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108 lines
4.5 KiB
Bash
Executable File
108 lines
4.5 KiB
Bash
Executable File
#!/bin/bash
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_SCRIPT="$(readlink -f "${0}" 2> /dev/null)"
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# Folders always ends with an tailing '/'
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_CIS_ROOT="${_SCRIPT%%/script/monitor/*}/" #Removes longest matching pattern '/script/monitor/*' from the end
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_DOMAIN="$("${_CIS_ROOT:?"Missing CIS_ROOT"}core/printOwnDomain.sh")"
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_COMPOSITIONS="${_CIS_ROOT:?"Missing CIS_ROOT"}definitions/${_DOMAIN:?"Missing DOMAIN"}/compositions/"
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_REMOTE_HOST="${1:?"FQDN of server missing: e.g. host.example.net[:port]"}"
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_REMOTE_HOSTNAME_FQDN="${_REMOTE_HOST%%:*}" #Removes longest matching pattern ':*' from the end
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_REMOTE_HOSTNAME_SHORT="${_REMOTE_HOSTNAME_FQDN%%.*}" #Removes longest matching pattern '.*' from the end
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_REMOTE_PORT="${_REMOTE_HOST}:"
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_REMOTE_PORT="${_REMOTE_PORT#*:}" #Removes shortest matching pattern '*:' from the begin
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_REMOTE_PORT="${_REMOTE_PORT%%:*}" #Removes longest matching pattern ':*' from the end
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_REMOTE_PORT="${_REMOTE_PORT:-"22"}"
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_REMOTE_USER="monitoring"
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_SOCKET='~/.ssh/%r@%h:%p'
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# This is crucial:
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# - default value for the filter part is extracted from the first parameter (FQDN)
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# - but you can override this part to to adapt the test during a change of the domain.
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# (e.g. the short hostname can be an option - or even a better default in the future)
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_ZFS_SNAPSHOT_FILTER="@SYNC_${2:-"${_REMOTE_HOSTNAME_FQDN:?"Missing REMOTE_HOSTNAME_FQDN"}"}"
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_MODE="${3:-"normal"}"
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_NOW_UTC_UNIXTIME=$(date -u +%s)
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_DEBUG_PATH="/tmp/monitor/"
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function checkOrStartSSHMaster() {
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timeout --preserve-status 1 "ssh -O check -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN}" &> /dev/null \
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&& echo "master checked" \
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&& return 0
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ssh -O stop -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} &> /dev/null
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ssh -o ControlMaster=auto \
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-o ControlPath=${_SOCKET} \
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-o ControlPersist=65 \
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-p ${_REMOTE_PORT} \
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-f ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} exit &> /dev/null \
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&& return 0
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echo "FAIL#SSH connection (setup ok?)"
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return 1
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}
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function checkSync() {
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checkOrStartSSHMaster \
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|| return 1
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[ "${_MODE}" == "debug" ] \
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&& mkdir -p "${_DEBUG_PATH}" > /dev/null \
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&& echo "Now: ${_NOW_UTC_UNIXTIME}" > ${_DEBUG_PATH}SECONDS_BEHIND_${_REMOTE_HOSTNAME_FQDN}.txt
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! [ -d "${_COMPOSITIONS:?"Missing COMPOSITIONS"}" ] \
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&& echo "WARN#no compositions" \
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&& return 0
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[ "${_MODE}" == "debug" ] \
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&& echo "Snapshot filter: ${_ZFS_SNAPSHOT_FILTER}" >> ${_DEBUG_PATH}SECONDS_BEHIND_${_REMOTE_HOSTNAME_FQDN}.txt
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# This retrieves the list of the interesting snapshots including creation timestamp
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_SNAPSHOTS="$(ssh -S ${_SOCKET} -p ${_REMOTE_PORT} ${_REMOTE_USER}@${_REMOTE_HOSTNAME_FQDN} zfs list -po creation,name -r -t snapshot zpool1/persistent | grep -F ${_ZFS_SNAPSHOT_FILTER})"
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[ "${_MODE}" == "debug" ] \
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&& echo "${_SNAPSHOTS}" > ${_DEBUG_PATH}SNAPSHOTS_${_REMOTE_HOSTNAME_FQDN}.txt
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[ -z "${_SNAPSHOTS}" ] \
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&& echo "FAIL#no snapshots" \
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&& return 1
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echo "OK#Checks running"
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for _COMPOSITION_PATH in ${_COMPOSITIONS}*; do
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# If remote host is found than it is responsible for this container-composition, otherwise skip
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# (grep -E "^[[:blank:]]*something" means. Line has to start with "something", leading blank chars are ok.)
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grep -E "^[[:blank:]]*${_REMOTE_HOSTNAME_SHORT}" "${_COMPOSITION_PATH}/zfssync-hosts" &> /dev/null \
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|| continue;
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_COMPOSITION_NAME="${_COMPOSITION_PATH##*/}" #Removes longest matching pattern '*/' from the begin
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_LAST_SNAPSHOT_UNIXTIME="$(echo "${_SNAPSHOTS}" | grep ${_COMPOSITION_NAME} | tail -n 1 | cut -d' ' -f1)"
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_SECONDS_BEHIND=$[ ${_NOW_UTC_UNIXTIME} - ${_LAST_SNAPSHOT_UNIXTIME} ]
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[ "${_MODE}" == "debug" ] \
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&& echo "${_LAST_SNAPSHOT_UNIXTIME} ${_COMPOSITION_NAME} on ${_REMOTE_HOSTNAME_FQDN} behind: ${_SECONDS_BEHIND}s" >> ${_DEBUG_PATH}SECONDS_BEHIND_${_REMOTE_HOSTNAME_FQDN}.txt
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[ "${_SECONDS_BEHIND}" -lt 40 ] \
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&& continue
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[ "${_SECONDS_BEHIND}" -lt 60 ] \
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&& echo "ZFSSYNC_of_${_REMOTE_HOSTNAME_SHORT}_LAGGING?WARN#${_COMPOSITION_NAME} ${_SECONDS_BEHIND}s" \
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&& continue
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echo "ZFSSYNC_of_${_REMOTE_HOSTNAME_SHORT}_LAGGING?FAIL#${_COMPOSITION_NAME} ${_SECONDS_BEHIND}s"
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done
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}
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RESULTS="$(checkSync)"
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[ "${_MODE}" == "debug" ] \
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&& echo "$RESULTS" > ${_DEBUG_PATH}RESULTS_${_REMOTE_HOSTNAME_FQDN}.txt
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echo "$RESULTS"
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