UPSTREAM <carry>: etcdctl: allow move-leader to connect to multiple e…

…ndpoints Re-opening closed PR etcd-io#11775 which was originaly authored by benmoss. Then again opened PR etcd-io#12757 which was authored by zerodayz. The mustClientForCmd function is responsible for parsing environment variables and flags into configuration data. A change was made in etcd-io#9382 to call Fatal if a flag is provided multiple times. This means that we cannot call the mustClientForCmd function more than once, since it will think that flags parsed the first time are now being redefined and error out. Some people have commented about this in etcd-io#8380 but I don't think there's an open issue for it. Signed-off-by: Thomas Jungblut <[email protected]>
openshift · Sep 7, 2022 · dddb0ac · dddb0ac
1 parent 31b6b2d
commit dddb0ac
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Showing 2 changed files with 30 additions and 8 deletions.
diff --git a/etcdctl/ctlv3/command/move_leader_command.go b/etcdctl/ctlv3/command/move_leader_command.go
@@ -19,6 +19,7 @@ import (
 	"strconv"
 
 	"github.com/spf13/cobra"
+
 	"go.etcd.io/etcd/client/v3"
 	"go.etcd.io/etcd/pkg/v3/cobrautl"
 )
@@ -43,7 +44,8 @@ func transferLeadershipCommandFunc(cmd *cobra.Command, args []string) {
 		cobrautl.ExitWithError(cobrautl.ExitBadArgs, err)
 	}
 
-	c := mustClientFromCmd(cmd)
+	cfg := clientConfigFromCmd(cmd)
+	c := cfg.mustClient()
 	eps := c.Endpoints()
 	c.Close()
 
@@ -53,7 +55,6 @@ func transferLeadershipCommandFunc(cmd *cobra.Command, args []string) {
 	var leaderCli *clientv3.Client
 	var leaderID uint64
 	for _, ep := range eps {
-		cfg := clientConfigFromCmd(cmd)
 		cfg.endpoints = []string{ep}
 		cli := cfg.mustClient()
 		resp, serr := cli.Status(ctx, ep)

diff --git a/tests/e2e/ctl_v3_move_leader_test.go b/tests/e2e/ctl_v3_move_leader_test.go
@@ -27,15 +27,31 @@ import (
 	"go.etcd.io/etcd/client/v3"
 )
 
-func TestCtlV3MoveLeaderSecure(t *testing.T) {
-	testCtlV3MoveLeader(t, *newConfigTLS())
-}
+func TestCtlV3MoveLeaderScenarios(t *testing.T) {
+	securityParent := map[string]struct {
+		cfg etcdProcessClusterConfig
+	}{
+		"Secure":   {cfg: *newConfigTLS()},
+		"Insecure": {cfg: *newConfigNoTLS()},
+	}
 
-func TestCtlV3MoveLeaderInsecure(t *testing.T) {
-	testCtlV3MoveLeader(t, *newConfigNoTLS())
+	tests := map[string]struct {
+		env map[string]string
+	}{
+		"happy path": {env: map[string]string{}},
+		"with env":   {env: map[string]string{"ETCDCTL_ENDPOINTS": "something-else-is-set"}},
+	}
+
+	for testName, tc := range securityParent {
+		for subTestName, tx := range tests {
+			t.Run(testName+" "+subTestName, func(t *testing.T) {
+				testCtlV3MoveLeader(t, tc.cfg, tx.env)
+			})
+		}
+	}
 }
 
-func testCtlV3MoveLeader(t *testing.T, cfg etcdProcessClusterConfig) {
+func testCtlV3MoveLeader(t *testing.T, cfg etcdProcessClusterConfig, envVars map[string]string) {
 	BeforeTest(t)
 
 	epc := setupEtcdctlTest(t, &cfg, true)
@@ -94,6 +110,7 @@ func testCtlV3MoveLeader(t *testing.T, cfg etcdProcessClusterConfig) {
 		cfg:         *newConfigNoTLS(),
 		dialTimeout: 7 * time.Second,
 		epc:         epc,
+		envMap:      envVars,
 	}
 
 	tests := []struct {
@@ -108,6 +125,10 @@ func testCtlV3MoveLeader(t *testing.T, cfg etcdProcessClusterConfig) {
 			[]string{cx.epc.EndpointsV3()[leadIdx]},
 			fmt.Sprintf("Leadership transferred from %s to %s", types.ID(leaderID), types.ID(transferee)),
 		},
+		{ // request to all endpoints
+			cx.epc.EndpointsV3(),
+			fmt.Sprintf("Leadership transferred"),
+		},
 	}
 	for i, tc := range tests {
 		prefix := cx.prefixArgs(tc.eps)