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kube-proxy

Synopsis

The Kubernetes network proxy runs on each node. This reflects services as defined in the Kubernetes API on each node and can do simple TCP, UDP, and SCTP stream forwarding or round robin TCP, UDP, and SCTP forwarding across a set of backends. Service cluster IPs and ports are currently found through Docker-links-compatible environment variables specifying ports opened by the service proxy. There is an optional addon that provides cluster DNS for these cluster IPs. The user must create a service with the apiserver API to configure the proxy.

kube-proxy [flags]

Options

--add_dir_header

If true, adds the file directory to the header of the log messages

--alsologtostderr

log to standard error as well as files

--bind-address string     Default: 0.0.0.0

The IP address for the proxy server to serve on (set to '0.0.0.0' for all IPv4 interfaces and '::' for all IPv6 interfaces). This parameter is ignored if a config file is specified by --config.

--bind-address-hard-fail

If true kube-proxy will treat failure to bind to a port as fatal and exit

--boot_id_file string     Default: "/proc/sys/kernel/random/boot_id"

Comma-separated list of files to check for boot-id. Use the first one that exists.

--cleanup

If true cleanup iptables and ipvs rules and exit.

--cluster-cidr string

The CIDR range of pods in the cluster. When configured, traffic sent to a Service cluster IP from outside this range will be masqueraded and traffic sent from pods to an external LoadBalancer IP will be directed to the respective cluster IP instead. For dual-stack clusters, a comma-separated list is accepted with at least one CIDR per IP family (IPv4 and IPv6). This parameter is ignored if a config file is specified by --config.

--config string

The path to the configuration file.

--config-sync-period duration     Default: 15m0s

How often configuration from the apiserver is refreshed. Must be greater than 0.

--conntrack-max-per-core int32     Default: 32768

Maximum number of NAT connections to track per CPU core (0 to leave the limit as-is and ignore conntrack-min).

--conntrack-min int32     Default: 131072

Minimum number of conntrack entries to allocate, regardless of conntrack-max-per-core (set conntrack-max-per-core=0 to leave the limit as-is).

--conntrack-tcp-timeout-close-wait duration     Default: 1h0m0s

NAT timeout for TCP connections in the CLOSE_WAIT state

--conntrack-tcp-timeout-established duration     Default: 24h0m0s

Idle timeout for established TCP connections (0 to leave as-is)

--detect-local-mode LocalMode

Mode to use to detect local traffic. This parameter is ignored if a config file is specified by --config.

