Podman has, for a long time, had an internal concept of
dependency management, used mainly to ensure that pod infra
containers are started before any other container in the pod. We
also have the ability to recursively start these dependencies,
which we use to ensure that `podman start` on a container in a
pod will not fail because the infra container is stopped. We have
not, however, exposed these via the command line until now.
Add a `--requires` flag to `podman run` and `podman create` to
allow users to manually specify dependency containers. These
containers must be running before the container will start. Also,
make recursive starting with `podman start` default so we can
start these containers and their dependencies easily.
Fixes#9250
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
We missed bumping the go module, so let's do it now :)
* Automated go code with github.com/sirkon/go-imports-rename
* Manually via `vgrep podman/v2` the rest
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Implement podman secret create, inspect, ls, rm
Implement podman run/create --secret
Secrets are blobs of data that are sensitive.
Currently, the only secret driver supported is filedriver, which means creating a secret stores it in base64 unencrypted in a file.
After creating a secret, a user can use the --secret flag to expose the secret inside the container at /run/secrets/[secretname]
This secret will not be commited to an image on a podman commit
Signed-off-by: Ashley Cui <acui@redhat.com>
A container's workdir can be specified via the CLI via `--workdir` and
via an image config with the CLI having precedence.
Since images have a tendency to specify workdirs without necessarily
shipping the paths with the root FS, make sure that Podman creates the
workdir. When specified via the CLI, do not create the path, but check
for its existence and return a human-friendly error.
NOTE: `crun` is performing a similar check that would yield exit code
127. With this change, however, Podman performs the check and yields
exit code 126. Since this is specific to `crun`, I do not consider it
to be a breaking change of Podman.
Fixes: #9040
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
When creating a container, do not clear the input-image name before
looking up image names. Also add a regression test.
Fixes: #8558
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Instead of being interpreted as an argument to the boolean flag,
the 'true' is being intepreted as the Podman command to be run -
so we're trying to run `podman true`, which does not exist. This
causes the cleanup command to fail when `--log-level=debug` is
set, so containers are not cleaned up or removed.
This problem is easily reproduced with any command combining the
`--rm`, `-d`, and `--log-level=debug` flags - the command will
execute and exit, but the container will not be removed.
Separate, but worth looking into later: the errors we get on
trying `podman true` with any flags are terrible - if you just
type `podman true` you get a quite sane "Unrecognized command"
error, but if you try `podman true --rm` you get an "unknown flag
--rm" error - which makes very little sense given the command
itself doesn't exist.
Signed-off-by: Matthew Heon <mheon@redhat.com>
Currently we don't document which end of the podman-remote client server
operations uses the containers.conf. This PR begins documenting this
and then testing to make sure the defaults follow the rules.
Fixes: https://github.com/containers/podman/issues/7657
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
podman can now support adding network aliases when running containers
(--network-alias). It requires an updated dnsname plugin as well as an
updated ocicni to work properly.
Signed-off-by: baude <bbaude@redhat.com>
Add a new "image" mount type to `--mount`. The source of the mount is
the name or ID of an image. The destination is the path inside the
container. Image mounts further support an optional `rw,readwrite`
parameter which if set to "true" will yield the mount writable inside
the container. Note that no changes are propagated to the image mount
on the host (which in any case is read only).
Mounts are overlay mounts. To support read-only overlay mounts, vendor
a non-release version of Buildah.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Record the correct image name when creating a container by using the
resolved image name if present. Otherwise, default to using the first
available name or an empty string in which case the image must have been
referenced by ID.
Fixes: #8082
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Docker supports log-opt max_size and so does conmon (ALthough poorly).
Adding support for this allows users to at least make sure their containers
logs do not become a DOS vector.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
All containers within a Pod need to run with the same SELinux
label, unless overwritten by the user.
Also added a bunch of SELinux tests to make sure selinux labels
are correct on namespaces.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Record the user-specified "raw" image name in the SpecGenerator, so we
can pass it along to the config when creating a container. We need a
separate field as the image name in the generator may be set to the
ID of the previously pulled image - ultimately the cause of #7404.
Reverting the image name from the ID to the user input would not work
since "alpine" for pulling iterates over the search registries in the
registries.conf but looking up "alpine" normalizes to
"localhost/alpine".
Recording the raw-image name directly in the generator was the best of
the options I considered as no hidden magic from search registries or
normalizations (that may or may not change in the future) can interfere.
The auto-update backend enforces that the raw-image name is a
fully-qualified reference, so we need to worry about that in the front
end.
Fixes: #7407
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Podman 1.6.2 changed systemd mode auto-detection from commands ending in
``init`` to hard-coded paths ``/sbin/init`` and ``/usr/sbin/init``. This
broke FreeIPA container. ``podman run`` and ``podman create`` now
activate systemd mode when the command is ``/usr/local/sbin/init``.
