jenkins doesn't have rights to copy files - or does it? - jenkins

Question

I have a strange problem in jenkins, I cannot copy files in a job, however, with the user jenkins on the command line, I can do that without problem.
I am using jenkins on debian running under the user "jenkins".
I added the user "jenkins" to the group "www-data", so that I can copy files to the www-folder of apache.
The folder rights of the target folder look like this:
drwxrwxr-x 9 www-data www-data 4096 Jun 23 16:19 .
drwxrwxr-x 4 www-data www-data 4096 Jun 23 12:45 ..
-rw-rw-r-- 1 volker www-data 368 Jun 23 17:10 about.php
-rw-rw-r-- 1 volker www-data 366 Jun 23 17:10 bio.php
-rw-rw-r-- 1 volker www-data 370 Jun 23 17:10 contact.php
drwxrwxr-x 3 volker www-data 4096 Jun 23 16:19 content
drwxrwxr-x 3 volker www-data 4096 Jun 23 16:19 css
drwxrwxr-x 8 volker www-data 4096 Jun 23 16:19 default
drwxrwxr-x 3 volker www-data 4096 Jun 23 16:19 fonts
drwxrwxr-x 2 volker www-data 4096 Jun 23 13:40 image
drwxrwxr-x 3 volker www-data 4096 Jun 23 16:19 images
-rw-rw-r-- 1 volker www-data 372 Jun 23 17:10 impressum.php
-rw-rw-r-- 1 volker www-data 367 Jun 23 17:10 index.php
-rw-rw-r-- 1 volker www-data 296 Jun 23 13:52 kontakt.php
drwxrwxr-x 3 volker www-data 4096 Jun 23 16:19 layout
-rw-rw-r-- 1 volker www-data 367 Jun 23 17:10 news.php
-rw-rw-r-- 1 volker www-data 370 Jun 23 17:10 termine.php
-rw-rw-r-- 1 volker www-data 369 Jun 23 17:10 videos.php
So everything is writable for group www-data.
If I am using the jenkins user to copy the files in the shell, I get no error:
jenkins#rootserver:~/jobs/deploy_notundellende/workspace$ whoami
jenkins
jenkins#rootserver:~/jobs/deploy_notundellende/workspace$ cp -R * /var/www/nue
jenkins#rootserver:~/jobs/deploy_notundellende/workspace$
But if I use the same command in jenkins itself, it fails with permission error:
pwd
/var/lib/jenkins/jobs/deploy_notundellende/workspace
whoami
jenkins
cp -R about.php bio.php contact.php content css fonts images impressum.php index.php layout news.php termine.php videos.php /var/www/nue
cp: cannot create regular file `/var/www/nue/about.php': Permission denied
cp: cannot create regular file `/var/www/nue/bio.php': Permission denied
cp: cannot create regular file `/var/www/nue/contact.php': Permission denied
cp: cannot create regular file `/var/www/nue/content/videos.php': Permission denied
How is that possible? Does anyone have an idea?

Answer 1

OK, I got it to work, I restarted the jenkins server and it worked. I assume it did not work before, because the jenkins server was already running when I changed its permissions. Makes sense to me now, come to think of it :) Anyway, thanks for anybody reading and thinking about this!

Answer 2

Solution 1: Restart Jenkins
(jenkins_url)/safeRestart - Allows all running jobs to complete. New jobs will remain in the queue to run after the restart is complete.
(jenkins_url)/restart - Forces a restart without waiting for builds to complete.
Solution 2: Check the user and permission for the same user
Check user: whoami
change permission: sudo chmod -R 777 /var/www/html/* or sudo chmod a+rwx /var/szDirectoryName
Solution 3:
If you get error/warning like Linux: 'Username' is not in the sudoers file. This incident will be reported ref the link