types.go

/*
Copyright 2015 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package componentconfig

import (
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

// ClientConnectionConfiguration contains details for constructing a client.
type ClientConnectionConfiguration struct {
	// kubeConfigFile is the path to a kubeconfig file.
	KubeConfigFile string
	// acceptContentTypes defines the Accept header sent by clients when connecting to a server, overriding the
	// default value of 'application/json'. This field will control all connections to the server used by a particular
	// client.
	AcceptContentTypes string
	// contentType is the content type used when sending data to the server from this client.
	ContentType string
	// qps controls the number of queries per second allowed for this connection.
	QPS float32
	// burst allows extra queries to accumulate when a client is exceeding its rate.
	Burst int
}

// KubeProxyIPTablesConfiguration contains iptables-related configuration
// details for the Kubernetes proxy server.
type KubeProxyIPTablesConfiguration struct {
	// masqueradeBit is the bit of the iptables fwmark space to use for SNAT if using
	// the pure iptables proxy mode. Values must be within the range [0, 31].
	MasqueradeBit *int32
	// masqueradeAll tells kube-proxy to SNAT everything if using the pure iptables proxy mode.
	MasqueradeAll bool
	// syncPeriod is the period that iptables rules are refreshed (e.g. '5s', '1m',
	// '2h22m').  Must be greater than 0.
	SyncPeriod metav1.Duration
	// minSyncPeriod is the minimum period that iptables rules are refreshed (e.g. '5s', '1m',
	// '2h22m').
	MinSyncPeriod metav1.Duration
}

// KubeProxyConntrackConfiguration contains conntrack settings for
// the Kubernetes proxy server.
type KubeProxyConntrackConfiguration struct {
	// max is the maximum number of NAT connections to track (0 to
	// leave as-is).  This takes precedence over conntrackMaxPerCore and conntrackMin.
	Max int32
	// maxPerCore is the maximum number of NAT connections to track
	// per CPU core (0 to leave the limit as-is and ignore conntrackMin).
	MaxPerCore int32
	// min is the minimum value of connect-tracking records to allocate,
	// regardless of conntrackMaxPerCore (set conntrackMaxPerCore=0 to leave the limit as-is).
	Min int32
	// tcpEstablishedTimeout is how long an idle TCP connection will be kept open
	// (e.g. '2s').  Must be greater than 0.
	TCPEstablishedTimeout metav1.Duration
	// tcpCloseWaitTimeout is how long an idle conntrack entry
	// in CLOSE_WAIT state will remain in the conntrack
	// table. (e.g. '60s'). Must be greater than 0 to set.
	TCPCloseWaitTimeout metav1.Duration
}

// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

// KubeProxyConfiguration contains everything necessary to configure the
// Kubernetes proxy server.
type KubeProxyConfiguration struct {
	metav1.TypeMeta

	// featureGates is a comma-separated list of key=value pairs that control
	// which alpha/beta features are enabled.
	//
	// TODO this really should be a map but that requires refactoring all
	// components to use config files because local-up-cluster.sh only supports
	// the --feature-gates flag right now, which is comma-separated key=value
	// pairs.
	FeatureGates string

