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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 Proxmox cluster problems

In this section, we will go through some common problems that we encounter during the operation of a Proxmox cluster, which are as follows:

  • HA VM start up problem

  • The fenced cluster node cannot recover automatically

  • The cluster member node cannot join back with the cluster

  • The cluster service cannot be restarted because of the DLM lockspace

  • Activity blocked within the cluster

Unable to start the HA-enabled VM

Symptom: When you try to start an HA-enabled VM, the operation fails with the following output:

Executing HA start for VM 201
Member vmsrv01 trying to enable pvevm:201… Aborted; service failed
TASK ERROR: command 'clusvcadm -e pvevm:201 -m vmsrv01' failed: exit code 254

Root cause: So, if you start the HA-enabled VM again, the process will still be unsuccessful with the same output. The problem is that the VM 201 is in the failed status, and so it cannot be turned on:

Solution: The HA service with the failed status cannot be used until we re-enable...

End of Section 4
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