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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 #11528
Fixes #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>
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To prevent code duplication when creating new network backends move
reusable code into a separate internal package.
This allows all network backends to use the same code as long as they
implement the new NetUtil interface.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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The current implementation of the CNI network interface only loads the
networks on the first call and saves them in a map. This is done to safe
performance and not having to reload all configs every time which will be
costly for many networks.
The problem with this approach is that if a network is created by
another process it will not be picked up by the already running podman
process. This is not a problem for the short lived podman commands but
it is problematic for the podman service.
To make sure we always have the actual networks store the mtime of the
config directory. If it changed since the last read we have to read
again.
Fixes #11828
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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Update CNI so we can match wrapped errors. This should silence ENOENT
warnings when trying to read the cni conflist files.
Fixes #10926
Because CNI v1.0.0 contains breaking changes we have to change some
import paths. Also we cannot update the CNI version used for the
conflist files created by `podman network create` because this would
require at least containernetwork-plugins v1.0.1 and a updated dnsname
plugin. Because this will take a while until it lands in most distros
we should not use this version. So keep using v0.4.0 for now.
The update from checkpoint-restore/checkpointctl is also required to
make sure it no longer uses CNI to read the network status.
[NO TESTS NEEDED]
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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Add support for the ipvlan cni plugin. This allows us to create,
inspect and list ipvlan networks correctly.
Fixes #10478
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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Drivers should return the list of supported network drivers by this
plugin. This is useful for podman info.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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The default network should not be validated against used subnets, we have to ensure
that this network can always be created even when a subnet is already used on the host.
This could happen if you run a container on this net, then the cni interface will be
created on the host and "block" this subnet from being used again.
Therefore the next podman command tries to create the default net again and it would
fail because it thinks the network is used on the host.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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Check that the given subnet does not conflict with existing ones (other
configs or host interfaces).
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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Implement a new network interface to abstract CNI from libpod. The
interface is implemented for the CNI backend but in the future we can
add more backends.
The code is structured in three new packages:
- `libpod/network/types`: contains the interface definition
and the necessary types for it.
- `libpod/network/cni` contains the interface implementation for the CNI
backend.
- `libpod/network/util` a set of utility functions related to
networking.
The CNI package uses ginkgo style unit tests. To test Setup/Teardown the
test must be run as root. Each test will run in their own namespace to
make the test independent from the host environment.
New features with the CNI backend:
- The default network will be created in memory if it does not exists on
disk.
- It can set more than one static IP per container network.
- Networks are loaded once from disk and only if this interface is
used, e.g. for commands such as `podman info` networks are not loaded.
This reduces unnecessary disk IO.
This commit only adds the interface it is not wired into libpod. This
requires a lot of breaking changes which will be done in a followup
commit.
Once this is integrated into libpod the current network code under
`libpod/network` should be removed. Also the dependency on OCICNI
should be dropped.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
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