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types.go
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/*
Copyright 2014 Google Inc. All rights reserved.
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 api
import (
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/resource"
"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
"github.com/GoogleCloudPlatform/kubernetes/pkg/types"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
)
// Common string formats
// ---------------------
// Many fields in this API have formatting requirements. The commonly used
// formats are defined here.
//
// C_IDENTIFIER: This is a string that conforms to the definition of an "identifier"
// in the C language. This is captured by the following regex:
// [A-Za-z_][A-Za-z0-9_]*
// This defines the format, but not the length restriction, which should be
// specified at the definition of any field of this type.
//
// DNS_LABEL: This is a string, no more than 63 characters long, that conforms
// to the definition of a "label" in RFCs 1035 and 1123. This is captured
// by the following regex:
// [a-z0-9]([-a-z0-9]*[a-z0-9])?
//
// DNS_SUBDOMAIN: This is a string, no more than 253 characters long, that conforms
// to the definition of a "subdomain" in RFCs 1035 and 1123. This is captured
// by the following regex:
// [a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*
// or more simply:
// DNS_LABEL(\.DNS_LABEL)*
// TypeMeta describes an individual object in an API response or request
// with strings representing the type of the object and its API schema version.
// Structures that are versioned or persisted should inline TypeMeta.
type TypeMeta struct {
// Kind is a string value representing the REST resource this object represents.
// Servers may infer this from the endpoint the client submits requests to.
Kind string `json:"kind,omitempty"`
// APIVersion defines the versioned schema of this representation of an object.
// Servers should convert recognized schemas to the latest internal value, and
// may reject unrecognized values.
APIVersion string `json:"apiVersion,omitempty"`
}
// ListMeta describes metadata that synthetic resources must have, including lists and
// various status objects. A resource may have only one of {ObjectMeta, ListMeta}.
type ListMeta struct {
// SelfLink is a URL representing this object.
SelfLink string `json:"selfLink,omitempty"`
// An opaque value that represents the version of this response for use with optimistic
// concurrency and change monitoring endpoints. Clients must treat these values as opaque
// and values may only be valid for a particular resource or set of resources. Only servers
// will generate resource versions.
ResourceVersion string `json:"resourceVersion,omitempty"`
}
// ObjectMeta is metadata that all persisted resources must have, which includes all objects
// users must create.
type ObjectMeta struct {
// Name is unique within a namespace. Name is required when creating resources, although
// some resources may allow a client to request the generation of an appropriate name
// automatically. Name is primarily intended for creation idempotence and configuration
// definition.
Name string `json:"name,omitempty"`
// GenerateName indicates that the name should be made unique by the server prior to persisting
// it. A non-empty value for the field indicates the name will be made unique (and the name
// returned to the client will be different than the name passed). The value of this field will
// be combined with a unique suffix on the server if the Name field has not been provided.
// The provided value must be valid within the rules for Name, and may be truncated by the length
// of the suffix required to make the value unique on the server.
//
// If this field is specified, and Name is not present, the server will NOT return a 409 if the
// generated name exists - instead, it will either return 201 Created or 500 with Reason
// TryAgainLater indicating a unique name could not be found in the time allotted, and the client
// should retry (optionally after the time indicated in the Retry-After header).
GenerateName string `json:"generateName,omitempty"`
// Namespace defines the space within which name must be unique. An empty namespace is
// equivalent to the "default" namespace, but "default" is the canonical representation.
// Not all objects are required to be scoped to a namespace - the value of this field for
// those objects will be empty.
Namespace string `json:"namespace,omitempty"`
// SelfLink is a URL representing this object.
SelfLink string `json:"selfLink,omitempty"`
// UID is the unique in time and space value for this object. It is typically generated by
// the server on successful creation of a resource and is not allowed to change on PUT
// operations.
UID types.UID `json:"uid,omitempty"`
// An opaque value that represents the version of this resource. May be used for optimistic
// concurrency, change detection, and the watch operation on a resource or set of resources.
// Clients must treat these values as opaque and values may only be valid for a particular
// resource or set of resources. Only servers will generate resource versions.
ResourceVersion string `json:"resourceVersion,omitempty"`
// CreationTimestamp is a timestamp representing the server time when this object was
// created. It is not guaranteed to be set in happens-before order across separate operations.
// Clients may not set this value. It is represented in RFC3339 form and is in UTC.
CreationTimestamp util.Time `json:"creationTimestamp,omitempty"`
// Labels are key value pairs that may be used to scope and select individual resources.
// Label keys are of the form:
// label-key ::= prefixed-name | name
// prefixed-name ::= prefix '/' name
// prefix ::= DNS_SUBDOMAIN
// name ::= DNS_LABEL
// The prefix is optional. If the prefix is not specified, the key is assumed to be private
// to the user. Other system components that wish to use labels must specify a prefix. The
// "kubernetes.io/" prefix is reserved for use by kubernetes components.
