mirror of https://github.com/tailscale/tailscale/
Merge pull request #967 from Xe/report-status-systemd
ipn/ipnserver: enable systemd-notify supportbradfitz/acl_tags_in_tailscale_status
Christine Dodrill
4 years ago
committed by
GitHub
commit
0681c6da49
@ -0,0 +1,14 @@
|
||||
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
/*
|
||||
Package systemd contains a minimal wrapper around systemd-notify to enable
|
||||
applications to signal readiness and status to systemd.
|
||||
|
||||
This package will only have effect on Linux systems running Tailscale in a
|
||||
systemd unit with the Type=notify flag set. On other operating systems (or
|
||||
when running in a Linux distro without being run from inside systemd) this
|
||||
package will become a no-op.
|
||||
*/
|
||||
package systemd
|
||||
@ -0,0 +1,75 @@
|
||||
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build linux
|
||||
|
||||
package systemd
|
||||
|
||||
import (
|
||||
"log"
|
||||
"sync"
|
||||
|
||||
"github.com/mdlayher/sdnotify"
|
||||
)
|
||||
|
||||
var getNotifyOnce struct {
|
||||
sync.Once
|
||||
v *sdnotify.Notifier
|
||||
}
|
||||
|
||||
type logOnce struct {
|
||||
sync.Once
|
||||
}
|
||||
|
||||
func (l *logOnce) logf(format string, args ...interface{}) {
|
||||
l.Once.Do(func() {
|
||||
log.Printf(format, args...)
|
||||
})
|
||||
}
|
||||
|
||||
var (
|
||||
readyOnce = &logOnce{}
|
||||
statusOnce = &logOnce{}
|
||||
)
|
||||
|
||||
func notifier() *sdnotify.Notifier {
|
||||
getNotifyOnce.Do(func() {
|
||||
var err error
|
||||
getNotifyOnce.v, err = sdnotify.New()
|
||||
if err != nil {
|
||||
log.Printf("systemd: systemd-notifier error: %v", err)
|
||||
}
|
||||
})
|
||||
return getNotifyOnce.v
|
||||
}
|
||||
|
||||
// Ready signals readiness to systemd. This will unblock service dependents from starting.
|
||||
func Ready() {
|
||||
err := notifier().Notify(sdnotify.Ready)
|
||||
if err != nil {
|
||||
readyOnce.logf("systemd: error notifying: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
// Status sends a single line status update to systemd so that information shows up
|
||||
// in systemctl output. For example:
|
||||
//
|
||||
// $ systemctl status tailscale
|
||||
// ● tailscale.service - Tailscale client daemon
|
||||
// Loaded: loaded (/nix/store/qc312qcy907wz80fqrgbbm8a9djafmlg-unit-tailscale.service/tailscale.service; enabled; vendor preset: enabled)
|
||||
// Active: active (running) since Tue 2020-11-24 17:54:07 EST; 13h ago
|
||||
// Main PID: 26741 (.tailscaled-wra)
|
||||
// Status: "Connected; user@host.domain.tld; 100.101.102.103"
|
||||
// IP: 0B in, 0B out
|
||||
// Tasks: 22 (limit: 4915)
|
||||
// Memory: 30.9M
|
||||
// CPU: 2min 38.469s
|
||||
// CGroup: /system.slice/tailscale.service
|
||||
// └─26741 /nix/store/sv6cj4mw2jajm9xkbwj07k29dj30lh0n-tailscale-date.20200727/bin/tailscaled --port 41641
|
||||
func Status(format string, args ...interface{}) {
|
||||
err := notifier().Notify(sdnotify.Statusf(format, args...))
|
||||
if err != nil {
|
||||
statusOnce.logf("systemd: error notifying: %v", err)
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,10 @@
|
||||
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build !linux
|
||||
|
||||
package systemd
|
||||
|
||||
func Ready() {}
|
||||
func Status(string, ...interface{}) {}
|
||||
Loading…
Reference in New Issue