Multus page updates

[nwneisen]

Found while taking a look at our Multus setup:

• We have some pages that assume mke4.yaml for the config file when running an apply. Some don't have anything. This page uses <mke-configuration-file>, it should be changed to whatever is consistent.
• Enable Multus -> 4 says MetalLb when this is Multus.
• Add a network interface should start with a step that you need to SSH in to each node to run the commands. It is currently easy to miss.
• This command is formatted incorrectly. Once it is copied, either manually or using the button, it is invalid bash

CNI_PLUGIN_VERSION=v1.3.0
CNI_ARCH=amd64
curl -sL
https://github.com/containernetworking/plugins/releases/download/${CNI_PLUGIN_VERSION}/cni-plugins-linux-${CNI_ARCH}-${CNI_PLUGIN_VERSION}.tgz
| sudo tar xvz -C /opt/cni/bin/

It should be

CNI_PLUGIN_VERSION=v1.3.0
CNI_ARCH=amd64
curl -sL https://github.com/containernetworking/plugins/releases/download/${CNI_PLUGIN_VERSION}/cni-plugins linux-${CNI_ARCH}-${CNI_PLUGIN_VERSION}.tgz | sudo tar xvz -C /opt/cni/bin/

In which the curl command is all on one line.

If it has to be on multiple lines, then \ should be used.

CNI_PLUGIN_VERSION=v1.3.0
CNI_ARCH=amd64
curl -sL \
https://github.com/containernetworking/plugins/releases/download/${CNI_PLUGIN_VERSION}/cni-plugins-linux-${CNI_ARCH}-${CNI_PLUGIN_VERSION}.tgz \
| sudo tar xvz -C /opt/cni/bin/

• Step 4 should separate the command from the output so that it can be easily copied