224 lines
7.7 KiB
Nix
224 lines
7.7 KiB
Nix
import ./make-test-python.nix ({ pkgs, lib, ... }: let
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# We'll need to be able to trade cert files between nodes via scp.
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inherit (import ./ssh-keys.nix pkgs)
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snakeOilPrivateKey snakeOilPublicKey;
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makeNebulaNode = { config, ... }: name: extraConfig: lib.mkMerge [
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{
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# Expose nebula for doing cert signing.
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environment.systemPackages = [ pkgs.nebula ];
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users.users.root.openssh.authorizedKeys.keys = [ snakeOilPublicKey ];
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services.openssh.enable = true;
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services.nebula.networks.smoke = {
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# Note that these paths won't exist when the machine is first booted.
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ca = "/etc/nebula/ca.crt";
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cert = "/etc/nebula/${name}.crt";
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key = "/etc/nebula/${name}.key";
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listen = { host = "0.0.0.0"; port = 4242; };
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};
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}
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extraConfig
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];
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in
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{
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name = "nebula";
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nodes = {
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lighthouse = { ... } @ args:
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makeNebulaNode args "lighthouse" {
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networking.interfaces.eth1.ipv4.addresses = [{
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address = "192.168.1.1";
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prefixLength = 24;
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}];
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services.nebula.networks.smoke = {
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isLighthouse = true;
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firewall = {
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outbound = [ { port = "any"; proto = "any"; host = "any"; } ];
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inbound = [ { port = "any"; proto = "any"; host = "any"; } ];
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};
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};
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};
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node2 = { ... } @ args:
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makeNebulaNode args "node2" {
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networking.interfaces.eth1.ipv4.addresses = [{
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address = "192.168.1.2";
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prefixLength = 24;
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}];
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services.nebula.networks.smoke = {
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staticHostMap = { "10.0.100.1" = [ "192.168.1.1:4242" ]; };
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isLighthouse = false;
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lighthouses = [ "10.0.100.1" ];
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firewall = {
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outbound = [ { port = "any"; proto = "any"; host = "any"; } ];
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inbound = [ { port = "any"; proto = "any"; host = "any"; } ];
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};
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};
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};
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node3 = { ... } @ args:
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makeNebulaNode args "node3" {
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networking.interfaces.eth1.ipv4.addresses = [{
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address = "192.168.1.3";
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prefixLength = 24;
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}];
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services.nebula.networks.smoke = {
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staticHostMap = { "10.0.100.1" = [ "192.168.1.1:4242" ]; };
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isLighthouse = false;
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lighthouses = [ "10.0.100.1" ];
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firewall = {
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outbound = [ { port = "any"; proto = "any"; host = "any"; } ];
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inbound = [ { port = "any"; proto = "any"; host = "lighthouse"; } ];
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};
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};
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};
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node4 = { ... } @ args:
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makeNebulaNode args "node4" {
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networking.interfaces.eth1.ipv4.addresses = [{
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address = "192.168.1.4";
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prefixLength = 24;
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}];
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services.nebula.networks.smoke = {
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enable = true;
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staticHostMap = { "10.0.100.1" = [ "192.168.1.1:4242" ]; };
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isLighthouse = false;
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lighthouses = [ "10.0.100.1" ];
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firewall = {
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outbound = [ { port = "any"; proto = "any"; host = "lighthouse"; } ];
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inbound = [ { port = "any"; proto = "any"; host = "any"; } ];
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};
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};
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};
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node5 = { ... } @ args:
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makeNebulaNode args "node5" {
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networking.interfaces.eth1.ipv4.addresses = [{
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address = "192.168.1.5";
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prefixLength = 24;
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}];
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services.nebula.networks.smoke = {
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enable = false;
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staticHostMap = { "10.0.100.1" = [ "192.168.1.1:4242" ]; };
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isLighthouse = false;
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lighthouses = [ "10.0.100.1" ];
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firewall = {
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outbound = [ { port = "any"; proto = "any"; host = "lighthouse"; } ];
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inbound = [ { port = "any"; proto = "any"; host = "any"; } ];
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};
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};
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};
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};
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testScript = let
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setUpPrivateKey = name: ''
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${name}.succeed(
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"mkdir -p /root/.ssh",
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"chown 700 /root/.ssh",
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"cat '${snakeOilPrivateKey}' > /root/.ssh/id_snakeoil",
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"chown 600 /root/.ssh/id_snakeoil",
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)
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'';
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# From what I can tell, StrictHostKeyChecking=no is necessary for ssh to work between machines.
