Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS
Mirrored from https://github.com/Slazee/caddy.git
Synced Nov 10, 22:30 UTC
| 1 | // Copyright 2015 Matthew Holt and The Caddy Authors |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | //go:build !windows && !plan9 && !nacl && !js |
| 16 | |
| 17 | package caddy |
| 18 | |
| 19 | import ( |
| 20 | "context" |
| 21 | "errors" |
| 22 | "os" |
| 23 | "os/signal" |
| 24 | "syscall" |
| 25 | |
| 26 | "github.com/caddyserver/certmagic" |
| 27 | "go.uber.org/zap" |
| 28 | ) |
| 29 | |
| 30 | // trapSignalsPosix captures POSIX-only signals. |
| 31 | func trapSignalsPosix() { |
| 32 | // Ignore all SIGPIPE signals to prevent weird issues with systemd: https://github.com/dunglas/frankenphp/issues/1020 |
| 33 | // Docker/Moby has a similar hack: https://github.com/moby/moby/blob/d828b032a87606ae34267e349bf7f7ccb1f6495a/cmd/dockerd/docker.go#L87-L90 |
| 34 | signal.Ignore(syscall.SIGPIPE) |
| 35 | |
| 36 | go func() { |
| 37 | sigchan := make(chan os.Signal, 1) |
| 38 | signal.Notify(sigchan, syscall.SIGTERM, syscall.SIGHUP, syscall.SIGQUIT, syscall.SIGUSR1, syscall.SIGUSR2) |
| 39 | |
| 40 | for sig := range sigchan { |
| 41 | switch sig { |
| 42 | case syscall.SIGQUIT: |
| 43 | Log().Info("quitting process immediately", zap.String("signal", "SIGQUIT")) |
| 44 | certmagic.CleanUpOwnLocks(context.TODO(), Log()) // try to clean up locks anyway, it's important |
| 45 | os.Exit(ExitCodeForceQuit) |
| 46 | |
| 47 | case syscall.SIGTERM: |
| 48 | Log().Info("shutting down apps, then terminating", zap.String("signal", "SIGTERM")) |
| 49 | exitProcessFromSignal("SIGTERM") |
| 50 | |
| 51 | case syscall.SIGUSR1: |
| 52 | logger := Log().With(zap.String("signal", "SIGUSR1")) |
| 53 | // If we know the last source config file/adapter (set when starting |
| 54 | // via `caddy run --config <file> --adapter <adapter>`), attempt |
| 55 | // to reload from that source. Otherwise, ignore the signal. |
| 56 | file, adapter, reloadCallback := getLastConfig() |
| 57 | if file == "" { |
| 58 | logger.Info("last config unknown, ignored SIGUSR1") |
| 59 | break |
| 60 | } |
| 61 | logger = logger.With( |
| 62 | zap.String("file", file), |
| 63 | zap.String("adapter", adapter)) |
| 64 | if reloadCallback == nil { |
| 65 | logger.Warn("no reload helper available, ignored SIGUSR1") |
| 66 | break |
| 67 | } |
| 68 | logger.Info("reloading config from last-known source") |
| 69 | if err := reloadCallback(file, adapter); errors.Is(err, errReloadFromSourceUnavailable) { |
| 70 | // No reload helper available (likely not started via caddy run). |
| 71 | logger.Warn("reload from source unavailable in this process; ignored SIGUSR1") |
| 72 | } else if err != nil { |
| 73 | logger.Error("failed to reload config from file", zap.Error(err)) |
| 74 | } else { |
| 75 | logger.Info("successfully reloaded config from file") |
| 76 | } |
| 77 | |
| 78 | case syscall.SIGUSR2: |
| 79 | Log().Info("not implemented", zap.String("signal", "SIGUSR2")) |
| 80 | |
| 81 | case syscall.SIGHUP: |
| 82 | // ignore; this signal is sometimes sent outside of the user's control |
| 83 | Log().Info("not implemented", zap.String("signal", "SIGHUP")) |
| 84 | } |
| 85 | } |
| 86 | }() |
| 87 | } |