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Graceful: Allow graceful restart for unix sockets (#9113)

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Previously we could not handle graceful restarts for http over unix
sockets. These can now be handled.
This commit is contained in:
zeripath 2019-11-24 02:11:24 +00:00 • committed by Antoine GIRARD
parent bb2c0c3729
commit e3f22ad2cc
4 changed files with 31 additions and 30 deletions
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29
cmd/web.go
View file

@ -60,7 +60,7 @@ func runHTTPRedirector() {
http.Redirect(w, r, target, http.StatusTemporaryRedirect)
})
var err = runHTTP(source, context2.ClearHandler(handler))
var err = runHTTP("tcp", source, context2.ClearHandler(handler))
if err != nil {
log.Fatal("Failed to start port redirection: %v", err)
@ -77,12 +77,12 @@ func runLetsEncrypt(listenAddr, domain, directory, email string, m http.Handler)
go func() {
log.Info("Running Let's Encrypt handler on %s", setting.HTTPAddr+":"+setting.PortToRedirect)
// all traffic coming into HTTP will be redirect to HTTPS automatically (LE HTTP-01 validation happens here)
var err = runHTTP(setting.HTTPAddr+":"+setting.PortToRedirect, certManager.HTTPHandler(http.HandlerFunc(runLetsEncryptFallbackHandler)))
var err = runHTTP("tcp", setting.HTTPAddr+":"+setting.PortToRedirect, certManager.HTTPHandler(http.HandlerFunc(runLetsEncryptFallbackHandler)))
if err != nil {
log.Fatal("Failed to start the Let's Encrypt handler on port %s: %v", setting.PortToRedirect, err)
}
}()
return runHTTPSWithTLSConfig(listenAddr, certManager.TLSConfig(), context2.ClearHandler(m))
return runHTTPSWithTLSConfig("tcp", listenAddr, certManager.TLSConfig(), context2.ClearHandler(m))
}
func runLetsEncryptFallbackHandler(w http.ResponseWriter, r *http.Request) {
@ -171,7 +171,7 @@ func runWeb(ctx *cli.Context) error {
switch setting.Protocol {
case setting.HTTP:
NoHTTPRedirector()
err = runHTTP(listenAddr, context2.ClearHandler(m))
err = runHTTP("tcp", listenAddr, context2.ClearHandler(m))
case setting.HTTPS:
if setting.EnableLetsEncrypt {
err = runLetsEncrypt(listenAddr, setting.Domain, setting.LetsEncryptDirectory, setting.LetsEncryptEmail, context2.ClearHandler(m))
@ -182,7 +182,7 @@ func runWeb(ctx *cli.Context) error {
} else {
NoHTTPRedirector()
}
err = runHTTPS(listenAddr, setting.CertFile, setting.KeyFile, context2.ClearHandler(m))
err = runHTTPS("tcp", listenAddr, setting.CertFile, setting.KeyFile, context2.ClearHandler(m))
case setting.FCGI:
NoHTTPRedirector()
// FCGI listeners are provided as stdin - this is orthogonal to the LISTEN_FDS approach
@ -200,25 +200,8 @@ func runWeb(ctx *cli.Context) error {
}()
err = fcgi.Serve(listener, context2.ClearHandler(m))
case setting.UnixSocket:
// This could potentially be inherited using LISTEN_FDS but currently
// these cannot be inherited
NoHTTPRedirector()
NoMainListener()
if err := os.Remove(listenAddr); err != nil && !os.IsNotExist(err) {
log.Fatal("Failed to remove unix socket directory %s: %v", listenAddr, err)
}
var listener *net.UnixListener
listener, err = net.ListenUnix("unix", &net.UnixAddr{Name: listenAddr, Net: "unix"})
if err != nil {
break // Handle error after switch
}
// FIXME: add proper implementation of signal capture on all protocols
// execute this on SIGTERM or SIGINT: listener.Close()
if err = os.Chmod(listenAddr, os.FileMode(setting.UnixSocketPermission)); err != nil {
log.Fatal("Failed to set permission of unix socket: %v", err)
}
err = http.Serve(listener, context2.ClearHandler(m))
err = runHTTP("unix", listenAddr, context2.ClearHandler(m))
default:
log.Fatal("Invalid protocol: %s", setting.Protocol)
}

12
cmd/web_graceful.go
View file

@ -11,16 +11,16 @@ import (
"code.gitea.io/gitea/modules/graceful"
)
func runHTTP(listenAddr string, m http.Handler) error {
return graceful.HTTPListenAndServe("tcp", listenAddr, m)
func runHTTP(network, listenAddr string, m http.Handler) error {
return graceful.HTTPListenAndServe(network, listenAddr, m)
}
func runHTTPS(listenAddr, certFile, keyFile string, m http.Handler) error {
return graceful.HTTPListenAndServeTLS("tcp", listenAddr, certFile, keyFile, m)
func runHTTPS(network, listenAddr, certFile, keyFile string, m http.Handler) error {
return graceful.HTTPListenAndServeTLS(network, listenAddr, certFile, keyFile, m)
}
func runHTTPSWithTLSConfig(listenAddr string, tlsConfig *tls.Config, m http.Handler) error {
return graceful.HTTPListenAndServeTLSConfig("tcp", listenAddr, tlsConfig, m)
func runHTTPSWithTLSConfig(network, listenAddr string, tlsConfig *tls.Config, m http.Handler) error {
return graceful.HTTPListenAndServeTLSConfig(network, listenAddr, tlsConfig, m)
}
// NoHTTPRedirector tells our cleanup routine that we will not be using a fallback http redirector

15
modules/graceful/net_unix.go
View file

@ -16,6 +16,7 @@ import (
"sync"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
)
const (
@ -165,15 +166,27 @@ func GetListenerUnix(network string, address *net.UnixAddr) (*net.UnixListener,
if isSameAddr(l.Addr(), address) {
providedListeners = append(providedListeners[:i], providedListeners[i+1:]...)
activeListeners = append(activeListeners, l)
return l.(*net.UnixListener), nil
unixListener := l.(*net.UnixListener)
unixListener.SetUnlinkOnClose(true)
return unixListener, nil
}
}
// make a fresh listener
if err := os.Remove(address.Name); err != nil && !os.IsNotExist(err) {
return nil, fmt.Errorf("Failed to remove unix socket %s: %v", address.Name, err)
}
l, err := net.ListenUnix(network, address)
if err != nil {
return nil, err
}
fileMode := os.FileMode(setting.UnixSocketPermission)
if err = os.Chmod(address.Name, fileMode); err != nil {
return nil, fmt.Errorf("Failed to set permission of unix socket to %s: %v", fileMode.String(), err)
}
activeListeners = append(activeListeners, l)
return l, nil
}

5
modules/graceful/restart_unix.go
View file

@ -9,6 +9,7 @@ package graceful
import (
"fmt"
"net"
"os"
"os/exec"
"strings"
@ -48,6 +49,10 @@ func RestartProcess() (int, error) {
if err != nil {
return 0, err
}
if unixListener, ok := l.(*net.UnixListener); ok {
unixListener.SetUnlinkOnClose(false)
}
// Remember to close these at the end.
defer files[i].Close()
}