mirror of https://github.com/k3s-io/k3s.git
110 lines
2.9 KiB
Go
110 lines
2.9 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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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 controller
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import (
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"fmt"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/registry/minion"
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"github.com/golang/glog"
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)
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type MinionController struct {
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cloud cloudprovider.Interface
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matchRE string
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staticResources *api.NodeResources
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registry minion.Registry
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}
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// NewMinionController returns a new minion controller to sync instances from cloudprovider.
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func NewMinionController(cloud cloudprovider.Interface, matchRE string, staticResources *api.NodeResources, registry minion.Registry) (*MinionController, error) {
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return &MinionController{
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cloud: cloud,
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matchRE: matchRE,
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staticResources: staticResources,
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registry: registry,
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}, nil
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}
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// Sync syncs list of instances from cloudprovider to master etcd registry.
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func (s *MinionController) Sync() error {
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matches, err := s.cloudMinions()
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if err != nil {
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return err
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}
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minions, err := s.registry.ListMinions(nil)
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if err != nil {
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return err
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}
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minionMap := make(map[string]*api.Minion)
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for _, minion := range minions.Items {
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minionMap[minion.ID] = &minion
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}
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// Create or delete minions from registry.
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for _, match := range matches.Items {
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if _, ok := minionMap[match.ID]; !ok {
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glog.Infof("Create minion in registry: %s", match.ID)
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err = s.registry.CreateMinion(nil, &match)
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if err != nil {
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return err
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}
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}
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delete(minionMap, match.ID)
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}
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for minionID := range minionMap {
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glog.Infof("Delete minion from registry: %s", minionID)
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err = s.registry.DeleteMinion(nil, minionID)
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if err != nil {
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return err
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}
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}
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return nil
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}
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// cloudMinions constructs and returns api.MinionList from cloudprovider.
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func (s *MinionController) cloudMinions() (*api.MinionList, error) {
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instances, ok := s.cloud.Instances()
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if !ok {
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return nil, fmt.Errorf("cloud doesn't support instances")
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}
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matches, err := instances.List(s.matchRE)
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if err != nil {
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return nil, err
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}
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result := &api.MinionList{
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Items: make([]api.Minion, len(matches)),
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}
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for i := range matches {
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result.Items[i].ID = matches[i]
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resources, err := instances.GetNodeResources(matches[i])
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if err != nil {
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return nil, err
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}
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if resources == nil {
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resources = s.staticResources
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}
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if resources != nil {
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result.Items[i].NodeResources = *resources
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}
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}
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return result, nil
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}
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