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>
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>
These are only used on OS X Docker, and ignored elsewhere - but
since they are ignored, they're guaranteed to be safe everywhere,
and people are using them.
Fixes: #3340
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
We made changes earlier that empty storage options when setting
storage driver explicitly. Unfortunately, this breaks rootless
cleanup commands, as they lose the fuse-overlayfs mount program
path.
Fix this by passing along the storage options to the cleanup
process.
Also, fix --syslog, which was broken a while ago (probably when
we broke up main to add main_remote).
Fixes#3326
Signed-off-by: Matthew Heon <mheon@redhat.com>
When we supercede low-priority mounts and volumes (image volumes,
and volumes sourced from --volumes-from) with higher-priority
ones (the --volume and --mount flags), we always replaced
lower-priority mounts of the same type (e.g. a user mount to
/tmp/test1 would supercede a volumes-from mount to the same
destination). However, we did not supercede the opposite type - a
named volume from image volumes at /tmp/test1 would be allowed to
remain and create a conflict, preventing container creation.
Solve this by destroying opposite types before merging (we can't
do it in the same loop, as then named volumes, which go second,
might trample changes made by mounts).
Fixes#3174
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
force the resources block to be empty instead of having default
values.
Regression introduced by 8e88461511
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>
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 ensures that all tmpfs mounts added by the user, even with
the --mount flag, share a few common options (nosuid, noexec,
nodev), and options for tmpfs mounts are properly validated to
ensure they are correct.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
As part of this, move bind mount option validity parsing and
modification (adding e.g. rbind on bind mounts that are missing
it), which requires test changes (expected values have changed).
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
We were unconditionally resetting volume mount options for all
mount points (and by the looks of things, completely dropping
tmpfs mounts), which was causing runc to refuse to run containers
and all the tests to consequently fail.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Several changes made in the interface of pkg/spec make
interacting with it without a runtime difficult to impossible,
so move the existing limited testing from cmd/podman (which
mostly tested pkg/spec) into pkg/spec itself where we can call
individual functions that don't break things.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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>
Play kube was passing the pod, but CreateConfig was not. Unify it
so they both do, so we can remove some unnecessary duplicate
lookup code.
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>
build a podman-remote binary for windows that allows users to use the
remote client on windows and interact with podman on linux system.
Signed-off-by: baude <bbaude@redhat.com>
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>
