kube-proxy - Man Page

Eric Paris Jan 2015

Synopsis

kube-proxy [Options]

Description

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.

Options

--allow_dynamic_housekeeping=true Whether to allow the housekeeping interval to be dynamic

--application_metrics_count_limit=100 Max number of application metrics to store (per container)

--azure-container-registry-config="" Path to the file containing Azure container registry configuration information.

--bind-address=0.0.0.0 Overrides kube-proxy's idea of what its node's primary IP is. Note that the name is a historical artifact, and kube-proxy does not actually bind any sockets to this IP. This parameter is ignored if a config file is specified by --config.

--bind-address-hard-fail=false If true kube-proxy will treat failure to bind to a port as fatal and exit

--boot_id_file="/proc/sys/kernel/random/boot_id" Comma-separated list of files to check for boot-id. Use the first one that exists.

--cleanup=false If true cleanup iptables and ipvs rules and exit.

--cloud-provider-gce-l7lb-src-cidrs=130.211.0.0/22,35.191.0.0/16 CIDRs opened in GCE firewall for L7 LB traffic proxy & health checks

--cloud-provider-gce-lb-src-cidrs=130.211.0.0/22,209.85.152.0/22,209.85.204.0/22,35.191.0.0/16 CIDRs opened in GCE firewall for L4 LB traffic proxy & health checks

--cluster-cidr="" The CIDR range of the pods in the cluster. (For dual-stack clusters, this can be a comma-separated dual-stack pair of CIDR ranges.). When --detect-local-mode is set to ClusterCIDR, kube-proxy will consider traffic to be local if its source IP is in this range. (Otherwise it is not used.) This parameter is ignored if a config file is specified by --config.

--config="" The path to the configuration file.

--config-sync-period=15m0s How often configuration from the apiserver is refreshed.  Must be greater than 0.

--conntrack-max-per-core=32768 Maximum number of NAT connections to track per CPU core (0 to leave the limit as-is and ignore conntrack-min).

--conntrack-min=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-be-liberal=false Enable liberal mode for tracking TCP packets by setting nf_conntrack_tcp_be_liberal to 1

--conntrack-tcp-timeout-close-wait=1h0m0s NAT timeout for TCP connections in the CLOSE_WAIT state

--conntrack-tcp-timeout-established=24h0m0s Idle timeout for established TCP connections (0 to leave as-is)

--conntrack-udp-timeout=0s Idle timeout for UNREPLIED UDP connections (0 to leave as-is)

--conntrack-udp-timeout-stream=0s Idle timeout for ASSURED UDP connections (0 to leave as-is)

--container_hints="/etc/cadvisor/container_hints.json" location of the container hints file

--containerd="/run/containerd/containerd.sock" containerd endpoint

--containerd-namespace="k8s.io" containerd namespace

--containerd_env_metadata_whitelist="" DEPRECATED: this flag will be removed, please use
env_metadata_whitelist. A comma-separated list of environment variable keys matched with specified prefix that needs to be collected for containerd containers

--crio_client_timeout=0s CRI-O client timeout. Default is no timeout.

--default-not-ready-toleration-seconds=300 Indicates the tolerationSeconds of the toleration for notReady:NoExecute that is added by default to every pod that does not already have such a toleration.

--default-unreachable-toleration-seconds=300 Indicates the tolerationSeconds of the toleration for unreachable:NoExecute that is added by default to every pod that does not already have such a toleration.

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

--disable_root_cgroup_stats=false Disable collecting root Cgroup stats

--docker_only=false Only report docker containers in addition to root stats

--enable_load_reader=false Whether to enable cpu load reader

--event_storage_age_limit="default=0" Max length of time for which to store events (per type). Value is a comma separated list of key values, where the keys are event types (e.g.: creation, oom) or "default" and the value is a duration. Default is applied to all non-specified event types

--event_storage_event_limit="default=0" Max number of events to store (per type). Value is a comma separated list of key values, where the keys are event types (e.g.: creation, oom) or "default" and the value is an integer. Default is applied to all non-specified event types

