Sort containers in declared order

[ryanbrainard]

Is your feature request related to a problem? Please describe.
When viewing a pod with multiple containers, they are displayed in alphabetical order instead of the order they are declared in the pod spec. For normal containers this isn't so much of a problem since the order is irrelevant, but for initContainers, the declared order dictates the run order. It would make it much easier to view the pod stepping through the initContainers if they were in run order.

Describe the solution you'd like
Provide a sort option for containers to sort by the same order they are declared in the pod spec. Bonus if it's the default, but certainly not a requirement.

Describe alternatives you've considered
I guess one could prefix the container names with numbers to make them sort alphabetically.

[derailed]

@ryanbrainard Thank you for this great suggestion Ryan!
I like this idea especially in light of more workloads specify multiple init cos.

[ryanbrainard]

@derailed Glad you like it! I have a basic branch of this working and happy to open a PR, but before I do, a few questions:

• What would be a good name for this column? I used "DECLARED" for now, which is ok, but I feel like it may not be intuitive to users. Other ideas: "SPEC", "NATURAL", "DEFINED", "YAML", "INDEX" etc. Any preferences?
• Should the values be 0-indexed or 1-indexed? The way I did it is just an incrementing value with the init containers followed by the regular containers, but I guess we could get fancy and prefix them with something like "init-" and "reg-" so they are still sortable but show the index within each array.
• Any preferences on the keyboard shortcut, visibility, and if this is the default?

[ryanbrainard]

@derailed I took a stab at the implemention in #2878

[derailed]

@ryanbrainard Thank you for the details here Ryan! I'll take a peek at the pr.