Golang admission.GetPlugins函数代码示例

func TestKubeAdmissionControllerUsage(t *testing.T) {
	registeredKubePlugins := sets.NewString(admission.GetPlugins()...)

	usedAdmissionPlugins := sets.NewString(origin.KubeAdmissionPlugins...)

	if missingPlugins := usedAdmissionPlugins.Difference(registeredKubePlugins); len(missingPlugins) != 0 {
		t.Errorf("%v not found", missingPlugins.List())
	}

	if notUsed := registeredKubePlugins.Difference(usedAdmissionPlugins); len(notUsed) != 0 {
		for pluginName := range notUsed {
			if !admissionPluginsNotUsedByKube.Has(pluginName) {
				t.Errorf("%v not used", pluginName)
			}
		}
	}
}

// AddFlags adds flags for a specific APIServer to the specified FlagSet
func (s *APIServer) AddFlags(fs *pflag.FlagSet) {
	// Note: the weird ""+ in below lines seems to be the only way to get gofmt to
	// arrange these text blocks sensibly. Grrr.
	fs.IntVar(&s.InsecurePort, "insecure-port", s.InsecurePort, ""+
		"The port on which to serve unsecured, unauthenticated access. Default 8080. 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.")
	fs.IntVar(&s.InsecurePort, "port", s.InsecurePort, "DEPRECATED: see --insecure-port instead")
	fs.MarkDeprecated("port", "see --insecure-port instead")
	fs.IPVar(&s.InsecureBindAddress, "insecure-bind-address", s.InsecureBindAddress, ""+
		"The IP address on which to serve the --insecure-port (set to 0.0.0.0 for all interfaces). "+
		"Defaults to localhost.")
	fs.IPVar(&s.InsecureBindAddress, "address", s.InsecureBindAddress, "DEPRECATED: see --insecure-bind-address instead")
	fs.MarkDeprecated("address", "see --insecure-bind-address instread")
	fs.IPVar(&s.BindAddress, "bind-address", s.BindAddress, ""+
		"The IP address on which to serve the --read-only-port and --secure-port ports. 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).")
	fs.IPVar(&s.AdvertiseAddress, "advertise-address", s.AdvertiseAddress, ""+
		"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.")
	fs.IPVar(&s.BindAddress, "public-address-override", s.BindAddress, "DEPRECATED: see --bind-address instead")
	fs.MarkDeprecated("public-address-override", "see --bind-address instead")
	fs.IntVar(&s.SecurePort, "secure-port", s.SecurePort, ""+
		"The port on which to serve HTTPS with authentication and authorization. If 0, "+
		"don't serve HTTPS at all.")
	fs.Float32Var(&s.APIRate, "api-rate", s.APIRate, "API rate limit as QPS for the read only port")
	fs.IntVar(&s.APIBurst, "api-burst", s.APIBurst, "API burst amount for the read only port")
	fs.StringVar(&s.TLSCertFile, "tls-cert-file", s.TLSCertFile, ""+
		"File containing 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.")
	fs.StringVar(&s.TLSPrivateKeyFile, "tls-private-key-file", s.TLSPrivateKeyFile, "File containing x509 private key matching --tls-cert-file.")
	fs.StringVar(&s.CertDirectory, "cert-dir", s.CertDirectory, "The directory where the TLS certs are located (by default /var/run/kubernetes). "+
		"If --tls-cert-file and --tls-private-key-file are provided, this flag will be ignored.")
	fs.StringVar(&s.APIPrefix, "api-prefix", s.APIPrefix, "The prefix for API requests on the server. Default '/api'.")
	fs.StringVar(&s.ExpAPIPrefix, "experimental-prefix", s.ExpAPIPrefix, "The prefix for experimental API requests on the server. Default '/experimental'.")
	fs.StringVar(&s.StorageVersion, "storage-version", s.StorageVersion, "The version to store resources with. Defaults to server preferred")
	fs.StringVar(&s.CloudProvider, "cloud-provider", s.CloudProvider, "The provider for cloud services.  Empty string for no provider.")
	fs.StringVar(&s.CloudConfigFile, "cloud-config", s.CloudConfigFile, "The path to the cloud provider configuration file.  Empty string for no configuration file.")
	fs.DurationVar(&s.EventTTL, "event-ttl", s.EventTTL, "Amount of time to retain events. Default 1 hour.")
	fs.StringVar(&s.BasicAuthFile, "basic-auth-file", s.BasicAuthFile, "If set, the file that will be used to admit requests to the secure port of the API server via http basic authentication.")
	fs.StringVar(&s.ClientCAFile, "client-ca-file", s.ClientCAFile, "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.")
	fs.StringVar(&s.TokenAuthFile, "token-auth-file", s.TokenAuthFile, "If set, the file that will be used to secure the secure port of the API server via token authentication.")
	fs.StringVar(&s.ServiceAccountKeyFile, "service-account-key-file", s.ServiceAccountKeyFile, "File containing PEM-encoded x509 RSA private or public key, used to verify ServiceAccount tokens. If unspecified, --tls-private-key-file is used.")
	fs.BoolVar(&s.ServiceAccountLookup, "service-account-lookup", s.ServiceAccountLookup, "If true, validate ServiceAccount tokens exist in etcd as part of authentication.")
	fs.StringVar(&s.KeystoneURL, "experimental-keystone-url", s.KeystoneURL, "If passed, activates the keystone authentication plugin")
	fs.StringVar(&s.AuthorizationMode, "authorization-mode", s.AuthorizationMode, "Selects how to do authorization on the secure port.  One of: "+strings.Join(apiserver.AuthorizationModeChoices, ","))
	fs.StringVar(&s.AuthorizationPolicyFile, "authorization-policy-file", s.AuthorizationPolicyFile, "File with authorization policy in csv format, used with --authorization-mode=ABAC, on the secure port.")
	fs.StringVar(&s.AdmissionControl, "admission-control", s.AdmissionControl, "Ordered list of plug-ins to do admission control of resources into cluster. Comma-delimited list of: "+strings.Join(admission.GetPlugins(), ", "))
	fs.StringVar(&s.AdmissionControlConfigFile, "admission-control-config-file", s.AdmissionControlConfigFile, "File with admission control configuration.")
	fs.StringSliceVar(&s.EtcdServerList, "etcd-servers", s.EtcdServerList, "List of etcd servers to watch (http://ip:port), comma separated. Mutually exclusive with -etcd-config")
	fs.StringVar(&s.EtcdConfigFile, "etcd-config", s.EtcdConfigFile, "The config file for the etcd client. Mutually exclusive with -etcd-servers.")
	fs.StringVar(&s.EtcdPathPrefix, "etcd-prefix", s.EtcdPathPrefix, "The prefix for all resource paths in etcd.")
	fs.StringSliceVar(&s.CorsAllowedOriginList, "cors-allowed-origins", s.CorsAllowedOriginList, "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.")
	fs.BoolVar(&s.AllowPrivileged, "allow-privileged", s.AllowPrivileged, "If true, allow privileged containers.")
	fs.IPNetVar(&s.ServiceClusterIPRange, "service-cluster-ip-range", s.ServiceClusterIPRange, "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.")
	fs.IPNetVar(&s.ServiceClusterIPRange, "portal-net", s.ServiceClusterIPRange, "Deprecated: see --service-cluster-ip-range instead.")
	fs.MarkDeprecated("portal-net", "see --service-cluster-ip-range instead.")
	fs.Var(&s.ServiceNodePortRange, "service-node-port-range", "A port range to reserve for services with NodePort visibility.  Example: '30000-32767'.  Inclusive at both ends of the range.")
	fs.Var(&s.ServiceNodePortRange, "service-node-ports", "Deprecated: see --service-node-port-range instead.")
	fs.MarkDeprecated("service-node-ports", "see --service-node-port-range instead.")
	fs.StringVar(&s.MasterServiceNamespace, "master-service-namespace", s.MasterServiceNamespace, "The namespace from which the kubernetes master services should be injected into pods")
	fs.Var(&s.RuntimeConfig, "runtime-config", "A set of key=value pairs that describe runtime configuration that may be passed to the apiserver. api/<version> key can be used to turn on/off specific api versions. api/all and api/legacy are special keys to control all and legacy api versions respectively.")
	fs.StringVar(&s.ClusterName, "cluster-name", s.ClusterName, "The instance prefix for the cluster")
	fs.BoolVar(&s.EnableProfiling, "profiling", true, "Enable profiling via web interface host:port/debug/pprof/")
	fs.StringVar(&s.ExternalHost, "external-hostname", "", "The hostname to use when generating externalized URLs for this master (e.g. Swagger API Docs.)")
	fs.IntVar(&s.MaxRequestsInFlight, "max-requests-inflight", 400, "The maximum number of requests in flight at a given time.  When the server exceeds this, it rejects requests.  Zero for no limit.")
	fs.IntVar(&s.MinRequestTimeout, "min-request-timeout", 1800, "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.")
	fs.StringVar(&s.LongRunningRequestRE, "long-running-request-regexp", defaultLongRunningRequestRE, "A regular expression matching long running requests which should be excluded from maximum inflight request handling.")
	fs.StringVar(&s.SSHUser, "ssh-user", "", "If non-empty, use secure SSH proxy to the nodes, using this user name")
	fs.StringVar(&s.SSHKeyfile, "ssh-keyfile", "", "If non-empty, use secure SSH proxy to the nodes, using this user keyfile")
	fs.Int64Var(&s.MaxConnectionBytesPerSec, "max-connection-bytes-per-sec", 0, "If non-zero, throttle each user connection to this number of bytes/sec.  Currently only applies to long-running requests")
	// Kubelet related flags:
	fs.BoolVar(&s.KubeletConfig.EnableHttps, "kubelet-https", s.KubeletConfig.EnableHttps, "Use https for kubelet connections")
	fs.UintVar(&s.KubeletConfig.Port, "kubelet-port", s.KubeletConfig.Port, "Kubelet port")
	fs.DurationVar(&s.KubeletConfig.HTTPTimeout, "kubelet-timeout", s.KubeletConfig.HTTPTimeout, "Timeout for kubelet operations")
	fs.StringVar(&s.KubeletConfig.CertFile, "kubelet-client-certificate", s.KubeletConfig.CertFile, "Path to a client key file for TLS.")
	fs.StringVar(&s.KubeletConfig.KeyFile, "kubelet-client-key", s.KubeletConfig.KeyFile, "Path to a client key file for TLS.")
	fs.StringVar(&s.KubeletConfig.CAFile, "kubelet-certificate-authority", s.KubeletConfig.CAFile, "Path to a cert. file for the certificate authority.")
}

