mirror of https://github.com/kubernetes/kops.git
138 lines
3.3 KiB
Go
138 lines
3.3 KiB
Go
/*
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Copyright 2019 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 model
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import (
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"fmt"
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"k8s.io/kops/nodeup/pkg/distros"
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"k8s.io/kops/upup/pkg/fi"
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"k8s.io/kops/upup/pkg/fi/nodeup/nodetasks"
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"k8s.io/klog"
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)
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// KubectlBuilder install kubectl
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type KubectlBuilder struct {
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*NodeupModelContext
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}
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var _ fi.ModelBuilder = &KubectlBuilder{}
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// Build is responsible for managing the kubectl on the nodes
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func (b *KubectlBuilder) Build(c *fi.ModelBuilderContext) error {
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if !b.IsMaster {
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return nil
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}
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{
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// TODO: Extract to common function?
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assetName := "kubectl"
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assetPath := ""
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asset, err := b.Assets.Find(assetName, assetPath)
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if err != nil {
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return fmt.Errorf("error trying to locate asset %q: %v", assetName, err)
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}
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if asset == nil {
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return fmt.Errorf("unable to locate asset %q", assetName)
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}
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c.AddTask(&nodetasks.File{
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Path: b.KubectlPath() + "/" + assetName,
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Contents: asset,
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Type: nodetasks.FileType_File,
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Mode: s("0755"),
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})
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}
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{
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kubeconfig, err := b.BuildPKIKubeconfig("kubecfg")
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if err != nil {
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return err
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}
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c.AddTask(&nodetasks.File{
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Path: "/var/lib/kubectl/kubeconfig",
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Contents: fi.NewStringResource(kubeconfig),
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Type: nodetasks.FileType_File,
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Mode: s("0400"),
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})
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adminUser, adminGroup, err := b.findKubeconfigUser()
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if err != nil {
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return err
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}
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if adminUser != nil && adminUser.Home != "" {
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c.AddTask(&nodetasks.File{
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Path: adminUser.Home + "/.kube/",
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Type: nodetasks.FileType_Directory,
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Mode: s("0700"),
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Owner: s(adminUser.Name),
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Group: s(adminGroup.Name),
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})
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c.AddTask(&nodetasks.File{
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Path: adminUser.Home + "/.kube/config",
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Contents: fi.NewStringResource(kubeconfig),
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Type: nodetasks.FileType_File,
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Mode: s("0400"),
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Owner: s(adminUser.Name),
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Group: s(adminGroup.Name),
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})
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}
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}
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return nil
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}
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// findKubeconfigUser finds the default user for whom we should create a kubeconfig
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func (b *KubectlBuilder) findKubeconfigUser() (*fi.User, *fi.Group, error) {
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var users []string
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switch b.Distribution {
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case distros.DistributionJessie, distros.DistributionDebian9, distros.DistributionDebian10:
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users = []string{"admin", "root"}
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case distros.DistributionCentos7:
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users = []string{"centos"}
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default:
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klog.Warningf("Unknown distro; won't write kubeconfig to homedir %s", b.Distribution)
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return nil, nil, nil
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}
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for _, s := range users {
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user, err := fi.LookupUser(s)
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if err != nil {
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klog.Warningf("error looking up user %q: %v", s, err)
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continue
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}
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if user == nil {
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continue
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}
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group, err := fi.LookupGroupById(user.Gid)
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if err != nil {
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klog.Warningf("unable to find group %d for user %q", user.Gid, s)
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continue
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}
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if group == nil {
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continue
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}
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return user, group, nil
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}
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return nil, nil, nil
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}
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