--feature-gates <comma-separated 'key=True|False' pairs>

A set of key=value pairs that describe feature gates for alpha/experimental features. Options are:
APIListChunking=true|false (BETA - default=true)
APIPriorityAndFairness=true|false (BETA - default=true)
APIResponseCompression=true|false (BETA - default=true)
APIServerIdentity=true|false (ALPHA - default=false)
APIServerTracing=true|false (ALPHA - default=false)
AllAlpha=true|false (ALPHA - default=false)
AllBeta=true|false (BETA - default=false)
AnyVolumeDataSource=true|false (BETA - default=true)
AppArmor=true|false (BETA - default=true)
CPUManager=true|false (BETA - default=true)
CPUManagerPolicyAlphaOptions=true|false (ALPHA - default=false)
CPUManagerPolicyBetaOptions=true|false (BETA - default=true)
CPUManagerPolicyOptions=true|false (BETA - default=true)
CSIInlineVolume=true|false (BETA - default=true)
CSIMigration=true|false (BETA - default=true)
CSIMigrationAWS=true|false (BETA - default=true)
CSIMigrationAzureFile=true|false (BETA - default=true)
CSIMigrationGCE=true|false (BETA - default=true)
CSIMigrationPortworx=true|false (ALPHA - default=false)
CSIMigrationRBD=true|false (ALPHA - default=false)
CSIMigrationvSphere=true|false (BETA - default=false)
CSIVolumeHealth=true|false (ALPHA - default=false)
CronJobTimeZone=true|false (ALPHA - default=false)
CustomCPUCFSQuotaPeriod=true|false (ALPHA - default=false)
CustomResourceValidationExpressions=true|false (ALPHA - default=false)
DaemonSetUpdateSurge=true|false (BETA - default=true)
DelegateFSGroupToCSIDriver=true|false (BETA - default=true)
DevicePlugins=true|false (BETA - default=true)
DisableAcceleratorUsageMetrics=true|false (BETA - default=true)
DisableCloudProviders=true|false (ALPHA - default=false)
DisableKubeletCloudCredentialProviders=true|false (ALPHA - default=false)
DownwardAPIHugePages=true|false (BETA - default=true)
EndpointSliceTerminatingCondition=true|false (BETA - default=true)
EphemeralContainers=true|false (BETA - default=true)
ExpandedDNSConfig=true|false (ALPHA - default=false)
ExperimentalHostUserNamespaceDefaulting=true|false (BETA - default=false)
GRPCContainerProbe=true|false (BETA - default=true)
GracefulNodeShutdown=true|false (BETA - default=true)
GracefulNodeShutdownBasedOnPodPriority=true|false (BETA - default=true)
HPAContainerMetrics=true|false (ALPHA - default=false)
HPAScaleToZero=true|false (ALPHA - default=false)
HonorPVReclaimPolicy=true|false (ALPHA - default=false)
IdentifyPodOS=true|false (BETA - default=true)
InTreePluginAWSUnregister=true|false (ALPHA - default=false)
InTreePluginAzureDiskUnregister=true|false (ALPHA - default=false)
InTreePluginAzureFileUnregister=true|false (ALPHA - default=false)
InTreePluginGCEUnregister=true|false (ALPHA - default=false)
InTreePluginOpenStackUnregister=true|false (ALPHA - default=false)
InTreePluginPortworxUnregister=true|false (ALPHA - default=false)
InTreePluginRBDUnregister=true|false (ALPHA - default=false)
InTreePluginvSphereUnregister=true|false (ALPHA - default=false)
JobMutableNodeSchedulingDirectives=true|false (BETA - default=true)
JobReadyPods=true|false (BETA - default=true)
JobTrackingWithFinalizers=true|false (BETA - default=false)
KubeletCredentialProviders=true|false (BETA - default=true)
KubeletInUserNamespace=true|false (ALPHA - default=false)
KubeletPodResources=true|false (BETA - default=true)
KubeletPodResourcesGetAllocatable=true|false (BETA - default=true)
LegacyServiceAccountTokenNoAutoGeneration=true|false (BETA - default=true)
LocalStorageCapacityIsolation=true|false (BETA - default=true)
LocalStorageCapacityIsolationFSQuotaMonitoring=true|false (ALPHA - default=false)
LogarithmicScaleDown=true|false (BETA - default=true)
MaxUnavailableStatefulSet=true|false (ALPHA - default=false)
MemoryManager=true|false (BETA - default=true)
MemoryQoS=true|false (ALPHA - default=false)
MinDomainsInPodTopologySpread=true|false (ALPHA - default=false)
MixedProtocolLBService=true|false (BETA - default=true)
NetworkPolicyEndPort=true|false (BETA - default=true)
NetworkPolicyStatus=true|false (ALPHA - default=false)
NodeOutOfServiceVolumeDetach=true|false (ALPHA - default=false)
NodeSwap=true|false (ALPHA - default=false)
OpenAPIEnums=true|false (BETA - default=true)
OpenAPIV3=true|false (BETA - default=true)
PodAndContainerStatsFromCRI=true|false (ALPHA - default=false)
PodDeletionCost=true|false (BETA - default=true)
PodSecurity=true|false (BETA - default=true)
ProbeTerminationGracePeriod=true|false (BETA - default=false)
ProcMountType=true|false (ALPHA - default=false)
ProxyTerminatingEndpoints=true|false (ALPHA - default=false)
QOSReserved=true|false (ALPHA - default=false)
ReadWriteOncePod=true|false (ALPHA - default=false)
RecoverVolumeExpansionFailure=true|false (ALPHA - default=false)
RemainingItemCount=true|false (BETA - default=true)
RotateKubeletServerCertificate=true|false (BETA - default=true)
SeccompDefault=true|false (ALPHA - default=false)
ServerSideFieldValidation=true|false (ALPHA - default=false)
ServiceIPStaticSubrange=true|false (ALPHA - default=false)
ServiceInternalTrafficPolicy=true|false (BETA - default=true)
SizeMemoryBackedVolumes=true|false (BETA - default=true)
StatefulSetAutoDeletePVC=true|false (ALPHA - default=false)
StatefulSetMinReadySeconds=true|false (BETA - default=true)
StorageVersionAPI=true|false (ALPHA - default=false)
StorageVersionHash=true|false (BETA - default=true)
TopologyAwareHints=true|false (BETA - default=true)
TopologyManager=true|false (BETA - default=true)
VolumeCapacityPriority=true|false (ALPHA - default=false)
WinDSR=true|false (ALPHA - default=false)
WinOverlay=true|false (BETA - default=true)
WindowsHostProcessContainers=true|false (BETA - default=true)This parameter is ignored if a config file is specified by --config.

