LINUX: How To Backup and Restore The Data Inside XFS Filesystem on the Linux Hosts?

XFS filesystem can be backed up on Linux hosts using xfsdump.

Below are steps.

Install xfsdump package if it does not exist.

 dnf -y install xfsdump

Backup the xfs filesystem using below xfsdump command.

xfsdump -f <filename>.dump <xfs filesystem to backup>

For example if you want to backup /var/lib/containers XFS filesystem and save the dump to /apps/images.dump, your command will look as follows:

xfsdump -f /apps/images.dump /var/lib/containers

Restore XFS filesystem from backup dump

If you want to restore the XFS filesystem from dump, use below command

xfsrestore -f <filename>.dump <xfs filesystem to restore to>

For example if you want to restore to /var/lib/containers XFS filesystem from the dump /apps/images.dump, your command will look as follows:

xfsrestore -f /apps/images.dump /var/lib/containers

Keywords:

backup backing restore restoring disasterrecovery DR disaster recover recovering dump file files original state 

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PODMAN: How To Change /var/tmp (imageCopyTmpDir ) Of Podman To Different Directory?

Below are steps to change the podman tmp directory from default /var/tmp location.

1. Set the podman tmp directory to desired directory. In below command example it is /var/tmp/testdir. Change the /var/tmp/testdir directory to directory of your choice.

$ export TMPDIR=/var/tmp/testdir

2. Restart podman and reload daemon.

Below are commands.

$ sudo systemctl daemon-reload

$ sudo systemctl restart podman

3. Validate podman tmp directory is changed to the new directory set.

Use below command.

$ podman info | grep -i tmp

Below is the output you should see which should change the tmp directory location for imageCopyTmpDir parameter

$ podman info | grep -i tmp

  imageCopyTmpDir: /var/tmp/testdir 

Keywords:

Change Changing Update Updating default custom tmp temp temporary directories directories files file modify modifying cache caching

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PODMAN: Command To Check The TEMP Image Copy Directory (tmp) Used By Podman

Below podman command can be used to check the podman temp file location where images are stored during pull/push

podman info | grep -i tmp

Keywords:

temporary temp tmp location file files cache checking validate validating how to check

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PODMAN: Command To Tail Podman Container Instance Logs

Below is the command to tail podman container instance logs.

podman logs -tf <container id>

<container id> can be gathered from "podman ps -a" command.

Keywords

tail tailing log logging logs logfiles file files 

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