The existing logic (Range > 0) always triggered, because range is
guaranteed to be at least 1 (a single port has a range of 1, a
two port range (e.g. 80-81) has a range of 2, and so on). As such
this could cause ports that had a host port assigned to them by
the user to randomly assign one instead.
Fixes#8650Fixes#8651
Signed-off-by: Matthew Heon <mheon@redhat.com>
This fixes the issue that a simple port range should map to a random
port range from the host to the container, if no host port range is
specified. For example this fails without applying the patch:
```
> podman run -it -p 6000-6066 alpine
Error: cannot listen on the TCP port: listen tcp4 :53: bind: address already in use
```
The issue is that only the first port is randomly chosen and all
following in the range start by 0 and increment. This is now fixed by
tracking the ranges and then incrementing the random port if necessary.
Signed-off-by: Sascha Grunert <sgrunert@suse.com>
The initial version of the new port code mistakenly restricted
this, so un-restrict it. We still need to maintain the map of
container ports, unfortunately (need to verify if the port in
question is a duplicate, for example).
Fixes#7062
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
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>
I didn't believe that this was actually legal, but it looks like
it is. And, unlike our previous understanding (host port being
empty means just use container port), empty host port actually
carries the same meaning as `--expose` + `--publish-all` (that
is, assign a random host port to the given container port). This
requires a significant rework of our port handling code to handle
this new case. I don't foresee this being commonly used, so I
optimized having a fixed port number as fast path, which this
random assignment code running after the main port handling code
only if necessary.
Fixes#6806
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>
Matthew Heon
Sascha Grunert
Matthew Heon
Daniel J Walsh
Akihiro Suda
Valentin Rothberg