Docker & Kubernetes

Docker

To begin with, Docker runs best with the "overlay2" Linux kernel driver enabled/loaded. Run this command as the root/superer or with sudo, as seen here to enable the kernel module at each reboot:

[jamie@cos8vm51.dawgland.com:~]$ echo "overlay" > /etc/modules-load.d/overlay.conf;

Reboot and double check that the Linux kernel overlay module is loaded with this command:

[jamie@cos8vm51.dawgland.com:~]$ lsmod | grep overlay
overlay               135168  0
[jamie@cos8vm51.dawgland.com:~]$ 

If you get the "overlay 135168 0" response after typing the "lsmod | grep overlay" command, you are good to go. If not, you need a newer Linux kernel that supports the overlay2 driver, which is beyond the scope of this article, and you basically need to pick a different Linux distribution.

Kubernetes

Kubernetes info coming soon...