kube-apiserver
Synopsis
The Kubernetes API server validates and configures data for the api objects which include pods, services, replicationcontrollers, and others. The API Server services REST operations and provides the frontend to the cluster’s shared state through which all other components interact.
kube-apiserver
Options
--admission-control stringSlice Ordered list of plug-ins to do admission control of resources into cluster. Comma-delimited list of: NamespaceLifecycle. (default [AlwaysAdmit])
--admission-control-config-file string File with admission control configuration.
--advertise-address ip The IP address on which to advertise the apiserver to members of the cluster. This address must be reachable by the rest of the cluster. If blank, the --bind-address will be used. If --bind-address is unspecified, the host's default interface will be used.
--allow-privileged If true, allow privileged containers.
--anonymous-auth Enables anonymous requests to the secure port of the API server. Requests that are not rejected by another authentication method are treated as anonymous requests. Anonymous requests have a username of system:anonymous, and a group name of system:unauthenticated. (default true)
--apiserver-count int The number of apiservers running in the cluster, must be a positive number. (default 1)
--audit-log-maxage int The maximum number of days to retain old audit log files based on the timestamp encoded in their filename.
--audit-log-maxbackup int The maximum number of old audit log files to retain.
--audit-log-maxsize int The maximum size in megabytes of the audit log file before it gets rotated.
--audit-log-path string If set, all requests coming to the apiserver will be logged to this file. '-' means standard out.
--audit-policy-file string Path to the file that defines the audit policy configuration. Requires the 'AdvancedAuditing' feature gate. With AdvancedAuditing, a profile is required to enable auditing.
--audit-webhook-config-file string Path to a kubeconfig formatted file that defines the audit webhook configuration. Requires the 'AdvancedAuditing' feature gate.
--audit-webhook-mode string Strategy for sending audit events. Blocking indicates sending events should block server responses. Batch causes the webhook to buffer and send events asynchronously. Known modes are batch,blocking. (default "batch")
--authentication-token-webhook-cache-ttl duration The duration to cache responses from the webhook token authenticator. (default 2m0s)
--authentication-token-webhook-config-file string File with webhook configuration for token authentication in kubeconfig format. The API server will query the remote service to determine authentication for bearer tokens.
--authorization-mode string Ordered list of plug-ins to do authorization on secure port. Comma-delimited list of: AlwaysAllow,AlwaysDeny,ABAC,Webhook,RBAC,Node. (default "AlwaysAllow")
--authorization-policy-file string File with authorization policy in csv format, used with --authorization-mode=ABAC, on the secure port.
--authorization-webhook-cache-authorized-ttl duration The duration to cache 'authorized' responses from the webhook authorizer. (default 5m0s)
--authorization-webhook-cache-unauthorized-ttl duration The duration to cache 'unauthorized' responses from the webhook authorizer. (default 30s)
--authorization-webhook-config-file string File with webhook configuration in kubeconfig format, used with --authorization-mode=Webhook. The API server will query the remote service to determine access on the API server's secure port.
--azure-container-registry-config string Path to the file container Azure container registry configuration information.
--basic-auth-file string If set, the file that will be used to admit requests to the secure port of the API server via http basic authentication.
--bind-address ip The IP address on which to listen for the --secure-port port. The associated interface(s) must be reachable by the rest of the cluster, and by CLI/web clients. If blank, all interfaces will be used (0.0.0.0). (default 0.0.0.0)
--cert-dir string The directory where the TLS certs are located. If --tls-cert-file and --tls-private-key-file are provided, this flag will be ignored. (default "/var/run/kubernetes")
--client-ca-file string If set, any request presenting a client certificate signed by one of the authorities in the client-ca-file is authenticated with an identity corresponding to the CommonName of the client certificate.
--cloud-config string The path to the cloud provider configuration file. Empty string for no configuration file.
--cloud-provider string The provider for cloud services. Empty string for no provider.
--contention-profiling Enable lock contention profiling, if profiling is enabled
--cors-allowed-origins stringSlice List of allowed origins for CORS, comma separated. An allowed origin can be a regular expression to support subdomain matching. If this list is empty CORS will not be enabled.
