Add jaeger-postgresql to storage plugins list

[robbert229]

Which problem is this PR solving?

This PR lists the postgres-jaeger storage plugin that I maintain to the storage plugins list.

Description of the changes

Adds a link to the storage plugin list.

How was this change tested?

It was visually checked.

Checklist

• I have read https://github.com/jaegertracing/jaeger/blob/master/CONTRIBUTING_GUIDELINES.md
• I have signed all commits
• I have added unit tests for the new functionality
• I have run lint and test steps successfully
  • for jaeger: make lint test
  • for jaeger-ui: yarn lint and yarn test

[netlify]

✅ Deploy Preview for romantic-neumann-1959d7 ready!

Name	Link
🔨 Latest commit	63b6bf8
🔍 Latest deploy log	https://app.netlify.com/sites/romantic-neumann-1959d7/deploys/65f374e667024f00080fe777
😎 Deploy Preview	https://deploy-preview-684--romantic-neumann-1959d7.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[jkowall]

Thanks for your contribution and the plugin, have you considered how this will work with Jaeger v2 with the new collector?

[robbert229]

Good question, as soon as v2 gets to a mature state I plan on making the migration immediately.

[yurishkuro]

@robbert229 is it implemented as a go-plugin or gRPC server? We plan to sunset the go-plugin support and only support remote servers implementing Remote Storage API (which is mostly how go-plugin also works plus some sidecar mechanics). In Jaeger-v2 the gRPC path is already supported (but we also plan to introduce a V2 Storage API that will be batch-based, not single span like V1 API).

[robbert229]

It's implemented as a gRPC Server.

I will say that the gRPC server experience is significantly better in my opinion than the original plug-in developer experience.

(I am excitedly waiting for the v2 storage api)

[yurishkuro]

I will say that the gRPC server experience is significantly better in my opinion than the original plug-in developer experience.

this is why we want to sunset the latter :-). jaegertracing/jaeger#4647