Merge pull request #41935 from andreimatei/19.2-version19.2

settings/cluster: introducing the 19.2 cluster version

Author: andreimatei

docs/generated/settings/settings.html

@@ -134,6 +134,6 @@
 <tr><td><code>trace.debug.enable</code></td><td>boolean</td><td><code>false</code></td><td>if set, traces for recent requests can be seen in the /debug page</td></tr>
 <tr><td><code>trace.lightstep.token</code></td><td>string</td><td><code></code></td><td>if set, traces go to Lightstep using this token</td></tr>
 <tr><td><code>trace.zipkin.collector</code></td><td>string</td><td><code></code></td><td>if set, traces go to the given Zipkin instance (example: '127.0.0.1:9411'); ignored if trace.lightstep.token is set</td></tr>
-<tr><td><code>version</code></td><td>custom validation</td><td><code>19.1-11</code></td><td>set the active cluster version in the format '<major>.<minor>'</td></tr>
+<tr><td><code>version</code></td><td>custom validation</td><td><code>19.2</code></td><td>set the active cluster version in the format '<major>.<minor>'</td></tr>
 </tbody>
 </table>

pkg/server/version_cluster_test.go

@@ -134,11 +134,35 @@ func setupMixedCluster(
 }
 
 // Prev returns the previous version of the given version.
-// eg. prev(2.0) = 1.0, prev(2.1) == 2.0, prev(2.1-5) == 2.1.
+// eg. prev(20.1) = 19.2, prev(19.2) = 19.1, prev(19.1) = 2.1,
+// prev(2.0) = 1.0, prev(2.1) == 2.0, prev(2.1-5) == 2.1.
 func prev(version roachpb.Version) roachpb.Version {
 	if version.Unstable != 0 {
 		return roachpb.Version{Major: version.Major, Minor: version.Minor}
-	} else if version.Minor != 0 {
+	}
+
+	v19_1 := roachpb.Version{Major: 19, Minor: 1}
+
+	if v19_1.Less(version) {
+		if version.Minor > 1 {
+			return roachpb.Version{Major: version.Major, Minor: version.Minor - 1}
+		}
+		// Here we assume that there's going to only be 2 releases per year.
+		// Otherwise we'd need to keep some history of what releases we've had.
+		return roachpb.Version{Major: version.Major - 1, Minor: 2}
+	}
+
+	if version == v19_1 {
+		return roachpb.Version{Major: 2, Minor: 1}
+	}
+
+	// Logic for versions below 19.1.
+
+	if version.Major > 2 {
+		log.Fatalf(context.TODO(), "can't compute previous version for %s", version)
+	}
+
+	if version.Minor != 0 {
 		return roachpb.Version{Major: version.Major}
 	} else {
 		// version will be at least 2.0-X, so it's safe to set new Major to be version.Major-1.

pkg/settings/cluster/cockroach_versions.go

@@ -46,6 +46,7 @@ const (
 	VersionAtomicChangeReplicas
 	VersionTableDescModificationTimeFromMVCC
 	VersionPartitionedBackup
+	Version19_2
 
 	// Add new versions here (step one of two).
 
@@ -551,6 +552,11 @@ var versionsSingleton = keyedVersions([]keyedVersion{
 		Key:     VersionPartitionedBackup,
 		Version: roachpb.Version{Major: 19, Minor: 1, Unstable: 11},
 	},
+	{
+		// Version19_2 is CockroachDB v19.2. It's used for all v19.2.x patch releases.
+		Key:     Version19_2,
+		Version: roachpb.Version{Major: 19, Minor: 2},
+	},
 
 	// Add new versions here (step two of two).
 

pkg/settings/cluster/cockroach_versions_test.go

@@ -18,6 +18,8 @@ import (
 )
 
 func TestVersionsAreValid(t *testing.T) {
+	t.Skip("test skipped on the release 19.2 branch because we haven't " +
+		"removed old migrations introduced in 19.1")
 	defer leaktest.AfterTest(t)()
 
 	require.NoError(t, versionsSingleton.Validate())

pkg/settings/cluster/versionkey_string.go

@@ -289,7 +289,7 @@ select crdb_internal.set_vmodule('')
 query T
 select regexp_replace(crdb_internal.node_executable_version()::string, '(-\d+)?$', '');
 ----
-19.1
+19.2
 
 query ITTT colnames
 select node_id, component, field, regexp_replace(regexp_replace(value, '^\d+$', '<port>'), e':\\d+', ':<port>') as value from crdb_internal.node_runtime_info
@@ -442,7 +442,7 @@ select * from crdb_internal.gossip_alerts
 query T
 select regexp_replace(crdb_internal.node_executable_version()::string, '(-\d+)?$', '');
 ----
-19.1
+19.2
 
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