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nixos/k3s: use dynamic networking in multi node test

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The dynamic setup requires less network configuration and allows to use
features of the nixos testing driver, e.g. port forwarding and SSH
access to nodes in interactive mode.
This commit is contained in:
Robert Rose 2025-01-21 17:37:05 +01:00
parent 71c36b0de0
commit c256d7b5ec
1 changed files with 14 additions and 35 deletions
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49
nixos/tests/k3s/multi-node.nix
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@ -60,7 +60,7 @@ import ../make-test-python.nix (
nodes = {
server =
{ pkgs, ... }:
{ nodes, pkgs, ... }:
{
environment.systemPackages = with pkgs; [
gzip
@ -83,8 +83,12 @@ import ../make-test-python.nix (
"--disable metrics-server"
"--disable servicelb"
"--disable traefik"
"--node-ip 192.168.1.1"
"--pause-image test.local/pause:local"
"--node-ip ${nodes.server.networking.primaryIPAddress}"
# The interface selection logic of flannel would normally use eth0, as the nixos
# testing driver sets a default route via dev eth0. However, in test setups we
# have to use eth1 for inter-node communication.
"--flannel-iface eth1"
];
};
networking.firewall.allowedTCPPorts = [
@ -93,19 +97,10 @@ import ../make-test-python.nix (
6443
];
networking.firewall.allowedUDPPorts = [ 8472 ];
networking.firewall.trustedInterfaces = [ "flannel.1" ];
networking.useDHCP = false;
networking.defaultGateway = "192.168.1.1";
networking.interfaces.eth1.ipv4.addresses = pkgs.lib.mkForce [
{
address = "192.168.1.1";
prefixLength = 24;
}
];
};
server2 =
{ pkgs, ... }:
{ nodes, pkgs, ... }:
{
environment.systemPackages = with pkgs; [
gzip
@ -119,7 +114,7 @@ import ../make-test-python.nix (
enable = true;
package = k3s;
images = [ pauseImage ];
serverAddr = "https://192.168.1.1:6443";
serverAddr = "https://${nodes.server.networking.primaryIPAddress}:6443";
clusterInit = false;
extraFlags = [
"--disable coredns"
@ -127,8 +122,9 @@ import ../make-test-python.nix (
"--disable metrics-server"
"--disable servicelb"
"--disable traefik"
"--node-ip 192.168.1.3"
"--pause-image test.local/pause:local"
"--node-ip ${nodes.server2.networking.primaryIPAddress}"
"--flannel-iface eth1"
];
};
networking.firewall.allowedTCPPorts = [
@ -137,19 +133,10 @@ import ../make-test-python.nix (
6443
];
networking.firewall.allowedUDPPorts = [ 8472 ];
networking.firewall.trustedInterfaces = [ "flannel.1" ];
networking.useDHCP = false;
networking.defaultGateway = "192.168.1.3";
networking.interfaces.eth1.ipv4.addresses = pkgs.lib.mkForce [
{
address = "192.168.1.3";
prefixLength = 24;
}
];
};
agent =
{ pkgs, ... }:
{ nodes, pkgs, ... }:
{
virtualisation.memorySize = 1024;
virtualisation.diskSize = 2048;
@ -159,23 +146,15 @@ import ../make-test-python.nix (
role = "agent";
package = k3s;
images = [ pauseImage ];
serverAddr = "https://192.168.1.3:6443";
serverAddr = "https://${nodes.server2.networking.primaryIPAddress}:6443";
extraFlags = [
"--pause-image test.local/pause:local"
"--node-ip 192.168.1.2"
"--node-ip ${nodes.agent.networking.primaryIPAddress}"
"--flannel-iface eth1"
];
};
networking.firewall.allowedTCPPorts = [ 6443 ];
networking.firewall.allowedUDPPorts = [ 8472 ];
networking.firewall.trustedInterfaces = [ "flannel.1" ];
networking.useDHCP = false;
networking.defaultGateway = "192.168.1.2";
networking.interfaces.eth1.ipv4.addresses = pkgs.lib.mkForce [
{
address = "192.168.1.2";
prefixLength = 24;
}
];
};
};