etcd、grpc、protobuf兼容性问题

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逍遥游10 2022-07-22 18:45:16 博主文章分类：Go

文章标签 etcd grpc go mvc github 文章分类 后端开发

etcd、grpc、protobuf兼容性问题

文章目录

etcd、grpc、protobuf兼容性问题

1. 错误1
2. 错误2
3. 错误3
4. 错误4
5. 错误5

近来在学习 etcd, 拿到一份代码的 demo. 想跑起来看看效果。没想过这竟然是个艰难的过程，记录下来，以便大家遇到同样的问题时，可以快速解决。

protoc –-go_out=plugins=grpc:. *.proto

1. 错误1

报错如下：

2020/04/26 16:33:39 WARNING: Missing 'go_package' option in "hello.proto", please specify:
        option go_package = ".;protoes";
A future release of protoc-gen-go will require this be specified.
See https://developers.google.com/protocol-buffers/docs/reference/go-generated#package for more information.

这个比较好解决，按照提示把第 3 行改为第 4 行(注意：Windows下可能需要将.改为./)，如下图

etcd、grpc、protobuf兼容性问题_github

2. 错误2

go.mod 目录下执行 go mod tidy
报错如下：

go: finding github.com/golang/groupcache latest
go: etcdDemo/etcdservice imports
        go.etcd.io/etcd/clientv3 tested by
        go.etcd.io/etcd/clientv3.test imports
        github.com/coreos/etcd/auth imports
        github.com/coreos/etcd/mvcc/backend imports
        github.com/coreos/bbolt: github.com/coreos/bbolt@v1.3.4: parsing go.mod:
        module declares its path as: go.etcd.io/bbolt
                but was required as: github.com/coreos/bbolt

在 go.mod 中添加两行

replace github.com/coreos/bbolt v1.3.4 => go.etcd.io/bbolt v1.3.4
replace go.etcd.io/bbolt v1.3.4 =>

再次执行 go mod tidy, 再次报错如下：

go: finding golang.org/x/net latest
go: finding github.com/coreos/go-systemd latest
go: finding github.com/coreos/pkg latest
go: finding golang.org/x/time latest
go: finding github.com/xiang90/probing latest
go: finding github.com/tmc/grpc-websocket-proxy latest
go: finding github.com/golang/groupcache latest
etcdDemo/etcdservice imports
        go.etcd.io/etcd/clientv3 imports
        github.com/coreos/etcd/pkg/logutil imports
        github.com/coreos/go-systemd/journal: no matching versions for query "latest"

go 1.13 的版本导致的（go 1.14 应该没有）
解决方法：在 go.mod 中添加

replace github.com/coreos/go-systemd =>

再次 go mod tidy , 这一项暂时通过了。

3. 错误3

执行 go build
报错如下：

D:\code\etcdDemo\server>go build
#github.com/coreos/etcd/clientv3/balancer/resolver/endpoint
E:\gocode\pkg\mod\github.com\coreos\etcd@v3.3.20+incompatible\clientv3\balancer\resolver\endpoint\endpoint.go:114:78: undefined: resolver.BuildOption
E:\gocode\pkg\mod\github.com\coreos\etcd@v3.3.20+incompatible\clientv3\balancer\resolver\endpoint\endpoint.go:182:31: undefined: resolver.ResolveNowOption
#github.com/coreos/etcd/clientv3/balancer/picker

原因 etcd3.3.20 的 release 版本要求 grpc 的版本是 v1.26.0 之前的。而此时 go.mod 里面的 google.golang.org/grpc 是 v1.29.1
解决方法：在 go.mod 里添加一句

replace google.golang.org/grpc =>

4. 错误4

go build 接着报错，如下：

D:\code\etcdDemo\server>go build

# etcdDemo/protoes

..\protoes\hello.pb.go:292:11: undefined: grpc.SupportPackageIsVersion6
..\protoes\hello.pb.go:303:5: undefined: grpc.ClientConnInterface

# etcdDemo/etcdservice

..\etcdservice\resolver.go:82:4: invalid case "go.etcd.io/etcd/mvcc/mvccpb".PUT in switch on ev.Type (mismatched types "go.etcd.io/etcd/mvcc/mvccpb".Event_EventType and "github.com/coreos/etcd/mvcc/mvccpb".
Event_EventType)
..\etcdservice\resolver.go:87:4: invalid case "go.etcd.io/etcd/mvcc/mvccpb".DELETE in switch on ev.Type (mismatched types "go.etcd.io/etcd/mvcc/mvccpb".Event_EventType and "github.com/coreos/etcd/mvcc/mvccp
b".Event_EventType)

原因：此时设备上的 proto-gen-go 是 v1.4.0 版本，它要求 grpc 的版本是 v1.27.0 往后的，而刚才 etcd 要求 grpc 是 v.1.26.0 ! 无奈了，柿子挑软的捏吧，把 proto-gen-go 降级到能够匹配 grpc v.1.26.0 的版本。执行下面这条命令

go get -u -v github.com/golang/protobuf/protoc-gen-go@v1.2.0

之后千万别忘了，重新生成 proto

5. 错误5

继续 go build, 继续报错！！！（心态有点儿崩了。。。）

D:\code\etcdDemo\server>go build
go: finding google.golang.org/genproto latest
go: finding github.com/golang/protobuf v1.3.3

# etcdDemo/etcdservice

..\etcdservice\resolver.go:82:4: invalid case "go.etcd.io/etcd/mvcc/mvccpb".PUT in switch on ev.Type (mismatched types "go.etcd.io/etcd/mvcc/mvccpb".Event_EventType and "github.com/coreos/etcd/mvcc/mvccpb".
Event_EventType)
..\etcdservice\resolver.go:87:4: invalid case "go.etcd.io/etcd/mvcc/mvccpb".DELETE in switch on ev.Type (mismatched types "go.etcd.io/etcd/mvcc/mvccpb".Event_EventType and "github.com/coreos/etcd/mvcc/mvccp
b".Event_EventType)
..\etcdservice\resolver.go:82:4: invalid case "go.etcd.io/etcd/mvcc/mvccpb".PUT in switch on ev.Type (mismatched types "go.etcd.io/etcd/mvcc/mvccpb".Event_EventTyp
Event_EventType)
..\etcdservice\resolver.go:87:4: invalid case "go.etcd.io/etcd/mvcc/mvccpb".DELETE in switch on ev.Type (mismatched types "go.etcd.io/etcd/mvcc/mvccpb".Event_Event
b".Event_EventType)