tt replicaset upgrade: support remote replicaset

Part of tarantool#968

@TarantoolBot document
Title: `tt replicaset upgrade` supports upgrade database schema
on remote replica sets

`tt replicaset upgrade` now allows upgrade database schema on remote
replica sets within a Tarantool cluster. The feature enables to perform
upgrades by targeting specific instances of each replica set.

**Usage Example**:

Cluster configuration:
```
• router-001
    • router-001-a localhost:3305 rw
• storage-001
    • storage-001-a localhost:3301 rw
    • storage-001-b localhost:3302 read
• storage-002
    • storage-002-a localhost:3303 rw
    • storage-002-b localhost:3304 read
```

To update the schema across this cluster:

1. Update each replica set individually.
2. Select one instance from each replica set to run the command.

**Commands**:
```bash
$ tt replicaset upgrade tcp://client:secret@127.0.0.1:3301
  • storage-001: ok
$ tt replicaset upgrade tcp://client:secret@127.0.0.1:3304
  • storage-002: ok
$ tt replicaset upgrade tcp://client:secret@127.0.0.1:3305
  • router-001: ok
```

CHANGELOG.md

@@ -12,6 +12,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - `tt replicaset upgrade`: command to upgrade the schema on a Tarantool cluster.
   * `-r (--replicaset)`: specify the replicaset name(s) to upgrade.
   * `-t (--timeout)`: timeout for waiting the LSN synchronization (in seconds) (default 5).
+  * supports upgrading the database schema on remote cluster by upgrading
+  each replica set individually using `tt replicaset upgrade <URI>`.
 - New flag `--timestamp` of `tt cat` and `tt play` commands is added to specify
 operations ending with the given timestamp. This value can be specified
 as a number or using [RFC3339/RFC3339Nano](https://go.dev/src/time/format.go) time format.

cli/cmd/replicaset.go

@@ -58,7 +58,8 @@ var (
 // newUpgradeCmd creates a "replicaset upgrade" command.
 func newUpgradeCmd() *cobra.Command {
 	cmd := &cobra.Command{
-		Use:                   "upgrade (<APP_NAME>) [flags]",
+		Use: "upgrade (<APP_NAME> | <URI>) [flags]\n\n" +
+			replicasetUriHelp,
 		DisableFlagsInUseLine: true,
 		Short:                 "Upgrade tarantool cluster",
 		Long: "Upgrade tarantool cluster.\n\n" +
@@ -79,6 +80,7 @@ func newUpgradeCmd() *cobra.Command {
 		"timeout for waiting the LSN synchronization (in seconds)")
 
 	addOrchestratorFlags(cmd)
+	addTarantoolConnectFlags(cmd)
 	return cmd
 }
 
@@ -530,6 +532,18 @@ func internalReplicasetUpgradeModule(cmdCtx *cmdcontext.CmdCtx, args []string) e
 	if ctx.IsInstanceConnect {
 		defer ctx.Conn.Close()
 	}
+
+	connectCtx := connect.ConnectCtx{
+		Username:    replicasetUser,
+		Password:    replicasetPassword,
+		SslKeyFile:  replicasetSslKeyFile,
+		SslCertFile: replicasetSslCertFile,
+		SslCaFile:   replicasetSslCaFile,
+		SslCiphers:  replicasetSslCiphers,
+	}
+	var connOpts connector.ConnectOpts
+	connOpts, _, _ = resolveConnectOpts(cmdCtx, cliOpts, &connectCtx, args)
+
 	return replicasetcmd.Upgrade(replicasetcmd.DiscoveryCtx{
 		IsApplication: ctx.IsApplication,
 		RunningCtx:    ctx.RunningCtx,
@@ -538,7 +552,7 @@ func internalReplicasetUpgradeModule(cmdCtx *cmdcontext.CmdCtx, args []string) e
 	}, replicasetcmd.UpgradeOpts{
 		ChosenReplicasetAliases: chosenReplicasetAliases,
 		LsnTimeout:              lsnTimeout,
-	})
+	}, connOpts)
 }
 
