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Making Reshard work smoothly with Atomic Transactions (#16844)
Signed-off-by: Manan Gupta <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| /* | ||
| Copyright 2024 The Vitess Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package cluster | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "slices" | ||
| "strings" | ||
| "testing" | ||
| "time" | ||
| ) | ||
|
|
||
| // ReshardWorkflow is used to store the information needed to run | ||
| // Reshard commands. | ||
| type ReshardWorkflow struct { | ||
| t *testing.T | ||
| clusterInstance *LocalProcessCluster | ||
| workflowName string | ||
| targetKs string | ||
| sourceShards string | ||
| targetShards string | ||
| } | ||
|
|
||
| // NewReshard creates a new ReshardWorkflow. | ||
| func NewReshard(t *testing.T, clusterInstance *LocalProcessCluster, workflowName, targetKs, targetShards, srcShards string) *ReshardWorkflow { | ||
| return &ReshardWorkflow{ | ||
| t: t, | ||
| clusterInstance: clusterInstance, | ||
| workflowName: workflowName, | ||
| targetKs: targetKs, | ||
| sourceShards: srcShards, | ||
| targetShards: targetShards, | ||
| } | ||
| } | ||
|
|
||
| func (rw *ReshardWorkflow) Create() (string, error) { | ||
| args := []string{"Create"} | ||
| if rw.sourceShards != "" { | ||
| args = append(args, "--source-shards="+rw.sourceShards) | ||
| } | ||
| if rw.targetShards != "" { | ||
| args = append(args, "--target-shards="+rw.targetShards) | ||
| } | ||
|
|
||
| return rw.exec(args...) | ||
| } | ||
|
|
||
| func (rw *ReshardWorkflow) exec(args ...string) (string, error) { | ||
| args2 := []string{"Reshard", "--workflow=" + rw.workflowName, "--target-keyspace=" + rw.targetKs} | ||
| args2 = append(args2, args...) | ||
| return rw.clusterInstance.VtctldClientProcess.ExecuteCommandWithOutput(args2...) | ||
| } | ||
|
|
||
| func (rw *ReshardWorkflow) SwitchReadsAndWrites() (string, error) { | ||
| return rw.exec("SwitchTraffic") | ||
| } | ||
|
|
||
| func (rw *ReshardWorkflow) ReverseReadsAndWrites() (string, error) { | ||
| return rw.exec("ReverseTraffic") | ||
| } | ||
|
|
||
| func (rw *ReshardWorkflow) Cancel() (string, error) { | ||
| return rw.exec("Cancel") | ||
| } | ||
|
|
||
| func (rw *ReshardWorkflow) Complete() (string, error) { | ||
| return rw.exec("Complete") | ||
| } | ||
|
|
||
| func (rw *ReshardWorkflow) Show() (string, error) { | ||
| return rw.exec("Show") | ||
| } | ||
|
|
||
| func (rw *ReshardWorkflow) WaitForVreplCatchup(timeToWait time.Duration) { | ||
| targetShards := strings.Split(rw.targetShards, ",") | ||
| for _, ks := range rw.clusterInstance.Keyspaces { | ||
| if ks.Name != rw.targetKs { | ||
| continue | ||
| } | ||
| for _, shard := range ks.Shards { | ||
| if !slices.Contains(targetShards, shard.Name) { | ||
| continue | ||
| } | ||
| vttablet := shard.PrimaryTablet().VttabletProcess | ||
| vttablet.WaitForVReplicationToCatchup(rw.t, rw.workflowName, fmt.Sprintf("vt_%s", vttablet.Keyspace), "", timeToWait) | ||
| } | ||
| } | ||
| } |
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