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)
}
}
agentClient = &fakes.AgentClient{}
agentClient.VerifySyncedCalls.Returns.Errors = []error{nil}
agentRunner = &fakes.AgentRunner{}
agentRunner.RunCalls.Returns.Errors = []error{nil}
serviceDefiner = &fakes.ServiceDefiner{}
confabConfig := config.Config{}
confabConfig.Node = config.ConfigNode{Name: "node", Index: 0}
controller = chaperon.Controller{
AgentClient: agentClient,
AgentRunner: agentRunner,
Retrier: utils.NewRetrier(clock, 10*time.Millisecond),
EncryptKeys: []string{"key 1", "key 2", "key 3"},
Logger: logger,
ConfigDir: "/tmp/config",
ServiceDefiner: serviceDefiner,
Config: confabConfig,
}
})
Describe("ConfigureClient", func() {
It("writes the pid file", func() {
err := controller.ConfigureClient()
Expect(err).NotTo(HaveOccurred())
Expect(agentRunner.WritePIDCall.CallCount).To(Equal(1))
})
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("TryUntil", func() {
var (
clock *fakes.Clock
retrier utils.Retrier
retryDelay time.Duration
timeout utils.Timeout
)
BeforeEach(func() {
clock = &fakes.Clock{}
retryDelay = 0
timeout = utils.NewTimeout(make(chan time.Time))
retrier = utils.NewRetrier(clock, retryDelay)
})
It("retries till the function is succesful within given timeout", func() {
callCount := 0
errorProneFunction := func() error {
callCount++
if callCount < 10 {
return errors.New("some error occurred")
}
return nil
}
err := retrier.TryUntil(timeout, errorProneFunction)
Expect(err).NotTo(HaveOccurred())