Fixes: https://github.com/containers/podman/issues/7287
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Buildah and podman build can create images without a working dir.
FROM fedora
WORKDIR /test
If you build this image with caching twice, the second time the image
will not have a working dir.
Similarly if you execute
podman run --workdir /foobar fedora
It blows up since the workingdir is not created automatically.
Finally there was duplicated code for getting the workingdir
out of an image, that this PR removes.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
A recent crun change stopped the creation of the container's
working directory if it does not exist. This is arguably correct
for user-specified directories, to protect against typos; it is
definitely not correct for image WORKDIR, where the image author
definitely intended for the directory to be used.
This makes Podman create the working directory and chown it to
container root, if it does not already exist, and only if it was
specified by an image, not the user.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
--umask sets the umask inside the container
Defaults to 0022
Co-authored-by: Daniel J Walsh <dwalsh@redhat.com>
Signed-off-by: Ashley Cui <acui@redhat.com>
We were only using the Command field in specgen when determining
whether to enable systemd if systemd=true (the default) was used.
This does not include the entrypoint, and does not include any
entrypoint/command sourced from the image - so an image could be
running systemd and we'd not correctly detect this. Using the
full, final command resolves this and matches Podman v1.9.x
behavior.
Fixes#6920
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
In `podman inspect` output for containers and pods, we include
the command that was used to create the container. This is also
used by `podman generate systemd --new` to generate unit files.
With remote podman, the generated create commands were incorrect
since we sourced directly from os.Args on the server side, which
was guaranteed to be `podman system service` (or some variant
thereof). The solution is to pass the command along in the
Specgen or PodSpecgen, where we can source it from the client's
os.Args.
This will still be VERY iffy for mixed local/remote use (doing a
`podman --remote run ...` on a remote client then a
`podman generate systemd --new` on the server on the same
container will not work, because the `--remote` flag will slip
in) but at the very least the output of `podman inspect` will be
correct. We can look into properly handling `--remote` (parsing
it out would be a little iffy) in a future PR.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
--sdnotify container|conmon|ignore
With "conmon", we send the MAINPID, and clear the NOTIFY_SOCKET so the OCI
runtime doesn't pass it into the container. We also advertise "ready" when the
OCI runtime finishes to advertise the service as ready.
With "container", we send the MAINPID, and leave the NOTIFY_SOCKET so the OCI
runtime passes it into the container for initialization, and let the container advertise further metadata.
This is the default, which is closest to the behavior podman has done in the past.
The "ignore" option removes NOTIFY_SOCKET from the environment, so neither podman nor
any child processes will talk to systemd.
This removes the need for hardcoded CID and PID files in the command line, and
the PIDFile directive, as the pid is advertised directly through sd-notify.
Signed-off-by: Joseph Gooch <mrwizard@dok.org>
With the advent of Podman 2.0.0 we crossed the magical barrier of go
modules. While we were able to continue importing all packages inside
of the project, the project could not be vendored anymore from the
outside.
Move the go module to new major version and change all imports to
`github.com/containers/libpod/v2`. The renaming of the imports
was done via `gomove` [1].
[1] https://github.com/KSubedi/gomove
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
--tz flag sets timezone inside container
Can be set to IANA timezone as well as `local` to match host machine
Signed-off-by: Ashley Cui <acui@redhat.com>
We have a flag, --syslog, for telling logrus to log to syslog as
well as to the terminal. Previously, this flag also set the exit
command for containers to use `--syslog` (otherwise all output
from exit commands is lost). I attempted to replicate this with
Podman v2.0, but quickly ran into circular import hell (the flag
is defined in cmd/podman, I needed it in cmd/podman/containers,
cmd/podman imports cmd/podman/containers already, etc). Instead,
let's just set the syslog flag automatically on
`--log-level=debug` so we log exit commands automatically when
debug-level logs are requested. This is consistent with Conmon
and seems to make sense.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
We initially believed that implementing this required support for
restarting containers after reboot, but this is not the case.
The unless-stopped restart policy acts identically to the always
restart policy except in cases related to reboot (which we do not
support yet), but it does not require that support for us to
implement it.
Changes themselves are quite simple, we need a new restart policy
constant, we need to remove existing checks that block creation
of containers when unless-stopped was used, and we need to update
the manpages.
Fixes#6508
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
These were part of Podman v1.9, but were lost in the transition
to using Specgen to create containers. Most resource limits are
checked via the sysinfo package to ensure they are safe to use
(the cgroup is mounted, kernel support is present, etc) and
removed if not safe. Further, bounds checks are performed to
ensure that values are valid.
Ensure these warnings are printed client-side when they occur.
