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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 instance
import (
"context"
"encoding/pem"
"fmt"
"os"
"path/filepath"
"strings"
"github.com/BurntSushi/toml"
"github.com/pingcap/tiup/pkg/cluster/spec"
"github.com/pingcap/tiup/pkg/crypto"
"github.com/pingcap/tiup/pkg/utils"
)
// TiProxy represent a ticdc instance.
type TiProxy struct {
instance
pds []*PDInstance
Process
}
var _ Instance = &TiProxy{}
// GenTiProxySessionCerts will create a self-signed certs for TiProxy session migration. NOTE that this cert is directly used by TiDB.
func GenTiProxySessionCerts(dir string) error {
if _, err := os.Stat(filepath.Join(dir, "tiproxy.crt")); err == nil {
return nil
}
ca, err := crypto.NewCA("tiproxy")
if err != nil {
return err
}
privKey, err := crypto.NewKeyPair(crypto.KeyTypeRSA, crypto.KeySchemeRSASSAPSSSHA256)
if err != nil {
return err
}
csr, err := privKey.CSR("tiproxy", "tiproxy", nil, nil)
if err != nil {
return err
}
cert, err := ca.Sign(csr)
if err != nil {
return err
}
if err := utils.SaveFileWithBackup(filepath.Join(dir, "tiproxy.key"), privKey.Pem(), ""); err != nil {
return err
}
return utils.SaveFileWithBackup(filepath.Join(dir, "tiproxy.crt"), pem.EncodeToMemory(&pem.Block{
Type: "CERTIFICATE",
Bytes: cert,
}), "")
}
// NewTiProxy create a TiProxy instance.
func NewTiProxy(shOpt SharedOptions, binPath string, dir, host, configPath string, id int, port int, pds []*PDInstance) *TiProxy {
if port <= 0 {
port = 6000
}
tiproxy := &TiProxy{
instance: instance{
BinPath: binPath,
ID: id,
Dir: dir,
Host: host,
Port: utils.MustGetFreePort(host, port, shOpt.PortOffset),
StatusPort: utils.MustGetFreePort(host, 3080, shOpt.PortOffset),
ConfigPath: configPath,
},
pds: pds,
}
return tiproxy
}
// MetricAddr implements Instance interface.
func (c *TiProxy) MetricAddr() (r MetricAddr) {
r.Targets = append(r.Targets, utils.JoinHostPort(c.Host, c.StatusPort))
r.Labels = map[string]string{
"__metrics_path__": "/api/metrics",
}
return
}
// Start implements Instance interface.
func (c *TiProxy) Start(ctx context.Context) error {
endpoints := pdEndpoints(c.pds, false)
configPath := filepath.Join(c.Dir, "config", "proxy.toml")
dir := filepath.Dir(configPath)
if err := utils.MkdirAll(dir, 0755); err != nil {
return err
}
userConfig, err := unmarshalConfig(c.ConfigPath)
if err != nil {
return err
}
if userConfig == nil {
userConfig = make(map[string]any)
}
cf, err := os.Create(configPath)
if err != nil {
return err
}
enc := toml.NewEncoder(cf)
enc.Indent = ""
if err := enc.Encode(spec.MergeConfig(userConfig, map[string]any{
"proxy.pd-addrs": strings.Join(endpoints, ","),
"proxy.addr": utils.JoinHostPort(c.Host, c.Port),
"proxy.advertise-addr": AdvertiseHost(c.Host),
"api.addr": utils.JoinHostPort(c.Host, c.StatusPort),
"log.log-file.filename": c.LogFile(),
})); err != nil {
return err
}
args := []string{
fmt.Sprintf("--config=%s", configPath),
}
c.Process = &process{cmd: PrepareCommand(ctx, c.BinPath, args, nil, c.Dir)}
logIfErr(c.Process.SetOutputFile(c.LogFile()))
return c.Process.Start()
}
// Addr return addresses that can be connected by MySQL clients.
func (c *TiProxy) Addr() string {
return utils.JoinHostPort(AdvertiseHost(c.Host), c.Port)
}
// Component return component name.
func (c *TiProxy) Component() string {
return "tiproxy"
}
// LogFile return the log file.
func (c *TiProxy) LogFile() string {
return filepath.Join(c.Dir, "tiproxy.log")
}
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