http: add GetVersion API (#7648)

ref #7300

Signed-off-by: lance6716 <lance6716@gmail.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
Co-authored-by: Hu# <ihusharp@gmail.com>

client/http/interface.go

@@ -76,6 +76,7 @@ type Client interface {
 	AccelerateScheduleInBatch(context.Context, []*KeyRange) error
 	/* Other interfaces */
 	GetMinResolvedTSByStoresIDs(context.Context, []uint64) (uint64, map[uint64]uint64, error)
+	GetPDVersion(context.Context) (string, error)
 	/* Micro Service interfaces */
 	GetMicroServiceMembers(context.Context, string) ([]string, error)
 
@@ -723,3 +724,16 @@ func (c *client) GetMicroServiceMembers(ctx context.Context, service string) ([]
 	}
 	return members, nil
 }
+
+// GetPDVersion gets the release version of the PD binary.
+func (c *client) GetPDVersion(ctx context.Context) (string, error) {
+	var ver struct {
+		Version string `json:"version"`
+	}
+	err := c.request(ctx, newRequestInfo().
+		WithName(getPDVersionName).
+		WithURI(Version).
+		WithMethod(http.MethodGet).
+		WithResp(&ver))
+	return ver.Version, err
+}

client/http/request_info.go

@@ -61,6 +61,7 @@ const (
 	accelerateScheduleInBatchName           = "AccelerateScheduleInBatch"
 	getMinResolvedTSByStoresIDsName         = "GetMinResolvedTSByStoresIDs"
 	getMicroServiceMembersName              = "GetMicroServiceMembers"
+	getPDVersionName                        = "GetPDVersion"
 )
 
 type requestInfo struct {

tests/integrations/client/http_client_test.go

@@ -30,6 +30,7 @@ import (
 	"github.com/tikv/pd/pkg/schedule/placement"
 	"github.com/tikv/pd/pkg/utils/testutil"
 	"github.com/tikv/pd/pkg/utils/tsoutil"
+	"github.com/tikv/pd/pkg/versioninfo"
 	"github.com/tikv/pd/tests"
 )
 
@@ -478,3 +479,10 @@ func (suite *httpClientTestSuite) TestTransferLeader() {
 	re.Len(members.Members, 2)
 	re.Equal(leader.GetName(), members.Leader.GetName())
 }
+
+func (suite *httpClientTestSuite) TestVersion() {
+	re := suite.Require()
+	ver, err := suite.client.GetPDVersion(suite.ctx)
+	re.NoError(err)
+	re.Equal(versioninfo.PDReleaseVersion, ver)
+}