func BuildClusterConfig(c *federation_v1beta1.Cluster) (*restclient.Config, error) {
var serverAddress string
var clusterConfig *restclient.Config
hostIP, err := utilnet.ChooseHostInterface()
if err != nil {
return nil, err
}
for _, item := range c.Spec.ServerAddressByClientCIDRs {
_, cidrnet, err := net.ParseCIDR(item.ClientCIDR)
if err != nil {
return nil, err
}
myaddr := net.ParseIP(hostIP.String())
if cidrnet.Contains(myaddr) == true {
serverAddress = item.ServerAddress
break
}
}
if serverAddress != "" {
if c.Spec.SecretRef == nil {
glog.Infof("didn't find secretRef for cluster %s. Trying insecure access", c.Name)
clusterConfig, err = clientcmd.BuildConfigFromFlags(serverAddress, "")
} else {
kubeconfigGetter := KubeconfigGetterForCluster(c)
clusterConfig, err = clientcmd.BuildConfigFromKubeconfigGetter(serverAddress, kubeconfigGetter)
}
if err != nil {
return nil, err
}
clusterConfig.QPS = KubeAPIQPS
clusterConfig.Burst = KubeAPIBurst
}
return clusterConfig, nil
}
func setInitDynamicDefaults(cfg *kubeadmapi.MasterConfiguration) error {
// Auto-detect the IP
if len(cfg.API.AdvertiseAddresses) == 0 {
ip, err := netutil.ChooseHostInterface()
if err != nil {
return err
}
cfg.API.AdvertiseAddresses = []string{ip.String()}
}
// Validate version argument
ver, err := kubeadmutil.KubernetesReleaseVersion(cfg.KubernetesVersion)
if err != nil {
if cfg.KubernetesVersion != kubeadmapiext.DefaultKubernetesVersion {
return err
} else {
ver = kubeadmapiext.DefaultKubernetesFallbackVersion
}
}
cfg.KubernetesVersion = ver
fmt.Println("[init] Using Kubernetes version:", ver)
// Omit the "v" in the beginning, otherwise semver will fail
// If the version is newer than the specified version, RBAC v1beta1 support is enabled in the apiserver so we can default to RBAC
k8sVersion, err := semver.Parse(cfg.KubernetesVersion[1:])
if k8sVersion.GT(allowAllMaxVersion) {
cfg.AuthorizationMode = "RBAC"
}
fmt.Println("[init] Using Authorization mode:", cfg.AuthorizationMode)
// Warn about the limitations with the current cloudprovider solution.
if cfg.CloudProvider != "" {
fmt.Println("[init] WARNING: For cloudprovider integrations to work --cloud-provider must be set for all kubelets in the cluster.")
fmt.Println("\t(/etc/systemd/system/kubelet.service.d/10-kubeadm.conf should be edited for this purpose)")
}
// Validate token if any, otherwise generate
if cfg.Discovery.Token != nil {
if cfg.Discovery.Token.ID != "" && cfg.Discovery.Token.Secret != "" {
fmt.Printf("[init] A token has been provided, validating [%s]\n", kubeadmutil.BearerToken(cfg.Discovery.Token))
if valid, err := kubeadmutil.ValidateToken(cfg.Discovery.Token); valid == false {
return err
}
} else {
fmt.Println("[init] A token has not been provided, generating one")
if err := kubeadmutil.GenerateToken(cfg.Discovery.Token); err != nil {
return err
}
}
// If there aren't any addresses specified, default to the first advertised address which can be user-provided or the default network interface's IP address
if len(cfg.Discovery.Token.Addresses) == 0 {
cfg.Discovery.Token.Addresses = []string{cfg.API.AdvertiseAddresses[0] + ":" + strconv.Itoa(kubeadmapiext.DefaultDiscoveryBindPort)}
}
}
return nil
}
// NewProxier returns a new Proxier given a LoadBalancer and an address on
// which to listen. Because of the iptables logic, It is assumed that there
// is only a single Proxier active on a machine. An error will be returned if
// the proxier cannot be started due to an invalid ListenIP (loopback) or
// if iptables fails to update or acquire the initial lock. Once a proxier is
// created, it will keep iptables up to date in the background and will not
// terminate if a particular iptables call fails.
