storage: require enterprise license for WAL failover

If WAL failover is configured but the user has not provided an enterprise
license, WAL failover will refuse to failover and log a warning message every
10 minutes.

Epic: none
Release note: none

pkg/storage/open.go

@@ -22,6 +22,7 @@ import (
 	"github.com/cockroachdb/cockroach/pkg/roachpb"
 	"github.com/cockroachdb/cockroach/pkg/settings/cluster"
 	"github.com/cockroachdb/cockroach/pkg/storage/fs"
+	"github.com/cockroachdb/cockroach/pkg/util/log"
 	"github.com/cockroachdb/errors"
 	"github.com/cockroachdb/pebble"
 	"github.com/cockroachdb/pebble/vfs"
@@ -394,6 +395,7 @@ func WALFailover(walCfg base.WALFailoverConfig, storeEnvs fs.Envs) ConfigOption
 func makePebbleWALFailoverOptsForDir(
 	settings *cluster.Settings, dir wal.Dir,
 ) *pebble.WALFailoverOptions {
+	cclWALFailoverLogEvery := log.Every(10 * time.Minute)
 	return &pebble.WALFailoverOptions{
 		Secondary: dir,
 		FailoverOptions: wal.FailoverOptions{
@@ -408,8 +410,13 @@ func makePebbleWALFailoverOptsForDir(
 				//
 				// NB: We do not use settings.Version.IsActive because we do not have a
 				// guarantee that the cluster version has been initialized.
-				failoverOK := settings.Version.ActiveVersionOrEmpty(context.TODO()).IsActive(clusterversion.V24_1Start)
-				return walFailoverUnhealthyOpThreshold.Get(&settings.SV), failoverOK
+				versionOK := settings.Version.ActiveVersionOrEmpty(context.TODO()).IsActive(clusterversion.V24_1Start)
+				// WAL failover is a licensed feature.
+				licenseOK := base.CCLDistributionAndEnterpriseEnabled(settings)
+				if !licenseOK && cclWALFailoverLogEvery.ShouldLog() {
+					log.Warningf(context.Background(), "Ignoring WAL failover configuration because it requires an enterprise license.")
+				}
+				return walFailoverUnhealthyOpThreshold.Get(&settings.SV), versionOK && licenseOK
 			},
 		},
 	}