docker-compose: How to pass secret to environment variable in logstash?

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I'm running elk stack on docker swarm, and I've a problem with env variables. Here is a variable "ELASTIC_PASSWORD_FILE" inside of a container. This variable is created by "ENV ELASTIC_PASSWORD_FILE elastic" in Dockerfile.

bash-4.2$ export
declare -x ELASTIC_CONTAINER="true"
declare -x ELASTIC_PASSWORD_FILE="/run/secrets/elastic_password.txt"

I'm trying to change it's value by environment variable in docker-compose file by doing something like below:

secrets: 
  - source: elasticsearch_password
    target: /run/secrets/elasticsearch_password.txt
    mode: 0600
    uid: "1000"
    gid: "1000"
environment:
  - LS_JAVA_OPTS=-Xmx256m -Xms256m
  - ELASTIC_PASSWORD_FILE=/run/secrets/elastic_password.txt

How to inject content of a file from /run/secrets/elastic_password.txt to the environment variable?

I'm running elk 7.7.0

elastic-stack logstash docker-compose environment-variables
1 Answers

Check this official documentation to use configs and read from your text file.

user_26380290
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