diff --git a/pr-analysis-3173.md b/pr-analysis-3173.md new file mode 100644 index 00000000000..2b2f609984f --- /dev/null +++ b/pr-analysis-3173.md @@ -0,0 +1,103 @@ +# PR #3173: Workflow Design Impact Analysis + +## Affected Workflows +- **Local Development Workflow (Workflow 1)**: Justification - The PR modifies `src/loadgenerator/requirements.txt`, which is consumed during the Docker build for the loadgenerator service as defined in `skaffold.yaml` (artifact with context `src/loadgenerator`). The workflow's design document ([.exp/design-workflow-1-local-development-workflow.md](.exp/design-workflow-1-local-development-workflow.md)) describes Skaffold building artifacts from `src/` directories, including loadgenerator via its config. This impacts the dependencies in the built image used for local load testing. +- **GKE Deployment Workflow (Workflow 2)**: Justification - Similar to Workflow 1, this workflow uses `skaffold run` to build and push images, including loadgenerator. The design document ([.exp/design-workflow-2-gke-deployment-workflow.md](.exp/design-workflow-2-gke-deployment-workflow.md)) notes configs for app and loadgenerator in the build loop. The dependency update affects the pushed image to Artifact Registry. + +## Additional Workflows Analysis + +### Helm Chart Deployment (Workflow 3) +#### Summary of design changes +The PR does not alter the Helm chart deployment process or templates (e.g., templates/loadgenerator.yaml). However, the loadgenerator service deployed via Helm will benefit from the updated urllib3 if its Docker image is rebuilt with the new requirements.txt and referenced in values.yaml (e.g., image tags). + +- **Affected aspects**: Runtime security and performance of loadgenerator in Helm releases. +- **How implemented**: External to workflow; build via docker/Skaffold, then helm upgrade with custom image. +- **Benefits/Implications**: Prevents vulnerabilities in load testing within Helm-managed environments like GKE or local clusters. No changes to Mermaid diagrams or doc needed. + +### Kustomize Customization and Deployment (Workflow 4) +#### Summary of design changes +Kustomize applies customized manifests including loadgenerator (base/loadgenerator.yaml and components like without-loadgenerator). The PR impacts the image used in these deployments. + +- **Affected aspects**: Enhanced loadgenerator functionality in customized clusters (e.g., with Istio, network policies). +- **Implementation**: Image update outside Kustomize; workflow unchanged. +- **Benefits**: Secures traffic simulation in customized setups. No diagram updates required. + +### Terraform Infrastructure Provisioning (Workflow 5) +#### Summary of design changes +Terraform creates GKE cluster and optional Memorystore; app deployment (with loadgenerator) follows via other tools. Updated deps improve load testing post-provisioning. + +- **Affected aspects**: Indirect; benefits infra-backed deployments. +- **Implications**: Aligns with base manifests in kustomize/ used after terraform apply. +- No changes to provisioning design or diagrams. + +For workflows 6 (Cloud Build) and 7 (Release), similar build impacts as 1/2, but without .exp docs, no detailed analysis here. Recommend reviewing their scripts (cloudbuild.yaml, docs/releasing/make-docker-images.sh) confirm loadgenerator build inclusion. + +[PR #3173](https://github.com/GoogleCloudPlatform/microservices-demo/pull/3173) + +## Local Development Workflow Analysis +### Summary of design changes +[Summary text as before] + +The initial deployment Mermaid diagram needs a minor update to reflect the enhanced build for loadgenerator. Below is the diff visualization (yellow notes indicate changes/additions from PR): + +```mermaid +sequenceDiagram + participant D as Developer + participant S as Skaffold + participant B as Docker Build + participant K as K8s Cluster + D->>S: skaffold dev + S->>S: Load skaffold.yaml (artifacts, manifests) + loop For each artifact + S->>B: docker build -t : src/ + B->>B: Build image from Dockerfile + alt loadgenerator artifact (PR impact) + Note over B: Change (yellow): urllib3 bumped to 2.6.0 in requirements.txt + Note over B: Addition (green): Security fixes (CVEs), perf improvements, Python 3.14 support + end + end + S->>K: kustomize build kubernetes-manifests/ | kubectl apply -f - + K->>K: Create Deployments, Services, Pods + Note over S,K: Pods pull local images and start + D->>K: kubectl port-forward deployment/frontend 8080:8080 + Note over D: Access app at http://localhost:8080 +``` + +The hot reload diagram is unaffected, as dep updates occur at initial build or via file change triggering rebuild of requirements-related files. + +### Updated Design Recommendation +No update to original .exp doc required, as change is implementation detail. However, if detailing build internals, add note about dependency management via requirements.txt files in service dirs. + +## GKE Deployment Workflow Analysis +### Summary of design changes +[Similar] + +The sequence diagram's build loop is similarly impacted. Diff visualization: + +```mermaid +sequenceDiagram + participant U as User/CLI + participant S as Skaffold + participant B as Builder (Docker/Buildkit) + participant R as Registry + participant K as Kustomize + participant C as GKE Cluster + U->>S: skaffold run --default-repo= + Note over S: Parse skaffold.yaml
Configs: app, loadgenerator + loop For each service artifact + S->>B: Build image from src//Dockerfile + B->>B: Use local Docker or GCB + B->>R: Push to registry + alt loadgenerator (PR change) + Note over B,R: Yellow: Updated deps in image pushed (urllib3 2.6.0) + Note over B,R: Green: Enhanced security & features in load testing component + end + end + S->>K: kustomize build + K->>C: kubectl apply + C->>C: Deploy +``` + +[Similar recommendation] + +[PR link] \ No newline at end of file