// 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, iptables iptables.Interface, pr util.PortRange) (*Proxier, error) {
if listenIP.Equal(localhostIPv4) || listenIP.Equal(localhostIPv6) {
return nil, ErrProxyOnLocalhost
}
hostIP, err := util.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, iptables, hostIP, proxyPorts)
}
// setDefaults fills in any fields not set that are required to have valid data.
func setDefaults(c *Config) {
if c.ServiceClusterIPRange == nil {
defaultNet := "10.0.0.0/24"
glog.Warningf("Network range for service cluster IPs is unspecified. Defaulting to %v.", defaultNet)
_, serviceClusterIPRange, err := net.ParseCIDR(defaultNet)
if err != nil {
glog.Fatalf("Unable to parse CIDR: %v", err)
}
if size := ipallocator.RangeSize(serviceClusterIPRange); size < 8 {
glog.Fatalf("The service cluster IP range must be at least %d IP addresses", 8)
}
c.ServiceClusterIPRange = serviceClusterIPRange
}
if c.ServiceNodePortRange.Size == 0 {
// TODO: Currently no way to specify an empty range (do we need to allow this?)
// We should probably allow this for clouds that don't require NodePort to do load-balancing (GCE)
// but then that breaks the strict nestedness of ServiceType.
// Review post-v1
defaultServiceNodePortRange := util.PortRange{Base: 30000, Size: 2768}
c.ServiceNodePortRange = defaultServiceNodePortRange
glog.Infof("Node port range unspecified. Defaulting to %v.", c.ServiceNodePortRange)
}
if c.MasterCount == 0 {
// Clearly, there will be at least one master.
c.MasterCount = 1
}
if c.ReadWritePort == 0 {
c.ReadWritePort = 6443
}
if c.CacheTimeout == 0 {
c.CacheTimeout = 5 * time.Second
}
for c.PublicAddress == nil || c.PublicAddress.IsUnspecified() {
// TODO: This should be done in the caller and just require a
// valid value to be passed in.
hostIP, err := util.ChooseHostInterface()
if err != nil {
glog.Fatalf("Unable to find suitable network address.error='%v' . "+
"Will try again in 5 seconds. Set the public address directly to avoid this wait.", err)
time.Sleep(5 * time.Second)
}
c.PublicAddress = hostIP
glog.Infof("Will report %v as public IP address.", c.PublicAddress)
}
if c.RequestContextMapper == nil {
c.RequestContextMapper = api.NewRequestContextMapper()
}
}