Add host_down_disable_service_checks config option

Add option to *not* check services if their host is down.

references:
      - NagiosEnterprises/nagioscore@05e1dda

sample-config/naemon.cfg.in

@@ -1024,6 +1024,16 @@ allow_empty_hostgroup_assignment=0
 
 #check_workers=3
 
+
+# DISABLE SERVICE CHECKS WHEN HOST DOWN
+# This option will disable all service checks if the host is not in an UP state
+#
+# While desirable in some environments, enabling this value can distort report
+# values as the expected quantity of checks will not have been performed
+
+#host_down_disable_service_checks=0
+
+
 # CIRCULAR DEPENDENCIES (EXPERIMENTAL)
 # Allow for circular dependencies in naemon's host graph.
 # Enabaling this will cause propagation the following to stop working:

src/naemon/checks_service.c

@@ -140,6 +140,7 @@ static void handle_service_check_event(struct nm_event_execution_properties *evp
 	struct timeval tv;
 	struct timeval event_runtime;
 	int options = temp_service->check_options;
+	host *temp_host = NULL;
 
     log_debug_info(DEBUGL_CHECKS, 0, "Service '%s' on host '%s' handle_service_check_event()...\n", temp_service->description, temp_service->host_name);
 
@@ -200,6 +201,18 @@ static void handle_service_check_event(struct nm_event_execution_properties *evp
 				return;
 			}
 
+			/* check if host is up - if not, do not perform check */
+			if(host_down_disable_service_checks) {
+				if((temp_host = temp_service->host_ptr) == NULL) {
+					log_debug_info(DEBUGL_CHECKS, 2, "Host pointer NULL in handle_service_check_event().\n");
+					return;
+				} else {
+					if(temp_host->current_state != STATE_UP) {
+						log_debug_info(DEBUGL_CHECKS, 2, "Host state not UP, so service check will not be performed - will be rescheduled as normal.\n");
+						return;
+					}
+				}
+			}
 		}
 
 		/* Otherwise, run the event */

src/naemon/configuration.c

@@ -1058,6 +1058,8 @@ read_config_file(const char *main_config_file, nagios_macros *mac)
 			allow_empty_hostgroup_assignment = (atoi(value) > 0) ? TRUE : FALSE;
 		} else if (!strcmp(variable, "allow_circular_dependencies")) {
 			allow_circular_dependencies=atoi(value);
+		} else if(!strcmp(variable,"host_down_disable_service_checks")) {
+			host_down_disable_service_checks = strtoul(value, NULL, 0);
 		}
 		/* skip external data directives */
 		else if (strstr(input, "x") == input)

src/naemon/defaults.h

@@ -86,6 +86,7 @@
 
 #define DEFAULT_ALLOW_EMPTY_HOSTGROUP_ASSIGNMENT        2        /* Allow assigning to empty hostgroups by default, but warn about it */
 #define DEFAULT_ALLOW_CIRCULAR_DEPENDENCIES             0        /* Allow circular depdendencies */
+#define DEFAULT_HOST_DOWN_DISABLE_SERVICE_CHECKS        0        /* run service checks if the host is down */
 
 #define DEFAULT_HOST_PERFDATA_FILE_TEMPLATE "[HOSTPERFDATA]\t$TIMET$\t$HOSTNAME$\t$HOSTEXECUTIONTIME$\t$HOSTOUTPUT$\t$HOSTPERFDATA$"
 #define DEFAULT_SERVICE_PERFDATA_FILE_TEMPLATE "[SERVICEPERFDATA]\t$TIMET$\t$HOSTNAME$\t$SERVICEDESC$\t$SERVICEEXECUTIONTIME$\t$SERVICELATENCY$\t$SERVICEOUTPUT$\t$SERVICEPERFDATA$"

src/naemon/globals.h

@@ -144,6 +144,7 @@ extern unsigned long max_debug_file_size;
 
 extern int allow_empty_hostgroup_assignment;
 extern int allow_circular_dependencies;
+extern int host_down_disable_service_checks;
 
 extern time_t last_program_stop;
 extern time_t event_start;

src/naemon/utils.c

@@ -164,6 +164,7 @@ char *use_timezone = NULL;
 
 int allow_empty_hostgroup_assignment = DEFAULT_ALLOW_EMPTY_HOSTGROUP_ASSIGNMENT;
 int allow_circular_dependencies = DEFAULT_ALLOW_CIRCULAR_DEPENDENCIES;
+int host_down_disable_service_checks = DEFAULT_HOST_DOWN_DISABLE_SERVICE_CHECKS;
 
 static long long check_file_size(char *, unsigned long, struct rlimit);