1 files changed, 91 insertions, 0 deletions
diff --git a/nixpkgs/nixos/tests/mysql/mysql-replication.nix b/nixpkgs/nixos/tests/mysql/mysql-replication.nix
new file mode 100644
index 000000000000..ad84c801ea10
--- /dev/null
+++ b/nixpkgs/nixos/tests/mysql/mysql-replication.nix
@@ -0,0 +1,91 @@
+import ./../make-test-python.nix ({ pkgs, ...} :
+
+let
+  replicateUser = "replicate";
+  replicatePassword = "secret";
+in
+
+{
+  name = "mysql-replication";
+  meta = with pkgs.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.wait_for_unit("mysql")
+    master.wait_for_open_port(3306)
+    # Wait for testdb to be fully populated (5 rows).
+    master.wait_until_succeeds(
+        "sudo -u mysql mysql -u mysql -D testdb -N -B -e 'select count(id) from tests' | grep -q 5"
+    )
+
+    slave1.start()
+    slave2.start()
+    slave1.wait_for_unit("mysql")
+    slave1.wait_for_open_port(3306)
+    slave2.wait_for_unit("mysql")
+    slave2.wait_for_open_port(3306)
+
+    # wait for replications to finish
+    slave1.wait_until_succeeds(
+        "sudo -u mysql mysql -u mysql -D testdb -N -B -e 'select count(id) from tests' | grep -q 5"
+    )
+    slave2.wait_until_succeeds(
+        "sudo -u mysql mysql -u mysql -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);' | sudo -u mysql mysql -u mysql -N"
+    )
+    slave2.succeed("systemctl start mysql")
+    slave2.wait_for_unit("mysql")
+    slave2.wait_for_open_port(3306)
+    slave2.wait_until_succeeds(
+        "echo 'select * from testdb.tests where Id = 123;' | sudo -u mysql mysql -u mysql -N | grep 456"
+    )
+  '';
+})