nelbren / check_mem

Nagios plugin for checking available memory and swap on a *nix* machine.

check_mem

Nagios plugin for checking available memory and swap on a nix machine. Tested working on several nix flavors including:

• Linux-3.10.0-327.4.4.el7.x86_64-x86_64-with-centos-7.2.1511-Core
• Linux-3.16.0-30-generic-x86_64-with-Ubuntu-14.04-trusty
• Linux-2.6.32-358.2.1.el6.x86_64-x86_64-with-redhat-6.4-Santiago
• Linux-2.6.32-504.16.2.el6.x86_64-x86_64-with-centos-6.5-Final
• Linux-2.6.32-504.el6.x86_64-x86_64-with-centos-6.6-Final

Prerequisites

Requires custom nagpyrc library for generating the Nagios return codes and perfdata in the right format

pip install nagpyrc

Usage

Usage: Basic check with no arguments, defaults to warn on 90% memory usage and critical on 95% memory usage. Swap warning/critical defaults to 75% and 90% respectively.

[root@SERVER] ~]# python check_mem.py

Output

OK MEMORY:::: Total: 1840 MB - Used: 148 MB - 8.07% used --- SWAP:::: Used: 1 MB - 0.07% used  ; | 'USED'=155623424B;;;; 'TOTAL'=1929613312B;;;; 'SWAP_USED'=1249280B;;;; 'SWAP_TOTAL'=1719660544B;;;; 'MEM_USED_PCT'=8.07%;;;; 'SWAP_USED_PCT'=0.07%;;;;

Check memory, warn at 3% usage, critical at 4% usage return proper Nagios return code if thresholds are reached.

[root@DOANTEST07 ~]# python check_mem.py -w 3 -c 4

Output

CRITICAL MEMORY:::: Total: 1840 MB - Used: 148 MB - 8.09% used --- SWAP:::: Used: 1 MB - 0.07% used  ; | 'USED'=156078080B;;;; 'TOTAL'=1929613312B;;;; 'SWAP_USED'=1249280B;;;; 'SWAP_TOTAL'=1719660544B;;;; 'MEM_USED_PCT'=8.09%;;;; 'SWAP_USED_PCT'=0.07%;;;;

check memory and gather perfdata but check will always return 1 "OK" even if threshold is reached

[root@DOANTEST07 ~]# python check_mem.py -w 3 -c 4 --perfdata_only yes

Output

OK MEMORY:::: Total: 1840 MB - Used: 148 MB - 8.08% used --- SWAP:::: Used: 1 MB - 0.07% used  ; | 'USED'=155918336B;;;; 'TOTAL'=1929613312B;;;; 'SWAP_USED'=1249280B;;;; 'SWAP_TOTAL'=1719660544B;;;; 'MEM_USED_PCT'=8.08%;;;; 'SWAP_USED_PCT'=0.07%;;;;

License

MIT