// TODO: replace map[string]string with labels.LabelSet type
Labels map[string]string `json:"labels,omitempty"`
// Annotations are unstructured key value data stored with a resource that may be set by
// external tooling. They are not queryable and should be preserved when modifying
// objects. Annotation keys have the same formatting restrictions as Label keys. See the
// comments on Labels for details.
Annotations map[string]string `json:"annotations,omitempty"`
}
const (
// NamespaceDefault means the object is in the default namespace which is applied when not specified by clients
NamespaceDefault string = "default"
// NamespaceAll is the default argument to specify on a context when you want to list or filter resources across all namespaces
NamespaceAll string = ""
// NamespaceNone is the argument for a context when there is no namespace.
NamespaceNone string = ""
// TerminationMessagePathDefault means the default path to capture the application termination message running in a container
TerminationMessagePathDefault string = "/dev/termination-log"
)
// Volume represents a named volume in a pod that may be accessed by any containers in the pod.
type Volume struct {
// Required: This must be a DNS_LABEL. Each volume in a pod must have
// a unique name.
Name string `json:"name"`
// Source represents the location and type of a volume to mount.
// This is optional for now. If not specified, the Volume is implied to be an EmptyDir.
// This implied behavior is deprecated and will be removed in a future version.
Source VolumeSource `json:"source,omitempty"`
}
// VolumeSource represents the source location of a volume to mount.
// Only one of its members may be specified.
type VolumeSource struct {
// HostPath represents file or directory on the host machine that is
// directly exposed to the container. This is generally used for system
// agents or other privileged things that are allowed to see the host
// machine. Most containers will NOT need this.
// TODO(jonesdl) We need to restrict who can use host directory mounts and who can/can not
// mount host directories as read/write.
HostPath *HostPath `json:"hostPath"`
// EmptyDir represents a temporary directory that shares a pod's lifetime.
EmptyDir *EmptyDir `json:"emptyDir"`
// GCEPersistentDisk represents a GCE Disk resource that is attached to a
// kubelet's host machine and then exposed to the pod.
GCEPersistentDisk *GCEPersistentDisk `json:"persistentDisk"`
// GitRepo represents a git repository at a particular revision.
GitRepo *GitRepo `json:"gitRepo"`
}
// HostPath represents bare host directory volume.
type HostPath struct {
Path string `json:"path"`
}
type EmptyDir struct{}
// Protocol defines network protocols supported for things like conatiner ports.
type Protocol string
const (
// ProtocolTCP is the TCP protocol.
ProtocolTCP Protocol = "TCP"
// ProtocolUDP is the UDP protocol.
ProtocolUDP Protocol = "UDP"
)
// GCEPersistentDisk represents a Persistent Disk resource in Google Compute Engine.
//
// A GCE PD must exist and be formatted before mounting to a container.
// The disk must also be in the same GCE project and zone as the kubelet.
// A GCE PD can only be mounted as read/write once.
type GCEPersistentDisk struct {
// Unique name of the PD resource. Used to identify the disk in GCE
PDName string `json:"pdName"`
// Required: Filesystem type to mount.
// Must be a filesystem type supported by the host operating system.
// Ex. "ext4", "xfs", "ntfs"
// TODO: how do we prevent errors in the filesystem from compromising the machine
FSType string `json:"fsType,omitempty"`
// Optional: Partition on the disk to mount.
// If omitted, kubelet will attempt to mount the device name.
// Ex. For /dev/sda1, this field is "1", for /dev/sda, this field is 0 or empty.
Partition int `json:"partition,omitempty"`
// Optional: Defaults to false (read/write). ReadOnly here will force
// the ReadOnly setting in VolumeMounts.
ReadOnly bool `json:"readOnly,omitempty"`
}
// GitRepo represents a volume that is pulled from git when the pod is created.
type GitRepo struct {
// Repository URL
Repository string `json:"repository"`
// Commit hash, this is optional
Revision string `json:"revision"`
// TODO: Consider credentials here.
}
// Port represents a network port in a single container
type Port struct {
// Optional: If specified, this must be a DNS_LABEL. Each named port
// in a pod must have a unique name.
Name string `json:"name,omitempty"`
// Optional: If specified, this must be a valid port number, 0 < x < 65536.
HostPort int `json:"hostPort,omitempty"`
// Required: This must be a valid port number, 0 < x < 65536.
ContainerPort int `json:"containerPort"`
// Optional: Supports "TCP" and "UDP". Defaults to "TCP".
