Skip to main content
ubx’s sync block creates GitOps CRDs (ArgoCD Applications or Flux Kustomizations) with infrastructure outputs wired in as parameters.

​
The Problem

In a traditional GitOps setup: 
RDS provisioned → manually update values.yaml → commit → ArgoCD picks up
This is manual, slow, and error-prone.

​
The ubx Solution

unit "aws_rds_instance" "db" {
  engine         = "postgres"
  instance_class = "db.t3.micro"
}

sync "argocd" "backend" {
  repo      = "https://github.com/myorg/app-config"
  path      = "apps/backend"
  target    = "https://kubernetes.default.svc"
  namespace = "argocd"
  values = {
    db_host = ~unit.aws_rds_instance.db.endpoint  # auto-wired
    db_port = "5432"
  }
}
ubx apply provisions the RDS instance and creates the ArgoCD Application CRD with the endpoint injected as a Helm parameter. ArgoCD picks it up and deploys the app.

​
ArgoCD Setup

sync "argocd" "backend" {
  repo      = "https://github.com/myorg/app-config"
  path      = "apps/backend"
  target    = "https://kubernetes.default.svc"
  namespace = "argocd"
  values = {
    db_host      = ~unit.aws_rds_instance.db.endpoint
    cluster_name = ~unit.aws_eks_cluster.cluster.name
    env          = input.env
  }
}

​
Flux Setup

sync "flux" "infra" {
  repo      = "https://github.com/myorg/fleet-infra"
  path      = "./clusters/prod"
  namespace = "flux-system"
  values = {
    vpc_id  = ~unit.aws_vpc.main.id
    db_host = ~unit.aws_rds_instance.db.endpoint
  }
}

​
Multi-Stack GitOps

For large platforms, use remote blocks to consume outputs from infrastructure stacks: 
# apps stack
remote "infra" {
  source = "github.com/myorg/platform//stacks/infra"
  stack  = input.env
}

sync "argocd" "backend" {
  repo   = "https://github.com/myorg/app-config"
  path   = "apps/backend"
  target = "https://kubernetes.default.svc"
  namespace = "argocd"
  values = {
    db_host = ~@infra.db_endpoint
  }
}

​
Environment-Specific Sync

sync "argocd" "backend" {
  repo      = "https://github.com/myorg/app-config"
  path      = "apps/backend/${input.env}"  # env-specific path
  target    = "https://kubernetes.default.svc"
  namespace = "argocd"
  when      = input.env == "prod"  # only in prod
}