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Developer setup

Getting started

There are many ways you can setup you local environment, this is just a basic quick example of how to setup everything you'll need to get started running and developing Armada.

Pre-requisites

To follow this section it is assumed you have:

Running Armada locally

There are two options for developing Armada locally.

Kind

You can use a kind Kubernetes clusters.

  • The advantage of this is it is more like a real kubernetes cluster
  • However it is a bit more effort to set it up and it can only emulate a cluster with as much resource as your computer has

This is recommended if load doesn't matter or you are working on features that rely on integrating with kubernetes functionality

Fake-executor

You can use fake-executor

  • It is easy to setup, as it is just a Go program that emulates a kubernetes cluster
  • It allows you emulate clusters much larger than your current machine
  • As the jobs aren't really running, it won't properly emulate a real kubernetes cluster

This is recommended when working on features that are purely Armada specific or if you want to get a high load of jobs running through Armada components

Setup Kind development

  1. Get kind (Installation help here)

    GO111MODULE="on" go get sigs.k8s.io/kind@v0.11.1

  2. Create kind clusters (you can create any number of clusters)

    As this step is using Docker, it may require root to run

    kind create cluster --name demo-a --config ./example/kind-config.yaml
kind create cluster --name demo-b --config ./example/kind-config.yaml

  3. Start Redis

    docker run -d -p 6379:6379 redis

    The following steps are shown in a terminal, but for development is it recommended they are run in your IDE

  4. Start server in one terminal

    go run ./cmd/armada/main.go --config ./e2e/setup/insecure-armada-auth-config.yaml

  5. Start executor for demo-a in a new terminal

    ARMADA_APPLICATION_CLUSTERID=kind-demo-a ARMADA_METRIC_PORT=9001 go run ./cmd/executor/main.go

  6. Start executor for demo-b in a new terminal

    ARMADA_APPLICATION_CLUSTERID=kind-demo-b ARMADA_METRIC_PORT=9002 go run ./cmd/executor/main.go

Setup Fake-executor development

  1. Start Redis

    docker run -d -p 6379:6379 redis

    The following steps are shown in a terminal, but for development is it recommended they are run in your IDE

  2. Start server in one terminal

    go run ./cmd/armada/main.go --config ./e2e/setup/insecure-armada-auth-config.yaml

  3. Start executor for demo-a in a new terminal

    ARMADA_APPLICATION_CLUSTERID=demo-a ARMADA_METRIC_PORT=9001 go run ./cmd/fakeexecutor/main.go

  4. Start executor for demo-b in a new terminal

    ARMADA_APPLICATION_CLUSTERID=demo-b ARMADA_METRIC_PORT=9002 go run ./cmd/fakeexecutor/main.go

Optional components

NATS Streaming

Armada can be set up to use NATS Streaming as message queue for events. To run NATS Streaming for development you can use docker:

docker run -d -p 4223:4223 -p 8223:8223 nats-streaming -p 4223 -m 8223

For armada configuration check end to end test setup:

go run ./cmd/armada/main.go --config ./e2e/setup/insecure-armada-auth-config.yaml --config ./e2e/setup/nats/armada-config.yaml
Lookout - Armada UI

Lookout requires Armada to be configured with NATS Streaming. To run Lookout, firstly build frontend:

cd ./internal/lookout/ui
npm install
npm run openapi
npm run build

Start a Postgres database:

docker run -d -p 5432:5432 -e POSTGRES_PASSWORD=psw postgres

Migrate database:

go run ./cmd/lookout/main.go --migrateDatabase

Then run go application:

go run ./cmd/lookout/main.go

For UI development you can also use the React development server. Note that the Lookout API will still have to be running for this to work.

npm run start

Optionally, you can get a kind cluster and redis, NATS streaming and PostgreSQL containers up by running

./internal/lookout/ui/dev-setup.sh

you will still have to spin up armada, armada-lookout, and armada-executor. The script will print out which commands you can run to spin these up.

When you're done, you can run

./internal/lookout/ui/dev-teardown.sh

Testing your setup

  1. Create queue & Submit job
go run ./cmd/armadactl/main.go create queue test --priorityFactor 1
go run ./cmd/armadactl/main.go submit ./example/jobs.yaml
go run ./cmd/armadactl/main.go watch test job-set-1

For more details on submitting jobs to Armada, see here.

Once you submit jobs, you should be able to see pods appearing in your cluster(s), running what you submitted.

Note: Depending on your Docker setup you might need to load images for jobs you plan to run manually:

kind load docker-image busybox:latest

Running tests

For unit tests run

make tests

For end to end tests run:

make tests-e2e
# optionally stop kubernetes cluster which was started by test
make e2e-stop-cluster

Code Generation

This project uses code generation.

The armada api is defined using proto files which are used to generate Go source code (and the c# client) for our gRPC communication.

To generate source code from proto files:

make proto

Usage metrics

Some functionality the executor has is to report how much cpu/memory jobs are actually using.

This is turned on by changing the executor config file to include:

metric:
   exposeQueueUsageMetrics: true

The metrics are calculated by getting values from metrics-server.

When developing locally with Kind, you will also need to deploy metrics server to allow this to work.

The simplest way to do this it to apply this to your kind cluster:

kubectl apply -f https://gist.githubusercontent.com/hjacobs/69b6844ba8442fcbc2007da316499eb4/raw/5b8678ac5e11d6be45aa98ca40d17da70dcb974f/kind-metrics-server.yaml

Command-line tools

Our command-line tools used the cobra framework https://github.com/spf13/cobra.

You can use the cobra cli to add new commands, the below will describe how to add new commands for armadactl but it can be applied to any of our command line tools.

Steps

Get cobra cli tool:

go get -u github.com/spf13/cobra/cobra

Change to the directory of the command-line tool you are working on:

cd ./cmd/armadactl

Use cobra to add new command:

cobra add commandName

You should see a new file appear under ./cmd/armadactl/cmd with the name you specified in the command.