Our users are missing certain warning messages that would
make debugging issues with Podman easier.
For example if you do a podman build with a Containerfile
that contains the SHELL directive, the Derective is silently
ignored.
If you run with the log-level warn you get a warning message explainging
what happened.
$ podman build --no-cache -f /tmp/Containerfile1 /tmp/
STEP 1: FROM ubi8
STEP 2: SHELL ["/bin/bash", "-c"]
STEP 3: COMMIT
--> 7a207be102a
7a207be102aa8993eceb32802e6ceb9d2603ceed9dee0fee341df63e6300882e
$ podman --log-level=warn build --no-cache -f /tmp/Containerfile1 /tmp/
STEP 1: FROM ubi8
STEP 2: SHELL ["/bin/bash", "-c"]
STEP 3: COMMIT
WARN[0000] SHELL is not supported for OCI image format, [/bin/bash -c] will be ignored. Must use `docker` format
--> 7bd96fd25b9
7bd96fd25b9f755d8a045e31187e406cf889dcf3799357ec906e90767613e95f
These messages will no longer be lost, when we default to WARNing level.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This makes things a lot more clear - if we are actually joining a
CNI network, we are guaranteed to get a non-zero length list of
networks.
We do, however, need to know if the network we are joining is the
default network for inspecting containers as it determines how we
populate the response struct. To handle this, add a bool to
indicate that the network listed was the default network, and
only the default network.
Signed-off-by: Matthew Heon <mheon@redhat.com>
Convert the existing network aliases set/remove code to network
connect and disconnect. We can no longer modify aliases for an
existing network, but we can add and remove entire networks. As
part of this, we need to add a new function to retrieve current
aliases the container is connected to (we had a table for this
as of the first aliases PR, but it was not externally exposed).
At the same time, remove all deconflicting logic for aliases.
Docker does absolutely no checks of this nature, and allows two
containers to have the same aliases, aliases that conflict with
container names, etc - it's just left to DNS to return all the
IP addresses, and presumably we round-robin from there? Most
tests for the existing code had to be removed because of this.
Convert all uses of the old container config.Networks field,
which previously included all networks in the container, to use
the new DB table. This ensures we actually get an up-to-date list
of in-use networks. Also, add network aliases to the output of
`podman inspect`.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
When making containers, we want to lock all named volumes we are
adding the container to, to ensure they aren't removed from under
us while we are working. Unfortunately, this code did not account
for a container having the same volume mounted in multiple places
so it could deadlock. Add a map to ensure that we don't lock the
same name more than once to resolve this.
Fixes#8221
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Most of the builtin golang functions like os.Stat and
os.Open report errors including the file system object
path. We should not wrap these errors and put the file path
in a second time, causing stuttering of errors when they
get presented to the user.
This patch tries to cleanup a bunch of these errors.
Signed-off-by: Daniel J Walsh <dwalsh@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>
We do not populate the hostname field with the IP Address
when running within a user namespace.
Fixes https://github.com/containers/podman/issues/7490
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
In case os.Open[File], os.Mkdir[All], ioutil.ReadFile and the like
fails, the error message already contains the file name and the
operation that fails, so there is no need to wrap the error with
something like "open %s failed".
While at it
- replace a few places with os.Open, ioutil.ReadAll with
ioutil.ReadFile.
- replace errors.Wrapf with errors.Wrap for cases where there
are no %-style arguments.
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
when joining an existing container user namespace, read the existing
mappings so the storage can be created with the correct ownership.
Closes: https://github.com/containers/podman/issues/7547
Signed-off-by: Giuseppe Scrivano <giuseppe@scrivano.org>
Usage:
```
$ podman network create foo
$ podman run -d --name web --hostname web --network foo nginx:alpine
$ podman run --rm --network foo alpine wget -O - http://web.dns.podman
Connecting to web.dns.podman (10.88.4.6:80)
...
<h1>Welcome to nginx!</h1>
...
```
See contrib/rootless-cni-infra for the design.
Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
We added code to create a `/etc/passwd` file that we bind-mount
into the container in some cases (most notably,
`--userns=keep-id` containers). This, unfortunately, was not
persistent, so user-added users would be dropped on container
restart. Changing where we store the file should fix this.
Further, we want to ensure that lookups of users in the container
use the right /etc/passwd if we replaced it. There was already
logic to do this, but it only worked for user-added mounts; it's
easy enough to alter it to use our mounts as well.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
This was inspired by https://github.com/cri-o/cri-o/pull/3934 and
much of the logic for it is contained there. However, in brief,
a named return called "err" can cause lots of code confusion and
encourages using the wrong err variable in defer statements,
which can make them work incorrectly. Using a separate name which
is not used elsewhere makes it very clear what the defer should
be doing.
As part of this, remove a large number of named returns that were
not used anywhere. Most of them were once needed, but are no
longer necessary after previous refactors (but were accidentally
retained).
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>
move the chown for newly created volumes after the spec generation so
the correct UID/GID are known.
Closes: https://github.com/containers/libpod/issues/5698
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
specify the mappings in the container configuration to the storage
when creating the container so that the correct mappings can be
configured.
Regression introduced with Podman 2.0.