--feature-gates= A set of key=value pairs that describe feature gates for alpha/experimental features. Options are: APIResponseCompression=true|false (BETA - default=true) APIServerIdentity=true|false (BETA - default=true) APIServerTracing=true|false (BETA - default=true) AdmissionWebhookMatchConditions=true|false (BETA - default=true) AggregatedDiscoveryEndpoint=true|false (BETA - default=true) AllAlpha=true|false (ALPHA - default=false) AllBeta=true|false (BETA - default=false) AnyVolumeDataSource=true|false (BETA - default=true) AppArmor=true|false (BETA - default=true) CPUManagerPolicyAlphaOptions=true|false (ALPHA - default=false) CPUManagerPolicyBetaOptions=true|false (BETA - default=true) CPUManagerPolicyOptions=true|false (BETA - default=true) CRDValidationRatcheting=true|false (ALPHA - default=false) CSIMigrationPortworx=true|false (BETA - default=false) CSIVolumeHealth=true|false (ALPHA - default=false) CloudControllerManagerWebhook=true|false (ALPHA - default=false) CloudDualStackNodeIPs=true|false (BETA - default=true) ClusterTrustBundle=true|false (ALPHA - default=false) ClusterTrustBundleProjection=true|false (ALPHA - default=false) ComponentSLIs=true|false (BETA - default=true) ConsistentListFromCache=true|false (ALPHA - default=false) ContainerCheckpoint=true|false (ALPHA - default=false) ContextualLogging=true|false (ALPHA - default=false) CronJobsScheduledAnnotation=true|false (BETA - default=true) CrossNamespaceVolumeDataSource=true|false (ALPHA - default=false) CustomCPUCFSQuotaPeriod=true|false (ALPHA - default=false) DevicePluginCDIDevices=true|false (BETA - default=true) DisableCloudProviders=true|false (BETA - default=true) DisableKubeletCloudCredentialProviders=true|false (BETA - default=true) DisableNodeKubeProxyVersion=true|false (ALPHA - default=false) DynamicResourceAllocation=true|false (ALPHA - default=false) ElasticIndexedJob=true|false (BETA - default=true) EventedPLEG=true|false (ALPHA - default=false) GracefulNodeShutdown=true|false (BETA - default=true) GracefulNodeShutdownBasedOnPodPriority=true|false (BETA - default=true) HPAContainerMetrics=true|false (BETA - default=true) HPAScaleToZero=true|false (ALPHA - default=false) HonorPVReclaimPolicy=true|false (ALPHA - default=false) ImageMaximumGCAge=true|false (ALPHA - default=false) InPlacePodVerticalScaling=true|false (ALPHA - default=false) 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) InTreePluginvSphereUnregister=true|false (ALPHA - default=false) JobBackoffLimitPerIndex=true|false (BETA - default=true) JobPodFailurePolicy=true|false (BETA - default=true) JobPodReplacementPolicy=true|false (BETA - default=true) KubeProxyDrainingTerminatingNodes=true|false (ALPHA - default=false) KubeletCgroupDriverFromCRI=true|false (ALPHA - default=false) KubeletInUserNamespace=true|false (ALPHA - default=false) KubeletPodResourcesDynamicResources=true|false (ALPHA - default=false) KubeletPodResourcesGet=true|false (ALPHA - default=false) KubeletSeparateDiskGC=true|false (ALPHA - default=false) KubeletTracing=true|false (BETA - default=true) LegacyServiceAccountTokenCleanUp=true|false (BETA - default=true) LoadBalancerIPMode=true|false (ALPHA - default=false) LocalStorageCapacityIsolationFSQuotaMonitoring=true|false (ALPHA - default=false) LogarithmicScaleDown=true|false (BETA - default=true) LoggingAlphaOptions=true|false (ALPHA - default=false) LoggingBetaOptions=true|false (BETA - default=true) MatchLabelKeysInPodAffinity=true|false (ALPHA - default=false) MatchLabelKeysInPodTopologySpread=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 (BETA - default=true) MultiCIDRServiceAllocator=true|false (ALPHA - default=false) NFTablesProxyMode=true|false (ALPHA - default=false) NewVolumeManagerReconstruction=true|false (BETA - default=true) NodeInclusionPolicyInPodTopologySpread=true|false (BETA - default=true) NodeLogQuery=true|false (ALPHA - default=false) NodeSwap=true|false (BETA - default=false) OpenAPIEnums=true|false (BETA - default=true) PDBUnhealthyPodEvictionPolicy=true|false (BETA - default=true) PersistentVolumeLastPhaseTransitionTime=true|false (BETA - default=true) PodAndContainerStatsFromCRI=true|false (ALPHA - default=false) PodDeletionCost=true|false (BETA - default=true) PodDisruptionConditions=true|false (BETA - default=true) PodHostIPs=true|false (BETA - default=true) PodIndexLabel=true|false (BETA - default=true) PodLifecycleSleepAction=true|false (ALPHA - default=false) PodReadyToStartContainersCondition=true|false (BETA - default=true) PodSchedulingReadiness=true|false (BETA - default=true) ProcMountType=true|false (ALPHA - default=false) QOSReserved=true|false (ALPHA - default=false) RecoverVolumeExpansionFailure=true|false (ALPHA - default=false) RotateKubeletServerCertificate=true|false (BETA - default=true) RuntimeClassInImageCriApi=true|false (ALPHA - default=false) SELinuxMountReadWriteOncePod=true|false (BETA - default=true) SchedulerQueueingHints=true|false (BETA - default=false) SecurityContextDeny=true|false (ALPHA - default=false) SeparateTaintEvictionController=true|false (BETA - default=true) ServiceAccountTokenJTI=true|false (ALPHA - default=false) ServiceAccountTokenNodeBinding=true|false (ALPHA - default=false) ServiceAccountTokenNodeBindingValidation=true|false (ALPHA - default=false) ServiceAccountTokenPodNodeInfo=true|false (ALPHA - default=false) SidecarContainers=true|false (BETA - default=true) SizeMemoryBackedVolumes=true|false (BETA - default=true) StableLoadBalancerNodeSet=true|false (BETA - default=true) StatefulSetAutoDeletePVC=true|false (BETA - default=true) StatefulSetStartOrdinal=true|false (BETA - default=true) StorageVersionAPI=true|false (ALPHA - default=false) StorageVersionHash=true|false (BETA - default=true) StructuredAuthenticationConfiguration=true|false (ALPHA - default=false) StructuredAuthorizationConfiguration=true|false (ALPHA - default=false) TopologyAwareHints=true|false (BETA - default=true) TopologyManagerPolicyAlphaOptions=true|false (ALPHA - default=false) TopologyManagerPolicyBetaOptions=true|false (BETA - default=true) TopologyManagerPolicyOptions=true|false (BETA - default=true) TranslateStreamCloseWebsocketRequests=true|false (ALPHA - default=false) UnauthenticatedHTTP2DOSMitigation=true|false (BETA - default=true) UnknownVersionInteroperabilityProxy=true|false (ALPHA - default=false) UserNamespacesPodSecurityStandards=true|false (ALPHA - default=false) UserNamespacesSupport=true|false (ALPHA - default=false) ValidatingAdmissionPolicy=true|false (BETA - default=false) VolumeAttributesClass=true|false (ALPHA - default=false) VolumeCapacityPriority=true|false (ALPHA - default=false) WatchList=true|false (ALPHA - default=false) WinDSR=true|false (ALPHA - default=false) WinOverlay=true|false (BETA - default=true) WindowsHostNetwork=true|false (ALPHA - default=true) ZeroLimitedNominalConcurrencyShares=true|false (BETA - default=false) This parameter is ignored if a config file is specified by --config.

