CODEWITHSUNDEEP
scaladockerplayframeworkdocker-compose
Slavik Muz
Slavik Muz

Reputation: 1217

In docker compose file set environment as list

I have an application that on play that use aerospike

in application.conf i have a param that i can rewrite from environments

aerospike.hosts = ["192.168.33.10"]
aerospike.hosts = ${?DS_AEROSPIKE_HOSTS}

how i can set list of hosts in my docker compose file?

version: '3.1'

services:
     ds-aerospike-db:
        image: aerospike/aerospike-server
        restart: always
        volumes: 
          - volume:/opt/aerospike/etc
        command: ["--config-file","/opt/aerospike/etc/aerospike.conf"]
        ports:
          - 3000:3000
     dashboard:
        image: dashboard:0.1
        restart: always
        ports:
            - 9000:9000
        environment:
         DS_AEROSPIKE_HOSTS: '["192.168.33.10"]'

this format is an error DS_AEROSPIKE_HOSTS: '["192.168.33.10"]'

Upvotes: 5

Views: 13353

Answers (2)

Rich Dougherty
Rich Dougherty

Reputation: 3251

You have a couple of options:

  1. You can include a docker.conf file in your Docker build and inject the settings you want into that file. Then you can include the docker.conf file from your application.conf. E.g. add this to your application.conf:

    include "docker.conf"

  2. You can use an environment varible to pass a string value (as suggested by Stanislav) but then convert it to a sequence. The idiomatic way to do this is to make a ConfigLoader and then use it to convert a String to a Seq[String]. E.g. something like:

    implicit val stringSeqLoader: ConfigLoader[Seq[String]] =
  ConfigLoader(_.getString).map(_.split(','))

Upvotes: 0

Stanislav Mekhonoshin
Stanislav Mekhonoshin

Reputation: 4386

I believe you can't pass an array to the ENV variable. But you can pass it as a string, and then, later, parse string at your application.

environment:
  - DS_AEROSPIKE_HOSTS='192.168.33.10,192.168.33.11'

the valid docker-compose.yml syntax is stated at docs https://docs.docker.com/compose/environment-variables/

I'm not familiar with scala, but I believe you can do something like

aerospike.hosts = ${?DS_AEROSPIKE_HOSTS}.split(',')

Upvotes: 3

Related Questions