Protocol Protocol `json:"protocol,omitempty"`
// Optional: What host IP to bind the external port to.
HostIP string `json:"hostIP,omitempty"`
}
// VolumeMount describes a mounting of a Volume within a container.
type VolumeMount struct {
// Required: This must match the Name of a Volume [above].
Name string `json:"name"`
// Optional: Defaults to false (read-write).
ReadOnly bool `json:"readOnly,omitempty"`
// Required.
MountPath string `json:"mountPath"`
}
// EnvVar represents an environment variable present in a Container.
type EnvVar struct {
// Required: This must be a C_IDENTIFIER.
Name string `json:"name"`
// Optional: defaults to "".
Value string `json:"value,omitempty"`
}
// HTTPGetAction describes an action based on HTTP Get requests.
type HTTPGetAction struct {
// Optional: Path to access on the HTTP server.
Path string `json:"path,omitempty"`
// Required: Name or number of the port to access on the container.
Port util.IntOrString `json:"port,omitempty"`
// Optional: Host name to connect to, defaults to the pod IP.
Host string `json:"host,omitempty"`
}
// TCPSocketAction describes an action based on opening a socket
type TCPSocketAction struct {
// Required: Port to connect to.
Port util.IntOrString `json:"port,omitempty"`
}
// ExecAction describes a "run in container" action.
type ExecAction struct {
// Command is the command line to execute inside the container, the working directory for the
// command is root ('/') in the container's filesystem. The command is simply exec'd, it is
// not run inside a shell, so traditional shell instructions ('|', etc) won't work. To use
// a shell, you need to explicitly call out to that shell.
Command []string `json:"command,omitempty"`
}
// Probe describes a liveness probe to be examined to the container.
type Probe struct {
// The action taken to determine the health of a container
Handler `json:",inline"`
// Length of time before health checking is activated. In seconds.
InitialDelaySeconds int64 `json:"initialDelaySeconds,omitempty"`
}
// PullPolicy describes a policy for if/when to pull a container image
type PullPolicy string
const (
// PullAlways means that kubelet always attempts to pull the latest image. Container will fail If the pull fails.
PullAlways PullPolicy = "Always"
// PullNever means that kubelet never pulls an image, but only uses a local image. Container will fail if the image isn't present
PullNever PullPolicy = "Never"
// PullIfNotPresent means that kubelet pulls if the image isn't present on disk. Container will fail if the image isn't present and the pull fails.
PullIfNotPresent PullPolicy = "IfNotPresent"
)
// CapabilityType represent POSIX capabilities type
type CapabilityType string
// Capabilities represent POSIX capabilities that can be added or removed to a running container.
type Capabilities struct {
// Added capabilities
Add []CapabilityType `json:"add,omitempty"`
// Removed capabilities
Drop []CapabilityType `json:"drop,omitempty"`
}
// ResourceRequirementSpec describes the compute resource requirements.
type ResourceRequirementSpec struct {
// Limits describes the maximum amount of compute resources required.
Limits ResourceList `json:"limits,omitempty"`
}
// Container represents a single container that is expected to be run on the host.
type Container struct {
// Required: This must be a DNS_LABEL. Each container in a pod must
// have a unique name.
Name string `json:"name"`
// Required.
Image string `json:"image"`
// Optional: Defaults to whatever is defined in the image.
Command []string `json:"command,omitempty"`
// Optional: Defaults to Docker's default.
WorkingDir string `json:"workingDir,omitempty"`
Ports []Port `json:"ports,omitempty"`
Env []EnvVar `json:"env,omitempty"`
// Compute resource requirements.
Resources ResourceRequirementSpec `json:"resources,omitempty"`
VolumeMounts []VolumeMount `json:"volumeMounts,omitempty"`
LivenessProbe *Probe `json:"livenessProbe,omitempty"`
Lifecycle *Lifecycle `json:"lifecycle,omitempty"`
// Optional: Defaults to /dev/termination-log
TerminationMessagePath string `json:"terminationMessagePath,omitempty"`
// Optional: Default to false.
Privileged bool `json:"privileged,omitempty"`
// Optional: Policy for pulling images for this container
ImagePullPolicy PullPolicy `json:"imagePullPolicy"`
// Optional: Capabilities for container.
Capabilities Capabilities `json:"capabilities,omitempty"`
}
// Handler defines a specific action that should be taken
// TODO: pass structured data to these actions, and document that data here.
type Handler struct {
// One and only one of the following should be specified.
// Exec specifies the action to take.
Exec *ExecAction `json:"exec,omitempty"`
// HTTPGet specifies the http request to perform.
HTTPGet *HTTPGetAction `json:"httpGet,omitempty"`
// TCPSocket specifies an action involving a TCP port.
