Jenkins uptime - how long since last restart

Question

Is it possible to see how long a Jenkins instance/master has been running?

I've tried looking around in "Manage Jenkins" but can't find it there. I know I could log in and check the process on the machine, but is it possible to do it in Jenkins web UI?

This URL shows a white line when it was restarted... but it's not that intuitive.

<jenkins-url>/monitoring?part=graph&graph=usedMemory&period=mois

score 32 · Accepted Answer · answered Oct 21 '16 at 14:45

32

You can run groovy script on Jenkins web-ui from: Manage Jenkins > Script Console, and use Jenkins API. If you want to know how many days Jenkins has been running:

import java.util.concurrent.TimeUnit
long lastRestarted = Jenkins.instance.toComputer().getConnectTime()
long now =  System.currentTimeMillis()
println TimeUnit.MILLISECONDS.toDays(now - lastRestarted)

getConnectTime() of the master computer should be the time when it restarted. http://javadoc.jenkins.io/hudson/model/Computer.html#getConnectTime()

answered Oct 21 '16 at 14:45

arasio

1,260
10
14

Ok, we will probably run it as system groovy script to show it a build-name. Great thanks! – MaTePe Oct 21 '16 at 15:23
2

For version Jenkins ver. 2.32.2 it shows result zero. – AjayKumarBasuthkar Apr 29 '17 at 15:17
It works for me in Jenkins ver. 2.73.2. How did you run it? – MaTePe Nov 20 '17 at 09:57
2

In this case, you might want to replace `toDays(...)` in the last line with `toMinutes(...)` or whatever your desired resolution is. – Dirk May 14 '19 at 17:58

score 9 · Answer 2 · answered Jul 08 '20 at 05:36

There has been an Uptime class in Jenkins Core since a long time (Jenkins 1.538). So using the same principle with the script console, the code can be made more readable and robust:

println "Jenkins has been started " + (ExtensionList.lookupSingleton(Uptime.class).uptime / 1000 / 60 ) + " minutes ago"

Which will show, e.g.:

Jenkins has been started 175.8678166667 minutes ago

Note: ExtensionList.lookupSingleton was introduced in Jenkins 2.87. So if you're using an earlier version, use ExtensionList.lookup(Uptime.class).get(0) instead.

Jenkins uptime - how long since last restart

2 Answers2