TUN-3375: Upgrade coredns and prometheus dependencies

2025-07-28 04:49:58 +00:00 · 2020-09-09 13:09:42 -05:00
parent 7acea1ac99
commit 741cd66c9e
757 changed files with 86868 additions and 32428 deletions
--- a/vendor/github.com/caddyserver/caddy/sigtrap_posix.go
+++ b/vendor/github.com/caddyserver/caddy/sigtrap_posix.go
@@ -0,0 +1,114 @@
+// Copyright 2015 Light Code Labs, LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !windows,!plan9,!nacl,!js
+
+package caddy
+
+import (
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/caddyserver/caddy/telemetry"
+)
+
+// trapSignalsPosix captures POSIX-only signals.
+func trapSignalsPosix() {
+	go func() {
+		sigchan := make(chan os.Signal, 1)
+		signal.Notify(sigchan, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGQUIT, syscall.SIGUSR1, syscall.SIGUSR2)
+
+		for sig := range sigchan {
+			switch sig {
+			case syscall.SIGQUIT:
+				log.Println("[INFO] SIGQUIT: Quitting process immediately")
+				for _, f := range OnProcessExit {
+					f() // only perform important cleanup actions
+				}
+				os.Exit(0)
+
+			case syscall.SIGTERM:
+				log.Println("[INFO] SIGTERM: Shutting down servers then terminating")
+				exitCode := executeShutdownCallbacks("SIGTERM")
+				for _, f := range OnProcessExit {
+					f() // only perform important cleanup actions
+				}
+				err := Stop()
+				if err != nil {
+					log.Printf("[ERROR] SIGTERM stop: %v", err)
+					exitCode = 3
+				}
+
+				telemetry.AppendUnique("sigtrap", "SIGTERM")
+				go telemetry.StopEmitting() // won't finish in time, but that's OK - just don't block
+
+				os.Exit(exitCode)
+
+			case syscall.SIGUSR1:
+				log.Println("[INFO] SIGUSR1: Reloading")
+				go telemetry.AppendUnique("sigtrap", "SIGUSR1")
+
+				// Start with the existing Caddyfile
+				caddyfileToUse, inst, err := getCurrentCaddyfile()
+				if err != nil {
+					log.Printf("[ERROR] SIGUSR1: %v", err)
+					continue
+				}
+				if loaderUsed.loader == nil {
+					// This also should never happen
+					log.Println("[ERROR] SIGUSR1: no Caddyfile loader with which to reload Caddyfile")
+					continue
+				}
+
+				// Load the updated Caddyfile
+				newCaddyfile, err := loaderUsed.loader.Load(inst.serverType)
+				if err != nil {
+					log.Printf("[ERROR] SIGUSR1: loading updated Caddyfile: %v", err)
+					continue
+				}
+				if newCaddyfile != nil {
+					caddyfileToUse = newCaddyfile
+				}
+
+				// Backup old event hooks
+				oldEventHooks := cloneEventHooks()
+
+				// Purge the old event hooks
+				purgeEventHooks()
+
+				// Kick off the restart; our work is done
+				EmitEvent(InstanceRestartEvent, nil)
+				_, err = inst.Restart(caddyfileToUse)
+				if err != nil {
+					restoreEventHooks(oldEventHooks)
+
+					log.Printf("[ERROR] SIGUSR1: %v", err)
+				}
+
+			case syscall.SIGUSR2:
+				log.Println("[INFO] SIGUSR2: Upgrading")
+				go telemetry.AppendUnique("sigtrap", "SIGUSR2")
+				if err := Upgrade(); err != nil {
+					log.Printf("[ERROR] SIGUSR2: upgrading: %v", err)
+				}
+
+			case syscall.SIGHUP:
+				// ignore; this signal is sometimes sent outside of the user's control
+				go telemetry.AppendUnique("sigtrap", "SIGHUP")
+			}
+		}
+	}()
+}