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stdlib

The source includes a standard library of item types that should always be present. Many of these item types exist in the global scope and serve to link together items in other scopes (e.g. ip addresses)

Config

All configuration options can be provided via the command line or as environment variables:

Environment Variable CLI Flag Automatic Description
CONFIG --config Config file location. Can be used instead of the CLI or environment variables if needed
LOG --log Set the log level. Valid values: panic, fatal, error, warn, info, debug, trace
NATS_NAME_PREFIX --nats-name-prefix A name label prefix. Sources should append a dot and their hostname .{hostname} to this, then set this is the NATS connection name which will be sent to the server on CONNECT to identify the client
MAX_PARALLEL --max-parallel Max number of requests to run in parallel

srcman config

When running in srcman, all of the above parameters marked with a checkbox are provided automatically, any additional parameters must be provided under the config key. These key-value pairs will become files in the /etc/srcman/config directory within the container.

apiVersion: srcman.example.com/v0
kind: Source
metadata:
  name: stdlib-source
spec:
  image: ghcr.io/overmindtech/stdlib-source:latest
  replicas: 2
  manager: manager-source

Health Check

The source hosts a health check on :8089/healthz which will return an error if NATS is not connected. An example Kubernetes readiness probe is:

readinessProbe:
  httpGet:
    path: /healthz
    port: 8080

Development

Running Locally

The source CLI can be interacted with locally by running:

go run main.go --help

To get automatic recompiles and reloading on code changes, use:

air

Testing

Tests in this package can be run using:

go test ./...

Packaging

Docker images can be created manually using docker build, but GitHub actions also exist that are able to create, tag and push images. Images will be build for the main branch, and also for any commits tagged with a version such as v1.2.0