Ethan's check_cluster

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@52 f882894a-f735-0410-b71e-b25c423dba1c

contrib/check_cluster.c

@@ -0,0 +1,332 @@
+/*****************************************************************************
+ *
+ * CHECK_CLUSTER.C - Host and Service Cluster Plugin for NetSaint
+ *
+ * Copyright (c) 2000 Ethan Galstad (netsaint@netsaint.org)
+ * License: GPL
+ * Last Modified:   07-08-2000
+ *
+ * License:
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *****************************************************************************/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#define OK		0
+#define ERROR		-1
+
+#define TRUE		1
+#define FALSE		0
+
+#define CHECK_SERVICES	1
+#define CHECK_HOSTS	2
+
+#define MAX_INPUT_BUFFER	1024
+
+#define STATE_OK	0
+#define STATE_WARNING	1
+#define STATE_CRITICAL	2
+#define STATE_UNKNOWN	3
+
+typedef struct clustermember_struct{
+	char *host_name;
+	char *svc_description;
+	struct clustermember_struct *next;
+        }clustermember;
+
+
+int check_cluster_status(void);
+int add_clustermember(char *,char *);
+void free_memory(void);
+
+clustermember *clustermember_list=NULL;
+
+int total_services_ok=0;
+int total_services_warning=0;
+int total_services_unknown=0;
+int total_services_critical=0;
+
+int total_hosts_up=0;
+int total_hosts_down=0;
+int total_hosts_unreachable=0;
+
+char status_log[MAX_INPUT_BUFFER]="";
+int warning_threshold=0;
+int critical_threshold=0;
+
+int check_type=CHECK_SERVICES;
+
+
+int main(int argc, char **argv){
+	char input_buffer[MAX_INPUT_BUFFER];
+	char *host_name;
+	char *svc_description;
+	int return_code=STATE_OK;
+	int error=FALSE;
+
+	if(argc!=5){
+
+		printf("Invalid arguments supplied\n");
+		printf("\n");
+
+		printf("Host/Service Cluster Plugin for NetSaint\n");
+		printf("Copyright (c) 2000 Ethan Galstad (netsaint@netsaint.org)\n");
+		printf("Last Modified: 07-08-2000\n");
+		printf("License: GPL\n");
+		printf("\n");
+		printf("Usage: %s <--service | --host> <status_log> <warn_threshold> <crit_threshold>\n",argv[0]);
+		printf("\n");
+		printf("Options:\n");
+		printf("   --service        = Check service cluster status\n");
+		printf("   --host           = Check host cluster status\n");
+		printf("   <status_log>     = This is the location of the NetSaint status log\n");
+		printf("   <warn_threshold> = This is the number of hosts or services in\n");
+		printf("                      the cluster that must be in a non-OK state\n");
+		printf("                      in order to result in a warning status level\n");
+		printf("   <crit_threshold> = This is the number of hosts or services in\n");
+		printf("                      the cluster that must be in a non-OK state\n");
+		printf("                      in order to result in a critical status level\n");
+		printf("\n");
+		printf("Notes:\n");
+		printf("Members of the host or service cluster are read from STDIN.\n");
+		printf("One host or service can be specified per line, services must\n");
+		printf("be in the format of <host_name>;<svc_description>\n");
+		printf("\n");
+
+		return STATE_UNKNOWN;
+	        }
+
+	/* see if we're checking a host or service clust */
+	if(!strcmp(argv[1],"--host"))
+		check_type=CHECK_HOSTS;
+	else
+		check_type=CHECK_SERVICES;
+
+	/* get the status log */
+	strncpy(status_log,argv[2],sizeof(status_log)-1);
+	status_log[sizeof(status_log)-1]='\x0';
+
+	/* get the warning and critical thresholds */
+	warning_threshold=atoi(argv[3]);
+	critical_threshold=atoi(argv[4]);
+
+
+	/* read all data from STDIN until there isn't anymore */
+	while(fgets(input_buffer,sizeof(input_buffer)-1,stdin)){
+
+		if(feof(stdin))
+			break;
+
+		/*strip(input_buffer);*/
+
+		if(!strcmp(input_buffer,""))
+			continue;
+
+		if(!strcmp(input_buffer,"\n"))
+			continue;
+
+		/* get the host name */
+		if(check_type==CHECK_SERVICES)
+			host_name=(char *)strtok(input_buffer,";");
+		else
+			host_name=(char *)strtok(input_buffer,"\n");
+		if(host_name==NULL || !strcmp(host_name,"")){
+			printf("Error: Host name is NULL!\n");
+			continue;
+		        }
+
+		if(check_type==CHECK_SERVICES){
+
+			/* get the service description */
+			svc_description=(char *)strtok(NULL,"\n");
+			if(svc_description==NULL || !strcmp(svc_description,"")){
+				printf("Error: Service description is NULL!\n");
+				continue;
+			        }
+		        }
+
+		/* add the cluster member to the list in memory */
+		if(add_clustermember(host_name,svc_description)!=OK)
+			printf("Error: Could not add cluster member\n");
+#ifdef DEBUG
+		else
+			printf("Added cluster member\n");
+#endif
+	        }
+
+
+	/* check the status of the cluster */
+	if(check_cluster_status()==OK){
+	
+		if(check_type==CHECK_SERVICES){
+			if((total_services_warning+total_services_unknown+total_services_critical) >= critical_threshold)
+				return_code=STATE_CRITICAL;
