[Postfix] use python bootstrapper to start POSTFIX container

data/Dockerfiles/bootstrap/main.py

@@ -8,6 +8,8 @@ def main():
     from modules.BootstrapSogo import Bootstrap
   elif container_name == "nginx-mailcow":
     from modules.BootstrapNginx import Bootstrap
+  elif container_name == "postfix-mailcow":
+    from modules.BootstrapPostfix import Bootstrap
   else:
     print(f"No bootstrap handler for container: {container_name}", file=sys.stderr)
     sys.exit(1)

data/Dockerfiles/bootstrap/modules/BootstrapBase.py

@@ -231,6 +231,21 @@ class BootstrapBase:
 
     shutil.move(str(src_path), str(dst_path))
 
+  def create_dir(self, path):
+    """
+    Creates a directory if it does not exist.
+
+    If the directory is missing, it will be created along with any necessary parent directories.
+
+    Args:
+      path (str or Path): The directory path to create.
+    """
+
+    dir_path = Path(path)
+    if not dir_path.exists():
+      print(f"Creating directory: {dir_path}")
+      dir_path.mkdir(parents=True, exist_ok=True)
+
   def patch_exists(self, target_file, patch_file, reverse=False):
     """
     Checks whether a patch can be applied (or reversed) to a target file.
@@ -414,6 +429,35 @@ class BootstrapBase:
       print(f"Waiting for {host}...")
       time.sleep(retry_interval)
 
+  def wait_for_dns(self, domain, retry_interval=1, timeout=30):
+    """
+    Waits until the domain resolves via DNS using pure Python (socket).
+
+    Args:
+      domain (str): The domain to resolve.
+      retry_interval (int): Time (seconds) to wait between attempts.
+      timeout (int): Maximum total wait time (seconds).
+
+    Returns:
+      bool: True if resolved, False if timed out.
+    """
+
+    start = time.time()
+    while True:
+      try:
+        socket.gethostbyname(domain)
+        print(f"{domain} is resolving via DNS.")
+        return True
+      except socket.gaierror:
+        pass
+
+      if time.time() - start > timeout:
+        print(f"DNS resolution for {domain} timed out.")
+        return False
+
+      print(f"Waiting for DNS for {domain}...")
+      time.sleep(retry_interval)
+
   def _get_current_db_version(self):
     """
     Fetches the current schema version from the database.
@@ -478,3 +522,41 @@ class BootstrapBase:
 
     allowed_chars = string.ascii_letters + string.digits + "_-"
     return ''.join(secrets.choice(allowed_chars) for _ in range(length))
+
+  def run_command(self, command, check=True, shell=False):
+    """
+    Executes an OS command and optionally checks for errors.
+
+    Args:
+      command (str or list): The command to execute. Can be a string (if shell=True)
+                            or a list of command arguments.
+      check (bool): If True, raises CalledProcessError on failure.
+      shell (bool): If True, runs the command in a shell.
+
+    Returns:
+      subprocess.CompletedProcess: The result of the command execution.
+
+    Logs:
+      Prints the command being run and any error output.
+    """
+
+    try:
+      result = subprocess.run(
+        command,
+        shell=shell,
+        check=check,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        text=True
+      )
+      if result.stdout:
+        print(result.stdout.strip())
+      if result.stderr:
+        print(result.stderr.strip())
+      return result
+    except subprocess.CalledProcessError as e:
+      print(f"Command failed with exit code {e.returncode}: {e.cmd}")
+      print(e.stderr.strip())
+      if check:
+        raise
+      return e

data/Dockerfiles/bootstrap/modules/BootstrapNginx.py

@@ -22,10 +22,10 @@ class Bootstrap(BootstrapBase):
 