	// bindAddress is the IP address for the proxy server to serve on (set to 0.0.0.0
	// for all interfaces)
	BindAddress string
	// healthzBindAddress is the IP address and port for the health check server to serve on,
	// defaulting to 0.0.0.0:10256
	HealthzBindAddress string
	// metricsBindAddress is the IP address and port for the metrics server to serve on,
	// defaulting to 127.0.0.1:10249 (set to 0.0.0.0 for all interfaces)
	MetricsBindAddress string
	// enableProfiling enables profiling via web interface on /debug/pprof handler.
	// Profiling handlers will be handled by metrics server.
	EnableProfiling bool
	// clusterCIDR is the CIDR range of the pods in the cluster. It is used to
	// bridge traffic coming from outside of the cluster. If not provided,
	// no off-cluster bridging will be performed.
	ClusterCIDR string
	// hostnameOverride, if non-empty, will be used as the identity instead of the actual hostname.
	HostnameOverride string
	// clientConnection specifies the kubeconfig file and client connection settings for the proxy
	// server to use when communicating with the apiserver.
	ClientConnection ClientConnectionConfiguration
	// iptables contains iptables-related configuration options.
	IPTables KubeProxyIPTablesConfiguration
	// oomScoreAdj is the oom-score-adj value for kube-proxy process. Values must be within
	// the range [-1000, 1000]
	OOMScoreAdj *int32
	// mode specifies which proxy mode to use.
	Mode ProxyMode
	// portRange is the range of host ports (beginPort-endPort, inclusive) that may be consumed
	// in order to proxy service traffic. If unspecified (0-0) then ports will be randomly chosen.
	PortRange string
	// resourceContainer is the absolute name of the resource-only container to create and run
	// the Kube-proxy in (Default: /kube-proxy).
	ResourceContainer string
	// udpIdleTimeout is how long an idle UDP connection will be kept open (e.g. '250ms', '2s').
	// Must be greater than 0. Only applicable for proxyMode=userspace.
	UDPIdleTimeout metav1.Duration
	// conntrack contains conntrack-related configuration options.
	Conntrack KubeProxyConntrackConfiguration
	// configSyncPeriod is how often configuration from the apiserver is refreshed. Must be greater
	// than 0.
	ConfigSyncPeriod metav1.Duration
}

// Currently two modes of proxying are available: 'userspace' (older, stable) or 'iptables'
// (newer, faster). If blank, use the best-available proxy (currently iptables, but may
// change in future versions).  If the iptables proxy is selected, regardless of how, but
// the system's kernel or iptables versions are insufficient, this always falls back to the
// userspace proxy.
type ProxyMode string

const (
	ProxyModeUserspace ProxyMode = "userspace"
	ProxyModeIPTables  ProxyMode = "iptables"
)

// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

type KubeSchedulerConfiguration struct {
	metav1.TypeMeta

	// port is the port that the scheduler's http service runs on.
	Port int32
	// address is the IP address to serve on.
	Address string
	// algorithmProvider is the scheduling algorithm provider to use.
	AlgorithmProvider string
	// policyConfigFile is the filepath to the scheduler policy configuration.
	PolicyConfigFile string
	// enableProfiling enables profiling via web interface.
	EnableProfiling bool
	// enableContentionProfiling enables lock contention profiling, if enableProfiling is true.
	EnableContentionProfiling bool
	// contentType is contentType of requests sent to apiserver.
	ContentType string
	// kubeAPIQPS is the QPS to use while talking with kubernetes apiserver.
	KubeAPIQPS float32
	// kubeAPIBurst is the QPS burst to use while talking with kubernetes apiserver.
	KubeAPIBurst int32
	// schedulerName is name of the scheduler, used to select which pods
	// will be processed by this scheduler, based on pod's "spec.SchedulerName".
	SchedulerName string
	// RequiredDuringScheduling affinity is not symmetric, but there is an implicit PreferredDuringScheduling affinity rule
	// corresponding to every RequiredDuringScheduling affinity rule.
	// HardPodAffinitySymmetricWeight represents the weight of implicit PreferredDuringScheduling affinity rule, in the range 0-100.
	HardPodAffinitySymmetricWeight int
	// Indicate the "all topologies" set for empty topologyKey when it's used for PreferredDuringScheduling pod anti-affinity.
	// DEPRECATED: This is no longer used.
	FailureDomains string
	// leaderElection defines the configuration of leader election client.
	LeaderElection LeaderElectionConfiguration
	// LockObjectNamespace defines the namespace of the lock object
	LockObjectNamespace string
	// LockObjectName defines the lock object name
	LockObjectName string
	// PolicyConfigMapName is the name of the ConfigMap object that specifies
	// the scheduler's policy config. If UseLegacyPolicyConfig is true, scheduler
	// uses PolicyConfigFile. If UseLegacyPolicyConfig is false and
	// PolicyConfigMapName is not empty, the ConfigMap object with this name must
	// exist in PolicyConfigMapNamespace before scheduler initialization.
	PolicyConfigMapName string
	// PolicyConfigMapNamespace is the namespace where the above policy config map
	// is located. If none is provided default system namespace ("kube-system")
	// will be used.
	PolicyConfigMapNamespace string
	// UseLegacyPolicyConfig tells the scheduler to ignore Policy ConfigMap and
	// to use PolicyConfigFile if available.
	UseLegacyPolicyConfig bool
}