// TODO: implement a realistic TCP lifecycle hook
TCPSocket *TCPSocketAction `json:"tcpSocket,omitempty"`
}
// Lifecycle describes actions that the management system should take in response to container lifecycle
// events. For the PostStart and PreStop lifecycle handlers, management of the container blocks
// until the action is complete, unless the container process fails, in which case the handler is aborted.
type Lifecycle struct {
// PostStart is called immediately after a container is created. If the handler fails, the container
// is terminated and restarted.
PostStart *Handler `json:"postStart,omitempty"`
// PreStop is called immediately before a container is terminated. The reason for termination is
// passed to the handler. Regardless of the outcome of the handler, the container is eventually terminated.
PreStop *Handler `json:"preStop,omitempty"`
}
// The below types are used by kube_client and api_server.
// PodPhase is a label for the condition of a pod at the current time.
type PodPhase string
// These are the valid statuses of pods.
const (
// PodPending means the pod has been accepted by the system, but one or more of the containers
// has not been started. This includes time before being bound to a node, as well as time spent
// pulling images onto the host.
PodPending PodPhase = "Pending"
// PodRunning means the pod has been bound to a node and all of the containers have been started.
// At least one container is still running or is in the process of being restarted.
PodRunning PodPhase = "Running"
// PodSucceeded means that all containers in the pod have voluntarily terminated
// with a container exit code of 0, and the system is not going to restart any of these containers.
PodSucceeded PodPhase = "Succeeded"
// PodFailed means that all containers in the pod have terminated, and at least one container has
// terminated in a failure (exited with a non-zero exit code or was stopped by the system).
PodFailed PodPhase = "Failed"
// PodUnknown means that for some reason the state of the pod could not be obtained, typically due
// to an error in communicating with the host of the pod.
PodUnknown PodPhase = "Unknown"
)
type ContainerStateWaiting struct {
// Reason could be pulling image,
Reason string `json:"reason,omitempty"`
}
type ContainerStateRunning struct {
StartedAt util.Time `json:"startedAt,omitempty"`
}
type ContainerStateTerminated struct {
ExitCode int `json:"exitCode"`
Signal int `json:"signal,omitempty"`
Reason string `json:"reason,omitempty"`
Message string `json:"message,omitempty"`
StartedAt util.Time `json:"startedAt,omitempty"`
FinishedAt util.Time `json:"finishedAt,omitempty"`
}
// ContainerState holds a possible state of container.
// Only one of its members may be specified.
// If none of them is specified, the default one is ContainerStateWaiting.
type ContainerState struct {
Waiting *ContainerStateWaiting `json:"waiting,omitempty"`
Running *ContainerStateRunning `json:"running,omitempty"`
Termination *ContainerStateTerminated `json:"termination,omitempty"`
}
type ContainerStatus struct {
// TODO(dchen1107): Should we rename PodStatus to a more generic name or have a separate states
// defined for container?
State ContainerState `json:"state,omitempty"`
// Note that this is calculated from dead containers. But those containers are subject to
// garbage collection. This value will get capped at 5 by GC.
RestartCount int `json:"restartCount"`
// TODO(dchen1107): Deprecated this soon once we pull entire PodStatus from node,
// not just PodInfo. Now we need this to remove docker.Container from API
PodIP string `json:"podIP,omitempty"`
// TODO(dchen1107): Need to decide how to represent this in v1beta3
Image string `json:"image"`
ContainerID string `json:"containerID,omitempty" description:"container's ID in the format 'docker://<container_id>'"`
}
// PodInfo contains one entry for every container with available info.
type PodInfo map[string]ContainerStatus
// PodContainerInfo is a wrapper for PodInfo that can be encode/decoded
// DEPRECATED: Replaced with PodStatusResult
type PodContainerInfo struct {
TypeMeta `json:",inline"`
ObjectMeta `json:"metadata,omitempty"`
ContainerInfo PodInfo `json:"containerInfo"`
}
type RestartPolicyAlways struct{}
// TODO(dchen1107): Define what kinds of failures should restart.
// TODO(dchen1107): Decide whether to support policy knobs, and, if so, which ones.
type RestartPolicyOnFailure struct{}
type RestartPolicyNever struct{}
// RestartPolicy describes how the container should be restarted.
// Only one of the following restart policies may be specified.
// If none of the following policies is specified, the default one
// is RestartPolicyAlways.
type RestartPolicy struct {
Always *RestartPolicyAlways `json:"always,omitempty"`
OnFailure *RestartPolicyOnFailure `json:"onFailure,omitempty"`
Never *RestartPolicyNever `json:"never,omitempty"`
}
// PodList is a list of Pods.
type PodList struct {
TypeMeta `json:",inline"`
ListMeta `json:"metadata,omitempty"`
Items []Pod `json:"items"`
}
// DNSPolicy defines how a pod's DNS will be configured.
type DNSPolicy string
const (
// DNSClusterFirst indicates that the pod should use cluster DNS
// first, if it is available, then fall back on the default (as
// determined by kubelet) DNS settings.
