mirror of
https://github.com/edv-pi/pbs-client-docker.git
synced 2025-04-20 05:52:55 +02:00
64 lines
1.9 KiB
Plaintext
Executable File
64 lines
1.9 KiB
Plaintext
Executable File
#!/usr/bin/with-contenv bash
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# shellcheck shell=bash
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# This script instates the cron job to take regular backups.
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# Define a logging function to prefix output to the docker logs.
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output_to_log() {
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while IFS= read -r line; do
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echo "[cron-backup] $(date +"%Y-%m-%d %H:%M:%S") $line"
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done
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}
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# Redirect all subsequent command outputs to output_to_log
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exec > >(output_to_log)
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# Set up error handling
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handle_error() {
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local exit_code="$?"
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echo -e "Error occurred (Exit code: $exit_code)"
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exit "$exit_code"
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}
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trap handle_error ERR
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validate_cron_expression() {
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local cron_expression="$1"
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# https://stackoverflow.com/a/57639657
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local regex='(@(annually|yearly|monthly|weekly|daily|hourly|reboot))|(@every (\d+(ns|us|µs|ms|s|m|h))+)|((((\d+,)+\d+|(\d+(\/|-)\d+)|\d+|\*) ?){5,7})'
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if echo "$cron_expression" | grep -Pq "$regex"; then
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return 0 # Valid cron expression
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else
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return 1 # Invalid cron expression
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fi
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}
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if ! validate_cron_expression "$CRON_SCHEDULE"; then
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echo -e "Invalid cron expression: $CRON_SCHEDULE \n"
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echo "Please define a valid cron time expression for CRON_SCHEDULE, e.g. \"*/5 * * * *\" "
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sleep 60
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exit 1
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fi
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CRONLOG_FILE="/root/.config/proxmox-backup/cron.log"
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CRON_FILE="/etc/cron.d/cron-backup"
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CRON_LINE="${CRON_SCHEDULE} root bash -c '/etc/s6-overlay/s6-rc.d/backup/run_include' >> $CRONLOG_FILE 2>&1 "
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TIMEOUT=60
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touch "${CRONLOG_FILE}"
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echo "${CRON_LINE}" > "${CRON_FILE}"
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chmod +x "${CRON_FILE}"
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service cron start
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echo "Cron service is now running with: \"${CRON_LINE}\" "
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# We only want new lines added, not existing log content on startup.
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tail -n 0 -f "${CRONLOG_FILE}" &
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# Check if cron service is running
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while :; do
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if ! service cron status > /dev/null; then
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echo "Error: Cron service is not running. Restarting cron."
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exit 1
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fi
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sleep ${TIMEOUT}
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done |