docs: Disable initrd in dev guide
Add details on how to disable the `initrd` config option to ensure the
base system as documented is functional.
Fixes
* [Assumptions](#assumptions)
* [Build and install a Kata Containers runtime](#build-and-install-a-kata-containers-runtime)
* [Check hardware requirements](#check-hardware-requirements)
+ * [Disable initrd](#disable-initrd)
* [Enable full debug](#enable-full-debug)
* [Build and install Kata proxy](#build-and-install-kata-proxy)
* [Build and install Kata shim](#build-and-install-kata-shim)
@@ -62,6 +63,16 @@ $ sudo kata-runtime kata-check
If your system is *not* able to run Kata Containers, the previous command will error and explain why.
+## Disable initrd
+
+Unless you use an initial ramdisk (`initrd` or `initramfs`):
+
+```
+$ sudo sed -i 's/^\(initrd.*\)/# \1/g' /usr/share/defaults/kata-containers/configuration.toml
+```
+
+If you use an initial ramdisk, see https://github.com/kata-containers/osbuilder.
+
## Enable full debug
Enable full debug as follows:
