flyio-core-workflow-b
Execute Fly.io secondary workflow: Postgres clusters, persistent volumes, and private networking. Use when adding databases, persistent storage, or internal service communication. Trigger: "fly postgres", "fly volumes", "fly.io database", "fly.io persistent storage".
Best use case
flyio-core-workflow-b is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
Execute Fly.io secondary workflow: Postgres clusters, persistent volumes, and private networking. Use when adding databases, persistent storage, or internal service communication. Trigger: "fly postgres", "fly volumes", "fly.io database", "fly.io persistent storage".
Teams using flyio-core-workflow-b should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/flyio-core-workflow-b/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How flyio-core-workflow-b Compares
| Feature / Agent | flyio-core-workflow-b | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Execute Fly.io secondary workflow: Postgres clusters, persistent volumes, and private networking. Use when adding databases, persistent storage, or internal service communication. Trigger: "fly postgres", "fly volumes", "fly.io database", "fly.io persistent storage".
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
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SKILL.md Source
# Fly.io Core Workflow B: Postgres, Volumes & Networking
## Overview
Set up Fly Postgres, persistent Fly Volumes, and private networking between apps. Fly Postgres runs as a regular Fly app with automated replication. Volumes provide persistent NVMe storage attached to specific machines.
## Instructions
### Step 1: Create Fly Postgres
```bash
# Create a Postgres cluster
fly postgres create --name my-db --region iad --vm-size shared-cpu-1x --volume-size 10
# Attach to your app (sets DATABASE_URL secret automatically)
fly postgres attach my-db -a my-app
# Connect directly
fly postgres connect -a my-db
# psql> SELECT version();
# Proxy to local machine for dev tools
fly proxy 5432 -a my-db
# Now connect: psql postgres://postgres:password@localhost:5432
```
### Step 2: Create Persistent Volumes
```bash
# Create a volume (same region as your machine)
fly volumes create data --size 10 --region iad -a my-app
# List volumes
fly volumes list -a my-app
# Mount in fly.toml
```
```toml
# fly.toml
[mounts]
source = "data"
destination = "/data"
```
```bash
# Deploy to pick up mount
fly deploy
# Verify mount inside machine
fly ssh console -C "df -h /data"
```
### Step 3: Private Networking (6PN)
```bash
# Apps in the same org can reach each other via .internal DNS
# my-app can reach my-db at: my-db.internal:5432
# Internal DNS format: <app-name>.internal
# Machine-specific: <machine-id>.vm.<app-name>.internal
# Example: connect from app code
DATABASE_URL=postgres://postgres:password@my-db.internal:5432/my_db
```
```typescript
// Access internal services (no public internet)
const dbUrl = `postgres://postgres:${process.env.DB_PASSWORD}@my-db.internal:5432/mydb`;
const apiUrl = `http://my-api.internal:3000/health`; // Internal HTTP
```
### Step 4: Postgres Backups and Failover
```bash
# List backups
fly postgres barman list-backups -a my-db
# Create manual backup
fly postgres barman backup -a my-db
# Check replication status
fly postgres barman check -a my-db
# Failover to standby (if primary fails)
fly postgres failover -a my-db
```
## Error Handling
| Error | Cause | Solution |
|-------|-------|----------|
| `volume not found` | Volume in different region | Create volume in same region as machine |
| `connection refused on .internal` | App not running | Check `fly status -a target-app` |
| `database does not exist` | Not yet created | Run `CREATE DATABASE mydb;` via `fly postgres connect` |
| `disk full` | Volume full | Extend: `fly volumes extend vol_xxx --size 20` |
## Resources
- [Fly Postgres](https://fly.io/docs/postgres/)
- [Fly Volumes](https://fly.io/docs/volumes/)
- [Private Networking](https://fly.io/docs/networking/private-networking/)
## Next Steps
For common errors, see `flyio-common-errors`.Related Skills
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