What is your CI/CD process, and how do you handle rollbacks and canary deployments?
CI/CD Pipeline Overview
Our CI/CD process is structured into distinct stages, each designed to maintain code integrity and facilitate seamless deployments:
Build Stage:
- Utilize Docker containers to create environment-agnostic builds.
- Compile assets, perform static code analysis, and generate artifacts.
Test Stage:
- Execute automated unit and integration tests using frameworks like PHPUnit and Jest.
- Implement security scans with tools to detect vulnerabilities.
Deploy Stage:
- Deploy to staging environments for user acceptance testing.
- Upon approval, promote builds to production using GitLab CI/CD pipelines.
Rollback Mechanisms
To ensure rapid recovery from potential issues, we have established comprehensive rollback strategies:
- Versioned Deployments:
Tag each release in Git, allowing easy reversion to previous stable states.
- Artifact Retention:
Store build artifacts in GitLab’s package registry, facilitating the redeployment of prior versions.
- Automated Rollbacks:
Integrate health checks post-deployment; if anomalies are detected, automated scripts trigger a rollback to the last known good configuration.
Canary Deployments
For critical applications, we employ canary deployment strategies to minimize risk:
- Incremental Rollouts:
Deploy new versions to a subset of users or servers, monitoring performance before full-scale release.
- Monitoring and Metrics:
Leverage Prometheus and Grafana to track key performance indicators (KPIs) during canary phases.
- Traffic Routing:
Utilize Kubernetes Ingress controllers or service meshes like Istio to manage traffic distribution between canary and stable versions.