensure 'docker' user has permissions for docker socket (without changing permissions).
|
|
DOCKER_GID=$(stat -c '%g' ${DOCKER_SOCK})
|
|
if [ "${DOCKER_GID}" != "0" ]; then
|
|
if ! grep -qE "^[^:]+:[^:]+:${DOCKER_GID}:" /etc/group; then
|
|
# No group with such gid exists - create group 'docker'.
|
|
addgroup -g "${DOCKER_GID}" docker
|
|
adduser docker docker
|
|
else
|
|
# Group with such gid exists - add user 'docker' to this group.
|
|
DOCKER_GROUP_NAME=$(getent group "${DOCKER_GID}" | awk -F':' '{{ print $1 }}')
|
|
adduser docker "${DOCKER_GROUP_NAME}"
|
|
fi
|
|
else
|
|
# Docker socket belongs to 'root' group - add user 'docker' to this group.
|
|
adduser docker root
|
|
fi
|
|
fi
|
|
}
|
|
|
|
slugify() {
|
|
echo "${@}" | iconv -t ascii | sed -r s/[~^]+//g | sed -r s/[^a-zA-Z0-9]+/-/g | sed -r s/^-+\|-+$//g | tr '[:upper:]' '[:lower:]'
|
|
}
|
|
|
|
make_image_cmd() {
|
|
DOCKERARGS=$(echo "${1}" | jq -r .dockerargs)
|
|
ENVIRONMENT=$(echo "${1}" | jq -r 'select(.environment != null) | .environment | map("--env " + .) | join(" ")')
|
|
EXPOSE=$(echo "${1}" | jq -r 'select(.expose != null) | .expose | map("--expose " + .) | join(" ")' )
|
|
NAME=$(echo "${1}" | jq -r 'select(.name != null) | .name')
|
|
NETWORKS=$(echo "${1}" | jq -r 'select(.networks != null) | .networks | map("--network " + .) | join(" ")')
|
|
PORTS=$(echo "${1}" | jq -r 'select(.ports != null) | .ports | map("--publish " + .) | join(" ")')
|
|
VOLUMES=$(echo "${1}" | jq -r 'select(.volumes != null) | .volumes | map("--volume " + .) | join(" ")')
|
|
|
|
if [ "${DOCKERARGS}" == "null" ]; then DOCKERARGS=; fi
|
|
DOCKERARGS+=" "
|
|
if [ -n "${ENVIRONMENT}" ]; then DOCKERARGS+="${ENVIRONMENT} "; fi
|
|
if [ -n "${EXPOSE}" ]; then DOCKERARGS+="${EXPOSE} "; fi
|
|
if [ -n "${NAME}" ]; then DOCKERARGS+="--name ${NAME} "; fi
|
|
if [ -n "${NETWORKS}" ]; then DOCKERARGS+="${NETWORKS} "; fi
|
|
if [ -n "${PORTS}" ]; then DOCKERARGS+="${PORTS} "; fi
|
|
if [ -n "${VOLUMES}" ]; then DOCKERARGS+="${VOLUMES} "; fi
|
|
|
|
IMAGE=$(echo "${1}" | jq -r .image | envsubst)
|
|
if [ "${IMAGE}" == "null" ]; then return; fi
|
|
|
|
COMMAND=$(echo "${1}" | jq -r .command)
|
|
|
|
echo "docker run ${DOCKERARGS} ${IMAGE} ${COMMAND}"
|
|
}
|
|
|
|
make_container_cmd() {
|
|
DOCKERARGS=$(echo "${1}" | jq -r .dockerargs)
|
|
if [ "${DOCKERARGS}" == "null" ]; then DOCKERARGS=; fi
|
|
|
|
CONTAINER=$(echo "${1}" | jq -r .container | envsubst)
|
|
if [ "${CONTAINER}" == "null" ]; then return; fi
|
|
|
|
COMMAND=$(echo "${1}" | jq -r .command )
|
|
if [ "${COMMAND}" == "null" ]; then return; fi
|
|
|
|
echo "docker exec ${DOCKERARGS} ${CONTAINER} ${COMMAND}"
|
|
}
|
|
|
|
make_cmd() {
|
|
if [ "$(echo "${1}" | jq -r .image)" != "null" ]; then
|
|
make_image_cmd "${1}"
|
|
elif [ "$(echo "${1}" | jq -r .container)" != "null" ]; then
|
|
make_container_cmd "${1}"
|
|
else
|
|
echo "${1}" | jq -r .command
|
|
fi
|
|
}
|
|
|
|
parse_schedule() {
|
|
IFS=" "
|
|
read -a params <<< "$@"
|
|
|
|
case ${params[0]} in
|
|
"@yearly" | "@annually")
|
|
echo "0 0 1 1 *"
|
|
;;
|
|
"@monthly")
|
|
echo "0 0 1 * *"
|
|
;;
|
|
"@weekly")
|
|
echo "0 0 * * 0"
|
|
;;
|
|
"@daily")
|
|