DNSClusterFirst DNSPolicy = "ClusterFirst"
// DNSDefault indicates that the pod should use the default (as
// determined by kubelet) DNS settings.
DNSDefault DNSPolicy = "Default"
)
// PodSpec is a description of a pod
type PodSpec struct {
Volumes []Volume `json:"volumes"`
Containers []Container `json:"containers"`
RestartPolicy RestartPolicy `json:"restartPolicy,omitempty"`
// Optional: Set DNS policy. Defaults to "ClusterFirst"
DNSPolicy DNSPolicy `json:"dnsPolicy,omitempty"`
// NodeSelector is a selector which must be true for the pod to fit on a node
NodeSelector map[string]string `json:"nodeSelector,omitempty"`
// Host is a request to schedule this pod onto a specific host. If it is non-empty,
// the the scheduler simply schedules this pod onto that host, assuming that it fits
// resource requirements.
Host string `json:"host,omitempty"`
}
// PodStatus represents information about the status of a pod. Status may trail the actual
// state of a system.
type PodStatus struct {
Phase PodPhase `json:"phase,omitempty"`
// A human readable message indicating details about why the pod is in this state.
Message string `json:"message,omitempty"`
// Host is the name of the node that this Pod is currently bound to, or empty if no
// assignment has been done.
Host string `json:"host,omitempty"`
HostIP string `json:"hostIP,omitempty"`
PodIP string `json:"podIP,omitempty"`
// The key of this map is the *name* of the container within the manifest; it has one
// entry per container in the manifest. The value of this map is currently the output
// of `docker inspect`. This output format is *not* final and should not be relied
// upon.
// TODO: Make real decisions about what our info should look like. Re-enable fuzz test
// when we have done this.
Info PodInfo `json:"info,omitempty"`
}
// PodStatusResult is a wrapper for PodStatus returned by kubelet that can be encode/decoded
type PodStatusResult struct {
TypeMeta `json:",inline"`
ObjectMeta `json:"metadata,omitempty"`
// Status represents the current information about a pod. This data may not be up
// to date.
Status PodStatus `json:"status,omitempty"`
}
// Pod is a collection of containers, used as either input (create, update) or as output (list, get).
type Pod struct {
TypeMeta `json:",inline"`
ObjectMeta `json:"metadata,omitempty"`
// Spec defines the behavior of a pod.
Spec PodSpec `json:"spec,omitempty"`
// Status represents the current information about a pod. This data may not be up
// to date.
Status PodStatus `json:"status,omitempty"`
}
// PodTemplateSpec describes the data a pod should have when created from a template
type PodTemplateSpec struct {
// Metadata of the pods created from this template.
ObjectMeta `json:"metadata,omitempty"`
// Spec defines the behavior of a pod.
Spec PodSpec `json:"spec,omitempty"`
}
// PodTemplate describes a template for creating copies of a predefined pod.
type PodTemplate struct {
TypeMeta `json:",inline"`
ObjectMeta `json:"metadata,omitempty"`
// Spec defines the pods that will be created from this template
Spec PodTemplateSpec `json:"spec,omitempty"`
}
// PodTemplateList is a list of PodTemplates.
type PodTemplateList struct {
TypeMeta `json:",inline"`
ListMeta `json:"metadata,omitempty"`
Items []PodTemplate `json:"items"`
}
// ReplicationControllerSpec is the specification of a replication controller.
// As the internal representation of a replication controller, it may have either
// a TemplateRef or a Template set.
type ReplicationControllerSpec struct {
// Replicas is the number of desired replicas.
Replicas int `json:"replicas"`
// Selector is a label query over pods that should match the Replicas count.
Selector map[string]string `json:"selector"`
// TemplateRef is a reference to an object that describes the pod that will be created if
// insufficient replicas are detected. This reference is ignored if a Template is set.
// Must be set before converting to a v1beta3 API object
TemplateRef *ObjectReference `json:"templateRef,omitempty"`
// Template is the object that describes the pod that will be created if
// insufficient replicas are detected. Internally, this takes precedence over a
// TemplateRef.
// Must be set before converting to a v1beta1 or v1beta2 API object.
Template *PodTemplateSpec `json:"template,omitempty"`
}
// ReplicationControllerStatus represents the current status of a replication
// controller.
type ReplicationControllerStatus struct {
// Replicas is the number of actual replicas.
