1 files changed, 131 insertions, 0 deletions
diff --git a/nixpkgs/nixos/tests/cassandra.nix b/nixpkgs/nixos/tests/cassandra.nix
new file mode 100644
index 00000000000..05607956a9d
--- /dev/null
+++ b/nixpkgs/nixos/tests/cassandra.nix
@@ -0,0 +1,131 @@
+import ./make-test-python.nix ({ pkgs, lib, ... }:
+let
+  # Change this to test a different version of Cassandra:
+  testPackage = pkgs.cassandra;
+  clusterName = "NixOS Automated-Test Cluster";
+
+  testRemoteAuth = lib.versionAtLeast testPackage.version "3.11";
+  jmxRoles = [{ username = "me"; password = "password"; }];
+  jmxRolesFile = ./cassandra-jmx-roles;
+  jmxAuthArgs = "-u ${(builtins.elemAt jmxRoles 0).username} -pw ${(builtins.elemAt jmxRoles 0).password}";
+  jmxPort = 7200;  # Non-standard port so it doesn't accidentally work
+  jmxPortStr = toString jmxPort;
+
+  # Would usually be assigned to 512M.
+  # Set it to a different value, so that we can check whether our config
+  # actually changes it.
+  numMaxHeapSize = "400";
+  getHeapLimitCommand = ''
+    nodetool info -p ${jmxPortStr} | grep "^Heap Memory" | awk '{print $NF}'
+  '';
+  checkHeapLimitCommand = pkgs.writeShellScript "check-heap-limit.sh" ''
+    [ 1 -eq "$(echo "$(${getHeapLimitCommand}) < ${numMaxHeapSize}" | ${pkgs.bc}/bin/bc)" ]
+  '';
+
+  cassandraCfg = ipAddress:
+    { enable = true;
+      inherit clusterName;
+      listenAddress = ipAddress;
+      rpcAddress = ipAddress;
+      seedAddresses = [ "192.168.1.1" ];
+      package = testPackage;
+      maxHeapSize = "${numMaxHeapSize}M";
+      heapNewSize = "100M";
+      inherit jmxPort;
+    };
+  nodeCfg = ipAddress: extra: {pkgs, config, ...}: rec {
+    environment.systemPackages = [ testPackage ];
+    networking = {
+      firewall.allowedTCPPorts = [ 7000 9042 services.cassandra.jmxPort ];
+      useDHCP = false;
+      interfaces.eth1.ipv4.addresses = pkgs.lib.mkOverride 0 [
+        { address = ipAddress; prefixLength = 24; }
+      ];
+    };
+    services.cassandra = cassandraCfg ipAddress // extra;
+    virtualisation.memorySize = 1024;
+  };
+in
+{
+  name = "cassandra";
+  meta = {
+    maintainers = with lib.maintainers; [ johnazoidberg ];
+  };
+
+  nodes = {
+    cass0 = nodeCfg "192.168.1.1" {};
+    cass1 = nodeCfg "192.168.1.2" (lib.optionalAttrs testRemoteAuth { inherit jmxRoles; remoteJmx = true; });
+    cass2 = nodeCfg "192.168.1.3" { jvmOpts = [ "-Dcassandra.replace_address=cass1" ]; };
+  };
+
+  testScript = ''
+    # Check configuration
+    with subtest("Timers exist"):
+        cass0.succeed("systemctl list-timers | grep cassandra-full-repair.timer")
+        cass0.succeed("systemctl list-timers | grep cassandra-incremental-repair.timer")
+
+    with subtest("Can connect via cqlsh"):
+        cass0.wait_for_unit("cassandra.service")
+        cass0.wait_until_succeeds("nc -z cass0 9042")
+        cass0.succeed("echo 'show version;' | cqlsh cass0")
+
+    with subtest("Nodetool is operational"):
+        cass0.wait_for_unit("cassandra.service")
+        cass0.wait_until_succeeds("nc -z localhost ${jmxPortStr}")
+        cass0.succeed("nodetool status -p ${jmxPortStr} --resolve-ip | egrep '^UN[[:space:]]+cass0'")
+
+    with subtest("Cluster name was set"):
+        cass0.wait_for_unit("cassandra.service")
+        cass0.wait_until_succeeds("nc -z localhost ${jmxPortStr}")
+        cass0.wait_until_succeeds(
+            "nodetool describecluster -p ${jmxPortStr} | grep 'Name: ${clusterName}'"
+        )
+
+    with subtest("Heap limit set correctly"):
+        # Nodetool takes a while until it can display info
+        cass0.wait_until_succeeds("nodetool info -p ${jmxPortStr}")
+        cass0.succeed("${checkHeapLimitCommand}")
+
+    # Check cluster interaction
+    with subtest("Bring up cluster"):
+        cass1.wait_for_unit("cassandra.service")
+        cass1.wait_until_succeeds(
+            "nodetool -p ${jmxPortStr} ${jmxAuthArgs} status | egrep -c '^UN' | grep 2"
+        )
+        cass0.succeed("nodetool status -p ${jmxPortStr} --resolve-ip | egrep '^UN[[:space:]]+cass1'")
+  '' + lib.optionalString testRemoteAuth ''
+    with subtest("Remote authenticated jmx"):
+        # Doesn't work if not enabled
+        cass0.wait_until_succeeds("nc -z localhost ${jmxPortStr}")
+        cass1.fail("nc -z 192.168.1.1 ${jmxPortStr}")
+        cass1.fail("nodetool -p ${jmxPortStr} -h 192.168.1.1 status")
+
+        # Works if enabled
+        cass1.wait_until_succeeds("nc -z localhost ${jmxPortStr}")
+        cass0.succeed("nodetool -p ${jmxPortStr} -h 192.168.1.2 ${jmxAuthArgs} status")
+  '' + ''
+    with subtest("Break and fix node"):
+        cass1.block()
+        cass0.wait_until_succeeds(
+            "nodetool status -p ${jmxPortStr} --resolve-ip | egrep -c '^DN[[:space:]]+cass1'"
+        )
+        cass0.succeed("nodetool status -p ${jmxPortStr} | egrep -c '^UN'  | grep 1")
+        cass1.unblock()
+        cass1.wait_until_succeeds(
+            "nodetool -p ${jmxPortStr} ${jmxAuthArgs} status | egrep -c '^UN'  | grep 2"
+        )
+        cass0.succeed("nodetool status -p ${jmxPortStr} | egrep -c '^UN'  | grep 2")
+
+    with subtest("Replace crashed node"):
+        cass1.block()  # .crash() waits until it's fully shutdown
+        cass2.start()
+        cass0.wait_until_fails(
+            "nodetool status -p ${jmxPortStr} --resolve-ip | egrep '^UN[[:space:]]+cass1'"
+        )
+
+        cass2.wait_for_unit("cassandra.service")
+        cass0.wait_until_succeeds(
+            "nodetool status -p ${jmxPortStr} --resolve-ip | egrep '^UN[[:space:]]+cass2'"
+        )
+  '';
+})