tests: Add infrastructure-test

tests/infrastructure/default.nix

@@ -0,0 +1,132 @@
+{
+  inputs,
+  self,
+  lib,
+  ...
+}:
+{
+  defaults =
+    { nodes, config, ... }:
+    {
+      imports = [ self.nixosModules.default ];
+
+      _module.args.allHosts = nodes |> lib.mapAttrs (_: node: { config = node; });
+
+      users = {
+        mutableUsers = false;
+        users.seb = {
+          isNormalUser = true;
+          password = "seb";
+          extraGroups = [ "wheel" ];
+        };
+      };
+
+      custom = {
+        networking.overlay.networkCidr = lib.mkForce "10.10.10.0/24";
+        services.nebula = {
+          caCertificatePath = ./keys/ca.crt;
+          certificatePath = ./keys/${config.networking.hostName}.crt;
+          privateKeyPath = ./keys/${config.networking.hostName}.key;
+        };
+      };
+
+      services.resolved.dnssec = lib.mkForce "false";
+    };
+
+  node.specialArgs = { inherit inputs self; };
+
+  nodes = {
+    lighthouse = {
+      custom = {
+        networking = {
+          overlay = {
+            address = "10.10.10.1";
+            isLighthouse = true;
+            role = "server";
+          };
+          underlay = {
+            interface = "eth1";
+            cidr = "192.168.0.1/16";
+            isPublic = true;
+          };
+        };
+
+        services.dns.enable = true;
+      };
+    };
+
+    server = {
+      custom = {
+        networking = {
+          overlay = {
+            address = "10.10.10.2";
+            role = "server";
+          };
+          underlay = {
+            interface = "eth1";
+            cidr = "192.168.0.2/16";
+            isPublic = true;
+          };
+        };
+
+        services.sshd.enable = true;
+      };
+
+      users.users.seb.openssh.authorizedKeys.keyFiles = [ ./keys/client-ssh.pub ];
+      environment.etc."ssh-key" = {
+        source = ./keys/server-ssh;
+        mode = "0600";
+      };
+    };
+
+    client = {
+      custom.networking = {
+        overlay = {
+          address = "10.10.10.3";
+          role = "client";
+        };
+        underlay = {
+          interface = "eth1";
+          cidr = "192.168.0.3/16";
+        };
+      };
+
+      users.users.seb.openssh.authorizedKeys.keyFiles = [ ./keys/server-ssh.pub ];
+      environment.etc."ssh-key" = {
+        source = ./keys/client-ssh;
+        mode = "0600";
+      };
+    };
+  };
+
+  testScript =
+    { nodes, ... }:
+    let
+      lighthouseNetCfg = nodes.lighthouse.custom.networking.overlay;
+      serverNetCfg = nodes.server.custom.networking.overlay;
+      clientNetCfg = nodes.client.custom.networking.overlay;
+
+      sshOptions = "-i /etc/ssh-key -o BatchMode=yes -o ConnectTimeout=3 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null";
+    in
+    ''
+      start_all()
+
+      lighthouse.wait_for_unit("${lighthouseNetCfg.systemdUnit}")
+      server.wait_for_unit("${serverNetCfg.systemdUnit}")
+      client.wait_for_unit("${clientNetCfg.systemdUnit}")
+      lighthouse.wait_for_unit("unbound.service")
+      server.wait_for_unit("sshd.service")
+
+      with subtest("Overlay connectivity between nodes"):
+        client.succeed("ping -c 1 ${serverNetCfg.address}")
+        server.succeed("ping -c 1 ${clientNetCfg.address}")
+
+      with subtest("DNS resolution of overlay hostnames"):
+        client.succeed("ping -c 1 ${serverNetCfg.fqdn}")
+        server.succeed("ping -c 1 ${clientNetCfg.fqdn}")
+
+      with subtest("SSH access restricted by role"):
+        client.succeed("ssh ${sshOptions} seb@${serverNetCfg.fqdn} 'echo Hello'")
+        server.fail("ssh ${sshOptions} seb@${clientNetCfg.fqdn} 'echo Hello'")
+    '';
+}

tests/infrastructure/keys/ca.crt

@@ -0,0 +1,5 @@
+-----BEGIN NEBULA CERTIFICATE V2-----
+MHygFoAEdGVzdIQB/4UEaY8shIYFASWHSoSCIM0af4sq7VnPAySG5h9fwiq/XHvD
+a0Ssbk1+KVWFpR71g0DaZP8qR35Zut2z9i9D2bCDuagQNvvxCrkZ3JcF0gMvWu3u
+uzKQMKzJSqipppgL/n3iQwwsBAoHYrx1XAY6zXgE
+-----END NEBULA CERTIFICATE V2-----

tests/infrastructure/keys/ca.key

@@ -0,0 +1,4 @@
+-----BEGIN NEBULA ED25519 PRIVATE KEY-----
+8kwpb4GZIphJmamXx0ZrLm5TxPZ7G88L44mrdT2dQp3NGn+LKu1ZzwMkhuYfX8Iq
+v1x7w2tErG5NfilVhaUe9Q==
+-----END NEBULA ED25519 PRIVATE KEY-----

