mirror of
https://github.com/kemko/nomad.git
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c3dcdb5413
Adds a new `windows` command which is available when running on a Windows hosts. The command includes two new subcommands: * `service install` * `service uninstall` The `service install` command will install the called binary into the Windows program files directory, create a new Windows service, setup configuration and data directories, and register the service with the Window eventlog. If the service and/or binary already exist, the service will be stopped, service and eventlog updated if needed, binary replaced, and the service started again. The `service uninstall` command will stop the service, remove the Windows service, and deregister the service with the eventlog. It will not remove the configuration/data directory nor will it remove the installed binary.
122 lines
3.1 KiB
Go
122 lines
3.1 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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package command
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import (
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"fmt"
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"strings"
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"github.com/hashicorp/nomad/helper/winsvc"
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"github.com/posener/complete"
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)
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type WindowsServiceUninstallCommand struct {
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Meta
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serviceManagerFn func() (winsvc.WindowsServiceManager, error)
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privilegedCheckFn func() bool
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}
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func (c *WindowsServiceUninstallCommand) AutoCompleteFlags() complete.Flags {
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return c.Meta.AutocompleteFlags(FlagSetDefault)
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}
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func (c *WindowsServiceUninstallCommand) Synopsis() string {
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return "Uninstall the nomad Windows system service"
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}
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func (c *WindowsServiceUninstallCommand) Name() string { return "windows service uninstall" }
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func (c *WindowsServiceUninstallCommand) Help() string {
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helpText := `
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Usage: nomad windows service uninstall [options]
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This command uninstalls nomad as a Windows system service.
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General Options:
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` + generalOptionsUsage(usageOptsDefault)
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return strings.TrimSpace(helpText)
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}
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func (c *WindowsServiceUninstallCommand) Run(args []string) int {
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flags := c.Meta.FlagSet(c.Name(), FlagSetDefault)
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flags.Usage = func() { c.Ui.Output(c.Help()) }
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if err := flags.Parse(args); err != nil {
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return 1
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}
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if args = flags.Args(); len(args) > 0 {
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c.Ui.Error("This command takes no arguments")
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c.Ui.Error(commandErrorText(c))
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return 1
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}
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// Set helper functions to default if unset
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if c.serviceManagerFn == nil {
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c.serviceManagerFn = winsvc.NewWindowsServiceManager
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}
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if c.privilegedCheckFn == nil {
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c.privilegedCheckFn = winsvc.IsPrivilegedProcess
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}
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// Check that command is being run with elevated permissions
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if !c.privilegedCheckFn() {
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c.Ui.Error("Service uninstall must be run with Administator privileges")
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return 1
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}
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c.Ui.Output("Uninstalling nomad Windows service...")
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m, err := c.serviceManagerFn()
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if err != nil {
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c.Ui.Error(fmt.Sprintf("Could not connect to Windows service manager - %s", err))
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return 1
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}
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defer m.Close()
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if err := c.performUninstall(m); err != nil {
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c.Ui.Error(fmt.Sprintf("Service uninstall failed: %s", err))
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return 1
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}
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c.Ui.Info("Successfully uninstalled nomad Windows service")
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return 0
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}
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func (c *WindowsServiceUninstallCommand) performUninstall(m winsvc.WindowsServiceManager) error {
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// Check that the nomad service is currently registered
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exists, err := m.IsServiceRegistered(winsvc.WINDOWS_SERVICE_NAME)
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if err != nil {
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return fmt.Errorf("unable to check for existing service - %w", err)
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}
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if !exists {
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return nil
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}
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// Grab the service and ensure the service is stopped
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srvc, err := m.GetService(winsvc.WINDOWS_SERVICE_NAME)
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if err != nil {
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return fmt.Errorf("could not get existing service - %w", err)
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}
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defer srvc.Close()
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if err := srvc.Stop(); err != nil {
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return fmt.Errorf("unable to stop service - %w", err)
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}
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// Remove the service from the event log
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if err := srvc.DisableEventlog(); err != nil {
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return fmt.Errorf("could not remove eventlog configuration - %w", err)
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}
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// Finally, delete the service
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if err := srvc.Delete(); err != nil {
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return fmt.Errorf("could not delete service - %w", err)
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}
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return nil
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}
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