GitOps Adoption and Argo CD Platform Rollout
Migrated a multi-team engineering organization from ad hoc kubectl and script-based deployments to a structured GitOps model using Argo CD, with clear repository structure, promotion workflows, and application ownership maintained across environments.
Technical Implementation
- Designed the GitOps repository structure around a separation of application source, Helm chart definitions, and environment-specific Argo CD ApplicationSet manifests so each team owned their delivery configuration in Git without sharing a single monolithic deployment repository.
- Deployed Argo CD with OIDC-based access, project scoping, and RBAC aligned to team boundaries so application teams had self-service visibility into their own application sync status without being able to modify cluster-level or other team configurations.
- Built ApplicationSet generators for environment promotion patterns so a merge to the relevant branch triggered a sync to the target environment, replacing the previous mixture of manual kubectl apply runs, CI scripts, and partially documented release processes.
- Validated the rollout by migrating pilot applications first, checking diff behaviour, sync health, rollback procedures, and secret handling through External Secrets Operator before migrating the remaining application portfolio and deprecating the previous deployment approach.
Client Delivery & Handover
The rollout was done with platform engineers and application team leads through paired implementation sessions, application-by-application migration reviews, and enablement workshops. Repository structure and ownership model decisions were made with input from team leads before migration started so the Argo CD configuration reflected how teams actually worked rather than an idealized model. Handover included GitOps architecture documentation, ApplicationSet templates, promotion workflow guidance, Argo CD operating runbooks, and training for application teams on day-to-day usage and incident handling.
Outcome
Deployments became auditable, reversible, and consistent across environments, with teams spending less time coordinating releases and support engineers having a clear starting point for investigating deployment-related incidents.
Project Snapshot
Category
Platform Engineering
Sector
Enterprise
Duration
12 weeks
Next Step
If this project is close to the work your team is planning, Ideamics can discuss comparable architectural decisions, delivery sequencing, and implementation tradeoffs in more detail.