mirror of
https://github.com/docker-mailserver/docker-mailserver.git
synced 2025-06-02 01:38:18 +02:00
24031ae365
* added new `_log` function With `_log`, the `_notify` method wa rendered obsolete. `_notify` was not completely removed due to test failures in `check-for-changes.sh`. The new `_log` function properly uses log levels such as `trace`, `debug`, `info`, `warn` and `error`. It provides a cleaner solution and renders `DMS_DEBUG` obsolete too (as only `_notify` depends on it). * converted all helper script to new `_log` function * converted all startup stacks to new `log` function * `start-mailserver.sh` now uses new `_log` function * final test and misc small script adjustments * updated documentation
41 lines
1.3 KiB
Bash
41 lines
1.3 KiB
Bash
#! /bin/bash
|
|
|
|
# This becomes the sourcing script name
|
|
# (example: check-for-changes.sh)
|
|
SCRIPT_NAME="$(basename "$0")"
|
|
# Used inside of lock files to identify them and
|
|
# prevent removal by other instances of docker-mailserver
|
|
LOCK_ID="$(uuid)"
|
|
|
|
function _create_lock
|
|
{
|
|
LOCK_FILE="/tmp/docker-mailserver/${SCRIPT_NAME}.lock"
|
|
while [[ -e "${LOCK_FILE}" ]]
|
|
do
|
|
_log 'warn' "Lock file '${LOCK_FILE}' exists - another execution of '${SCRIPT_NAME}' is happening - trying again shortly"
|
|
# Handle stale lock files left behind on crashes
|
|
# or premature/non-graceful exits of containers while they're making changes
|
|
if [[ -n "$(find "${LOCK_FILE}" -mmin +1 2>/dev/null)" ]]
|
|
then
|
|
_log 'warn' 'Lock file older than 1 minute - removing stale lock file'
|
|
rm -f "${LOCK_FILE}"
|
|
fi
|
|
sleep 5
|
|
done
|
|
trap _remove_lock EXIT
|
|
|
|
_log 'trace' "Creating lock ${LOCK_FILE}"
|
|
echo "${LOCK_ID}" >"${LOCK_FILE}"
|
|
}
|
|
|
|
function _remove_lock
|
|
{
|
|
LOCK_FILE="${LOCK_FILE:-"/tmp/docker-mailserver/${SCRIPT_NAME}.lock"}"
|
|
[[ -z "${LOCK_ID}" ]] && _errex "Cannot remove ${LOCK_FILE} as there is no LOCK_ID set"
|
|
if [[ -e "${LOCK_FILE}" ]] && grep -q "${LOCK_ID}" "${LOCK_FILE}" # Ensure we don't delete a lock that's not ours
|
|
then
|
|
rm -f "${LOCK_FILE}"
|
|
_log 'trace' "Removed lock ${LOCK_FILE}"
|
|
fi
|
|
}
|