126 lines
3 KiB
Bash
Executable file
126 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=$(cat <<EOF
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Usage: systemd_check.sh
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Checks a set of systemd services, targets, mounts of timers, and notifies if their state is not up and running. Please see man systemd_check.
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EOF
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)
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echo "$SYSTEMD_CHECK_USAGE";
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}
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set -e;
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# check for config file
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apply_config() {
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local config=$1;
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if [[ ! -f "$config" ]]; then
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echo "No config file specified";
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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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set -a;
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# shellcheck disable=SC1090
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source "$config";
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set +a;
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}
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source_config() {
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local configFallback=$1;
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local configGlobalFallback=$2;
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if [[ -f "$configFallback" ]]; then
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apply_config "$configFallback";
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return;
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fi
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if [[ -f "$configGlobalFallback" ]]; then
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apply_config "$configGlobalFallback";
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return;
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fi
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}
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check_required() {
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type hostname &> /dev/null || { echo "Requiring 'hostname' but it's not installed"; exit 1; }
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type mailx &> /dev/null || { echo "Requiring 'mailx' but it's not installed"; exit 1; }
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type whoami &> /dev/null || { echo "Requiring 'whoami' but it's not installed"; exit 1; }
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type systemctl &> /dev/null || { echo "Requiring 'systemctl' but it's not installed"; exit 1; }
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}
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SYSTEMD_CHECK_LIST_FILE="$HOME/.systemd_check.list"
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SYSTEMD_CHECK_GLOBAL_LIST_FILE="/etc/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_SERVICES=()
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source_config "$HOME/.systemd_check.conf" "/etc/systemd_check.conf"
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check_required
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SYSTEMD_CHECK_HOSTNAME=$(hostname)
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SYSTEMD_CHECK_USER=$(whoami)
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listFileToUse=""
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if [[ -f "$SYSTEMD_CHECK_LIST_FILE" ]]; then
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listFileToUse="$SYSTEMD_CHECK_LIST_FILE"
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else
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listFileToUse="$SYSTEMD_CHECK_GLOBAL_LIST_FILE"
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fi
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if [[ ! -f $listFileToUse ]]; then
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echo "$listFileToUse 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 $listFileToUse for services...";
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while IFS='' read -r line || [[ -n "$line" ]]; do
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SYSTEMD_CHECK_SERVICES+=("$line")
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echo "-> Found $line";
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done < "$listFileToUse"
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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 $SERVICE";
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local RESULT=0;
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if [ "$(id -u)" != "0" ]; then
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# shellcheck disable=SC2091
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if ! $($USER_COMMAND); then
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RESULT=1;
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fi
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else
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# shellcheck disable=SC2091
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if ! $($ROOT_COMMAND) && ! $($USER_COMMAND); then
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RESULT=1;
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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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