[carrollgt91]

I can't speak for Kubernetes, as I haven't tried it, but we've just started the migration to using Mess/Marathon for infrastructure management.

Following this course will give you a solid foundation for debugging issues, and as has been mentioned, the logs are surprisingly useful for that task. Once we got the packages installed on the cluster, we tested various ways we could imagine it failing (application failing, docker container failing, image restarting, image dying, etc.) and found it pretty intuitive to fix most issues. Sometimes, the fix is necessarily outside of dcos - you'll need to set up an autoscaling group to ensure you always have the proper number of nodes running. You'll need to set up VPCs to ensure your public/private slaves are actually public and private. You'll need to tag those instances as they're launching so Marathon will know they're public/private respectively.

Assuming your team is pretty ops-savvy, I'd say dcos is surprisingly simple to manage and debug, and this advanced course does a great job of walking you through the entire stack of technologies used.