Specify network in kube file

[imperialguy]

Say I do the following:

podman network create sample
podman pod create --name p1
podman run -d --rm -it --name c1 --pod p1 --network sample docker.io/alpine:latest
podman run -d --rm -it --name c2 --pod p1 --network sample docker.io/alpine:latest
podman generate kube p1

Here's the yaml file it generates.

# Save the output of this file and use kubectl create -f to import
# it into Kubernetes.
#
# Created with podman-3.4.2
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: "2022-04-13T12:05:19Z"
  labels:
    app: p1
  name: p1
spec:
  containers:
  - image: docker.io/library/alpine:latest
    name: c1
    resources: {}
    securityContext:
      capabilities:
        drop:
        - CAP_MKNOD
        - CAP_AUDIT_WRITE
    stdin: true
    tty: true
  - image: docker.io/library/alpine:latest
    name: c2
    resources: {}
    securityContext:
      capabilities:
        drop:
        - CAP_MKNOD
        - CAP_AUDIT_WRITE
    stdin: true
    tty: true
  restartPolicy: Never
status: {}

The problem is the generated yaml file does not include the network name. How do I add the network name to the generated kube yaml file?

[Luap99]

It is not possible to use networks with the k8s yaml format yet: #12965

[fpoirotte]

Some k8s plugins allow that, e.g. :

• for the default network interface, the Calico CNI plugin allows the interface's IP address to be customized using the cni.projectcalico.org/ipAddrs annotation, and that's all
• for additional network interfaces, the Multus CNI plugin allows complete control other the configuration through the k8s.v1.cni.cncf.io/networks annotation. From my personal experience, this maps quite nicely to podman's --network option.

IMO, the main problem is that there is no standard way to define this configuration and the level of customization is highly dependent on the CNI plugin. Plus, not all features in podman can be represented using existing annotations (e.g. slirp4netns

Maybe podman should define its own annotation for that purpose...