Support `grpc_read_timeout` and `grpc_send_timeout` in annotations

[Anddd7]

What do you want to happen?

We want to configure the grpc_read_timeout and grpc_send_timeout with annotations on ingress.

Since the server-snippet has some potential risk, we have to migrate all snippets to common annotations.
https://github.com/search?q=repo%3Akubernetes%2Fingress-nginx+path%3A%2F%5Einternal%5C%2Fingress%5C%2Fannotations%5C%2F%2F+parser.AnnotationRiskCritical&type=code

Is there currently another issue associated with this?

#2475, but it's inactive and closed.

Does it require a particular kubernetes version?

No

Solutions

1. Add new annotations, e.g.

...
annotations:
  nginx.ingress.kubernetes.io/grpc_read_timeout: 3600
  nginx.ingress.kubernetes.io/grpc_send_timeout: 3600
...

2. Set grpc_read_timeout and grpc_send_timeout with the same value in proxy_read_timeout

Similar like nginx-ingress-controller, just set grpc with proxy settings by default

[Anddd7]

i'd like to contribute if it's ready to implement

[longwuyuan]

/triage accepted

• I think a PR will be reviewed because it will offset using snippets
• But need to improve he accuracy of reference because that link is a nginx webserver and reverseproxy link and this is a go+lua implementation of ingress API. But yeah it is obviously originating in nginx upstream
• Do you want to submit a PR
• There is even a video on how to create new annotation in the docs on the developer's help page

[longwuyuan]

/assign

[Anddd7]

@longwuyuan yes, i have read the docs and read to create a PR.

I refer to exsiting proxy settings to create 3 annotations for grpc timeout, please take a look, #11258

I'll refine the documentation later.

the upstream nginx is already support this, https://nginx.org/en/docs/http/ngx_http_grpc_module.html#grpc_connect_timeout.

[strongjz]

/priority backlog