--delete-collection-workers int Number of workers spawned for DeleteCollection call. These are used to speed up namespace cleanup. (default 1)
--deserialization-cache-size int Number of deserialized json objects to cache in memory.
--enable-aggregator-routing Turns on aggregator routing requests to endoints IP rather than cluster IP.
--enable-garbage-collector Enables the generic garbage collector. MUST be synced with the corresponding flag of the kube-controller-manager. (default true)
--enable-logs-handler If true, install a /logs handler for the apiserver logs. (default true)
--enable-swagger-ui Enables swagger ui on the apiserver at /swagger-ui
--etcd-cafile string SSL Certificate Authority file used to secure etcd communication.
--etcd-certfile string SSL certification file used to secure etcd communication.
--etcd-keyfile string SSL key file used to secure etcd communication.
--etcd-prefix string The prefix to prepend to all resource paths in etcd. (default "/registry")
--etcd-quorum-read If true, enable quorum read.
--etcd-servers stringSlice List of etcd servers to connect with (scheme://ip:port), comma separated.
--etcd-servers-overrides stringSlice Per-resource etcd servers overrides, comma separated. The individual override format: group/resource#servers, where servers are http://ip:port, semicolon separated.
--event-ttl duration Amount of time to retain events. (default 1h0m0s)
--experimental-bootstrap-token-auth Enable to allow secrets of type 'bootstrap.kubernetes.io/token' in the 'kube-system' namespace to be used for TLS bootstrapping authentication.
--experimental-encryption-provider-config string The file containing configuration for encryption providers to be used for storing secrets in etcd
--experimental-keystone-ca-file string If set, the Keystone server's certificate will be verified by one of the authorities in the experimental-keystone-ca-file, otherwise the host's root CA set will be used.
--experimental-keystone-url string If passed, activates the keystone authentication plugin.
--external-hostname string The hostname to use when generating externalized URLs for this master (e.g. Swagger API Docs).
--feature-gates mapStringBool A set of key=value pairs that describe feature gates for alpha/experimental features. Options are:
Accelerators=true|false (ALPHA - default=false)
AdvancedAuditing=true|false (ALPHA - default=false)
AffinityInAnnotations=true|false (ALPHA - default=false)
AllAlpha=true|false (ALPHA - default=false)
AllowExtTrafficLocalEndpoints=true|false (default=true)
AppArmor=true|false (BETA - default=true)
DynamicKubeletConfig=true|false (ALPHA - default=false)
DynamicVolumeProvisioning=true|false (ALPHA - default=true)
ExperimentalCriticalPodAnnotation=true|false (ALPHA - default=false)
ExperimentalHostUserNamespaceDefaulting=true|false (BETA - default=false)
LocalStorageCapacityIsolation=true|false (ALPHA - default=false)
PersistentLocalVolumes=true|false (ALPHA - default=false)
RotateKubeletClientCertificate=true|false (ALPHA - default=false)
RotateKubeletServerCertificate=true|false (ALPHA - default=false)
StreamingProxyRedirects=true|false (BETA - default=true)
TaintBasedEvictions=true|false (ALPHA - default=false)
--google-json-key string The Google Cloud Platform Service Account JSON Key to use for authentication.
--insecure-allow-any-token username/group1,group2 If set, your server will be INSECURE. Any token will be allowed and user information will be parsed from the token as username/group1,group2
--insecure-bind-address ip The IP address on which to serve the --insecure-port (set to 0.0.0.0 for all interfaces). (default 127.0.0.1)
--insecure-port int The port on which to serve unsecured, unauthenticated access. It is assumed that firewall rules are set up such that this port is not reachable from outside of the cluster and that port 443 on the cluster's public address is proxied to this port. This is performed by nginx in the default setup. (default 8080)
--kubelet-certificate-authority string Path to a cert file for the certificate authority.
--kubelet-client-certificate string Path to a client cert file for TLS.