 // internalReplicasetPromoteModule is a "promote" command for the replicaset module.

cli/replicaset/cmd/upgrade.go

@@ -62,7 +62,7 @@ func filterReplicasetsByAliases(replicasets replicaset.Replicasets,
 }
 
 // Upgrade upgrades tarantool schema.
-func Upgrade(discoveryCtx DiscoveryCtx, opts UpgradeOpts) error {
+func Upgrade(discoveryCtx DiscoveryCtx, opts UpgradeOpts, connOpts connector.ConnectOpts) error {
 	replicasets, err := getReplicasets(discoveryCtx)
 	if err != nil {
 		return err
@@ -75,12 +75,13 @@ func Upgrade(discoveryCtx DiscoveryCtx, opts UpgradeOpts) error {
 		return err
 	}
 
-	return internalUpgrade(replicasetsToUpgrade, opts.LsnTimeout)
+	return internalUpgrade(replicasetsToUpgrade, opts.LsnTimeout, connOpts)
 }
 
-func internalUpgrade(replicasets []replicaset.Replicaset, lsnTimeout int) error {
+func internalUpgrade(replicasets []replicaset.Replicaset, lsnTimeout int,
+	connOpts connector.ConnectOpts) error {
 	for _, replicaset := range replicasets {
-		err := upgradeReplicaset(replicaset, lsnTimeout)
+		err := upgradeReplicaset(replicaset, lsnTimeout, connOpts)
 		if err != nil {
 			fmt.Printf("• %s: error\n", replicaset.Alias)
 			return fmt.Errorf("replicaset %s: %w", replicaset.Alias, err)
@@ -99,7 +100,8 @@ func closeConnectors(master *instanceMeta, replicas []instanceMeta) {
 	}
 }
 
-func getInstanceConnector(instance replicaset.Instance) (connector.Connector, error) {
+func getInstanceConnector(instance replicaset.Instance,
+	connOpts connector.ConnectOpts) (connector.Connector, error) {
 	run := instance.InstanceCtx
 	fullInstanceName := running.GetAppInstanceName(run)
 	if fullInstanceName == "" {
@@ -116,33 +118,55 @@ func getInstanceConnector(instance replicaset.Instance) (connector.Connector, er
 	})
 
 	if err != nil {
-		return nil, fmt.Errorf("instance %s failed to connect via UNIX socket "+
-			": %w", fullInstanceName, err)
+		fErr := err
+		conn, err = connector.Connect(connector.ConnectOpts{
+			Network:  connOpts.Network,
+			Address:  instance.URI,
+			Username: connOpts.Username,
+			Password: connOpts.Password,
+			Ssl:      connOpts.Ssl,
+		})
+		if err != nil {
+			return nil, fmt.Errorf("instance %s failed to connect via UNIX socket "+
+				"and uri: %w %w", fullInstanceName, err, fErr)
+		}
 	}
 	return conn, nil
 }
 
-func collectRWROInfo(replset replicaset.Replicaset) (*instanceMeta, []instanceMeta,
+func collectRWROInfo(replset replicaset.Replicaset,
+	connOpts connector.ConnectOpts) (*instanceMeta, []instanceMeta,
 	error) {
 	var master *instanceMeta = nil
 	var replicas []instanceMeta
 	for _, instance := range replset.Instances {
 		run := instance.InstanceCtx
 		fullInstanceName := running.GetAppInstanceName(run)
-		conn, err := getInstanceConnector(instance)
+		conn, err := getInstanceConnector(instance, connOpts)
 
 		if err != nil {
 			return nil, nil, err
 		}
 
+		isRW := false
+
 		if instance.Mode == replicaset.ModeUnknown {
-			closeConnectors(master, replicas)
-			return nil, nil, fmt.Errorf(
-				"can't determine RO/RW mode on instance: %s", fullInstanceName)
+			// TODO (gh-1034): Temporary workaround for mode assignment.
+			// Ideally, the discovery code should be updated to handle
+			// this case properly.
+			res, err := conn.Eval(
+				"return (type(box.cfg) == 'function') or box.info.ro",
+				[]any{}, connector.RequestOpts{})
+			if err != nil || len(res) == 0 {
+				return nil, nil, fmt.Errorf(
+					"can't determine RO/RW mode on instance: %s",
+					fullInstanceName)
+			}
+			isRW = !res[0].(bool)
+		} else {
+			isRW = instance.Mode.String() == "rw"
 		}
 
