bucket inspect: support machine-readable output formats

[matthiasr]

Is your proposal related to a problem?

When I want to do an action on a specific subset of blocks, I need a list of those blocks.
thanos tools bucket ls gives me a list of all buckets, but does not allow filtering.
thanos tools bucket inspect does exactly the filtering it needs, but the output is geared towards human readability.
I need to do awk gymnastics to extract the block ID.

Describe the solution you'd like

Add a --output / -o flag to thanos tools bucket inspect, which allows selecting output formats.
Ideas for formats:

• table: current format, default
• id: block IDs only, similar to ls
• csv: quoted comma-separated values
• tsv: tab-separated values, great for consumption with Unix tools
• json: JSON encoding (exact format tbd), great for consumption with jq or scripting languages

Describe alternatives you've considered

• Currently possible:

thanos tools bucket inspect … | awk '$1 == "|" && $2 != "ULID" { print $2 }'

• add label filtering to bucket ls – solves my concrete issue, but is less generally useful. Making all the information machine readable allows all kinds of integrations. Harder to judge whether the filter is correct.

Additional context

I chose the proposed flag to be in line with kubectls multiple outputs.
I don't think Thanos needs the full power of that just yet but keeping the flags similar makes them easier to remember.

[wiardvanrij]

Well explained and I think this would provide good value. Would you be interested on creating this feature or an initial draft for it?

[matthiasr]

Unfortunately I won't have the time anytime soon, but I wanted to put the idea out there 😃

[someshkoli]

Created an initial draft for this, PTAL @wiardvanrij @matthiasr

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity in the next two weeks, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[stale]

Closing for now as promised, let us know if you need this to be reopened! 🤗

[wiardvanrij]

PR still open, relevant

[stale]

Hello 👋 Looks like there was no activity on this issue for the last two months.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity in the next two weeks, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[matthiasr]

PR is open and waiting for a review.

[matthiasr]

We're gonna need an anti-stalebot-bot soon …