| // Copyright 2021 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package provisioner |
| |
| import ( |
| "io/ioutil" |
| "log" |
| "os" |
| "os/exec" |
| "path/filepath" |
| |
| "github.com/GoogleCloudPlatform/cos-customizer/src/pkg/utils" |
| ) |
| |
| type systemdClient struct { |
| systemctl string |
| } |
| |
| func (sc *systemdClient) isActive(unit string) bool { |
| return exec.Command(sc.systemctl, "is-active", unit).Run() == nil |
| } |
| |
| func (sc *systemdClient) reload() error { |
| return utils.RunCommand([]string{sc.systemctl, "daemon-reload"}, "", nil) |
| } |
| |
| func (sc *systemdClient) start(unit string, flags []string) error { |
| return utils.RunCommand(append([]string{sc.systemctl, "start", unit}, flags...), "", nil) |
| } |
| |
| func (sc *systemdClient) stop(unit string) error { |
| if sc.isActive(unit) { |
| log.Printf("%q is active, stopping...", unit) |
| if err := utils.RunCommand([]string{sc.systemctl, "stop", unit}, "", nil); err != nil { |
| return err |
| } |
| log.Printf("%q stopped", unit) |
| } else { |
| log.Printf("%q is not active, ignoring", unit) |
| } |
| return nil |
| } |
| |
| func (sc *systemdClient) stopJournald(rootDir string) error { |
| configDirName := filepath.Join(rootDir, "etc/systemd/system/systemd-journald.service.d") |
| configName := filepath.Join(configDirName, "override.conf") |
| configData := `[Service] |
| Restart=no |
| ` |
| if err := os.MkdirAll(configDirName, 0755); err != nil { |
| return err |
| } |
| if err := ioutil.WriteFile(configName, []byte(configData), 0644); err != nil { |
| return err |
| } |
| if err := sc.reload(); err != nil { |
| return err |
| } |
| for _, u := range []string{ |
| "systemd-journald.socket", |
| "systemd-journald-dev-log.socket", |
| "systemd-journald-audit.socket", |
| "syslog.socket", |
| "systemd-journald.service", |
| } { |
| if err := sc.stop(u); err != nil { |
| return err |
| } |
| } |
| return nil |
| } |