mirror of https://github.com/kubernetes/kops.git
122 lines
3.4 KiB
Go
122 lines
3.4 KiB
Go
/*
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Copyright 2016 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 components
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import (
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"fmt"
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"github.com/blang/semver"
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"k8s.io/client-go/pkg/api/v1"
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"k8s.io/kops/pkg/apis/kops"
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"k8s.io/kops/upup/pkg/fi"
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"k8s.io/kops/upup/pkg/fi/loader"
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)
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// KubeAPIServerOptionsBuilder adds options for the apiserver to the model
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type KubeAPIServerOptionsBuilder struct {
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Context *OptionsContext
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}
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var _ loader.OptionsBuilder = &KubeAPIServerOptionsBuilder{}
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func (b *KubeAPIServerOptionsBuilder) BuildOptions(o interface{}) error {
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clusterSpec := o.(*kops.ClusterSpec)
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if clusterSpec.KubeAPIServer == nil {
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clusterSpec.KubeAPIServer = &kops.KubeAPIServerConfig{}
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}
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// TODO: Set insecure-port=0 to turn it off
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if clusterSpec.KubeAPIServer.APIServerCount == nil {
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count := b.buildAPIServerCount(clusterSpec)
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if count == 0 {
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return fmt.Errorf("no instance groups found")
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}
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clusterSpec.KubeAPIServer.APIServerCount = fi.Int32(int32(count))
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}
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if clusterSpec.KubeAPIServer.StorageBackend == nil {
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// For the moment, we continue to use etcd2
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clusterSpec.KubeAPIServer.StorageBackend = fi.String("etcd2")
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}
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k8sVersion, err := KubernetesVersion(clusterSpec)
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if err != nil {
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return err
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}
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if clusterSpec.KubeAPIServer.KubeletPreferredAddressTypes == nil {
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if k8sVersion.GTE(semver.MustParse("1.5.0")) {
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// Default precedence
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//options.KubeAPIServer.KubeletPreferredAddressTypes = []string {
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// string(api.NodeHostName),
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// string(api.NodeInternalIP),
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// string(api.NodeExternalIP),
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// string(api.NodeLegacyHostIP),
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//}
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// We prioritize the internal IP above the hostname
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clusterSpec.KubeAPIServer.KubeletPreferredAddressTypes = []string{
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string(v1.NodeInternalIP),
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string(v1.NodeHostName),
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string(v1.NodeExternalIP),
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string(v1.NodeLegacyHostIP),
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}
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}
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}
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if clusterSpec.Authorization != nil {
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if clusterSpec.Authorization.RBAC != nil {
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clusterSpec.KubeAPIServer.AuthorizationMode = fi.String("RBAC")
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}
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}
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return nil
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}
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func (b *KubeAPIServerOptionsBuilder) buildAPIServerCount(clusterSpec *kops.ClusterSpec) int {
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// The --apiserver-count flag is (generally agreed) to be something we need to get rid of in k8s
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// We should do something like this:
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//count := 0
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//for _, ig := range b.InstanceGroups {
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// if !ig.IsMaster() {
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// continue
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// }
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// size := fi.IntValue(ig.Spec.MaxSize)
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// if size == 0 {
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// size = fi.IntValue(ig.Spec.MinSize)
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// }
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// count += size
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//}
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// But if we do, we end up with a weird dependency on InstanceGroups. We actually could tolerate
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// that in kops, but we don't really want to.
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// So instead, we assume that the etcd cluster size is the API Server Count.
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// We can re-examine this when we allow separate etcd clusters - at which time hopefully
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// the flag won't exist
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counts := make(map[string]int)
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for _, etcdCluster := range clusterSpec.EtcdClusters {
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counts[etcdCluster.Name] = len(etcdCluster.Members)
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}
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count := counts["main"]
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return count
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}
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