Monitoring Redis

This guide helps you configure Monitoring to monitor Redis.

Redis is an open source advanced key-value store. It is often referred to as a data structure server since values can contain strings, hashes, lists, sets and sorted sets. For more information, visit redis.io.

This functionality is only available for agents running on Linux. It is not available on Windows.

Note: You can now collect metrics from your Redis instance using the Ops Agent, the primary and preferred agent for collecting telemetry from your Compute Engine instances. For details, see configuring the Ops Agent for Redis.

Discovery

Monitoring discovers Redis services running in your Cloud Platform project if you have the following:

• VM instances with redis in their names.
• Firewall rules that open port 6379.

To see the metrics for Redis, go to Monitoring:

Go to Monitoring

Select Dashboards and then select the Redis dashboard from the list.

Configuring Redis monitoring

The Monitoring agent uses the hiredis client library to monitor Redis. After installing Redis, install hiredis by running the following commands:

• RHEL and CentOS

      sudo yum install epel-release
      sudo yum install hiredis
  

• Ubuntu 18.04 LTS, 16.04 LTS, and Debian 9

      sudo apt-get install libhiredis0.13
  

• SLES

      sudo zypper install libhiredis0_13
  

Configuring Monitoring

To monitor Redis, perform the following actions on your VM instance after installing the monitoring agent:

1. Install the Redis configuration file, redis.conf, by running the following command:

   (cd /etc/stackdriver/collectd.d/ && sudo curl -O https://raw.githubusercontent.com/Stackdriver/stackdriver-agent-service-configs/master/etc/collectd.d/redis.conf)
   

2. If your Redis instance is password-protected, or if you are using a nonstandard host or port for Redis, as root, edit redis.conf by following the instructions at the top of the file.

3. Restart the monitoring agent by running the following command:

   sudo service stackdriver-agent restart
   

For more information on the collectd redis plugin, see Plugin:Redis.

Redis metrics

The full list of metrics the Redis plugin monitors is at Agent metrics: redis. The actual metrics collected, and the metrics available in the Monitoring menus, can vary.