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Add ExternalName to ServiceSpec

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ExternalName allows kubedns to return CNAME records for external
services. No proxying is involved.

See original issue at
https://github.com/kubernetes/kubernetes/issues/13748

Feature tracking at
https://github.com/kubernetes/features/issues/33
This commit is contained in:
Rudi Chiarito
2016-08-19 09:09:14 -07:00
parent b6d4462f01
commit 88fdb96bfb
15 changed files with 23107 additions and 22831 deletions
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48
pkg/api/types.go
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@@ -1761,6 +1761,11 @@ const (
// external load balancer (if the cloud provider supports it), in addition
// to 'NodePort' type.
ServiceTypeLoadBalancer ServiceType = "LoadBalancer"
// ServiceTypeExternalName means a service consists of only a reference to
// an external name that kubedns or equivalent will return as a CNAME
// record, with no exposing or proxying of any pods involved.
ServiceTypeExternalName ServiceType = "ExternalName"
)
// ServiceStatus represents the current status of a service
@@ -1791,24 +1796,49 @@ type LoadBalancerIngress struct {
// ServiceSpec describes the attributes that a user creates on a service
type ServiceSpec struct {
// Type determines how the service will be exposed. Valid options: ClusterIP, NodePort, LoadBalancer
// Type determines how the Service is exposed. Defaults to ClusterIP. Valid
// options are ExternalName, ClusterIP, NodePort, and LoadBalancer.
// "ExternalName" maps to the specified externalName.
// "ClusterIP" allocates a cluster-internal IP address for load-balancing to
// endpoints. Endpoints are determined by the selector or if that is not
// specified, by manual construction of an Endpoints object. If clusterIP is
// "None", no virtual IP is allocated and the endpoints are published as a
// set of endpoints rather than a stable IP.
// "NodePort" builds on ClusterIP and allocates a port on every node which
// routes to the clusterIP.
// "LoadBalancer" builds on NodePort and creates an
// external load-balancer (if supported in the current cloud) which routes
// to the clusterIP.
// More info: http://releases.k8s.io/HEAD/docs/user-guide/services.md#overview
Type ServiceType `json:"type,omitempty"`
// Required: The list of ports that are exposed by this service.
Ports []ServicePort `json:"ports"`
// 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.
// Route service traffic to pods with label keys and values matching this
// selector. If empty or not present, the service is assumed to have an
// external process managing its endpoints, which Kubernetes will not
// modify. Only applies to types ClusterIP, NodePort, and LoadBalancer.
// Ignored if type is ExternalName.
// More info: http://releases.k8s.io/HEAD/docs/user-guide/services.md#overview
Selector map[string]string `json:"selector"`
// ClusterIP 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.
// Valid values are None, empty string (""), or a valid IP address
// None can be specified for headless services when proxying is not required
// ClusterIP is the IP address of the service and is usually assigned
// randomly by the master. If an address is specified manually and is not in
// use by others, it will be allocated to the service; otherwise, creation
// of the service will fail. This field can not be changed through updates.
// Valid values are "None", empty string (""), or a valid IP address. "None"
// can be specified for headless services when proxying is not required.
// Only applies to types ClusterIP, NodePort, and LoadBalancer. Ignored if
// type is ExternalName.
// More info: http://releases.k8s.io/HEAD/docs/user-guide/services.md#virtual-ips-and-service-proxies
ClusterIP string `json:"clusterIP,omitempty"`
// ExternalName is the external reference that kubedns or equivalent will
// return as a CNAME record for this service. No proxying will be involved.
// Must be a valid DNS name and requires Type to be ExternalName.
ExternalName string
// ExternalIPs are used by external load balancers, or can be set by
// users to handle external traffic that arrives at a node.
ExternalIPs []string `json:"externalIPs,omitempty"`