func initClientSet() (*engine.ClientSet, error) {
clientSet := engine.NewClientSet()
err := common.CreateConsulAPIClient(config.AppConfig().Consul.ConfigJsonFile, config.AppConfig().Consul.Port)
if err != nil {
return nil, err
}
clientSet.Add(common.ConsulAPIClient)
err = common.CreateDockerAPIClient(config.AppConfig().DockerEndpoint)
if err != nil {
return nil, err
}
err = clientSet.Add(common.DockerAPIClient)
return clientSet, err
}
func Start() {
if !config.AppConfig().Http.Enabled {
return
}
addr := config.AppConfig().Http.Listen
if addr == "" {
return
}
server := &http.Server{
Addr: addr,
Handler: initRouter(),
}
log.Infoln("http listening on ", addr)
log.Fatalln(server.ListenAndServe())
}
func Boot() {
dur := randomNanoSec()
for {
time.Sleep(dur)
heartbeat()
dur = time.Duration(int64(config.AppConfig().Heartbeat)) * time.Second
}
}
func rewriteConfigForCollectd(comp *model.Component, containers []*Container) error {
log.Infoln("rewrite configuration file ", comp.Name)
// 1. Load configuration file.
c := &cfg_collected.Config{}
_, err := toml.DecodeFile(comp.ConfigFilepath, c)
if err != nil {
return err
}
// 2. Change the configuration content.
inputConfig := &cfg_collected.InputConfig{
Enabled: true,
Interval: DefaultInterval,
SubInput: make([]*cfg_collected.InputConfig, len(containers)),
}
for i, ctn := range containers {
serviceType := strings.Split(path.Base(ctn.Image), ":")[0]
var interval int
itv, ok := config.AppConfig().Intervals[serviceType]
if !ok {
log.Warnf("service %s hasn't config interval, using default %d", serviceType, DefaultInterval)
interval = DefaultInterval
} else {
interval = itv.Value
}
subConfig := &cfg_collected.InputConfig{
Enabled: true,
Interval: interval,
Tags: fmt.Sprintf("cid:%s", ctn.ID),
}
inputConfig.SubInput[i] = subConfig
}
c.Input["container"] = inputConfig
// 3. Rewrite the configuration file.
buf := bytes.NewBuffer(nil)
encoder := toml.NewEncoder(buf)
err = encoder.Encode(c)
if err != nil {
return err
}
encoder.Indent = " "
log.Debugln("configuration file path is ", comp.ConfigFilepath)
err = utils.WriteFile(comp.ConfigFilepath, buf.Bytes(), 0644)
return err
}
// Update or create
func heartbeat() {
log.Debugln("heartbeat......")
log.Debugln("stackDir is ", stackDir)
localComps := LocalComponents()
hbtRequest, err := buildHeartbeatRequest()
if err != nil {
log.Errorln(err)
return
}
hbtRequest.RemoteComponents = localComps
log.Infoln("request: ", hbtRequest)
// http request to server heartbeat url.
if config.AppConfig().Server == "" {
log.Errorln("configuration server is blank.")
return
}
heartbeatURL := fmt.Sprintf("http://%s/heartbeat", config.AppConfig().Server)
hbtResponse, err := requestHeartbeat(heartbeatURL, hbtRequest)
if err != nil {
log.Errorln(err)
return
}
log.Infoln("response: ", hbtResponse)
if hbtResponse != nil && hbtResponse.Components != nil {
log.Infoln("response comps : ", hbtResponse.Components)
for _, newComp := range hbtResponse.Components {
newComp.InitAttrs(stackDir)
log.Debugf("newComp: %s", newComp)
// 1. Create version directory. stack_dir/comp_name/version_number/
if utils.IsExist(newComp.VersionDir) {
_, err := utils.ExecCommand(false, "mkdir", "-p", newComp.VersionDir)
if err != nil {
log.Errorln(err)
continue
}
}
// 2. Download new version component.
downURL := fmt.Sprintf("http://%s/%s", config.AppConfig().Server, newComp.TarballFilename)
err = downloadFromURL(newComp.TarballFilepath, downURL)
if err != nil {
log.Errorln(err)
continue
}
// 3. Uncompress the new component file.
output, err := utils.ExecCommand(false, "tar", "-zxf", newComp.TarballFilepath, "-C", newComp.VersionDir)
if err != nil {
log.Errorln(err)
continue
}
log.Debugf("Untar file: %s , output: %s", newComp.TarballFilepath, output)
if newComp.Cmd == "start" {
if view != nil {
containers := view.Data.([]*Container)
switch newComp.Name {
case "dis-collectd":
{
err := rewriteConfigForCollectd(newComp, containers)
if err != nil {
log.Errorln("rewriteConfigForCollectd error: ", err)
continue
}
}
case "logstash-forwarder":
{
err := rewriteConfigForLogstashForwarder(newComp, containers)
if err != nil {
log.Errorln("rewriteConfigForLogstashForwarder error: ", err)
continue
}
}
}
}
log.Debugln("new component DeployFilepath = ", newComp.DeployFilepath)
output, err = utils.ExecCommand(false, newComp.DeployFilepath, "start")
if err != nil {
log.Errorln(err)
continue
}
log.Debugf("Execute command: %s %s, output: %s\n", newComp.DeployFilepath, newComp.Cmd, output)
// Componet directory was existed, then shutdown old verison component.
if utils.IsExist(path.Join(newComp.Directory, ".version")) {
oldVersion_b, err := utils.ReadFile(path.Join(newComp.Directory, ".version"))
if err != nil {
log.Errorln(err)
continue
}
oldDeployFilePath := path.Join(newComp.Directory, strings.TrimSpace(string(oldVersion_b)), "deploy")
_, err = utils.ExecCommand(false, oldDeployFilePath, "stop")
if err != nil {
log.Errorln(err)
continue
}
}
// Write the verion number to .version in the parent directory.
log.Debugln("write version number file, ", newComp.Directory)
err = utils.WriteFile(path.Join(newComp.Directory, ".version"), []byte(newComp.Version), 0644)
if err != nil {
log.Errorln(err)
continue
}
// Register this component to consul.
err = common.ConsulRegister(newComp.Name, newComp.DeployFilepath)
if err != nil {
log.Errorln(err)
continue
}
} else {
log.Debugln("new component DeployFilepath = ", newComp.DeployFilepath)
output, err = utils.ExecCommand(false, newComp.DeployFilepath, newComp.Cmd)
if err != nil {
log.Errorln(err)
continue
}
log.Debugln("Execute command: %s %s, output: %s\n", newComp.DeployFilepath, newComp.Cmd, output)
}
}
}
}
func randomNanoSec() time.Duration {
ns := int64(config.AppConfig().Heartbeat) * 1e9
r := rand.New(rand.NewSource(time.Now().UnixNano()))
return time.Duration(r.Int63n(ns)) * time.Nanosecond
}