turbiniactl log gathering features

[aarontp]

The new turbiniactl gcplogs command is really great to have, and it would also be nice to be able to filter the output to make it a little easier to read. A couple quick ideas are:

• By default parse the json and only show the interesting fields. Maybe something like $timestamp, $origin, $severity, $message . Then we can have a separate --json flag that will dump it in the original jsonl format if needed.
• Add a --severity flag so that we can filter out things below a given log severity level (e.g. INFO, DEBUG, etc).

[aarontp]

FYI @alimez

[aarontp]

A couple other nice to have things:

• Make logs sort by "ascending" by default (could add a --descending option if we think that's useful)
• Have some kind of --maxlines default (maybe 1000?) since a days worth of logs can be quite a lot (and can take a bit of time). It would be nice if this could be the "tail" of the logs, but not sure if that's feasible.
• Add worker name to logs and possibly have a flag that can filter on that (or at least document how to add that to the query filter).

[aarontp]

We are in the process creating a new API server which will handle gathering of logs in the future, so I don't think that we will want to invest more time into the gcplogs command directly. I am still going to keep this open for now as these features will still likely be nice to have in the new implementation.

[aarontp]

I am going to close this out because this is mostly just relevant to the existing turbiniactl gcplogs command implementation which will be going away in the new architecture.