func main() {
flagSet := flag.NewFlagSet("flags", flag.ContinueOnError)
flagSet.Var(&recursors, "recursor", "specifies the address of an upstream DNS `server`, may be specified multiple times")
flagSet.StringVar(&configFile, "config-file", "", "specifies the config `file`")
flagSet.BoolVar(&foreground, "foreground", false, "if true confab will wait for consul to exit")
if len(os.Args) < 2 {
printUsageAndExit("invalid number of arguments", flagSet)
}
if err := flagSet.Parse(os.Args[2:]); err != nil {
os.Exit(1)
}
configFileContents, err := ioutil.ReadFile(configFile)
if err != nil {
stderr.Printf("error reading configuration file: %s", err)
os.Exit(1)
}
cfg, err := config.ConfigFromJSON(configFileContents)
if err != nil {
stderr.Printf("error reading configuration file: %s", err)
os.Exit(1)
}
path, err := exec.LookPath(cfg.Path.AgentPath)
if err != nil {
printUsageAndExit(fmt.Sprintf("\"agent_path\" %q cannot be found", cfg.Path.AgentPath), flagSet)
}
if len(cfg.Path.PIDFile) == 0 {
printUsageAndExit("\"pid_file\" cannot be empty", flagSet)
}
logger := lager.NewLogger("confab")
logger.RegisterSink(lager.NewWriterSink(os.Stdout, lager.INFO))
agentRunner := &agent.Runner{
Path: path,
PIDFile: cfg.Path.PIDFile,
ConfigDir: cfg.Path.ConsulConfigDir,
Recursors: recursors,
Stdout: os.Stdout,
Stderr: os.Stderr,
Logger: logger,
}
consulAPIClient, err := api.NewClient(api.DefaultConfig())
if err != nil {
panic(err) // not tested, NewClient never errors
}
agentClient := &agent.Client{
ExpectedMembers: cfg.Consul.Agent.Servers.LAN,
ConsulAPIAgent: consulAPIClient.Agent(),
ConsulRPCClient: nil,
Logger: logger,
}
retrier := utils.NewRetrier(clock.NewClock(), 1*time.Second)
controller := chaperon.Controller{
AgentRunner: agentRunner,
AgentClient: agentClient,
Retrier: retrier,
EncryptKeys: cfg.Consul.EncryptKeys,
Logger: logger,
ServiceDefiner: config.ServiceDefiner{logger},
ConfigDir: cfg.Path.ConsulConfigDir,
Config: cfg,
}
keyringRemover := chaperon.NewKeyringRemover(cfg.Path.KeyringFile, logger)
configWriter := chaperon.NewConfigWriter(cfg.Path.ConsulConfigDir, logger)
var r runner = chaperon.NewClient(controller, consulagent.NewRPCClient, keyringRemover, configWriter)
if controller.Config.Consul.Agent.Mode == "server" {
bootstrapChecker := chaperon.NewBootstrapChecker(logger, agentClient, status.Client{ConsulAPIStatus: consulAPIClient.Status()}, time.Sleep)
r = chaperon.NewServer(controller, configWriter, consulagent.NewRPCClient, bootstrapChecker)
}
switch os.Args[1] {
case "start":
_, err = os.Stat(controller.Config.Path.ConsulConfigDir)
if err != nil {
printUsageAndExit(fmt.Sprintf("\"consul_config_dir\" %q could not be found",
controller.Config.Path.ConsulConfigDir), flagSet)
}
if utils.IsRunningProcess(agentRunner.PIDFile) {
stderr.Println("consul_agent is already running, please stop it first")
os.Exit(1)
}
if len(agentClient.ExpectedMembers) == 0 {
printUsageAndExit("at least one \"expected-member\" must be provided", flagSet)
}
timeout := utils.NewTimeout(time.After(time.Duration(controller.Config.Confab.TimeoutInSeconds) * time.Second))
if err := r.Start(cfg, timeout); err != nil {
stderr.Printf("error during start: %s", err)
r.Stop()
os.Exit(1)
}
if foreground {
if err := agentRunner.Wait(); err != nil {
stderr.Printf("error during wait: %s", err)
r.Stop()
os.Exit(1)
}
}
case "stop":
if err := r.Stop(); err != nil {
stderr.Printf("error during stop: %s", err)
os.Exit(1)
}
default:
printUsageAndExit(fmt.Sprintf("invalid COMMAND %q", os.Args[1]), flagSet)
}
}
"wan": ["wan-server1", "wan-server2", "wan-server3"]
},
"dns_config": {
"allow_stale": true,
"max_stale": "15s",
"recursor_timeout": "15s"
}
},
"encrypt_keys": ["key-1", "key-2"]
},
"confab": {
"timeout_in_seconds": 30
}
}`)
cfg, err := config.ConfigFromJSON(json)
Expect(err).NotTo(HaveOccurred())
Expect(cfg).To(Equal(config.Config{
Path: config.ConfigPath{
AgentPath: "/path/to/agent",
ConsulConfigDir: "/consul/config/dir",
PIDFile: "/path/to/pidfile",
KeyringFile: "/path/to/keyring",
DataDir: "/path/to/data/dir",
},
Node: config.ConfigNode{
Name: "nodename",
Index: 1234,
ExternalIP: "10.0.0.1",
},
Consul: config.ConfigConsul{