mirror of https://github.com/kubernetes/kops.git
145 lines
3.3 KiB
Go
145 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 nodetasks
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import (
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"fmt"
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"os/exec"
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"strconv"
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"strings"
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"k8s.io/klog"
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"k8s.io/kops/upup/pkg/fi"
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"k8s.io/kops/upup/pkg/fi/nodeup/cloudinit"
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"k8s.io/kops/upup/pkg/fi/nodeup/local"
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)
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// UserTask is responsible for creating a user, by calling useradd
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type UserTask struct {
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Name string
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UID int `json:"uid"`
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Shell string `json:"shell"`
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Home string `json:"home"`
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}
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var _ fi.Task = &UserTask{}
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func (e *UserTask) String() string {
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return fmt.Sprintf("User: %s", e.Name)
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}
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var _ fi.HasName = &File{}
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func (f *UserTask) GetName() *string {
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return &f.Name
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}
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func (f *UserTask) SetName(name string) {
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klog.Fatalf("SetName not supported for User task")
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}
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func (e *UserTask) Find(c *fi.Context) (*UserTask, error) {
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info, err := fi.LookupUser(e.Name)
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if err != nil {
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return nil, err
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}
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if info == nil {
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return nil, nil
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}
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actual := &UserTask{
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Name: e.Name,
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UID: info.Uid,
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Shell: info.Shell,
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Home: info.Home,
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}
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return actual, nil
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}
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func (e *UserTask) Run(c *fi.Context) error {
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return fi.DefaultDeltaRunMethod(e, c)
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}
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func (_ *UserTask) CheckChanges(a, e, changes *UserTask) error {
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return nil
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}
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func buildUseraddArgs(e *UserTask) []string {
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var args []string
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if e.UID != 0 {
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args = append(args, "-u", strconv.Itoa(e.UID))
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}
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if e.Shell != "" {
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args = append(args, "-s", e.Shell)
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}
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if e.Home != "" {
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args = append(args, "-d", e.Home)
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}
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args = append(args, e.Name)
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return args
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}
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func (_ *UserTask) RenderLocal(t *local.LocalTarget, a, e, changes *UserTask) error {
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if a == nil {
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args := buildUseraddArgs(e)
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klog.Infof("Creating user %q", e.Name)
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cmd := exec.Command("useradd", args...)
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klog.V(2).Infof("running command: useradd %s", strings.Join(args, " "))
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output, err := cmd.CombinedOutput()
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if err != nil {
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return fmt.Errorf("error creating user: %v\nOutput: %s", err, output)
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}
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} else {
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var args []string
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if changes.UID != 0 {
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args = append(args, "-u", strconv.Itoa(e.UID))
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}
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if changes.Shell != "" {
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args = append(args, "-s", e.Shell)
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}
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if changes.Home != "" {
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args = append(args, "-d", e.Home)
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}
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if len(args) != 0 {
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args = append(args, e.Name)
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klog.Infof("Reconfiguring user %q", e.Name)
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cmd := exec.Command("usermod", args...)
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klog.V(2).Infof("running command: usermod %s", strings.Join(args, " "))
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output, err := cmd.CombinedOutput()
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if err != nil {
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return fmt.Errorf("error reconfiguring user: %v\nOutput: %s", err, output)
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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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func (_ *UserTask) RenderCloudInit(t *cloudinit.CloudInitTarget, a, e, changes *UserTask) error {
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args := buildUseraddArgs(e)
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cmd := []string{"useradd"}
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cmd = append(cmd, args...)
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klog.Infof("Creating user %q", e.Name)
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t.AddCommand(cloudinit.Once, cmd...)
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return nil
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}
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