216 lines
10 KiB
Go
216 lines
10 KiB
Go
/*
|
|
Copyright 2014 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 cloudprovider
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"strings"
|
|
|
|
"k8s.io/api/core/v1"
|
|
"k8s.io/apimachinery/pkg/types"
|
|
"k8s.io/client-go/informers"
|
|
"k8s.io/kubernetes/pkg/controller"
|
|
)
|
|
|
|
// Interface is an abstract, pluggable interface for cloud providers.
|
|
type Interface interface {
|
|
// Initialize provides the cloud with a kubernetes client builder and may spawn goroutines
|
|
// to perform housekeeping activities within the cloud provider.
|
|
Initialize(clientBuilder controller.ControllerClientBuilder)
|
|
// LoadBalancer returns a balancer interface. Also returns true if the interface is supported, false otherwise.
|
|
LoadBalancer() (LoadBalancer, bool)
|
|
// Instances returns an instances interface. Also returns true if the interface is supported, false otherwise.
|
|
Instances() (Instances, bool)
|
|
// Zones returns a zones interface. Also returns true if the interface is supported, false otherwise.
|
|
Zones() (Zones, bool)
|
|
// Clusters returns a clusters interface. Also returns true if the interface is supported, false otherwise.
|
|
Clusters() (Clusters, bool)
|
|
// Routes returns a routes interface along with whether the interface is supported.
|
|
Routes() (Routes, bool)
|
|
// ProviderName returns the cloud provider ID.
|
|
ProviderName() string
|
|
// ScrubDNS provides an opportunity for cloud-provider-specific code to process DNS settings for pods.
|
|
ScrubDNS(nameservers, searches []string) (nsOut, srchOut []string)
|
|
// HasClusterID returns true if a ClusterID is required and set
|
|
HasClusterID() bool
|
|
}
|
|
|
|
type InformerUser interface {
|
|
// SetInformers sets the informer on the cloud object.
|
|
SetInformers(informerFactory informers.SharedInformerFactory)
|
|
}
|
|
|
|
// Clusters is an abstract, pluggable interface for clusters of containers.
|
|
type Clusters interface {
|
|
// ListClusters lists the names of the available clusters.
|
|
ListClusters() ([]string, error)
|
|
// Master gets back the address (either DNS name or IP address) of the master node for the cluster.
|
|
Master(clusterName string) (string, error)
|
|
}
|
|
|
|
// TODO(#6812): Use a shorter name that's less likely to be longer than cloud
|
|
// providers' name length limits.
|
|
func GetLoadBalancerName(service *v1.Service) string {
|
|
//GCE requires that the name of a load balancer starts with a lower case letter.
|
|
ret := "a" + string(service.UID)
|
|
ret = strings.Replace(ret, "-", "", -1)
|
|
//AWS requires that the name of a load balancer is shorter than 32 bytes.
|
|
if len(ret) > 32 {
|
|
ret = ret[:32]
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// GetInstanceProviderID builds a ProviderID for a node in a cloud.
|
|
func GetInstanceProviderID(cloud Interface, nodeName types.NodeName) (string, error) {
|
|
instances, ok := cloud.Instances()
|
|
if !ok {
|
|
return "", fmt.Errorf("failed to get instances from cloud provider")
|
|
}
|
|
instanceID, err := instances.InstanceID(nodeName)
|
|
if err != nil {
|
|
return "", fmt.Errorf("failed to get instance ID from cloud provider: %v", err)
|
|
}
|
|
return cloud.ProviderName() + "://" + instanceID, nil
|
|
}
|
|
|
|
// LoadBalancer is an abstract, pluggable interface for load balancers.
|
|
type LoadBalancer interface {
|
|
// TODO: Break this up into different interfaces (LB, etc) when we have more than one type of service
|
|
// GetLoadBalancer returns whether the specified load balancer exists, and
|
|
// if so, what its status is.
|
|
// Implementations must treat the *v1.Service parameter as read-only and not modify it.
|
|
// Parameter 'clusterName' is the name of the cluster as presented to kube-controller-manager
|
|
GetLoadBalancer(clusterName string, service *v1.Service) (status *v1.LoadBalancerStatus, exists bool, err error)
|
|
// EnsureLoadBalancer creates a new load balancer 'name', or updates the existing one. Returns the status of the balancer
|
|
// Implementations must treat the *v1.Service and *v1.Node
|
|
// parameters as read-only and not modify them.
|
|
// Parameter 'clusterName' is the name of the cluster as presented to kube-controller-manager
|
|
EnsureLoadBalancer(clusterName string, service *v1.Service, nodes []*v1.Node) (*v1.LoadBalancerStatus, error)
|
|
// UpdateLoadBalancer updates hosts under the specified load balancer.
|
|
// Implementations must treat the *v1.Service and *v1.Node
|
|
// parameters as read-only and not modify them.
|
|
// Parameter 'clusterName' is the name of the cluster as presented to kube-controller-manager
|
|
UpdateLoadBalancer(clusterName string, service *v1.Service, nodes []*v1.Node) error
|
|
// EnsureLoadBalancerDeleted deletes the specified load balancer if it
|
|
// exists, returning nil if the load balancer specified either didn't exist or
|
|
// was successfully deleted.
|
|
// This construction is useful because many cloud providers' load balancers
|
|
// have multiple underlying components, meaning a Get could say that the LB
|
|
// doesn't exist even if some part of it is still laying around.
|
|
// Implementations must treat the *v1.Service parameter as read-only and not modify it.
