Previously, loader.signalProcess was inconsitently using both root and
container's PID namespace to find the process. It used root namespace
for the exec'd process and container's PID namespace for other processes.
This fixes the code to use the root PID namespace across the board, which
is the same PID reported in `runsc ps` (or soon will after
https://github.com/google/gvisor/pull/5519).
PiperOrigin-RevId: 358836297
Operations are now shut down automatically by the main Stop
command, and it is not necessary to call Stop during Destroy.
Fixes#5454
PiperOrigin-RevId: 357295930
Some versions of the Go runtime call getcpu(), so add it for compatibility. The
hostcpu package already uses getcpu() on arm64.
PiperOrigin-RevId: 355717757
Because we lack gVisor-internal cgroups, we take the CPU usage of the entire pod
and divide it proportionally according to sentry-internal usage stats.
This fixes `kubectl top pods`, which gets a pod's CPU usage by summing the usage
of its containers.
Addresses #172.
PiperOrigin-RevId: 355229833
in nested container, we see paths from host in /proc/self/cgroup, so we
need to re-process that path to get a relative path to be used inside
the container.
Without it, runsc generates ugly paths that may trip other cgroup
watchers that expect clean paths. An example of ugly path is:
```
/sys/fs/cgroup/memory/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93/cgroupPath
```
Notice duplication of `docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93`
`/proc/1/cgroup` looks like
```
12:perf_event:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
11:blkio:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
10:freezer:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
9:hugetlb:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
8:devices:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
7:rdma:/
6:pids:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
5:cpuset:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
4:cpu,cpuacct:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
3:memory:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
2:net_cls,net_prio:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
1:name=systemd:/docker/e383892b29290ae8005d535f2dadc4a583bb354d5bb1ba8c10bf900d92c4db93
0::/system.slice/containerd.service
```
This is not necessary when the parent container was created with cgroup
namespace, but that setup is not very common right now.
Signed-off-by: Daniel Dao <dqminh89@gmail.com>
Previously fsgofer was skipping chown call if the uid and gid
were the same as the current user/group. However, when setgid
is set, the group may not be the same as the caller. Instead,
compare the actual uid/gid of the file after it has been
created and change ownership only if needed.
Updates #180
PiperOrigin-RevId: 353118733
Whether the variable was found is already returned by syscall.Getenv.
os.Getenv drops this value while os.Lookupenv passes it along.
PiperOrigin-RevId: 351674032
These are primarily simplification and lint mistakes. However, minor
fixes are also included and tests added where appropriate.
PiperOrigin-RevId: 351425971
This includes minor fix-ups:
* Handle SIGTERM in runsc debug, to exit gracefully.
* Fix cmd.debug.go opening all profiles as RDONLY.
* Fix the test name in fio_test.go, and encode the block size in the test.
PiperOrigin-RevId: 350205718
This allows for a model of profiling when you can start collection, and
it will terminate when the sandbox terminates. Without this synchronous
call, it is effectively impossible to collect length blocking and mutex
profiles.
PiperOrigin-RevId: 349483418
This allows to find all containers inside a sandbox more efficiently.
This operation is required every time a container starts and stops,
and previously required loading *all* container state files to check
whether the container belonged to the sandbox.
Apert from being inneficient, it has caused problems when state files
are stale or corrupt, causing inavalability to create any container.
Also adjust commands `list` and `debug` to skip over files that fail
to load.
Resolves#5052
PiperOrigin-RevId: 348050637
There are surprisingly few syscall tests that run with hostinet. For example
running the following command only returns two results:
`bazel query test/syscalls:all | grep hostnet`
I think as a result, as our control messages evolved, hostinet was left
behind. Update it to support all control messages netstack supports.
This change also updates sentry's control message parsing logic to make it up to
date with all the control messages we support.
PiperOrigin-RevId: 347508892
This command takes instruction pointers from stdin and converts them into their
corresponding file names and line/column numbers in the runsc source code. The
inputs are not interpreted as actual addresses, but as synthetic values that are
exposed through /sys/kernel/debug/kcov. One can extract coverage information
from kcov and translate those values into locations in the source code by
running symbolize on the same runsc binary.
This will allow us to generate syzkaller coverage reports.
PiperOrigin-RevId: 347089624
fdbased endpoint was enabling fragment reassembly on the host AF_PACKET socket
to ensure that fragments are delivered inorder to the right dispatcher. But this
prevents fragments from being delivered to gvisor at all and makes testing of
gvisor's fragment reassembly code impossible.
The potential impact from this is minimal since IP Fragmentation is not really
that prevelant and in cases where we do get fragments we may deliver the
fragment out of order to the TCP layer as multiple network dispatchers may
process the fragments and deliver a reassembled fragment after the next packet
has been delivered to the TCP endpoint. While not desirable I believe the impact
from this is minimal due to low prevalence of fragmentation.
Also removed PktType and Hatype fields when binding the socket as these are not
used when binding. Its just confusing to have them specified.
See: https://man7.org/linux/man-pages/man7/packet.7.html
"Fields used for binding are
sll_family (should be AF_PACKET), sll_protocol, and sll_ifindex."
Fixes#5055
PiperOrigin-RevId: 346919439
A few images were broken with respect to aarch64. We should now
be able to run push-all-images with ARCH=aarch64 as part of the
regular continuous integration builds, and add aarch64 smoke tests
(via user emulation for now) to the regular test suite (future).
PiperOrigin-RevId: 346685462
Container is not thread-safe, locking must be done in the caller.
The test was calling Container.Wait() from multiple threads with
no synchronization.
Also removed Container.WaitPID from test because the process might
have already existed when wait is called.
PiperOrigin-RevId: 343176280
- Make AddressableEndpoint optional for NetworkEndpoint.
Not all NetworkEndpoints need to support addressing (e.g. ARP), so
AddressableEndpoint should only be implemented for protocols that
support addressing such as IPv4 and IPv6.
With this change, tcpip.ErrNotSupported will be returned by the stack
when attempting to modify addresses on a network endpoint that does
not support addressing.
Now that packets are fully handled at the network layer, and (with this
change) addresses are optional for network endpoints, we no longer need
the workaround for ARP where a fake ARP address was added to each NIC
that performs ARP so that packets would be delivered to the ARP layer.
PiperOrigin-RevId: 342722547
When OOM score adjustment needs to be set, all the containers need to be
loaded to find all containers that belong to the sandbox. However, each
load signals the container to ensure it is still alive. OOM score
adjustment is set during creation and deletion of every container, generating
a flood of signals to all containers. The fix removes the signal check
when it's not needed.
There is also a race fetching OOM score adjustment value from the parent when
the sandbox exits at the same time (the time it took to signal containers above
made this window quite large). The fix is to store the original value
in the sandbox state file and use it when the value needs to be restored.
Also add more logging and made the existing ones more consistent to help with
debugging.
PiperOrigin-RevId: 340940799
Fabricio Voznika
Adin Scannell
Zach Koopmans
Ting-Yu Wang
Michael Pratt
Kevin Krakauer
gVisor bot
Daniel Dao
Dean Deng
Andrei Vagin
Etienne Perot
Ayush Ranjan
Bhasker Hariharan
Peter Johnston
Jamie Liu
Ghanan Gowripalan