We should not be throwing errors because the operation we wanted
to perform is already done. Now, it is definitely strange that a
container is actually unmounted, but shows as mounted in the DB -
if this reoccurs in a way where we can investigate, it's worth
tearing into.
Fixes#4033
Signed-off-by: Matthew Heon <mheon@redhat.com>
If you are running a rootless container on cgroupV1
you can not pause the container. We need to report the proper error
if this happens.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
when executing a healthcheck, we were not cleaning up after exec's use
of a socket. we now remove the socket file and ignore if for reason it
does not exist.
Fixes: #3962
Signed-off-by: baude <bbaude@redhat.com>
This is mostly used with Systemd, which really wants to manage
CGroups itself when managing containers via unit file.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Previously, we only did this for volumes created at the same time
as the container. However, this is not correct behavior - Docker
does so for all named volumes, even those made with
'podman volume create' and mounted into a container later.
Fixes#3945
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
When we fail to remove a container's SHM, that's an error, and we
need to report it as such. This may be part of our lingering
storage woes.
Also, remove MNT_DETACH. It may be another cause of the storage
removal failures.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
When volume options and the local volume driver are specified,
the volume is intended to be mounted using the 'mount' command.
Supported options will be used to volume the volume before the
first container using it starts, and unmount the volume after the
last container using it dies.
This should work for any local filesystem, though at present I've
only tested with tmpfs and btrfs.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Support generating systemd unit files for a pod. Podman generates one
unit file for the pod including the PID file for the infra container's
conmon process and one unit file for each container (excluding the infra
container).
Note that this change implies refactorings in the `pkg/systemdgen` API.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Old versions of conmon have a bug where they create the exit file before
closing open file descriptors causing a race condition when restarting
containers with open ports since we cannot bind the ports as they're not
yet closed by conmon.
Killing the old conmon PID is ~okay since it forces the FDs of old
conmons to be closed, while it's a NOP for newer versions which should
have exited already.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
When forcibly removing a container, we are initiating an explicit
stop of the container, which is not reflected in 'podman events'.
Swap to using our standard 'stop()' function instead of a custom
one for force-remove, and move the event into the internal stop
function (so internal calls also register it).
This does add one more database save() to `podman remove`. This
should not be a terribly serious performance hit, and does have
the desirable side effect of making things generally safer.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
the exit file
If the container exit code needs to be retained, it cannot be retained
in tmpfs, because libpod runs in a memcg itself so it can't leave
traces with a daemon-less design.
This wasn't a memleak detectable by kmemleak for example. The kernel
never lost track of the memory and there was no erroneous refcounting
either. The reference count dependencies however are not easy to track
because when a refcount is increased, there's no way to tell who's
still holding the reference. In this case it was a single page of
tmpfs pagecache holding a refcount that kept pinned a whole hierarchy
of dying memcg, slab kmem, cgropups, unrechable kernfs nodes and the
respective dentries and inodes. Such a problem wouldn't happen if the
exit file was stored in a regular filesystem because the pagecache
could be reclaimed in such case under memory pressure. The tmpfs page
can be swapped out, but that's not enough to release the memcg with
CONFIG_MEMCG_SWAP_ENABLED=y.
No amount of more aggressive kernel slab shrinking could have solved
this. Not even assigning slab kmem of dying cgroups to alive cgroup
would fully solve this. The only way to free the memory of a dying
cgroup when a struct page still references it, would be to loop over
all "struct page" in the kernel to find which one is associated with
the dying cgroup which is a O(N) operation (where N is the number of
pages and can reach billions). Linking all the tmpfs pages to the
memcg would cost less during memcg offlining, but it would waste lots
of memory and CPU globally. So this can't be optimized in the kernel.
A cronjob running this command can act as workaround and will allow
all slab cache to be released, not just the single tmpfs pages.
rm -f /run/libpod/exits/*
This patch solved the memleak with a reproducer, booting with
cgroup.memory=nokmem and with selinux disabled. The reason memcg kmem
and selinux were disabled for testing of this fix, is because kmem
greatly decreases the kernel effectiveness in reusing partial slab
objects. cgroup.memory=nokmem is strongly recommended at least for
workstation usage. selinux needs to be further analyzed because it
causes further slab allocations.