     # Setup Jinja2 Environment and load vars
     self.env = Environment(
-      loader=FileSystemLoader('./etc/nginx/conf.d/templates'),
+      loader=FileSystemLoader('./etc/nginx/conf.d/config_templates'),
       keep_trailing_newline=True,
-      lstrip_blocks=False,
-      trim_blocks=False
+      lstrip_blocks=True,
+      trim_blocks=True
     )
     extra_vars = {
       "VALID_CERT_DIRS": self.get_valid_cert_dirs(),

data/Dockerfiles/bootstrap/modules/BootstrapPostfix.py

@@ -0,0 +1,115 @@
+from jinja2 import Environment, FileSystemLoader
+from modules.BootstrapBase import BootstrapBase
+from pathlib import Path
+import os
+import sys
+import time
+
+class Bootstrap(BootstrapBase):
+  def bootstrap(self):
+    # Connect to MySQL
+    self.connect_mysql()
+
+    # Wait for DNS
+    self.wait_for_dns("mailcow.email")
+
+    self.create_dir("/opt/postfix/conf/sql/")
+
+    # Setup Jinja2 Environment and load vars
+    self.env = Environment(
+      loader=FileSystemLoader('./opt/postfix/conf/config_templates'),
+      keep_trailing_newline=True,
+      lstrip_blocks=True,
+      trim_blocks=True
+    )
+    with open("/opt/postfix/conf/extra.cf", "r") as f:
+      extra_config = f.read()
+    extra_vars = {
+      "VALID_CERT_DIRS": self.get_valid_cert_dirs(),
+      "EXTRA_CF": extra_config
+    }
+    self.env_vars = self.prepare_template_vars('/overwrites.json', extra_vars)
+
+    print("Set Timezone")
+    self.set_timezone()
+
+    print("Set Syslog redis")
+    self.set_syslog_redis()
+
+    print("Render config")
+    self.render_config("aliases.j2", "/etc/aliases")
+    self.render_config("mysql_relay_ne.cf.j2", "/opt/postfix/conf/sql/mysql_relay_ne.cf")
+    self.render_config("mysql_relay_recipient_maps.cf.j2", "/opt/postfix/conf/sql/mysql_relay_recipient_maps.cf")
+    self.render_config("mysql_tls_policy_override_maps.cf.j2", "/opt/postfix/conf/sql/mysql_tls_policy_override_maps.cf")
+    self.render_config("mysql_tls_enforce_in_policy.cf.j2", "/opt/postfix/conf/sql/mysql_tls_enforce_in_policy.cf")
+    self.render_config("mysql_sender_dependent_default_transport_maps.cf.j2", "/opt/postfix/conf/sql/mysql_sender_dependent_default_transport_maps.cf")
+    self.render_config("mysql_transport_maps.cf.j2", "/opt/postfix/conf/sql/mysql_transport_maps.cf")
+    self.render_config("mysql_virtual_resource_maps.cf.j2", "/opt/postfix/conf/sql/mysql_virtual_resource_maps.cf")
+    self.render_config("mysql_sasl_passwd_maps_sender_dependent.cf.j2", "/opt/postfix/conf/sql/mysql_sasl_passwd_maps_sender_dependent.cf")
+    self.render_config("mysql_sasl_passwd_maps_transport_maps.cf.j2", "/opt/postfix/conf/sql/mysql_sasl_passwd_maps_transport_maps.cf")
+    self.render_config("mysql_virtual_alias_domain_maps.cf.j2", "/opt/postfix/conf/sql/mysql_virtual_alias_domain_maps.cf")
+    self.render_config("mysql_virtual_alias_maps.cf.j2", "/opt/postfix/conf/sql/mysql_virtual_alias_maps.cf")
+    self.render_config("mysql_recipient_bcc_maps.cf.j2", "/opt/postfix/conf/sql/mysql_recipient_bcc_maps.cf")
+    self.render_config("mysql_sender_bcc_maps.cf.j2", "/opt/postfix/conf/sql/mysql_sender_bcc_maps.cf")
+    self.render_config("mysql_recipient_canonical_maps.cf.j2", "/opt/postfix/conf/sql/mysql_recipient_canonical_maps.cf")
+    self.render_config("mysql_virtual_domains_maps.cf.j2", "/opt/postfix/conf/sql/mysql_virtual_domains_maps.cf")