--global_housekeeping_interval=1m0s Interval between global housekeepings

--healthz-bind-address=0.0.0.0:10256 The IP address and port for the health check server to serve on, defaulting to "0.0.0.0:10256" (if --bind-address is unset or IPv4), or "[::]:10256" (if --bind-address is IPv6). Set empty to disable. This parameter is ignored if a config file is specified by --config.

--healthz-port=10256 The port to bind the health check server. Use 0 to disable.

--hostname-override="" If non-empty, will be used as the name of the Node that kube-proxy is running on. If unset, the node name is assumed to be the same as the node's hostname.

--housekeeping_interval=10s Interval between container housekeepings

--init-only=false If true, perform any initialization steps that must be done with full root privileges, and then exit. After doing this, you can run kube-proxy again with only the CAP_NET_ADMIN capability.

--iptables-localhost-nodeports=true If false, kube-proxy will disable the legacy behavior of allowing NodePort services to be accessed via localhost. (Applies only to iptables mode and IPv4; localhost NodePorts are never allowed with other proxy modes or with IPv6.)

--iptables-masquerade-bit=14 If using the iptables or ipvs proxy mode, the bit of the fwmark space to mark packets requiring SNAT with.  Must be within the range [0, 31].

--iptables-min-sync-period=1s The minimum period between iptables rule resyncs (e.g. '5s', '1m', '2h22m'). A value of 0 means every Service or EndpointSlice change will result in an immediate iptables resync.

