To install Ceph using Cloudnium.net VPS offerings, follow these general steps. These steps assume you have some familiarity with managing VPS instances and basic Linux administration.

Prerequisites

  1. Cloudnium.net Account: Ensure you have an active account with Cloudnium.net and have access to their VPS offerings.
  2. VPS Setup: Set up multiple VPS instances (at least three for a basic Ceph cluster) through Cloudnium.net. Each VPS should have sufficient resources (CPU, RAM, Disk) based on Ceph’s requirements.
  3. Operating System: Install a supported Linux distribution (e.g., Ubuntu 20.04 LTS) on each VPS.

Step-by-Step Guide

Step 1: Set Up Initial VPS Instances

  1. Provision VPS Instances:
    • Log into your Cloudnium.net account.
    • Provision at least three VPS instances. For a basic setup, ensure each instance has:
      • Minimum 2 CPU cores
      • 2 GB RAM
      • 20 GB storage for the operating system
      • Additional storage for Ceph OSDs
  2. Access VPS Instances:
    • Access each VPS via SSH. Use the credentials provided by Cloudnium.net.

Step 2: Install Ceph Prerequisites

  1. Update System Packages:shCopy codesudo apt update sudo apt upgrade -y
  2. Install Necessary Packages:shCopy codesudo apt install -y ntp ntpdate wget

Step 3: Deploy Ceph Using Cephadm

  1. Install cephadm:
    • On all nodes, run:shCopy codecurl --silent --remote-name --location https://github.com/ceph/ceph/raw/master/src/cephadm/cephadm chmod +x cephadm sudo mv cephadm /usr/local/bin/
  2. Bootstrap the Ceph Cluster:
    • Choose one node to be the initial monitor and manager. On this node, run:shCopy codesudo cephadm bootstrap --mon-ip <IP_OF_THIS_NODE>
    • Replace <IP_OF_THIS_NODE> with the actual IP address of the node.
  3. Add SSH Keys:
    • Copy the SSH key from the bootstrapped node to all other nodes:shCopy codesudo ceph cephadm generate-key sudo ceph cephadm get-pub-key > ~/ceph.pub ssh-copy-id -f -i ~/ceph.pub <user>@<other_node_ip>
    • Replace <user> and <other_node_ip> with the appropriate username and IP address of the other nodes.
  4. Add Hosts to the Cluster:
    • On the bootstrapped node, add the other nodes:shCopy codeceph orch host add <hostname> <ip_address>
    • Repeat this for each additional node.
  5. Deploy OSDs:
    • List available devices:shCopy codeceph orch device ls
    • Deploy OSDs to the devices:shCopy codeceph orch apply osd --all-available-devices

Step 4: Verify Cluster Health

  1. Check Cluster Status:shCopy codeceph -s
  2. Monitor Health:
    • Use the Ceph dashboard (if enabled) or command line tools to monitor cluster health and performance.

Additional Considerations

  • Networking: Ensure proper networking between all nodes. All Ceph nodes should be able to communicate with each other over the network.
  • Security: Consider setting up firewalls and securing SSH access to the nodes.
  • Monitoring: Set up monitoring tools to keep track of the cluster’s health and performance.

Conclusion

By following these steps, you should be able to set up a basic Ceph cluster using Cloudnium.net VPS offerings. For production use, consider further optimizations and configurations to ensure reliability, performance, and scalability. For more detailed information, refer to the official Ceph documentation.