// LeaderElectionConfiguration defines the configuration of leader election
// clients for components that can run with leader election enabled.
type LeaderElectionConfiguration struct {
	// leaderElect enables a leader election client to gain leadership
	// before executing the main loop. Enable this when running replicated
	// components for high availability.
	LeaderElect bool
	// leaseDuration is the duration that non-leader candidates will wait
	// after observing a leadership renewal until attempting to acquire
	// leadership of a led but unrenewed leader slot. This is effectively the
	// maximum duration that a leader can be stopped before it is replaced
	// by another candidate. This is only applicable if leader election is
	// enabled.
	LeaseDuration metav1.Duration
	// renewDeadline is the interval between attempts by the acting master to
	// renew a leadership slot before it stops leading. This must be less
	// than or equal to the lease duration. This is only applicable if leader
	// election is enabled.
	RenewDeadline metav1.Duration
	// retryPeriod is the duration the clients should wait between attempting
	// acquisition and renewal of a leadership. This is only applicable if
	// leader election is enabled.
	RetryPeriod metav1.Duration
	// resourceLock indicates the resource object type that will be used to lock
	// during leader election cycles.
	ResourceLock string
}

type GroupResource struct {
	// group is the group portion of the GroupResource.
	Group string
	// resource is the resource portion of the GroupResource.
	Resource string
}

// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

type KubeControllerManagerConfiguration struct {
	metav1.TypeMeta

	// Controllers is the list of controllers to enable or disable
	// '*' means "all enabled by default controllers"
	// 'foo' means "enable 'foo'"
	// '-foo' means "disable 'foo'"
	// first item for a particular name wins
	Controllers []string

