109 lines
3 KiB
Bash
Executable file
109 lines
3 KiB
Bash
Executable file
#!/usr/bin/env bash
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# usage
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usage() {
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SYSTEMD_CHECK_USAGE=$(cat <<EOF
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Usage: systemd_check.sh [CONFIG_FILE (absolute path)]
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Checks if specific systemd SYSTEMD_CHECK_SERVICES are running and optionally sends a mail.
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If no CONFIG_FILE is given, HOME/.systemd_check.conf is used. This fallback option
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has to exist or the script will exit.
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Configuration can be done in any file and any pre-defined variable can be overwritten.
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The following are at least required for the script to work:
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- SYSTEMD_CHECK_LIST_FILE="HOME/.systemd_check.list" // path to file to list services to check, one per line
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The following are optional or have reasonable defaults:
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- SYSTEMD_CHECK_MAIL_ENABLED=false // send email (SYSTEMD_CHECK_MAIL_ADDRESS has to be set to true)? false|true
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- SYSTEMD_CHECK_MAIL_ADDRESS="" // mail.rc has to be configured
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You can copy this script to '/usr/local/bin' and use create a custom CONFIG_FILE as user. Examples can be found in '/usr/share/doc/<scriptname>'.
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EOF
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)
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echo "$SYSTEMD_CHECK_USAGE";
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}
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set -e;
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# vars and defaults
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SYSTEMD_CHECK_LIST_FILE="$HOME/.systemd_check.list"
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SYSTEMD_CHECK_MAIL_ENABLED=fase
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SYSTEMD_CHECK_MAIL_ADDRESS=""
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SYSTEMD_CHECK_HOSTNAME=$(hostname)
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SYSTEMD_CHECK_USER=$(whoami)
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SYSTEMD_CHECK_SERVICES=()
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# check for config file
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source_config() {
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local config=$1;
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local configFallback=$2;
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if [[ ! -f "$config" ]]; then
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if [[ ! -f "$configFallback" ]]; then
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echo "No config file specified and could not find default in '$configFallback'!";
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echo "";
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usage;
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exit 1;
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else
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config=$configFallback;
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fi
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fi
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set -a;
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source "$config";
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set +a;
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}
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source_config "$1" "$HOME/.systemd_check.conf"
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if [ ! -f $SYSTEMD_CHECK_LIST_FILE ]; then
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echo "$SYSTEMD_CHECK_LIST_FILE doesn't exist. Add a file which holds one systemd service or timer per line.";
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echo "";
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usage;
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exit 1;
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fi
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echo "Scanning $SYSTEMD_CHECK_LIST_FILE for services...";
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while IFS='' read -r line || [[ -n "$line" ]]; do
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SYSTEMD_CHECK_SERVICES+=("$line")
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echo "-> Found $line";
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done < "$SYSTEMD_CHECK_LIST_FILE"
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# get status for a service
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function checkService() {
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local SERVICE=$1;
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local MESSAGE="$SERVICE is not running for user $SYSTEMD_CHECK_USER";
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local ROOT_COMMAND="systemctl is-active --quiet $SERVICE";
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local USER_COMMAND="systemctl --user is-active --quiet $SERVICE";
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local RESULT=1;
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if [ "$(id -u)" != "0" ]; then
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if [ $($USER_COMMAND) ]; then
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RESULT=0;
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fi
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else
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if [ $($ROOT_COMMAND) ] || [ $($USER_COMMAND) ]; then
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RESULT=0;
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fi
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fi
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if [ "$RESULT" -gt 0 ]; then
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local SUBJECT="[systemd $SYSTEMD_CHECK_HOSTNAME for $SYSTEMD_CHECK_USER] CRITICAL $SERVICE";
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echo "-> $SUBJECT: $MESSAGE";
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if [ "$SYSTEMD_CHECK_MAIL_ENABLED" = true ]; then
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echo $MESSAGE|mailx -Ssendwait -s "$SUBJECT" $SYSTEMD_CHECK_MAIL_ADDRESS;
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fi
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fi
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return;
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}
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# execute check for defined SYSTEMD_CHECK_SERVICES
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for service in "${SYSTEMD_CHECK_SERVICES[@]}"; do
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echo "Checking $service...";
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checkService "$service"
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done
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