GitHub user lernerlinux-hash created a discussion: ACS wtih two Ceph clusters( Primary and DR ceph cluster with RDB mirroring/ Replciation). How to switch VMs to Dr Ceph when primary goes down?
Hi team, This is my first post. Please excuse me if I missed anything or asked some basic questions. We are running ACS version 4.20.0.0, with primary storage as Ceph (RBD) and secondary storage as traditional NFS. Currently, VMs are deploying and volumes are being created on Ceph. I have created a pool in Ceph and added the primary storage to ACS. My query is about setting up disaster recovery (DR). I want to keep a DR Ceph cluster in a different location and use snapshot-based RBD mirroring for replication. Right now, I am testing on a lab VM before applying this in production. Our setup is as follows: ACS on VM1 NFS as secondary storage Primary Ceph cluster on 3 VMs (where my VMs are deployed) DR Ceph cluster on 3 VMs (this cluster is up, and the RBD mirroring daemon is configured with one-way replication from Primary Ceph to DR Ceph) So far, I have been manually demoting the image on the primary cluster, promoting it on the DR cluster, and then stopping and starting the VM. However, the VM gets stuck at the GRUB bootloader and does not boot properly. I am not sure where I am going wrong and would appreciate help understanding this scenario. I believe this is a common production use case, so I might be missing some key steps. Please let me know if any more details are needed; I will be happy to provide them. Thank you. GitHub link: https://github.com/apache/cloudstack/discussions/11809 ---- This is an automatically sent email for [email protected]. To unsubscribe, please send an email to: [email protected]
