Podman - Change container image storage location

Depending on the amount of images and the size of each image, the backing storage requirements can grow quite large. I'll reconfigure podman to use a new mountpoint to use as backing storage for container images.

First, some disk-configuration is required. I'll be using logical volumes for easy volume management:

 [root@podman02 ~]# pvcreate /dev/vdb  
 [root@podman02 ~]# vgcreate vg_data /dev/vdb  
 [root@podman02 ~]# lvcreate -n lv_var_podman -L 20G  
 [root@podman02 ~]# mkfs -t xfs /dev/vg_data/lv_var_podman  
 [root@podman02 ~]# cat << EOF >> /etc/fstab  
 /dev/vg_data/lv_var_podman /var/podman xfs defaults 0 0  
 EOF  
 [root@podman02 ~]# systemctl daemon-reload  
 [root@podman02 ~]# mount -a  

Now, let's reconfigure the storage setting for a user. I'll be using my user as an example.

 [root@podman02 ~]# mkdir -p -m 750 /var/podman/archy  
 [root@podman02 ~]# chown -R archy:archy /var/podman/archy  
 [root@podman02 ~]# sudo -Hiu archy  
 [archy@podman02 ~]$ mkdir -p -m 750 ~/.config/containers/  
 [archy@podman02 ~]$ cat << EOF >> ~/.config/containers/storage.conf  
 [storage]  
 driver = "overlay"  
 graphroot = "/var/podman/archy"  
 EOF  

The Configuration should be present now. As a last step, we need to configure SELinux on EL Based platforms. There is a reference already present which can be used:

 [root@podman02 ~]# semanage fcontext -a -e /var/lib/containers/storage /var/podman/archy  
 [root@podman02 ~]# restorecon -rv /var/podman  

Podman will now use the new storage backend.

Feel free to comment and / or suggest a topic.