--kubelet-client-key string Path to a client key file for TLS.
--kubelet-https Use https for kubelet connections. (default true)
--kubelet-preferred-address-types stringSlice List of the preferred NodeAddressTypes to use for kubelet connections. (default [Hostname,InternalDNS,InternalIP,ExternalDNS,ExternalIP])
--kubelet-read-only-port uint DEPRECATED: kubelet port. (default 10255)
--kubelet-timeout duration Timeout for kubelet operations. (default 5s)
--kubernetes-service-node-port int If non-zero, the Kubernetes master service (which apiserver creates/maintains) will be of type NodePort, using this as the value of the port. If zero, the Kubernetes master service will be of type ClusterIP.
--master-service-namespace string DEPRECATED: the namespace from which the kubernetes master services should be injected into pods. (default "default")
--max-connection-bytes-per-sec int If non-zero, throttle each user connection to this number of bytes/sec. Currently only applies to long-running requests.
--max-mutating-requests-inflight int The maximum number of mutating requests in flight at a given time. When the server exceeds this, it rejects requests. Zero for no limit. (default 200)
--max-requests-inflight int The maximum number of non-mutating requests in flight at a given time. When the server exceeds this, it rejects requests. Zero for no limit. (default 400)
--min-request-timeout int An optional field indicating the minimum number of seconds a handler must keep a request open before timing it out. Currently only honored by the watch request handler, which picks a randomized value above this number as the connection timeout, to spread out load. (default 1800)
--oidc-ca-file string If set, the OpenID server's certificate will be verified by one of the authorities in the oidc-ca-file, otherwise the host's root CA set will be used.
--oidc-client-id string The client ID for the OpenID Connect client, must be set if oidc-issuer-url is set.
--oidc-groups-claim string If provided, the name of a custom OpenID Connect claim for specifying user groups. The claim value is expected to be a string or array of strings. This flag is experimental, please see the authentication documentation for further details.
--oidc-issuer-url string The URL of the OpenID issuer, only HTTPS scheme will be accepted. If set, it will be used to verify the OIDC JSON Web Token (JWT).
--oidc-username-claim string The OpenID claim to use as the user name. Note that claims other than the default ('sub') is not guaranteed to be unique and immutable. This flag is experimental, please see the authentication documentation for further details. (default "sub")
--profiling Enable profiling via web interface host:port/debug/pprof/ (default true)
--proxy-client-cert-file string Client certificate used to prove the identity of the aggregator or kube-apiserver when it must call out during a request. This includes proxying requests to a user api-server and calling out to webhook admission plugins. It is expected that this cert includes a signature from the CA in the --requestheader-client-ca-file flag. That CA is published in the 'extension-apiserver-authentication' configmap in the kube-system namespace. Components receiving calls from kube-aggregator should use that CA to perform their half of the mutual TLS verification.
--proxy-client-key-file string Private key for the client certificate used to prove the identity of the aggregator or kube-apiserver when it must call out during a request. This includes proxying requests to a user api-server and calling out to webhook admission plugins.
--repair-malformed-updates If true, server will do its best to fix the update request to pass the validation, e.g., setting empty UID in update request to its existing value. This flag can be turned off after we fix all the clients that send malformed updates. (default true)
--requestheader-allowed-names stringSlice List of client certificate common names to allow to provide usernames in headers specified by --requestheader-username-headers. If empty, any client certificate validated by the authorities in --requestheader-client-ca-file is allowed.
--requestheader-client-ca-file string Root certificate bundle to use to verify client certificates on incoming requests before trusting usernames in headers specified by --requestheader-username-headers
--requestheader-extra-headers-prefix stringSlice List of request header prefixes to inspect. X-Remote-Extra- is suggested.
--requestheader-group-headers stringSlice List of request headers to inspect for groups. X-Remote-Group is suggested.
--requestheader-username-headers stringSlice List of request headers to inspect for usernames. X-Remote-User is common.
