forked from goodrain/rainbond
/
service.go
319 lines (289 loc) · 8.65 KB
/
service.go
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// RAINBOND, Application Management Platform
// Copyright (C) 2014-2017 Goodrain Co., Ltd.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package openresty
import (
"bytes"
"encoding/json"
"fmt"
"net"
"net/http"
"os"
"path"
"strconv"
"strings"
"sync"
"syscall"
"time"
"github.com/goodrain/rainbond/gateway/controller/openresty/nginxcmd"
"github.com/Sirupsen/logrus"
"github.com/golang/glog"
"github.com/goodrain/rainbond/cmd/gateway/option"
"github.com/goodrain/rainbond/gateway/controller/openresty/model"
"github.com/goodrain/rainbond/gateway/controller/openresty/template"
v1 "github.com/goodrain/rainbond/gateway/v1"
"github.com/goodrain/rainbond/util"
)
// OrService handles the business logic of OpenrestyService
type OrService struct {
IsShuttingDown *bool
// stopLock is used to enforce that only a single call to Stop send at
// a given time. We allow stopping through an HTTP endpoint and
// allowing concurrent stoppers leads to stack traces.
stopLock *sync.Mutex
ocfg *option.Config
nginxProgress *os.Process
configManage *template.NginxConfigFileTemplete
}
//CreateOpenrestyService create openresty service
func CreateOpenrestyService(config *option.Config, isShuttingDown *bool) *OrService {
gws := &OrService{
IsShuttingDown: isShuttingDown,
ocfg: config,
}
return gws
}
// Upstream defines a group of servers. Servers can listen on different ports
type Upstream struct {
Name string
Servers []*Server
}
// Server belongs to Upstream
type Server struct {
Host string
Port int32
Weight int
}
// Start starts nginx
func (o *OrService) Start(errCh chan error) error {
logrus.Infof("openresty server starting")
templete, err := template.NewNginxConfigFileTemplete()
if err != nil {
logrus.Errorf("create config template manage failure %s", err.Error())
return err
}
o.configManage = templete
defaultNginxConf := path.Join(o.configManage.GetConfigFileDirPath(), "nginx.conf")
nginxcmd.SetDefaultNginxConf(defaultNginxConf)
// delete the old configuration
if !util.DirIsEmpty(o.configManage.GetConfigFileDirPath()) {
dirs, _ := util.GetDirNameList(o.configManage.GetConfigFileDirPath(), 1)
for _, dir := range dirs {
path := fmt.Sprintf("%s/%s", o.configManage.GetConfigFileDirPath(), dir)
err := os.RemoveAll(path)
if err != nil {
logrus.Warningf("error removing %s: %v", path, err)
} else {
logrus.Debugf("remove old dir %s", path)
}
}
os.RemoveAll(defaultNginxConf)
}
// generate default nginx.conf
nginx := model.NewNginx(*o.ocfg)
nginx.HTTP = model.NewHTTP(o.ocfg)
nginx.Stream = model.NewStream(o.ocfg)
if err := o.configManage.NewNginxTemplate(nginx); err != nil {
logrus.Errorf("init openresty config failure %s", err.Error())
return err
}
logrus.Infof("init openresty config success")
go func() {
for {
logrus.Infof("start openresty progress")
cmd := nginxcmd.CreateNginxCommand()
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Start(); err != nil {
logrus.Errorf("openresty start error: %v", err)
errCh <- err
return
}
o.nginxProgress = cmd.Process
if err := cmd.Wait(); err != nil {
errCh <- err
}
}
}()
return nil
}
// Stop gracefully stops the openresty master process.
func (o *OrService) Stop() error {
// send stop signal to openresty
logrus.Info("Stopping openresty process")
if o.nginxProgress != nil {
if err := o.nginxProgress.Signal(syscall.SIGTERM); err != nil {
return err
}
}
return nil
}
// PersistConfig persists ocfg
func (o *OrService) PersistConfig(conf *v1.Config) error {
l7srv, l4srv := getNgxServer(conf)
// http server
o.configManage.WriteServer(*o.ocfg, "http", "", l7srv...)
// tcp and udp server
o.configManage.WriteServer(*o.ocfg, "stream", "", l4srv...)
