The docker compose take long time to build, how to speed up

Question

The Minos Docker compose take long time to compile and fire up, the problem is more relevant if i have to purge the docker and reinstall from scratch. have a way to reduce that time?

this is the docker compose code:

 ...
  microservice-project:
    restart: always
    build:
      context: microservices/project
      target: production
    environment: &id001
      MINOS_BROKER_QUEUE_HOST: postgres
      MINOS_BROKER_HOST: kafka
      MINOS_REPOSITORY_HOST: postgres
      MINOS_SNAPSHOT_HOST: postgres
      MINOS_DISCOVERY_HOST: apigateway
    depends_on: &id002
    - postgres
    - kafka
    - apigateway
  microservice-product:
    restart: always
    build:
      context: microservices/product
      target: production
    environment: *id001
    depends_on: *id002
  microservice-user:
    restart: always
    build:
      context: microservices/user
      target: production
    environment: *id001
    depends_on: *id002
  microservice-github:
    restart: always
    build:
      context: microservices/github
      target: production
    environment: *id001
    depends_on: *id002
x-microservice-environment: *id001
x-microservice-depends-on: *id002

Answer 1

The docker compose take long time to compile because minos provide a docker-compose file with the build -> target parameter on "production".

as you can see on the microservice Dockerfile, minos provide two different stages, one is production that compile wheels files and a development that simply export the poetry requirements and build the project.

so, to improve the build performaces simply modify the docker-compose file like that

  ...
  microservice-project:
    restart: always
    build:
      context: microservices/project
      target: development
    environment: &id001
      MINOS_BROKER_QUEUE_HOST: postgres
      MINOS_BROKER_HOST: kafka
      MINOS_REPOSITORY_HOST: postgres
      MINOS_SNAPSHOT_HOST: postgres
      MINOS_DISCOVERY_HOST: apigateway
    depends_on: &id002
    - postgres
    - kafka
    - apigateway
  microservice-product:
    restart: always
    build:
      context: microservices/product
      target: development
    environment: *id001
    depends_on: *id002
  microservice-user:
    restart: always
    build:
      context: microservices/user
      target: development
    environment: *id001
    depends_on: *id002
  microservice-github:
    restart: always
    build:
      context: microservices/github
      target: development
    environment: *id001
    depends_on: *id002
x-microservice-environment: *id001
x-microservice-depends-on: *id002

Note that you may need to add a RUN poetry install statement in the development stage of your Dockerfile:

...
COPY ./pyproject.toml ./
RUN poetry install --no-root
COPY . .
RUN poetry install  # <-- Add this line
CMD ["poetry", "run", "microservice", "start"]

FROM development as build
...