	// port is the port that the controller-manager's http service runs on.
	Port int32
	// address is the IP address to serve on (set to 0.0.0.0 for all interfaces).
	Address string
	// useServiceAccountCredentials indicates whether controllers should be run with
	// individual service account credentials.
	UseServiceAccountCredentials bool
	// cloudProvider is the provider for cloud services.
	CloudProvider string
	// cloudConfigFile is the path to the cloud provider configuration file.
	CloudConfigFile string
	// run with untagged cloud instances
	AllowUntaggedCloud bool
	// concurrentEndpointSyncs is the number of endpoint syncing operations
	// that will be done concurrently. Larger number = faster endpoint updating,
	// but more CPU (and network) load.
	ConcurrentEndpointSyncs int32
	// concurrentRSSyncs is the number of replica sets that are  allowed to sync
	// concurrently. Larger number = more responsive replica  management, but more
	// CPU (and network) load.
	ConcurrentRSSyncs int32
	// concurrentRCSyncs is the number of replication controllers that are
	// allowed to sync concurrently. Larger number = more responsive replica
	// management, but more CPU (and network) load.
	ConcurrentRCSyncs int32
	// concurrentServiceSyncs is the number of services that are
	// allowed to sync concurrently. Larger number = more responsive service
	// management, but more CPU (and network) load.
	ConcurrentServiceSyncs int32
	// concurrentResourceQuotaSyncs is the number of resource quotas that are
	// allowed to sync concurrently. Larger number = more responsive quota
	// management, but more CPU (and network) load.
	ConcurrentResourceQuotaSyncs int32
	// concurrentDeploymentSyncs is the number of deployment objects that are
	// allowed to sync concurrently. Larger number = more responsive deployments,
	// but more CPU (and network) load.
	ConcurrentDeploymentSyncs int32
	// concurrentDaemonSetSyncs is the number of daemonset objects that are
	// allowed to sync concurrently. Larger number = more responsive daemonset,
	// but more CPU (and network) load.
	ConcurrentDaemonSetSyncs int32
	// concurrentJobSyncs is the number of job objects that are
	// allowed to sync concurrently. Larger number = more responsive jobs,
	// but more CPU (and network) load.
	ConcurrentJobSyncs int32
	// concurrentNamespaceSyncs is the number of namespace objects that are
	// allowed to sync concurrently.
	ConcurrentNamespaceSyncs int32
	// concurrentSATokenSyncs is the number of service account token syncing operations
	// that will be done concurrently.
	ConcurrentSATokenSyncs int32
	// lookupCacheSizeForRC is the size of lookup cache for replication controllers.
	// Larger number = more responsive replica management, but more MEM load.
	// serviceSyncPeriod is the period for syncing services with their external
	// load balancers.
	ServiceSyncPeriod metav1.Duration
	// nodeSyncPeriod is the period for syncing nodes from cloudprovider. Longer
	// periods will result in fewer calls to cloud provider, but may delay addition
	// of new nodes to cluster.
	NodeSyncPeriod metav1.Duration
	// routeReconciliationPeriod is the period for reconciling routes created for Nodes by cloud provider..
	RouteReconciliationPeriod metav1.Duration
	// resourceQuotaSyncPeriod is the period for syncing quota usage status
	// in the system.
	ResourceQuotaSyncPeriod metav1.Duration
	// namespaceSyncPeriod is the period for syncing namespace life-cycle
	// updates.
	NamespaceSyncPeriod metav1.Duration
	// pvClaimBinderSyncPeriod is the period for syncing persistent volumes
	// and persistent volume claims.
	PVClaimBinderSyncPeriod metav1.Duration
	// minResyncPeriod is the resync period in reflectors; will be random between
	// minResyncPeriod and 2*minResyncPeriod.
	MinResyncPeriod metav1.Duration
	// terminatedPodGCThreshold is the number of terminated pods that can exist
	// before the terminated pod garbage collector starts deleting terminated pods.
	// If <= 0, the terminated pod garbage collector is disabled.
	TerminatedPodGCThreshold int32
	// horizontalPodAutoscalerSyncPeriod is the period for syncing the number of
	// pods in horizontal pod autoscaler.
	HorizontalPodAutoscalerSyncPeriod metav1.Duration
	// horizontalPodAutoscalerUpscaleForbiddenWindow is a period after which next upscale allowed.
	HorizontalPodAutoscalerUpscaleForbiddenWindow metav1.Duration
	// horizontalPodAutoscalerDownscaleForbiddenWindow is a period after which next downscale allowed.
	HorizontalPodAutoscalerDownscaleForbiddenWindow metav1.Duration
	// deploymentControllerSyncPeriod is the period for syncing the deployments.
	DeploymentControllerSyncPeriod metav1.Duration
	// podEvictionTimeout is the grace period for deleting pods on failed nodes.
	PodEvictionTimeout metav1.Duration
	// DEPRECATED: deletingPodsQps is the number of nodes per second on which pods are deleted in
	// case of node failure.
	DeletingPodsQps float32
	// DEPRECATED: deletingPodsBurst is the number of nodes on which pods are bursty deleted in
	// case of node failure. For more details look into RateLimiter.
	DeletingPodsBurst int32