+			else if((total_services_warning+total_services_unknown+total_services_critical) >= warning_threshold)
+				return_code=STATE_WARNING;
+			else
+				return_code=STATE_OK;
+		
+			printf("Service cluster %s: %d ok, %d warning, %d unknown, %d critical\n",(return_code==STATE_OK)?"ok":"problem",total_services_ok,total_services_warning,total_services_unknown,total_services_critical);
+	                }
+		else{
+			if((total_hosts_down+total_hosts_unreachable) >= critical_threshold)
+				return_code=STATE_CRITICAL;
+			else if((total_hosts_down+total_hosts_unreachable) >= warning_threshold)
+				return_code=STATE_WARNING;
+			else
+				return_code=STATE_OK;
+
+			printf("Host cluster %s: %d up, %d down, %d unreachable\n",(return_code==STATE_OK)?"ok":"problem",total_hosts_up,total_hosts_down,total_hosts_unreachable);
+	                }
+	        }
+	else
+		return_code=STATE_UNKNOWN;
+
+	free_memory();
+
+	return return_code;
+        }
+
+
+
+int add_clustermember(char *hst,char *svc){
+	clustermember *new_clustermember;
+
+	new_clustermember=(clustermember *)malloc(sizeof(clustermember));
+	if(new_clustermember==NULL)
+		return ERROR;
+
+	new_clustermember->host_name=NULL;
+	new_clustermember->svc_description=NULL;
+
+	if(hst!=NULL){
+		new_clustermember->host_name=(char *)malloc(strlen(hst)+1);
+		if(new_clustermember->host_name==NULL){
+			free(new_clustermember);
+			return ERROR;
+		        }
+		strcpy(new_clustermember->host_name,hst);
+	        }
+
+	if(svc!=NULL){
+		new_clustermember->svc_description=(char *)malloc(strlen(svc)+1);
+		if(new_clustermember->svc_description==NULL){
+			if(new_clustermember->host_name!=NULL)
+				free(new_clustermember->host_name);
+			free(new_clustermember);
+			return ERROR;
+		        }
+		strcpy(new_clustermember->svc_description,svc);
+	        }
+
+	new_clustermember->next=clustermember_list;
+	clustermember_list=new_clustermember;
+
+	return OK;
+        }
+
+
+void free_memory(void){
+	clustermember *this_clustermember;
+	clustermember *next_clustermember;
+
+	for(this_clustermember=clustermember_list;this_clustermember!=NULL;this_clustermember=next_clustermember){
+		next_clustermember=this_clustermember->next;
+		if(this_clustermember->host_name!=NULL)
+			free(this_clustermember->host_name);		
+		if(this_clustermember->svc_description!=NULL)
+			free(this_clustermember->svc_description);
+		free(this_clustermember);
+	        }
+
+	return;
+        }
+
+
+
+int check_cluster_status(void){
+	FILE *fp;
+	clustermember *temp_clustermember;
+	char input_buffer[MAX_INPUT_BUFFER];
+	char matching_entry[MAX_INPUT_BUFFER];
+
+	fp=fopen(status_log,"r");
+	if(fp==NULL){
+		printf("Error: Could not open status log '%s' for reading\n",status_log);
+		return ERROR;
+	        }
+
+#ifdef DEBUG
+	for(temp_clustermember=clustermember_list;temp_clustermember!=NULL;temp_clustermember=temp_clustermember->next){
+		if(check_type==CHECK_HOSTS)
+			printf("Cluster member: '%s'\n",temp_clustermember->host_name);
+		else
+			printf("Cluster member: '%s'/'%s'\n",temp_clustermember->host_name,temp_clustermember->svc_description);
+	        }
+#endif
+
+	for(fgets(input_buffer,MAX_INPUT_BUFFER-1,fp);!feof(fp);fgets(input_buffer,MAX_INPUT_BUFFER-1,fp)){
+
+		/* this is a host entry */
+		if(strstr(input_buffer,"] HOST;") && check_type==CHECK_HOSTS){
+
+			/* this this a match? */
+			for(temp_clustermember=clustermember_list;temp_clustermember!=NULL;temp_clustermember=temp_clustermember->next){
+
+				snprintf(matching_entry,sizeof(matching_entry)-1,";%s;",temp_clustermember->host_name);
+
+				if(strstr(input_buffer,matching_entry)){
+					if(strstr(input_buffer,";DOWN;"))
+						total_hosts_down++;
+					else if(strstr(input_buffer,";UNREACHABLE;"))
+						total_hosts_unreachable++;
+					else if(strstr(input_buffer,";UP;"))
+						total_hosts_up++;
+				        }
+			        }
+			
+		        }
+
+		/* this is a service entry */
+		else if(strstr(input_buffer,"] SERVICE;") && check_type==CHECK_SERVICES){
+
+			/* this this a match? */
+			for(temp_clustermember=clustermember_list;temp_clustermember!=NULL;temp_clustermember=temp_clustermember->next){
+
+				snprintf(matching_entry,sizeof(matching_entry)-1,";%s;%s;",temp_clustermember->host_name,temp_clustermember->svc_description);
+
+				if(strstr(input_buffer,matching_entry)){
+					if(strstr(input_buffer,";HOST DOWN;") || strstr(input_buffer,";UNREACHABLE;") || strstr(input_buffer,";CRITICAL;"))
+						total_services_critical++;
+					else if(strstr(input_buffer,";WARNING;"))
+						total_services_warning++;
+					else if(strstr(input_buffer,";UNKNOWN;"))
+						total_services_unknown++;
+					else if(strstr(input_buffer,";OK;") || strstr(input_buffer,";RECOVERY;"))
+						total_services_ok++;
+				        }
+			        }
+		
+		        }
+	        }
+
+	fclose(fp);
+
+	return OK;
+        }