The upstream podman commit used for testing is
1fe2965e4f (v1.4.4).
The upstream kernel commit used for testing is
f16fea666898dbdd7812ce94068c76da3e3fcf1e (v5.2-rc6).
Reported-by: Michele Baldessari <michele@redhat.com>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
<Applied with small tweaks to comments>
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
This includes:
Implement exec -i and fix some typos in description of -i docs
pass failed runtime status to caller
Add resize handling for a terminal connection
Customize exec systemd-cgroup slice
fix healthcheck
fix top
add --detach-keys
Implement podman-remote exec (jhonce)
* Cleanup some orphaned code (jhonce)
adapt remote exec for conmon exec (pehunt)
Fix healthcheck and exec to match docs
Introduce two new OCIRuntime errors to more comprehensively describe situations in which the runtime can error
Use these different errors in branching for exit code in healthcheck and exec
Set conmon to use new api version
Signed-off-by: Jhon Honce <jhonce@redhat.com>
Signed-off-by: Peter Hunt <pehunt@redhat.com>
Specifically, we were needlessly doing a double lookup to find which config mounts were user volumes. Improve this by refactoring a bit of code from inspect
Signed-off-by: Peter Hunt <pehunt@redhat.com>
the compilation demands of having libpod in main is a burden for the
remote client compilations. to combat this, we should move the use of
libpod structs, vars, constants, and functions into the adapter code
where it will only be compiled by the local client.
this should result in cleaner code organization and smaller binaries. it
should also help if we ever need to compile the remote client on
non-Linux operating systems natively (not cross-compiled).
Signed-off-by: baude <bbaude@redhat.com>
Restoring a container from a checkpoint archive creates a complete
new root file-system. This file-system needs to have the correct SELinux
label or most things in that restored container will fail. Running
processes are not as problematic as newly exec()'d process (internally
or via 'podman exec').
This patch tells the storage setup which label should be used to mount
the container's root file-system.
Signed-off-by: Adrian Reber <areber@redhat.com>
Allow Podman containers to request to use a specific OCI runtime
if multiple runtimes are configured. This is the first step to
properly supporting containers in a multi-runtime environment.
The biggest changes are that all OCI runtimes are now initialized
when Podman creates its runtime, and containers now use the
runtime requested in their configuration (instead of always the
default runtime).
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
The storage driver and the storage options in storage.conf should
match, but if you change the storage driver via the command line
then we need to nil out the default storage options from storage.conf.
If the user wants to change the storage driver and use storage options,
they need to specify them on the command line.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This commit adds an option to the checkpoint command to export a
checkpoint into a tar.gz file as well as importing a checkpoint tar.gz
file during restore. With all checkpoint artifacts in one file it is
possible to easily transfer a checkpoint and thus enabling container
migration in Podman. With the following steps it is possible to migrate
a running container from one system (source) to another (destination).
Source system:
* podman container checkpoint -l -e /tmp/checkpoint.tar.gz
* scp /tmp/checkpoint.tar.gz destination:/tmp
Destination system:
* podman pull 'container-image-as-on-source-system'
* podman container restore -i /tmp/checkpoint.tar.gz
The exported tar.gz file contains the checkpoint image as created by
CRIU and a few additional JSON files describing the state of the
checkpointed container.
Now the container is running on the destination system with the same
state just as during checkpointing. If the container is kept running
on the source system with the checkpoint flag '-R', the result will be
that the same container is running on two different hosts.
Signed-off-by: Adrian Reber <areber@redhat.com>
This adds a couple of function in structure members needed in the next
commit to make container migration actually work. This just splits of
the function which are not modifying existing code.