--healthz-bind-address ipport     Default: 0.0.0.0:10256

The IP address with port for the health check server to serve on (set to '0.0.0.0:10256' for all IPv4 interfaces and '[::]:10256' for all IPv6 interfaces). Set empty to disable. This parameter is ignored if a config file is specified by --config.

-h, --help

help for kube-proxy

--hostname-override string

If non-empty, will use this string as identification instead of the actual hostname.

--iptables-masquerade-bit int32     Default: 14

If using the pure iptables proxy, the bit of the fwmark space to mark packets requiring SNAT with. Must be within the range [0, 31].

--iptables-min-sync-period duration     Default: 1s

The minimum interval of how often the iptables rules can be refreshed as endpoints and services change (e.g. '5s', '1m', '2h22m').

--iptables-sync-period duration     Default: 30s

The maximum interval of how often iptables rules are refreshed (e.g. '5s', '1m', '2h22m'). Must be greater than 0.

--ipvs-exclude-cidrs strings

A comma-separated list of CIDR's which the ipvs proxier should not touch when cleaning up IPVS rules.

--ipvs-min-sync-period duration

The minimum interval of how often the ipvs rules can be refreshed as endpoints and services change (e.g. '5s', '1m', '2h22m').

--ipvs-scheduler string

The ipvs scheduler type when proxy mode is ipvs

--ipvs-strict-arp

Enable strict ARP by setting arp_ignore to 1 and arp_announce to 2

--ipvs-sync-period duration     Default: 30s

The maximum interval of how often ipvs rules are refreshed (e.g. '5s', '1m', '2h22m'). Must be greater than 0.

--ipvs-tcp-timeout duration

The timeout for idle IPVS TCP connections, 0 to leave as-is. (e.g. '5s', '1m', '2h22m').

--ipvs-tcpfin-timeout duration

The timeout for IPVS TCP connections after receiving a FIN packet, 0 to leave as-is. (e.g. '5s', '1m', '2h22m').

--ipvs-udp-timeout duration

The timeout for IPVS UDP packets, 0 to leave as-is. (e.g. '5s', '1m', '2h22m').

--kube-api-burst int32     Default: 10

Burst to use while talking with kubernetes apiserver

--kube-api-content-type string     Default: "application/vnd.kubernetes.protobuf"

Content type of requests sent to apiserver.

--kube-api-qps float     Default: 5

QPS to use while talking with kubernetes apiserver

--kubeconfig string

Path to kubeconfig file with authorization information (the master location can be overridden by the master flag).

