Is it possible to export the pm2 app status ?

[dinkonin]

Can we get a metric of the pm2 app status i.e. pm2_app_status{job="XXX",app="YYY"} $STATUS ?

Value mapped for example "online" = 1 , "stopped" = 0, "errored" = 2 would be awesome.

[VeXell]

Hello @dinkonin

Interesting question. But what a problem do you want to resolve with it?

[dinkonin]

Basically I monitor a server with 20+ apps ran by pm2, sometimes one of them errors out, or gets stopped accidentally by a developer and then forgotten. Ideally I would like to have an alertmanager rule for this situation and a timestamp of the exact time. It would also provide a nice overview of running/stopped apps in grafana.

[VeXell]

@dinkonin Ok, i will investigate what i can do here. But now i guess you can use app_uptime metric and if it changed it means something happened with the app. Also by my initial logic if app "stopped" or "errored" i will skip it in prom output.

[dinkonin]

Also by my initial logic if app "stopped" or "errored" i will skip it in prom output.

This is exactly why app_uptime would not work, the app just dissapears from the metrics even tho it is still there in pm2 list.

[VeXell]

@dinkonin yes, make sense. But anyway, i will do it in t next 2.4.0 release

[dinkonin]

Also currently i monitor this using node_exporter text collector, but it would be awesome if it's integrated in your app

Here is the bash script that generates the .prom fie

#!/usr/bin/env bash

echo '# TYPE PM2Status gauge'
pm2 jlist|jq --arg jqhost "$HOST" -rc '.[]|"PM2Status{host=\""+$jqhost+"\", name=\""+.name+"\"} \(if .pm2_env.status == "online" then 0 elif . == "stopped" then 1 else 2 end)"'