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Proxmox High Availability

Proxmox High Availability

By : CHENG MAN
4.3 (4)
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Proxmox High Availability

Proxmox High Availability

4.3 (4)
By: CHENG MAN

Overview of this book

If you want to know the secrets of virtualization and how to implement high availability on your services, this is the book for you. For those of you who are already using Proxmox, this book offers you the chance to build a high availability cluster with a distributed filesystem to further protect your system from failure.
Table of Contents (10 chapters)
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Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Basic Concepts of a Proxmox Virtual Environment
1. Basic Concepts of a Proxmox Virtual Environment
Introduction to Proxmox Virtual Environment
Introduction to server virtualization
Server virtualization basics – guest versus host
Comparing types of server virtualization software
Basic administration on Proxmox VE
Virtualization options in Proxmox VE
Virtual disk options under Proxmox VE
Introducing the OpenVZ template
Summary
2
2. Getting Started with a High Availability (HA) Environment
2. Getting Started with a High Availability (HA) Environment
What is a high availability (HA) environment?
Introducing a Proxmox VE cluster
System requirements for the Proxmox cluster
HA capability for Proxmox with a two-node cluster
Summary
3
3. Key Components for Building a Proxmox VE Cluster
3. Key Components for Building a Proxmox VE Cluster
Key component 1 – shared storage
Key component 2 – reliable network
Key component 3 – a fencing device
Key component 4 – quorum disk
Summary
4
4. Configuring a Proxmox VE Cluster
4. Configuring a Proxmox VE Cluster
Configuring a network for a Proxmox VE cluster
Preparing storage for a Proxmox cluster
Configuring a Proxmox VE cluster
Network fencing with a Cisco switch via SNMP
Building a Gluster filesystem for a Proxmox cluster
Building a Ceph filesystem for a Proxmox cluster
Summary
5
5. Testing on a Proxmox Cluster
5. Testing on a Proxmox Cluster
Storage preparation for an LVM shared storage
Demonstration of live migration
Building an HA-protected VM
Testing with the cluster environment
Setting up a failover domain
Summary
6
6. System Migration of an Existing System to a Proxmox VE Cluster
6. System Migration of an Existing System to a Proxmox VE Cluster
System migration of an existing Linux platform
Live migration of a physical machine to a KVM
System migration of a Windows platform
System migration from VMware to Proxmox
System migration from XenServer / Hyper-V Server to Proxmox
Summary
7
7. Disaster Recovery on a Proxmox VE Cluster
7. Disaster Recovery on a Proxmox VE Cluster
Backup process for VMs in Proxmox
The restore process of VMs in Proxmox
Setting up a scheduled backup for the VMs
System recovery of a Proxmox cluster failure
Summary
8
8. Troubleshooting on a Proxmox Cluster
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8. Troubleshooting on a Proxmox Cluster
Troubleshooting system access problems
Troubleshooting system migration problems
Troubleshooting system storage problems
Troubleshooting Proxmox cluster problems
Summary
9
Index
Index

Troubleshooting system storage problems

In the previous chapters, we introduced three different storage systems, namely GlusterFS, CEPH, and DRBD volumes. In this section, I will list out the problems I have encountered while building the system for each separate filesystem.

DRBD volume not in synchronization

During a normal operation, data synchronization should be automatically performed. However, there are different scenarios that will cause a synchronization problem. The following problems will be covered in this section:

  • Need access to up-to-date data

  • Node with Diskless status

  • Node with Unknown status

Need access to up-to-date data during service initialization

Root cause: Your system might indicate that the data inside the current node (in the following example, vmsrv02) is not up to date, and the resynchronization does not take place probably because of the timeout.

Solution: So, we need to tell the DRBD service to copy data from a peer node by overwriting the data in the current node....

End of Section 3
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