	// nodeMontiorGracePeriod is the amount of time which we allow a running node to be
	// unresponsive before marking it unhealthy. Must be N times more than kubelet's
	// nodeStatusUpdateFrequency, where N means number of retries allowed for kubelet
	// to post node status.
	NodeMonitorGracePeriod metav1.Duration
	// registerRetryCount is the number of retries for initial node registration.
	// Retry interval equals node-sync-period.
	RegisterRetryCount int32
	// nodeStartupGracePeriod is the amount of time which we allow starting a node to
	// be unresponsive before marking it unhealthy.
	NodeStartupGracePeriod metav1.Duration
	// nodeMonitorPeriod is the period for syncing NodeStatus in NodeController.
	NodeMonitorPeriod metav1.Duration
	// serviceAccountKeyFile is the filename containing a PEM-encoded private RSA key
	// used to sign service account tokens.
	ServiceAccountKeyFile string
	// clusterSigningCertFile is the filename containing a PEM-encoded
	// X509 CA certificate used to issue cluster-scoped certificates
	ClusterSigningCertFile string
	// clusterSigningCertFile is the filename containing a PEM-encoded
	// RSA or ECDSA private key used to issue cluster-scoped certificates
	ClusterSigningKeyFile string
	// clusterSigningDuration is the length of duration signed certificates
	// will be given.
	ClusterSigningDuration metav1.Duration
	// enableProfiling enables profiling via web interface host:port/debug/pprof/
	EnableProfiling bool
	// enableContentionProfiling enables lock contention profiling, if enableProfiling is true.
	EnableContentionProfiling bool
	// clusterName is the instance prefix for the cluster.
	ClusterName string
	// clusterCIDR is CIDR Range for Pods in cluster.
	ClusterCIDR string
	// serviceCIDR is CIDR Range for Services in cluster.
	ServiceCIDR string
	// NodeCIDRMaskSize is the mask size for node cidr in cluster.
	NodeCIDRMaskSize int32
	// AllocateNodeCIDRs enables CIDRs for Pods to be allocated and, if
	// ConfigureCloudRoutes is true, to be set on the cloud provider.
	AllocateNodeCIDRs bool
	// CIDRAllocatorType determines what kind of pod CIDR allocator will be used.
	CIDRAllocatorType string
	// configureCloudRoutes enables CIDRs allocated with allocateNodeCIDRs
	// to be configured on the cloud provider.
	ConfigureCloudRoutes bool
	// rootCAFile is the root certificate authority will be included in service
	// account's token secret. This must be a valid PEM-encoded CA bundle.
	RootCAFile string
	// contentType is contentType of requests sent to apiserver.
	ContentType string
	// kubeAPIQPS is the QPS to use while talking with kubernetes apiserver.
	KubeAPIQPS float32
	// kubeAPIBurst is the burst to use while talking with kubernetes apiserver.
	KubeAPIBurst int32
	// leaderElection defines the configuration of leader election client.
	LeaderElection LeaderElectionConfiguration
	// volumeConfiguration holds configuration for volume related features.
	VolumeConfiguration VolumeConfiguration
	// How long to wait between starting controller managers
	ControllerStartInterval metav1.Duration
	// enables the generic garbage collector. MUST be synced with the
	// corresponding flag of the kube-apiserver. WARNING: the generic garbage
	// collector is an alpha feature.
	EnableGarbageCollector bool
	// concurrentGCSyncs is the number of garbage collector workers that are
	// allowed to sync concurrently.
	ConcurrentGCSyncs int32
	// gcIgnoredResources is the list of GroupResources that garbage collection should ignore.
	GCIgnoredResources []GroupResource
	// nodeEvictionRate is the number of nodes per second on which pods are deleted in case of node failure when a zone is healthy
	NodeEvictionRate float32
	// secondaryNodeEvictionRate is the number of nodes per second on which pods are deleted in case of node failure when a zone is unhealthy
	SecondaryNodeEvictionRate float32
	// secondaryNodeEvictionRate is implicitly overridden to 0 for clusters smaller than or equal to largeClusterSizeThreshold
	LargeClusterSizeThreshold int32
	// Zone is treated as unhealthy in nodeEvictionRate and secondaryNodeEvictionRate when at least
	// unhealthyZoneThreshold (no less than 3) of Nodes in the zone are NotReady
	UnhealthyZoneThreshold float32
	// Reconciler runs a periodic loop to reconcile the desired state of the with
	// the actual state of the world by triggering attach detach operations.
	// This flag enables or disables reconcile.  Is false by default, and thus enabled.
	DisableAttachDetachReconcilerSync bool
	// ReconcilerSyncLoopPeriod is the amount of time the reconciler sync states loop
	// wait between successive executions. Is set to 5 sec by default.
	ReconcilerSyncLoopPeriod metav1.Duration
	// If set to true enables NoExecute Taints and will evict all not-tolerating
	// Pod running on Nodes tainted with this kind of Taints.
	EnableTaintManager bool
	// HorizontalPodAutoscalerUseRESTClients causes the HPA controller to use REST clients
	// through the kube-aggregator when enabled, instead of using the legacy metrics client
	// through the API server proxy.
	HorizontalPodAutoscalerUseRESTClients bool
}