Replicas int `json:"replicas"`
}
// ReplicationController represents the configuration of a replication controller.
type ReplicationController struct {
TypeMeta `json:",inline"`
ObjectMeta `json:"metadata,omitempty"`
// Spec defines the desired behavior of this replication controller.
Spec ReplicationControllerSpec `json:"spec,omitempty"`
// Status is the current status of this replication controller. This data may be
// out of date by some window of time.
Status ReplicationControllerStatus `json:"status,omitempty"`
}
// ReplicationControllerList is a collection of replication controllers.
type ReplicationControllerList struct {
TypeMeta `json:",inline"`
ListMeta `json:"metadata,omitempty"`
Items []ReplicationController `json:"items"`
}
// ServiceList holds a list of services.
type ServiceList struct {
TypeMeta `json:",inline"`
ListMeta `json:"metadata,omitempty"`
Items []Service `json:"items"`
}
// Session Affinity Type string
type AffinityType string
const (
// AffinityTypeClientIP is the Client IP based.
AffinityTypeClientIP AffinityType = "ClientIP"
// AffinityTypeNone - no session affinity.
AffinityTypeNone AffinityType = "None"
)
// ServiceStatus represents the current status of a service
type ServiceStatus struct{}
// ServiceSpec describes the attributes that a user creates on a service
type ServiceSpec struct {
// Port is the TCP or UDP port that will be made available to each pod for connecting to the pods
// proxied by this service.
Port int `json:"port"`
// Optional: Supports "TCP" and "UDP". Defaults to "TCP".
Protocol Protocol `json:"protocol,omitempty"`
// This service will route traffic to pods having labels matching this selector. If empty or not present,
// the service is assumed to have endpoints set by an external process and Kubernetes will not modify
// those endpoints.
Selector map[string]string `json:"selector"`
// PortalIP is usually assigned by the master. If specified by the user
// we will try to respect it or else fail the request. This field can
// not be changed by updates.
PortalIP string `json:"portalIP,omitempty"`
// ProxyPort is assigned by the master. If 0, the proxy will choose an ephemeral port.
// TODO: This is awkward - if we had a BoundService, it would be better factored.
ProxyPort int `json:"proxyPort,omitempty"`
// CreateExternalLoadBalancer indicates whether a load balancer should be created for this service.
CreateExternalLoadBalancer bool `json:"createExternalLoadBalancer,omitempty"`
// PublicIPs are used by external load balancers.
PublicIPs []string `json:"publicIPs,omitempty"`
// ContainerPort is the name of the port on the container to direct traffic to.
// Optional, if unspecified use the first port on the container.
ContainerPort util.IntOrString `json:"containerPort,omitempty"`
// Optional: Supports "ClientIP" and "None". Used to maintain session affinity.
SessionAffinity AffinityType `json:"sessionAffinity,omitempty"`
}
// Service is a named abstraction of software service (for example, mysql) consisting of local port
// (for example 3306) that the proxy listens on, and the selector that determines which pods
// will answer requests sent through the proxy.
type Service struct {
TypeMeta `json:",inline"`
ObjectMeta `json:"metadata,omitempty"`
// Spec defines the behavior of a service.
Spec ServiceSpec `json:"spec,omitempty"`
// Status represents the current status of a service.
Status ServiceStatus `json:"status,omitempty"`
}
// Endpoints is a collection of endpoints that implement the actual service, for example:
// Name: "mysql", Endpoints: ["10.10.1.1:1909", "10.10.2.2:8834"]
type Endpoints struct {
TypeMeta `json:",inline"`
ObjectMeta `json:"metadata,omitempty"`
Endpoints []string `json:"endpoints,omitempty"`
}
// EndpointsList is a list of endpoints.
type EndpointsList struct {
TypeMeta `json:",inline"`
ListMeta `json:"metadata,omitempty"`
Items []Endpoints `json:"items"`
}
// NodeSpec describes the attributes that a node is created with.
type NodeSpec struct {
// Capacity represents the available resources of a node
Capacity ResourceList `json:"capacity,omitempty"`
}
// NodeStatus is information about the current status of a node.
type NodeStatus struct {
// Queried from cloud provider, if available.
HostIP string `json:"hostIP,omitempty"`
// NodePhase is the current lifecycle phase of the node.
Phase NodePhase `json:"phase,omitempty"`
// Conditions is an array of current node conditions.
Conditions []NodeCondition `json:"conditions,omitempty"`
}
type NodePhase string
// These are the valid phases of node.
const (
// NodePending means the node has been created/added by the system, but not configured.
NodePending NodePhase = "Pending"
// NodeRunning means the node has been configured and has Kubernetes components running.
NodeRunning NodePhase = "Running"
// NodeTerminated means the node has been removed from the cluster.
