Update grpc dependency to 1.32.

[ptabor]

Simplify grpc testing infrastructure to align with upstream changes.

[ptabor]

I assume the PR is simple enough (just go.mod changes, and minor test adaptation), to merge without waiting for review.

[kprav33n]

Thank you for this fix, @ptabor. I'm developing a project that uses grpc 1.32 (I don't want to downgrade) and etcd. What should I be putting in my go.mod in order to pick up this change from master? Can someone please give me an example?

I tried putting a replace directive like this:

replace go.etcd.io/etcd v3.3.25+incompatible => go.etcd.io/etcd fa14a0af89e6d2626c6803654c1535e2e7e71240

However, I see this error message during build.

go: errors parsing go.mod:
**REDACTED**/go.mod:17: replace go.etcd.io/etcd: version "v0.5.0-alpha.5.0.20210223111928-fa14a0af89e6" invalid: go.mod has post-v0 module path "go.etcd.io/etcd/v3" at revision fa14a0af89e6

Alternately, I also tried removing all etcd related entries from go.mod and run go get under my project's root. I still see the same error.

❯ go get go.etcd.io/etcd@fa14a0af89e6d2626c6803654c1535e2e7e71240
go get go.etcd.io/etcd@fa14a0af89e6d2626c6803654c1535e2e7e71240: go.etcd.io/etcd@v0.5.0-alpha.5.0.20210223111928-fa14a0af89e6: invalid version: go.mod has post-v0 module path "go.etcd.io/etcd/v3" at revision fa14a0af89e6

I also tried adding v3 suffix to etcd module path and it doesn't help either.

❯ go get go.etcd.io/etcd/v3@fa14a0af89e6d2626c6803654c1535e2e7e71240
go: go.etcd.io/etcd/v3 fa14a0af89e6d2626c6803654c1535e2e7e71240 => v3.3.0-rc.0.0.20210223111928-fa14a0af89e6
go get: go.etcd.io/etcd/v3@v3.3.0-rc.0.0.20210223111928-fa14a0af89e6 requires
        go.etcd.io/etcd/api/v3@v3.5.0-pre: reading go.etcd.io/etcd/api/api/go.mod at revision api/v3.5.0-pre: unknown revision api/v3.5.0-pre

[kprav33n]

For now, I have created a git submodule in my repo under submodules/etcd and pinned it to commit fa14a0a

I then used the replace directive to use etcd client from my local submodule.

require (
	...
	go.etcd.io/etcd/client/v3 v3.5.0-pre
	...
)

replace (
	go.etcd.io/etcd/api/v3 => ./submodules/etcd/api
	go.etcd.io/etcd/client/v3 => ./submodules/etcd/client/v3
	go.etcd.io/etcd/pkg/v3 => ./submodules/etcd/pkg
)

Maybe there is a cleaner approach than this. But, I'm able to make progress with this hack.

[coolbaluk]

Thanks for all your work on this :)

I also have the same question, what should I be putting in my go.mod file to get these changes ?

[ptabor]

Now 3.5.0-alpha.0 got released.

so:

go get go.etcd.io/etcd/client/v3

or

go get go.etcd.io/etcd/client/v3@v3.5.0-alpha.0 

Should be all you need now. (without any 'replaces').