--runtime-config mapStringString A set of key=value pairs that describe runtime configuration that may be passed to apiserver. apis/<groupVersion> key can be used to turn on/off specific api versions. apis/<groupVersion>/<resource> can be used to turn on/off specific resources. api/all and api/legacy are special keys to control all and legacy api versions respectively.
--secure-port int The port on which to serve HTTPS with authentication and authorization. If 0, don't serve HTTPS at all. (default 6443)
--service-account-key-file stringArray File containing PEM-encoded x509 RSA or ECDSA private or public keys, used to verify ServiceAccount tokens. If unspecified, --tls-private-key-file is used. The specified file can contain multiple keys, and the flag can be specified multiple times with different files.
--service-account-lookup If true, validate ServiceAccount tokens exist in etcd as part of authentication. (default true)
--service-cluster-ip-range ipNet A CIDR notation IP range from which to assign service cluster IPs. This must not overlap with any IP ranges assigned to nodes for pods.
--service-node-port-range portRange A port range to reserve for services with NodePort visibility. Example: '30000-32767'. Inclusive at both ends of the range. (default 30000-32767)
--ssh-keyfile string If non-empty, use secure SSH proxy to the nodes, using this user keyfile
--ssh-user string If non-empty, use secure SSH proxy to the nodes, using this user name
--storage-backend string The storage backend for persistence. Options: 'etcd3' (default), 'etcd2'.
--storage-media-type string The media type to use to store objects in storage. Some resources or storage backends may only support a specific media type and will ignore this setting. (default "application/vnd.kubernetes.protobuf")
--storage-versions string The per-group version to store resources in. Specified in the format "group1/version1,group2/version2,...". In the case where objects are moved from one group to the other, you may specify the format "group1=group2/v1beta1,group3/v1beta1,...". You only need to pass the groups you wish to change from the defaults. It defaults to a list of preferred versions of all registered groups, which is derived from the KUBE_API_VERSIONS environment variable. (default "admission.k8s.io/v1alpha1,admissionregistration.k8s.io/v1alpha1,apps/v1beta1,authentication.k8s.io/v1,authorization.k8s.io/v1,autoscaling/v1,batch/v1,certificates.k8s.io/v1beta1,componentconfig/v1alpha1,extensions/v1beta1,federation/v1beta1,imagepolicy.k8s.io/v1alpha1,networking.k8s.io/v1,policy/v1beta1,rbac.authorization.k8s.io/v1beta1,settings.k8s.io/v1alpha1,storage.k8s.io/v1,v1")
--target-ram-mb int Memory limit for apiserver in MB (used to configure sizes of caches, etc.)
--tls-ca-file string If set, this certificate authority will used for secure access from Admission Controllers. This must be a valid PEM-encoded CA bundle. Alternatively, the certificate authority can be appended to the certificate provided by --tls-cert-file.
--tls-cert-file string File containing the default x509 Certificate for HTTPS. (CA cert, if any, concatenated after server cert). If HTTPS serving is enabled, and --tls-cert-file and --tls-private-key-file are not provided, a self-signed certificate and key are generated for the public address and saved to /var/run/kubernetes.
--tls-private-key-file string File containing the default x509 private key matching --tls-cert-file.
--tls-sni-cert-key namedCertKey A pair of x509 certificate and private key file paths, optionally suffixed with a list of domain patterns which are fully qualified domain names, possibly with prefixed wildcard segments. If no domain patterns are provided, the names of the certificate are extracted. Non-wildcard matches trump over wildcard matches, explicit domain patterns trump over extracted names. For multiple key/certificate pairs, use the --tls-sni-cert-key multiple times. Examples: "example.crt,example.key" or "foo.crt,foo.key:*.foo.com,foo.com". (default [])
--token-auth-file string If set, the file that will be used to secure the secure port of the API server via token authentication.
--version version[=true] Print version information and quit
--watch-cache Enable watch caching in the apiserver (default true)
--watch-cache-sizes stringSlice List of watch cache sizes for every resource (pods, nodes, etc.), comma separated. The individual override format: resource#size, where size is a number. It takes effect when watch-cache is enabled.