How do I configure Travis CI to use Docker in my .travis.yml?

How do I configure Travis CI to use Docker in my .travis.yml?

To configure Travis CI to use Docker, you need to specify the Docker image in your .travis.yml file. Here's a basic example:

language: generic
services:
  - docker

before_install:
  - docker pull your-image-name

script:
  - docker run your-image-name your-command

What if I need to build my own Docker image?

If you need to build your own Docker image, you can add a before_script section to your .travis.yml. Here's how:

before_script:
  - docker build -t your-image-name .

Can I use multiple Docker images in the same build?

Yes, you can use multiple Docker images. You can define multiple services in your .travis.yml file. For example:

services:
  - docker
  - your-second-image-name

How do I pass environment variables to my Docker container?

You can pass environment variables using the -e flag in your docker run command. For example:

script:
  - docker run -e MY_VAR=value your-image-name