if the cgroup manager is set to systemd, detect if dbus is available,
otherwise fallback to --cgroup-manager=cgroupfs.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
even if the system is using cgroups v2, rootless is not able to setup
limits when the cgroup-manager is not systemd.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
CRI-O defaults to 1024 for the maximum pids in a container. Podman
should have a similar limit. Once we have a containers.conf, we can
set the limit in this file, and have it easily customizable.
Currently the documentation says that -1 sets pids-limit=max, but -1 fails.
This patch allows -1, but also indicates that 0 also sets the max pids limit.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
if there are no resources specified, make sure the OCI resources block
is empty so that the OCI runtime won't complain.
Signed-off-by: Giuseppe Scrivano <gscrivan@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>
If I mount, say, /usr/bin into my container - I expect to be able
to run the executables in that mount. Unconditionally applying
noexec would be a bad idea.
Before my patches to change mount options and allow exec/dev/suid
being set explicitly, we inferred the mount options from where on
the base system the mount originated, and the options it had
there. Implement the same functionality for the new option
handling.
There's a lot of performance left on the table here, but I don't
know that this is ever going to take enough time to make it worth
optimizing.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Previously, we explicitly set noexec/nosuid/nodev on every mount,
with no ability to disable them. The 'mount' command on Linux
will accept their inverses without complaint, though - 'noexec'
is counteracted by 'exec', 'nosuid' by 'suid', etc. Add support
for passing these options at the command line to disable our
explicit forcing of security options.
This also cleans up mount option handling significantly. We are
still parsing options in more than one place, which isn't good,
but option parsing for bind and tmpfs mounts has been unified.
Fixes: #3819Fixes: #3803
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Sharing a UTS namespace means sharing the hostname. Fix situations where a container in a pod didn't properly share the hostname of the pod.
Signed-off-by: Peter Hunt <pehunt@redhat.com>
allow a container to run in a new cgroup namespace.
When running in a new cgroup namespace, the current cgroup appears to
be the root, so that there is no way for the container to access
cgroups outside of its own subtree.
By default it uses --cgroup=host to keep the previous behavior.
To create a new namespace, --cgroup=private must be provided.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
We can infer no-new-privileges. For now, manually populate
seccomp (can't infer what file we sourced from) and
SELinux/Apparmor (hard to tell if they're enabled or not).
Signed-off-by: Matthew Heon <mheon@redhat.com>
When we first began writing Podman, we ran into a major issue
when implementing Inspect. Libpod deliberately does not tie its
internal data structures to Docker, and stores most information
about containers encoded within the OCI spec. However, Podman
must present a CLI compatible with Docker, which means it must
expose all the information in 'docker inspect' - most of which is
not contained in the OCI spec or libpod's Config struct.
Our solution at the time was the create artifact. We JSON'd the
complete CreateConfig (a parsed form of the CLI arguments to
'podman run') and stored it with the container, restoring it when
we needed to run commands that required the extra info.
Over the past month, I've been looking more at Inspect, and
refactored large portions of it into Libpod - generating them
from what we know about the OCI config and libpod's (now much
expanded, versus previously) container configuration. This path
comes close to completing the process, moving the last part of
inspect into libpod and removing the need for the create
artifact.
This improves libpod's compatability with non-Podman containers.
We no longer require an arbitrarily-formatted JSON blob to be
present to run inspect.
Fixes: #3500
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
when the container is running in a user namespace, check if gid=5 is
available, otherwise drop the option gid=5 for /dev/pts.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
add a simple way to copy ulimit values from the host.
if --ulimit host is used then the current ulimits in place are copied
to the container.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
force the resources block to be empty instead of having default
values.
Regression introduced by 8e88461511e81d2327e4c1a1315bb58fda1827ca
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
We were always raising an error when the rootless user attempted to
setup resources, but this is not the case anymore with cgroup v2.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Unify handling for the --volume, --mount, --volumes-from, --tmpfs
and --init flags into a single file and set of functions. This
will greatly improve readability and maintainability.
