This also moves Runtime methods ConnectContainerToNetwork and
DisconnectContainerFromNetwork as well as support functions
getFreeInterfaceName and normalizeNetworkName.
[NO NEW TESTS NEEDED]
Signed-off-by: Doug Rabson <dfr@rabson.org>
libpod: Move (Connect|Disconnect)Container(To|From)Network and normalizeNetworkName to networking_common.go
[NO NEW TESTS NEEDED]
Signed-off-by: Doug Rabson <dfr@rabson.org>
Podman adds an Error: to every error message. So starting an error
message with "error" ends up being reported to the user as
Error: error ...
This patch removes the stutter.
Also ioutil.ReadFile errors report the Path, so wrapping the err message
with the path causes a stutter.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Compat: Treat already attached networks as a no-op
Applies only to containers in created state. Maintain error in running state.
Co-authored-by: Alessandro Rossi <al.rossi87@gmail.com>
Co-authored-by: Brent Baude <bbaude@redhat.com>
Co-authored-by: Jason T. Greene <jason.greene@redhat.com>
Signed-off-by: Alessandro Rossi <al.rossi87@gmail.com>
Signed-off-by: Jason T. Greene <jason.greene@redhat.com>
We now use the golang error wrapping format specifier `%w` instead of
the deprecated github.com/pkg/errors package.
[NO NEW TESTS NEEDED]
Signed-off-by: Sascha Grunert <sgrunert@redhat.com>
* Replace "setup", "lookup", "cleanup", "backup" with
"set up", "look up", "clean up", "back up"
when used as verbs. Replace also variations of those.
* Improve language in a few places.
Signed-off-by: Erik Sjölund <erik.sjolund@gmail.com>
Podman and Buildah should use the same code the generate the resolv.conf
file. This mostly moved the podman code into c/common and created a
better API for it so buildah can use it as well.
[NO NEW TESTS NEEDED] All existing tests should continue to pass.
Fixes#13599 (There is no way to test this in CI without breaking the
hosts resolv.conf)
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
Hardcoding the interface name is a bad idea. We have no control over the
actual interface name since the user can change it.
The correct thing is to read them from the network status. Since the
contianer can have more than one interface we have to add the RX/TX
values. The other values are currently not used.
For podman 5.0 we should change it so that the API can return the
statistics per interface and the client should sum the TX/RX for the
command output. This is what docker is doing.
Fixes#13824
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
The errcheck linter makes sure that errors are always check and not
ignored by accident. It spotted a lot of unchecked errors, mostly in the
tests but also some real problem in the code.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
The linter ensures a common code style.
- use switch/case instead of else if
- use if instead of switch/case for single case statement
- add space between comment and text
- detect the use of defer with os.Exit()
- use short form var += "..." instead of var = var + "..."
- detect problems with append()
```
newSlice := append(orgSlice, val)
```
This could lead to nasty bugs because the orgSlice will be changed in
place if it has enough capacity too hold the new elements. Thus we
newSlice might not be a copy.
Of course most of the changes are just cosmetic and do not cause any
logic errors but I think it is a good idea to enforce a common style.
This should help maintainability.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
Based on WSL2 9p support: remaps windows paths to /mnt/<drive> locations for
both podman and Docker API clients.
Signed-off-by: Jason T. Greene <jason.greene@redhat.com>
SHA-1 is prone to collisions.
This will likely break connectivity between old containers started
before update and containers started after update. It will also fail to
cleanup old netns. A reboot will fix this, so a reboot is recommended
after update.
[NO NEW TESTS NEEDED]
Signed-off-by: Lokesh Mandvekar <lsm5@fedoraproject.org>
When we connect or disconnect from a network we also have to update
/etc/hosts to ensure we only have valid entries in there.
This also fixes problems with docker-compose since this makes use of
network connect/disconnect.
Fixes#12533
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
When you run podman on a non systemd system we should not try to move the
process under a new systemd scope.
[NO NEW TESTS NEEDED]
Ref #13703
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
When podman gets an error it prints out "Error: " before
printing the error string. If the error message starts with
error, we end up with
Error: error ...
This PR Removes all of these stutters.
logrus.Error() also prints out that this is an error, so no need for the
error stutter.
[NO NEW TESTS NEEDED]
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This primarily served to protect us against shutting down the
Libpod runtime while operations (like creating a container) were
happening. However, it was very inconsistently implemented (a lot
of our longer-lived functions, like pulling images, just didn't
implement it at all...) and I'm not sure how much we really care
about this very-specific error case?
Removing it also removes a lot of potential deadlocks, which is
nice.
[NO NEW TESTS NEEDED]
Signed-off-by: Matthew Heon <mheon@redhat.com>
The `podman network connect` and `podman network disconnect`
commands give containers access to different networks than the
ones they were created with; these networks can also have DNS
servers associated with them. Until now, however, we did not
modify resolv.conf as network membership changed.
