Developer guide

Developer guide

This document is intended for developers who want to contribute to the project. It contains information about the project structure, how to build the project and how to run the tests.

Quickstart

Want to quickly get Armada running and test it? Install the prerequisites and then run:

mage localdev minimal testsuite

To get the UI running, run:

mage ui

Dealing with Arm and Windows problems

There is limited information on problems that appear on Arm/Windows Machines when running this setup.

If you encounter any problems, you can create a ticket and link it to the relevant issue, for example:

Armada design docs

For more information about Armada’s design, see the following pages:

Other developer docs

Pre-requisites

Before you can start using Armada, you first need to install the following items:

Using mage

mage is a build tool that we use to build Armada. It is similar to Make, but written in Go. It is used to build Armada, run tests and run other useful commands. To see a list of available commands, run mage -l.

Setting up LocalDev

LocalDevprovides a reliable and extendable way to install Armada as a developer. It runs the following steps:

Note: If you edit a proto file, you also need to run mage proto to regenerate the Go code.

It has the following options to customise further steps:

We use mage localdev minimal to test the CI pipeline. You should therefore use it to test changes to the core components of Armada.

Debugging error: port 6443 is already in use after running mage localdev full

Identifying the conflict

Before making any changes, identify which port is causing the conflict. Port 6443 is a common source of conflicts. You can check for existing bindings to this port using commands like netstat or lsof.

  1. The kind.yaml file is where you define the configuration for your Kind clusters. To resolve port conflicts, open your kind.yaml file.

  2. Locate the relevant section where the hostPort is set. It may look something like this:

    - containerPort: 6443 # control plane
  hostPort: 6443  # exposes control plane on localhost:6443
  protocol: TCP
    • Modify the hostPort value to a port that is not in use on your system. For example:
    - containerPort: 6443 # control plane
  hostPort: 6444  # exposes control plane on localhost:6444
  protocol: TCP

    You are not limited to using port 6444. You can choose any available port that doesn’t conflict with other services on your system. Select a port that suits your system configuration.

Testing if LocalDev is working

Running mage testsuite runs the full test suite against the LocalDev cluster. You should therefore use this to test changes to the core components of Armada.

You can also run the same commands yourself:

go run cmd/armadactl/main.go create queue e2e-test-queue

# To enable Ingress tests to pass
export ARMADA_EXECUTOR_INGRESS_URL="http://localhost"
export ARMADA_EXECUTOR_INGRESS_PORT=5001

go run cmd/testsuite/main.go test --tests "testsuite/testcases/basic/*" --junit junit.xml

Running the UI

In LocalDev, the UI is built seperately with mage ui. To access it, open http://localhost:8089 in your browser.

For more information, see the UI Developer Guide.

Choosing components to run

You can set the ARMADA_COMPONENTS environment variable to choose which components to run. It is a comma-separated list of components to run. For example, to run only the server and executor, run:

export ARMADA_COMPONENTS="server,executor"

Running Pulsar-backed scheduler with LocalDev

Ensure your local environment is completely torn down with:

mage LocalDevStop

And then run:

mage LocalDev minimal

Ensure your LocalDev environment is completely torn down when switching between Pulsar-backed and legacy setups.

If the eventsingester or the scheduleringester don’t come up then just manually spin them up with docker-compose up.

Debugging

The mage target mage debug supports multiple methods for debugging, and runs the appropriate parts of LocalDev as required.

It supports the following commands:

Note We are actively accepting contributions for more debugging guides.

VS Code debugging

After running mage debug vscode, you can attach to the running processes using VS Code. See the launch.json file.

To use VS Code debugging, see the VSCode Debugging Guide.

Delve Debugging

The Delve target creates a new docker-compose file: ./docker-compose.dev.yaml with the correct volumes, commands and images for debugging.

To manually create the compose file and run it yourself, run the following commands:

mage createDelveCompose

# You can then start components manually
docker compose -f docker-compose.dev.yaml up -d server executor

After running mage debug delve, you can attach to the running processes using Delve.

$ docker compose exec -it server bash
root@3b5e4089edbb:/app# dlv connect :4000
Type 'help' for list of commands.
(dlv) b (*SubmitServer).CreateQueue
Breakpoint 3 set at 0x1fb3800 for github.com/armadaproject/armada/internal/armada/server.(*SubmitServer).CreateQueue() ./internal/armada/server/submit.go:137
(dlv) c
> github.com/armadaproject/armada/internal/armada/server.(*SubmitServer).CreateQueue() ./internal/armada/server/submit.go:140 (PC: 0x1fb38a0)
   135: }
   136:
=> 137: func (server *SubmitServer) CreateQueue(ctx context.Context, request *api.Queue) (*types.Empty, error) {
   138:         err := checkPermission(server.permissions, ctx, permissions.CreateQueue)
   139:         var ep *ErrUnauthorized
   140:         if errors.As(err, &ep) {
   141:                 return nil, status.Errorf(codes.PermissionDenied, "[CreateQueue] error creating queue %s: %s", request.Name, ep)
   142:         } else if err != nil {
   143:                 return nil, status.Errorf(codes.Unavailable, "[CreateQueue] error checking permissions: %s", err)
   144:         }
   145:
(dlv)

You can find all outputs of delve in the ./delve directory.

External debug port mappings

Armada service Debug host
server localhost:4000
executor localhost:4001
binoculars localhost:4002
eventingester localhost:4003
lookoutui localhost:4004
lookout localhost:4005
lookoutingester localhost:4007

GoLand run configurations

We provide a number of run configurations within the .run directory of this project. These will be accessible when opening the project in GoLand, enabling you to run Armada in both standard and debug mode.

The following high-level configurations are provided, each composed of sub-configurations:

A minimal local Armada setup using these configurations would be Armada Infrastructure Services and one of (Armada (Legacy Scheduler) or Armada (Pulsar Scheduler)). Running the Lookout UI script on top of this configuration enabsle you to develop the Lookout UI live from GoLand, and see the changes visible in your browser.

Note: These configurations (executor specifically) require a kubernetes config in $PROJECT_DIR$/.kube/internal/config.

GoLand does not allow us to specify an ordering for services within docker compose configurations. As a result, some database migration services may require rerunning.

VS Code debug configurations

We similarly provide run and debug configurations for VS Code users to run each Armada service and use the debugger (provided with VS Code).

The Armada configuration performs all required setup (setting up the Kind cluster, spinning up infrastructure services, performing database migrations) and then runs all services.

Other debugging methods

Run mage debug local to only spin up the dependencies of Armada, and then run the individual components yourself.

For required enviromental variables, see the Enviromental Variables guide.

Finer-grain control

To run the individual mage targets yourself, see the Manually running LocalDev guide.