From 3474b55614775de1ddfa99368ef1c75ec8d7797f Mon Sep 17 00:00:00 2001
From: Aaron Andersen <aaron@fosslib.net>
Date: Fri, 20 Mar 2020 16:19:43 -0400
Subject: [PATCH 1/2] nixos/mysql: fix service so it works with mysql80 package

---
 nixos/modules/services/databases/mysql.nix | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/nixos/modules/services/databases/mysql.nix b/nixos/modules/services/databases/mysql.nix
index 248bf0ebc91..f9e657f5774 100644
--- a/nixos/modules/services/databases/mysql.nix
+++ b/nixos/modules/services/databases/mysql.nix
@@ -10,16 +10,8 @@ let
 
   isMariaDB = lib.getName mysql == lib.getName pkgs.mariadb;
 
-  isMysqlAtLeast57 =
-    (lib.getName mysql == lib.getName pkgs.mysql57)
-     && (builtins.compareVersions mysql.version "5.7" >= 0);
-
   mysqldOptions =
     "--user=${cfg.user} --datadir=${cfg.dataDir} --basedir=${mysql}";
-  # For MySQL 5.7+, --insecure creates the root user without password
-  # (earlier versions and MariaDB do this by default).
-  installOptions =
-    "${mysqldOptions} ${lib.optionalString isMysqlAtLeast57 "--insecure"}";
 
   settingsFile = pkgs.writeText "my.cnf" (
     generators.toINI { listsAsDuplicateKeys = true; } cfg.settings +
@@ -366,9 +358,14 @@ in
           pkgs.nettools
         ];
 
-        preStart = ''
+        preStart = if isMariaDB then ''
           if ! test -e ${cfg.dataDir}/mysql; then
-            ${mysql}/bin/mysql_install_db --defaults-file=/etc/my.cnf ${installOptions}
+            ${mysql}/bin/mysql_install_db --defaults-file=/etc/my.cnf ${mysqldOptions}
+            touch /tmp/mysql_init
+          fi
+        '' else ''
+          if ! test -e ${cfg.dataDir}/mysql; then
+            ${mysql}/bin/mysqld --defaults-file=/etc/my.cnf ${mysqldOptions} --initialize-insecure
             touch /tmp/mysql_init
           fi
         '';

From 6c47902e01ae1dab9967966b9a24536861436c6a Mon Sep 17 00:00:00 2001
From: Aaron Andersen <aaron@fosslib.net>
Date: Fri, 20 Mar 2020 20:46:26 -0400
Subject: [PATCH 2/2] nixos/mysql: test with mysql80 package

---
 nixos/tests/mysql.nix | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/nixos/tests/mysql.nix b/nixos/tests/mysql.nix
index 924bac84e26..84673181e1a 100644
--- a/nixos/tests/mysql.nix
+++ b/nixos/tests/mysql.nix
@@ -22,6 +22,27 @@ import ./make-test-python.nix ({ pkgs, ...} : {
         services.mysql.package = pkgs.mysql57;
       };
 
+    mysql80 =
+      { pkgs, ... }:
+
+      {
+        # prevent oom:
+        # Kernel panic - not syncing: Out of memory: compulsory panic_on_oom is enabled
+        virtualisation.memorySize = 1024;
+
+        services.mysql.enable = true;
+        services.mysql.initialDatabases = [
+          { name = "testdb"; schema = ./testdb.sql; }
+          { name = "empty_testdb"; }
+        ];
+        # note that using pkgs.writeText here is generally not a good idea,
+        # as it will store the password in world-readable /nix/store ;)
+        services.mysql.initialScript = pkgs.writeText "mysql-init.sql" ''
+          CREATE USER 'passworduser'@'localhost' IDENTIFIED BY 'password123';
+        '';
+        services.mysql.package = pkgs.mysql80;
+      };
+
     mariadb =
       { pkgs, ... }:
 
@@ -61,6 +82,12 @@ import ./make-test-python.nix ({ pkgs, ...} : {
     # ';' acts as no-op, just check whether login succeeds with the user created from the initialScript
     mysql.succeed("echo ';' | mysql -u passworduser --password=password123")
 
+    mysql80.wait_for_unit("mysql")
+    mysql80.succeed("echo 'use empty_testdb;' | mysql -u root")
+    mysql80.succeed("echo 'use testdb; select * from tests;' | mysql -u root -N | grep 4")
+    # ';' acts as no-op, just check whether login succeeds with the user created from the initialScript
+    mysql80.succeed("echo ';' | mysql -u passworduser --password=password123")
+
     mariadb.wait_for_unit("mysql")
     mariadb.succeed(
         "echo 'use testdb; create table tests (test_id INT, PRIMARY KEY (test_id));' | sudo -u testuser mysql -u testuser"