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vertical_split_task.go
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vertical_split_task.go
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/*
Copyright 2017 Google Inc.
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 automation
import (
"strings"
automationpb "vitess.io/vitess/go/vt/proto/automation"
"vitess.io/vitess/go/vt/topo/topoproto"
)
// VerticalSplitTask is a cluster operation to split out specific tables of one
// keyspace to a different keyspace.
type VerticalSplitTask struct {
}
// Run is part of the Task interface.
func (t *VerticalSplitTask) Run(parameters map[string]string) ([]*automationpb.TaskContainer, string, error) {
// Required parameters.
// Example: source_keyspace
sourceKeyspace := parameters["source_keyspace"]
// Example: destination_keyspace
destKeyspace := parameters["dest_keyspace"]
// Example: 10-20
shards := strings.Split(parameters["shard_list"], ",")
// Example: table1,table2
tables := parameters["tables"]
// Example: localhost:15000
vtctldEndpoint := parameters["vtctld_endpoint"]
// Example: localhost:15001
vtworkerEndpoint := parameters["vtworker_endpoint"]
// Optional parameters.
// Example: 1
minHealthyRdonlyTablets := parameters["min_healthy_rdonly_tablets"]
var newTasks []*automationpb.TaskContainer
copySchemaTasks := NewTaskContainer()
for _, shard := range shards {
AddTask(copySchemaTasks, "CopySchemaShardTask", map[string]string{
"source_keyspace_and_shard": topoproto.KeyspaceShardString(sourceKeyspace, shard),
"dest_keyspace_and_shard": topoproto.KeyspaceShardString(destKeyspace, shard),
"vtctld_endpoint": vtctldEndpoint,
"tables": tables,
})
}
newTasks = append(newTasks, copySchemaTasks)
vSplitCloneTasks := NewTaskContainer()
for _, shard := range shards {
// TODO(mberlin): Add a semaphore as argument to limit the parallism.
AddTask(vSplitCloneTasks, "VerticalSplitCloneTask", map[string]string{
"dest_keyspace": destKeyspace,
"shard": shard,
"tables": tables,
"vtworker_endpoint": vtworkerEndpoint,
"min_healthy_rdonly_tablets": minHealthyRdonlyTablets,
})
}
newTasks = append(newTasks, vSplitCloneTasks)
// TODO(mberlin): When the framework supports nesting tasks, these wait tasks should be run before each SplitDiff.
waitTasks := NewTaskContainer()
for _, shard := range shards {
AddTask(waitTasks, "WaitForFilteredReplicationTask", map[string]string{
"keyspace": destKeyspace,
"shard": shard,
"max_delay": "30s",
"vtctld_endpoint": vtctldEndpoint,
})
}
newTasks = append(newTasks, waitTasks)
// TODO(mberlin): Run all SplitDiffTasks in parallel which do not use overlapping source shards for the comparison.
for _, shard := range shards {
vSplitDiffTask := NewTaskContainer()
AddTask(vSplitDiffTask, "VerticalSplitDiffTask", map[string]string{
"dest_keyspace": destKeyspace,
"shard": shard,
"vtworker_endpoint": vtworkerEndpoint,
"min_healthy_rdonly_tablets": minHealthyRdonlyTablets,
})
newTasks = append(newTasks, vSplitDiffTask)
}
for _, servedType := range []string{"rdonly", "replica", "master"} {
migrateServedTypesTasks := NewTaskContainer()
for _, shard := range shards {
AddTask(migrateServedTypesTasks, "MigrateServedFromTask", map[string]string{
"dest_keyspace": destKeyspace,
"shard": shard,
"type": servedType,
"vtctld_endpoint": vtctldEndpoint,
})
}
newTasks = append(newTasks, migrateServedTypesTasks)
}
return newTasks, "", nil
}
// RequiredParameters is part of the Task interface.
func (t *VerticalSplitTask) RequiredParameters() []string {
return []string{"source_keyspace", "dest_keyspace", "shard_list",
"tables", "vtctld_endpoint", "vtworker_endpoint"}
}
// OptionalParameters is part of the Task interface.
func (t *VerticalSplitTask) OptionalParameters() []string {
return []string{"min_healthy_rdonly_tablets"}
}