// AddFlags adds flags for a specific APIServer to the specified FlagSet
func (s *APIServer) AddFlags(fs *pflag.FlagSet) {
	// Note: the weird ""+ in below lines seems to be the only way to get gofmt to
	// arrange these text blocks sensibly. Grrr.
	fs.IntVar(&s.InsecurePort, "insecure-port", s.InsecurePort, ""+
		"The port on which to serve unsecured, unauthenticated access. Default 8080. 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.")
	fs.IntVar(&s.InsecurePort, "port", s.InsecurePort, "DEPRECATED: see --insecure-port instead")
	fs.MarkDeprecated("port", "see --insecure-port instead")
	fs.IPVar(&s.InsecureBindAddress, "insecure-bind-address", s.InsecureBindAddress, ""+
		"The IP address on which to serve the --insecure-port (set to 0.0.0.0 for all interfaces). "+
		"Defaults to localhost.")
	fs.IPVar(&s.InsecureBindAddress, "address", s.InsecureBindAddress, "DEPRECATED: see --insecure-bind-address instead")
	fs.MarkDeprecated("address", "see --insecure-bind-address instead")
	fs.IPVar(&s.BindAddress, "bind-address", s.BindAddress, ""+
		"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).")
	fs.IPVar(&s.AdvertiseAddress, "advertise-address", s.AdvertiseAddress, ""+
		"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.")
	fs.IPVar(&s.BindAddress, "public-address-override", s.BindAddress, "DEPRECATED: see --bind-address instead")
	fs.MarkDeprecated("public-address-override", "see --bind-address instead")
	fs.IntVar(&s.SecurePort, "secure-port", s.SecurePort, ""+
		"The port on which to serve HTTPS with authentication and authorization. If 0, "+
		"don't serve HTTPS at all.")
	fs.StringVar(&s.TLSCertFile, "tls-cert-file", s.TLSCertFile, ""+
		"File containing 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.")
	fs.StringVar(&s.TLSPrivateKeyFile, "tls-private-key-file", s.TLSPrivateKeyFile, "File containing x509 private key matching --tls-cert-file.")
	fs.StringVar(&s.CertDirectory, "cert-dir", s.CertDirectory, "The directory where the TLS certs are located (by default /var/run/kubernetes). "+
		"If --tls-cert-file and --tls-private-key-file are provided, this flag will be ignored.")
	fs.StringVar(&s.APIPrefix, "api-prefix", s.APIPrefix, "The prefix for API requests on the server. Default '/api'.")
	fs.MarkDeprecated("api-prefix", "--api-prefix is deprecated and will be removed when the v1 API is retired.")
	fs.StringVar(&s.DeprecatedStorageVersion, "storage-version", s.DeprecatedStorageVersion, "The version to store the legacy v1 resources with. Defaults to server preferred")
	fs.MarkDeprecated("storage-version", "--storage-version is deprecated and will be removed when the v1 API is retired. See --storage-versions instead.")
	fs.StringVar(&s.StorageVersions, "storage-versions", s.StorageVersions, "The versions to store resources with. "+
		"Different groups may be stored in different versions. Specified in the format \"group1/version1,group2/version2...\". "+
		"This flag expects a complete list of storage versions of ALL groups registered in the server. "+
		"It defaults to a list of preferred versions of all registered groups, which is derived from the KUBE_API_VERSIONS environment variable.")
	fs.StringVar(&s.CloudProvider, "cloud-provider", s.CloudProvider, "The provider for cloud services.  Empty string for no provider.")
	fs.StringVar(&s.CloudConfigFile, "cloud-config", s.CloudConfigFile, "The path to the cloud provider configuration file.  Empty string for no configuration file.")
	fs.DurationVar(&s.EventTTL, "event-ttl", s.EventTTL, "Amount of time to retain events. Default 1 hour.")
	fs.StringVar(&s.BasicAuthFile, "basic-auth-file", s.BasicAuthFile, "If set, the file that will be used to admit requests to the secure port of the API server via http basic authentication.")
	fs.StringVar(&s.ClientCAFile, "client-ca-file", s.ClientCAFile, "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.")
	fs.StringVar(&s.TokenAuthFile, "token-auth-file", s.TokenAuthFile, "If set, the file that will be used to secure the secure port of the API server via token authentication.")
	fs.StringVar(&s.OIDCIssuerURL, "oidc-issuer-url", s.OIDCIssuerURL, "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)")
	fs.StringVar(&s.OIDCClientID, "oidc-client-id", s.OIDCClientID, "The client ID for the OpenID Connect client, must be set if oidc-issuer-url is set")
	fs.StringVar(&s.OIDCCAFile, "oidc-ca-file", s.OIDCCAFile, "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")
	fs.StringVar(&s.OIDCUsernameClaim, "oidc-username-claim", "sub", ""+
		"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.")
	fs.StringVar(&s.ServiceAccountKeyFile, "service-account-key-file", s.ServiceAccountKeyFile, "File containing PEM-encoded x509 RSA private or public key, used to verify ServiceAccount tokens. If unspecified, --tls-private-key-file is used.")
	fs.BoolVar(&s.ServiceAccountLookup, "service-account-lookup", s.ServiceAccountLookup, "If true, validate ServiceAccount tokens exist in etcd as part of authentication.")
	fs.StringVar(&s.KeystoneURL, "experimental-keystone-url", s.KeystoneURL, "If passed, activates the keystone authentication plugin")
	fs.StringVar(&s.AuthorizationMode, "authorization-mode", s.AuthorizationMode, "Ordered list of plug-ins to do authorization on secure port. Comma-delimited list of: "+strings.Join(apiserver.AuthorizationModeChoices, ","))
