cmd/k8s-operator: send operator logs to tailscale (#17110)

This commit modifies the k8s operator to wrap its logger using the logtail
logger provided via the tsnet server. This causes any logs written by
the operator to make their way to Tailscale in the same fashion as
wireguard logs to be used by support.

This functionality can also be opted-out of entirely using the
"TS_NO_LOGS_NO_SUPPORT" environment variable.

Updates https://github.com/tailscale/corp/issues/32037

Signed-off-by: David Bond <davidsbond93@gmail.com>

cmd/k8s-operator/operator.go

@@ -44,6 +44,7 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/manager/signals"
 	"sigs.k8s.io/controller-runtime/pkg/predicate"
 	"sigs.k8s.io/controller-runtime/pkg/reconcile"
+	"tailscale.com/envknob"
 
 	"tailscale.com/client/local"
 	"tailscale.com/client/tailscale"
@@ -133,6 +134,14 @@ func main() {
 			}
 		}()
 	}
+
+	// Operator log uploads can be opted-out using the "TS_NO_LOGS_NO_SUPPORT" environment variable.
+	if !envknob.NoLogsNoSupport() {
+		zlog = zlog.WithOptions(zap.WrapCore(func(core zapcore.Core) zapcore.Core {
+			return wrapZapCore(core, s.LogtailWriter())
+		}))
+	}
+
 	rOpts := reconcilerOpts{
 		log:                           zlog,
 		tsServer:                      s,