Signed-off-by: Adrian Reber <areber@redhat.com>
Remove this IsNotExist out which was added along with the rest of this
block in f6a2b6bf2b (hooks: Add pre-create hooks for runtime-config
manipulation, 2018-11-19, #1830). Besides the obvious "hook directory
does not exist", it was swallowing the less-obvious "hook command does
not exist". And either way, folks are likely going to want non-zero
podman exits when we fail to load a hook directory they explicitly
pointed us towards.
Signed-off-by: W. Trevor King <wking@tremily.us>
replace two usage of kwait.ExponentialBackoff in favor of WaitForFile
that uses inotify when possible.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Instead of rewriting the logic, reuse the standard logic we use
for removing containers, which is much better tested.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
After a reboot, when we refresh Podman's state, we retrieved the
lock from the fresh SHM instance, but we did not mark it as
allocated to prevent it being handed out to other containers and
pods.
Provide a method for marking locks as in-use, and use it when we
refresh Podman state after a reboot.
Fixes#2900
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
The on-failure restart option supports restarting only a given
number of times. To do this, we need one additional field in the
DB to track restart count (which conveniently fills a field in
Inspect we weren't populating), plus some plumbing logic.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
This field indicates that a container was explciitly stopped by
an API call, and did not exit naturally. It's used when
implementing restart policy for containers.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
As part of this, rework the number of workers used by various
Podman tasks to match original behavior - need an explicit
fallthrough in the switch statement for that block to work as
expected.
Also, trivial change to Podman cleanup to work on initialized
containers - we need to reset to a different state after cleaning
up the OCI runtime.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
All IDs in libpod are stored as a full container ID. We can get a
container by full ID faster with GetContainer (which directly
retrieves) than LookupContainer (which finds a match, then
retrieves). No reason to use Lookup when we have full IDs present
and available.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Don't sort OCI hooks using the locale collation order; it does not
make sense for the same system-wide directory to be interpreted differently
depending on the user's LC_COLLATE setting, and the language-specific
collation order can even change over time.
Besides, the current collation order determination code has never worked
with the most common LC_COLLATE values like en_US.UTF-8.
Ideally, we would like to just order based on Unicode code points
to be reliably stable, but the existing implementation is case-insensitive,
so we are forced to rely on the unicode case mapping tables at least.
(This gives up on canonicalization and width-insensitivity, potentially
breaking users who rely on these previously documented properties.)
Signed-off-by: Miloslav Trmač <mitr@redhat.com>
* refactor command output to use one function
* Add new worker pool parallel operations
* Implement podman-remote umount
* Refactored podman wait to use printCmdOutput()
Signed-off-by: Jhon Honce <jhonce@redhat.com>
This swaps the previous handling (parse all volume mounts on the
container and look for ones that might refer to named volumes)
for the new, explicit named volume lists stored per-container.
It also deprecates force-removing volumes that are in use. I
don't know how we want to handle this yet, but leaving containers
that depend on a volume that no longer exists is definitely not
correct.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
We have an issue in the current implementation where the cleanup
process is not able to umount the storage as it is running in a
separate namespace.
Simplify the implementation for user namespaces by not using an
intermediate mount namespace. For doing it, we need to relax the
permissions on the parent directories and allow browsing
them. Containers that are running without a user namespace, will still
maintain mode 0700 on their directory.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
podman will not start a transient service and timer for healthchecks.
this handles the tracking of the timing for health checks.
added the 'started' status which represents the time that a container is
in its start-period.
the systemd timing can be disabled with an env variable of
DISABLE_HC_SYSTEMD="true".
added filter for ps where --filter health=[starting, healthy, unhealthy]
can now be used.
Signed-off-by: baude <bbaude@redhat.com>
When creating a new image volume to be mounted into a container, we need to
make sure the new volume matches the Ownership and permissions of the path
that it will be mounted on.
For example if a volume inside of a containre image is owned by the database
UID, we want the volume to be mounted onto the image to be owned by the
database UID.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
In lipod, we now log major events that occurr. These events
can be displayed using the `podman events` command. Each
event contains:
* Type (container, image, volume, pod...)