	fs.StringVar(&s.AuthorizationPolicyFile, "authorization-policy-file", s.AuthorizationPolicyFile, "File with authorization policy in csv format, used with --authorization-mode=ABAC, on the secure port.")
	fs.StringVar(&s.AdmissionControl, "admission-control", s.AdmissionControl, "Ordered list of plug-ins to do admission control of resources into cluster. Comma-delimited list of: "+strings.Join(admission.GetPlugins(), ", "))
	fs.StringVar(&s.AdmissionControlConfigFile, "admission-control-config-file", s.AdmissionControlConfigFile, "File with admission control configuration.")
	fs.StringSliceVar(&s.EtcdServerList, "etcd-servers", s.EtcdServerList, "List of etcd servers to watch (http://ip:port), comma separated. Mutually exclusive with -etcd-config")
	fs.StringSliceVar(&s.EtcdServersOverrides, "etcd-servers-overrides", s.EtcdServersOverrides, "Per-resource etcd servers overrides, comma separated. The individual override format: group/resource#servers, where servers are http://ip:port, semicolon separated.")
	fs.StringVar(&s.EtcdPathPrefix, "etcd-prefix", s.EtcdPathPrefix, "The prefix for all resource paths in etcd.")
	fs.BoolVar(&s.EtcdQuorumRead, "etcd-quorum-read", s.EtcdQuorumRead, "If true, enable quorum read")
	fs.StringSliceVar(&s.CorsAllowedOriginList, "cors-allowed-origins", s.CorsAllowedOriginList, "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.")
	fs.BoolVar(&s.AllowPrivileged, "allow-privileged", s.AllowPrivileged, "If true, allow privileged containers.")
	fs.IPNetVar(&s.ServiceClusterIPRange, "service-cluster-ip-range", s.ServiceClusterIPRange, "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.")
	fs.IPNetVar(&s.ServiceClusterIPRange, "portal-net", s.ServiceClusterIPRange, "Deprecated: see --service-cluster-ip-range instead.")
	fs.MarkDeprecated("portal-net", "see --service-cluster-ip-range instead.")
	fs.Var(&s.ServiceNodePortRange, "service-node-port-range", "A port range to reserve for services with NodePort visibility.  Example: '30000-32767'.  Inclusive at both ends of the range.")
	fs.Var(&s.ServiceNodePortRange, "service-node-ports", "Deprecated: see --service-node-port-range instead.")
	fs.MarkDeprecated("service-node-ports", "see --service-node-port-range instead.")
	fs.StringVar(&s.MasterServiceNamespace, "master-service-namespace", s.MasterServiceNamespace, "The namespace from which the kubernetes master services should be injected into pods")
	fs.IntVar(&s.MasterCount, "apiserver-count", s.MasterCount, "The number of apiservers running in the cluster")
	fs.Var(&s.RuntimeConfig, "runtime-config", "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.")
	fs.BoolVar(&s.EnableProfiling, "profiling", true, "Enable profiling via web interface host:port/debug/pprof/")
	// TODO: enable cache in integration tests.
	fs.BoolVar(&s.EnableWatchCache, "watch-cache", true, "Enable watch caching in the apiserver")
	fs.StringVar(&s.ExternalHost, "external-hostname", "", "The hostname to use when generating externalized URLs for this master (e.g. Swagger API Docs.)")
	fs.IntVar(&s.MaxRequestsInFlight, "max-requests-inflight", 400, "The maximum number of requests in flight at a given time.  When the server exceeds this, it rejects requests.  Zero for no limit.")
	fs.IntVar(&s.MinRequestTimeout, "min-request-timeout", 1800, "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.")
	fs.StringVar(&s.LongRunningRequestRE, "long-running-request-regexp", s.LongRunningRequestRE, "A regular expression matching long running requests which should be excluded from maximum inflight request handling.")
	fs.StringVar(&s.SSHUser, "ssh-user", "", "If non-empty, use secure SSH proxy to the nodes, using this user name")
	fs.StringVar(&s.SSHKeyfile, "ssh-keyfile", "", "If non-empty, use secure SSH proxy to the nodes, using this user keyfile")
	fs.Int64Var(&s.MaxConnectionBytesPerSec, "max-connection-bytes-per-sec", 0, "If non-zero, throttle each user connection to this number of bytes/sec.  Currently only applies to long-running requests")
	// Kubelet related flags:
	fs.BoolVar(&s.KubeletConfig.EnableHttps, "kubelet-https", s.KubeletConfig.EnableHttps, "Use https for kubelet connections")
	fs.UintVar(&s.KubeletConfig.Port, "kubelet-port", s.KubeletConfig.Port, "Kubelet port")
	fs.MarkDeprecated("kubelet-port", "kubelet-port is deprecated and will be removed")
	fs.DurationVar(&s.KubeletConfig.HTTPTimeout, "kubelet-timeout", s.KubeletConfig.HTTPTimeout, "Timeout for kubelet operations")
	fs.StringVar(&s.KubeletConfig.CertFile, "kubelet-client-certificate", s.KubeletConfig.CertFile, "Path to a client cert file for TLS.")
	fs.StringVar(&s.KubeletConfig.KeyFile, "kubelet-client-key", s.KubeletConfig.KeyFile, "Path to a client key file for TLS.")
	fs.StringVar(&s.KubeletConfig.CAFile, "kubelet-certificate-authority", s.KubeletConfig.CAFile, "Path to a cert. file for the certificate authority.")
	// See #14282 for details on how to test/try this option out.  TODO remove this comment once this option is tested in CI.
	fs.IntVar(&s.KubernetesServiceNodePort, "kubernetes-service-node-port", 0, "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.")
	// TODO: delete this flag as soon as we identify and fix all clients that send malformed updates, like #14126.
//.........这里部分代码省略.........