Closes: https://github.com/containers/libpod/issues/6735
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This came out of a conversation with Valentin about
systemd-managed Podman. He discovered that unit files did not
properly handle cases where Conmon was dead - the ExecStopPost
`podman rm --force` line was not actually removing the container,
but interestingly, adding a `podman cleanup --rm` line would
remove it. Both of these commands do the same thing (minus the
`podman cleanup --rm` command not force-removing running
containers).
Without a running Conmon instance, the container process is still
running (assuming you killed Conmon with SIGKILL and it had no
chance to kill the container it managed), but you can still kill
the container itself with `podman stop` - Conmon is not involved,
only the OCI Runtime. (`podman rm --force` and `podman stop` use
the same code to kill the container). The problem comes when we
want to get the container's exit code - we expect Conmon to make
us an exit file, which it's obviously not going to do, being
dead. The first `podman rm` would fail because of this, but
importantly, it would (after failing to retrieve the exit code
correctly) set container status to Exited, so that the second
`podman cleanup` process would succeed.
To make sure the first `podman rm --force` succeeds, we need to
catch the case where Conmon is already dead, and instead of
waiting for an exit file that will never come, immediately set
the Stopped state and remove an error that can be caught and
handled.
Signed-off-by: Matthew Heon <mheon@redhat.com>
With APIv2, we cannot guarantee that exec sessions will be
removed cleanly on exit (Docker does not include an API for
removing exec sessions, instead using a timer-based reaper which
we cannot easily replicate). This is part 1 of a 2-part approach
to providing a solution to this. This ensures that exec sessions
will be reaped, at the very least, on container restart, which
takes care of any that were not properly removed during the run
of a container.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Some runtimes (e.g. Kata containers) seem to object to having us
unmount storage before the container is removed from the runtime.
This is an easy fix (change the order of operations in cleanup)
and seems to make more sense than the way we were doing things.
Signed-off-by: Matthew Heon <mheon@redhat.com>
In order to better support kata containers and systemd containers
container-selinux has added new types. Podman should execute the
container with an SELinux process label to match the container type.
Traditional Container process : container_t
KVM Container Process: containre_kvm_t
PID 1 Init process: container_init_t
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
We previously attempted to work within CNI to do this, without
success. So let's do it manually, instead. We know where the
files should live, so we can remove them ourselves instead. This
solves issues around sudden reboots where containers do not have
time to fully tear themselves down, and leave IP address
allocations which, for various reasons, are not stored in tmpfs
and persist through reboot.
Fixes#5433
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
As part of the rework of exec sessions, we need to address them
independently of containers. In the new API, we need to be able
to fetch them by their ID, regardless of what container they are
associated with. Unfortunately, our existing exec sessions are
tied to individual containers; there's no way to tell what
container a session belongs to and retrieve it without getting
every exec session for every container.
This adds a pointer to the container an exec session is
associated with to the database. The sessions themselves are
still stored in the container.
Exec-related APIs have been restructured to work with the new
database representation. The originally monolithic API has been
split into a number of smaller calls to allow more fine-grained
control of lifecycle. Support for legacy exec sessions has been
retained, but in a deprecated fashion; we should remove this in
a few releases.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Before, we were getting the exit code from the file, in which we waited an arbitrary amount of time (5 seconds) for the file, and segfaulted if we didn't find it. instead, we should be a bit more certain conmon has sent the exit code. Luckily, it sends the exit code along the sync pipe fd, so we can read it from there
Adapt the ExecContainer interface to pass along a channel to get the pid and exit code from conmon, to be able to read both from the pipe
Signed-off-by: Peter Hunt <pehunt@redhat.com>
We can easily tell if we're going to deadlock by comparing lock
IDs before actually taking the lock. Add a few checks for this in
common places where deadlocks might occur.
This does not yet cover pod operations, where detection is more
difficult (and costly) due to the number of locks being involved
being higher than 2.
Also, add some error wrapping on the Podman side, so we can tell
people to use `system renumber` when it occurs.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
when using usernamespace, dnsname respondes from cni were not making it into the containers /etc/resolv.conf because of a timing issue. this corrects that behavior.
Fixes: #5256
Signed-off-by: Brent Baude <bbaude@redhat.com>
When Docker performs a copy up, it first verifies that the volume
being copied into is empty; thus, for volumes that have been
modified elsewhere (e.g. manually copying into then), the copy up
will not be performed at all. Duplicate this behavior in Podman
by checking if the volume is empty before copying.
Furthermore, move setting copyup to false further up. This will
prevent a potential race where copy up could happen more than
once if Podman was killed after some files had been copied but
before the DB was updated.
This resolves CVE-2020-1726.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
This makes restart a bit slower for root containers, but it does
make it more consistent with `podman stop` and `podman start` on
a container. Importantly, `podman restart` will now recreate
firewall rules if they were somehow purged.
Fixes#5051
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
`gocritic` is a powerful linter that helps in preventing certain kinds
of errors as well as enforcing a coding style.
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
Josh Soref
Daniel J Walsh
OpenShift Merge Robot
Matthew Heon
Matthew Heon
Valentin Rothberg
Kir Kolyshkin
Giuseppe Scrivano
Akihiro Suda
zhangguanzhang
Giuseppe Scrivano
Qi Wang
Joseph Gooch
Brent Baude
Peter Hunt