fly-log-shipper

Ship logs from fly to other providers using NATS and Vector

In this repo you will find various Vector Sinks along with the required fly config. The end result is a Fly.IO application that automatically reads your organisation logs and sends them to external providers.

Quick start

1. Create a new fly logger app based on our docker image

fly launch --image ghcr.io/superfly/fly-log-shipper:latest

2. Set NATS source secrets for your new app
3. Set your desired provider from below

Thats it - no need to setup NATs clients within your apps, as fly apps are already sending monitoring information back to fly which we can read.

However for advanced uses you can still configure a NATs client in your apps to talk to this NATs server. See NATS

NATS source configuration

Secret	Description
ORG	Organisation slug (default to personal)
ACCESS_TOKEN	Fly personal access token (required; set with fly secrets set ACCESS_TOKEN=$(fly auth token))
SUBJECT	Subject to subscribe to. See [[NATS]] below (defaults to logs.>)
QUEUE	Arbitrary queue name if you want to run multiple log processes for HA and avoid duplicate messages being shipped

After generating your fly.toml, remember to update the internal port to match the vector internal port defined in vector-configs/vector.toml. Not doing so will result in health checks failing on deployment.

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

---

Set the secrets below associated with your desired log destination

Provider configuration

AppSignal

Secret	Description
APPSIGNAL_PUSH_API_KEY	AppSignal push API key

AWS S3

Secret	Description
AWS_ACCESS_KEY_ID	AWS Access key with access to the log bucket
AWS_SECRET_ACCESS_KEY	AWS secret access key
AWS_BUCKET	AWS S3 bucket to store logs in
AWS_REGION	Region for the bucket
S3_ENDPOINT	(optional) Endpoint URL for S3 compatible object stores such as Cloudflare R2 or Wasabi

Axiom

Secret	Description
AXIOM_TOKEN	Axiom token
AXIOM_DATASET	Axiom dataset

Better Stack Logs (formerly Logtail)

Secret	Description
BETTER_STACK_SOURCE_TOKEN	Better Stack Logs source token

Datadog

Secret	Description
DATADOG_API_KEY	API key for your Datadog account
DATADOG_SITE	(optional) The Datadog site. ie: datadoghq.eu

Highlight

Secret	Description
HIGHLIGHT_PROJECT_ID	Highlight Project ID

Honeycomb

Secret	Description
HONEYCOMB_API_KEY	Honeycomb API key
HONEYCOMB_DATASET	Honeycomb dataset

Humio

Secret	Description
HUMIO_TOKEN	Humio token
HUMIO_ENDPOINT	(optional) Endpoint URL to send logs to

HyperDX

Secret	Description
HYPERDX_API_KEY	HyperDX API key

Logdna

Secret	Description
LOGDNA_API_KEY	LogDNA API key

Logflare

Secret	Description
LOGFLARE_API_KEY	Logflare ingest API key
LOGFLARE_SOURCE_TOKEN	Logflare source token (uuid on your Logflare dashboard)

Loki

Secret	Description
LOKI_URL	Loki Endpoint
LOKI_USERNAME	Loki Username
LOKI_PASSWORD	Loki Password

New Relic

One of these is required for New Relic logs. New Relic recommend the license key be used (ref: https://docs.newrelic.com/docs/logs/enable-log-management-new-relic/enable-log-monitoring-new-relic/vector-output-sink-log-forwarding/)

Secret	Description
NEW_RELIC_INSERT_KEY	(optional) New Relic Insert key
NEW_RELIC_LICENSE_KEY	(optional) New Relic License key
NEW_RELIC_REGION	(optional) eu or us (default us)
NEW_RELIC_ACCOUNT_ID	New Relic Account Id

Papertrail

Secret	Description
PAPERTRAIL_ENDPOINT	Papertrail endpoint
PAPERTRAIL_ENCODING_CODEC	Papertrail codec (default is "json")

Sematext

Secret	Description
SEMATEXT_REGION	Sematext region
SEMATEXT_TOKEN	Sematext token

Uptrace

Secret	Description
UPTRACE_API_KEY	Uptrace API key
UPTRACE_PROJECT	Uptrace project ID
UPTRACE_SINK_INPUT	"log_json", etc.
UPTRACE_SINK_ENCODING	"json", etc.

For UPTRACE_SINK_ENCODING Vector expects one of avro, gelf, json, logfmt, native, native_json, raw_message, text for key sinks.uptrace.

EraSearch

Secret	Description
ERASEARCH_URL	EraSearch Endpoint
ERASEARCH_AUTH	EraSearch User
ERASEARCH_INDEX	EraSearch Index you want to use

HTTP

Secret	Description
HTTP_URL	HTTP/HTTPS Endpoint
HTTP_TOKEN	HTTP Bearer auth token

Slack ( experimental )

HTTP sink that can be used for sending log alerts to Slack.

Secret	Description
SLACK_WEBHOOK_URL	Slack WebHook URL
SLACK_ALERT_KEYWORDS	Keywords to alert on

Example for setting keywords fly secrets set SLACK_ALERT_KEYWORDS="[r'SIGTERM', r'reboot']"

---

NATS

The log stream is provided through the NATS protocol and is limited to subscriptions to logs in your organisations.

Connecting

Note: You do not have to manually connect a NAT Client, see Quick Start

If you want to add custom behaviours or modify the subject sent from your app, then you can connect your app to the NATs server manually.

Any fly app can connect to the NATs server on nats://[fdaa::3]:4223 (IPV6).

Note: you will need to supply a user / password.

User: is your Fly organisation slug, which you can obtain from fly orgs list > Password: is your fly token, which you can obtain from fly auth token

Example using the NATs client

Launch a nats client based on the nats-server image

fly launch --image="synadia/nats-server:nightly" --name="nats-client"

SSH into the new app

fly -a nats-client ssh console

nats context add nats --server [fdaa::3]:4223 --description "NATS Demo" --select \
  --user <YOUR FLY ORG SLUG> \
  --password <YOUR PAT>

nats pub "logs.test" "hello world"

Subject

The subject schema is logs.<app_name>.<region>.<instance_id> and the standard NATS wildcards can be used. In this app, the SUBJECT secret can be used to set the subject and limit the scope of the logs streamed.

Queue

If you would like to run multiple vm's for high availability, the NATS endpoint supports subscription queues to ensure messages are only sent to one subscriber of the named queue. The QUEUE secret can be set to configure a queue name for the client.

---

Vector

The nats source component sends logs to other downstream transforms and sinks in the Vector config. This processes the log lines and sends them to various providers. The config is generated from a shell wrapper script which uses conditionals on environment variables to decide which Vector sinks to configure in the final config.