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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
ipn/ipnlocal/network-lock.go
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@@ -24,7 +24,7 @@ import (
"tailscale.com/types/tkatype"
)
var networkLockAvailable = envknob.Bool("TS_EXPERIMENTAL_NETWORK_LOCK")
var networkLockAvailable = envknob.RegisterBool("TS_EXPERIMENTAL_NETWORK_LOCK")
type tkaState struct {
authority *tka.Authority
@@ -82,7 +82,7 @@ func (b *LocalBackend) NetworkLockInit(keys []tka.Key) error {
if b.tka != nil {
return errors.New("network-lock is already initialized")
}
if !networkLockAvailable {
if !networkLockAvailable() {
return errors.New("this is an experimental feature in your version of tailscale - Please upgrade to the latest to use this.")
}
if !b.CanSupportNetworkLock() {