NBU: exclude '/usr/openv/netbackup/logs' directory instead of files in directory only

[rmetrich]

Relax-and-Recover (ReaR) Pull Request Template

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Pull Request Details:

• Type: Bug Fix

• Impact: Normal

• How was this pull request tested? Tested on RHEL7

• Brief description of the changes in this pull request:

When using the NetBackup method, the files in the logs directory are excluded because they are useless. However, if, for some reason /usr/openv/netbackup/logs is a symlink to some other directory (a user customization), then ReaR will fail to create the ISO, due to having a skeleton directory for NBU in ReaR, causing the 'tar | untar' of COPY_AS_IS items to fail.

[rmetrich]

Hello @rear/contributors , this issue was encountered by a Red Hat customer due to him having moved the netbackup log directory to some other place.
I found out this issue is in fact wider and may affect other components as well, even though it is quite unlikely to happen in normal situations.
For example, using the following configuration file and scenario, the ISO creation will die:

• Configuration file

  COPY_AS_IS+=( /etc/scripts )
  

• Scenario

  # ln -s /var/log /etc/scripts
  # rear mkrescue
  

• Output

  tar: Removing leading `/' from member names
  tar: Removing leading `/' from hard link targets
  tar: etc/scripts: Cannot open: File exists
  tar: Exiting with failure status due to previous errors
  

[jsmeix]

I know nothing about NBU so feel free to merge it when it works for you.

[jsmeix]

@gdha
should we have that in ReaR 2.5?
I would say yes.

[gdha]

@rmetrich Feel free to merge it as I just approved the PR (and @jsmeix did the same). It may be included in the 2.5 release