Complete version of letsencrypt_renew.py

letsencrypt_renew.py

@@ -1,7 +1,9 @@
 #!/usr/bin/env python3
 
+import argparse
 from io import TextIOWrapper
 import logging
+from pathlib import Path
 
 from sarge import run, shell_format, capture_both
 from systemd.journal import JournalHandler
@@ -41,27 +43,100 @@ def parse_domain_list(domainfile):
     return domains
 
 
-def renew_domains(letsencrypt_path, domains):
+def renew_domains(letsencrypt_path, domains, dry_run=False):
 
     domains = " ".join(domains)
     command = " ".join([letsencrypt_path, "certonly", domains])
 
     logger.info("Renewing domain certificates...")
-    process = capture_both(command)
 
-    for stdout in TextIOWrapper(process.stdout):
-        logger.info(stdin)
+    if not dry_run:
 
-    for stderr in TextIOWrapper(process.stderr):
-        logger.info(stderr)
+        process = capture_both(command)
 
-    if process.returncode != 0:
-        logger.error("Let's Encrypt domain renewal failed.")
-        return
+        for stdout in TextIOWrapper(process.stdout):
+            logger.info(stdin)
+
+        for stderr in TextIOWrapper(process.stderr):
+            logger.info(stderr)
+
+        if process.returncode != 0:
+            logger.error("Let's Encrypt domain renewal failed.")
+            return
+        else:
+            logger.info("Domain renewal succeeded.")
+
+        restart_services()
     else:
-        logger.info("Domain renewal succeeded.")
+        print("The following command will be performed:")
+        print(command)
 
 
+def get_letsencrypt_path(configfile):
+
+    with open(configfile, "r") as handle:
+
+        for row in handle:
+
+            if not row.rstrip():
+                continue
+
+            # Ignore everything after # (comment)
+            row = row.partition("#")[0]
+            row = row.rstrip()
+
+            if not row:
+                continue
+
+            if row.startswith("LETSENCRYPT_COMMAND"):
+                break
+
+        command_path = row.split("=")[1]
+
+        if not Path(command_path).exists():
+            logger.error("No letsencrypt command found.")
+            return
+
+        return command_path
 
 
+def restart_services():
+
+    logger.info("Restarting web server...")
+    run("/bin/systemctl restart nginx")
+    logger.info("Reloading mail server configuration...")
+    run("/bin/systemctl restart postfix")
+    logger.info("Services restarted.")
+
+
+def main():
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-c", "--config-file",
+                        default="/etc/sysconfig/letsencrypt/config",
+                        help="Configuration file to use")
+    parser.add_argument("-d", "--domain-file";
+                        default="/etc/sysconfig/letsencrypt/domains",
+                        help="File including domains (one per line)")
+    parser.add_argument("--dry-run", action="store_true",
+                        help="Just print out the command, don't do anything")
+
+    options = parser.parse_args()
+
+    letsencrypt_path = get_letsencrypt_path(options.config_file)
+
+    if letsencrypt_path is None:
+        return
+
+    domains = parse_domain_list(options.domain_file)
+
+    if not domains:
+        return
+
+    renew_domains(letsencrypt_path, domains, dry_run=options.dry_run)
+
+
+if __name__ == "__main__":
+    main()
+