99 lines
3.1 KiB
Bash
Executable File
99 lines
3.1 KiB
Bash
Executable File
#!/bin/bash
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CONF=/etc/btrbk/btrbk-cron.conf
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LOCKFILE=/run/btrbk/btrbk.lock
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LOGFILE=$(mktemp)
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trap 'rm -f -- "${LOGFILE}"' EXIT
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echo "---" | tee -a "${LOGFILE}"
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echo "Start btrbk-cron: $(date||true)" | tee -a "${LOGFILE}"
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if [[ ! -f "${CONF}" ]] ; then
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echo "Warning: Can't read config file (${CONF}), healthchecks disabled." | tee -a "${LOGFILE}"
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else
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# shellcheck disable=SC1090,SC1091
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source "${CONF}"
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fi
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HEALTHCHECK_URL=${HEALTHCHECK_URL:-http://127.0.0.1}
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HEALTHCHECK_ENABLE=${HEALTHCHECK_ENABLE:-false}
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FAIL_IF_TARGET_UNREACHABLE=${FAIL_IF_TARGET_UNREACHABLE:-true}
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CURLOPTS=(-fsS -m 10 --retry 5)
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if [[ ! -d /run/btrbk ]] ; then
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echo "Warning: Creating missing directory: /run/btrbk " | tee -a "${LOGFILE}"
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mkdir -p /run/btrbk
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fi
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if [[ "${HEALTHCHECK_ENABLE}" = "true" ]] ; then
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echo "Info: Healthchecks enabled with URL: ${HEALTHCHECK_URL}"
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else
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echo "Info: Healthchecks disabled"
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fi
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if [[ -f "${LOCKFILE}" ]] ; then
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echo "Another instance is still running" | tee -a "${LOGFILE}"
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if [[ "${HEALTHCHECK_ENABLE}" = "true" ]] ; then
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curl "${CURLOPTS[@]}" --data-binary "@${LOGFILE}" "${HEALTHCHECK_URL}/log"
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fi
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rm -f -- "${LOGFILE}"
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exit 0
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fi
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HOST=$(grep -E '^[\ \t]*target[\ \t]+send-receive' /etc/btrbk/btrbk.conf)
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# TODO: support for dashes in hostname and IPv6 ("[2001:db8::7]")
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HOST=$(echo "${HOST}" | sed -r 's/.*ssh:\/\/([0-9\.a-zA-Z]+).*/\1/g' )
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IDENTITYFILE=$(grep -E '^[\ \t]*ssh_identity[\ \t].*' /etc/btrbk/btrbk.conf )
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IDENTITYFILE=$(echo "${IDENTITYFILE}" | sed -r 's/.*ssh_identity[\ \t]+//g')
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SSHUSER=$(grep -E '^[\ \t]*ssh_user[\ \t].*' /etc/btrbk/btrbk.conf )
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SSHUSER=$(echo "${SSHUSER}" | sed -r 's/.*ssh_user[\ \t]+//g')
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SSH_OK=$(ssh -i "${IDENTITYFILE}" "${SSHUSER}@${HOST}" "which btrfs")
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if [[ "${SSH_OK}" = "" ]] ; then
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echo "Warning: exiting because of backup destination unreachable" | tee -a "${LOGFILE}"
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if [[ "${HEALTHCHECK_ENABLE}" = "true" ]] ; then
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curl "${CURLOPTS[@]}" --data-binary "@${LOGFILE}" "${HEALTHCHECK_URL}/log"
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fi
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rm -f -- "${LOGFILE}"
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if [[ "${FAIL_IF_TARGET_UNREACHABLE}" = "true" ]] ; then
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exit 1
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else
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exit 0
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fi
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fi
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echo "Start backup: $(date||true)" | tee -a "${LOGFILE}"
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if [[ "${HEALTHCHECK_ENABLE}" = "true" ]] ; then
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curl "${CURLOPTS[@]}" "${HEALTHCHECK_URL}/start"
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fi
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echo
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echo "healthcheck notified! (start)" | tee -a "${LOGFILE}"
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(nice -n 19 /usr/bin/ionice -c idle /usr/bin/btrbk -v --progress run >> "${LOGFILE}" ; ) 2>&1
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ret=$?
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if [[ "${ret}" -eq "0" ]]; then
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if [[ "${HEALTHCHECK_ENABLE}" = "true" ]] ; then
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curl "${CURLOPTS[@]}" "${HEALTHCHECK_URL}"
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fi
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echo
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echo "healthcheck notified! (ok)" | tee -a "${LOGFILE}"
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else
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if [[ "${HEALTHCHECK_ENABLE}" = "true" ]] ; then
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curl "${CURLOPTS[@]}" "${HEALTHCHECK_URL}/fail"
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fi
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echo
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echo "healthcheck notified! (fail)" | tee -a "${LOGFILE}"
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fi
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echo "starting cleanup" | tee -a "${LOGFILE}"
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(nice -n 19 /usr/bin/ionice -c idle /usr/bin/btrbk clean >> "${LOGFILE}" ; ) 2>&1
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echo "backup finished, sending logs" | tee -a "${LOGFILE}"
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if [[ "${HEALTHCHECK_ENABLE}" = "true" ]] ; then
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curl "${CURLOPTS[@]}" --data-binary "@${LOGFILE}" "${HEALTHCHECK_URL}/log"
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fi
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echo
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rm -f -- "${LOGFILE}"
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echo "backup finished"
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