Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
func NewCachedEndpointsAccessorAndStore ¶ added in v1.3.0
func NewCachedEndpointsAccessorAndStore() (client.EndpointsNamespacer, cache.Store)
func NewServerDefaults ¶
NewServerDefaults returns the default SkyDNS server configuration for a DNS server.
Types ¶
type Server ¶ added in v1.3.0
type Server struct {
Config *server.Config
Services ServiceAccessor
Endpoints client.EndpointsNamespacer
MetricsName string
Stop chan struct{}
}
func (*Server) ListenAndServe ¶ added in v1.3.0
ListenAndServe starts a DNS server that exposes services and values stored in etcd (if etcdclient is not nil). It will block until the server exits.
type ServiceAccessor ¶
type ServiceAccessor interface {
client.ServicesNamespacer
ServiceByClusterIP(ip string) (*api.Service, error)
}
ServiceAccessor is the interface used by the ServiceResolver to access services.
func NewCachedServiceAccessor ¶
func NewCachedServiceAccessor(client cache.Getter, stopCh <-chan struct{}) ServiceAccessor
NewCachedServiceAccessor returns a service accessor that can answer queries about services. It uses a backing cache to make ClusterIP lookups efficient.
func NewCachedServiceAccessorAndStore ¶ added in v1.3.0
func NewCachedServiceAccessorAndStore() (ServiceAccessor, cache.Store)
type ServiceResolver ¶
type ServiceResolver struct {
// contains filtered or unexported fields
}
ServiceResolver is a SkyDNS backend that will serve lookups for DNS entries based on Kubernetes service entries. The default DNS name for each service will be `<name>.<namespace>.<base>` where base can be an arbitrary depth DNS suffix. Queries not recognized within this base will return an error.
func NewServiceResolver ¶
func NewServiceResolver(config *server.Config, accessor ServiceAccessor, endpoints kclient.EndpointsNamespacer, fn FallbackFunc) *ServiceResolver
NewServiceResolver creates an object that will return DNS record entries for SkyDNS based on service names.
func (*ServiceResolver) Records ¶
Records implements the SkyDNS Backend interface and returns standard records for a name.
The standard pattern is <prefix>.<service_name>.<namespace>.(svc|endpoints|pod).<base>
* prefix may be any series of prefix values
- _endpoints is a special prefix that returns the same as <service_name>.<namespace>.svc.<base>
* service_name and namespace must locate a real service
- unless a fallback is defined, in which case the fallback name will be looked up
* svc indicates standard service rules apply (clusterIP or endpoints as A records)
- reverse lookup of IP is only possible for clusterIP
- SRV records are returned for each host+port combination as: _<port_name>._<port_protocol>.<dns> _<port_name>.<endpoint_id>.<dns>
* endpoints always returns each individual endpoint as A records
- SRV records for endpoints are similar to SVC, but are prefixed with a single label that is a hash of the endpoint IP
* pods is of the form <IP_with_dashes>.<namespace>.pod.<base> and resolves to <IP>
func (*ServiceResolver) ReverseRecord ¶
func (b *ServiceResolver) ReverseRecord(name string) (*msg.Service, error)
ReverseRecord implements the SkyDNS Backend interface and returns standard records for a name.
Source Files