Question 1

How to install and set up Contajners with Docker?

Accepted Answer

Add the Contajners dependency to your project.clj or deps.edn file, then follow the getting started guide in the documentation to initialize the client with Docker's socket or TCP connection. Ensure Docker is running and permissions are configured.

Question 2

Contajners vs clj-docker-client: which is better?

Accepted Answer

Contajners is positioned as an improvement over clj-docker-client, offering a more idiomatic Clojure API, better REPL integration, and multi-engine support. If you're building new Clojure projects or refactoring old ones, Contajners is generally recommended for its modern design.

Question 3

Can Contajners work with Kubernetes?

Accepted Answer

Contajners is focused on OCI-compliant container engines like Docker and Podman, not Kubernetes directly. You might need additional libraries or APIs to interact with Kubernetes, but Contajners can manage containers that are part of K8s clusters if the engine is supported.

Question 4

How to list running containers using Contajners?

Accepted Answer

Use the `containers/list` operation from the API, which returns a data structure of running containers. In Clojure code, you can call this function and process the result with standard Clojure data manipulation functions for filtering or display.

Question 5

Is Contajners suitable for production use?

Accepted Answer

While some teams use Contajners in production, its manual update cycle and community-driven nature mean you should assess stability based on your needs. It's best for teams comfortable with Clojure and willing to handle updates or contribute to the project.

Question 6

How does Contajners handle errors from the container engine?

Accepted Answer

Contajners follows Clojure idioms by using exceptions or data-driven error handling, depending on the operation. Check the API documentation for specific error responses, which are typically returned as Clojure maps that can be easily inspected and managed in code.

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