Site Reliability Engineering

Running reliable production systems

A primer on SRE for engineering leaders

Site Reliability Engineering (SRE) is the outcome of combining system operations responsibilities with software development.
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Incident repro & playbook validation for SREs

Tammy Butow (Principal SRE @ Gremlin) and Robert Ross (CEO @ Firehydrant) discuss how SREs can being proactive with Chaos Engineering

SRE Best Practices for Incident Management

Learn about the rise of Site Reliability Engineering, and how the role of this type of incident management can not only coexist with, but also strengthen a DevOps approach to development.
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The SRE reliability hierarchy

SRE's primary job is making and keeping a service and an application reliable, and this involves a lot of moving pieces! The following graph shows the Service Reliability Hierarchy, according to Google. Scroll over each layer to see how Chaos Engineering can help.
Product
Development
Capacity planning
Testing + release procedures
Postmortem analysis
Incident response
Monitoring

SREs and Chaos Engineering

Site Reliability Engineers have a responsibility to quantify how confident they are in the systems that they maintain. Chaos Engineering is an important discipline to validate reliability with controlled experiments to test various attributes of your system, from Monitoring all the way up to the Product.

Metrics

SRE's measure reliability in the following ways, and there are often SLOs for each.

Availability

How much uptime does your application have (measured in 9s)

There are 2 important KPIs of Availability.

  • SLA (defined and agreed to in a contact - e.g., 99.9%)
  • SLO (Internal objective, usually greater than the SLA - e.g., 99.99% )

Durability

How resilient is your system to data loss?

This can be measured in 9s as well. You have your systems and replicas under primaries, and then you have your backups. The more layers of backups, the more durable. Turtles all the way down!

Performance

How responsive is your application as measured by:
  • Traffic
  • Error Rate
  • Saturation
  • Latency
  • Packet Loss
  • ...to name several.

Capacity & Configuration

It's important to validate autoscaling rules.

In the cloud you may not need to buy new hardware to plan for a launch or big event, but you still need to make sure you're configured to scale when the time comes.

SRE vs DevOps: Can they coexist or do they compete?

Learn how DevOps and SREs can work together to create high performing, reliable sites.
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The role and responsibilities of SREs in software engineering

Site Reliability Engineering teams are made up of people from diverse backgrounds who work together toward the common goal of keeping systems and services reliably available.
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How to become a top notch SRE

Free resources and tools that will help you learn the skills you need to become an SRE.
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How much money do SREs make?

We polled the industry to give you a sense of salary ranges for SREs.
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SRE interview questions and job descriptions

As you're building your SRE team, here's some questions to find the best ones and some job descriptions you can use.
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Avoid downtime. Use Gremlin to turn failure into resilience.

Gremlin empowers you to proactively root out failure before it causes downtime. See how you can harness chaos to build resilient systems by requesting a demo of Gremlin.

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