NodeTerminated NodePhase = "Terminated"
)
type NodeConditionKind string
// These are valid conditions of node. Currently, we don't have enough information to decide
// node condition. In the future, we will add more. The proposed set of conditions are:
// NodeReachable, NodeLive, NodeReady, NodeSchedulable, NodeRunnable.
const (
// NodeReachable means the node can be reached (in the sense of HTTP connection) from node controller.
NodeReachable NodeConditionKind = "Reachable"
// NodeReady means the node returns StatusOK for HTTP health check.
NodeReady NodeConditionKind = "Ready"
)
type NodeConditionStatus string
// These are valid condition status. "ConditionFull" means node is in the condition;
// "ConditionNone" means node is not in the condition; "ConditionUnknown" means kubernetes
// can't decide if node is in the condition or not. In the future, we could add other
// intermediate conditions, e.g. ConditionDegraded.
const (
ConditionFull NodeConditionStatus = "Full"
ConditionNone NodeConditionStatus = "None"
ConditionUnknown NodeConditionStatus = "Unknown"
)
type NodeCondition struct {
Kind NodeConditionKind `json:"kind"`
Status NodeConditionStatus `json:"status"`
LastTransitionTime util.Time `json:"lastTransitionTime,omitempty"`
Reason string `json:"reason,omitempty"`
Message string `json:"message,omitempty"`
}
// NodeResources is an object for conveying resource information about a node.
// see https://github.com/GoogleCloudPlatform/kubernetes/blob/master/docs/resources.md for more details.
// TODO: Use ResourceList instead?
type NodeResources struct {
// Capacity represents the available resources of a node
Capacity ResourceList `json:"capacity,omitempty"`
}
// ResourceName is the name identifying various resources in a ResourceList.
type ResourceName string
const (
// CPU, in cores. (500m = .5 cores)
ResourceCPU ResourceName = "cpu"
// Memory, in bytes. (500Gi = 500GiB = 500 * 1024 * 1024 * 1024)
ResourceMemory ResourceName = "memory"
)
// ResourceList is a set of (resource name, quantity) pairs.
type ResourceList map[ResourceName]resource.Quantity
// Get is a convenience function, which returns a 0 quantity if the
// resource list is nil, empty, or lacks a value for the requested resource.
// Treat as read only!
func (rl ResourceList) Get(name ResourceName) *resource.Quantity {
if rl == nil {
return &resource.Quantity{}
}
q := rl[name]
return &q
}
// Node is a worker node in Kubernetenes
// The name of the node according to etcd is in ObjectMeta.Name.
type Node struct {
TypeMeta `json:",inline"`
ObjectMeta `json:"metadata,omitempty"`
// Spec defines the behavior of a node.
Spec NodeSpec `json:"spec,omitempty"`
// Status describes the current status of a Node
Status NodeStatus `json:"status,omitempty"`
}
// NodeList is a list of minions.
type NodeList struct {
TypeMeta `json:",inline"`
ListMeta `json:"metadata,omitempty"`
Items []Node `json:"items"`
}
// Binding is written by a scheduler to cause a pod to be bound to a host.
type Binding struct {
TypeMeta `json:",inline"`
ObjectMeta `json:"metadata,omitempty"`
PodID string `json:"podID"`
Host string `json:"host"`
}
// Status is a return value for calls that don't return other objects.
// TODO: this could go in apiserver, but I'm including it here so clients needn't
// import both.
type Status struct {
TypeMeta `json:",inline"`
ListMeta `json:"metadata,omitempty"`
// One of: "Success" or "Failure"
Status string `json:"status,omitempty"`
// A human-readable description of the status of this operation.
Message string `json:"message,omitempty"`
// A machine-readable description of why this operation is in the
// "Failure" status. If this value is empty there
// is no information available. A Reason clarifies an HTTP status
// code but does not override it.
Reason StatusReason `json:"reason,omitempty"`
// Extended data associated with the reason. Each reason may define its
// own extended details. This field is optional and the data returned
// is not guaranteed to conform to any schema except that defined by
// the reason type.
Details *StatusDetails `json:"details,omitempty"`
// Suggested HTTP return code for this status, 0 if not set.
Code int `json:"code,omitempty"`
}
// StatusDetails is a set of additional properties that MAY be set by the
// server to provide additional information about a response. The Reason
// field of a Status object defines what attributes will be set. Clients
// must ignore fields that do not match the defined type of each attribute,
// and should assume that any attribute may be empty, invalid, or under
// defined.
type StatusDetails struct {
// The ID attribute of the resource associated with the status StatusReason
// (when there is a single ID which can be described).
