# seemueller-io/cluster

### k8s _"as simple as possible, but no simpler."_

```shell
<npm|yarn|pnpm|bun> run clean
<npm|yarn|pnpm|bun> run setup
<npm|yarn|pnpm|bun> run dev
```

## Directory Structure
```markdown
deploy/
├── [env]: Environment Deployment
│ ├── cluster - Manages deployment of a cluster
│ ├── components - Manages deployments of services on the cluster (ZITADEL, CertManager, ect...)
│ └── configurations - Manages provider specific configurations
packages/
└── Scripts, Example Apps, and a development proxy
```


## Architecture

```mermaid
flowchart LR

%% ===== Local Machine =====
subgraph L[Local Machine]
direction TB
  user[Developer Browser]
  proxy[localhost-proxy HTTP]
  host[Port Mapping Layer]
  registry[Local Docker Registry]

  user -->|HTTP 3000| proxy
  proxy -->|HTTPS 443| host
end

%% ===== Kind Cluster =====
subgraph K[Kind Cluster]
direction TB
  ingress[Ingress Controller]
  exampleApp[Example Web App]
  apps[Backend Services]
  zitadel[ZITADEL IAM]
  pg[(PostgreSQL Identity Store)]
  cert[Cert-Manager]

  %% Routing
  ingress --> exampleApp
  ingress --> apps

  %% OIDC
  exampleApp -->|OIDC: /authorize, /callback| zitadel
  apps -->|Validate OIDC tokens| zitadel
  zitadel --> pg

  %% TLS automation (dotted)
  cert -.-> ingress
  cert -.-> exampleApp
  cert -.-> apps
  cert -.-> zitadel
end

%% ===== Local ⇄ Cluster =====
host -->|80 -> 30080, 443 -> 30443| ingress

%% ===== Images into the cluster =====
registry -->|image pulls| exampleApp
registry -->|image pulls| apps

%% ===== CDKTF Stacks =====
subgraph T[CDKTF Stacks]
direction TB
  clusterStack[cluster]
  componentsStack[components]
  configurationsStack[configurations]
end

clusterStack --> ingress
componentsStack --> ingress
componentsStack --> cert
componentsStack --> zitadel
configurationsStack --> exampleApp
configurationsStack --> apps

```

The localhost-proxy accepts HTTP on port 3000 and forwards HTTPS to localhost:443; the Kind cluster maps host ports 80 -> 30080 and 443 -> 30443 to the ingress controller inside the cluster. Traffic is routed through ingress to services secured by ZITADEL and PostgreSQL, with Cert-Manager handling TLS. CDKTF provisions the cluster, core components, and app configs, using a local Docker registry for images.

## Developer Notes
For platforms other than Darwin, you'll need to trust root certificates manually.