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Techno Tim
52c086d638
- roles/k3s_server_post/templates/metallb.crs.j2: render spec.interfaces in the L2Advertisement when metal_lb_interfaces is a non-empty list, so MetalLB only announces on the configured interfaces. Empty list (default) keeps announcing on all interfaces, preserving existing behavior. - roles/k3s_server_post/defaults/main.yml: add metal_lb_interfaces: [] default - roles/k3s_server_post/meta/main.yml: add metal_lb_interfaces argument_spec - inventory/sample/group_vars/all.yml: document the new sample variable - .github/scripts/test-metallb-interfaces.py: regression test rendering the template for empty/single/multiple interfaces and confirming the BGP path is unaffected - .pre-commit-config.yaml: wire the new test into pre-commit Co-authored-by: Leo <leo@kuboschek.me>
89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
#!/usr/bin/env python3
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"""Regression test for the MetalLB L2Advertisement interfaces.
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`metal_lb_interfaces` restricts which network interfaces MetalLB announces
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load balancer IPs on in layer2 mode. When the list is non-empty, the
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L2Advertisement in roles/k3s_server_post/templates/metallb.crs.j2 must render
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a `spec.interfaces` block; when it is empty (the default), no spec is rendered
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so MetalLB announces on all interfaces.
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This renders the template and asserts both cases plus the BGP path (which must
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not be affected by the L2 interfaces variable).
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"""
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from __future__ import print_function
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import os
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import subprocess
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from jinja2 import Environment, FileSystemLoader, StrictUndefined
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def repo_root():
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return subprocess.check_output(
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["git", "rev-parse", "--show-toplevel"], text=True
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).strip()
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def fail(message):
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raise SystemExit("MetalLB interfaces test failed: " + message)
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def render(env, extra_vars):
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base_vars = {
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"metal_lb_mode": "layer2",
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"metal_lb_ip_range": "192.168.30.80-192.168.30.90",
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}
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base_vars.update(extra_vars)
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template = env.get_template("metallb.crs.j2")
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return template.render(**base_vars)
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def main():
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root = repo_root()
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template_dir = os.path.join(
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root, "roles", "k3s_server_post", "templates"
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)
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env = Environment(
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loader=FileSystemLoader(template_dir), undefined=StrictUndefined
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)
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# Empty list (default): no spec.interfaces in the L2Advertisement.
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output = render(env, {"metal_lb_interfaces": []})
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if "spec:\n interfaces:" in output:
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fail("spec.interfaces rendered with an empty metal_lb_interfaces")
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if "kind: L2Advertisement" not in output:
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fail("L2Advertisement missing in layer2 mode")
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# Single interface.
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output = render(env, {"metal_lb_interfaces": ["eth1"]})
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if "spec:\n interfaces:\n - eth1" not in output:
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fail("single interface was not rendered in spec.interfaces")
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# Multiple interfaces.
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output = render(env, {"metal_lb_interfaces": ["eth1", "eth2"]})
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if "spec:\n interfaces:\n - eth1\n - eth2" not in output:
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fail("multiple interfaces were not rendered in spec.interfaces")
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# BGP mode must not emit an L2Advertisement spec at all.
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output = render(
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env,
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{
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"metal_lb_mode": "bgp",
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"metal_lb_interfaces": ["eth1"],
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"metal_lb_bgp_my_asn": "64513",
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"metal_lb_bgp_peer_asn": "64512",
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"metal_lb_bgp_peer_address": "192.168.30.1",
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},
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)
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if "kind: L2Advertisement" in output:
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fail("L2Advertisement rendered in bgp mode")
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if "interfaces:" in output:
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fail("interfaces rendered in bgp mode")
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print("MetalLB interfaces regression test passed")
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if __name__ == "__main__":
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main()
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