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|
package git
import (
"context"
"fmt"
"strings"
grpc_ctxtags "github.com/grpc-ecosystem/go-grpc-middleware/tags"
"github.com/prometheus/client_golang/prometheus"
"gitlab.com/gitlab-org/gitaly/internal/config"
)
const (
// ProtocolV2 is the special value used by Git clients to request protocol v2
ProtocolV2 = "version=2"
)
var (
gitProtocolRequests = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: "gitaly_git_protocol_requests_total",
Help: "Counter of Git protocol requests",
},
[]string{"grpc_service", "grpc_method", "git_protocol"},
)
)
func init() {
prometheus.MustRegister(gitProtocolRequests)
}
// RequestWithGitProtocol holds requests that respond to GitProtocol
type RequestWithGitProtocol interface {
GetGitProtocol() string
}
// AddGitProtocolEnv checks whether the request has Git protocol v2
// and sets this in the environment.
func AddGitProtocolEnv(ctx context.Context, req RequestWithGitProtocol, env []string) []string {
service, method := methodFromContext(ctx)
if req.GetGitProtocol() == ProtocolV2 {
if config.Config.Git.ProtocolV2Enabled {
env = append(env, fmt.Sprintf("GIT_PROTOCOL=%s", ProtocolV2))
gitProtocolRequests.WithLabelValues(service, method, "v2").Inc()
} else {
gitProtocolRequests.WithLabelValues(service, method, "v2-rejected").Inc()
}
} else {
gitProtocolRequests.WithLabelValues(service, method, "v0").Inc()
}
return env
}
func methodFromContext(ctx context.Context) (service string, method string) {
tags := grpc_ctxtags.Extract(ctx)
ctxValue := tags.Values()["grpc.request.fullMethod"]
if ctxValue == nil {
return "", ""
}
if s, ok := ctxValue.(string); ok {
// Expect: "/foo.BarService/Qux"
split := strings.Split(s, "/")
if len(split) != 3 {
return "", ""
}
return split[1], split[2]
}
return "", ""
}
|
