This rather naively fixes an error observed where a processes stdio
streams are not written to when there is an error upon starting up the
process, such as when the executable doesn't exist within the
container's rootfs.
Before the "fix", when an error occurred on start, `terminate` is called
immediately, which calls `cmd.Process.Kill()`, then calling `Wait()` on
the process. In some cases when this `Kill` is called the stdio stream
have not yet been written to, causing non-deterministic output. The
error itself is properly preserved but users attached to the process
will not see this error.
With the fix it is just calling `Wait()` when an error occurs rather
than trying to `Kill()` the process first. This seems to preserve stdio.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Fix the permissions of the container's main processes STDIO when the
process is not run as the root user. This changes the permissions right
before switching to the specified user so that it's STDIO matches it's
UID and GID.
Add a test for checking that the STDIO of the process is owned by the
specified user.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
I got:
```
exec_test.go:823: Mode expected to contain 'ro,nosuid,nodev,noexec': tmpfs on /sys/fs/cgroup type tmpfs (ro,seclabel,nosuid,nodev,noexec,relatime,mode=755
```wq
Signed-off-by: Qiang Huang <h.huangqiang@huawei.com>
As v2.1.0 is no longer required for successful testing, do not build it in the
Dockerfile - instead just use the version Ubuntu ships.
Signed-off-by: Matthew Heon <mheon@redhat.com>
This removes the existing, native Go seccomp filter generation and replaces it
with Libseccomp. Libseccomp is a C library which provides architecture
independent generation of Seccomp filters for the Linux kernel.
This adds a dependency on v2.2.1 or above of Libseccomp.
Signed-off-by: Matthew Heon <mheon@redhat.com>
When the copyBusybox() fails, the error message should be
propagated to the caller of newRootfs().
Signed-off-by: Lai Jiangshan <jiangshanlai@gmail.com>
It can happen if newContainer is failed. Now test shows real error from
newContainer instead of trace.
Signed-off-by: Alexander Morozov <lk4d4@docker.com>
Alexander Morozov
Brian Goff
Vivek Goyal
Michael Crosby
Mrunal Patel
Rajasekaran
David Calavera
Alexander Morozov
Vishnu Kannan
Qiang Huang
Matthew Heon
Mrunal Patel
Andrey Vagin
Lai Jiangshan