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qontract

qontract (Queryable cONTRACT) is a collection of tools used to SREs to expose available managed services to application developer teams.

Overview

qontract overview

This repository comprises the server component, which is a GraphQL API server implemented in Typescript with the apollo-server-express package.

The JSON Schema Validation lives in a separate repo.

The Reconcile loop is implementation specific. Any tool that conforms with the following patterns is considered a qontract reconcile tool:

  • Retrieves desired state from the GraphQL API.
  • Can retrieve the current state by inspecting the service to that needs to be configured.
  • Is able to reconcile the service into the desired state from the discovered current state.
  • Is idempotent.
  • It can run with an option that only simulates what would happen, this called a plan or a dry-run.

An example of an implementation reconcile tools can be obtained from here: https://github.com/app-sre/qontract-reconcile.

Development Environment

Setting up yarn

Although it is not required, it's recommended that you use yarn for install dependencies and running development scripts.

To install this projects dependencies to a local node_modules directory:

yarn install

To run a process that watches for edits and rebuilds JavaScript from TypeScript:

yarn run watch

Or alternatively, you can run the TypeScript compilation once:

yarn build

Creating and validating the bundle

The data files bundle is required to start the server. Once you're in the qontract-server directory, run:

make bundle

Note that this requires Docker to be running on the host.

Optionally, if you want to specify the path for the app-interface repo on your local filesystem, you can use the parameter:

  • APP_INTERFACE_PATH - (optional) path to a local app-interface repo (Default: $PWD/../../service/app-interface).

Example: To generate the bundle with a specific app-interface path:

make bundle APP_INTERFACE_PATH=/home/myuser/app-interface/

Running the Qontract GraphQL server

To run an instance of the qontract GraphQL console:

LOAD_METHOD=fs DATAFILES_FILE=your_test_datafile yarn run server

Specific instructions for CentOS 7:

# Install node10
sudo yum install centos-release-scl-rh
sudo yum install rh-nodejs10

# Install yarn (as root)
scl enable rh-nodejs10 bash
npm install -g yarn

# Enable node10 (as user in qontract-server git repo)
scl enable rh-nodejs10 bash

# Install qontract-server yarn modules
yarn install

# Build the JavaScript
yarn build

# Start the server
make run

Style

All code should follow the airbnb style guide, which is enforced by this projects lint script:

yarn run lint