// AddFlags adds flags for a specific APIServer to the specified FlagSet
func (s *ServerRunOptions) AddUniversalFlags(fs *pflag.FlagSet) {
	// Note: the weird ""+ in below lines seems to be the only way to get gofmt to
	// arrange these text blocks sensibly. Grrr.

	fs.StringVar(&s.AdmissionControl, "admission-control", s.AdmissionControl, ""+
		"Ordered list of plug-ins to do admission control of resources into cluster. "+
		"Comma-delimited list of: "+strings.Join(admission.GetPlugins(), ", ")+".")

	fs.StringVar(&s.AdmissionControlConfigFile, "admission-control-config-file", s.AdmissionControlConfigFile,
		"File with admission control configuration.")

	fs.IPVar(&s.AdvertiseAddress, "advertise-address", s.AdvertiseAddress, ""+
		"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.")

	fs.StringVar(&s.AuthorizationMode, "authorization-mode", s.AuthorizationMode, ""+
		"Ordered list of plug-ins to do authorization on secure port. Comma-delimited list of: "+
		strings.Join(AuthorizationModeChoices, ",")+".")

	fs.StringVar(&s.AuthorizationPolicyFile, "authorization-policy-file", s.AuthorizationPolicyFile, ""+
		"File with authorization policy in csv format, used with --authorization-mode=ABAC, on the secure port.")

	fs.StringVar(&s.AuthorizationWebhookConfigFile, "authorization-webhook-config-file", s.AuthorizationWebhookConfigFile, ""+
		"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.")

	fs.DurationVar(&s.AuthorizationWebhookCacheAuthorizedTTL, "authorization-webhook-cache-authorized-ttl",
		s.AuthorizationWebhookCacheAuthorizedTTL,
		"The duration to cache 'authorized' responses from the webhook authorizer. Default is 5m.")

	fs.DurationVar(&s.AuthorizationWebhookCacheUnauthorizedTTL,
		"authorization-webhook-cache-unauthorized-ttl", s.AuthorizationWebhookCacheUnauthorizedTTL,
		"The duration to cache 'unauthorized' responses from the webhook authorizer. Default is 30s.")

	fs.StringVar(&s.AuthorizationRBACSuperUser, "authorization-rbac-super-user", s.AuthorizationRBACSuperUser, ""+
		"If specified, a username which avoids RBAC authorization checks and role binding "+
		"privilege escalation checks, to be used with --authorization-mode=RBAC.")

	fs.BoolVar(&s.AnonymousAuth, "anonymous-auth", s.AnonymousAuth, ""+
		"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.")

	fs.StringVar(&s.BasicAuthFile, "basic-auth-file", s.BasicAuthFile, ""+
		"If set, the file that will be used to admit requests to the secure port of the API server "+
		"via http basic authentication.")

	fs.IPVar(&s.BindAddress, "public-address-override", s.BindAddress,
		"DEPRECATED: see --bind-address instead.")
	fs.MarkDeprecated("public-address-override", "see --bind-address instead.")

	fs.IPVar(&s.BindAddress, "bind-address", s.BindAddress, ""+
		"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).")

	fs.StringVar(&s.CertDirectory, "cert-dir", s.CertDirectory, ""+
		"The directory where the TLS certs are located (by default /var/run/kubernetes). "+
		"If --tls-cert-file and --tls-private-key-file are provided, this flag will be ignored.")

	fs.StringVar(&s.ClientCAFile, "client-ca-file", s.ClientCAFile, ""+
		"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.")

	fs.StringVar(&s.CloudProvider, "cloud-provider", s.CloudProvider,
		"The provider for cloud services. Empty string for no provider.")

	fs.StringVar(&s.CloudConfigFile, "cloud-config", s.CloudConfigFile,
		"The path to the cloud provider configuration file. Empty string for no configuration file.")

	fs.StringSliceVar(&s.CorsAllowedOriginList, "cors-allowed-origins", s.CorsAllowedOriginList, ""+
		"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.")

	fs.StringVar(&s.DefaultStorageMediaType, "storage-media-type", s.DefaultStorageMediaType, ""+
		"The media type to use to store objects in storage. Defaults to application/json. "+
		"Some resources may only support a specific media type and will ignore this setting.")

	fs.IntVar(&s.DeleteCollectionWorkers, "delete-collection-workers", s.DeleteCollectionWorkers,
		"Number of workers spawned for DeleteCollection call. These are used to speed up namespace cleanup.")

	fs.StringVar(&s.AuditLogPath, "audit-log-path", s.AuditLogPath,
		"If set, all requests coming to the apiserver will be logged to this file.")
	fs.IntVar(&s.AuditLogMaxAge, "audit-log-maxage", s.AuditLogMaxBackups,
		"The maximum number of days to retain old audit log files based on the timestamp encoded in their filename.")
	fs.IntVar(&s.AuditLogMaxBackups, "audit-log-maxbackup", s.AuditLogMaxBackups,
		"The maximum number of old audit log files to retain.")
	fs.IntVar(&s.AuditLogMaxSize, "audit-log-maxsize", s.AuditLogMaxSize,
		"The maximum size in megabytes of the audit log file before it gets rotated. Defaults to 100MB.")

	fs.BoolVar(&s.EnableGarbageCollection, "enable-garbage-collector", s.EnableGarbageCollection, ""+
		"Enables the generic garbage collector. MUST be synced with the corresponding flag "+
		"of the kube-controller-manager.")

	fs.BoolVar(&s.EnableProfiling, "profiling", s.EnableProfiling,
		"Enable profiling via web interface host:port/debug/pprof/")
//.........这里部分代码省略.........

