caddy-frontend: Add error reporting to slave requester

Each slave rejected by the frontend will report back detailed information
to slave requester in key request-error-list being [json_list_of_found_errors]

software/caddy-frontend/buildout.hash.cfg

@@ -26,7 +26,7 @@ md5sum = 750e2b1c922bf14511a3bc8a42468b1b
 
 [template-apache-replicate]
 filename = instance-apache-replicate.cfg.in
-md5sum = aaac56847a966ec4f155cba10570bb3c
+md5sum = 1576859772052bcb85ff2b5a7b786410
 
 [template-slave-list]
 filename = templates/apache-custom-slave-list.cfg.in
@@ -38,7 +38,7 @@ md5sum = 54ae95597a126ae552c3a913ddf29e5e
 
 [template-replicate-publish-slave-information]
 filename = templates/replicate-publish-slave-information.cfg.in
-md5sum = 6a308c29b54d53cfd82ae23ba77a35dd
+md5sum = 01efde8febafcff6dde2ebb43e75a9e4
 
 [template-caddy-frontend-configuration]
 filename = templates/Caddyfile.in

software/caddy-frontend/instance-apache-replicate.cfg.in

@@ -194,6 +194,11 @@ replicate = ${dynamic-publish-slave-information:rendered}
 custom-personal = ${dynamic-publish-slave-information:rendered}
 custom-group = ${dynamic-publish-slave-information:rendered}
 
+[rejected-slave-information]
+{% for slave_id, rejected_list in rejected_slave_dict.iteritems() %}
+{{ slave_id }} = {{ dumps(json_module.dumps(rejected_list)) }}
+{% endfor %}
+
 [slave-information]
 {% for frontend_section in frontend_section_list %}
 {{ frontend_section }} = {{ "${%s:connection-slave-instance-information-list}" % frontend_section }}
@@ -206,6 +211,7 @@ filename = dynamic-publish-slave-information.cfg
 extensions = jinja2.ext.do
 extra-context =
     section slave_information slave-information
+    section rejected_slave_information rejected-slave-information
 
 [monitor-conf-parameters]
 monitor-url-list +=

software/caddy-frontend/instance-slave-output-schema.json

@@ -29,6 +29,10 @@
     "url": {
       "description": "Default URL provided",
       "type": "string"
+    },
+    "request-error-list": {
+      "description": "In case if slave has been rejected by master or has error in the request, the list contains information about each problem",
+      "type": "string"
     }
   },
   "type": "object"

software/caddy-frontend/templates/replicate-publish-slave-information.cfg.in

@@ -27,6 +27,13 @@
 {%   endfor %}
 {% endfor %}
 
+{% for slave_reference, rejected_info_list in rejected_slave_information.iteritems() %}
+{%   if slave_reference not in slave_information_dict %}
+{%     do slave_information_dict.__setitem__(slave_reference, {}) %}
+{%   endif %}
+{%   do slave_information_dict[slave_reference].__setitem__('request-error-list', rejected_info_list) %}
+{% endfor %}
+
 # Publish information for each slave
 {% for slave_reference, slave_information in slave_information_dict.iteritems() %}
 {%   set publish_section_title = 'publish-%s' % slave_reference %}
@@ -34,9 +41,12 @@
 [{{ publish_section_title }}]
 recipe = slapos.cookbook:publish
 -slave-reference = {{ slave_reference }}
-log-access-url = {{ json_module.dumps(slave_information.pop('log-access-urls', 1000)) }}
+{% set log_access_url = slave_information.pop('log-access-urls', None) %}
+{% if log_access_url %}
+log-access-url = {{ dumps(json_module.dumps(log_access_url)) }}
+{% endif %}
 {%   for key, value in slave_information.iteritems() %}
-{{ key }} = {{ value }}
+{{ key }} = {{ dumps(value) }}
 {%   endfor %}
 {% endfor %}
 
@@ -45,4 +55,4 @@ extends = {{ common_profile }}
 parts =
 {% for part in part_list %}
 {{ '  %s' % part }}
-{% endfor %}
+{% endfor %}
\ No newline at end of file

software/caddy-frontend/test/test.py

@@ -2069,7 +2069,11 @@ http://apachecustomhttpsaccepted.example.com:%%(http_port)s {
   def test_apache_custom_http_s_rejected(self):
     parameter_dict = self.slave_connection_parameter_dict_dict[
       'apache_custom_http_s-rejected']
-    self.assertEqual({}, parameter_dict)
+    self.assertEqual(
+      {
+        'request-error-list': '["slave not authorised"]'
+      },
+      parameter_dict)
     slave_configuration_file_list = glob.glob(os.path.join(
       self.instance_path, '*', 'etc', '*slave-conf.d', '*.conf'))
     # no configuration file contains provided custom http
@@ -2143,7 +2147,11 @@ http://apachecustomhttpsaccepted.example.com:%%(http_port)s {
   def test_caddy_custom_http_s_rejected(self):
     parameter_dict = self.slave_connection_parameter_dict_dict[
       'caddy_custom_http_s-rejected']
-    self.assertEqual({}, parameter_dict)
+    self.assertEqual(
+      {
+        'request-error-list': '["slave not authorised"]'
+      },
+      parameter_dict)
     slave_configuration_file_list = glob.glob(os.path.join(
       self.instance_path, '*', 'etc', '*slave-conf.d', '*.conf'))
     # no configuration file contains provided custom http
@@ -2680,14 +2688,22 @@ class TestMalformedBackenUrlSlave(SlaveHttpFrontendTestCase,
     parameter_dict = self.slave_connection_parameter_dict_dict[
       'url'].copy()
     self.assertEqual(
-      parameter_dict, {}
+      parameter_dict,
+      {
+        'request-error-list': '["slave url \\"https://[fd46::c2ae]:!py!'
+        'u\'123123\'\\" invalid"]'
+      }
     )
 
