Observability-Driven Development: From Development to DevOps

This article provides a complete guide on observability-driven development (ODD), its benefits, its role in SDLC, and critical considerations for adoption.

November 28, 2022
4 mins read
Last Updated January 12, 2023
Observability Driven Development

Observability-Driven Development: From Development to DevOps

Observability is understanding the internal states of a system by examining logs, metrics, and traces. It’s about being able to dig and investigate the entire picture from a new angle.

While the value of observability is obvious, adding observability to your system sounds like a difficult task. The outcomes, though, are worthwhile!

PhonePe, for example, was able to achieve a 2000% growth of data infrastructure and a 65% reduction in data management costs with a data observability solution. Observability helped PhonePe tackle issues affecting performance and causing unnecessary downtime.

This is just one case. There are many companies where observability-driven development (ODD) is making a massive impact. In fact, organizations with ODD are 2.1 times more likely to detect issues and report 69% better MTTR.

Accelerate your development lifecycle and ensure fewer bugs with frequent delivery by partnering with us for reliable DevOps services. Our engineering team will help you bring digital transformation to your business. Collaborate with our expert team for a free consultation.

What is observability-driven development? (ODD)

Observability-driven development (ODD) is an approach to shift left observability to the earliest stage of the software development life cycle. It uses trace-based testing as a core part of the development process.

In ODD, developers write code while declaring desired output and specifications that you need to view the system’s internal state and process. It applies both at a component level and as a whole system. ODD is also a function to standardize instrumentation. It can be across programming languages, frameworks, SDKs, and APIs.

Moving from TDD to observability in production

TDD vs. ODD

Is it a big deal to move your software development methodology from TDD to ODD? Well, yes! But why is it so?

For the last couple of decades, Test Driven Development (TDD) has been the gold standard for testing software before it goes into production for release.

TDD can run the same tests multiple times with accuracy and ensure consistency. However, these tests are in isolation. They can’t reveal how the entire application would work or whether your customer experience will be great or poor. In short, TDD doesn’t let you know what’s happening to your application inside the production.

Moreover, running successful tests through TDD doesn’t guarantee that there won’t be any errors when the app goes into production. It doesn’t have the mechanism to identify and fix the code before the application gets live.

Lastly, TDD assumes a consistent production environment for conducting automated tests, which is not a real-time scenario. Experienced engineering teams would tell you that production environments are not consistent; it’s full of exciting deviations, and every test could create different anomalies. This means that TDD enables code traceability but doesn’t prepare for peculiarities you need to catch and test. It doesn’t allow you to know the real-time behavior and interaction of the app with its end users.

To overcome these issues, the phenomenon of observability comes onto the horizon. Observability is an evolved version of TDD that allows full-stack visibility into the infrastructure, application, and production area. It finds the root cause of issues affecting the user experience and product release through telemetry data such as logs, traces, and metrics. This continuous monitoring and tracking further help predict how end-users perceive the application.

Lastly, with Observability, you can write and ship better code even before it lands in source control—because it’s part of the set of tools, processes, and culture.

The role of observability in SDLC

Observability data primarily focuses on root cause analysis of the problem proactively. It covers unpredictable and predictable ways a service can fail, and alert the developers.

Observability in the Software Development Life Cycle (SDLC) provides continuous feedback about the availability and performance of your application. It helps detect the “unknown unknowns” to understand better production incidents that impact app performance and customer experience.

With Observability tools, you can get answers to questions like

  • From which component did an error originate?
  • Where is latency being introduced?
  • Which piece is taking up the most processing time?
  • How is a buggy component affecting the entire ecosystem?
  • At which level is the bug most prominent (code, platform, or architecture)?

As more teams are implementing DevOps and DevSecOps practices, the boundary between Observability and DevOps is blurring. It brings value to developers as they are involved in maintaining high availability, resilience, and app operability.

