Tag ha

Step 1: Prepare Proxmox Nodes

1. Update and Upgrade Proxmox VE on all nodes:

apt update && apt full-upgrade -y

2. Ensure that all nodes have the same version of Proxmox VE:

pveversion

Step 2: Set Up the Proxmox Cluster

1. Create a new cluster on the first node:
   • pvecm create my-cluster
2. Add the other nodes to the cluster:
   • pvecm add <IP_of_first_node>
3. Verify the cluster status:
   • pvecm status

Step 3: Install Ceph on Proxmox Nodes

1. Install Ceph packages on all nodes:

install ceph ceph-mgr -y

Step 4: Create the Ceph Cluster

1. Initialize the Ceph cluster on the first node:
   • pveceph init --network <cluster_network>
2. Create the manager daemon on the first node:
   • pveceph createmgr

Step 5: Add OSDs (Object Storage Daemons)

1. Prepare disks on each node for Ceph OSDs:
   • pveceph createosd /dev/sdX
2. Repeat the process for each node and disk.

Step 6: Create Ceph Pools

1. Create a Ceph pool for VM storage:
   • pveceph pool create mypool 128

Step 7: Configure Proxmox to Use Ceph Storage

1. Add the Ceph storage to Proxmox:
   • Navigate to Datacenter > Storage > Add > RBD.
   • Enter the required details like ID, Pool, and Monitor hosts.
   • Save the configuration.

Step 8: Enable HA (High Availability)

1. Configure HA on Proxmox:
   • Navigate to Datacenter > HA.
   • Add resources (VMs or containers) to the HA manager.
   • Configure the HA policy and set desired node priorities.

Step 9: Testing High Availability

1. Simulate node failure: Power off one of the nodes and observe how the VMs or containers are automatically migrated to other nodes.

Step 10: Monitoring and Maintenance

1. Use the Proxmox and Ceph dashboards to monitor the health of your cluster.
2. Regularly update all nodes to ensure stability and security.

Optional: Additional Ceph Configuration

1. Add Ceph Monitors for redundancy:bashKodu kopyalapveceph createmon
2. Add more Ceph MDS (Metadata Servers) if using CephFS:bashKodu kopyalapveceph createmds
3. Tune Ceph settings for performance and reliability based on your specific needs.

By following these steps, you will have a robust Proxmox VE and Ceph high availability setup, ensuring that your VMs and containers remain highly available even in the event of hardware failures.

1. Cluster Configuration:
   • Nodes: A Proxmox cluster consists of multiple nodes, which are physical servers running Proxmox VE.
   • Networking: Nodes in a Proxmox cluster should be connected to a common network. A private network for internal communication and a public network for client access are typically configured.
   • Shared Storage: Shared storage is crucial for a Proxmox cluster to enable features like live migration and high availability. This can be achieved through technologies like NFS, iSCSI, or Ceph.
2. High Availability (HA):
   • Proxmox VE includes a feature called HA, which ensures that critical VMs are automatically restarted on another node in the event of a node failure.
   • HA relies on fencing mechanisms to isolate a failed node from the cluster and prevent split-brain scenarios. This can be achieved through power fencing (e.g., IPMI, iLO, iDRAC) or network fencing (e.g., switch port blocking).
   • When a node fails, the HA manager on the remaining nodes detects the failure and initiates the restart of the affected VMs on healthy nodes.
3. Corosync and Pacemaker:
   • Proxmox VE uses Corosync as the messaging layer and Pacemaker as the cluster resource manager. These components ensure that cluster nodes can communicate effectively and coordinate resource management.
   • Corosync provides a reliable communication channel between nodes, while Pacemaker manages the resources (VMs, containers, services) in the cluster and ensures they are highly available.
4. Resource Management:
   • Proxmox clusters allow for dynamic resource allocation, allowing VMs and containers to use resources based on demand.
   • Memory and CPU resources can be allocated and adjusted for each VM or container, and live migration allows these resources to be moved between nodes without downtime.
5. Backup and Restore:
   • Proxmox includes backup and restore functionality, allowing administrators to create scheduled backups of VMs and containers.
   • Backups can be stored locally or on remote storage, providing flexibility in backup storage options.
6. Monitoring and Logging:
   • Proxmox provides monitoring and logging capabilities to help administrators track the performance and health of the cluster.
   • The web interface includes dashboards and graphs for monitoring resource usage, as well as logs for tracking cluster events.
7. Updates and Maintenance:
   • Proxmox clusters can be updated and maintained using the web interface or command-line tools. Updates can be applied to individual nodes or the entire cluster.