func NewJoin(cfgPath string, args []string, cfg *kubeadmapi.NodeConfiguration, skipPreFlight bool) (*Join, error) {
fmt.Println("[kubeadm] WARNING: kubeadm is in alpha, please do not use it for production clusters.")
if cfgPath != "" {
b, err := ioutil.ReadFile(cfgPath)
if err != nil {
return nil, fmt.Errorf("unable to read config from %q [%v]", cfgPath, err)
}
if err := runtime.DecodeInto(api.Codecs.UniversalDecoder(), b, cfg); err != nil {
return nil, fmt.Errorf("unable to decode config from %q [%v]", cfgPath, err)
}
}
if !skipPreFlight {
fmt.Println("[preflight] Running pre-flight checks")
// First, check if we're root separately from the other preflight checks and fail fast
if err := preflight.RunRootCheckOnly(); err != nil {
return nil, err
}
// Then continue with the others...
if err := preflight.RunJoinNodeChecks(cfg); err != nil {
return nil, err
}
} else {
fmt.Println("[preflight] Skipping pre-flight checks")
}
// Try to start the kubelet service in case it's inactive
preflight.TryStartKubelet()
return &Join{cfg: cfg}, nil
}
// RunJoin executes worked node provisioning and tries to join an existing cluster.
func RunJoin(out io.Writer, cmd *cobra.Command, args []string, s *kubeadmapi.NodeConfiguration, skipPreFlight bool) error {
// TODO(phase1+) this we are missing args from the help text, there should be a way to tell cobra about it
if !skipPreFlight {
fmt.Println("Running pre-flight checks")
err := preflight.RunJoinNodeChecks()
if err != nil {
return err
}
} else {
fmt.Println("Skipping pre-flight checks")
}
if len(args) == 0 {
return fmt.Errorf("<cmd/join> must specify master IP address (see --help)")
}
s.MasterAddresses = append(s.MasterAddresses, args...)
ok, err := kubeadmutil.UseGivenTokenIfValid(&s.Secrets)
if !ok {
if err != nil {
return fmt.Errorf("<cmd/join> %v (see --help)\n", err)
}
return fmt.Errorf("Must specify --token (see --help)\n")
}
clusterInfo, err := kubenode.RetrieveTrustedClusterInfo(s)
if err != nil {
return err
}
connectionDetails, err := kubenode.EstablishMasterConnection(s, clusterInfo)
if err != nil {
return err
}
kubeconfig, err := kubenode.PerformTLSBootstrap(connectionDetails)
if err != nil {
return err
}
err = kubeadmutil.WriteKubeconfigIfNotExists("kubelet", kubeconfig)
if err != nil {
return err
}
fmt.Fprintf(out, joinDoneMsgf)
return nil
}
func NewJoin(cfgPath string, args []string, cfg *kubeadmapi.NodeConfiguration, skipPreFlight bool) (*Join, error) {
if cfgPath != "" {
b, err := ioutil.ReadFile(cfgPath)
if err != nil {
return nil, fmt.Errorf("unable to read config from %q [%v]", cfgPath, err)
}
if err := runtime.DecodeInto(api.Codecs.UniversalDecoder(), b, cfg); err != nil {
return nil, fmt.Errorf("unable to decode config from %q [%v]", cfgPath, err)
}
}
if len(args) == 0 && len(cfg.MasterAddresses) == 0 {
return nil, fmt.Errorf("must specify master address (see --help)")
}
cfg.MasterAddresses = append(cfg.MasterAddresses, args...)
if len(cfg.MasterAddresses) > 1 {
return nil, fmt.Errorf("Must not specify more than one master address (see --help)")
}
if !skipPreFlight {
fmt.Println("Running pre-flight checks")
err := preflight.RunJoinNodeChecks(cfg)
if err != nil {
return nil, &preflight.PreFlightError{Msg: err.Error()}
}
} else {
fmt.Println("Skipping pre-flight checks")
}
ok, err := kubeadmutil.UseGivenTokenIfValid(&cfg.Secrets)
if !ok {
if err != nil {
return nil, fmt.Errorf("%v (see --help)\n", err)
}
return nil, fmt.Errorf("Must specify --token (see --help)\n")
}
return &Join{cfg: cfg}, nil
}