// TODO: replace with Name with v1beta3
ID string `json:"id,omitempty"`
// The kind attribute of the resource associated with the status StatusReason.
// On some operations may differ from the requested resource Kind.
Kind string `json:"kind,omitempty"`
// The Causes array includes more details associated with the StatusReason
// failure. Not all StatusReasons may provide detailed causes.
Causes []StatusCause `json:"causes,omitempty"`
}
// Values of Status.Status
const (
StatusSuccess = "Success"
StatusFailure = "Failure"
)
// StatusReason is an enumeration of possible failure causes. Each StatusReason
// must map to a single HTTP status code, but multiple reasons may map
// to the same HTTP status code.
// TODO: move to apiserver
type StatusReason string
const (
// StatusReasonUnknown means the server has declined to indicate a specific reason.
// The details field may contain other information about this error.
// Status code 500.
StatusReasonUnknown StatusReason = ""
// StatusReasonForbidden means the server can be reached and understood the request, but refuses
// to take any further action. It is the result of the server being configured to deny access for some reason
// to the requested resource by the client.
// Details (optional):
// "kind" string - the kind attribute of the forbidden resource
// on some operations may differ from the requested
// resource.
// "id" string - the identifier of the forbidden resource
// Status code 403
StatusReasonForbidden StatusReason = "Forbidden"
// StatusReasonNotFound means one or more resources required for this operation
// could not be found.
// Details (optional):
// "kind" string - the kind attribute of the missing resource
// on some operations may differ from the requested
// resource.
// "id" string - the identifier of the missing resource
// Status code 404
StatusReasonNotFound StatusReason = "NotFound"
// StatusReasonAlreadyExists means the resource you are creating already exists.
// Details (optional):
// "kind" string - the kind attribute of the conflicting resource
// "id" string - the identifier of the conflicting resource
// Status code 409
StatusReasonAlreadyExists StatusReason = "AlreadyExists"
// StatusReasonConflict means the requested update operation cannot be completed
// due to a conflict in the operation. The client may need to alter the request.
// Each resource may define custom details that indicate the nature of the
// conflict.
// Status code 409
StatusReasonConflict StatusReason = "Conflict"
// StatusReasonInvalid means the requested create or update operation cannot be
// completed due to invalid data provided as part of the request. The client may
// need to alter the request. When set, the client may use the StatusDetails
// message field as a summary of the issues encountered.
// Details (optional):
// "kind" string - the kind attribute of the invalid resource
// "id" string - the identifier of the invalid resource
// "causes" - one or more StatusCause entries indicating the data in the
// provided resource that was invalid. The code, message, and
// field attributes will be set.
// Status code 422
StatusReasonInvalid StatusReason = "Invalid"
// StatusReasonTryAgainLater means the server can be reached and understood the request,
// but cannot complete the action in a reasonable time. The client should retry the request.
// This is may be due to temporary server load or a transient communication issue with
// another server. Status code 500 is used because the HTTP spec provides no suitable
// server-requested client retry and the 5xx class represents actionable errors.
// Details (optional):
// "kind" string - the kind attribute of the resource being acted on.
// "id" string - the operation that is being attempted.
// Status code 500
StatusReasonTryAgainLater StatusReason = "TryAgainLater"
// StatusReasonTimeout means that the request could not be completed within the given time.
// Clients can get this response only when they specified a timeout param in the request.
// The request might succeed with an increased value of timeout param.
// Status code 504
StatusReasonTimeout StatusReason = "Timeout"
// StatusReasonBadRequest means that the request itself was invalid, because the request
// doesn't make any sense, for example deleting a read-only object. This is different than
// StatusReasonInvalid above which indicates that the API call could possibly succeed, but the
// data was invalid. API calls that return BadRequest can never succeed.
StatusReasonBadRequest StatusReason = "BadRequest"
// StatusReasonMethodNotAllowed means that the action the client attempted to perform on the
// resource was not supported by the code - for instance, attempting to delete a resource that
// can only be created. API calls that return MethodNotAllowed can never succeed.
StatusReasonMethodNotAllowed StatusReason = "MethodNotAllowed"
// StatusReasonInternalError indicates that an internal error occurred, it is unexpected
// and the outcome of the call is unknown.
// Details (optional):
// "causes" - The original error
// Status code 500
StatusReasonInternalError = "InternalError"
)
// StatusCause provides more information about an api.Status failure, including
// cases when multiple errors are encountered.
type StatusCause struct {
// A machine-readable description of the cause of the error. If this value is
// empty there is no information available.
Type CauseType `json:"reason,omitempty"`
// A human-readable description of the cause of the error. This field may be
// presented as-is to a reader.
Message string `json:"message,omitempty"`
// The field of the resource that has caused this error, as named by its JSON