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Uptime checks with Pingdom

06 January 2016

Monitoring

The fourth quarter of 2015 for our team at Mozilla was a really great one. Across the group we had a well rounded list of goals supporting project initiatives as well as ones that were forward facing. Among the forward facing goals, a few of the areas included improving our code quality and the exploration of new techniques and technologies for assessing project health.

I personally gravitated towards the latter when I was considering a deliverable. Over the past several years I've been keen on understanding the various roles that monitoring and logging tools play when accessing the health of complex software systems. I also want to see a checklist of practices emerge that our team can use when assessing a new or existing project.

Enter Pingdom

oneanddone.mozilla.org

For those that aren’t familiar with Pingdom, They provide several services. The one that I was interested in was uptime monitoring; a simplified description might be a service that on a chosen time interval pings a specific URL to see if the server responds with an acknowledgement that the resource can be served. If the server responds, Pingdom happily logs that the service can be reached. While this may not sound very interesting, no news is something of a good thing when uptime is involved. The interesting part of this story begins when a service is unreachable and Pingdom notices this.

Pingdom will immediately initiate what they call a root cause analysis, or simply, servers they run that are hosted in different locations will try to ping the offending URL. The clever goal in this is that Pingdom is trying to determine if the outage your service is experiencing is specific to a region or is global. Once the scope of the outage has been probed, Pingdom can be configured to send a notification to specific users, via email or text message.

When configured to hit the appropriate endpoints, an uptime tool such as Pingdom is a good catchall to check if a service is having uptime difficulty. It’s a bit of a brutish tool insofar as it’s not very good at helping debug a problem and should be used as a notifier that “something” went wrong and requires deeper investigation.

At this point I stopped my investigation; I had a working setup using a private instance of Pingdom that touched both our production and stage environment for oneanddone.mozilla.org. I also had a steady stream of data and had a feel for how and where Pingdom is useful. OneandDone is hosted on Heroku, a colleague learned that their is a push button solution for Pingdom. At this point we decided to forego using Datadog in leu of the Heroku integration. We also decided to use Heroku’s integrated Pingdom mechanism instead due to built in simplicity as well as billing cost centers.

Pingdom

Final thoughts

An important discussion that QA teams need to consider is formulating opinions and expertise around monitoring solutions. These need to become an additional dimension that is included in test plans.

Understanding available strategies and how to advocate for their inclusion on a project is vital. In my opinion, it’s also important for test practitioners to know how to configure and implement these solutions. In the continued move towards the dev/ops world of thinking, QA teams have additional areas of expertise that they need to be investing in.

If you’re interested, here is the specific goal I submitted:

As real-time monitoring solutions become the norm it's important that QA stay abreast of the latest data driven monitoring techniques. The use of Pingdom coupled with dashboards can be used to reduce risk on projects.

This goal seeks to pair these tools and implement them on our own, team supported web project. Once this is done, we can use our experience to make suggestions for other projects as well as have a better understanding how to integrate this data feed with our existing testing plans.

  • Add monitoring to oneanddone.mozilla.org [production and stage] - Integrate Pingdom and DataDog
  • Add an uptime check to Pingdom that includes downtime and root cause analysis
  • Integrate Pingdom reporting with DataDog
  • Write a blog post that discusses outcomes and recommendations for other projects. The post will broach the topic of dev/ops and qa/ops roles.


This entry was tagged as testing mozilla

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