fix(reproducer): enable IPv6 forwarding for network routing

[pderenda]

IPv6 forwarding was not enabled during premetal provisioning, causing failures in IPv6-enabled scenarios when OCP VMs on IPv6 networks become unreachable with 'no route to host' errors.

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[qodo-code-review]

PR Summary by Qodo

Enable IPv6 forwarding during reproducer network setup

🐞 Bug fix 🕐 Less than 10 minutes

AI Description

• Enable IPv6 forwarding on the reproducer host during network preparation.
• Restore routing to OCP VMs on IPv6 networks that were unreachable with “no route to host.”

Diagram

graph TD
  A["Reproducer setup"] --> B["Host sysctl"] --> C["IPv6 VM routing"]

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High-Level Assessment

Keep the new sysctl task beside the existing IPv4 forwarding task. It uses the role’s established mechanism; a separate sysctl configuration path would add complexity without a clear benefit.

Files changed (1) +6 / -0

Bug fix (1) +6 / -0

prepare_networking.ymlEnable host IPv6 forwarding during network preparation +6/-0

Enable host IPv6 forwarding during network preparation

• Adds an ansible.posix.sysctl task that sets net.ipv6.conf.all.forwarding to 1 in the existing privileged host-configuration block. This allows the reproducer host to forward traffic for IPv6-enabled OCP VM networks.

roles/reproducer/tasks/prepare_networking.yml

[centosinfra-prod-github-app]

Build succeeded (check pipeline).
https://gateway-cloud-softwarefactory.apps.ocp.cloud.ci.centos.org/zuul/t/rdoproject.org/buildset/4e0bc8536989454193f48f3b09d15ee6

✔️ openstack-k8s-operators-content-provider SUCCESS in 2h 53m 23s
✔️ podified-multinode-edpm-deployment-crc SUCCESS in 1h 32m 24s
✔️ podified-multinode-edpm-deployment-crc-centos-10 SUCCESS in 1h 20m 53s
✔️ cifmw-crc-podified-edpm-baremetal SUCCESS in 1h 32m 49s
✔️ cifmw-pod-zuul-files SUCCESS in 4m 21s
✔️ noop SUCCESS in 0s
✔️ cifmw-pod-ansible-test SUCCESS in 8m 26s
✔️ cifmw-pod-pre-commit SUCCESS in 8m 20s
✔️ cifmw-molecule-reproducer SUCCESS in 16m 29s