* Status (create, rm, stop, kill, ....)
* Timestamp in RFC3339Nano format
* Name (if applicable)
* Image (if applicable)
The format of the event and the varlink endpoint are to not
be considered stable until cockpit has done its enablement.
Signed-off-by: baude <bbaude@redhat.com>
We're going to feed this into Go's BCP 47 language parser. Language
tags have the form [1]:
language
["-" script]
["-" region]
*("-" variant)
*("-" extension)
["-" privateuse]
and locales have the form [2]:
[language[_territory][.codeset][@modifier]]
The modifier is useful for collation, but Go's language-based API
[3] does not provide a way for us to supply it. This code converts
our locale to a BCP 47 language by stripping the dot and later and
replacing the first underscore, if any, with a hyphen. This will
avoid errors like [4]:
WARN[0000] failed to parse language "en_US.UTF-8": language: tag is not well-formed
when feeding language.Parse(...).
[1]: https://tools.ietf.org/html/bcp47#section-2.1
[2]: http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_02
[3]: https://github.com/golang/go/issues/25340
[4]: https://github.com/containers/libpod/issues/2494
Signed-off-by: W. Trevor King <wking@tremily.us>
Before, any container with a netNS dependency simply used its dependency container's hosts file, and didn't abide its configuration (mainly --add-host). Fix this by always appending to the dependency container's hosts file, creating one if necessary.
Signed-off-by: Peter Hunt <pehunt@redhat.com>
Before, a container being run or started in a pod always restarted the infra container. This was because we didn't take running dependencies into account. Fix this by filtering for dependencies in the running state.
Signed-off-by: Peter Hunt <pehunt@redhat.com>
Prior, a pod would have to be started immediately when created, leading to confusion about what a pod state should be immediately after creation. The problem was podman run --pod ... would error out if the infra container wasn't started (as it is a dependency). Fix this by allowing for recursive start, where each of the container's dependencies are started prior to the new container. This is only applied to the case where a new container is attached to a pod.
Also rework container_api Start, StartAndAttach, and Init functions, as there was some duplicated code, which made addressing the problem easier to fix.
Signed-off-by: Peter Hunt <pehunt@redhat.com>
iFix builtin volumes to work with podman volume
Currently builtin volumes are not recored in podman volumes when
they are created automatically. This patch fixes this.
Remove container volumes when requested
Currently the --volume option on podman remove does nothing.
This will implement the changes needed to remove the volumes
if the user requests it.
When removing a volume make sure that no container uses the volume.
Signed-off-by: Daniel J Walsh dwalsh@redhat.com
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
When cleaning up containers, we presently remove the exit file
created by Conmon, to ensure that if we restart the container, we
won't have conflicts when Conmon tries writing a new exit file.
Unfortunately, we need to retain that exit file (at least until
we get a workable events system), so we can read it in cases
where the container has been removed before 'podman run' can read
its exit code.
So instead of removing it, rename it, so there's no conflict with
Conmon, and we can still read it later.
Fixes: #1640
Signed-off-by: Matthew Heon <mheon@redhat.com>
Instead of unconditionally resetting to ContainerStateConfigured
after a reboot, allow containers in the Exited state to remain
there, preserving their exit code in podman ps after a reboot.
This does not affect the ability to use and restart containers
after a reboot, as the Exited state can be used (mostly)
interchangeably with Configured for starting and managing
containers.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
When waiting for a container, there is a long interval between
status checks - plenty long enough for the container in question
to start, then subsequently be cleaned up and returned to Created
state to be restarted. As such, we can't wait on container state
to go to Stopped or Exited - anything that is not Running or
Paused indicates the container is dead.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
There's been a lot of discussion over in [1] about how to support the
NVIDIA folks and others who want to be able to create devices
(possibly after having loaded kernel modules) and bind userspace
libraries into the container. Currently that's happening in the
middle of runc's create-time mount handling before the container
pivots to its new root directory with runc's incorrectly-timed
prestart hook trigger [2]. With this commit, we extend hooks with a
'precreate' stage to allow trusted parties to manipulate the config
JSON before calling the runtime's 'create'.
