mirror of
https://github.com/caddyserver/caddy.git
synced 2025-11-03 19:17:29 -05:00
45fb7202ac
Initial sd_notify support was added in #3963, but that sent signals from both cmdRun and cmdReload. This approach has two drawbacks: - Reloads initiated via the API do not send signals. - The signals are sent from different processes, which requires the `NotifyAccess=exec` directive in the unit file. This change moves the NotifyReloading and NotifyReadiness invocations to Load, which address both of those drawbacks. It also adds a complimentary NotifyStopping method which is invoked from handleStop. All the notify methods are defined in a notify package to avoid an import loop.
81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
|
|
//
|
|
// 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.
|
|
|
|
package notify
|
|
|
|
import (
|
|
"io"
|
|
"net"
|
|
"os"
|
|
"strings"
|
|
)
|
|
|
|
// The documentation about this IPC protocol is available here:
|
|
// https://www.freedesktop.org/software/systemd/man/sd_notify.html
|
|
|
|
func sdNotify(path, payload string) error {
|
|
socketAddr := &net.UnixAddr{
|
|
Name: path,
|
|
Net: "unixgram",
|
|
}
|
|
|
|
conn, err := net.DialUnix(socketAddr.Net, nil, socketAddr)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer conn.Close()
|
|
|
|
if _, err := io.Copy(conn, strings.NewReader(payload)); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// notifyReadiness notifies systemd that caddy has finished its
|
|
// initialization routines.
|
|
func notifyReadiness() error {
|
|
val, ok := os.LookupEnv("NOTIFY_SOCKET")
|
|
if !ok || val == "" {
|
|
return nil
|
|
}
|
|
if err := sdNotify(val, "READY=1"); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// notifyReloading notifies systemd that caddy is reloading its config.
|
|
func notifyReloading() error {
|
|
val, ok := os.LookupEnv("NOTIFY_SOCKET")
|
|
if !ok || val == "" {
|
|
return nil
|
|
}
|
|
if err := sdNotify(val, "RELOADING=1"); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// notifyStopping notifies systemd that caddy is stopping.
|
|
func notifyStopping() error {
|
|
val, ok := os.LookupEnv("NOTIFY_SOCKET")
|
|
if !ok || val == "" {
|
|
return nil
|
|
}
|
|
if err := sdNotify(val, "STOPPING=1"); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|