428b8a4132
IPAM controller unifies handling of node pod CIDR range allocation. It is intended to supersede the logic that is currently in range_allocator and cloud_cidr_allocator. Note: for this change, the other allocators still exist and are the default. It supports two modes: * CIDR range allocations done within the cluster that are then propagated out to the cloud provider. * Cloud provider managed IPAM that is then reflected into the cluster.
126 lines
3.6 KiB
Go
126 lines
3.6 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package ipam
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import (
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"context"
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"encoding/json"
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"net"
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"github.com/golang/glog"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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clientset "k8s.io/client-go/kubernetes"
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v1core "k8s.io/client-go/kubernetes/typed/core/v1"
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"k8s.io/client-go/tools/record"
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"k8s.io/kubernetes/pkg/cloudprovider/providers/gce"
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nodeutil "k8s.io/kubernetes/pkg/util/node"
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"k8s.io/metrics/pkg/client/clientset_generated/clientset/scheme"
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)
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type adapter struct {
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k8s clientset.Interface
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cloud *gce.GCECloud
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recorder record.EventRecorder
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}
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func newAdapter(k8s clientset.Interface, cloud *gce.GCECloud) *adapter {
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ret := &adapter{
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k8s: k8s,
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cloud: cloud,
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}
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broadcaster := record.NewBroadcaster()
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broadcaster.StartLogging(glog.Infof)
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ret.recorder = broadcaster.NewRecorder(scheme.Scheme, v1.EventSource{Component: "cloudCIDRAllocator"})
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glog.V(0).Infof("Sending events to api server.")
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broadcaster.StartRecordingToSink(&v1core.EventSinkImpl{
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Interface: v1core.New(k8s.Core().RESTClient()).Events(""),
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})
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return ret
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}
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func (a *adapter) Alias(ctx context.Context, nodeName string) (*net.IPNet, error) {
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cidrs, err := a.cloud.AliasRanges(types.NodeName(nodeName))
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if err != nil {
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return nil, err
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}
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switch len(cidrs) {
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case 0:
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return nil, nil
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case 1:
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break
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default:
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glog.Warningf("Node %q has more than one alias assigned (%v), defaulting to the first", nodeName, cidrs)
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}
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_, cidrRange, err := net.ParseCIDR(cidrs[0])
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if err != nil {
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return nil, err
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}
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return cidrRange, nil
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}
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func (a *adapter) AddAlias(ctx context.Context, nodeName string, cidrRange *net.IPNet) error {
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return a.cloud.AddAliasToInstance(types.NodeName(nodeName), cidrRange)
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}
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func (a *adapter) Node(ctx context.Context, name string) (*v1.Node, error) {
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return a.k8s.Core().Nodes().Get(name, metav1.GetOptions{})
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}
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func (a *adapter) UpdateNodePodCIDR(ctx context.Context, node *v1.Node, cidrRange *net.IPNet) error {
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patch := map[string]interface{}{
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"apiVersion": node.APIVersion,
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"kind": node.Kind,
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"metadata": map[string]interface{}{"name": node.Name},
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"spec": map[string]interface{}{"podCIDR": cidrRange.String()},
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}
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bytes, err := json.Marshal(patch)
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if err != nil {
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return err
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}
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_, err = a.k8s.Core().Nodes().Patch(node.Name, types.StrategicMergePatchType, bytes)
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return err
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}
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func (a *adapter) UpdateNodeNetworkUnavailable(nodeName string, unavailable bool) error {
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condition := v1.ConditionFalse
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if unavailable {
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condition = v1.ConditionTrue
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}
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return nodeutil.SetNodeCondition(a.k8s, types.NodeName(nodeName), v1.NodeCondition{
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Type: v1.NodeNetworkUnavailable,
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Status: condition,
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Reason: "RouteCreated",
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Message: "NodeController created an implicit route",
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LastTransitionTime: metav1.Now(),
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})
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}
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func (a *adapter) EmitNodeWarningEvent(nodeName, reason, fmt string, args ...interface{}) {
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ref := &v1.ObjectReference{Kind: "Node", Name: nodeName}
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a.recorder.Eventf(ref, v1.EventTypeNormal, reason, fmt, args...)
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}
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