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67 lines
1.8 KiB
Nix
67 lines
1.8 KiB
Nix
import ./make-test-python.nix ({ pkgs, lib, ...} :
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let
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addrShared = "192.168.0.1";
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addrHostA = "192.168.0.10";
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addrHostB = "192.168.0.11";
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mkUcarpHost = addr: { config, pkgs, lib, ... }: {
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networking.interfaces.eth1.ipv4.addresses = lib.mkForce [
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{ address = addr; prefixLength = 24; }
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];
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networking.ucarp = {
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enable = true;
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interface = "eth1";
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srcIp = addr;
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vhId = 1;
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passwordFile = "${pkgs.writeText "ucarp-pass" "secure"}";
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addr = addrShared;
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upscript = pkgs.writeScript "upscript" ''
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#!/bin/sh
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${pkgs.iproute2}/bin/ip addr add "$2"/24 dev "$1"
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'';
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downscript = pkgs.writeScript "downscript" ''
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#!/bin/sh
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${pkgs.iproute2}/bin/ip addr del "$2"/24 dev "$1"
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'';
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};
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};
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in {
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name = "ucarp";
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meta.maintainers = with lib.maintainers; [ oxzi ];
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nodes = {
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hostA = mkUcarpHost addrHostA;
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hostB = mkUcarpHost addrHostB;
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};
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testScript = ''
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def is_master(host):
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ipOutput = host.succeed("ip addr show dev eth1")
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return "inet ${addrShared}/24" in ipOutput
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start_all()
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# First, let both hosts start and let a master node be selected
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for host, peer in [(hostA, "${addrHostB}"), (hostB, "${addrHostA}")]:
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host.wait_for_unit("ucarp.service")
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host.succeed(f"ping -c 1 {peer}")
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hostA.sleep(5)
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hostA_master, hostB_master = is_master(hostA), is_master(hostB)
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assert hostA_master != hostB_master, "only one master node is allowed"
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master_host = hostA if hostA_master else hostB
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backup_host = hostB if hostA_master else hostA
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# Let's crash the master host and let the backup take over
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master_host.crash()
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backup_host.sleep(5)
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assert is_master(backup_host), "backup did not take over"
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'';
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})
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