// AddFlags adds flags for a specific APIServer to the specified FlagSet
func (s *APIServer) AddFlags(fs *pflag.FlagSet) {
	// Add the generic flags.
	s.ServerRunOptions.AddFlags(fs)
	// Note: the weird ""+ in below lines seems to be the only way to get gofmt to
	// arrange these text blocks sensibly. Grrr.
	fs.StringVar(&s.APIPrefix, "api-prefix", s.APIPrefix, "The prefix for API requests on the server. Default '/api'.")
	fs.MarkDeprecated("api-prefix", "--api-prefix is deprecated and will be removed when the v1 API is retired.")
	fs.StringVar(&s.DeprecatedStorageVersion, "storage-version", s.DeprecatedStorageVersion, "The version to store the legacy v1 resources with. Defaults to server preferred")
	fs.MarkDeprecated("storage-version", "--storage-version is deprecated and will be removed when the v1 API is retired. See --storage-versions instead.")
	fs.StringVar(&s.StorageVersions, "storage-versions", s.StorageVersions, "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.")
	fs.StringVar(&s.CloudProvider, "cloud-provider", s.CloudProvider, "The provider for cloud services.  Empty string for no provider.")
	fs.StringVar(&s.CloudConfigFile, "cloud-config", s.CloudConfigFile, "The path to the cloud provider configuration file.  Empty string for no configuration file.")
	fs.DurationVar(&s.EventTTL, "event-ttl", s.EventTTL, "Amount of time to retain events. Default 1 hour.")
	fs.StringVar(&s.BasicAuthFile, "basic-auth-file", s.BasicAuthFile, "If set, the file that will be used to admit requests to the secure port of the API server via http basic authentication.")
	fs.StringVar(&s.TokenAuthFile, "token-auth-file", s.TokenAuthFile, "If set, the file that will be used to secure the secure port of the API server via token authentication.")
	fs.StringVar(&s.OIDCIssuerURL, "oidc-issuer-url", s.OIDCIssuerURL, "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)")
	fs.StringVar(&s.OIDCClientID, "oidc-client-id", s.OIDCClientID, "The client ID for the OpenID Connect client, must be set if oidc-issuer-url is set")
	fs.StringVar(&s.OIDCCAFile, "oidc-ca-file", s.OIDCCAFile, "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")
	fs.StringVar(&s.OIDCUsernameClaim, "oidc-username-claim", "sub", ""+
		"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.")
	fs.StringVar(&s.OIDCGroupsClaim, "oidc-groups-claim", "", "If provided, the name of a custom OpenID Connect claim for specifying user groups. The claim value is expected to be an array of strings. This flag is experimental, please see the authentication documentation for further details.")
	fs.StringVar(&s.ServiceAccountKeyFile, "service-account-key-file", s.ServiceAccountKeyFile, "File containing PEM-encoded x509 RSA private or public key, used to verify ServiceAccount tokens. If unspecified, --tls-private-key-file is used.")
	fs.BoolVar(&s.ServiceAccountLookup, "service-account-lookup", s.ServiceAccountLookup, "If true, validate ServiceAccount tokens exist in etcd as part of authentication.")
	fs.StringVar(&s.KeystoneURL, "experimental-keystone-url", s.KeystoneURL, "If passed, activates the keystone authentication plugin")
	fs.StringVar(&s.AuthorizationMode, "authorization-mode", s.AuthorizationMode, "Ordered list of plug-ins to do authorization on secure port. Comma-delimited list of: "+strings.Join(apiserver.AuthorizationModeChoices, ","))
	fs.StringVar(&s.AuthorizationConfig.PolicyFile, "authorization-policy-file", s.AuthorizationConfig.PolicyFile, "File with authorization policy in csv format, used with --authorization-mode=ABAC, on the secure port.")
	fs.StringVar(&s.AuthorizationConfig.WebhookConfigFile, "authorization-webhook-config-file", s.AuthorizationConfig.WebhookConfigFile, "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.")
	fs.StringVar(&s.AdmissionControl, "admission-control", s.AdmissionControl, "Ordered list of plug-ins to do admission control of resources into cluster. Comma-delimited list of: "+strings.Join(admission.GetPlugins(), ", "))
	fs.StringVar(&s.AdmissionControlConfigFile, "admission-control-config-file", s.AdmissionControlConfigFile, "File with admission control configuration.")
	fs.StringSliceVar(&s.EtcdConfig.ServerList, "etcd-servers", s.EtcdConfig.ServerList, "List of etcd servers to watch (http://ip:port), comma separated.")
	fs.StringSliceVar(&s.EtcdServersOverrides, "etcd-servers-overrides", s.EtcdServersOverrides, "Per-resource etcd servers overrides, comma separated. The individual override format: group/resource#servers, where servers are http://ip:port, semicolon separated.")
	fs.StringVar(&s.EtcdConfig.Prefix, "etcd-prefix", s.EtcdConfig.Prefix, "The prefix for all resource paths in etcd.")
	fs.StringVar(&s.EtcdConfig.KeyFile, "etcd-keyfile", s.EtcdConfig.KeyFile, "SSL key file used to secure etcd communication")
	fs.StringVar(&s.EtcdConfig.CertFile, "etcd-certfile", s.EtcdConfig.CertFile, "SSL certification file used to secure etcd communication")
	fs.StringVar(&s.EtcdConfig.CAFile, "etcd-cafile", s.EtcdConfig.CAFile, "SSL Certificate Authority file used to secure etcd communication")
	fs.BoolVar(&s.EtcdConfig.Quorum, "etcd-quorum-read", s.EtcdConfig.Quorum, "If true, enable quorum read")
	fs.IntVar(&s.EtcdConfig.DeserializationCacheSize, "deserialization-cache-size", s.EtcdConfig.DeserializationCacheSize, "Number of deserialized json objects to cache in memory.")
	fs.BoolVar(&s.AllowPrivileged, "allow-privileged", s.AllowPrivileged, "If true, allow privileged containers.")
	fs.StringVar(&s.MasterServiceNamespace, "master-service-namespace", s.MasterServiceNamespace, "The namespace from which the kubernetes master services should be injected into pods")
	fs.IntVar(&s.DeleteCollectionWorkers, "delete-collection-workers", s.DeleteCollectionWorkers, "Number of workers spawned for DeleteCollection call. These are used to speed up namespace cleanup.")
	fs.StringVar(&s.SSHUser, "ssh-user", s.SSHUser, "If non-empty, use secure SSH proxy to the nodes, using this user name")
	fs.StringVar(&s.SSHKeyfile, "ssh-keyfile", s.SSHKeyfile, "If non-empty, use secure SSH proxy to the nodes, using this user keyfile")
	fs.Int64Var(&s.MaxConnectionBytesPerSec, "max-connection-bytes-per-sec", s.MaxConnectionBytesPerSec, "If non-zero, throttle each user connection to this number of bytes/sec.  Currently only applies to long-running requests")
	// Kubelet related flags:
	fs.BoolVar(&s.KubeletConfig.EnableHttps, "kubelet-https", s.KubeletConfig.EnableHttps, "Use https for kubelet connections")
	fs.UintVar(&s.KubeletConfig.Port, "kubelet-port", s.KubeletConfig.Port, "Kubelet port")
	fs.MarkDeprecated("kubelet-port", "kubelet-port is deprecated and will be removed")
	fs.DurationVar(&s.KubeletConfig.HTTPTimeout, "kubelet-timeout", s.KubeletConfig.HTTPTimeout, "Timeout for kubelet operations")
	fs.StringVar(&s.KubeletConfig.CertFile, "kubelet-client-certificate", s.KubeletConfig.CertFile, "Path to a client cert file for TLS.")
	fs.StringVar(&s.KubeletConfig.KeyFile, "kubelet-client-key", s.KubeletConfig.KeyFile, "Path to a client key file for TLS.")
	fs.StringVar(&s.KubeletConfig.CAFile, "kubelet-certificate-authority", s.KubeletConfig.CAFile, "Path to a cert. file for the certificate authority.")
	// TODO: delete this flag as soon as we identify and fix all clients that send malformed updates, like #14126.
	fs.BoolVar(&validation.RepairMalformedUpdates, "repair-malformed-updates", validation.RepairMalformedUpdates, "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.")
	fs.StringSliceVar(&s.WatchCacheSizes, "watch-cache-sizes", s.WatchCacheSizes, "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.")
}

// AddFlags adds flags for a specific APIServer to the specified FlagSet
func (s *ServerRunOptions) AddFlags(fs *pflag.FlagSet) {
	// Note: the weird ""+ in below lines seems to be the only way to get gofmt to
	// arrange these text blocks sensibly. Grrr.

	fs.StringVar(&s.AdmissionControl, "admission-control", s.AdmissionControl, "Ordered list of plug-ins to do admission control of resources into cluster. Comma-delimited list of: "+strings.Join(admission.GetPlugins(), ", "))
	fs.StringVar(&s.AdmissionControlConfigFile, "admission-control-config-file", s.AdmissionControlConfigFile, "File with admission control configuration.")

	fs.IPVar(&s.AdvertiseAddress, "advertise-address", s.AdvertiseAddress, ""+
		"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.")

	fs.StringVar(&s.AuthorizationMode, "authorization-mode", s.AuthorizationMode, "Ordered list of plug-ins to do authorization on secure port. Comma-delimited list of: "+strings.Join(apiserver.AuthorizationModeChoices, ","))

	fs.StringVar(&s.AuthorizationConfig.PolicyFile, "authorization-policy-file", s.AuthorizationConfig.PolicyFile, "File with authorization policy in csv format, used with --authorization-mode=ABAC, on the secure port.")
	fs.StringVar(&s.AuthorizationConfig.WebhookConfigFile, "authorization-webhook-config-file", s.AuthorizationConfig.WebhookConfigFile, "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.")

	fs.StringVar(&s.BasicAuthFile, "basic-auth-file", s.BasicAuthFile, "If set, the file that will be used to admit requests to the secure port of the API server via http basic authentication.")

