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1807.patch merged upstream

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Signed-off-by: Lokesh Mandvekar <lsm5@fedoraproject.org>
This commit is contained in:
Lokesh Mandvekar 2020-03-25 09:46:27 -04:00
parent 1519dcf51e
commit c1a39c6422
2 changed files with 0 additions and 279 deletions
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278
1807.patch
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@ -1,278 +0,0 @@
From 3d99c51e1b38a440804a55c9f314f62cc50b8902 Mon Sep 17 00:00:00 2001
From: Giuseppe Scrivano <gscrivan@redhat.com>
Date: Fri, 25 May 2018 18:04:06 +0200
Subject: [PATCH] sd-notify: do not hang when NOTIFY_SOCKET is used with create
if NOTIFY_SOCKET is used, do not block the main runc process waiting
for events on the notify socket. Bind mount the parent directory of
the notify socket, so that "start" can create the socket and it is
still accessible from the container.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
---
notify_socket.go | 112 ++++++++++++++++++++++++++++++++++-------------
signals.go | 4 +-
start.go | 13 +++++-
utils_linux.go | 12 ++++-
4 files changed, 105 insertions(+), 36 deletions(-)
diff --git a/notify_socket.go b/notify_socket.go
index e7453c62..d961453a 100644
--- a/notify_socket.go
+++ b/notify_socket.go
@@ -7,11 +7,13 @@ import (
"fmt"
"net"
"os"
+ "path"
"path/filepath"
+ "strconv"
+ "time"
+ "github.com/opencontainers/runc/libcontainer"
"github.com/opencontainers/runtime-spec/specs-go"
-
- "github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
@@ -27,12 +29,12 @@ func newNotifySocket(context *cli.Context, notifySocketHost string, id string) *
}
root := filepath.Join(context.GlobalString("root"), id)
- path := filepath.Join(root, "notify.sock")
+ socketPath := filepath.Join(root, "notify", "notify.sock")
notifySocket := &notifySocket{
socket: nil,
host: notifySocketHost,
- socketPath: path,
+ socketPath: socketPath,
}
return notifySocket
@@ -44,13 +46,19 @@ func (s *notifySocket) Close() error {
// If systemd is supporting sd_notify protocol, this function will add support
// for sd_notify protocol from within the container.
-func (s *notifySocket) setupSpec(context *cli.Context, spec *specs.Spec) {
- mount := specs.Mount{Destination: s.host, Source: s.socketPath, Options: []string{"bind"}}
+func (s *notifySocket) setupSpec(context *cli.Context, spec *specs.Spec) error {
+ pathInContainer := filepath.Join("/run/notify", path.Base(s.socketPath))
+ mount := specs.Mount{
+ Destination: path.Dir(pathInContainer),
+ Source: path.Dir(s.socketPath),
+ Options: []string{"bind", "nosuid", "noexec", "nodev", "ro"},
+ }
spec.Mounts = append(spec.Mounts, mount)
- spec.Process.Env = append(spec.Process.Env, fmt.Sprintf("NOTIFY_SOCKET=%s", s.host))
+ spec.Process.Env = append(spec.Process.Env, fmt.Sprintf("NOTIFY_SOCKET=%s", pathInContainer))
+ return nil
}
-func (s *notifySocket) setupSocket() error {
+func (s *notifySocket) bindSocket() error {
addr := net.UnixAddr{
Name: s.socketPath,
Net: "unixgram",
@@ -71,45 +79,89 @@ func (s *notifySocket) setupSocket() error {
return nil
}
-// pid1 must be set only with -d, as it is used to set the new process as the main process
-// for the service in systemd
-func (s *notifySocket) run(pid1 int) {
- buf := make([]byte, 512)
- notifySocketHostAddr := net.UnixAddr{Name: s.host, Net: "unixgram"}
+func (s *notifySocket) setupSocketDirectory() error {
+ return os.Mkdir(path.Dir(s.socketPath), 0755)
+}
+
+func notifySocketStart(context *cli.Context, notifySocketHost, id string) (*notifySocket, error) {
+ notifySocket := newNotifySocket(context, notifySocketHost, id)
+ if notifySocket == nil {
+ return nil, nil
+ }
+
+ if err := notifySocket.bindSocket(); err != nil {
+ return nil, err
+ }
+ return notifySocket, nil
+}
+
+func (n *notifySocket) waitForContainer(container libcontainer.Container) error {
+ s, err := container.State()
+ if err != nil {
+ return err
+ }
+ return n.run(s.InitProcessPid)
+}
+
+func (n *notifySocket) run(pid1 int) error {
+ if n.socket == nil {
+ return nil
+ }
+ notifySocketHostAddr := net.UnixAddr{Name: n.host, Net: "unixgram"}