--log_backtrace_at <a string in the form 'file:N'>     Default: :0

when logging hits line file:N, emit a stack trace

--log_dir string

If non-empty, write log files in this directory

--log_file string

If non-empty, use this log file

--log_file_max_size uint     Default: 1800

Defines the maximum size a log file can grow to. Unit is megabytes. If the value is 0, the maximum file size is unlimited.

--logtostderr     Default: true

log to standard error instead of files

--machine_id_file string     Default: "/etc/machine-id,/var/lib/dbus/machine-id"

Comma-separated list of files to check for machine-id. Use the first one that exists.

--masquerade-all

If using the pure iptables proxy, SNAT all traffic sent via Service cluster IPs (this not commonly needed)

--master string

The address of the Kubernetes API server (overrides any value in kubeconfig)

--metrics-bind-address ipport     Default: 127.0.0.1:10249

The IP address with port for the metrics server to serve on (set to '0.0.0.0:10249' for all IPv4 interfaces and '[::]:10249' for all IPv6 interfaces). Set empty to disable. This parameter is ignored if a config file is specified by --config.

--nodeport-addresses strings

A string slice of values which specify the addresses to use for NodePorts. Values may be valid IP blocks (e.g. 1.2.3.0/24, 1.2.3.4/32). The default empty string slice ([]) means to use all local addresses. This parameter is ignored if a config file is specified by --config.

--one_output

If true, only write logs to their native severity level (vs also writing to each lower severity level)

--oom-score-adj int32     Default: -999

The oom-score-adj value for kube-proxy process. Values must be within the range [-1000, 1000]. This parameter is ignored if a config file is specified by --config.

--pod-bridge-interface string

A bridge interface name in the cluster. Kube-proxy considers traffic as local if originating from an interface which matches the value. This argument should be set if DetectLocalMode is set to BridgeInterface.

--pod-interface-name-prefix string

An interface prefix in the cluster. Kube-proxy considers traffic as local if originating from interfaces that match the given prefix. This argument should be set if DetectLocalMode is set to InterfaceNamePrefix.

--profiling

If true enables profiling via web interface on /debug/pprof handler. This parameter is ignored if a config file is specified by --config.

--proxy-mode ProxyMode

Which proxy mode to use: 'iptables' (Linux-only), 'ipvs' (Linux-only), 'kernelspace' (Windows-only), or 'userspace' (Linux/Windows, deprecated). The default value is 'iptables' on Linux and 'userspace' on Windows.This parameter is ignored if a config file is specified by --config.

--proxy-port-range port-range

Range of host ports (beginPort-endPort, single port or beginPort+offset, inclusive) that may be consumed in order to proxy service traffic. If (unspecified, 0, or 0-0) then ports will be randomly chosen.

--show-hidden-metrics-for-version string

The previous version for which you want to show hidden metrics. Only the previous minor version is meaningful, other values will not be allowed. The format is <major>.<minor>, e.g.: '1.16'. The purpose of this format is make sure you have the opportunity to notice if the next release hides additional metrics, rather than being surprised when they are permanently removed in the release after that.This parameter is ignored if a config file is specified by --config.

--skip_headers

If true, avoid header prefixes in the log messages

--skip_log_headers

If true, avoid headers when opening log files

--stderrthreshold int     Default: 2

logs at or above this threshold go to stderr

--udp-timeout duration     Default: 250ms

How long an idle UDP connection will be kept open (e.g. '250ms', '2s'). Must be greater than 0. Only applicable for proxy-mode=userspace

-v, --v int

number for the log level verbosity

--version version[=true]

Print version information and quit

--vmodule <comma-separated 'pattern=N' settings>

comma-separated list of pattern=N settings for file-filtered logging

--write-config-to string

If set, write the default configuration values to this file and exit.

Last modified June 08, 2022 at 9:35 PM PST: Fix kube-proxy command line reference (4b5e963781)