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cmd/tailscaled: default to userspace-networking mode on gokrazy, set paths

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One of the current few steps to run Tailscale on gokrazy is to
specify the --tun=userspace-networking flag:

    https://gokrazy.org/userguide/install/tailscale/

Instead, make it the default for now. Later we can change the
default to kernel mode if available and fall back to userspace
mode like Synology, once #391 is done.

Likewise, set default paths for Gokrazy, as its filesystem hierarchy
is not the Linux standard one. Instead, use the conventional paths as
documented at https://gokrazy.org/userguide/install/tailscale/.

Updates #1866

RELNOTE=default to userspace-networking mode on gokrazy

Change-Id: I3766159a294738597b4b30629d2860312dbb7609
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
(cherry picked from commit db85384f9c)
This commit is contained in:
Brad Fitzpatrick 2022-03-01 19:49:24 -08:00 committed by Brad Fitzpatrick
parent d0698cfcec
commit 231f8b74e4
3 changed files with 25 additions and 2 deletions
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18
cmd/tailscaled/tailscaled.go
View File

@ -68,11 +68,27 @@ func defaultTunName() string {
// as a magic value that uses/creates any free number.
return "utun"
case "linux":
if distro.Get() == distro.Synology {
switch distro.Get() {
case distro.Synology:
// Try TUN, but fall back to userspace networking if needed.
// See https://github.com/tailscale/tailscale-synology/issues/35
return "tailscale0,userspace-networking"
case distro.Gokrazy:
// Gokrazy doesn't yet work in tun mode because the whole
// Gokrazy thing is no C code, and Tailscale currently
// depends on the iptables binary for Linux's
// wgengine/router.
// But on Gokrazy there's no legacy iptables, so we could use netlink
// to program nft-iptables directly. It just isn't done yet;
// see https://github.com/tailscale/tailscale/issues/391
//
// But Gokrazy does have the tun module built-in, so users
// can stil run --tun=tailscale0 if they wish, if they
// arrange for iptables to be present or run in "tailscale
// up --netfilter-mode=off" mode, perhaps. Untested.
return "userspace-networking"
}
}
return "tailscale0"
}

5
paths/paths.go
View File

@ -28,7 +28,8 @@ func DefaultTailscaledSocket() string {
if runtime.GOOS == "darwin" {
return "/var/run/tailscaled.socket"
}
if distro.Get() == distro.Synology {
switch distro.Get() {
case distro.Synology:
// TODO(maisem): be smarter about this. We can parse /etc/VERSION.
const dsm6Sock = "/var/packages/Tailscale/etc/tailscaled.sock"
const dsm7Sock = "/var/packages/Tailscale/var/tailscaled.sock"
@ -38,6 +39,8 @@ func DefaultTailscaledSocket() string {
if fi, err := os.Stat(dsm7Sock); err == nil && !fi.IsDir() {
return dsm7Sock
}
case distro.Gokrazy:
return "/perm/tailscaled/tailscaled.sock"
}
if fi, err := os.Stat("/var/run"); err == nil && fi.IsDir() {
return "/var/run/tailscale/tailscaled.sock"

4
paths/paths_unix.go
View File

@ -14,6 +14,7 @@
"runtime"
"golang.org/x/sys/unix"
"tailscale.com/version/distro"
)
func init() {
@ -34,6 +35,9 @@ func statePath() string {
}
func stateFileUnix() string {
if distro.Get() == distro.Gokrazy {
return "/perm/tailscaled/tailscaled.state"
}
path := statePath()
if path == "" {
return ""