This also update:
- runc to 3f2f8b84a77f73d38244dd690525642a72156c64
- runtime-specs to v1.0.0
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
Upstream-commit: 45d85c99139bbd16004bbedb7d5bac6a60264538
Component: engine
Current insider builds of Windows have support for mounting individual
named pipe servers from the host to the guest. This allows, for example,
exposing the docker engine's named pipe to a container.
This change allows the user to request such a mount via the normal bind
mount syntax in the CLI:
docker run -v \\.\pipe\docker_engine:\\.\pipe\docker_engine <args>
Signed-off-by: John Starks <jostarks@microsoft.com>
Upstream-commit: 54354db850664783918a1fc9d208bcfcf47c28e2
Component: engine
Changes most references of syscall to golang.org/x/sys/
Ones aren't changes include, Errno, Signal and SysProcAttr
as they haven't been implemented in /x/sys/.
Signed-off-by: Christopher Jones <tophj@linux.vnet.ibm.com>
[s390x] switch utsname from unsigned to signed
per 33267e036f
char in s390x in the /x/sys/unix package is now signed, so
change the buildtags
Signed-off-by: Christopher Jones <tophj@linux.vnet.ibm.com>
Upstream-commit: 069fdc8a083cb1663e4f86fe3fd9b9a1aebc3e54
Component: engine
During container startup we end up spending a fair amount of time
encoding/decoding json.
This cuts out some of that since we already have the decoded object in
memory.
The old flow looked like:
1. Start container request
2. Create file
3. Encode container spec to json
4. Write to file
5. Close file
6. Open file
7. Read file
8. Decode container spec
9. Close file
10. Send to containerd.
The new flow cuts out steps 6-9 completely, and with it a lot of time
spent in reflect and file IO.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 8d588d9c5b5cd019e09bcfc4f790eae79405c7b1
Component: engine
Docker use default GRPC backoff strategy to reconnect to containerd when
connection is lost. and the delay time grows exponentially, until reaches 120s.
So Change the max delay time to 2s to avoid docker and containerd
connection failure.
Signed-off-by: Wentao Zhang <zhangwentao234@huawei.com>
Upstream-commit: d3d8c77d195ce74f36ae6eee24578b9cac48f897
Component: engine
It has observed defunct containerd processes accumulating over
time while dockerd was permanently failing to restart containerd.
Due to a bug in the runContainerdDaemon() function, dockerd does not clean up
its child process if containerd already exits very soon after the (re)start.
The reproducer and analysis below comes from docker 1.12.x but bug
still applies on latest master.
- from libcontainerd/remote_linux.go:
329 func (r *remote) runContainerdDaemon() error {
:
: // start the containerd child process
:
403 if err := cmd.Start(); err != nil {
404 return err
405 }
:
: // If containerd exits very soon after (re)start, it is
possible
: // that containerd is already in defunct state at the time
when
: // dockerd gets here. The setOOMScore() function tries to
write
: // to /proc/PID_OF_CONTAINERD/oom_score_adj. However, this
fails
: // with errno EINVAL because containerd is defunct. Please see
: // snippets of kernel source code and further explanation
below.
:
407 if err := setOOMScore(cmd.Process.Pid, r.oomScore); err != nil
{
408 utils.KillProcess(cmd.Process.Pid)
:
: // Due to the error from write() we return here. As
the
: // goroutine that would clean up the child has not
been
: // started yet, containerd remains in the defunct
state
: // and never gets reaped.
:
409 return err
410 }
:
417 go func() {
418 cmd.Wait()
419 close(r.daemonWaitCh)
420 }() // Reap our child when needed
:
423 }
This is the kernel function that gets invoked when dockerd tries to
write
to /proc/PID_OF_CONTAINERD/oom_score_adj.
- from fs/proc/base.c:
1197 static ssize_t oom_score_adj_write(struct file *file, ...
1198 size_t count, loff_t
*ppos)
1199 {
:
1223 task = get_proc_task(file_inode(file));
:
: // The defunct containerd process does not have a virtual
: // address space anymore, i.e. task->mm is NULL. Thus the
: // following code returns errno EINVAL to dockerd.
:
1230 if (!task->mm) {
1231 err = -EINVAL;
1232 goto err_task_lock;
1233 }
:
1253 err_task_lock:
:
1257 return err < 0 ? err : count;
1258 }
The purpose of the following program is to demonstrate the behavior of
the oom_score_adj_write() function in connection with a defunct process.
$ cat defunct_test.c
\#include <unistd.h>
main()
{
pid_t pid = fork();
if (pid == 0)
// child
_exit(0);
// parent
pause();
}
$ make defunct_test
cc defunct_test.c -o defunct_test
$ ./defunct_test &
[1] 3142
$ ps -f | grep defunct_test | grep -v grep
root 3142 2956 0 13:04 pts/0 00:00:00 ./defunct_test
root 3143 3142 0 13:04 pts/0 00:00:00 [defunct_test] <defunct>
$ echo "ps 3143" | crash -s
PID PPID CPU TASK ST %MEM VSZ RSS COMM
3143 3142 2 ffff880035def300 ZO 0.0 0 0
defunct_test
$ echo "px ((struct task_struct *)0xffff880035def300)->mm" | crash -s
$1 = (struct mm_struct *) 0x0
^^^ task->mm is NULL
$ cat /proc/3143/oom_score_adj
0
$ echo 0 > /proc/3143/oom_score_adj
-bash: echo: write error: Invalid argument"
---
This patch fixes the above issue by making sure we start the reaper
goroutine as soon as possible.
Signed-off-by: Antonio Murdaca <runcom@redhat.com>
Upstream-commit: 27087eacbf96e6ef9d48a6d3dc89c7c1cff155b4
Component: engine
Description:
Kill docker-containerd continuously, and use kill -SIGUSR1 <dockerpid>
to check docker callstacks. And we will find that event
handler: startEventsMonitor or handleEventStream will exit.
This will only happen when system is busy, containerd need more time to
startup, and the monitor gorotine maybe exit.
Signed-off-by: Wentao Zhang <zhangwentao234@huawei.com>
Upstream-commit: 02ce73f62e73e78a4ec29b29fb2ba552221fe885
Component: engine
fix when rpc reports "transport is closing" error, health check go routine will exit
Upstream-commit: e103125883ec3c03a8523682ed62f33d04e0ade9
Component: engine
