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cdc.go
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cdc.go
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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 spec
import (
"context"
"crypto/tls"
"fmt"
"path/filepath"
"time"
perrs "github.com/pingcap/errors"
"github.com/pingcap/tiup/pkg/cluster/ctxt"
"github.com/pingcap/tiup/pkg/cluster/template/scripts"
"github.com/pingcap/tiup/pkg/meta"
"github.com/pingcap/tiup/pkg/tidbver"
)
// CDCSpec represents the Drainer topology specification in topology.yaml
type CDCSpec struct {
Host string `yaml:"host"`
SSHPort int `yaml:"ssh_port,omitempty" validate:"ssh_port:editable"`
Imported bool `yaml:"imported,omitempty"`
Patched bool `yaml:"patched,omitempty"`
IgnoreExporter bool `yaml:"ignore_exporter,omitempty"`
Port int `yaml:"port" default:"8300"`
DeployDir string `yaml:"deploy_dir,omitempty"`
DataDir string `yaml:"data_dir,omitempty"`
LogDir string `yaml:"log_dir,omitempty"`
Offline bool `yaml:"offline,omitempty"`
GCTTL int64 `yaml:"gc-ttl,omitempty" validate:"gc-ttl:editable"`
TZ string `yaml:"tz,omitempty" validate:"tz:editable"`
NumaNode string `yaml:"numa_node,omitempty" validate:"numa_node:editable"`
Config map[string]interface{} `yaml:"config,omitempty" validate:"config:ignore"`
ResourceControl meta.ResourceControl `yaml:"resource_control,omitempty" validate:"resource_control:editable"`
Arch string `yaml:"arch,omitempty"`
OS string `yaml:"os,omitempty"`
}
// Role returns the component role of the instance
func (s *CDCSpec) Role() string {
return ComponentCDC
}
// SSH returns the host and SSH port of the instance
func (s *CDCSpec) SSH() (string, int) {
return s.Host, s.SSHPort
}
// GetMainPort returns the main port of the instance
func (s *CDCSpec) GetMainPort() int {
return s.Port
}
// IsImported returns if the node is imported from TiDB-Ansible
func (s *CDCSpec) IsImported() bool {
return s.Imported
}
// IgnoreMonitorAgent returns if the node does not have monitor agents available
func (s *CDCSpec) IgnoreMonitorAgent() bool {
return s.IgnoreExporter
}
// CDCComponent represents CDC component.
type CDCComponent struct{ Topology *Specification }
// Name implements Component interface.
func (c *CDCComponent) Name() string {
return ComponentCDC
}
// Role implements Component interface.
func (c *CDCComponent) Role() string {
return ComponentCDC
}
// Instances implements Component interface.
func (c *CDCComponent) Instances() []Instance {
ins := make([]Instance, 0, len(c.Topology.CDCServers))
for _, s := range c.Topology.CDCServers {
s := s
instance := &CDCInstance{BaseInstance{
InstanceSpec: s,
Name: c.Name(),
Host: s.Host,
Port: s.Port,
SSHP: s.SSHPort,
Ports: []int{
s.Port,
},
Dirs: []string{
s.DeployDir,
},
StatusFn: func(_ context.Context, timeout time.Duration, tlsCfg *tls.Config, _ ...string) string {
return statusByHost(s.Host, s.Port, "/status", timeout, tlsCfg)
},
UptimeFn: func(_ context.Context, timeout time.Duration, tlsCfg *tls.Config) time.Duration {
return UptimeByHost(s.Host, s.Port, timeout, tlsCfg)
},
}, c.Topology}
if s.DataDir != "" {
instance.Dirs = append(instance.Dirs, s.DataDir)
}
ins = append(ins, instance)
}
return ins
}
// CDCInstance represent the CDC instance.
type CDCInstance struct {
BaseInstance
topo Topology
}
// ScaleConfig deploy temporary config on scaling
func (i *CDCInstance) ScaleConfig(
ctx context.Context,
e ctxt.Executor,
topo Topology,
clusterName,
clusterVersion,
user string,
paths meta.DirPaths,
) error {
s := i.topo
defer func() {
i.topo = s
}()
i.topo = mustBeClusterTopo(topo)
return i.InitConfig(ctx, e, clusterName, clusterVersion, user, paths)
}
// InitConfig implements Instance interface.
func (i *CDCInstance) InitConfig(
ctx context.Context,
e ctxt.Executor,
clusterName,
clusterVersion,
deployUser string,
paths meta.DirPaths,
) error {
topo := i.topo.(*Specification)
if err := i.BaseInstance.InitConfig(ctx, e, topo.GlobalOptions, deployUser, paths); err != nil {
return err
}
enableTLS := topo.GlobalOptions.TLSEnabled
spec := i.InstanceSpec.(*CDCSpec)
globalConfig := topo.ServerConfigs.CDC
instanceConfig := spec.Config
if !tidbver.TiCDCSupportConfigFile(clusterVersion) {
if len(globalConfig)+len(instanceConfig) > 0 {
return perrs.New("server_config is only supported with TiCDC version v4.0.13 or later")
}
}
cfg := scripts.NewCDCScript(
i.GetHost(),
paths.Deploy,
paths.Log,
enableTLS,
spec.GCTTL,
spec.TZ,
).WithPort(spec.Port).WithNumaNode(spec.NumaNode).AppendEndpoints(topo.Endpoints(deployUser)...)
// doesn't work
if _, err := i.setTLSConfig(ctx, false, nil, paths); err != nil {
return err
}
if len(paths.Data) != 0 {
cfg = cfg.PatchByVersion(clusterVersion, paths.Data[0])
}
fp := filepath.Join(paths.Cache, fmt.Sprintf("run_cdc_%s_%d.sh", i.GetHost(), i.GetPort()))
if err := cfg.ConfigToFile(fp); err != nil {
return err
}
dst := filepath.Join(paths.Deploy, "scripts", "run_cdc.sh")
if err := e.Transfer(ctx, fp, dst, false, 0, false); err != nil {
return err
}
if _, _, err := e.Execute(ctx, "chmod +x "+dst, false); err != nil {
return err
}
return i.MergeServerConfig(ctx, e, globalConfig, instanceConfig, paths)
}
// setTLSConfig set TLS Config to support enable/disable TLS
func (i *CDCInstance) setTLSConfig(ctx context.Context, enableTLS bool, configs map[string]interface{}, paths meta.DirPaths) (map[string]interface{}, error) {
return nil, nil
}