Are you able to put them in a pod/create them in the same network namespace? Then you could have the containers talk over localhost and not have to worry about finding the IP.
You can also specify a static ip with --ip on container creation for the container that needs to be pinged, and then use that IP for the other container. That could "fix" the container IP, and allow them to communicate that way rather than name.

Do either of these options help? podman currently doesn't do intra-container network resolution by name (as you've noticed).


On Fri, Aug 2, 2019 at 5:56 PM Uwe Reh <> wrote:
UPPS, Sorry

just after sending my question, I found a similar one from  Christoffer
Reijer "Setting up 2 containers", 26 Juni 2019

But my problem is slightly different.
One of the containers is 'optimized' for Docker and uses fixed container
names to call local services. (Not nice but real world)

So the hint from Brent Baude does not really help.
> When two containers belong to the same pod, they share the same network space. Therefore, there is no need for name resolution. They will both respond to localhost.
It would be hard to patch all configured container names with "localhost".

Any other hints?

Am 02.08.19 um 23:29 schrieb Uwe Reh:
> Hi,
> I'm trying to migrate a small set of containers from Docker to Podman.
> Obviously I missed one or two links, because I can't get the ensemble
> run, like I'm used to.
> *Problem:
> Having two containers, C1 and C2.
> Running on Docker, the containers can establish bridged IP4 connections
> on each other byIp and byName. With podman it works fine with IP's
> (found with podman inspect) but I wasn't able to resolve any name.
>> podman exec -it C1 ping
>>    PING ( 56 data bytes
>>    64 bytes from seq=0 ttl=64 time=0.105 ms podman exec -it
>> C1 ping C2
>>    ping: bad address 'C2'
> *Question:
> What have I missed to have dynamic DNS service for the containers inside
> the bridge or slirp4netns?
> *Runtime:
>> podman version
>> Version:            1.4.4
>> RemoteAPI Version:  1
>> Go Version:         go1.12.6
>> OS/Arch:            linux/amd64
> on
>> cat /etc/os-release NAME="openSUSE Leap"
>> VERSION="15.0"
>> ID="opensuse-leap"
> Uwe
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