+    self.render_config("mysql_virtual_mailbox_maps.cf.j2", "/opt/postfix/conf/sql/mysql_virtual_mailbox_maps.cf")
+    self.render_config("mysql_virtual_relay_domain_maps.cf.j2", "/opt/postfix/conf/sql/mysql_virtual_relay_domain_maps.cf")
+    self.render_config("mysql_virtual_sender_acl.cf.j2", "/opt/postfix/conf/sql/mysql_virtual_sender_acl.cf")
+    self.render_config("mysql_mbr_access_maps.cf.j2", "/opt/postfix/conf/sql/mysql_mbr_access_maps.cf")
+    self.render_config("mysql_virtual_spamalias_maps.cf.j2", "/opt/postfix/conf/sql/mysql_virtual_spamalias_maps.cf")
+    self.render_config("sni.map.j2", "/opt/postfix/conf/sni.map")
+    self.render_config("main.cf.j2", "/opt/postfix/conf/main.cf")
+
+    # Conditional render
+    if not Path("/opt/postfix/conf/dns_blocklists.cf").exists():
+      self.render_config("dns_blocklists.cf.j2", "/opt/postfix/conf/dns_blocklists.cf")
+    if not Path("/opt/postfix/conf/dns_reply.map").exists():
+      self.render_config("dns_reply.map.j2", "/opt/postfix/conf/dns_reply.map")
+    if not Path("/opt/postfix/conf/custom_postscreen_whitelist.cidr").exists():
+      self.render_config("custom_postscreen_whitelist.cidr.j2", "/opt/postfix/conf/custom_postscreen_whitelist.cidr")
+    if not Path("/opt/postfix/conf/custom_transport.pcre").exists():
+      self.render_config("custom_transport.pcre.j2", "/opt/postfix/conf/custom_transport.pcre")
+
+    # Create SNI Config
+    self.run_command(["postmap", "-F", "hash:/opt/postfix/conf/sni.map"])
+
+    # Fix Postfix permissions
+    self.set_owner("/opt/postfix/conf/sql", user="root", group="postfix", recursive=True)
+    self.set_owner("/opt/postfix/conf/custom_transport.pcre", user="root", group="postfix")
+    for cf_file in Path("/opt/postfix/conf/sql").glob("*.cf"):
+      self.set_permissions(cf_file, 0o640)
+    self.set_permissions("/opt/postfix/conf/custom_transport.pcre", 0o640)
+    self.set_owner("/var/spool/postfix/public", user="root", group="postdrop", recursive=True)
+    self.set_owner("/var/spool/postfix/maildrop", user="root", group="postdrop", recursive=True)
+    self.run_command(["postfix", "set-permissions"], check=False)
+
+    # Checking if there is a leftover of a crashed postfix container before starting a new one
+    pid_file = Path("/var/spool/postfix/pid/master.pid")
+    if pid_file.exists():
+      print(f"Removing stale Postfix PID file: {pid_file}")
+      pid_file.unlink()
+
+  def get_valid_cert_dirs(self):
+    certs = {}
+    base_path = Path("/etc/ssl/mail")
+    if not base_path.exists():
+      return certs
+
+    for cert_dir in base_path.iterdir():
+      if not cert_dir.is_dir():
+        continue
+
+      domains_file = cert_dir / "domains"
+      cert_file = cert_dir / "cert.pem"
+      key_file = cert_dir / "key.pem"
+
+      if not (domains_file.exists() and cert_file.exists() and key_file.exists()):
+        continue
+
+      with open(domains_file, "r") as f:
+        domains = [line.strip() for line in f if line.strip()]
+        if domains:
+          certs[str(cert_dir)] = domains
+
+    return certs

data/Dockerfiles/bootstrap/modules/BootstrapSogo.py

@@ -29,8 +29,8 @@ class Bootstrap(BootstrapBase):
     self.env = Environment(
       loader=FileSystemLoader("./etc/sogo/config_templates"),
       keep_trailing_newline=True,
-      lstrip_blocks=False,
-      trim_blocks=False
+      lstrip_blocks=True,
+      trim_blocks=True
     )
     extra_vars = {
       "SQL_DOMAINS": self.get_domains(),