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migration: introduce the IterateRangeDescriptors primitive
It's not currently wired up to anything. We'll use it in future PRs to send out `Migrate` requests to the entire keyspace. This was originally prototyped in cockroachdb#57445. See the inline comments and the RFC (cockroachdb#48843) for the motivation here. Release note: None
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// Copyright 2020 The Cockroach Authors. | ||
// | ||
// Use of this software is governed by the Business Source License | ||
// included in the file licenses/BSL.txt. | ||
// | ||
// As of the Change Date specified in that file, in accordance with | ||
// the Business Source License, use of this software will be governed | ||
// by the Apache License, Version 2.0, included in the file | ||
// licenses/APL.txt. | ||
package migration_test | ||
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import ( | ||
"context" | ||
"testing" | ||
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"github.com/cockroachdb/cockroach/pkg/clusterversion" | ||
"github.com/cockroachdb/cockroach/pkg/kv/kvserver" | ||
"github.com/cockroachdb/cockroach/pkg/migration" | ||
"github.com/cockroachdb/cockroach/pkg/roachpb" | ||
"github.com/cockroachdb/cockroach/pkg/sql/tests" | ||
"github.com/cockroachdb/cockroach/pkg/testutils/serverutils" | ||
"github.com/cockroachdb/cockroach/pkg/util/leaktest" | ||
) | ||
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func TestHelperIterateRangeDescriptors(t *testing.T) { | ||
defer leaktest.AfterTest(t) | ||
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cv := clusterversion.ClusterVersion{} | ||
ctx := context.Background() | ||
const numNodes = 1 | ||
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params, _ := tests.CreateTestServerParams() | ||
server, _, kvDB := serverutils.StartServer(t, params) | ||
defer server.Stopper().Stop(context.Background()) | ||
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var numRanges int | ||
if err := server.GetStores().(*kvserver.Stores).VisitStores(func(s *kvserver.Store) error { | ||
numRanges = s.ReplicaCount() | ||
return nil | ||
}); err != nil { | ||
t.Fatal(err) | ||
} | ||
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c := migration.TestingNewCluster(numNodes, migration.TestingWithKV(kvDB)) | ||
h := migration.TestingNewHelper(c, cv) | ||
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for _, blockSize := range []int{1, 5, 10, 50} { | ||
var numDescs int | ||
init := func() { numDescs = 0 } | ||
if err := h.IterateRangeDescriptors(ctx, blockSize, init, func(descriptors ...roachpb.RangeDescriptor) error { | ||
numDescs += len(descriptors) | ||
return nil | ||
}); err != nil { | ||
t.Fatal(err) | ||
} | ||
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if numDescs != numRanges { | ||
t.Fatalf("expected to find %d ranges, found %d", numRanges+1, numDescs) | ||
} | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,29 @@ | ||
// Copyright 2020 The Cockroach Authors. | ||
// | ||
// Use of this software is governed by the Business Source License | ||
// included in the file licenses/BSL.txt. | ||
// | ||
// As of the Change Date specified in that file, in accordance with | ||
// the Business Source License, use of this software will be governed | ||
// by the Apache License, Version 2.0, included in the file | ||
// licenses/APL.txt. | ||
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package migration_test | ||
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import ( | ||
"os" | ||
"testing" | ||
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"github.com/cockroachdb/cockroach/pkg/security" | ||
"github.com/cockroachdb/cockroach/pkg/security/securitytest" | ||
"github.com/cockroachdb/cockroach/pkg/server" | ||
"github.com/cockroachdb/cockroach/pkg/testutils/serverutils" | ||
"github.com/cockroachdb/cockroach/pkg/testutils/testcluster" | ||
) | ||
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func TestMain(m *testing.M) { | ||
security.SetAssetLoader(securitytest.EmbeddedAssets) | ||
serverutils.InitTestServerFactory(server.TestServerFactory) | ||
serverutils.InitTestClusterFactory(testcluster.TestClusterFactory) | ||
os.Exit(m.Run()) | ||
} |