/var/log/nagios3/nagios.log

/var/log/nagios3/nagios.log
/var/log/nagios3/archives/

OK | DOWN | ALERT | CRITICAL 

grep ALERT /var/log/nagios3/archives/*  /var/log/nagios3/nagios.log
grep CRITICAL /var/log/nagios3/archives/*  /var/log/nagios3/nagios.log

grep CRITICAL /var/log/nagios3/archives/*  /var/log/nagios3/nagios.log | egrep -v "Disk Space|Connection refused|Current Load|Socket timeout"

journalctl -u nagios3 | grep ALERT

[1695902343] SERVICE ALERT: localhost;Current Load;OK;HARD;1;OK - load average: 0.29, 3.05, 2.02

/var/log/nagios3/archives/nagios-11-11-2023-00.log:[1699592494] Warning: The check of service 'Disk Space' on host 'localhost' could not be performed due to a fork() error: 'Cannot allocate memory'.  The check will be rescheduled.

[1619568000] LOG ROTATION: DAILY
[1619568000] LOG VERSION: 2.0
[1619568000] CURRENT HOST STATE: localhost;UP;HARD;1;PING OK - Packet loss = 0%, RTA = 0.05 ms
[1619568000] CURRENT SERVICE STATE: localhost;Current Load;OK;HARD;1;OK - load average: 0.00, 0.00, 0.00
[1619568000] CURRENT SERVICE STATE: localhost;Current Users;OK;HARD;1;USERS OK - 0 users currently logged in
[1619568000] CURRENT SERVICE STATE: localhost;Disk Space;CRITICAL;HARD;4;DISK CRITICAL - free space: / 5055 MB (20% 
inode=94%): /snap/core18/1988 0 MB (0% inode=0%): /snap/yq/1040 0 MB (0% inode=0%): /snap/core/10908 0 MB (0% inode=0%): /snap/core18/1997 0 MB (0% inode=0%): /snap/core/10958 0 MB (0% inode=0%): /snap/yq/1077 0 MB (0% inode=0%):
[1619568000] CURRENT SERVICE STATE: localhost;HTTP;OK;HARD;1;HTTP OK: HTTP/1.1 301 Moved Permanently - 359 bytes in 0.000 second response time
[1619568000] CURRENT SERVICE STATE: localhost;SSH;CRITICAL;HARD;4;connect to address 127.0.0.1 and port 22: Connection refused
[1619568000] CURRENT SERVICE STATE: localhost;Total Processes;OK;HARD;1;PROCS OK: 109 processes
[1619571358] Auto-save of retention data completed successfully.
[1619574958] Auto-save of retention data completed successfully.
.../...

[1655769600] CURRENT HOST STATE: localhost;UP;HARD;1;PING OK - Packet loss = 0%, RTA = 0.05 ms
[1655769600] CURRENT SERVICE STATE: localhost;Current Load;OK;HARD;1;OK - load average: 0.07, 0.08, 0.02
[1655769600] CURRENT SERVICE STATE: localhost;Current Users;OK;HARD;1;USERS OK - 0 users currently logged in
[1655769600] CURRENT SERVICE STATE: localhost;Disk Space;CRITICAL;HARD;4;DISK CRITICAL - /sys/kernel/debug/tracing is not accessible: Permission denied
[1655769600] CURRENT SERVICE STATE: localhost;HTTP;OK;HARD;1;HTTP OK: HTTP/1.1 301 Moved Permanently - 359 bytes in 
0.004 second response time
[1655769600] CURRENT SERVICE STATE: localhost;SSH;CRITICAL;HARD;4;connect to address 127.0.0.1 and port 22: 
Connection refused
[1655769600] CURRENT SERVICE STATE: localhost;Total Processes;OK;HARD;1;PROCS OK: 103 processes

ALERT

[1702012007] SERVICE ALERT: localhost;Current Load;OK;HARD;1;OK - load average: 0.13, 1.10, 0.79

CRITICAL

[1626134420] SERVICE ALERT: localhost;HTTP;CRITICAL;SOFT;1;connect to address 127.0.0.1 and port 80: Connection refused

[1594324208] SERVICE ALERT: localhost;HTTP;CRITICAL;SOFT;1;CRITICAL - Socket timeout after 10 seconds

[1588658318] SERVICE ALERT: localhost;Disk Space;CRITICAL;SOFT;1;DISK CRITICAL - free space: /snap/core/8689 0 MB (0% inode=0%): /snap/core18/1650 0 MB (0% inode=0%): /snap/yq/574 0 MB (0% inode=0%): /snap/core/8592 0 MB (0% inode=0%): /snap/yq/491 0 MB (0% inode=0%): /snap/core18/1668 0 MB (0% inode=0%):

[1701925307] SERVICE ALERT: localhost;Current Load;CRITICAL;HARD;1;CRITICAL - load average: 16.28, 5.36, 1.94

Related

• grep nagios3
• /var/log/nagios3/archives/
• journalctl -u nagios

See also

• Nagios, NRPE, Nagios Cross-Platform Agent (NCPA), nagios.cfg, nrpe, nagios4, nagios3, nagios3stats, check_http, Monitoring-plugins, /usr/lib/nagios/plugins/, Nagios logs, nagios.cfg