tests/infrastructure/keys/client-ssh

@@ -0,0 +1,7 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
+QyNTUxOQAAACAlgMZnmVp3UFMSm/8Q/rhtOw3ioF7mpaBUyvXFwmBkMQAAAJCrUHOSq1Bz
+kgAAAAtzc2gtZWQyNTUxOQAAACAlgMZnmVp3UFMSm/8Q/rhtOw3ioF7mpaBUyvXFwmBkMQ
+AAAEB7OMxyFWm+GuvQA/GCdLPPXwkqC9rhPKdrLQU5PRt1fiWAxmeZWndQUxKb/xD+uG07
+DeKgXualoFTK9cXCYGQxAAAACnNlYkBsYXB0b3ABAgM=
+-----END OPENSSH PRIVATE KEY-----

tests/infrastructure/keys/client-ssh.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICWAxmeZWndQUxKb/xD+uG07DeKgXualoFTK9cXCYGQx seb@laptop

tests/infrastructure/keys/client.crt

@@ -0,0 +1,6 @@
+-----BEGIN NEBULA CERTIFICATE V2-----
+MIGwoEqABmNsaWVudKEHBAUKCgoDGKMIDAZjbGllbnSFBGmPLfCGBQElh0qDhyA8
+ckeBMU2fPOMFe8cEQoAZW3a1/xd+hPuJgkRptJYkIIIg+h9fWh7oVaJEMJmmfCcC
+zmFUQuPen59PiEE0+AKBbCyDQAIqxF7cIf5fL+z3zimUASA4hB5qFUCGEH+Er/Z6
+vFXe0jHV4HYRBMaXgrM8JYnsGZgTtdyt+mlJR+uBWpH+pwg=
+-----END NEBULA CERTIFICATE V2-----

tests/infrastructure/keys/client.key

@@ -0,0 +1,3 @@
+-----BEGIN NEBULA X25519 PRIVATE KEY-----
+qURs9kzi3rsW8GLnOtzEV11M9TWs+0XSQxpEFN9Ab1Y=
+-----END NEBULA X25519 PRIVATE KEY-----

tests/infrastructure/keys/lighthouse.crt

@@ -0,0 +1,6 @@
+-----BEGIN NEBULA CERTIFICATE V2-----
+MIG0oE6ACmxpZ2h0aG91c2WhBwQFCgoKARijCAwGc2VydmVyhQRpjy1MhgUBJYdK
+g4cgPHJHgTFNnzzjBXvHBEKAGVt2tf8XfoT7iYJEabSWJCCCIOfG1wz7tFj9GCvc
+nth3Wm4oGYfK/iR7hbSXts8uAOwhg0DRuHJ6mGgi2deJIDz7aI6KmhMiWkdEnoxA
+X8Eo5lZ4iIqyIiC8yAwYOMK1yHOVbfMplsUmhPgLw8Fu7wxSaiML
+-----END NEBULA CERTIFICATE V2-----

tests/infrastructure/keys/lighthouse.key

@@ -0,0 +1,3 @@
+-----BEGIN NEBULA X25519 PRIVATE KEY-----
+fR7KPdR2nDOZtR/gEI+qwKQXI9JSAdi/j7PjYTAJShE=
+-----END NEBULA X25519 PRIVATE KEY-----

tests/infrastructure/keys/server-ssh

@@ -0,0 +1,7 @@
+-----BEGIN OPENSSH PRIVATE KEY-----
+b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
+QyNTUxOQAAACBJ2fq1Q0oa5oZsEZuznAiux5ODES6fAvtqmOiiEBkxWgAAAJCyC2p+sgtq
+fgAAAAtzc2gtZWQyNTUxOQAAACBJ2fq1Q0oa5oZsEZuznAiux5ODES6fAvtqmOiiEBkxWg
+AAAED6j1Y/BoQsyvxtApUWipiCHCT1SiVyXf3NgmSsAjHAZknZ+rVDShrmhmwRm7OcCK7H
+k4MRLp8C+2qY6KIQGTFaAAAACnNlYkBsYXB0b3ABAgM=
+-----END OPENSSH PRIVATE KEY-----

tests/infrastructure/keys/server-ssh.pub

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEnZ+rVDShrmhmwRm7OcCK7Hk4MRLp8C+2qY6KIQGTFa seb@laptop

tests/infrastructure/keys/server.crt

@@ -0,0 +1,6 @@
+-----BEGIN NEBULA CERTIFICATE V2-----
+MIGwoEqABnNlcnZlcqEHBAUKCgoCGKMIDAZzZXJ2ZXKFBGmPLYyGBQElh0qDhyA8
+ckeBMU2fPOMFe8cEQoAZW3a1/xd+hPuJgkRptJYkIIIgWaZqtu8FVy/2REaZAVFo
+BIOUaKrBSyrZuiLcBcFneR+DQOlv7S1H9Elhzl/8IhCCpiyamhkm4SL0eYV1N+S9
+lAsj3ga9dga/N5QqNZtWUs8RGgPzttNF8GOy0Evf10lZKwY=
+-----END NEBULA CERTIFICATE V2-----

tests/infrastructure/keys/server.key

@@ -0,0 +1,3 @@
+-----BEGIN NEBULA X25519 PRIVATE KEY-----
+ug2E1t5D3hFNSwivf+sz0S9Xb4k44F0WM0lYyfw3X8I=
+-----END NEBULA X25519 PRIVATE KEY-----