#check_elasticache.py
##Overview
This Nagios plugin allows you to check the status of an ElastiCache instance.
Instead of connecting directly to the instance, it will query AWS CloudWatch for some metrics.
##Setup
Install it in your Nagios plugins directory, create a Nagios command and start adding your service checks.
###Setup requirements
This script requires python 2.7, the Boto library and the following IAM permissions:
- elasticache:DescribeCacheClusters
- cloudwatch:GetMetricStatistics
##Usage
Some usage examples:
List all available ElastiCache clusters in us-east-1:
check_elasticache.py --region us-east-1 -l
Print all available information about the ElastiCache cluster 'cluster1'
check_elasticache.py --region us-east-1 -i cluster1 -p
Check the current status of 'cluster1'. Returns CRITICAL if status is not 'available'
check_elasticache.py --region us-east-1 -i cluster1 -m status
Check the current cpu of 'cluster1'. Will return WARNING or CRITICAL if the result is over the specified thresholds.
check_elasticache.py --region us-east-1 -i cluster1 -m cpu -w 90,85,80 -c 98,95,90
Check the current cpu of 'cluster1' but do not calculate the real thresholds when using redis
check_elasticache.py --region us-east-1 -i cluster1 -m cpu -w 90,85,80 -c 98,95,90 --no-threshold-calc
Check the current memory usage of 'cluster1'. Will return WARNING or CRITICAL if the result is over the specified thresholds.
check_elasticache.py --region us-east-1 -i cluster1 -m memory -w 10 -c 5
If 'cluster1' is memcache, it may have multiple nodes. Check memory from the second node.
check_elasticache.py --region us-east-1 -i cluster1 -m memory -w 10 -c 5 --node 2