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envknob: add new package for all the strconv.ParseBool(os.Getenv(..))

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A new package can also later record/report which knobs are checked and
set. It also makes the code cleaner & easier to grep for env knobs.

Change-Id: Id8a123ab7539f1fadbd27e0cbeac79c2e4f09751
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2022-01-24 10:52:57 -08:00
committed by Brad Fitzpatrick
parent 6feb8f4c51
commit 41fd4eab5c
39 changed files with 195 additions and 128 deletions
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4
health/health.go
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@@ -10,13 +10,13 @@ import (
"errors"
"fmt"
"net/http"
"os"
"runtime"
"sort"
"sync"
"sync/atomic"
"time"
"tailscale.com/envknob"
"tailscale.com/tailcfg"
"tailscale.com/util/multierr"
)
@@ -308,7 +308,7 @@ func OverallError() error {
return overallErrorLocked()
}
var fakeErrForTesting = os.Getenv("TS_DEBUG_FAKE_HEALTH_ERROR")
var fakeErrForTesting = envknob.String("TS_DEBUG_FAKE_HEALTH_ERROR")
func overallErrorLocked() error {
if !anyInterfaceUp {