client, err := net.DialUnix("unixgram", nil, &notifySocketHostAddr)
if err != nil {
- logrus.Error(err)
- return
+ return err
}
- for {
- r, err := s.socket.Read(buf)
- if err != nil {
- break
+
+ ticker := time.NewTicker(time.Millisecond * 100)
+ defer ticker.Stop()
+
+ fileChan := make(chan []byte)
+ go func() {
+ for {
+ buf := make([]byte, 512)
+ r, err := n.socket.Read(buf)
+ if err != nil {
+ return
+ }
+ got := buf[0:r]
+ if !bytes.HasPrefix(got, []byte("READY=")) {
+ continue
+ }
+ fileChan <- got
+ return
}
- var out bytes.Buffer
- for _, line := range bytes.Split(buf[0:r], []byte{'\n'}) {
- if bytes.HasPrefix(line, []byte("READY=")) {
+ }()
+
+ for {
+ select {
+ case <-ticker.C:
+ _, err := os.Stat(filepath.Join("/proc", strconv.Itoa(pid1)))
+ if err != nil {
+ return nil
+ }
+ case b := <-fileChan:
+ for _, line := range bytes.Split(b, []byte{'\n'}) {
+ var out bytes.Buffer
_, err = out.Write(line)
if err != nil {
- return
+ return err
}
_, err = out.Write([]byte{'\n'})
if err != nil {
- return
+ return err
}
_, err = client.Write(out.Bytes())
if err != nil {
- return
+ return err
}
// now we can inform systemd to use pid1 as the pid to monitor
- if pid1 > 0 {
- newPid := fmt.Sprintf("MAINPID=%d\n", pid1)
- client.Write([]byte(newPid))
- }
- return
+ newPid := fmt.Sprintf("MAINPID=%d\n", pid1)
+ client.Write([]byte(newPid))
+ return nil
}
}
}
diff --git a/signals.go b/signals.go
index b67f65a0..dd25e094 100644
--- a/signals.go
+++ b/signals.go
@@ -70,6 +70,7 @@ func (h *signalHandler) forward(process *libcontainer.Process, tty *tty, detach
h.notifySocket.run(pid1)
return 0, nil
}
+ h.notifySocket.run(os.Getpid())
go h.notifySocket.run(0)
}
@@ -97,9 +98,6 @@ func (h *signalHandler) forward(process *libcontainer.Process, tty *tty, detach
// status because we must ensure that any of the go specific process
// fun such as flushing pipes are complete before we return.
process.Wait()
- if h.notifySocket != nil {
- h.notifySocket.Close()
- }
return e.status, nil
}
}
diff --git a/start.go b/start.go
index 2bb698b2..3a1769a4 100644
--- a/start.go
+++ b/start.go
@@ -3,6 +3,7 @@ package main
import (
"errors"
"fmt"
+ "os"
"github.com/opencontainers/runc/libcontainer"
"github.com/urfave/cli"
@@ -31,7 +32,17 @@ your host.`,
}
switch status {
case libcontainer.Created:
- return container.Exec()
+ notifySocket, err := notifySocketStart(context, os.Getenv("NOTIFY_SOCKET"), container.ID())
+ if err != nil {
+ return err
+ }
+ if err := container.Exec(); err != nil {
+ return err
+ }
+ if notifySocket != nil {
+ return notifySocket.waitForContainer(container)
+ }
+ return nil
case libcontainer.Stopped:
return errors.New("cannot start a container that has stopped")
case libcontainer.Running:
diff --git a/utils_linux.go b/utils_linux.go
index 984e6b0f..46c26246 100644
--- a/utils_linux.go
+++ b/utils_linux.go
@@ -408,7 +408,9 @@ func startContainer(context *cli.Context, spec *specs.Spec, action CtAct, criuOp
notifySocket := newNotifySocket(context, os.Getenv("NOTIFY_SOCKET"), id)
if notifySocket != nil {
- notifySocket.setupSpec(context, spec)
+ if err := notifySocket.setupSpec(context, spec); err != nil {
+ return -1, err
+ }
}
container, err := createContainer(context, id, spec)
@@ -417,10 +419,16 @@ func startContainer(context *cli.Context, spec *specs.Spec, action CtAct, criuOp
}
if notifySocket != nil {
- err := notifySocket.setupSocket()
+ err := notifySocket.setupSocketDirectory()
if err != nil {
return -1, err
}
+ if action == CT_ACT_RUN {
+ err := notifySocket.bindSocket()
+ if err != nil {
+ return -1, err
+ }
+ }
}
// Support on-demand socket activation by passing file descriptors into the container init process.
--
2.21.0

1
runc.spec
View File

@ -30,7 +30,6 @@ Summary: CLI for running Open Containers
License: ASL 2.0 License: ASL 2.0
URL: %{git0} URL: %{git0}
Source0: %{git0}/archive/%{commit0}/%{name}-%{shortcommit0}.tar.gz Source0: %{git0}/archive/%{commit0}/%{name}-%{shortcommit0}.tar.gz
Patch0: 1807.patch
Patch1: cgroups-v2.patch Patch1: cgroups-v2.patch
# e.g. el6 has ppc64 arch without gcc-go, so EA tag is required # e.g. el6 has ppc64 arch without gcc-go, so EA tag is required