Retry also on certain connection errors. (#680)

changelogs/fragments/680-acme-retry.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - "acme_* modules - also retry requests in case of socket errors, bad status lines, and unknown connection errors; improve error messages in these cases (https://github.com/ansible-collections/community.crypto/issues/680)."

plugins/module_utils/acme/acme.py

@@ -55,7 +55,8 @@ else:
     IPADDRESS_IMPORT_ERROR = None
 
 
-RETRY_STATUS_CODES = (408, 429, 503)
+# -1 usually means connection problems
+RETRY_STATUS_CODES = (-1, 408, 429, 503)
 
 
 def _decode_retry(module, response, info, retry_count):

plugins/module_utils/acme/errors.py

@@ -100,6 +100,8 @@ class ACMEProtocolException(ModuleFailException):
                         http_code=format_http_status(code), problem_code=content_json['status'])
                 else:
                     code = 'status {problem_code}'.format(problem_code=format_http_status(code))
+                    if code == -1 and info.get('msg'):
+                        code += ' ({msg})'.format(msg=info['msg'])
                 subproblems = content_json.pop('subproblems', None)
                 add_msg = ' {problem}.'.format(problem=format_error_problem(content_json))
                 extras['problem'] = content_json
@@ -114,6 +116,8 @@ class ACMEProtocolException(ModuleFailException):
                         )
             else:
                 code = 'HTTP status {code}'.format(code=format_http_status(code))
+                if code == -1 and info.get('msg'):
+                    code += ' ({msg})'.format(msg=info['msg'])
                 if content_json is not None:
                     add_msg = ' The JSON error result: {content}'.format(content=content_json)
                 elif content is not None: