Added service_config bundle to aid in service config check/replace/se…

…rvice restart

Ticket: ENT-11440
Changelog: title

lib/service_config.cf

@@ -0,0 +1,53 @@
+# todo, maybe chmod, user, group for config_final_path
+# check pid file for service stop/start?
+bundle agent service_config(service_name,
+                            config_template_path,
+                            config_final_path,
+                            validate_config_command,
+                            template_data)
+{
+reports:
+  "template_data is ${with}" with => storejson(template_data);
+  vars:
+    "staged_config" string => "$(config_final_path).staged";
+  methods:
+    "staged config rendered" usebundle => file_make_mustache( $(staged_config), $(config_template_path), @(template_data) );
+    "final config and restart" usebundle => validate_config_and_restart_service(
+        $(staged_config),
+        $(validate_config_command),
+        $(config_final_path),
+        $(service_name)
+    );
+
+
+}
+bundle agent validate_config_and_restart_service( staged_config, validate_config_command, config_final_path, service_name )
+{
+  files:
+    "$(config_final_path)"
+      copy_from => local_dcp( $(staged_config) ),
+      if => and(
+                isnewerthan( $(config_final_path), $(staged_config) ),
+                returnszero("$(validate_config_command) $(staged_config)", "useshell")
+               ),
+               classes => results("bundle", "$(service_name)_config");
+
+  services:
+    "$(service_name)"
+      service_policy => "stop",
+      if => and(
+                isnewerthan( $(config_final_path), $(staged_config) ),
+                returnszero("$(validate_config_command) $(staged_config)", "useshell")
+               ),
+     classes => results("bundle", "$(service_name)_stopped_after_validated_config");
+
+    "$(service_name)"
+      service_policy => "start",
+      if => and( "$(service_name)_config_repaired",
+                 "$(service_name)_stopped_after_validated_config_repaired");
+
+    "$(service_name)"
+      service_policy => "restart",
+      if => and( "$(service_name)_config_repaired",
+                 not( "$(service_name)_stoppoed_after_validated_config_repaired") );
+}

lib/stdlib.cf

@@ -39,6 +39,7 @@ bundle common stdlib_common
       "input[files]"                      string => "$(this.promise_dirname)/files.cf";
       "input[edit_xml]"                   string => "$(this.promise_dirname)/edit_xml.cf";
       "input[services]"                   string => "$(this.promise_dirname)/services.cf";
+      "input[service_config]" string => "$(this.promise_dirname)/service_config.cf";
       "input[processes]"                  string => "$(this.promise_dirname)/processes.cf";
       "input[storage]"                    string => "$(this.promise_dirname)/storage.cf";
       "input[databases]"                  string => "$(this.promise_dirname)/databases.cf";