func NewProxier(loadBalancer LoadBalancer, listenIP net.IP, netsh netsh.Interface, pr utilnet.PortRange, syncPeriod, udpIdleTimeout time.Duration) (*Proxier, error) {
if listenIP.Equal(localhostIPv4) || listenIP.Equal(localhostIPv6) {
return nil, ErrProxyOnLocalhost
}
hostIP, err := utilnet.ChooseHostInterface()
if err != nil {
return nil, fmt.Errorf("failed to select a host interface: %v", err)
}
proxyPorts := newPortAllocator(pr)
glog.V(2).Infof("Setting proxy IP to %v and initializing iptables", hostIP)
return createProxier(loadBalancer, listenIP, netsh, hostIP, proxyPorts, syncPeriod, udpIdleTimeout)
}
// Set IP and hostname addresses for the node.
func (kl *Kubelet) setNodeAddress(node *v1.Node) error {
if kl.nodeIP != nil {
if err := kl.validateNodeIP(); err != nil {
return fmt.Errorf("failed to validate nodeIP: %v", err)
}
glog.V(2).Infof("Using node IP: %q", kl.nodeIP.String())
}
if kl.cloud != nil {
instances, ok := kl.cloud.Instances()
if !ok {
return fmt.Errorf("failed to get instances from cloud provider")
}
// TODO(roberthbailey): Can we do this without having credentials to talk
// to the cloud provider?
// TODO(justinsb): We can if CurrentNodeName() was actually CurrentNode() and returned an interface
// TODO: If IP addresses couldn't be fetched from the cloud provider, should kubelet fallback on the other methods for getting the IP below?
nodeAddresses, err := instances.NodeAddresses(kl.nodeName)
if err != nil {
return fmt.Errorf("failed to get node address from cloud provider: %v", err)
}
if kl.nodeIP != nil {
for _, nodeAddress := range nodeAddresses {
if nodeAddress.Address == kl.nodeIP.String() {
node.Status.Addresses = []v1.NodeAddress{
{Type: nodeAddress.Type, Address: nodeAddress.Address},
{Type: v1.NodeHostName, Address: kl.GetHostname()},
}
return nil
}
}
return fmt.Errorf("failed to get node address from cloud provider that matches ip: %v", kl.nodeIP)
}
// Only add a NodeHostName address if the cloudprovider did not specify one
// (we assume the cloudprovider knows best)
var addressNodeHostName *v1.NodeAddress
for i := range nodeAddresses {
if nodeAddresses[i].Type == v1.NodeHostName {
addressNodeHostName = &nodeAddresses[i]
break
}
}
if addressNodeHostName == nil {
hostnameAddress := v1.NodeAddress{Type: v1.NodeHostName, Address: kl.GetHostname()}
nodeAddresses = append(nodeAddresses, hostnameAddress)
} else {
glog.V(2).Infof("Using Node Hostname from cloudprovider: %q", addressNodeHostName.Address)
}
node.Status.Addresses = nodeAddresses
} else {
var ipAddr net.IP
var err error
// 1) Use nodeIP if set
// 2) If the user has specified an IP to HostnameOverride, use it
// 3) Lookup the IP from node name by DNS and use the first non-loopback ipv4 address
// 4) Try to get the IP from the network interface used as default gateway
if kl.nodeIP != nil {
ipAddr = kl.nodeIP
} else if addr := net.ParseIP(kl.hostname); addr != nil {
ipAddr = addr
} else {
var addrs []net.IP
addrs, err = net.LookupIP(node.Name)
for _, addr := range addrs {
if !addr.IsLoopback() && addr.To4() != nil {
ipAddr = addr
break
}
}
if ipAddr == nil {
ipAddr, err = utilnet.ChooseHostInterface()
}
}
if ipAddr == nil {
// We tried everything we could, but the IP address wasn't fetchable; error out
return fmt.Errorf("can't get ip address of node %s. error: %v", node.Name, err)
} else {
node.Status.Addresses = []v1.NodeAddress{
{Type: v1.NodeLegacyHostIP, Address: ipAddr.String()},
{Type: v1.NodeInternalIP, Address: ipAddr.String()},
{Type: v1.NodeHostName, Address: kl.GetHostname()},
}
}
}
return nil
}
