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ipn/ipnlocal: support most Linuxes in handleC2NUpdate (#9114)

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* ipn/ipnlocal: support most Linuxes in handleC2NUpdate

Updates #6995

Signed-off-by: Chris Palmer <cpalmer@tailscale.com>
This commit is contained in:
Chris Palmer
2023-08-30 14:50:03 -07:00
committed by GitHub
parent c621141746
commit ce1e02096a
4 changed files with 101 additions and 76 deletions
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26
ipn/ipnlocal/c2n.go
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@@ -16,13 +16,13 @@ import (
"strconv"
"time"
"tailscale.com/clientupdate"
"tailscale.com/envknob"
"tailscale.com/net/sockstats"
"tailscale.com/tailcfg"
"tailscale.com/util/clientmetric"
"tailscale.com/util/goroutines"
"tailscale.com/version"
"tailscale.com/version/distro"
)
var c2nLogHeap func(http.ResponseWriter, *http.Request) // non-nil on most platforms (c2n_pprof.go)
@@ -115,17 +115,24 @@ func (b *LocalBackend) handleC2NUpdate(w http.ResponseWriter, r *http.Request) {
// TODO(bradfitz): add some sort of semaphore that prevents two concurrent
// updates, or if one happened in the past 5 minutes, or something.
var res tailcfg.C2NUpdateResponse
res.Enabled = envknob.AllowsRemoteUpdate()
res.Supported = runtime.GOOS == "windows" || (runtime.GOOS == "linux" && distro.Get() == distro.Debian)
switch r.Method {
case "GET", "POST":
default:
// GET returns the current status, and POST actually begins an update.
if r.Method != "GET" && r.Method != "POST" {
http.Error(w, "bad method", http.StatusMethodNotAllowed)
return
}
// If NewUpdater does not return an error, we can update the installation.
// Exception: When version.IsMacSysExt returns true, we don't support that
// yet. TODO(cpalmer, #6995): Implement it.
//
// Note that we create the Updater solely to check for errors; we do not
// invoke it here. For this purpose, it is ok to pass it a zero Arguments.
_, err := clientupdate.NewUpdater(clientupdate.Arguments{})
res := tailcfg.C2NUpdateResponse{
Enabled: envknob.AllowsRemoteUpdate(),
Supported: err == nil && !version.IsMacSysExt(),
}
defer func() {
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode(res)
@@ -134,16 +141,15 @@ func (b *LocalBackend) handleC2NUpdate(w http.ResponseWriter, r *http.Request) {
if r.Method == "GET" {
return
}
if !res.Enabled {
res.Err = "not enabled"
return
}
if !res.Supported {
res.Err = "not supported"
return
}
cmdTS, err := findCmdTailscale()
if err != nil {
res.Err = fmt.Sprintf("failed to find cmd/tailscale binary: %v", err)