import ../make-test-python.nix ({ pkgs, lib, ... }: let imageEnv = pkgs.buildEnv { name = "k3s-pause-image-env"; paths = with pkgs; [ tini bashInteractive coreutils socat ]; }; pauseImage = pkgs.dockerTools.streamLayeredImage { name = "test.local/pause"; tag = "local"; contents = imageEnv; config.Entrypoint = [ "/bin/tini" "--" "/bin/sleep" "inf" ]; }; # A daemonset that responds 'server' on port 8000 networkTestDaemonset = pkgs.writeText "test.yml" '' apiVersion: apps/v1 kind: DaemonSet metadata: name: test labels: name: test spec: selector: matchLabels: name: test template: metadata: labels: name: test spec: containers: - name: test image: test.local/pause:local imagePullPolicy: Never resources: limits: memory: 20Mi command: ["socat", "TCP4-LISTEN:8000,fork", "EXEC:echo server"] ''; tokenFile = pkgs.writeText "token" "p@s$w0rd"; in { name = "k3s-multi-node"; nodes = { server = { pkgs, ... }: { environment.systemPackages = with pkgs; [ gzip jq ]; # k3s uses enough resources the default vm fails. virtualisation.memorySize = 1536; virtualisation.diskSize = 4096; services.k3s = { inherit tokenFile; enable = true; role = "server"; package = pkgs.k3s; clusterInit = true; extraFlags = builtins.toString [ "--disable" "coredns" "--disable" "local-storage" "--disable" "metrics-server" "--disable" "servicelb" "--disable" "traefik" "--node-ip" "192.168.1.1" "--pause-image" "test.local/pause:local" ]; }; networking.firewall.allowedTCPPorts = [ 2379 2380 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, ... }: { environment.systemPackages = with pkgs; [ gzip jq ]; virtualisation.memorySize = 1536; virtualisation.diskSize = 4096; services.k3s = { inherit tokenFile; enable = true; serverAddr = "https://192.168.1.1:6443"; clusterInit = false; extraFlags = builtins.toString [ "--disable" "coredns" "--disable" "local-storage" "--disable" "metrics-server" "--disable" "servicelb" "--disable" "traefik" "--node-ip" "192.168.1.3" "--pause-image" "test.local/pause:local" ]; }; networking.firewall.allowedTCPPorts = [ 2379 2380 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, ... }: { virtualisation.memorySize = 1024; virtualisation.diskSize = 2048; services.k3s = { inherit tokenFile; enable = true; role = "agent"; serverAddr = "https://192.168.1.3:6443"; extraFlags = lib.concatStringsSep " " [ "--pause-image" "test.local/pause:local" "--node-ip" "192.168.1.2" ]; }; 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; } ]; }; }; meta = with pkgs.lib.maintainers; { maintainers = [ euank ]; }; testScript = '' machines = [server, server2, agent] for m in machines: m.start() m.wait_for_unit("k3s") is_aarch64 = "${toString pkgs.stdenv.isAarch64}" == "1" # wait for the agent to show up server.wait_until_succeeds("k3s kubectl get node agent") for m in machines: # Fix-Me: Tests fail for 'aarch64-linux' as: "CONFIG_CGROUP_FREEZER: missing (fail)" if not is_aarch64: m.succeed("k3s check-config") m.succeed( "${pauseImage} | k3s ctr image import -" ) server.succeed("k3s kubectl cluster-info") # Also wait for our service account to show up; it takes a sec server.wait_until_succeeds("k3s kubectl get serviceaccount default") # Now create a pod on each node via a daemonset and verify they can talk to each other. server.succeed("k3s kubectl apply -f ${networkTestDaemonset}") server.wait_until_succeeds(f'[ "$(k3s kubectl get ds test -o json | jq .status.numberReady)" -eq {len(machines)} ]') # Get pod IPs pods = server.succeed("k3s kubectl get po -o json | jq '.items[].metadata.name' -r").splitlines() pod_ips = [server.succeed(f"k3s kubectl get po {name} -o json | jq '.status.podIP' -cr").strip() for name in pods] # Verify each server can ping each pod ip for pod_ip in pod_ips: server.succeed(f"ping -c 1 {pod_ip}") agent.succeed(f"ping -c 1 {pod_ip}") # Verify the pods can talk to each other resp = server.wait_until_succeeds(f"k3s kubectl exec {pods[0]} -- socat TCP:{pod_ips[1]}:8000 -") assert resp.strip() == "server" resp = server.wait_until_succeeds(f"k3s kubectl exec {pods[1]} -- socat TCP:{pod_ips[0]}:8000 -") assert resp.strip() == "server" # Cleanup server.succeed("k3s kubectl delete -f ${networkTestDaemonset}") for m in machines: m.shutdown() ''; })