Install Jenkins on a VM (Lab) Issue

DevOps
#1

I’m having problems starting Jenkins for this lab exercise.

I’m getting this everytime I run “sudo systemctl start jenkins”:

$ sudo systemctl start jenkins
Job for jenkins.service failed because the control process exited with error code. See "systemctl status jenkins.service" and "journalctl -xe" for details.

systemctl status jenkins gives this:

# systemctl status jenkins
● jenkins.service - Jenkins Continuous Integration Server
   Loaded: loaded (/usr/lib/systemd/system/jenkins.service; enabled; vendor preset: disabled)
   Active: failed (Result: start-limit) since Tue 2024-01-02 13:09:21 UTC; 1min 26s ago
  Process: 79026 ExecStart=/usr/bin/jenkins (code=exited, status=1/FAILURE)
 Main PID: 79026 (code=exited, status=1/FAILURE)

Jan 02 13:09:21 centos-host systemd[1]: Failed to start Jenkins Continuous Integration Server.
Jan 02 13:09:21 centos-host systemd[1]: Unit jenkins.service entered failed state.
Jan 02 13:09:21 centos-host systemd[1]: jenkins.service failed.
Jan 02 13:09:21 centos-host systemd[1]: jenkins.service holdoff time over, scheduling restart.
Jan 02 13:09:21 centos-host systemd[1]: Stopped Jenkins Continuous Integration Server.
Jan 02 13:09:21 centos-host systemd[1]: start request repeated too quickly for jenkins.service
Jan 02 13:09:21 centos-host systemd[1]: Failed to start Jenkins Continuous Integration Server.
Jan 02 13:09:21 centos-host systemd[1]: Unit jenkins.service entered failed state.
Jan 02 13:09:21 centos-host systemd[1]: jenkins.service failed.

Journalctl -xe gives this:

Jan 02 13:09:21 centos-host systemd[1]: jenkins.service failed.
Jan 02 13:09:21 centos-host systemd[1]: jenkins.service holdoff time over, scheduling restart.
Jan 02 13:09:21 centos-host systemd[1]: Stopped Jenkins Continuous Integration Server.
-- Subject: Unit jenkins.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit jenkins.service has finished shutting down.
Jan 02 13:09:21 centos-host systemd[1]: Starting Jenkins Continuous Integration Server...
-- Subject: Unit jenkins.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit jenkins.service has begun starting up.
Jan 02 13:09:21 centos-host systemd[1]: systemd-journald.service: Couldn't add fd to fd store: Operation n
Jan 02 13:09:21 centos-host jenkins[79026]: jenkins: failed to find a valid Java installation
Jan 02 13:09:21 centos-host systemd[1]: jenkins.service: main process exited, code=exited, status=1/FAILUR
Jan 02 13:09:21 centos-host systemd[1]: Failed to start Jenkins Continuous Integration Server.
-- Subject: Unit jenkins.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit jenkins.service has failed.
-- 
-- The result is failed.
Jan 02 13:09:21 centos-host systemd[1]: Unit jenkins.service entered failed state.
Jan 02 13:09:21 centos-host systemd[1]: jenkins.service failed.
Jan 02 13:09:21 centos-host systemd[1]: jenkins.service holdoff time over, scheduling restart.
Jan 02 13:09:21 centos-host systemd[1]: Stopped Jenkins Continuous Integration Server.
-- Subject: Unit jenkins.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit jenkins.service has finished shutting down.
Jan 02 13:09:21 centos-host systemd[1]: start request repeated too quickly for jenkins.service
Jan 02 13:09:21 centos-host systemd[1]: Failed to start Jenkins Continuous Integration Server.
-- Subject: Unit jenkins.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit jenkins.service has failed.
-- 
-- The result is failed.
Jan 02 13:09:21 centos-host systemd[1]: Unit jenkins.service entered failed state.
Jan 02 13:09:21 centos-host systemd[1]: jenkins.service failed.
Jan 02 13:10:40 centos-host sudo[82731]:      bob : TTY=pts/0 ; PWD=/home/bob ; USER=root ; COMMAND=/bin/b
Jan 02 13:10:40 centos-host sudo[82731]: pam_unix(sudo-i:session): session opened for user root by (uid=0)
lines 653-699/699 (END)

Please advise.

#2

Did you install Java? If so which version?

#3

I followed the link posted on the lab - https://www.jenkins.io/doc/book/installing/linux/#red-hat-centos

The command was:

sudo yum install fontconfig java-17-openjdk
#4

Run Jenkins in the foreground to see what the error is.

#5

I managed to make it work by installing an older version of Java. Perhaps this can be updated?

#6

Actually you are right, these instructions used to work but they are incorrect right now.

The instructions were updated 7 months ago to use OpenJDK version 17, however Centos 7 does not have OpenJDK 17 - you can use OpenJDK 11, it is in the supported list.

Update Linux installation for Java 17 (#6502) · jenkins-infra/jenkins.io@21e7185 (github.com)