106 lines
5.3 KiB
Bash
Executable File
106 lines
5.3 KiB
Bash
Executable File
#!/bin/sh
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# Purpose {{{
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## If Xymon server says that a service is in error on a remote host, try to
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## restart this 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 ${REMOTE_SSH_USER} available on remote hosts and allowed
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# to connect with SSH.
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# Restrict the SSH access to a single SSH key from the Xymon server IP
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# (~${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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## 3. Xymon Configuration {{{
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# PROC monitoring need to display the real service name in it's description :
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## PROC %^/sbin/rpcbind MIN=1 MAX=1 COLOR=red "TEXT=rpcbind"
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# You can add more information about this proc if you an underscore "_" :
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## PROC %^/usr/sbin/rpc.idmapd MIN=1 MAX=1 COLOR=red "TEXT=NFS-server_rpc.idmapd"
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## This way, the script will only take the text before the underscore "_" as the
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## service name to be restarted.
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# Don't add whitespaces in the description of a process.
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## }}}
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# }}}
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# Vars {{{
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DEBUG=1
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temp_dir=$(mktemp -d -t xymon-procs-alert-XXXXXX.tmp)
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debug_stdout="${temp_dir}/debug.stdout"
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debug_stderr="${temp_dir}/debug.stderr"
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service_list="${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 procs probe {{{
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if [ "${BBSVCNAME}" = "procs" ]; then
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[ "${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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# Get the list of processes with an error
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echo "${BBALPHAMSG}" | grep -E "&(red|yellow)" | cut -d" " -f2- | tr '[:upper:]' '[:lower:]' > "${service_list}"
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# If any error on a process
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if [ -s "${service_list}" ]; then
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : process list — Some processes seems to be in error." >> "${debug_stdout}"
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while IFS= read -r line; do
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## Pattern "req. between" {{{
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if echo "${line}" | grep -q -E -- ".* \\(found .*, req. between .* and .*\\)" ; then
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : while process loop — Pattern \"req. between\"." >> "${debug_stdout}"
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service_name="$(echo "${line}" | cut -d" " -f1 | sed 's/_.*//')"
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process_found="$(echo "${line}" | cut -d" " -f3 | tr -d ',')"
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process_min="$(echo "${line}" | cut -d" " -f6)"
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process_max="$(echo "${line}" | cut -d" " -f8 | tr -d ')')"
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fi
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## }}}
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## Pattern "req. .* or more" {{{
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if echo "${line}" | grep -q -E -- ".* \\(found .*, req. .* or more\\)" ; then
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : while process loop — Pattern \"req. .* or more\"." >> "${debug_stdout}"
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service_name="$(echo "${line}" | cut -d" " -f1 | sed 's/_.*//')"
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process_found="$(echo "${line}" | cut -d" " -f3 | tr -d ',')"
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process_min="$(echo "${line}" | cut -d" " -f5)"
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process_max="nolimit"
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fi
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## }}}
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : while process loop — Found ${process_found} process(es) for ${service_name} service and require between ${process_min} and ${process_max}." >> "${debug_stdout}"
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# Restart service if needed {{{
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if [ "${process_found}" ] && [ "${process_min}" ] && [ "${process_found}" -lt "${process_min}" ]; then
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : while process 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 process loop — ssh -n -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ${REMOTE_SSH_USER}@${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>> "${debug_stderr}"
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else
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : while process loop — ${service_name} service is not managed." >> "${debug_stdout}"
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fi
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# }}}
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done < "${service_list}"
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# Also restart xymon-client service {{{
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : process list — 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 : process list — 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>> "${debug_stderr}"
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# }}}
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else
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : process list — No error on any process." >> "${debug_stdout}"
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fi
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# Remove empty error file
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[ -s "${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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