[Mysql] use python bootstrapper to start MYSQL container

data/Dockerfiles/bootstrap/modules/BootstrapMysql.py

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+from jinja2 import Environment, FileSystemLoader
+from modules.BootstrapBase import BootstrapBase
+from pathlib import Path
+import os
+import sys
+import time
+import platform
+import subprocess
+
+class Bootstrap(BootstrapBase):
+  def bootstrap(self):
+    self.upgrade_mysql()
+
+    # Setup Jinja2 Environment and load vars
+    self.env = Environment(
+      loader=FileSystemLoader('./etc/mysql/conf.d/config_templates'),
+      keep_trailing_newline=True,
+      lstrip_blocks=True,
+      trim_blocks=True
+    )
+    extra_vars = {
+    }
+    self.env_vars = self.prepare_template_vars('/overwrites.json', extra_vars)
+
+    print("Set Timezone")
+    self.set_timezone()
+
+    print("Render config")
+    self.render_config("my.cnf.j2", "/etc/mysql/conf.d/my.cnf")
+
+  def upgrade_mysql(self, max_retries=5, wait_interval=3):
+    """
+    Runs mysql_upgrade in a controlled way using run_command.
+    Starts mysqld in background, upgrades, shuts down, then restarts in foreground.
+    """
+
+    dbuser = "root"
+    dbpass = os.getenv("MYSQL_ROOT_PASSWORD", "")
+    socket = "/var/run/mysqld/mysqld.sock"
+
+    print("Starting temporary mysqld for upgrade...")
+    temp_proc = subprocess.Popen([
+      "mysqld",
+      "--user=mysql",
+      "--skip-networking",
+      f"--socket={socket}"
+    ])
+
+    self.connect_mysql()
+
+    print("Running mysql_upgrade...")
+    retries = 0
+    while retries < max_retries:
+      result = self.run_command([
+        "mysql_upgrade",
+        "-u", dbuser,
+        f"-p{dbpass}",
+        f"--socket={socket}"
+      ], check=False)
+
+      if result.returncode == 0:
+        print("mysql_upgrade completed successfully.")
+        break
+      else:
+        print(f"mysql_upgrade failed (try {retries+1}/{max_retries})")
+        retries += 1
+        time.sleep(wait_interval)
+    else:
+      print("mysql_upgrade failed after all retries.")
+      temp_proc.terminate()
+      return False
+
+    print("Shutting down temporary mysqld...")
+    self.run_command([
+      "mariadb-admin",
+      "shutdown",
+      f"--socket={socket}",
+      "-u", dbuser,
+      f"-p{dbpass}"
+    ])