   def test_https_url(self):
     parameter_dict = self.slave_connection_parameter_dict_dict[
       'https-url'].copy()
     self.assertEqual(
-      parameter_dict, {}
+      parameter_dict,
+      {
+        'request-error-list': '["slave https-url \\"https://[fd46::c2ae]:'
+        '!py!u\'123123\'\\" invalid"]'
+      }
     )
 
 
@@ -3048,7 +3064,11 @@ https://www.google.com {}""",
       'custom_domain-unsafe']
     self.assertEqual(
       parameter_dict,
-      {}
+      {
+        'request-error-list':
+        '["custom_domain \'${section:option} afterspace\\\\nafternewline\' '
+        'invalid"]'
+      }
     )
 
   def test_server_alias_unsafe(self):
@@ -3056,7 +3076,11 @@ https://www.google.com {}""",
       'server-alias-unsafe']
     self.assertEqual(
       parameter_dict,
-      {}
+      {
+        'request-error-list':
+        '["server-alias \'${section:option}\' not valid", "server-alias '
+        '\'afterspace\' not valid"]'
+      }
     )
 
   def test_virtualhostroot_http_port_unsafe(self):
@@ -3239,7 +3263,7 @@ https://www.google.com {}""",
       'ssl_key-ssl_crt-unsafe']
     self.assertEqual(
       parameter_dict,
-      {}
+      {'request-error-list': '["slave ssl_key and ssl_crt does not match"]'}
     )
 
   def test_caddy_custom_http_s_reject(self):
@@ -3247,7 +3271,11 @@ https://www.google.com {}""",
       'caddy_custom_http_s-reject']
     self.assertEqual(
       parameter_dict,
-      {}
+      {
+        'request-error-list':
+        '["slave caddy_custom_http configuration invalid", '
+        '"slave caddy_custom_https configuration invalid"]'
+      }
     )
 
 
@@ -3299,16 +3327,28 @@ class TestDuplicateSiteKeyProtection(SlaveHttpFrontendTestCase, TestDataMixin):
       'rejected-slave-amount': '3',
       'slave-amount': '4',
       'rejected-slave-dict':
-      '{"_site_4": ["custom_domain clashes", "server-alias '
-      '\'duplicate.example.com\' clashes"], "_site_1": '
-      '["custom_domain clashes"], "_site_3": ["server-alias '
-      '\'duplicate.example.com\' clashes"]}'}
+      '{"_site_4": ["custom_domain \'duplicate.example.com\' clashes", '
+      '"server-alias \'duplicate.example.com\' clashes"], "_site_1": '
+      '["custom_domain \'duplicate.example.com\' clashes"], "_site_3": '
+      '["server-alias \'duplicate.example.com\' clashes"]}'
+    }
 
     self.assertEqual(
       expected_parameter_dict,
       parameter_dict
     )
 
+  def test_site_1(self):
+    parameter_dict = self.slave_connection_parameter_dict_dict[
+      'site_1']
+    self.assertEqual(
+      parameter_dict,
+      {
+        'request-error-list':
+        '["custom_domain \'duplicate.example.com\' clashes"]'
+      }
+    )
+
   def test_site_2(self):
     parameter_dict = self.slave_connection_parameter_dict_dict[
       'site_2']
@@ -3324,3 +3364,26 @@ class TestDuplicateSiteKeyProtection(SlaveHttpFrontendTestCase, TestDataMixin):
         'public-ipv4': LOCAL_IPV4,
       }
     )
+
+  def test_site_3(self):
+    parameter_dict = self.slave_connection_parameter_dict_dict[
+      'site_3']
+    self.assertEqual(
+      parameter_dict,
+      {
+        'request-error-list':
+        '["server-alias \'duplicate.example.com\' clashes"]'
+      }
+    )
+
+  def test_site_4(self):
+    parameter_dict = self.slave_connection_parameter_dict_dict[
+      'site_4']
+    self.assertEqual(
+      parameter_dict,
+      {
+        'request-error-list':
+        '["custom_domain \'duplicate.example.com\' clashes", "server-alias '
+        '\'duplicate.example.com\' clashes"]'
+      }
+    )