mirror of
https://github.com/jooray/signal-monitoring.git
synced 2026-01-27 00:43:41 +00:00
134 lines
3.8 KiB
Bash
Executable File
134 lines
3.8 KiB
Bash
Executable File
#!/bin/bash
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# if you need to add something to path:
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#PATH=$PATH:/path/to/java:/path/to/signal-cli
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# for some cases you should explicitly specify JAVA_HOME in
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# order for signal-cli to work
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#export JAVA_HOME=/var/packages/Java8/target/j2sdk-image/jre
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# username of the sending entity (phone number in international format)
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SIGNAL_USER="+1123123123123"
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# phone number of the user that receives the notification
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NOTIFY_NUMBER="+132132132132"
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# now go to the bottom of the script and specify the checks
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export LC_ALL="en_US.utf8" # This makes emojis work - an UTF-8 locale
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mkdir -p ~/.signal-monitoring && cd ~/.signal-monitoring
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function log {
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echo $(date "+%Y-%m-%d %H:%M:%S: ") "$1" >> ~/.signal-monitoring/log
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}
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# arguments: notify_text
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function notify {
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echo "$1" | signal-cli -u "${SIGNAL_USER}" send "${NOTIFY_NUMBER}" > /dev/null
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log "Sending notification ${1}"
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}
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# arguments: check_name description
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function check_passed {
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check_name="$1"
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description="$2"
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check_filename="${check_name}-error"
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log "check_passed ${check_name} ${description}"
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if [ -f "${check_filename}" ]
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then
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rm -f "${check_filename}"
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notify "✅ ${description}"
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fi
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}
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# arguments: check_name description
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function check_failed {
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check_name="$1"
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description="$2"
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check_filename="${check_name}-error"
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log "check_failed ${check_name} ${description}"
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FOUND=`find ~/.signal-monitoring -mmin -60 -name "${check_filename}" -not -empty -print`
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if [ -z "$FOUND" ]
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then # we don't have recent notification (60 minutes)
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echo "${description}" > "${check_filename}"
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notify "❌ ${description}"
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fi
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}
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# argument: hostname
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function check_ping {
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server="$1"
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if ping -c 5 -q $server > /dev/null 2>&1
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then
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check_passed "${server}-ping" "${server} ping is up"
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else
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check_failed "${server}-ping" "${server} ping is not responding"
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fi
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}
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# arguments: check_name url content_to_look_for
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function check_url {
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check_name="$1"
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url="$2"
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content_to_look_for="$3"
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if wget -q -O - "${url}" | grep "${content_to_look_for}" > /dev/null 2>&1
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then
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check_passed "${check_name}-url" "${check_name} UP: ${url} now contains ${content_to_look_for}"
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else
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check_failed "${check_name}-url" "${check_name} DOWN: ${url} does not contain ${content_to_look_for}"
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fi
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}
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# arguments: check_name command
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# warning: no sanitization
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function check_script {
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check_name="$1"
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shift
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OUTPUT=$( "$@" 2>&1)
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ERR=$?
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if [ $ERR -eq 0 ]
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then
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check_passed "${check_name}" "${check_name} UP: $OUTPUT"
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else
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check_failed "${check_name}" "${check_name} DOWN: $OUTPUT"
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fi
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}
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# argument: username hostname port
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function check_ssh {
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username="$1"
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hostname="$2"
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port="${3:-22}"
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status=$(ssh -o BatchMode=yes -o ConnectTimeout=5 ${username}@${hostname} -p ${port} echo ssh_connection_ok 2>&1)
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if [[ "${status}" == "ssh_connection_ok" ]] ; then
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check_passed "${username}-${hostname}-${port}-ssh" "${username}@${hostname}:${port} SSH is up"
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elif echo "${status}" | grep -q "Permission denied" ; then
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check_failed "${username}-${hostname}-${port}-ssh" "${username}@${hostname}:${port} SSH returned permission denied: ${status}"
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else
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check_failed "${username}-${hostname}-${port}-ssh" "${username}@${hostname}:${port} SSH is down: ${status}"
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fi
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}
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# here are the checks
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# check pings
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check_ping my-first.server.com
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check_ping my-second.server.com
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check_url my-first.server.com "https://my-first.server.com/url/index.html" "Welcome to My First Server"
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check_url my-third.server.com "https://my-third.server.com/index.html" "Welcome to My Third Server"
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check_ssh "johnpb27" "my-ssh.server.com" 22
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check_script "alliswell" "/usr/local/bin/is-all-well"
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# Leave this if you don't use signal-cli outside of this script,
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# otherwise comment out, see readme
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signal-cli -u $SIGNAL_USER receive > /dev/null 2>&1
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