Utilizing the docker-compose JSON logging driver with custom environment labels

Question

Utilizing the docker-compose JSON logging driver with custom environment labels

My goal is to retrieve logs in the following format:

{"log":"Using CATALINA_BASE:   /opt/apache-tomcat-7.0.76\r\n","stream":"stdout","time":"2017-04-19T04:28:33.608418994Z","attrs":{"production_status":"testing","os":"ubuntu"}}

I have set up my docker-compose.yml as shown below:

version: '2.1'
services:
  web:
    image: hello-world/web:latest
    container_name: api
    ports:
      - "80:8080"
logging:
  driver: "json-file"
  options:
    max-size: 10m
    max-file: "3"
    labels: testing
    env: ubuntu

However, I am unable to see the "attrs" key in the logs. Can someone please advise on what I might be doing wrong?

json logging docker-compose attr

Answer 1

Answer №1

During my experimentation, I discovered that there are two components required to display the labels/environment variables in the logs.

Specify which labels/environment variables should be shown in the logs
Assign those labels/environment variables to the container

To achieve your desired outcome, you must update the docker-compose.yml file with the following configuration:

version: '2.1'
services:
  web:
    image: hello-world/web:latest
    container_name: api
    ports:
      - "80:8080"
    logging:
      driver: "json-file"
      options:
        max-size: 10m
        max-file: "3"
        labels: "production_status"
        env: "os"
    labels:
      production_status: "testing"
    environment:
      - os=ubuntu

Answer 2

During my experimentation, I discovered that there are two components required to display the labels/environment variables in the logs.

Specify which labels/environment variables should be shown in the logs
Assign those labels/environment variables to the container

To achieve your desired outcome, you must update the docker-compose.yml file with the following configuration:

version: '2.1'
services:
  web:
    image: hello-world/web:latest
    container_name: api
    ports:
      - "80:8080"
    logging:
      driver: "json-file"
      options:
        max-size: 10m
        max-file: "3"
        labels: "production_status"
        env: "os"
    labels:
      production_status: "testing"
    environment:
      - os=ubuntu

Utilizing the docker-compose JSON logging driver with custom environment labels

Answer №1

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