[issue] golang/protobuf warning

[bigangryrobot]

Receiving this warning message when executing the server code locally

WARNING: Package "github.com/golang/protobuf/protoc-gen-go/generator" is deprecated.
	A future release of golang/protobuf will delete this package,
	which has long been excluded from the compatibility promise.

[benja-wu]

Thanks for reminding this. As running the go mod why check, seems that

√ easegress $ go mod why github.com/golang/protobuf/protoc-gen-go/generator
# github.com/golang/protobuf/protoc-gen-go/generator
github.com/megaease/easegress/pkg/cluster
go.etcd.io/etcd/embed
github.com/grpc-ecosystem/grpc-gateway/runtime
github.com/golang/protobuf/protoc-gen-go/generator

this warning is caused by grpc-gateway in etcd. In this release-note, grpc-gatway project had removed this dependence in 1.14.5.
We will figure out which latest version could be stable and also been able to remove this warning.

[xxx7xxxx]

This is because etcd[1] used grpc-gateway[2] needs the package golang/protobuf. Fixed by grpc-ecosystem/grpc-gateway#1260

The upgrade[3] of etcd will fix it.

[1] etcd-io/etcd#12124
[2] https://github.com/grpc-ecosystem/grpc-gateway
[3] https://github.com/etcd-io/etcd/blob/main/CHANGELOG-3.5.md#package-clientv3

[benja-wu]

Merged by #38