- Check Amazon RDS metrics.


Usage: [options]
  -h, --help            show this help message and exit
  -l, --list            list of all DB instances
  -n PROFILE, --profile-name=PROFILE
                        AWS profile from ~/.boto or /etc/boto.cfg. Default:
                        None, fallbacks to "[Credentials]".
  -r REGION, --region=REGION
                        AWS region. Default: us-east-1. If set to "all", we
                        try to detect the instance region across all of them,
                        note this will be slower than you specify the region.
  -i IDENT, --ident=IDENT
                        DB instance identifier
  -p, --print           print status and other details for a given DB instance
  -m METRIC, --metric=METRIC
                        metric to check: [status, load, storage, memory]
  -w WARN, --warn=WARN  warning threshold
  -c CRIT, --crit=CRIT  critical threshold
  -u UNIT, --unit=UNIT  unit of thresholds for "storage" and "memory" metrics:
                        [percent, GB]. Default: percent
  -t TIME, --time=TIME  time period in minutes to query. Default: 5
  -a AVG, --avg=AVG     time average in minutes to request. Default: 1
  -f, --forceunknown    force alerts on unknown status. This prevents issues
                        related to AWS Cloudwatch throttling limits Default:
  -d, --debug           enable debug output


This plugin is written on Python and utilizes the module boto (Python interface to Amazon Web Services) to get various RDS metrics from CloudWatch and compare them against the thresholds.

This plugin that is supposed to be run by Nagios, i.e. under nagios user, should have permissions to read the config /etc/boto.cfg or ~nagios/.boto.


[root@centos6 ~]# cat /etc/boto.cfg
aws_access_key_id = THISISATESTKEY
aws_secret_access_key = thisisatestawssecretaccesskey

If you do not use this config with other tools such as our Cacti script, you can secure this file the following way:

[root@centos6 ~]# chown nagios /etc/boto.cfg
[root@centos6 ~]# chmod 600 /etc/boto.cfg


The plugin provides 4 checks and some options to list and print RDS details:

  • RDS Status
  • RDS Load Average
  • RDS Free Storage
  • RDS Free Memory

To get the list of all RDS instances under AWS account:

# ./ -l

To get the detailed status of RDS instance identified as blackbox:

# ./ -i blackbox -p

Nagios check for the overall status. Useful if you want to set the rest of the checks dependent from this one:

# ./ -i blackbox -m status
OK mysql 5.1.63. Status: available

Nagios check for CPU utilization, specify thresholds as percentage of 1-min., 5-min., 15-min. average accordingly:

# ./ -i blackbox -m load -w 90,85,80 -c 98,95,90
OK Load average: 18.36%, 18.51%, 15.95% | load1=18.36;90.0;98.0;0;100 load5=18.51;85.0;95.0;0;100 load15=15.95;80.0;90.0;0;100

Nagios check for the free memory, specify thresholds as percentage:

# ./ -i blackbox -m memory -w 5 -c 2
OK Free memory: 5.90 GB (9%) of 68 GB | free_memory=8.68;5.0;2.0;0;100
# ./ -i blackbox -m memory -u GB -w 4 -c 2
OK Free memory: 5.90 GB (9%) of 68 GB | free_memory=5.9;4.0;2.0;0;68

Nagios check for the free storage space, specify thresholds as percentage or GB:

# ./ -i blackbox -m storage -w 10 -c 5
OK Free storage: 162.55 GB (33%) of 500.0 GB | free_storage=32.51;10.0;5.0;0;100
# ./ -i blackbox -m storage -u GB -w 10 -c 5
OK Free storage: 162.55 GB (33%) of 500.0 GB | free_storage=162.55;10.0;5.0;0;500.0

By default, the region is set to us-east-1. You can re-define it globally in boto config or specify with -r option. The following command will list all instances across all regions under your AWS account:

# ./ -r all -l

The following command will show the status for the first instance identified as blackbox in all regions:

# ./ -r all -i blackbox -p

Remember, scanning regions are slower operation than specifying it explicitly.


Here is the excerpt of potential Nagios config:

define host{
      use                             mysql-host
      host_name                       blackbox
      alias                           blackbox
define servicedependency{
      host_name                       blackbox
      service_description             RDS Status
      dependent_service_description   RDS Load Average, RDS Free Storage, RDS Free Memory
      execution_failure_criteria      w,c,u,p
      notification_failure_criteria   w,c,u,p
define service{
      use                             active-service
      host_name                       blackbox
      service_description             RDS Status
      check_command                   check_rds!status!0!0
define service{
      use                             active-service
      host_name                       blackbox
      service_description             RDS Load Average
      check_command                   check_rds!load!90,85,80!98,95,90
define service{
      use                             active-service
      host_name                       blackbox
      service_description             RDS Free Storage
      check_command                   check_rds!storage!10!5
define service{
      use                             active-service
      host_name                       blackbox
      service_description             RDS Free Memory
      check_command                   check_rds!memory!5!2
define command{
      command_name    check_rds
      command_line    $USER1$/ -i $HOSTALIAS$ -m $ARG1$ -w $ARG2$ -c $ARG3$


Percona Monitoring Plugins 1.1.8

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