proxmoxve: explicit static IP configuration

[tormath1]

This costs nothing to append - dracut explodes this 'ip=' into variables¹, and downstream libraries might default to 'dhcp' if the 'autoconf' variable is empty.

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Related to: flatcar/Flatcar#2002, flatcar/scripts#3677

(cc @theoraim)

Footnotes

1. https://github.com/dracutdevs/dracut/blob/5d2bda46f4e75e85445ee4d3bd3f68bf966287b9/modules.d/40network/net-lib.sh#L541 ↩

[gemini-code-assist]

Code Review

This pull request updates the Proxmox VE cloud-config provider to append :::off to the generated ip= kernel arguments for both IPv4 and IPv6 network configurations. Feedback suggests using network::dracut_addr to properly format IPv6 addresses to avoid parsing issues with dracut, and reminds the author to update the corresponding unit tests to match the new kernel argument format.

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[gemini-code-assist]

For IPv6 addresses, dracut's colon-separated parser requires them to be enclosed in square brackets (e.g., [2001:db8::1]) so that the colons in the IPv6 address are not mistaken for field separators. Since you are modifying these lines, please use the helper network::dracut_addr to correctly format the IPv6 addresses.

                                kargs.push(format!(
                                    "ip={}::{}:{}:::off",
                                    network::dracut_addr(&IpAddr::V6(network.ip())),
                                    network::dracut_addr(&gateway.gateway),
                                    network.prefix()
                                ));
                            } else {
                                kargs.push(format!(
                                    "ip={}:::{}:::off",
                                    network::dracut_addr(&IpAddr::V6(network.ip())),
                                    network.prefix()
                                ));
                            }

[gemini-code-assist]

The changes to the kernel arguments format (appending :::off) will cause the existing unit tests in src/providers/proxmoxve/tests.rs to fail, as they still assert the old format without the :::off suffix. Please update test_network_kargs and test_network_kargs_no_gateway in src/providers/proxmoxve/tests.rs to match the new format.