kubernetes: k8s.io/kubernetes/pkg/proxy/util Index | Files | Directories

package util

import "k8s.io/kubernetes/pkg/proxy/util"

Index

Package Files

endpoints.go network.go port.go utils.go

Constants

❖
const (
    // IPv4ZeroCIDR is the CIDR block for the whole IPv4 address space
    IPv4ZeroCIDR = "0.0.0.0/0"

    // IPv6ZeroCIDR is the CIDR block for the whole IPv6 address space
    IPv6ZeroCIDR = "::/0"
)

Variables

❖
var (
    // ErrAddressNotAllowed indicates the address is not allowed
    ErrAddressNotAllowed = errors.New("address not allowed")

    // ErrNoAddresses indicates there are no addresses for the hostname
    ErrNoAddresses = errors.New("No addresses for hostname")
)

func AppendPortIfNeeded Uses

❖
func AppendPortIfNeeded(addr string, port int32) string

AppendPortIfNeeded appends the given port to IP address unless it is already in "ipv4:port" or "[ipv6]:port" format.

func BuildPortsToEndpointsMap Uses

❖
func BuildPortsToEndpointsMap(endpoints *v1.Endpoints) map[string][]string

BuildPortsToEndpointsMap builds a map of portname -> all ip:ports for that portname. Explode Endpoints.Subsets[*] into this structure.

func EnsureSysctl Uses

❖
func EnsureSysctl(sysctl utilsysctl.Interface, name string, newVal int) error

EnsureSysctl sets a kernel sysctl to a given numeric value.

func FilterIncorrectCIDRVersion Uses

❖
func FilterIncorrectCIDRVersion(ipStrings []string, isIPv6Mode bool) ([]string, []string)

FilterIncorrectCIDRVersion filters out the incorrect IP version case from a slice of CIDR strings.

func FilterIncorrectIPVersion Uses

❖
func FilterIncorrectIPVersion(ipStrings []string, isIPv6Mode bool) ([]string, []string)

FilterIncorrectIPVersion filters out the incorrect IP version case from a slice of IP strings.

func GetLocalAddrs Uses

❖
func GetLocalAddrs() ([]net.IP, error)

GetLocalAddrs returns a list of all network addresses on the local system

func GetNodeAddresses Uses

❖
func GetNodeAddresses(cidrs []string, nw NetworkInterfacer) (sets.String, error)

GetNodeAddresses return all matched node IP addresses based on given cidr slice. Some callers, e.g. IPVS proxier, need concrete IPs, not ranges, which is why this exists. NetworkInterfacer is injected for test purpose. We expect the cidrs passed in is already validated. Given an empty input `[]`, it will return `0.0.0.0/0` and `::/0` directly. If multiple cidrs is given, it will return the minimal IP sets, e.g. given input `[1.2.0.0/16, 0.0.0.0/0]`, it will only return `0.0.0.0/0`. NOTE: GetNodeAddresses only accepts CIDRs, if you want concrete IPs, e.g. 1.2.3.4, then the input should be 1.2.3.4/32.

func IPPart Uses

❖
func IPPart(s string) string

IPPart returns just the IP part of an IP or IP:port or endpoint string. If the IP part is an IPv6 address enclosed in brackets (e.g. "[fd00:1::5]:9999"), then the brackets are stripped as well.

func IsProxyableHostname Uses

❖
func IsProxyableHostname(ctx context.Context, resolv Resolver, hostname string) error

IsProxyableHostname checks if the IP addresses for a given hostname are permitted to be proxied

func IsProxyableIP Uses

❖
func IsProxyableIP(ip string) error

IsProxyableIP checks if a given IP address is permitted to be proxied

func IsZeroCIDR Uses

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func IsZeroCIDR(cidr string) bool

IsZeroCIDR checks whether the input CIDR string is either the IPv4 or IPv6 zero CIDR

func LogAndEmitIncorrectIPVersionEvent Uses

❖
func LogAndEmitIncorrectIPVersionEvent(recorder record.EventRecorder, fieldName, fieldValue, svcNamespace, svcName string, svcUID types.UID)

LogAndEmitIncorrectIPVersionEvent logs and emits incorrect IP version event.

func PortPart Uses

❖
func PortPart(s string) (int, error)

PortPart returns just the port part of an endpoint string.

func RevertPorts Uses

❖
func RevertPorts(replacementPortsMap, originalPortsMap map[LocalPort]Closeable)

RevertPorts is closing ports in replacementPortsMap but not in originalPortsMap. In other words, it only closes the ports opened in this sync.

func ShouldSkipService Uses

❖
func ShouldSkipService(svcName types.NamespacedName, service *v1.Service) bool

ShouldSkipService checks if a given service should skip proxying

func ShuffleStrings Uses

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func ShuffleStrings(s []string) []string

ShuffleStrings copies strings from the specified slice into a copy in random order. It returns a new slice.

func ToCIDR Uses

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func ToCIDR(ip net.IP) string

ToCIDR returns a host address of the form <ip-address>/32 for IPv4 and <ip-address>/128 for IPv6

type Closeable Uses

❖
type Closeable interface {
    Close() error
}

Closeable is an interface around closing a port.

type LocalPort Uses

❖
type LocalPort struct {
    // Description is the identity message of a given local port.
    Description string
    // IP is the IP address part of a given local port.
    // If this string is empty, the port binds to all local IP addresses.
    IP  string
    // Port is the port part of a given local port.
    Port int
    // Protocol is the protocol part of a given local port.
    // The value is assumed to be lower-case. For example, "udp" not "UDP", "tcp" not "TCP".
    Protocol string
}

LocalPort describes a port on specific IP address and protocol

func (*LocalPort) String Uses

❖
func (lp *LocalPort) String() string

type NetworkInterfacer Uses

❖
type NetworkInterfacer interface {
    Addrs(intf *net.Interface) ([]net.Addr, error)
    Interfaces() ([]net.Interface, error)
}

NetworkInterfacer defines an interface for several net library functions. Production code will forward to net library functions, and unit tests will override the methods for testing purposes.

type PortOpener Uses

❖
type PortOpener interface {
    OpenLocalPort(lp *LocalPort, isIPv6 bool) (Closeable, error)
}

PortOpener is an interface around port opening/closing. Abstracted out for testing.

type RealNetwork Uses

❖
type RealNetwork struct{}

RealNetwork implements the NetworkInterfacer interface for production code, just wrapping the underlying net library function calls.

func (RealNetwork) Addrs Uses

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func (RealNetwork) Addrs(intf *net.Interface) ([]net.Addr, error)

Addrs wraps net.Interface.Addrs(), it's a part of NetworkInterfacer interface.

func (RealNetwork) Interfaces Uses

❖
func (RealNetwork) Interfaces() ([]net.Interface, error)

Interfaces wraps net.Interfaces(), it's a part of NetworkInterfacer interface.

type Resolver Uses

❖
type Resolver interface {
    LookupIPAddr(ctx context.Context, host string) ([]net.IPAddr, error)
}

Resolver is an interface for net.Resolver

Directories

PathSynopsis
iptables
testing

Package util imports 14 packages (graph) and is imported by 85 packages. Updated 2020-05-21. Refresh now. Tools for package owners.