|
|
// Parameter 'clusterName' is the name of the cluster as presented to kube-controller-manager
|
|
EnsureLoadBalancerDeleted(clusterName string, service *v1.Service) error
|
|
}
|
|
|
|
// Instances is an abstract, pluggable interface for sets of instances.
|
|
type Instances interface {
|
|
// NodeAddresses returns the addresses of the specified instance.
|
|
// TODO(roberthbailey): This currently is only used in such a way that it
|
|
// returns the address of the calling instance. We should do a rename to
|
|
// make this clearer.
|
|
NodeAddresses(name types.NodeName) ([]v1.NodeAddress, error)
|
|
// NodeAddressesByProviderID returns the addresses of the specified instance.
|
|
// The instance is specified using the providerID of the node. The
|
|
// ProviderID is a unique identifier of the node. This will not be called
|
|
// from the node whose nodeaddresses are being queried. i.e. local metadata
|
|
// services cannot be used in this method to obtain nodeaddresses
|
|
NodeAddressesByProviderID(providerID string) ([]v1.NodeAddress, error)
|
|
// ExternalID returns the cloud provider ID of the node with the specified NodeName.
|
|
// Note that if the instance does not exist or is no longer running, we must return ("", cloudprovider.InstanceNotFound)
|
|
ExternalID(nodeName types.NodeName) (string, error)
|
|
// InstanceID returns the cloud provider ID of the node with the specified NodeName.
|
|
InstanceID(nodeName types.NodeName) (string, error)
|
|
// InstanceType returns the type of the specified instance.
|
|
InstanceType(name types.NodeName) (string, error)
|
|
// InstanceTypeByProviderID returns the type of the specified instance.
|
|
InstanceTypeByProviderID(providerID string) (string, error)
|
|
// AddSSHKeyToAllInstances adds an SSH public key as a legal identity for all instances
|
|
// expected format for the key is standard ssh-keygen format: <protocol> <blob>
|
|
AddSSHKeyToAllInstances(user string, keyData []byte) error
|
|
// CurrentNodeName returns the name of the node we are currently running on
|
|
// On most clouds (e.g. GCE) this is the hostname, so we provide the hostname
|
|
CurrentNodeName(hostname string) (types.NodeName, error)
|
|
// InstanceExistsByProviderID returns true if the instance for the given provider id still is running.
|
|
// If false is returned with no error, the instance will be immediately deleted by the cloud controller manager.
|
|
InstanceExistsByProviderID(providerID string) (bool, error)
|
|
}
|
|
|
|
// Route is a representation of an advanced routing rule.
|
|
type Route struct {
|
|
// Name is the name of the routing rule in the cloud-provider.
|
|
// It will be ignored in a Create (although nameHint may influence it)
|
|
Name string
|
|
// TargetNode is the NodeName of the target instance.
|
|
TargetNode types.NodeName
|
|
// DestinationCIDR is the CIDR format IP range that this routing rule
|
|
// applies to.
|
|
DestinationCIDR string
|
|
// Blackhole is set to true if this is a blackhole route
|
|
// The node controller will delete the route if it is in the managed range.
|
|
Blackhole bool
|
|
}
|
|
|
|
// Routes is an abstract, pluggable interface for advanced routing rules.
|
|
type Routes interface {
|
|
// ListRoutes lists all managed routes that belong to the specified clusterName
|
|
ListRoutes(clusterName string) ([]*Route, error)
|
|
// CreateRoute creates the described managed route
|
|
// route.Name will be ignored, although the cloud-provider may use nameHint
|
|
// to create a more user-meaningful name.
|
|
CreateRoute(clusterName string, nameHint string, route *Route) error
|
|
// DeleteRoute deletes the specified managed route
|
|
// Route should be as returned by ListRoutes
|
|
DeleteRoute(clusterName string, route *Route) error
|
|
}
|
|
|
|
var (
|
|
InstanceNotFound = errors.New("instance not found")
|
|
DiskNotFound = errors.New("disk is not found")
|
|
NotImplemented = errors.New("unimplemented")
|
|
)
|
|
|
|
// Zone represents the location of a particular machine.
|
|
type Zone struct {
|
|
FailureDomain string
|
|
Region string
|
|
}
|
|
|
|
// Zones is an abstract, pluggable interface for zone enumeration.
|
|
type Zones interface {
|
|
// GetZone returns the Zone containing the current failure zone and locality region that the program is running in
|
|
// In most cases, this method is called from the kubelet querying a local metadata service to aquire its zone.
|
|
// For the case of external cloud providers, use GetZoneByProviderID or GetZoneByNodeName since GetZone
|
|
// can no longer be called from the kubelets.
|
|
GetZone() (Zone, error)
|
|
|
|
// GetZoneByProviderID returns the Zone containing the current zone and locality region of the node specified by providerId
|
|
// This method is particularly used in the context of external cloud providers where node initialization must be down
|
|
// outside the kubelets.
|
|
GetZoneByProviderID(providerID string) (Zone, error)
|
|
|
|
// GetZoneByNodeName returns the Zone containing the current zone and locality region of the node specified by node name
|
|
// This method is particularly used in the context of external cloud providers where node initialization must be down
|
|
// outside the kubelets.
|
|
GetZoneByNodeName(nodeName types.NodeName) (Zone, error)
|
|
}
|
|
|
|
// PVLabeler is an abstract, pluggable interface for fetching labels for volumes
|
|
type PVLabeler interface {
|
|
GetLabelsForVolume(pv *v1.PersistentVolume) (map[string]string, error)
|
|
}
|