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tidb.go
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tidb.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 (
"fmt"
"io/ioutil"
"path/filepath"
"github.com/pingcap/tiup/pkg/cluster/executor"
"github.com/pingcap/tiup/pkg/cluster/template/scripts"
"github.com/pingcap/tiup/pkg/meta"
"github.com/pingcap/tiup/pkg/utils"
)
// TiDBSpec represents the TiDB topology specification in topology.yaml
type TiDBSpec struct {
Host string `yaml:"host"`
ListenHost string `yaml:"listen_host,omitempty"`
SSHPort int `yaml:"ssh_port,omitempty"`
Imported bool `yaml:"imported,omitempty"`
Port int `yaml:"port" default:"4000"`
StatusPort int `yaml:"status_port" default:"10080"`
DeployDir string `yaml:"deploy_dir,omitempty"`
LogDir string `yaml:"log_dir,omitempty"`
NumaNode string `yaml:"numa_node,omitempty"`
Config map[string]interface{} `yaml:"config,omitempty"`
ResourceControl meta.ResourceControl `yaml:"resource_control,omitempty"`
Arch string `yaml:"arch,omitempty"`
OS string `yaml:"os,omitempty"`
}
// statusByURL queries current status of the instance by http status api.
func statusByURL(url string) string {
client := utils.NewHTTPClient(statusQueryTimeout, nil)
// body doesn't have any status section needed
body, err := client.Get(url)
if err != nil {
return "Down"
}
if body == nil {
return "Down"
}
return "Up"
}
// Status queries current status of the instance
func (s TiDBSpec) Status(pdList ...string) string {
url := fmt.Sprintf("http://%s:%d/status", s.Host, s.StatusPort)
return statusByURL(url)
}
// Role returns the component role of the instance
func (s TiDBSpec) Role() string {
return ComponentTiDB
}
// SSH returns the host and SSH port of the instance
func (s TiDBSpec) SSH() (string, int) {
return s.Host, s.SSHPort
}
// GetMainPort returns the main port of the instance
func (s TiDBSpec) GetMainPort() int {
return s.Port
}
// IsImported returns if the node is imported from TiDB-Ansible
func (s TiDBSpec) IsImported() bool {
return s.Imported
}
// TiDBComponent represents TiDB component.
type TiDBComponent struct{ *Specification }
// Name implements Component interface.
func (c *TiDBComponent) Name() string {
return ComponentTiDB
}
// Instances implements Component interface.
func (c *TiDBComponent) Instances() []Instance {
ins := make([]Instance, 0, len(c.TiDBServers))
for _, s := range c.TiDBServers {
s := s
ins = append(ins, &TiDBInstance{instance{
InstanceSpec: s,
name: c.Name(),
host: s.Host,
listenHost: s.ListenHost,
port: s.Port,
sshp: s.SSHPort,
topo: c.Specification,
usedPorts: []int{
s.Port,
s.StatusPort,
},
usedDirs: []string{
s.DeployDir,
},
statusFn: s.Status,
}})
}
return ins
}
// TiDBInstance represent the TiDB instance
type TiDBInstance struct {
instance
}
// InitConfig implement Instance interface
func (i *TiDBInstance) InitConfig(e executor.Executor, clusterName, clusterVersion, deployUser string, paths meta.DirPaths) error {
if err := i.instance.InitConfig(e, clusterName, clusterVersion, deployUser, paths); err != nil {
return err
}
spec := i.InstanceSpec.(TiDBSpec)
cfg := scripts.NewTiDBScript(
i.GetHost(),
paths.Deploy,
paths.Log,
).WithPort(spec.Port).WithNumaNode(spec.NumaNode).
WithStatusPort(spec.StatusPort).
AppendEndpoints(i.instance.topo.Endpoints(deployUser)...).
WithListenHost(i.GetListenHost())
fp := filepath.Join(paths.Cache, fmt.Sprintf("run_tidb_%s_%d.sh", i.GetHost(), i.GetPort()))
if err := cfg.ConfigToFile(fp); err != nil {
return err
}
dst := filepath.Join(paths.Deploy, "scripts", "run_tidb.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.instance.topo.ServerConfigs.TiDB
// 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
}
}
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)
}
// ScaleConfig deploy temporary config on scaling
func (i *TiDBInstance) ScaleConfig(e executor.Executor, cluster *Specification, clusterName, clusterVersion, deployUser string, paths meta.DirPaths) error {
s := i.instance.topo
defer func() { i.instance.topo = s }()
i.instance.topo = cluster
return i.InitConfig(e, clusterName, clusterVersion, deployUser, paths)
}