Further, properly handle superceding and conflicting mounts. Our
current patchwork has serious issues when mounts conflict, or
when a mount from --volumes-from or an image volume should be
overwritten by a user volume or named volume.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
The goal here is to keep only the configuration directly used to
build the container in CreateConfig, and scrub temporary state
and helpers that we need to generate. We'll keep those internally
in MakeContainerConfig.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Right now, there are two major API calls necessary to turn a
filled-in CreateConfig into the options and OCI spec necessary to
make a libpod Container. I'm intending on refactoring both of
these extensively to unify a few things, so make a common
frontend to both that will prevent API changes from leaking out
of the package.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
The --read-only-tmpfs option caused podman to mount tmpfs on /run, /tmp, /var/tmp
if the container is running int read-only mode.
The default is true, so you would need to execute a command like
--read-only --read-only-tmpfs=false to turn off this behaviour.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
We were never using it. It's actually a potentially quite sizable
field (very expensive to decode an array of structs!). Removing
it should do no harm.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Now that named volumes must be explicitly enumerated rather than
passed in with all other volumes, we need to split normal and
named volumes up before passing them into libpod. This PR does
this.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Signed-off-by: TomSweeneyRedHat <tsweeney@redhat.com>
Vendors in fsouza/docker-client, docker/docker and
a few more related. Of particular note, changes to the TweakCapabilities()
function from docker/docker along with the parse.IDMappingOptions() function
from Buildah. Please pay particular attention to the related changes in
the call from libpod to those functions during the review.
Passes baseline tests.
Currently if you turn on --net=host on a rootless container
and have selinux-policy installed in the image, tools running with
SELinux will see that the system is SELinux enabled in rootless mode.
This patch mounts a tmpfs over /sys/fs/selinux blocking this behaviour.
This patch also fixes the fact that if you shared --pid=host we were not
masking over certin /proc paths.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This is a workaround for the runc issue:
https://github.com/opencontainers/runc/issues/1247
If the source of a bind mount has any of nosuid, noexec or nodev, be
sure to propagate them to the bind mount so that when runc tries to
remount using MS_RDONLY, these options are also used.
Closes: https://github.com/containers/libpod/issues/2312
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
when running in rootless mode we were unconditionally overriding
/dev/pts to take ride of gid=5. This is not needed when multiple gids
are present in the namespace, which is always the case except when
running the tests suite with only one mapping. So change it to check
how many gids are present before overriding the default mount.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
When using --pid=host don't try to cover /proc paths, as they are
coming from the /proc bind mounted from the host.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Apply the default AppArmor profile at container initialization to cover
all possible code paths (i.e., podman-{start,run}) before executing the
runtime. This allows moving most of the logic into pkg/apparmor.
Also make the loading and application of the default AppArmor profile
versio-indepenent by checking for the `libpod-default-` prefix and
over-writing the profile in the run-time spec if needed.
The intitial run-time spec of the container differs a bit from the
applied one when having started the container, which results in
displaying a potentially outdated AppArmor profile when inspecting
a container. To fix that, load the container config from the file
system if present and use it to display the data.
Fixes: #2107
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Updating the vendor or runc to pull in some fixes that we need.
In order to get this vendor to work, we needed to update the vendor
of docker/docker, which causes all sorts of issues, just to fix
the docker/pkg/sysinfo. Rather then doing this, I pulled in pkg/sysinfo
into libpod and fixed the code locally.
I then switched the use of docker/pkg/sysinfo to libpod/pkg/sysinfo.
I also switched out the docker/pkg/mount to containers/storage/pkg/mount
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
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>
Podman will search through the directory and will add any device
nodes that it finds. If no devices are found we return an error.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
We are still requiring oci-systemd-hook to be installed in order to run
systemd within a container. This patch properly mounts
/sys/fs/cgroup/systemd/libpod_parent/libpod-UUID on /sys/fs/cgroup/systemd inside of container.
Since we need the UUID of the container, we needed to move Systemd to be a config option of the
container.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