I'm recycling the existing Hook schema from pkg/hooks for this,
because we'll want Timeout for reliability and When to avoid the
expense of fork/exec when a given hook does not need to make config
changes [3].
[1]: https://github.com/opencontainers/runc/pull/1811
[2]: https://github.com/opencontainers/runc/issues/1710
[3]: https://github.com/containers/libpod/issues/1828#issuecomment-439888059
Signed-off-by: W. Trevor King <wking@tremily.us>
Runc does not produce helpful error messages when the container's
command is not found, so print the command ourselves.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
We had two problems with /dev/shm, first, you mount the
container read/only then /dev/shm was mounted read/only.
This is a bug a tmpfs directory should be read/write within
a read-only container.
The second problem is we were ignoring users mounted /dev/shm
from the host.
If user specified
podman run -d -v /dev/shm:/dev/shm ...
We were dropping this mount and still using the internal mount.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Instead of forcing another user lookup when mounting image
volumes, just use the information we looked up when we started
generating the spec.
This may resolve#1817
Signed-off-by: Matthew Heon <mheon@redhat.com>
containers inside pods need to make sure they get /etc/resolv.conf
and /etc/hosts bind mounted when network is expected
Signed-off-by: baude <bbaude@redhat.com>
Part of the motivation for 800eb863 (Hooks supports two directories,
process default and override, 2018-09-17, #1487) was [1]:
> We only use this for override. The reason this was caught is people
> are trying to get hooks to work with CoreOS. You are not allowed to
> write to /usr/share... on CoreOS, so they wanted podman to also look
> at /etc, where users and third parties can write.
But we'd also been disabling hooks completely for rootless users. And
even for root users, the override logic was tricky when folks actually
had content in both directories. For example, if you wanted to
disable a hook from the default directory, you'd have to add a no-op
hook to the override directory.
Also, the previous implementation failed to handle the case where
there hooks defined in the override directory but the default
directory did not exist:
$ podman version
Version: 0.11.2-dev
Go Version: go1.10.3
Git Commit: "6df7409cb5a41c710164c42ed35e33b28f3f7214"
Built: Sun Dec 2 21:30:06 2018
OS/Arch: linux/amd64
$ ls -l /etc/containers/oci/hooks.d/test.json
-rw-r--r--. 1 root root 184 Dec 2 16:27 /etc/containers/oci/hooks.d/test.json
$ podman --log-level=debug run --rm docker.io/library/alpine echo 'successful container' 2>&1 | grep -i hook
time="2018-12-02T21:31:19-08:00" level=debug msg="reading hooks from /usr/share/containers/oci/hooks.d"
time="2018-12-02T21:31:19-08:00" level=warning msg="failed to load hooks: {}%!(EXTRA *os.PathError=open /usr/share/containers/oci/hooks.d: no such file or directory)"
With this commit:
$ podman --log-level=debug run --rm docker.io/library/alpine echo 'successful container' 2>&1 | grep -i hook
time="2018-12-02T21:33:07-08:00" level=debug msg="reading hooks from /usr/share/containers/oci/hooks.d"
time="2018-12-02T21:33:07-08:00" level=debug msg="reading hooks from /etc/containers/oci/hooks.d"
time="2018-12-02T21:33:07-08:00" level=debug msg="added hook /etc/containers/oci/hooks.d/test.json"
time="2018-12-02T21:33:07-08:00" level=debug msg="hook test.json matched; adding to stages [prestart]"
time="2018-12-02T21:33:07-08:00" level=warning msg="implicit hook directories are deprecated; set --hooks-dir="/etc/containers/oci/hooks.d" explicitly to continue to load hooks from this directory"
time="2018-12-02T21:33:07-08:00" level=error msg="container create failed: container_linux.go:336: starting container process caused "process_linux.go:399: container init caused \"process_linux.go:382: running prestart hook 0 caused \\\"error running hook: exit status 1, stdout: , stderr: oh, noes!\\\\n\\\"\""
(I'd setup the hook to error out). You can see that it's silenly
ignoring the ENOENT for /usr/share/containers/oci/hooks.d and
continuing on to load hooks from /etc/containers/oci/hooks.d.
