rootless podman containers can create network using slirp4netns but there is no container to container communication
the workaround I used in podman-compose is that I share a network between containers and all containers talk via pod shared localhost (not to be confused with host localhost) I was able to run this complex stack having: a django web interface Postgres database rabbitmq memcached tasks all linked to gather and non-exported to host except the django web interface https://github.com/muayyad-alsadi/podman-compose/blob/master/examples/awx/docker-compose.yml the trick is like this podman pod create -p 8080:80 --name=mypod --share net podman run --name=db --pod=mypod ... podman run --name=web --pod=mypod --add-host db:127.0.0.1 ... On Thu, May 16, 2019 at 5:31 PM Farkas Levente <lfar...@lfarkas.org> wrote: > On 5/8/19 9:19 PM, Brent Baude wrote: > > On Wed, 2019-05-08 at 09:53 +0200, Farkas Levente wrote: > >> hi, > >> it seems that podman do not support network command. ie. it's not > >> possible to create user defined network. > >> > >> is it possible to create a user defined network somehow? > >> > >> is it possible to define a user defined network is rootless mode? > >> > >> since podman do not support --link how can communicate two container > >> in > >> a podman environment? > >> > >> without this feature is there any other way than --net=host? since > >> currently i can't find any other ways. eg. a db and a service > >> container. > >> > >> thanks in advance. > >> > > > > In order to specific a specific network, you must create that network > > with CNI. These network descriptions are defined in /etc/cni/net.d and > > podman ships a default one. A while back, I created a secondary cni > > network for doing some podman testing. I called the network podman2 and > > the conf file appears as: > > > > { > > "cniVersion": "0.3.0", > > "name": "podman2", > > "plugins": [ > > { > > "type": "bridge", > > "bridge": "cni1", > > "isGateway": true, > > "ipMasq": true, > > "ipam": { > > "type": "host-local", > > "subnet": "10.99.0.0/16", > > "routes": [ > > { "dst": "0.0.0.0/0" } > > ] > > } > > }, > > { > > "type": "portmap", > > "capabilities": { > > "portMappings": true > > } > > } > > ] > > } > > > > The CNI project is outside podman and can be found -> > > > https://github.com/containers/libpod/blob/master/test/e2e/common_test.go#L267 > > you might also want to checkout out their plugins subproject. > > ok. but this means currently there is no alternative for docker network. > what's more currently with podman you must use --net=host. > since there is no user defined network (at least with easy command > line), what's more there is no --link option for podman. so neither of > the docker container communication works with podman. is it true? > > > > -- > Levente "Si vis pacem para bellum!" > >