-		isRW := instance.Mode.String() == "rw"
-
 		if isRW && master != nil {
 			closeConnectors(master, replicas)
 			return nil, nil, fmt.Errorf("%s and %s are both masters",
@@ -231,8 +255,9 @@ func snapshot(instance *instanceMeta) error {
 	return nil
 }
 
-func upgradeReplicaset(replicaset replicaset.Replicaset, lsnTimeout int) error {
-	master, replicas, err := collectRWROInfo(replicaset)
+func upgradeReplicaset(replicaset replicaset.Replicaset, lsnTimeout int,
+	connOpts connector.ConnectOpts) error {
+	master, replicas, err := collectRWROInfo(replicaset, connOpts)
 	if err != nil {
 		return err
 	}

test/integration/replicaset/small_cluster_app/config.yaml

@@ -0,0 +1,28 @@
+credentials:
+  users:
+    client:
+      password: 'secret'
+      roles: [super]
+    guest:
+      roles: [super]
+
+app:
+  file: 'init.lua'
+
+groups:
+  group-001:
+    replicasets:
+      replicaset-001:
+        instances:
+          storage-master:
+            iproto:
+              listen:
+                - uri: '127.0.0.1:3301'
+            database:
+              mode: rw
+          storage-replica:
+            iproto:
+              listen:
+                - uri: '127.0.0.1:3302'
+            database:
+              mode: ro

test/integration/replicaset/small_cluster_app/init.lua

@@ -0,0 +1,4 @@
+local fio = require('fio')
+
+fh = fio.open('ready-' .. box.info.name, {'O_WRONLY', 'O_CREAT'}, tonumber('644',8))
+fh:close()

test/integration/replicaset/small_cluster_app/instances.yml

@@ -0,0 +1,4 @@
+storage-master:
+
+storage-replica:
+

test/integration/replicaset/test_replicaset_upgrade.py

@@ -4,7 +4,7 @@
 import tempfile
 
 import pytest
-from replicaset_helpers import stop_application
+from replicaset_helpers import start_application, stop_application
 from vshard_cluster import VshardCluster
 
 from utils import get_tarantool_version, run_command_and_get_output, wait_file
@@ -192,3 +192,26 @@ def test_upgrade_downgraded_cluster_replicasets(tt_cmd, tmp_path):
 
     finally:
         app.stop()
+
+
+@pytest.mark.skipif(tarantool_major_version < 3,
+                    reason="skip cluster instances test for Tarantool < 3")
+def test_upgrade_remote_replicasets(tt_cmd, tmpdir_with_cfg):
+    tmpdir = tmpdir_with_cfg
+    app_name = "small_cluster_app"
+    app_path = os.path.join(tmpdir, app_name)
+    shutil.copytree(os.path.join(os.path.dirname(__file__), app_name), app_path)
+    instances = ['storage-master', 'storage-replica']
+
+    try:
+        start_application(tt_cmd, tmpdir, app_name, instances)
+        uri = "tcp://client:secret@127.0.0.1:3301"
+        upgrade_cmd = [tt_cmd, "replicaset", "upgrade", uri, "-t=15"]
+        rc, out = run_command_and_get_output(upgrade_cmd, cwd=tmpdir)
+        assert rc == 0
+        assert "ok" in out
+
+    finally:
+        stop_cmd = [tt_cmd, "stop", app_name, "-y"]
+        stop_rc, stop_out = run_command_and_get_output(stop_cmd, cwd=tmpdir)
+        assert stop_rc == 0