When it loads the hook, it also logs a warning-level message
suggesting that callers explicitly configure their hook directories.
That will help consumers migrate, so we can drop the implicit hook
directories in some future release. When folks *do* explicitly
configure hook directories (via the newly-public --hooks-dir and
hooks_dir options), we error out if they're missing:
$ podman --hooks-dir /does/not/exist run --rm docker.io/library/alpine echo 'successful container'
error setting up OCI Hooks: open /does/not/exist: no such file or directory
I've dropped the trailing "path" from the old, hidden --hooks-dir-path
and hooks_dir_path because I think "dir(ectory)" is already enough
context for "we expect a path argument". I consider this name change
non-breaking because the old forms were undocumented.
Coming back to rootless users, I've enabled hooks now. I expect they
were previously disabled because users had no way to avoid
/usr/share/containers/oci/hooks.d which might contain hooks that
required root permissions. But now rootless users will have to
explicitly configure hook directories, and since their default config
is from ~/.config/containers/libpod.conf, it's a misconfiguration if
it contains hooks_dir entries which point at directories with hooks
that require root access. We error out so they can fix their
libpod.conf.
[1]: https://github.com/containers/libpod/pull/1487#discussion_r218149355
Signed-off-by: W. Trevor King <wking@tremily.us>
Currently we are mounting /dev/shm from disk, it should be from a tmpfs.
User Namespace supports tmpfs mounts for nonroot users, so this section of
code should work fine in bother root and rootless mode.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Whe running unittests on newer golang versions, we observe failures with some
formatting types when no declared correctly.
Signed-off-by: baude <bbaude@redhat.com>
We now default to setting storage options to "nodev", when running
privileged containers, we need to turn this off so the processes can
manipulate the image.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This is basically the same change as
ff47a4c2d5 (Use a struct to pass options to Checkpoint())
just for the Restore() function. It is used to pass multiple restore
options to the API and down to conmon which is used to restore
containers. This is for the upcoming changes to support checkpointing
and restoring containers with '--tcp-established'.
Signed-off-by: Adrian Reber <areber@redhat.com>
/etc/resolv.conf and /etc/hosts should not be created and mounted when the
network is disabled.
We should not be calling the network setup and cleanup functions when it is
disabled either.
In doing this patch, I found that all of the bind mounts were particular to
Linux along with the generate functions, so I moved them to
container_internal_linux.go
Since we are checking if we are using a network namespace, we need to check
after the network namespaces has been created in the spec.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Container images can be created without passwd or group file, currently
if one of these containers gets run with a --user flag the container blows
up complaining about t a missing /etc/passwd file.
We just need to check if the error on read is ENOEXIST then allow the
read to return, not fail.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
When we read the conmon error status file, if Atoi fails to parse
the string we read from the file as an int, print the string as
part of the error message so we know what might have gone wrong.
Signed-off-by: Matthew Heon <mheon@redhat.com>
Instead of running a full sync after starting a container to pick
up its PID, grab it from Conmon instead.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
When syncing container state, we normally call out to runc to see
the container's status. This does have significant performance
implications, though, and we've seen issues with large amounts of
runc processes being spawned.
This patch attempts to use stat calls on the container exit file
created by Conmon instead to sync state. This massively decreases
the cost of calling updateContainer (it has gone from an
almost-unconditional fork/exec of runc to a single stat call that
can be avoided in most states).
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Matthew Heon
Daniel J Walsh
baude
OpenShift Merge Robot
Matthew Heon
Valentin Rothberg
Peter Hunt
Giuseppe Scrivano
Adrian Reber
W. Trevor King
Giuseppe Scrivano
Miloslav Trmač
Jhon Honce
Sebastian Jug
Matthew Heon