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envknob: support changing envknobs post-init

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Updates #5114

Change-Id: Ia423fc7486e1b3f3180a26308278be0086fae49b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2022-09-14 12:49:39 -07:00
committed by Brad Fitzpatrick
parent 33ee2c058e
commit 74674b110d
31 changed files with 311 additions and 167 deletions
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4
net/dns/manager_windows.go
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@ -32,7 +32,7 @@ const (
versionKey = `SOFTWARE\Microsoft\Windows NT\CurrentVersion`
)
var configureWSL = envknob.Bool("TS_DEBUG_CONFIGURE_WSL")
var configureWSL = envknob.RegisterBool("TS_DEBUG_CONFIGURE_WSL")
type windowsManager struct {
logf logger.Logf
@ -359,7 +359,7 @@ func (m windowsManager) SetDNS(cfg OSConfig) error {
// On initial setup of WSL, the restart caused by --shutdown is slow,
// so we do it out-of-line.
if configureWSL {
if configureWSL() {
go func() {
if err := m.wslManager.SetDNS(cfg); err != nil {
m.logf("WSL SetDNS: %v", err) // continue