echo "0 0 * * *"
|
|
;;
|
|
"@midnight")
|
|
echo "0 0 * * *"
|
|
;;
|
|
"@hourly")
|
|
echo "0 * * * *"
|
|
;;
|
|
"@random")
|
|
M="*"
|
|
H="*"
|
|
D="*"
|
|
|
|
for when in "${params[@]:1}"
|
|
do
|
|
case $when in
|
|
"@m")
|
|
M=$(shuf -i 0-59 -n 1)
|
|
;;
|
|
"@h")
|
|
H=$(shuf -i 0-23 -n 1)
|
|
;;
|
|
"@d")
|
|
D=$(shuf -i 0-6 -n 1)
|
|
;;
|
|
esac
|
|
done
|
|
|
|
echo "${M} ${H} * * ${D}"
|
|
;;
|
|
*)
|
|
echo "${params[@]}"
|
|
;;
|
|
esac
|
|
}
|
|
|
|
function build_crontab() {
|
|
rm -rf "${CRONTAB_FILE}"
|
|
|
|
ONSTART=()
|
|
while read -r i ; do
|
|
KEY=$(jq -r .["$i"] "${CONFIG}")
|
|
|
|
SCHEDULE=$(echo "${KEY}" | jq -r '.schedule' | sed 's/\*/\\*/g')
|
|
if [ "${SCHEDULE}" == "null" ]; then
|
|
echo "'schedule' missing: '${KEY}"
|
|
continue
|
|
fi
|
|
SCHEDULE=$(parse_schedule "${SCHEDULE}" | sed 's/\\//g')
|
|
|
|
COMMAND=$(echo "${KEY}" | jq -r '.command')
|
|
if [ "${COMMAND}" == "null" ]; then
|
|
echo "'command' missing: '${KEY}'"
|
|
continue
|
|
fi
|
|
|
|
COMMENT=$(echo "${KEY}" | jq -r '.comment')
|
|
|
|
SCRIPT_NAME=$(echo "${KEY}" | jq -r '.name')
|
|
SCRIPT_NAME=$(slugify "${SCRIPT_NAME}")
|
|
if [ "${SCRIPT_NAME}" == "null" ]; then
|
|
SCRIPT_NAME=$(cat /proc/sys/kernel/random/uuid)
|
|
fi
|
|
|
|
CRON_COMMAND=$(make_cmd "${KEY}")
|
|
|
|
SCRIPT_PATH="${HOME_DIR}/jobs/${SCRIPT_NAME}.sh"
|
|
|
|
touch "${SCRIPT_PATH}"
|
|
chmod +x "${SCRIPT_PATH}"
|
|
|
|
{
|
|
echo "#\!/usr/bin/env bash"
|
|
echo "set -e"
|
|
echo ""
|
|
echo "echo \"start cron job __${SCRIPT_NAME}__\""
|
|
echo "${CRON_COMMAND}"
|
|
} > "${SCRIPT_PATH}"
|
|
|
|
TRIGGER=$(echo "${KEY}" | jq -r '.trigger')
|
|
if [ "${TRIGGER}" != "null" ]; then
|
|
while read -r j ; do
|
|
TRIGGER_KEY=$(echo "${KEY}" | jq -r .trigger["$j"])
|
|
|
|
TRIGGER_COMMAND=$(echo "${TRIGGER_KEY}" | jq -r '.command')
|
|
if [ "${TRIGGER_COMMAND}" == "null" ]; then
|
|
continue
|
|
fi
|
|
|
|
make_cmd "${TRIGGER_KEY}" >> "${SCRIPT_PATH}"
|
|
done < <(echo "${KEY}" | jq -r '.trigger | keys[]')
|
|
fi
|
|
|
|
echo "echo \"end cron job __${SCRIPT_NAME}__\"" >> "${SCRIPT_PATH}"
|
|
|
|
if [ "${COMMENT}" != "null" ]; then
|
|
echo "# ${COMMENT}" >> "${CRONTAB_FILE}"
|
|
fi
|
|
echo "${SCHEDULE} ${SCRIPT_PATH}" >> "${CRONTAB_FILE}"
|
|
|
|
ONSTART_COMMAND=$(echo "${KEY}" | jq -r '.onstart')
|
|
if [ "${ONSTART_COMMAND}" == "true" ]; then
|
|
ONSTART+=("${SCRIPT_PATH}")
|
|
fi
|
|
done < <(jq -r '. | keys[]' "${CONFIG}")
|
|
|
|
printf "##### crontab generated #####\n"
|
|
cat "${CRONTAB_FILE}"
|
|
|
|
printf "##### run commands with onstart #####\n"
|
|
for ONSTART_COMMAND in "${ONSTART[@]}"; do
|
|
printf "%s\n" "${ONSTART_COMMAND}"
|
|
${ONSTART_COMMAND} &
|
|
done
|
|
|
|
printf "##### cron running #####\n"
|
|
}
|
|
|
|
start_app() {
|
|
normalize_config
|
|
export CONFIG=${HOME_DIR}/config.working.json
|
|
if [ ! -f "${CONFIG}" ]; then
|
|
printf "missing generated %s. exiting.\n" "${CONFIG}"
|
|
exit 1
|
|
fi
|
|
if [ "${1}" == "crond" ]; then
|
|
build_crontab
|
|
fi
|
|
printf "%s\n" "${@}"
|
|
exec "${@}"
|
|
}
|
|
|
|
if [ -z "${TEST_MODE}" ]; then
|
|
ensure_docker_socket_accessible
|
|
fi
|
|
printf "✨ starting crontab container ✨\n"
|
|
start_app "${@}"
|