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sshOpts = "-oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -oIdentityFile=/root/.ssh/id_snakeoil";
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restartAndCheckNebula = name: ip: ''
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${name}.systemctl("restart nebula@smoke.service")
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${name}.succeed("ping -c5 ${ip}")
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'';
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# Create a keypair on the client node, then use the public key to sign a cert on the lighthouse.
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signKeysFor = name: ip: ''
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lighthouse.wait_for_unit("sshd.service")
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${name}.wait_for_unit("sshd.service")
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${name}.succeed(
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"mkdir -p /etc/nebula",
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"nebula-cert keygen -out-key /etc/nebula/${name}.key -out-pub /etc/nebula/${name}.pub",
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"scp ${sshOpts} /etc/nebula/${name}.pub 192.168.1.1:/tmp/${name}.pub",
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)
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lighthouse.succeed(
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'nebula-cert sign -ca-crt /etc/nebula/ca.crt -ca-key /etc/nebula/ca.key -name "${name}" -groups "${name}" -ip "${ip}" -in-pub /tmp/${name}.pub -out-crt /tmp/${name}.crt',
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)
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${name}.succeed(
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"scp ${sshOpts} 192.168.1.1:/tmp/${name}.crt /etc/nebula/${name}.crt",
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"scp ${sshOpts} 192.168.1.1:/etc/nebula/ca.crt /etc/nebula/ca.crt",
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)
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'';
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in ''
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start_all()
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# Create the certificate and sign the lighthouse's keys.
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${setUpPrivateKey "lighthouse"}
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lighthouse.succeed(
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"mkdir -p /etc/nebula",
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'nebula-cert ca -name "Smoke Test" -out-crt /etc/nebula/ca.crt -out-key /etc/nebula/ca.key',
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'nebula-cert sign -ca-crt /etc/nebula/ca.crt -ca-key /etc/nebula/ca.key -name "lighthouse" -groups "lighthouse" -ip "10.0.100.1/24" -out-crt /etc/nebula/lighthouse.crt -out-key /etc/nebula/lighthouse.key',
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)
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# Reboot the lighthouse and verify that the nebula service comes up on boot.
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# Since rebooting takes a while, we'll just restart the service on the other nodes.
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lighthouse.shutdown()
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lighthouse.start()
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lighthouse.wait_for_unit("nebula@smoke.service")
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lighthouse.succeed("ping -c5 10.0.100.1")
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# Create keys for node2's nebula service and test that it comes up.
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${setUpPrivateKey "node2"}
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${signKeysFor "node2" "10.0.100.2/24"}
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${restartAndCheckNebula "node2" "10.0.100.2"}
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# Create keys for node3's nebula service and test that it comes up.
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${setUpPrivateKey "node3"}
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${signKeysFor "node3" "10.0.100.3/24"}
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${restartAndCheckNebula "node3" "10.0.100.3"}
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# Create keys for node4's nebula service and test that it comes up.
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${setUpPrivateKey "node4"}
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${signKeysFor "node4" "10.0.100.4/24"}
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${restartAndCheckNebula "node4" "10.0.100.4"}
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# Create keys for node4's nebula service and test that it does not come up.
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${setUpPrivateKey "node5"}
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${signKeysFor "node5" "10.0.100.5/24"}
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node5.fail("systemctl status nebula@smoke.service")
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node5.fail("ping -c5 10.0.100.5")
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# The lighthouse can ping node2 and node3 but not node5
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lighthouse.succeed("ping -c3 10.0.100.2")
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lighthouse.succeed("ping -c3 10.0.100.3")
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lighthouse.fail("ping -c3 10.0.100.5")
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# node2 can ping the lighthouse, but not node3 because of its inbound firewall
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node2.succeed("ping -c3 10.0.100.1")
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node2.fail("ping -c3 10.0.100.3")
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# node3 can ping the lighthouse and node2
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node3.succeed("ping -c3 10.0.100.1")
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node3.succeed("ping -c3 10.0.100.2")
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# node4 can ping the lighthouse but not node2 or node3
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node4.succeed("ping -c3 10.0.100.1")
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node4.fail("ping -c3 10.0.100.2")
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node4.fail("ping -c3 10.0.100.3")
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# node2 can ping node3 now that node3 pinged it first
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node2.succeed("ping -c3 10.0.100.3")
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# node4 can ping node2 if node2 pings it first
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node2.succeed("ping -c3 10.0.100.4")
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node4.succeed("ping -c3 10.0.100.2")
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'';
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})
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