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drainer.go
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drainer.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 (
"crypto/tls"
"fmt"
"io/ioutil"
"path/filepath"
"strconv"
"github.com/pingcap/tiup/pkg/cluster/executor"
"github.com/pingcap/tiup/pkg/cluster/template/scripts"
"github.com/pingcap/tiup/pkg/meta"
)
// DrainerSpec represents the Drainer topology specification in topology.yaml
type DrainerSpec struct {
Host string `yaml:"host"`
SSHPort int `yaml:"ssh_port,omitempty" validate:"ssh_port:editable"`
Imported bool `yaml:"imported,omitempty"`
Port int `yaml:"port" default:"8249"`
DeployDir string `yaml:"deploy_dir,omitempty"`
DataDir string `yaml:"data_dir,omitempty"`
LogDir string `yaml:"log_dir,omitempty"`
CommitTS int64 `yaml:"commit_ts,omitempty"`
Offline bool `yaml:"offline,omitempty"`
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 DrainerSpec) Role() string {
return ComponentDrainer
}
// SSH returns the host and SSH port of the instance
func (s DrainerSpec) SSH() (string, int) {
return s.Host, s.SSHPort
}
// GetMainPort returns the main port of the instance
func (s DrainerSpec) GetMainPort() int {
return s.Port
}
// IsImported returns if the node is imported from TiDB-Ansible
func (s DrainerSpec) IsImported() bool {
return s.Imported
}
// DrainerComponent represents Drainer component.
type DrainerComponent struct{ *Specification }
// Name implements Component interface.
func (c *DrainerComponent) Name() string {
return ComponentDrainer
}
// Role implements Component interface.
func (c *DrainerComponent) Role() string {
return ComponentDrainer
}
// Instances implements Component interface.
func (c *DrainerComponent) Instances() []Instance {
ins := make([]Instance, 0, len(c.Drainers))
for _, s := range c.Drainers {
s := s
ins = append(ins, &DrainerInstance{BaseInstance{
InstanceSpec: s,
Name: c.Name(),
Host: s.Host,
Port: s.Port,
SSHP: s.SSHPort,
Ports: []int{
s.Port,
},
Dirs: []string{
s.DeployDir,
s.DataDir,
},
StatusFn: func(tlsCfg *tls.Config, _ ...string) string {
scheme := "http"
if tlsCfg != nil {
scheme = "https"
}
url := fmt.Sprintf("%s://%s:%d/status", scheme, s.Host, s.Port)
return statusByURL(url, tlsCfg)
},
}, c.Specification})
}
return ins
}
// DrainerInstance represent the Drainer instance.
type DrainerInstance struct {
BaseInstance
topo *Specification
}
// ScaleConfig deploy temporary config on scaling
func (i *DrainerInstance) ScaleConfig(
e executor.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(e, clusterName, clusterVersion, user, paths)
}
// InitConfig implements Instance interface.
func (i *DrainerInstance) InitConfig(
e executor.Executor,
clusterName,
clusterVersion,
deployUser string,
paths meta.DirPaths,
) error {
if err := i.BaseInstance.InitConfig(e, i.topo.GlobalOptions, deployUser, paths); err != nil {
return err
}
enableTLS := i.topo.GlobalOptions.TLSEnabled
spec := i.InstanceSpec.(DrainerSpec)
cfg := scripts.NewDrainerScript(
i.GetHost()+":"+strconv.Itoa(i.GetPort()),
i.GetHost(),
paths.Deploy,
paths.Data[0],
paths.Log,
).WithPort(spec.Port).WithNumaNode(spec.NumaNode).AppendEndpoints(i.topo.Endpoints(deployUser)...)
cfg.WithCommitTs(spec.CommitTS)
fp := filepath.Join(paths.Cache, fmt.Sprintf("run_drainer_%s_%d.sh", i.GetHost(), i.GetPort()))
if err := cfg.ConfigToFile(fp); err != nil {
return err
}
dst := filepath.Join(paths.Deploy, "scripts", "run_drainer.sh")
if err := e.Transfer(fp, dst, false); err != nil {
return err
}
if _, _, err := e.Execute("chmod +x "+dst, false); err != nil {
return err
}
globalConfig := i.topo.ServerConfigs.Drainer
// merge config files for imported instance
if i.IsImported() {
configPath := ClusterPath(
clusterName,
AnsibleImportedConfigPath,
fmt.Sprintf(
"%s-%s-%d.toml",
i.ComponentName(),
i.GetHost(),
i.GetPort(),
),
)
importConfig, err := ioutil.ReadFile(configPath)
if err != nil {
return err
}
globalConfig, err = mergeImported(importConfig, globalConfig)
if err != nil {
return err
}
}
// set TLS configs
if enableTLS {
if spec.Config == nil {
spec.Config = make(map[string]interface{})
}
spec.Config["security.ssl-ca"] = fmt.Sprintf(
"%s/tls/%s",
paths.Deploy,
TLSCACert,
)
spec.Config["security.ssl-cert"] = fmt.Sprintf(
"%s/tls/%s.crt",
paths.Deploy,
i.Role())
spec.Config["security.ssl-key"] = fmt.Sprintf(
"%s/tls/%s.pem",
paths.Deploy,
i.Role())
}
if err := i.MergeServerConfig(e, globalConfig, spec.Config, paths); err != nil {
return err
}
return checkConfig(e, i.ComponentName(), clusterVersion, i.OS(), i.Arch(), i.ComponentName()+".toml", paths, nil)
}