[bborbe]

What

• nodes/hm.sun.py: enable -A FORWARD -j ACCEPT. bundles/kvm-host/files/bridge.conf sets bridge-nf-call-iptables = 1 and bundles/iptables/files/rules.v4 defaults :FORWARD DROP, so traffic bridged onto br0 was dropped and libvirt VMs on sun were unreachable. hm.nuke.py already carries the same rule.
• nodes/hm.sun-k3s-master-0.py, nodes/hm.sun-k3s-worker-0.py: new nodes for the sun k3s cluster, copied from hm.nuke-k3s-prod-{master,worker}-0.py with address 192.168.30.10 / .11, gateway 192.168.30.1, k3s.network 192.168.30.0/24, and the openvpn-client block removed.

Observed

• make precommit (bw test --ignore-missing-faults) passes.
• The FORWARD rule was applied to hm.sun with bw apply hm.sun -o file:/etc/iptables/rules.v4, then iptables-restore and the docker reconcile run by hand (-o skips triggers). iptables -S FORWARD now ends with -A FORWARD -j ACCEPT.
• Both nodes were applied with bw apply; ssh bborbe@192.168.30.10 hostname returns sun-k3s-master-0 and ssh bborbe@192.168.30.11 hostname returns sun-k3s-worker-0.

Known gap, not fixed here

On both new nodes bw verify reports 24 bad items, all one cause: the apt bundle repoints the sources to ftp.uni-stuttgart.de but no apt-get update runs before installs, so apt finds no candidate (iotop, make, iptables-persistent, monit, ...). As a result the nodes' iptables rules were never written. Re-applying needs coordination with the k3s install now running on them, since the iptables bundle replaces the whole filter table.

Test plan

• bw verify hm.sun shows the iptables file in sync
• host reboot of hm.sun keeps -A FORWARD -j ACCEPT (netfilter-persistent is installed and enabled there)

[ben-s-pull-request-reviewer]

The review is complete. Let me consolidate findings.

Changes reviewed:

1. nodes/hm.sun.py — Enables -A FORWARD -j ACCEPT on the sun host, required for KVM bridge networking to function.

2. nodes/hm.sun-k3s-master-0.py — New k3s master node at 192.168.30.10/24. Follows the established pattern from hm.nuke-k3s-prod-master-0.py (including the node-cidr-mask-size=22 fix), with openvpn-client deliberately omitted since sun is the gateway itself.

3. nodes/hm.sun-k3s-worker-0.py — New k3s worker node at 192.168.30.11/24. Same pattern as hm.nuke-k3s-prod-worker-0.py with agent: True.

The 192.168.30.0/24 subnet matches sun's bridge (br0 at 192.168.30.2/24), so the k3s nodes will be on the same L2 network as their gateway — correct topology.

The plan notes the apt/apt-get update gap is pre-existing debt in the base templates, not introduced by this PR.

{
  "verdict": "approve",
  "summary": "PR adds two new k3s nodes (master and worker) on the 192.168.30.0/24 subnet behind sun's bridge, and enables FORWARD on sun to allow bridge traffic. The node configurations match established nuke-k3s patterns with the node-cidr-mask-size=22 fix applied to the master. No correctness or security issues found.",
  "comments": [],
  "concerns_addressed": [
    {
      "concern": "correctness: apt/apt-get update gap in nodes/hm.sun.py",
      "disposition": "not-an-issue",
      "detail": "Pre-existing debt in the base templates, not introduced by this PR. The FORWARD rule change is a one-line diff with no apt interaction."
    },
    {
      "concern": "correctness: apt/apt-get update gap in nodes/hm.sun-k3s-master-0.py",
      "disposition": "not-an-issue",
      "detail": "Known gap from copied base template (hm.nuke-k3s-prod-master-0.py); same issue exists in the source. Not introduced by this PR."
    },
    {
      "concern": "correctness: apt/apt-get update gap in nodes/hm.sun-k3s-worker-0.py",
      "disposition": "not-an-issue",
      "detail": "Known gap from copied base template (hm.nuke-k3s-prod-worker-0.py); same issue exists in the source. Not introduced by this PR."
    }
  ]
}