// VolumeConfiguration contains *all* enumerated flags meant to configure all volume
// plugins. From this config, the controller-manager binary will create many instances of
// volume.VolumeConfig, each containing only the configuration needed for that plugin which
// are then passed to the appropriate plugin. The ControllerManager binary is the only part
// of the code which knows what plugins are supported and which flags correspond to each plugin.
type VolumeConfiguration struct {
	// enableHostPathProvisioning enables HostPath PV provisioning when running without a
	// cloud provider. This allows testing and development of provisioning features. HostPath
	// provisioning is not supported in any way, won't work in a multi-node cluster, and
	// should not be used for anything other than testing or development.
	EnableHostPathProvisioning bool
	// enableDynamicProvisioning enables the provisioning of volumes when running within an environment
	// that supports dynamic provisioning. Defaults to true.
	EnableDynamicProvisioning bool
	// persistentVolumeRecyclerConfiguration holds configuration for persistent volume plugins.
	PersistentVolumeRecyclerConfiguration PersistentVolumeRecyclerConfiguration
	// volumePluginDir is the full path of the directory in which the flex
	// volume plugin should search for additional third party volume plugins
	FlexVolumePluginDir string
}

type PersistentVolumeRecyclerConfiguration struct {
	// maximumRetry is number of retries the PV recycler will execute on failure to recycle
	// PV.
	MaximumRetry int32
	// minimumTimeoutNFS is the minimum ActiveDeadlineSeconds to use for an NFS Recycler
	// pod.
	MinimumTimeoutNFS int32
	// podTemplateFilePathNFS is the file path to a pod definition used as a template for
	// NFS persistent volume recycling
	PodTemplateFilePathNFS string
	// incrementTimeoutNFS is the increment of time added per Gi to ActiveDeadlineSeconds
	// for an NFS scrubber pod.
	IncrementTimeoutNFS int32
	// podTemplateFilePathHostPath is the file path to a pod definition used as a template for
	// HostPath persistent volume recycling. This is for development and testing only and
	// will not work in a multi-node cluster.
	PodTemplateFilePathHostPath string
	// minimumTimeoutHostPath is the minimum ActiveDeadlineSeconds to use for a HostPath
	// Recycler pod.  This is for development and testing only and will not work in a multi-node
	// cluster.
	MinimumTimeoutHostPath int32
	// incrementTimeoutHostPath is the increment of time added per Gi to ActiveDeadlineSeconds
	// for a HostPath scrubber pod.  This is for development and testing only and will not work
	// in a multi-node cluster.
	IncrementTimeoutHostPath int32
}

const (
	// "kube-system" is the default scheduler lock object namespace
	SchedulerDefaultLockObjectNamespace string = "kube-system"

	// "kube-scheduler" is the default scheduler lock object name
	SchedulerDefaultLockObjectName = "kube-scheduler"
)