Fly.io

Overview

Forward logs from your Fly.io apps to Squasher using Fly’s built-in log shipping. Squasher detects errors and groups them with AI triage. If you use the Log Connectors screen in Squasher, create the Fly.io connector first and copy the managed endpoint and ingest key from there. The manual setup below still maps to the same Squasher ingest path.

Option 1: NATS Log Shipping (Recommended)

Use Fly’s official log shipper to forward logs to Squasher.

Launch the log shipper

fly launch --no-deploy --image flyio/log-shipper:latest

Configure fly.toml

Replace the [http_service] section:

[[services]]
http_checks = []
internal_port = 8686

Set secrets

ORG_SLUG=personal # or your org slug from `fly orgs list`
fly secrets set ORG=$ORG_SLUG
fly secrets set ACCESS_TOKEN=$(fly tokens create readonly $ORG_SLUG | cut -d' ' -f2)
fly secrets set HTTP_URL=https://ingest.squasher.ai/v1/drain/flyio/YOUR_PROJECT_ID
fly secrets set HTTP_TOKEN=sq_pk_your_api_key

Deploy

fly deploy

Option 2: Direct OTel Export

If your Fly app uses OpenTelemetry, point the exporter directly at Squasher:

fly secrets set OTEL_EXPORTER_OTLP_ENDPOINT=https://ingest.squasher.ai
fly secrets set OTEL_EXPORTER_OTLP_HEADERS="x-squasher-key=sq_pk_your_api_key"
fly secrets set OTEL_SERVICE_NAME=my-fly-app

See language-specific setup in our OpenTelemetry guide.

What Gets Captured

Squasher detects errors using:

Severity field: error, fatal, critical
Message heuristics: lines containing Error, Exception, panic, fatal
Application crash indicators from Fly’s platform logs

All non-error entries are stored for AI triage context.

Agent handoff

Set up Fly.io logs for Squasher project <project_id>. Prefer the managed connector endpoint, use read-only Fly tokens where possible, verify one error-level event, and ask before changing production log shipping or secrets.

Get Started

SDKs

Integrations

Migrations

Cloud Log Drains

Features

API Reference

Overview

Option 1: NATS Log Shipping (Recommended)

Option 2: Direct OTel Export

What Gets Captured

Agent handoff

​Overview

​Option 1: NATS Log Shipping (Recommended)

​Option 2: Direct OTel Export

​What Gets Captured

​Agent handoff

Overview

Option 1: NATS Log Shipping (Recommended)

Option 2: Direct OTel Export

What Gets Captured

Agent handoff