Addon Postgres-operator

[MdSahil-oss]

Description of your changes

Addon Postgres-operator

How has this code been tested?

Checklist

I have:

• Title of the PR starts with type (e.g. [Addon] , [example] or [Doc]).
• Updated/Added any relevant documentation and examples.
• New addon should be put in experimental.
• Update addon should modify the version in metadata.yaml to generate a new version.

Verified Addon promotion rules

If this pr wants to promote an experimental addon to verified, you must check whether meet these conditions too:

• This addon must be tested by addon's e2e-test to guarantee this addon can be enabled successfully.
• This addon must have some basic but necessary information.
  • An accessible icon url and source url defined in addon's metadata.yaml.
  • A detail introduction include a basic example about how to use and what's the benefit of this addon in README.md.
  • Also provide an introduction in KubeVela documentation.
  • It's more likely to be accepted if useful examples provided in example dir.

[MdSahil-oss]

@wonderflow I'm getting an error of Unhealthy Fetch repository successfully whenever i'm trying to build addon with helm chart, Am I missing somthing that I need to add, If so can you refer me to the doc.

[wangyikewxgm]

@wonderflow I'm getting an error of Unhealthy Fetch repository successfully whenever i'm trying to build addon with helm chart, Am I missing somthing that I need to add, If so can you refer me to the doc.

I found that the helm chart specified is not exist in this repo when I tested in local:

NAME                            CHART VERSION   APP VERSION     DESCRIPTION                                       
postgress/postgres-operator     1.9.0           1.9.0           Postgres Operator creates and manages PostgreSQ...

Can you check it?

[MdSahil-oss]

Hi! @wangyikewxgm Yes! It's existing and I figured out what was the problem, now I'm able to install postgres-operator with the helm.

[MdSahil-oss]

@wangyikewxgm @wonderflow I've added the definition for the postgres-operator can you review it :)

[wangyikewxgm]

LGTM, thanks for the contribution！I think there is still room for improvement to increase the availability of this addon.

[wangyikewxgm]

Can you add a sample app YAML in the examples directory and provide a comprehensive introduction in the README.md file? BackStage addon is a good example.