pkg-monitoring-plugins/contrib/check_cluster.c

333 lines
9.7 KiB
C

/*****************************************************************************
*
* 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;
}