This part is a little bit gross, as it happens in pkg/infra and
not cmd/podman, which is largely down to how we implemented
`podman run` - all the work is done in pkg/infra and it returns
only once the container has exited, and we need warnings to print
*before* the container runs. The solution here, while inelegant,
avoid the need to extensively refactor our handling of run.
Should fix blkio-limit warnings that were identified by the FCOS
test suite.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Systemd enablement has to happen on the server side, since we need
check if the image is running systemd.
Also need to make sure user setting the StopSignal is not overriden on the
server side. But if not set and using systemd, we set it correctly.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
When we moved to the new Namespace types in Specgen, we made a
distinction between taking a namespace from a pod, and taking it
from another container. Due to this new distinction, some code
that previously worked for both `--pod=$ID` and
`--uts=container:$ID` has accidentally become conditional on only
the latter case. This happened for Hostname - we weren't properly
setting it in cases where the container joined a pod.
Fortunately, this is an easy fix once we know to check the
condition.
Also, ensure that `podman pod inspect` actually prints hostname.
Fixes#6494
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
The biggest obstacle here was cleanup - we needed a way to remove
detached exec sessions after they exited, but there's no way to
tell if an exec session will be attached or detached when it's
created, and that's when we must add the exit command that would
do the removal. The solution was adding a delay to the exit
command (5 minutes), which gives sufficient time for attached
exec sessions to retrieve the exit code of the session after it
exits, but still guarantees that they will be removed, even for
detached sessions. This requires Conmon 2.0.17, which has the new
`--exit-delay` flag.
As part of the exit command rework, we can drop the hack we were
using to clean up exec sessions (remove them as part of inspect).
This is a lot cleaner, and I'm a lot happier about it.
Otherwise, this is just plumbing - we need a bindings call for
detached exec, and that needed to be added to the tunnel mode
backend for entities.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
The cleanup command creation logic is made public as part of this
and wired such that we can call it both within SpecGen (to make
container exit commands) and from the ABI detached exec handler.
Exit commands are presently only used for detached exec, but
theoretically could be turned on for all exec sessions if we
wanted (I'm declining to do this because of potential overhead).
I also forgot to copy the exit command from the exec config into
the ExecOptions struct used by the OCI runtime, so it was not
being added.
There are also two significant bugfixes for exec in here. One is
for updating the status of running exec sessions - this was
always failing as I had coded it to remove the exit file *before*
reading it, instead of after (oops). The second was that removing
a running exec session would always fail because I inverted the
check to see if it was running.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
To try and identify differences between Podman v1.9 and master,
I ran a series of `podman run` commands with various flags
through each, then inspecting the resulting containers and diffed
the inspect JSON between each. This identified a number of issues
which are fixed in this PR.
In order of discovery:
- Podman v2 gave short names for images, where Podman v1 gave the
fully-qualified name. Simple enough fix (get image tags and use
the first one if they're available)
- The --restart flag was not being parsed correctly when a number
of retries was specified. Parsing has been corrected.
- The -m flag was not setting the swap limit (simple fix to set
swap in that case if it's not explicitly set by the user)
- The --cpus flag was completely nonfunctional (wired in its
logic)
Tests have been added for all of these to catch future
regressions.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
As part of this, make a major change to the type we use to
represent port mappings in SpecGen (from using existing OCICNI
structs to using our own custom one). This struct has the
advantage of supporting ranges, massively reducing traffic over
the wire for Podman commands using them (for example, the
`podman run -p 5000-6000` command will now send only one struct
instead of 1000). This struct also allows us to easily validate
which ports are in use, and which are not, which is necessary for
--expose.
Once we have parsed the ports from the new struct, we can produce
an accurate map including all currently requested ports, and use
that to determine what ports need to be exposed (some requested
exposed ports may already be included in a mapping from --publish
and will be ignored) and what open ports on the host we can map
them to.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
We should not be overwriting the Specgen's Command and Entrypoint
when building the final command to pass in the OCI spec. Both of
these will be provided to Libpod for use in `podman inspect` and
committing containers, and both must be set to the user's input,
not overwritten by the image if unset.
Fix this by moving command generation into OCI spec generation
and not modifying the SpecGenerator when we do so.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
This should complete Podmanv2's support for volume-related flags.
Most code was sourced from the old pkg/spec implementation with
modifications to account for the split between frontend flags
(volume, mount, tmpfs) and the backend flags implemented here.
Also enables tests for podman run with volumes
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Namespaces have now been changed to properly handle all cases.
Spec handling code for namespaces was consolidated in a single
function.
Still missing:
- Image ports
- Pod namespaces likely still broken in Podmanv2
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
create a container in podmanv2 using specgen approach. this is the core implementation and still has quite a bit of code commented out specifically around volumes, devices, and namespaces. need contributions from smes on these parts.
Signed-off-by: Brent Baude <bbaude@redhat.com>
