thanos: Expose Thanos APIs to OpenAPI/protobuf and expose on website and UIs

[bwplotka]

In order to improve Thanos usage for users, we would like to define our APIs both HTTP and gRPC in protobuf/OpenAPI and expose those in the website. This would allow users to use tools for documentation, validation, type checking and even code generation to use our APIs efficiently. During this, we also expect collaboration with the Prometheus project to be similar on Prometheus' side. https://github.com/cncf/mentoring/blob/master/summerofcode/2021.md#port-the-prometheus-api-to-openapi.

Acceptance Criteria:

• Define all APIs in protobuf (for consistency).
• Use protobuf to generate code to use on our server.
• Be able to generate OpenAPI from protobuf.
• Define all configuration potentially in protobuf too: https://github.com/openproto/protoconfig
• Optionally we would like to have on the index page on every Thanos component server.

[NBNARADHYA]

Hey guys 🙋‍♂️, I'm Nikhil.

I saw this project on the LFX Mentorship site and it needs a mentee for the project. I have applied for this project on the LFX Mentorship website and I would love to work on this ! 😃

[bwplotka]

Asked for some feedback on buf Slack: https://bufbuild.slack.com/archives/CRZ680FUH/p1622737333123900

[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]

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! 🤗

[stale]

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

[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! 🤗