If you have a kubernetes cluster running in a bare metal provider, along with a mongo database.  How do you handle Disaster Recovery?  Say the data center goes down.  What would be a good strategy to recover operations?
Great question. A good strategy is to set up a redundant Kubernetes cluster in a different data center. This way, if one data center goes down, the redundant cluster can take over operations and keep your applications running on a secondary cluster running in a different data center. Additionally, you should have a backup strategy for your MongoDB database. It involves replicating the data to a different data center or using a cloud-based backup solution such as MongoDB Atlas. That way you will ensure that you have a recent backup of your data that will restore operations quickly and efficiently in the event of a disaster. I will list what I have suggested to aid you in obtaining a better picture of strategies that you can consider, along with extra ideas:

1. Replication: Replicate your MongoDB database to another data center so that, in the event of a data center outage, you can switch to the replicated database. This requires a good deal of planning and configuration but can help minimize downtime in the event of a disaster.
2. Backup and Restore: Regularly backing up your MongoDB database and storing the backups in a secure location outside of the data center can help ensure that you can restore the database if needed. MongoDB Atlas may aid you in this case.
3. Kubernetes Cluster Replication: Another strategy is to replicate your entire Kubernetes cluster to another data center so that you can quickly switch to the replicated cluster in the event of a disaster. You can use tools like Velero to backup and restore your cluster.
4. Load Balancing: By using a load balancer to distribute traffic across multiple data centers, you can ensure that your applications remain available even if one data center goes down.
5. Monitoring and Alerting: Monitoring your infrastructure and setting up alerts can help you quickly detect and respond to issues before they become full-blown disasters.

Ultimately, the best disaster recovery strategy for your situation will depend on the specific needs you have and the resources you have available. A combination of the above strategies may be the optimal approach. Lastly, remember it's important to test and refine your disaster recovery plan to ensure that it will work as expected when and if you need it.