	fs.IPVar(&s.BindAddress, "public-address-override", s.BindAddress, "DEPRECATED: see --bind-address instead")
	fs.MarkDeprecated("public-address-override", "see --bind-address instead")
	fs.IPVar(&s.BindAddress, "bind-address", s.BindAddress, ""+
		"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).")

	fs.StringVar(&s.CertDirectory, "cert-dir", s.CertDirectory, "The directory where the TLS certs are located (by default /var/run/kubernetes). "+
		"If --tls-cert-file and --tls-private-key-file are provided, this flag will be ignored.")

	fs.StringVar(&s.ClientCAFile, "client-ca-file", s.ClientCAFile, "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.")

	fs.StringVar(&s.CloudProvider, "cloud-provider", s.CloudProvider, "The provider for cloud services.  Empty string for no provider.")
	fs.StringVar(&s.CloudConfigFile, "cloud-config", s.CloudConfigFile, "The path to the cloud provider configuration file.  Empty string for no configuration file.")

	fs.StringSliceVar(&s.CorsAllowedOriginList, "cors-allowed-origins", s.CorsAllowedOriginList, "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.")

	fs.StringVar(&s.DefaultStorageMediaType, "storage-media-type", s.DefaultStorageMediaType, "The media type to use to store objects in storage. Defaults to application/json. Some resources may only support a specific media type and will ignore this setting.")

	fs.IntVar(&s.DeleteCollectionWorkers, "delete-collection-workers", s.DeleteCollectionWorkers, "Number of workers spawned for DeleteCollection call. These are used to speed up namespace cleanup.")

	fs.BoolVar(&s.EnableProfiling, "profiling", s.EnableProfiling, "Enable profiling via web interface host:port/debug/pprof/")

	fs.BoolVar(&s.EnableSwaggerUI, "enable-swagger-ui", s.EnableSwaggerUI, "Enables swagger ui on the apiserver at /swagger-ui")

	// TODO: enable cache in integration tests.
	fs.BoolVar(&s.EnableWatchCache, "watch-cache", s.EnableWatchCache, "Enable watch caching in the apiserver")

	fs.StringSliceVar(&s.EtcdServersOverrides, "etcd-servers-overrides", s.EtcdServersOverrides, "Per-resource etcd servers overrides, comma separated. The individual override format: group/resource#servers, where servers are http://ip:port, semicolon separated.")

	fs.StringVar(&s.ExternalHost, "external-hostname", s.ExternalHost, "The hostname to use when generating externalized URLs for this master (e.g. Swagger API Docs.)")

	fs.IPVar(&s.InsecureBindAddress, "insecure-bind-address", s.InsecureBindAddress, ""+
		"The IP address on which to serve the --insecure-port (set to 0.0.0.0 for all interfaces). "+
		"Defaults to localhost.")
	fs.IPVar(&s.InsecureBindAddress, "address", s.InsecureBindAddress, "DEPRECATED: see --insecure-bind-address instead")
	fs.MarkDeprecated("address", "see --insecure-bind-address instead")

	fs.IntVar(&s.InsecurePort, "insecure-port", s.InsecurePort, ""+
		"The port on which to serve unsecured, unauthenticated access. Default 8080. 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.")
	fs.IntVar(&s.InsecurePort, "port", s.InsecurePort, "DEPRECATED: see --insecure-port instead")
	fs.MarkDeprecated("port", "see --insecure-port instead")

	fs.StringVar(&s.KeystoneURL, "experimental-keystone-url", s.KeystoneURL, "If passed, activates the keystone authentication plugin")

	// See #14282 for details on how to test/try this option out.  TODO remove this comment once this option is tested in CI.
	fs.IntVar(&s.KubernetesServiceNodePort, "kubernetes-service-node-port", s.KubernetesServiceNodePort, "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.")

	fs.StringVar(&s.LongRunningRequestRE, "long-running-request-regexp", s.LongRunningRequestRE, "A regular expression matching long running requests which should be excluded from maximum inflight request handling.")

	fs.IntVar(&s.MasterCount, "apiserver-count", s.MasterCount, "The number of apiservers running in the cluster")

	fs.StringVar(&s.MasterServiceNamespace, "master-service-namespace", s.MasterServiceNamespace, "The namespace from which the kubernetes master services should be injected into pods")

	fs.IntVar(&s.MaxRequestsInFlight, "max-requests-inflight", s.MaxRequestsInFlight, "The maximum number of requests in flight at a given time.  When the server exceeds this, it rejects requests.  Zero for no limit.")

	fs.IntVar(&s.MinRequestTimeout, "min-request-timeout", s.MinRequestTimeout, "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.")

	fs.StringVar(&s.OIDCIssuerURL, "oidc-issuer-url", s.OIDCIssuerURL, "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)")
	fs.StringVar(&s.OIDCClientID, "oidc-client-id", s.OIDCClientID, "The client ID for the OpenID Connect client, must be set if oidc-issuer-url is set")
	fs.StringVar(&s.OIDCCAFile, "oidc-ca-file", s.OIDCCAFile, "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")
	fs.StringVar(&s.OIDCUsernameClaim, "oidc-username-claim", "sub", ""+
		"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.")
	fs.StringVar(&s.OIDCGroupsClaim, "oidc-groups-claim", "", "If provided, the name of a custom OpenID Connect claim for specifying user groups. The claim value is expected to be an array of strings. This flag is experimental, please see the authentication documentation for further details.")

	fs.Var(&s.RuntimeConfig, "runtime-config", "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.")

	fs.IntVar(&s.SecurePort, "secure-port", s.SecurePort, ""+
		"The port on which to serve HTTPS with authentication and authorization. If 0, "+
		"don't serve HTTPS at all.")

	fs.IPNetVar(&s.ServiceClusterIPRange, "service-cluster-ip-range", s.ServiceClusterIPRange, "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.")
	fs.IPNetVar(&s.ServiceClusterIPRange, "portal-net", s.ServiceClusterIPRange, "Deprecated: see --service-cluster-ip-range instead.")
	fs.MarkDeprecated("portal-net", "see --service-cluster-ip-range instead.")

//.........这里部分代码省略.........