With this PR, `podman network connect` will add any new
nameservers supported by the new network to the container's
/etc/resolv.conf, and `podman network disconnect` command will do
the opposite, removing the network's nameservers from
`/etc/resolv.conf`.
Fixes#9603
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
When running podman inside systemd user units, it is possible that
systemd kills the rootless netns slirp4netns process because it was
started in the default unit cgroup. When the unit is stopped all
processes in that cgroup are killed. Since the slirp4netns process is
run once for all containers it should not be killed. To make sure
systemd will not kill the process we move it to the user.slice.
Fixes#13153
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
by default slirp4netns uses the tap0 device. When slirp4netns is
used, use that device by default instead of eth0.
Closes: https://github.com/containers/podman/issues/11695
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
We should not check if the network supports dns when we create a
container with network aliases. This could be the case for containers
created by docker-compose for example if the dnsname plugin is not
installed or the user uses a macvlan config where we do not support dns.
Fixes#12972
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
The libpod/network packages were moved to c/common so that buildah can
use it as well. To prevent duplication use it in podman as well and
remove it from here.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
Network connect now supports setting a static ipv4, ipv6 and mac address
for the container network. The options are added to the cli and api.
Fixes#9883
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
The new network db structure stores everything in the networks bucket.
Previously some network settings were not written the the network bucket
and only stored in the container config.
Instead of the old format which used the container ID as value in the
networks buckets we now use the PerNetworkoptions struct there.
To migrate existing users we use the state.GetNetworks() function. If it
fails to read the new format it will automatically migrate the old
config format to the new one. This is allows a flawless migration path.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
We need to follow all symlinks in the /etc/resolv.conf path. Currently
we would only check the last file but it is possible that any directory
before that is also a link.
Unfortunately this code is very hard to maintain and not well tested. I
will try to come up with a unit test when I have more time. I think we
could utilize some for of chroot for this. For now we are stucked with
the default setup in the fedora/ubunutu test VMs.
[NO NEW TESTS NEEDED]
Fixes#12461
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
rootlessNetNS.Cleanup() has an issue with how it detects if cleanup
is needed, reading the container state is not good ebough because
containers are first stopped and than cleanup will be called. So at one
time two containers could wait for cleanup but the second one will fail
because the first one triggered already the cleanup thus making rootless
netns unavailable for the second container resulting in an teardown
error. Instead of checking the container state we need to check the
netns state.
Secondly, podman unshare --rootless-netns should not do the cleanup.
This causes more issues than it is worth fixing. Users also might want
to use this to setup the namespace in a special way. If unshare also
cleans this up right away we cannot do this.
[NO NEW TESTS NEEDED]
Fixes#12459
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
The netns cleanup code is checking if there are running containers, this
can fail if you run several libpod instances with diffrent root/runroot.
To fix it we use one netns for each libpod instances. To prevent name
conflicts we use a hash from the static dir as part of the name.
Previously this worked because we would use the CNI files to check if
the netns was still in use. but this is no longer possible with netavark.
[NO NEW TESTS NEEDED]
Fixes#12306
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
structure.
Resolves a discrepancy between the types used in inspect for docker and podman.
This causes a panic when using the docker client against podman when the
secondary IP fields in the `NetworkSettings` inspect field are populated.
Fixes containers#12165
Signed-off-by: Federico Gimenez <fgimenez@redhat.com>
Some field names are confusing. Change them so that they make more sense
to the reader.
Since these fields are only in the main branch we can safely rename them
without worrying about backwards compatibility.
Note we have to change the field names in netavark too.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
This commits adds port forwarding logic directly into podman. The
podman-machine cni plugin is no longer needed.
The following new features are supported:
- works with cni, netavark and slirp4netns
- ports can use the hostIP to bind instead of hard coding 0.0.0.0
- gvproxy no longer listens on 0.0.0.0:7777 (requires a new gvproxy
version)
- support the udp protocol
With this we no longer need podman-machine-cni and should remove it from
the packaging. There is also a change to make sure we are backwards
compatible with old config which include this plugin.
Fixes#11528Fixes#11728
[NO NEW TESTS NEEDED] We have no podman machine test at the moment.
Please test this manually on your system.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
A rootless container created with a custom userns and forwarded ports
did not work. I refactored the network setup to make the setup logic
more clear.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
Since we want to use the rootless cni ns also for netavark we should
pick a more generic name. The name is now "rootless network namespace"
or short "rootless netns".
The rename might cause some issues after the update but when the
all containers are restarted or the host is rebooted it should work
correctly.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
We should mount the full runtime directory into the namespace instead of
just the netns dir. This allows more use cases.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