--iptables-sync-period=30s An interval (e.g. '5s', '1m', '2h22m') indicating how frequently various re-synchronizing and cleanup operations are performed. Must be greater than 0.

--ipvs-exclude-cidrs=[] A comma-separated list of CIDRs which the ipvs proxier should not touch when cleaning up IPVS rules.

--ipvs-min-sync-period=0s The minimum period between IPVS rule resyncs (e.g. '5s', '1m', '2h22m'). A value of 0 means every Service or EndpointSlice change will result in an immediate IPVS resync.

--ipvs-scheduler="" The ipvs scheduler type when proxy mode is ipvs

--ipvs-strict-arp=false Enable strict ARP by setting arp_ignore to 1 and arp_announce to 2

--ipvs-sync-period=30s An interval (e.g. '5s', '1m', '2h22m') indicating how frequently various re-synchronizing and cleanup operations are performed. Must be greater than 0.

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

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

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

--kube-api-burst=10 Burst to use while talking with kubernetes apiserver

--kube-api-content-type="application/vnd.kubernetes.protobuf" Content type of requests sent to apiserver.

--kube-api-qps=5 QPS to use while talking with kubernetes apiserver

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

--log-flush-frequency=5s Maximum number of seconds between log flushes

--log_cadvisor_usage=false Whether to log the usage of the cAdvisor container

--logging-format="text" Sets the log format. Permitted formats: "text".

--machine_id_file="/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=false If using the iptables or ipvs proxy mode, SNAT all traffic sent via Service cluster IPs. This may be required with some CNI plugins.

--master="" The address of the Kubernetes API server (overrides any value in kubeconfig)

--max_housekeeping_interval=1m0s Largest interval to allow between container housekeepings

--metrics-bind-address=127.0.0.1:10249 The IP address and port for the metrics server to serve on, defaulting to "127.0.0.1:10249" (if --bind-address is unset or IPv4), or "[::1]:10249" (if --bind-address is IPv6). (Set to "0.0.0.0:10249" / "[::]:10249" to bind on all interfaces.) Set empty to disable. This parameter is ignored if a config file is specified by --config.

--metrics-port=10249 The port to bind the metrics server. Use 0 to disable.

--nodeport-addresses=[] A list of CIDR ranges that contain valid node IPs. If set, connections to NodePort services will only be accepted on node IPs in one of the indicated ranges. If unset, NodePort connections will be accepted on all local IPs. This parameter is ignored if a config file is specified by --config.

--oom-score-adj=-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="" A bridge interface name. When --detect-local-mode is set to BridgeInterface, kube-proxy will consider traffic to be local if it originates from this bridge.

--pod-interface-name-prefix="" An interface name prefix. When --detect-local-mode is set to InterfaceNamePrefix, kube-proxy will consider traffic to be local if it originates from any interface whose name begins with this prefix.

--profiling=false 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= Which proxy mode to use: on Linux this can be 'iptables' (default) or 'ipvs'. On Windows the only supported value is 'kernelspace'.This parameter is ignored if a config file is specified by --config.

--proxy-port-range= This was previously used to configure the userspace proxy, but is now unused.

--referenced_reset_interval=0 Reset interval for referenced bytes (container_referenced_bytes metric), number of measurement cycles after which referenced bytes are cleared, if set to 0 referenced bytes are never cleared (default: 0)

--show-hidden-metrics-for-version="" 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 ., 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.

--storage_driver_buffer_duration=1m0s Writes in the storage driver will be buffered for this duration, and committed to the non memory backends as a single transaction

--storage_driver_db="cadvisor" database name

--storage_driver_host="localhost:8086" database host:port

--storage_driver_password="root" database password

--storage_driver_secure=false use secure connection with database

--storage_driver_table="stats" table name

--storage_driver_user="root" database username

--update_machine_info_interval=5m0s Interval between machine info updates.

-v, --v=0 number for the log level verbosity

--version=false --version, --version=raw prints version information and quits; --version=vX.Y.Z... sets the reported version

--vmodule= comma-separated list of pattern=N settings for file-filtered logging (only works for text log format)

--write-config-to="" If set, write the default configuration values to this file and exit.

History

January 2015, Originally compiled by Eric Paris (eparis at redhat dot com) based on the kubernetes source material, but hopefully they have been automatically generated since!

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