Service Age not status

[otheus]

It would be in most circumstances better to get the actual timestamp of the last time the service was restarted. Unfortunately, Zabbix' custom params does not know how to handle exception data other than making the service unavilable, so 0 probably makes sense. HEre is my implementation, based on your check-status script:

service="$1"
if [[ -z "$service" ]]; then
        # Assume they mean the system itself
        date +%s -d "$(uptime --since)"
else
        hrt=$(systemctl show "$service" --property=ActiveEnterTimestamp | awk -F= '{print $2}')
        if [[ -z $hrt ]] || [[ "$hrt" = 0 ]]; then
                echo 0
        else
                date +%s -d "$hrt"
        fi
fi

[otheus]

Also, I refactored the other script into a nicer more efficient pipeline, but it shaves only 1% of execution time at best. I then did it in perl for a 1.01% speed-up! Here's the SH pipeline version.

extract_enabled_service_names() {
        awk -F'[. \t]+' '$2 == "service" && $3 ~ "^(generated|enabled)" {print $1}'
}

include_whitelist_only() {
        if [[ -r /etc/zabbix/service_discovery_whitelist ]] ; then
            grep -E -f /etc/zabbix/service_discovery_whitelist
        else cat; fi
}
exclude_blacklist() {
        if [[ -r /etc/zabbix/service_discovery_blacklist ]] ; then
            grep -Ev -f /etc/zabbix/service_discovery_blacklist
        else cat; fi
}
convert_to_json() {
        awk 'BEGIN { print "{\"data\":["; } NR>1 { printf(",");} { printf("{\"{#SERVICE}\": \"%s\"}",$0) } END { print "]}" } '
}

systemctl list-unit-files |
        extract_enabled_service_names |
        include_whitelist_only |
        exclude_blacklist |
        convert_to_json