Question 1

How do I secure Docker Swarm Visualizer for a production swarm?

Accepted Answer

Follow the README's advice to protect the Docker daemon socket with SSL, as the app runs with /var/run/docker.sock access. Use TLS certificates and restrict network exposure, but note it's still a sample app not designed for secure production use.

Question 2

Docker Swarm Visualizer vs Portainer: which is better for monitoring?

Accepted Answer

Docker Swarm Visualizer is focused on real-time, graphical swarm visualization for learning, while Portainer offers a full GUI with management features, security, and support for multiple orchestrators. Choose Visualizer for demos and Portainer for operational monitoring.

Question 3

How to run Docker Swarm Visualizer on a Raspberry Pi swarm?

Accepted Answer

Use the pre-built ARM image 'alexellis2/visualizer-arm:latest' from the README, or build it locally on the Pi. Deploy as a service with constraints for manager nodes, similar to the standard setup but tailored for ARM architecture.

Question 4

Why does Docker Swarm Visualizer sometimes show missing node names?

Accepted Answer

This is due to occasional incomplete data from the Docker Remote API, as noted in the README. The visualization will update on the next pull, but it can cause temporary confusion during monitoring.

Question 5

Can Docker Swarm Visualizer handle more than 10 nodes effectively?

Accepted Answer

No, the TODO section mentions the CSS is optimized for only 3 nodes on a big screen, so the display may become unreadable or slow with larger clusters, limiting its utility for extensive deployments.

Question 6

How to build a custom Docker Swarm Visualizer image for a different architecture?

Accepted Answer

Use the docker build command on a device of the target architecture, as per the README. For example, on ARM, run 'docker build -t visualizer-arm:latest .' and replace the image name in deployment commands.

Question 7

Is Docker Swarm Visualizer compatible with Docker Compose files?

Accepted Answer

No, it's designed specifically for Docker Swarm Mode services and tasks, not for Compose-based deployments. You'd need to integrate it into a swarm stack or run it separately via docker service commands.

docker-swarm-visualizer

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