1 files changed, 81 insertions, 0 deletions
diff --git a/nixpkgs/nixos/tests/mysql-replication.nix b/nixpkgs/nixos/tests/mysql-replication.nix
new file mode 100644
index 000000000000..c75a862106f6
--- /dev/null
+++ b/nixpkgs/nixos/tests/mysql-replication.nix
@@ -0,0 +1,81 @@
+import ./make-test.nix ({ pkgs, ...} :
+
+let
+  replicateUser = "replicate";
+  replicatePassword = "secret";
+in
+
+{
+  name = "mysql-replication";
+  meta = with pkgs.stdenv.lib.maintainers; {
+    maintainers = [ eelco shlevy ];
+  };
+
+  nodes = {
+    master =
+      { pkgs, ... }:
+
+      {
+        services.mysql.enable = true;
+        services.mysql.package = pkgs.mysql;
+        services.mysql.replication.role = "master";
+        services.mysql.replication.slaveHost = "%";
+        services.mysql.replication.masterUser = replicateUser;
+        services.mysql.replication.masterPassword = replicatePassword;
+        services.mysql.initialDatabases = [ { name = "testdb"; schema = ./testdb.sql; } ];
+        networking.firewall.allowedTCPPorts = [ 3306 ];
+      };
+
+    slave1 =
+      { pkgs, nodes, ... }:
+
+      {
+        services.mysql.enable = true;
+        services.mysql.package = pkgs.mysql;
+        services.mysql.replication.role = "slave";
+        services.mysql.replication.serverId = 2;
+        services.mysql.replication.masterHost = nodes.master.config.networking.hostName;
+        services.mysql.replication.masterUser = replicateUser;
+        services.mysql.replication.masterPassword = replicatePassword;
+      };
+
+    slave2 =
+      { pkgs, nodes, ... }:
+
+      {
+        services.mysql.enable = true;
+        services.mysql.package = pkgs.mysql;
+        services.mysql.replication.role = "slave";
+        services.mysql.replication.serverId = 3;
+        services.mysql.replication.masterHost = nodes.master.config.networking.hostName;
+        services.mysql.replication.masterUser = replicateUser;
+        services.mysql.replication.masterPassword = replicatePassword;
+      };
+  };
+
+  testScript = ''
+    $master->start;
+    $master->waitForUnit("mysql");
+    $master->waitForOpenPort(3306);
+    # Wait for testdb to be fully populated (5 rows).
+    $master->waitUntilSucceeds("mysql -u root -D testdb -N -B -e 'select count(id) from tests' | grep -q 5");
+
+    $slave1->start;
+    $slave2->start;
+    $slave1->waitForUnit("mysql");
+    $slave1->waitForOpenPort(3306);
+    $slave2->waitForUnit("mysql");
+    $slave2->waitForOpenPort(3306);
+
+    # wait for replications to finish
+    $slave1->waitUntilSucceeds("mysql -u root -D testdb -N -B -e 'select count(id) from tests' | grep -q 5");
+    $slave2->waitUntilSucceeds("mysql -u root -D testdb -N -B -e 'select count(id) from tests' | grep -q 5");
+
+    $slave2->succeed("systemctl stop mysql");
+    $master->succeed("echo 'insert into testdb.tests values (123, 456);' | mysql -u root -N");
+    $slave2->succeed("systemctl start mysql");
+    $slave2->waitForUnit("mysql");
+    $slave2->waitForOpenPort(3306);
+    $slave2->waitUntilSucceeds("echo 'select * from testdb.tests where Id = 123;' | mysql -u root -N | grep 456");
+  '';
+})