Observability in microservices

With various microservices distributed across different hosts, keeping track of dozens or even hundreds of microservices is challenging. There are potential points of failures and constant updates, which cannot be addressed by traditional monitoring. Observability in microservices exposes system states in production so developers can detect and solve performance issues. It provides visibility and real-user monitoring to optimize the app’s performance and availability.

By implementing DevOps and leveraging software intelligence platform, it is easy to curb large data volumes and latency and reliability related challenges for observability in microservices.

Here’s an example of Riot Games, a microservice architecture-based gaming platform. It adopted observability to detect and resolve critical issues affecting the gaming experience. The result is higher availability, better performance, and a more engaging fan experience.

Considerations for adopting ODD across various SDLC stages

ODD encourages a shift-left approach for observability right from the early phases of SDLC. This section will explore the high-level concerns you need to know for adopting ODD across various SDLC stages.

Considerations for Adopting ODD at Various Stages of SDLC

Design considerations

During the design phase, you must decide how the system will operate or which functionalities you want to perform. Based on this analysis, you can determine what points and processes to monitor and track continuously, which are critical data points to know system performance. For example, it could be MTTR (Mean Time to Repair), Average Response Time, Error Rate, Uptime, Downtime, Availability, etc.

Once you’ve identified the data points, you can know where to instrument. Observability in the design phase is about deciding where the instrumentation touchpoints would be so that you can accurately collect telemetry data from a container, service, application, host, etc, This will then help you know whether the system is working correctly or not.

Let us understand this with an example. Suppose you want to trace a particular event related to page load or average response time. You should design entry and exit points to get instrumentation data at a central location. Before diverging, entry or exit points should go through some standard code to handle specific functionalities. So, if you need to observe more components in the future, you can easily add them without refactoring the code.

Development considerations

Through the design phase, you’ve set up the instrumentation touchpoints through which you will get access to telemetry data. However, raw data without any context would be meaningless. So, during the development phase, provide context to the instrumentation data.

Build and deployment considerations

One of the practical implementation ways for observability during deployment is to follow the ‘Observability as Code’ practice. It’s a version that you can control and automate through deployment pipelines. In addition, it will ensure that observability gets implemented throughout the deployment environments.

Operation considerations

Operational observability allows you to conduct accurate debugging and proactive detection, improve production efficiency, and provide a holistic view of architecture.

So while implementing, the DevOps team should focus on proactive monitoring and a feedback loop from operations for continuous improvement. Prioritizing these actions would help you make your IT systems observable easily.

There are three ways to introduce operational observability into your organization:

  • First, you can ask the BI team to set up SQL-based monitoring systems. It will send alerts to email addresses, and developers can take appropriate action.
  • Second, you can develop a custom feature for monitoring and alerting that provides continuous data related to operations.
  • Third, you can opt for operational observability software that sets up everything to make IT systems observable.

Standards and tooling considerations

Tech giants like Google and Facebook have adopted observability practices and developed tools/standards that one can follow. For example, Google has released OpenCensus, an open-source library for metric collection and tracing.

OpenTrace is another popular tool focused on distributed tracing developed by CNCF (Cloud Native Computing Foundation). Recently, OpenCensus and OpenTrace have agreed to merge their functionalities. They built a new tool called OpenTelemetry that combines structured logging, metrics, and tracing under one roof.

So, consider appropriate standard and also select a backend of your choice to store and visualize the tracing data for analysis.

A final note

Observability and instrumentation should not only be considered at the end of a development cycle. Try to embed them during each stage of SDLC and continually check whether the application you’re building will serve well to the users.

Observability will allow you to deliver the products with a greater level of confidence, while reducing the bridge between development and operations.

So, if you’re planning to incorporate observability in your IT ecosystem, we at SIMFORM can help make your IT systems observable by leveraging DevOps principles. Connect with our industry experts and find out how your business can reach new levels of success with observability.

Hiren is VP of Technology at Simform with an extensive experience in helping enterprises and startups streamline their business performance through data-driven innovation.

Your email address will not be published.