In this blog post, you will discover how to use the new feature in AWS CodeDeploy to deploy applications one Availability Zone (AZ) at a time, enhancing operational resilience through improved fault isolation. Making changes to a system can pose risks, and even advanced CI/CD systems with thorough testing may lead to bad changes in production. To reduce this risk, fractional deployments are employed along with monitoring crucial metrics like availability and latency.
By implementing CodeDeploy zonal deployments, you can align with an Availability Zone independent (AZI) architecture strategy, ensuring that infrastructure or deployment failures are handled uniformly. An AZI architecture follows fault isolation principles using AZs as boundaries to contain the impact of impairments. By using zonal shifts, traffic can be redirected away from a troubled AZ to quickly mitigate impact.
Traditional deployment strategies face challenges when identifying the source of an event, such as infrastructure issues or failed deployments. Rollbacks can take significant time, especially in complex deployments spanning multiple AZs. Using zonal deployments in AWS CodeDeploy allows for efficient mitigation by phasing deployments one AZ at a time, creating well-defined fault containers for easier impact containment.
Custom configurations in CodeDeploy enable zonal deployments that deploy updates to batches of instances in each AZ sequentially, preventing deployment of an entire Region at once. By monitoring duration and defining unique properties for initial AZ deployments, potential failures can be identified and mitigated quickly. Zonal shifts are particularly useful in recovering from failed deployments, as they swiftly shift traffic away from the affected AZ, reducing customer impact.
Performing zonal deployments can significantly enhance the effectiveness of AZI architectures by aligning deployments with fault isolation boundaries. Predictable scopes of impact and shared observability tools for infrastructure events and deployments streamline recovery efforts and reduce complexity. Zonal deployments in AWS CodeDeploy provide a structured approach to deployment, ensuring efficient mitigation of issues that may arise during the deployment process.
Michael Haken, a Senior Principal Solutions Architect with extensive experience in supporting various customer sectors, highlights the importance of zonal deployments for improving operational resilience and accelerating recovery from potential deployment failures. If you want to learn more about zonal deployments in AWS CodeDeploy, check out the link provided in the blog.
Article Source
https://aws.amazon.com/blogs/devops/fault-isolated-zonal-deployments-with-aws-codedeploy/