Configuring Kuzzle #

The Kuzzle configuration is stored in a kuzzlerc file found in the root folder of your Kuzzle installation.

Kuzzle uses rc to override its default configuration by either:

• loading parameters from a .kuzzlerc file (sample file) ;
• loading parameters from environment variables with a kuzzle_ prefix.

Example 1: configuring Kuzzle using a custom .kuzzlerc file #

You can write your custom config parameters in a .kuzzlerc and store it in $HOME/.kuzzlerc or one of these locations:

{
  "services": {
    "db": {
      "client": {
        "host": "http://localhost:9200",
        "apiVersion": "5.4"
      }
    }
  }
}

Example 2: configuring Kuzzle using Environment Variables #

The name of the environment variable must match the path of the configuration parameter in the .kuzzlerc file. To set the name of the environment variable:

• Use the prefix kuzzle_,
• then append the parameter path (as defined in the .kuzzlerc file) by using a double underscore __ to separate each level of its hierarchy.

For example, the .kuzzlerc parameter services.db.host in example 1, is represented by the environment variable kuzzle_services__db__host:

export kuzzle_services__db__host="<DB_HOST>"

Environment variables are particularly handy when running Kuzzle in a Docker container. Using Docker Compose, they can easily be configured in the environment section of the docker-compose.yml file. For example, here's how we pass environment variables to Kuzzle in our default docker-compose file:

version: '3'

services:
  kuzzle:
    image: kuzzleio/kuzzle
    cap_add:
      - SYS_PTRACE
    depends_on:
      - redis
      - elasticsearch
    environment:
      - kuzzle_services__db__client__host=http://elasticsearch:9200
      - kuzzle_services__internalCache__node__host=redis
      - kuzzle_services__memoryStorage__node__host=redis
      - NODE_ENV=production

  redis:
    image: redis:5

  elasticsearch:
    image: kuzzleio/elasticsearch:5.6.10
    ulimits:
      nofile: 65536
    environment:
      - cluster.name=kuzzle
      - "ES_JAVA_OPTS=-Xms1024m -Xmx1024m"