// AddFlags adds flags for a specific APIServer to the specified FlagSet
func (s *APIServer) AddFlags(fs *pflag.FlagSet) {
	// Add the generic flags.
	s.ServerRunOptions.AddFlags(fs)
	// Note: the weird ""+ in below lines seems to be the only way to get gofmt to
	// arrange these text blocks sensibly. Grrr.
	fs.MarkDeprecated("port", "see --insecure-port instead")
	fs.MarkDeprecated("address", "see --insecure-bind-address instead")
	fs.IPVar(&s.AdvertiseAddress, "advertise-address", s.AdvertiseAddress, ""+
		"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.")
	fs.IPVar(&s.BindAddress, "public-address-override", s.BindAddress, "DEPRECATED: see --bind-address instead")
	fs.MarkDeprecated("public-address-override", "see --bind-address instead")
	fs.StringVar(&s.APIPrefix, "api-prefix", s.APIPrefix, "The prefix for API requests on the server. Default '/api'.")
	fs.MarkDeprecated("api-prefix", "--api-prefix is deprecated and will be removed when the v1 API is retired.")
	fs.StringVar(&s.DeprecatedStorageVersion, "storage-version", s.DeprecatedStorageVersion, "The version to store the legacy v1 resources with. Defaults to server preferred")
	fs.MarkDeprecated("storage-version", "--storage-version is deprecated and will be removed when the v1 API is retired. See --storage-versions instead.")
	fs.StringVar(&s.StorageVersions, "storage-versions", s.StorageVersions, "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.")
	fs.StringVar(&s.CloudProvider, "cloud-provider", s.CloudProvider, "The provider for cloud services.  Empty string for no provider.")
	fs.StringVar(&s.CloudConfigFile, "cloud-config", s.CloudConfigFile, "The path to the cloud provider configuration file.  Empty string for no configuration file.")
	fs.DurationVar(&s.EventTTL, "event-ttl", s.EventTTL, "Amount of time to retain events. Default 1 hour.")
	fs.StringVar(&s.BasicAuthFile, "basic-auth-file", s.BasicAuthFile, "If set, the file that will be used to admit requests to the secure port of the API server via http basic authentication.")
	fs.StringVar(&s.TokenAuthFile, "token-auth-file", s.TokenAuthFile, "If set, the file that will be used to secure the secure port of the API server via token authentication.")
	fs.StringVar(&s.OIDCIssuerURL, "oidc-issuer-url", s.OIDCIssuerURL, "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)")
	fs.StringVar(&s.OIDCClientID, "oidc-client-id", s.OIDCClientID, "The client ID for the OpenID Connect client, must be set if oidc-issuer-url is set")
	fs.StringVar(&s.OIDCCAFile, "oidc-ca-file", s.OIDCCAFile, "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")
	fs.StringVar(&s.OIDCUsernameClaim, "oidc-username-claim", "sub", ""+
		"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.")
	fs.StringVar(&s.OIDCGroupsClaim, "oidc-groups-claim", "", "If provided, the name of a custom OpenID Connect claim for specifying user groups. The claim value is expected to be an array of strings. This flag is experimental, please see the authentication documentation for further details.")
	fs.StringVar(&s.ServiceAccountKeyFile, "service-account-key-file", s.ServiceAccountKeyFile, "File containing PEM-encoded x509 RSA private or public key, used to verify ServiceAccount tokens. If unspecified, --tls-private-key-file is used.")
	fs.BoolVar(&s.ServiceAccountLookup, "service-account-lookup", s.ServiceAccountLookup, "If true, validate ServiceAccount tokens exist in etcd as part of authentication.")
	fs.StringVar(&s.KeystoneURL, "experimental-keystone-url", s.KeystoneURL, "If passed, activates the keystone authentication plugin")
	fs.StringVar(&s.AuthorizationMode, "authorization-mode", s.AuthorizationMode, "Ordered list of plug-ins to do authorization on secure port. Comma-delimited list of: "+strings.Join(apiserver.AuthorizationModeChoices, ","))
	fs.StringVar(&s.AuthorizationConfig.PolicyFile, "authorization-policy-file", s.AuthorizationConfig.PolicyFile, "File with authorization policy in csv format, used with --authorization-mode=ABAC, on the secure port.")
	fs.StringVar(&s.AuthorizationConfig.WebhookConfigFile, "authorization-webhook-config-file", s.AuthorizationConfig.WebhookConfigFile, "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.")
	fs.StringVar(&s.AdmissionControl, "admission-control", s.AdmissionControl, "Ordered list of plug-ins to do admission control of resources into cluster. Comma-delimited list of: "+strings.Join(admission.GetPlugins(), ", "))
	fs.StringVar(&s.AdmissionControlConfigFile, "admission-control-config-file", s.AdmissionControlConfigFile, "File with admission control configuration.")
	fs.StringSliceVar(&s.EtcdConfig.ServerList, "etcd-servers", s.EtcdConfig.ServerList, "List of etcd servers to watch (http://ip:port), comma separated.")
	fs.StringSliceVar(&s.EtcdServersOverrides, "etcd-servers-overrides", s.EtcdServersOverrides, "Per-resource etcd servers overrides, comma separated. The individual override format: group/resource#servers, where servers are http://ip:port, semicolon separated.")
	fs.StringVar(&s.EtcdConfig.Prefix, "etcd-prefix", s.EtcdConfig.Prefix, "The prefix for all resource paths in etcd.")
	fs.StringVar(&s.EtcdConfig.KeyFile, "etcd-keyfile", s.EtcdConfig.KeyFile, "SSL key file used to secure etcd communication")
	fs.StringVar(&s.EtcdConfig.CertFile, "etcd-certfile", s.EtcdConfig.CertFile, "SSL certification file used to secure etcd communication")
	fs.StringVar(&s.EtcdConfig.CAFile, "etcd-cafile", s.EtcdConfig.CAFile, "SSL Certificate Authority file used to secure etcd communication")
	fs.BoolVar(&s.EtcdConfig.Quorum, "etcd-quorum-read", s.EtcdConfig.Quorum, "If true, enable quorum read")
	fs.IntVar(&s.EtcdConfig.DeserializationCacheSize, "deserialization-cache-size", s.EtcdConfig.DeserializationCacheSize, "Number of deserialized json objects to cache in memory.")
	fs.StringSliceVar(&s.CorsAllowedOriginList, "cors-allowed-origins", s.CorsAllowedOriginList, "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.")
	fs.BoolVar(&s.AllowPrivileged, "allow-privileged", s.AllowPrivileged, "If true, allow privileged containers.")
	fs.IPNetVar(&s.ServiceClusterIPRange, "service-cluster-ip-range", s.ServiceClusterIPRange, "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.")
	fs.IPNetVar(&s.ServiceClusterIPRange, "portal-net", s.ServiceClusterIPRange, "Deprecated: see --service-cluster-ip-range instead.")
	fs.MarkDeprecated("portal-net", "see --service-cluster-ip-range instead.")
	fs.Var(&s.ServiceNodePortRange, "service-node-port-range", "A port range to reserve for services with NodePort visibility.  Example: '30000-32767'.  Inclusive at both ends of the range.")
	fs.Var(&s.ServiceNodePortRange, "service-node-ports", "Deprecated: see --service-node-port-range instead.")
	fs.MarkDeprecated("service-node-ports", "see --service-node-port-range instead.")
	fs.StringVar(&s.MasterServiceNamespace, "master-service-namespace", s.MasterServiceNamespace, "The namespace from which the kubernetes master services should be injected into pods")
	fs.IntVar(&s.MasterCount, "apiserver-count", s.MasterCount, "The number of apiservers running in the cluster")
	fs.IntVar(&s.DeleteCollectionWorkers, "delete-collection-workers", s.DeleteCollectionWorkers, "Number of workers spawned for DeleteCollection call. These are used to speed up namespace cleanup.")
	fs.Var(&s.RuntimeConfig, "runtime-config", "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.")
	fs.BoolVar(&s.EnableProfiling, "profiling", s.EnableProfiling, "Enable profiling via web interface host:port/debug/pprof/")
	// TODO: enable cache in integration tests.
	fs.BoolVar(&s.EnableWatchCache, "watch-cache", s.EnableWatchCache, "Enable watch caching in the apiserver")
	fs.BoolVar(&s.EnableSwaggerUI, "enable-swagger-ui", s.EnableSwaggerUI, "Enables swagger ui on the apiserver at /swagger-ui")
	fs.StringVar(&s.ExternalHost, "external-hostname", s.ExternalHost, "The hostname to use when generating externalized URLs for this master (e.g. Swagger API Docs.)")
	fs.IntVar(&s.MinRequestTimeout, "min-request-timeout", s.MinRequestTimeout, "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.")
	fs.StringVar(&s.SSHUser, "ssh-user", s.SSHUser, "If non-empty, use secure SSH proxy to the nodes, using this user name")
	fs.StringVar(&s.SSHKeyfile, "ssh-keyfile", s.SSHKeyfile, "If non-empty, use secure SSH proxy to the nodes, using this user keyfile")
	fs.Int64Var(&s.MaxConnectionBytesPerSec, "max-connection-bytes-per-sec", s.MaxConnectionBytesPerSec, "If non-zero, throttle each user connection to this number of bytes/sec.  Currently only applies to long-running requests")
	// Kubelet related flags:
	fs.BoolVar(&s.KubeletConfig.EnableHttps, "kubelet-https", s.KubeletConfig.EnableHttps, "Use https for kubelet connections")
	fs.UintVar(&s.KubeletConfig.Port, "kubelet-port", s.KubeletConfig.Port, "Kubelet port")
	fs.MarkDeprecated("kubelet-port", "kubelet-port is deprecated and will be removed")
	fs.DurationVar(&s.KubeletConfig.HTTPTimeout, "kubelet-timeout", s.KubeletConfig.HTTPTimeout, "Timeout for kubelet operations")
	fs.StringVar(&s.KubeletConfig.CertFile, "kubelet-client-certificate", s.KubeletConfig.CertFile, "Path to a client cert file for TLS.")
	fs.StringVar(&s.KubeletConfig.KeyFile, "kubelet-client-key", s.KubeletConfig.KeyFile, "Path to a client key file for TLS.")
	fs.StringVar(&s.KubeletConfig.CAFile, "kubelet-certificate-authority", s.KubeletConfig.CAFile, "Path to a cert. file for the certificate authority.")
	// See #14282 for details on how to test/try this option out.  TODO remove this comment once this option is tested in CI.
	fs.IntVar(&s.KubernetesServiceNodePort, "kubernetes-service-node-port", s.KubernetesServiceNodePort, "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.")
	// TODO: delete this flag as soon as we identify and fix all clients that send malformed updates, like #14126.
	fs.BoolVar(&validation.RepairMalformedUpdates, "repair-malformed-updates", validation.RepairMalformedUpdates, "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.")
	fs.StringSliceVar(&s.WatchCacheSizes, "watch-cache-sizes", s.WatchCacheSizes, "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.")
}

