func install(he vmextension.HandlerEnvironment, d driver.DistroDriver) error { // Install docker daemon log.Printf("++ install docker") if _, err := exec.LookPath("docker"); err == nil { log.Printf("docker already installed. not re-installing") } else { if err := d.InstallDocker(); err != nil { return err } } log.Printf("-- install docker") // Install docker-compose log.Printf("++ install docker-compose") if err := installCompose(d.DockerComposeDir()); err != nil { return fmt.Errorf("error installing docker-compose: %v", err) } log.Printf("-- install docker-compose") // Add user to 'docker' group to user docker as non-root u, err := util.GetAzureUser() if err != nil { return fmt.Errorf("failed to get provisioned user: %v", err) } log.Printf("++ add user to docker group") if out, err := executil.Exec("usermod", "-aG", "docker", u); err != nil { log.Printf("%s", string(out)) return err } log.Printf("-- add user to docker group") return nil }