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// Copyright 2020 PingCAP, 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package task
import (
"context"
"fmt"
"strings"
dmspec "github.com/pingcap/tiup/components/dm/spec"
"github.com/pingcap/tiup/pkg/cluster/spec"
"github.com/pingcap/tiup/pkg/set"
)
// UpdateDMMeta is used to maintain the DM meta information
type UpdateDMMeta struct {
cluster string
metadata *dmspec.Metadata
deletedNodesID []string
}
// NewUpdateDMMeta create i update dm meta task.
func NewUpdateDMMeta(cluster string, metadata *dmspec.Metadata, deletedNodesID []string) *UpdateDMMeta {
return &UpdateDMMeta{
cluster: cluster,
metadata: metadata,
deletedNodesID: deletedNodesID,
}
}
// Execute implements the Task interface
// the metadata especially the topology is in wide use,
// the other callers point to this field by a pointer,
// so we should update the original topology directly, and don't make a copy
func (u *UpdateDMMeta) Execute(ctx context.Context) error {
deleted := set.NewStringSet(u.deletedNodesID...)
topo := u.metadata.Topology
masters := make([]*dmspec.MasterSpec, 0)
for i, instance := range (&dmspec.DMMasterComponent{Topology: topo}).Instances() {
if deleted.Exist(instance.ID()) {
continue
}
masters = append(masters, topo.Masters[i])
}
topo.Masters = masters
workers := make([]*dmspec.WorkerSpec, 0)
for i, instance := range (&dmspec.DMWorkerComponent{Topology: topo}).Instances() {
if deleted.Exist(instance.ID()) {
continue
}
workers = append(workers, topo.Workers[i])
}
topo.Workers = workers
monitors := make([]*spec.PrometheusSpec, 0)
for i, instance := range (&spec.MonitorComponent{Topology: topo}).Instances() {
if deleted.Exist(instance.ID()) {
continue
}
monitors = append(monitors, topo.Monitors[i])
}
topo.Monitors = monitors
grafanas := make([]*spec.GrafanaSpec, 0)
for i, instance := range (&spec.GrafanaComponent{Topology: topo}).Instances() {
if deleted.Exist(instance.ID()) {
continue
}
grafanas = append(grafanas, topo.Grafanas[i])
}
topo.Grafanas = grafanas
alertmanagers := make([]*spec.AlertmanagerSpec, 0)
for i, instance := range (&spec.AlertManagerComponent{Topology: topo}).Instances() {
if deleted.Exist(instance.ID()) {
continue
}
alertmanagers = append(alertmanagers, topo.Alertmanagers[i])
}
topo.Alertmanagers = alertmanagers
return dmspec.GetSpecManager().SaveMeta(u.cluster, u.metadata)
}
// Rollback implements the Task interface
func (u *UpdateDMMeta) Rollback(ctx context.Context) error {
return dmspec.GetSpecManager().SaveMeta(u.cluster, u.metadata)
}
// String implements the fmt.Stringer interface
func (u *UpdateDMMeta) String() string {
return fmt.Sprintf("UpdateMeta: cluster=%s, deleted=`'%s'`", u.cluster, strings.Join(u.deletedNodesID, "','"))
}
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