// reload nginx
if err := nginxcmd.Reload(); err != nil {
logrus.Errorf("Nginx reloads falure %s", err.Error())
return err
}
logrus.Debug("Nginx reloads successfully.")
return nil
}
// persistUpstreams persists upstreams
func (o *OrService) persistUpstreams(pools []*v1.Pool) error {
streams := make([]model.Backend, 0)
for _, pool := range pools {
var endpoints []model.Endpoint
for _, node := range pool.Nodes {
endpoints = append(endpoints, model.Endpoint{
Address: node.Host,
Port: strconv.Itoa(int(node.Port)),
})
}
streams = append(streams, model.Backend{
Name: pool.Name,
Endpoints: endpoints,
})
}
buf, err := json.Marshal(streams)
if err != nil {
return err
}
conn, err := net.Dial("tcp", fmt.Sprintf("127.0.0.1:%v", o.ocfg.ListenPorts.Stream))
if err != nil {
return err
}
defer conn.Close()
_, err = conn.Write(buf)
if err != nil {
return err
}
_, err = fmt.Fprintf(conn, "\r\n")
if err != nil {
return err
}
logrus.Debug("dynamically update tcp and udp Upstream success")
return nil
}
func getNgxServer(conf *v1.Config) (l7srv []*model.Server, l4srv []*model.Server) {
for _, vs := range conf.L7VS {
server := &model.Server{
Listen: strings.Join(vs.Listening, " "),
Protocol: "HTTP",
ServerName: strings.Replace(vs.ServerName, "tls", "", 1),
// ForceSSLRedirect: vs.ForceSSLRedirect,
OptionValue: map[string]string{
"tenant_id": vs.Namespace,
"service_id": vs.ServiceID,
},
}
if vs.SSLCert != nil {
server.SSLCertificate = vs.SSLCert.CertificatePem
server.SSLCertificateKey = vs.SSLCert.CertificatePem
}
for _, loc := range vs.Locations {
location := &model.Location{
DisableAccessLog: true,
EnableMetrics: true,
Path: loc.Path,
NameCondition: loc.NameCondition,
Proxy: loc.Proxy,
Rewrite: loc.Rewrite,
PathRewrite: false,
DisableProxyPass: loc.DisableProxyPass,
}
server.Locations = append(server.Locations, location)
}
l7srv = append(l7srv, server)
}
for _, vs := range conf.L4VS {
server := &model.Server{
Protocol: string(vs.Protocol),
OptionValue: map[string]string{
"tenant_id": vs.Namespace,
"service_id": vs.ServiceID,
},
UpstreamName: vs.PoolName,
}
server.Listen = strings.Join(vs.Listening, " ")
l4srv = append(l4srv, server)
}
return l7srv, l4srv
}
// UpdatePools updates http upstreams dynamically.
func (o *OrService) UpdatePools(hpools []*v1.Pool, tpools []*v1.Pool) error {
var lock sync.Mutex
lock.Lock()
defer lock.Unlock()
logrus.Debugf("start update pools(tcp pools count %d, http pool count %d)", len(tpools), len(hpools))
if len(tpools) > 0 {
err := o.persistUpstreams(tpools)
if err != nil {
logrus.Warningf("error updating upstream.default.tcp.conf")
}
}
if hpools == nil || len(hpools) == 0 {
return nil
}
var backends []*model.Backend
for _, pool := range hpools {
backends = append(backends, model.CreateBackendByPool(pool))
}
return o.updateBackends(backends)
}
// updateUpstreams updates the upstreams in ngx.shared.dict by post
func (o *OrService) updateBackends(backends []*model.Backend) error {
url := fmt.Sprintf("http://127.0.0.1:%v/config/backends", o.ocfg.ListenPorts.Status)
if err := post(url, backends); err != nil {
return err
}
logrus.Debug("dynamically update http Upstream success")
return nil
}
func post(url string, data interface{}) error {
buf, err := json.Marshal(data)
if err != nil {
return err
}
resp, err := http.Post(url, "application/json", bytes.NewReader(buf))
if err != nil {
return err
}
defer func() {
if err := resp.Body.Close(); err != nil {
glog.Warningf("Error while closing response body:\n%v", err)
}
}()
if resp.StatusCode != http.StatusCreated {
return fmt.Errorf("unexpected error code: %d", resp.StatusCode)
}
return nil
}
// WaitPluginReady waits for nginx to be ready.
func (o *OrService) WaitPluginReady() {
url := fmt.Sprintf("http://127.0.0.1:%v/%s", o.ocfg.ListenPorts.Status, o.ocfg.HealthPath)
for {
resp, err := http.Get(url)
if err == nil && resp.StatusCode == 200 {
logrus.Info("Nginx is ready")
break
}
logrus.Infof("Nginx is not ready yet: %v", err)
time.Sleep(1 * time.Second)
}
}