// AddFlags adds flags for a specific APIServer to the specified FlagSet
func (s *ServerRunOptions) AddUniversalFlags(fs *pflag.FlagSet) {
	// Note: the weird ""+ in below lines seems to be the only way to get gofmt to
	// arrange these text blocks sensibly. Grrr.

	fs.StringVar(&s.AdmissionControl, "admission-control", s.AdmissionControl, ""+
		"Ordered list of plug-ins to do admission control of resources into cluster. "+
		"Comma-delimited list of: "+strings.Join(admission.GetPlugins(), ", ")+".")

	fs.StringVar(&s.AdmissionControlConfigFile, "admission-control-config-file", s.AdmissionControlConfigFile,
		"File with admission control configuration.")

	fs.IPVar(&s.AdvertiseAddress, "advertise-address", s.AdvertiseAddress, ""+
		"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.")

	fs.StringVar(&s.CloudProvider, "cloud-provider", s.CloudProvider,
		"The provider for cloud services. Empty string for no provider.")

	fs.StringVar(&s.CloudConfigFile, "cloud-config", s.CloudConfigFile,
		"The path to the cloud provider configuration file. Empty string for no configuration file.")

	fs.StringSliceVar(&s.CorsAllowedOriginList, "cors-allowed-origins", s.CorsAllowedOriginList, ""+
		"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.")

	fs.StringVar(&s.DefaultStorageMediaType, "storage-media-type", s.DefaultStorageMediaType, ""+
		"The media type to use to store objects in storage. Defaults to application/json. "+
		"Some resources may only support a specific media type and will ignore this setting.")

	fs.IntVar(&s.DeleteCollectionWorkers, "delete-collection-workers", s.DeleteCollectionWorkers,
		"Number of workers spawned for DeleteCollection call. These are used to speed up namespace cleanup.")

	fs.StringVar(&s.AuditLogPath, "audit-log-path", s.AuditLogPath,
		"If set, all requests coming to the apiserver will be logged to this file.")
	fs.IntVar(&s.AuditLogMaxAge, "audit-log-maxage", s.AuditLogMaxBackups,
		"The maximum number of days to retain old audit log files based on the timestamp encoded in their filename.")
	fs.IntVar(&s.AuditLogMaxBackups, "audit-log-maxbackup", s.AuditLogMaxBackups,
		"The maximum number of old audit log files to retain.")
	fs.IntVar(&s.AuditLogMaxSize, "audit-log-maxsize", s.AuditLogMaxSize,
		"The maximum size in megabytes of the audit log file before it gets rotated. Defaults to 100MB.")

	fs.BoolVar(&s.EnableGarbageCollection, "enable-garbage-collector", s.EnableGarbageCollection, ""+
		"Enables the generic garbage collector. MUST be synced with the corresponding flag "+
		"of the kube-controller-manager.")

	fs.BoolVar(&s.EnableProfiling, "profiling", s.EnableProfiling,
		"Enable profiling via web interface host:port/debug/pprof/")
	fs.BoolVar(&s.EnableContentionProfiling, "contention-profiling", s.EnableContentionProfiling,
		"Enable contention profiling. Requires --profiling to be set to work.")

	fs.BoolVar(&s.EnableSwaggerUI, "enable-swagger-ui", s.EnableSwaggerUI,
		"Enables swagger ui on the apiserver at /swagger-ui")

	// TODO: enable cache in integration tests.
	fs.BoolVar(&s.EnableWatchCache, "watch-cache", s.EnableWatchCache,
		"Enable watch caching in the apiserver")

	fs.IntVar(&s.TargetRAMMB, "target-ram-mb", s.TargetRAMMB,
		"Memory limit for apiserver in MB (used to configure sizes of caches, etc.)")

	fs.StringVar(&s.ExternalHost, "external-hostname", s.ExternalHost,
		"The hostname to use when generating externalized URLs for this master (e.g. Swagger API Docs).")

	// See #14282 for details on how to test/try this option out.
	// TODO: remove this comment once this option is tested in CI.
	fs.IntVar(&s.KubernetesServiceNodePort, "kubernetes-service-node-port", s.KubernetesServiceNodePort, ""+
		"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.")

	// TODO: remove post-1.6
	fs.String("long-running-request-regexp", "", ""+
		"A regular expression matching long running requests which should "+
		"be excluded from maximum inflight request handling.")
	fs.MarkDeprecated("long-running-request-regexp", "regular expression matching of long-running requests is no longer supported")

	fs.IntVar(&s.MasterCount, "apiserver-count", s.MasterCount,
		"The number of apiservers running in the cluster.")

	deprecatedMasterServiceNamespace := api.NamespaceDefault
	fs.StringVar(&deprecatedMasterServiceNamespace, "master-service-namespace", deprecatedMasterServiceNamespace, ""+
		"DEPRECATED: the namespace from which the kubernetes master services should be injected into pods.")

	fs.IntVar(&s.MaxRequestsInFlight, "max-requests-inflight", s.MaxRequestsInFlight, ""+
		"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.")

	fs.IntVar(&s.MaxMutatingRequestsInFlight, "max-mutating-requests-inflight", s.MaxMutatingRequestsInFlight, ""+
		"The maximum number of mutating requests in flight at a given time. When the server exceeds this, "+
		"it rejects requests. Zero for no limit.")

	fs.IntVar(&s.MinRequestTimeout, "min-request-timeout", s.MinRequestTimeout, ""+
		"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.")

//.........这里部分代码省略.........