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Infrastructure overview

The stack is intentionally split across providers so each piece sits on its strongest free tier.

Topology

                    ┌──────────────────────┐
                    │      bytell.com      │
                    │   (Cloudflare DNS)   │
                    └──────────┬───────────┘
                               │
          ┌────────────────────┼────────────────────┐
          │                    │                    │
   ┌──────▼──────┐      ┌──────▼──────┐      ┌──────▼──────┐
   │   GitHub    │      │ Cloudflare  │      │   Tunnels   │
   │   Pages     │      │   Pages /   │      │  (private)  │
   │ (this site) │      │   Workers   │      │             │
   └─────────────┘      └─────────────┘      └──────┬──────┘
                                                     │
                                              ┌──────▼──────┐
                                              │  Local /    │
                                              │  OCI VMs    │
                                              └─────────────┘

   ┌──────────────┐    ┌──────────────┐    ┌──────────────┐
   │  OCI (PHX)   │◄──►│  GCP (IAD)   │    │  GitHub      │
   │              │    │              │    │              │
   │ • E2 micros  │    │ • Pub/Sub    │    │ • Source     │
   │ • Ampere     │    │ • BigQuery   │    │ • Actions    │
   │ • Vault      │    │ • Firestore  │    │ • Pages      │
   │ • OS / NoSQL │    │ • Firebase   │    │              │
   └──────────────┘    └──────────────┘    └──────────────┘

Free-tier role per provider

Compute

  • OCI Always Free: 2 × E2.1.Micro (1/8 OCPU, 1 GB) + 1 × A1.Flex Ampere ARM (4 OCPU, 24 GB total share)
  • GCP Always Free: 1 × e2-micro burstable (us-east1/central1/west1)
  • GitHub Codespaces: 120 core-hours/month (dev only, not deploy targets)

Storage

  • OCI Object Storage: 20 GB standard + 10 GB archive
  • GCS (GCP): 5 GB standard
  • Cloudflare R2: 10 GB with no egress fees — this is the killer free-tier storage primitive
  • GitHub Packages: standard limits

Data plane

  • GCP Pub/Sub: 10 GiB/mo for app message bus
  • GCP BigQuery: 10 GiB storage + 1 TiB query/mo for analytics
  • GCP Firestore: 1 GiB + 50k reads/day for realtime state
  • OCI NoSQL: 25 GB + 133M ops/mo per table (3 tables) — for bulk state

Edge / public face

  • Cloudflare DNS, TLS, DDoS, Tunnels: free for unlimited records
  • Cloudflare Workers: 100k req/day free
  • GitHub Pages: this site
  • Firebase Hosting: 10 GB / 360 MB/day

Egress

  • OCI: 10 TB/month — by far the most generous
  • Cloudflare R2: $0 egress (no cap)
  • GCP: 1 GB/mo to NA, then metered
  • This shape means bulk transfer originates from OCI or R2, not GCP.

Identity model

  • claude@bytell.com — dedicated cloud-ops Workspace identity used for OCI tenancy admin and GCP project ownership
  • terraform SA in GCP (terraform@bytell-claude-cloud.iam.gserviceaccount.com) — all terraform operations impersonate this SA via ADC; no exported keys (org policy iam.disableServiceAccountKeyCreation enforced)
  • tim@bytell.com — primary human Workspace identity
  • GitHub tbynum — admin of bytell-cloud org

Source of truth

All infrastructure-as-code lives in a private workspace; this docs site is the public-facing summary. Issues for cloud work are tracked locally in ProjectMgmt/ and referenced here when relevant.