Add a script to manage files probe
Only files that exceeds the modification time.
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@ -0,0 +1,96 @@
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#!/bin/sh
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# Purpose {{{
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## If Xymon server says that a file is in error on a remote host, try to restart the related service.
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## 1. Create a ssh keyring for xymon user {{{
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# sudo mkdir -p -- /var/lib/xymon/.ssh/
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# sudo ssh-keygen -f /var/lib/xymon/.ssh/id_rsa -N '' -q
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# sudo chown -R xymon:xymon /var/lib/xymon/.ssh/
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## }}}
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## 2. Remote user {{{
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# Ensure to have the ${REMOTE_SSH_USER} available on remote hosts and allowed to connect with SSH.
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# Restrict the SSH access to a single SSH key from the Xymon server IP (~${REMOTE_SSH_USER}/.ssh/authorized_keys) :
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## from="IP.SRV.XYM.ON" ssh-rsa AAAAA…
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# Allow sudo commands to restart services (/etc/sudoers.d/xymon-ssh) :
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## xymon-ssh ALL=(root:root) NOPASSWD: /bin/systemctl restart *
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## }}}
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# }}}
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# Vars {{{
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DEBUG=0
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LOCAL_SSH_USER="xymon"
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REMOTE_SSH_USER="xymon-ssh"
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temp_dir=$(mktemp -d -t xymon-files-alert-XXXXXX.tmp)
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debug_stdout="${temp_dir}/debug.stdout"
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debug_stderr="${temp_dir}/debug.stderr"
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file_list="${temp_dir}/services.error.list"
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# }}}
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# Create log files
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touch "${debug_stdout}" "${debug_stderr}"
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# Manage only files probe {{{
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if [ "${BBSVCNAME}" = "files" ]; then
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : ${BBHOSTNAME} — ${BBSVCNAME} error" >> "${debug_stdout}"
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else
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : ${BBHOSTNAME} — ${BBSVCNAME} probe is not managed." >> "${debug_stderr}"
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[ "${DEBUG}" -eq "0" ] || rm -rf -- "${temp_dir}"
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exit 0
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fi
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# }}}
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# Check if a file exceeds it's modification time {{{
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## TODO : Set a better pattern ("File was modified .* ago",…)
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if echo "${BBALPHAMSG}" | grep -qE "\\&yellow <a.*" ; then
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test file — Some services need to be restarted." >> "${debug_stdout}"
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## Get the list of files path
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## TODO : Set a pattern for both yellow and red colors
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echo "${BBALPHAMSG}" | sed -n 's;^\&yellow <a.*>\(.*\)</a>;\1;p' > "${file_list}"
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while IFS= read -r file_path; do
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : while file_path loop — ${file_path} exceeds it's modification time." >> "${debug_stdout}"
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# Match files path and services name {{{
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case "${file_path}" in
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# Cron
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'/var/log/cron.log' )
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service_name="cron"
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;;
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# default
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* )
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service_name="NOT.MANAGED"
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;;
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esac
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# }}}
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# Restart service if needed {{{
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if [ "${service_name}" != "NOT.MANAGED" ] && [ "${service_name}" != "${previous_service_name}" ]; then
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : while file_path loop — ${service_name} need to be restarted." >> "${debug_stdout}"
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : while file_path loop — ssh -n -o StrictHostKeyChecking=no ${REMOTE_SSH_USER}@${BBHOSTNAME} sudo systemctl restart ${service_name}.service" >> "${debug_stdout}"
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#ssh -n -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null "${REMOTE_SSH_USER}"@"${BBHOSTNAME}" "sudo systemctl restart ${service_name}.service" >> "${debug_stdout}" 2>> "${debug_stderr}"
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previous_service_name="${service_name}"
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else
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if [ "${service_name}" = "NOT.MANAGED" ]; then
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : while file_path loop — service for ${file_path} is not managed." >> "${debug_stdout}"
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else
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : while file_path loop — ${service_name} was already restarted." >> "${debug_stdout}"
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fi
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fi
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# }}}
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done < "${file_list}"
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# Also restart xymon-client service {{{
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test service — xymon-client also need to be restarted." >> "${debug_stdout}"
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test service — ssh -n -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ${REMOTE_SSH_USER}@${BBHOSTNAME} sudo systemctl restart xymon-client.service" >> "${debug_stdout}"
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ssh -n -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null "${REMOTE_SSH_USER}"@"${BBHOSTNAME}" "sudo systemctl restart xymon-client.service" >> "${debug_stdout}" 2>> "${debug_stderr}"
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# }}}
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fi
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# }}}
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# Remove empty error file
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[ -s "${debug_stderr}" ] || rm -f "${debug_stderr}"
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# Remove temp_dir if DEBUG is disable
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[ "${DEBUG}" -eq "0" ] || rm -rf -- "${temp_dir}"
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exit 0
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