clientupdate: exec systemctl instead of using dbus to restart (#11923)

Shell out to "systemctl", which lets us drop an extra dependency.

Updates https://github.com/tailscale/corp/issues/18935

Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
pull/11749/merge
Andrew Lytvynov 5 months ago committed by GitHub
parent 6a0fbacc28
commit ce5c80d0fe
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194

@ -1019,6 +1019,20 @@ func (up *Updater) updateLinuxBinary() error {
return nil
}
func restartSystemdUnit(ctx context.Context) error {
if _, err := exec.LookPath("systemctl"); err != nil {
// Likely not a systemd-managed distro.
return errors.ErrUnsupported
}
if out, err := exec.Command("systemctl", "daemon-reload").CombinedOutput(); err != nil {
return fmt.Errorf("systemctl daemon-reload failed: %w\noutput: %s", err, out)
}
if out, err := exec.Command("systemctl", "restart", "tailscaled.service").CombinedOutput(); err != nil {
return fmt.Errorf("systemctl restart failed: %w\noutput: %s", err, out)
}
return nil
}
func (up *Updater) downloadLinuxTarball(ver string) (string, error) {
dlDir, err := os.UserCacheDir()
if err != nil {

@ -1,37 +0,0 @@
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package clientupdate
import (
"context"
"errors"
"fmt"
"github.com/coreos/go-systemd/v22/dbus"
)
func restartSystemdUnit(ctx context.Context) error {
c, err := dbus.NewWithContext(ctx)
if err != nil {
// Likely not a systemd-managed distro.
return errors.ErrUnsupported
}
defer c.Close()
if err := c.ReloadContext(ctx); err != nil {
return fmt.Errorf("failed to reload tailscaled.service: %w", err)
}
ch := make(chan string, 1)
if _, err := c.RestartUnitContext(ctx, "tailscaled.service", "replace", ch); err != nil {
return fmt.Errorf("failed to restart tailscaled.service: %w", err)
}
select {
case res := <-ch:
if res != "done" {
return fmt.Errorf("systemd service restart failed with result %q", res)
}
case <-ctx.Done():
return ctx.Err()
}
return nil
}

@ -1,15 +0,0 @@
// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
//go:build !linux
package clientupdate
import (
"context"
"errors"
)
func restartSystemdUnit(ctx context.Context) error {
return errors.ErrUnsupported
}

@ -6,11 +6,9 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
W github.com/alexbrainman/sspi/internal/common from github.com/alexbrainman/sspi/negotiate
W 💣 github.com/alexbrainman/sspi/negotiate from tailscale.com/net/tshttpproxy
L github.com/coreos/go-iptables/iptables from tailscale.com/util/linuxfw
L github.com/coreos/go-systemd/v22/dbus from tailscale.com/clientupdate
W 💣 github.com/dblohm7/wingoes from github.com/dblohm7/wingoes/pe+
W 💣 github.com/dblohm7/wingoes/pe from tailscale.com/util/winutil/authenticode
github.com/fxamacker/cbor/v2 from tailscale.com/tka
L 💣 github.com/godbus/dbus/v5 from github.com/coreos/go-systemd/v22/dbus
github.com/golang/groupcache/lru from tailscale.com/net/dnscache
L github.com/google/nftables from tailscale.com/util/linuxfw
L 💣 github.com/google/nftables/alignedbuff from github.com/google/nftables/xt
@ -271,7 +269,7 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
image/png from github.com/skip2/go-qrcode
io from archive/tar+
io/fs from archive/tar+
io/ioutil from github.com/godbus/dbus/v5+
io/ioutil from github.com/mitchellh/go-ps+
log from expvar+
log/internal from log
maps from tailscale.com/clientupdate+

@ -80,7 +80,6 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
L github.com/aws/smithy-go/waiter from github.com/aws/aws-sdk-go-v2/service/ssm
github.com/bits-and-blooms/bitset from github.com/gaissmai/bart
L github.com/coreos/go-iptables/iptables from tailscale.com/util/linuxfw
L github.com/coreos/go-systemd/v22/dbus from tailscale.com/clientupdate
LD 💣 github.com/creack/pty from tailscale.com/ssh/tailssh
W 💣 github.com/dblohm7/wingoes from github.com/dblohm7/wingoes/com+
W 💣 github.com/dblohm7/wingoes/com from tailscale.com/cmd/tailscaled+
@ -98,7 +97,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
github.com/go-json-experiment/json/jsontext from tailscale.com/logtail
W 💣 github.com/go-ole/go-ole from github.com/go-ole/go-ole/oleutil+
W 💣 github.com/go-ole/go-ole/oleutil from tailscale.com/wgengine/winnet
L 💣 github.com/godbus/dbus/v5 from github.com/coreos/go-systemd/v22/dbus+
L 💣 github.com/godbus/dbus/v5 from tailscale.com/net/dns+
github.com/golang/groupcache/lru from tailscale.com/net/dnscache
github.com/google/btree from gvisor.dev/gvisor/pkg/tcpip/header+
L github.com/google/nftables from tailscale.com/util/linuxfw

@ -16,7 +16,6 @@ require (
github.com/aws/aws-sdk-go-v2/service/ssm v1.44.7
github.com/coreos/go-iptables v0.7.1-0.20240112124308-65c67c9f46e6
github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf
github.com/coreos/go-systemd/v22 v22.5.0
github.com/creack/pty v1.1.21
github.com/dave/courtney v0.4.0
github.com/dave/jennifer v1.7.0

@ -217,8 +217,6 @@ github.com/coreos/go-iptables v0.7.1-0.20240112124308-65c67c9f46e6 h1:8h5+bWd7R6
github.com/coreos/go-iptables v0.7.1-0.20240112124308-65c67c9f46e6/go.mod h1:Qe8Bv2Xik5FyTXwgIbLAnv2sWSBmvWdFETJConOQ//Q=
github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf h1:iW4rZ826su+pqaw19uhpSCzhj44qo35pNgKFGqzDKkU=
github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
github.com/coreos/go-systemd/v22 v22.5.0 h1:RrqgGjYQKalulkV8NGVIfkXQf6YYmOyiJKk8iXXhfZs=
github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/creack/pty v1.1.21 h1:1/QdRyBaHHJP61QkWMXlOIBfsgdDeeKfK8SYVUWJKf0=
@ -362,7 +360,6 @@ github.com/gobuffalo/flect v1.0.2 h1:eqjPGSo2WmjgY2XlpGwo2NXgL3RucAKo4k4qQMNA5sA
github.com/gobuffalo/flect v1.0.2/go.mod h1:A5msMlrHtLqh9umBSnvabjsMrCcCpAyzglnDvkbYKHs=
github.com/gobwas/glob v0.2.3 h1:A4xDbljILXROh+kObIiy5kIaPYD8e96x1tgBhUI5J+Y=
github.com/gobwas/glob v0.2.3/go.mod h1:d3Ez4x06l9bZtSvzIay5+Yzi0fmZzPgnTbPcKjJAkT8=
github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
github.com/godbus/dbus/v5 v5.1.1-0.20230522191255-76236955d466 h1:sQspH8M4niEijh3PFscJRLDnkL547IeP7kpPe3uUhEg=
github.com/godbus/dbus/v5 v5.1.1-0.20230522191255-76236955d466/go.mod h1:ZiQxhyQ+bbbfxUKVvjfO498oPYvtYhZzycal3G/NHmU=
github.com/gofrs/flock v0.8.1 h1:+gYjHKf32LDeiEEFhQaotPbLuUXjY5ZqxKgXy7n59aw=

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