Book Image

VMware vSphere Troubleshooting

Book Image

VMware vSphere Troubleshooting

Overview of this book

VMware vSphere is the leading server virtualization platform with consistent management for virtual data centers. It enhances troubleshooting skills to diagnose and resolve day to day problems in your VMware vSphere infrastructure environment. This book will provide you practical hands-on knowledge of using different performance monitoring and troubleshooting tools to manage and troubleshoot the vSphere infrastructure. It begins by introducing systematic approach for troubleshooting different problems and show casing the troubleshooting techniques. You will be able to use the troubleshooting tools to monitor performance, and troubleshoot issues related to Hosts and Virtual Machines. Moving on, you will troubleshoot High Availability, storage I/O control problems, virtual LANS, and iSCSI, NFS, VMFS issues. By the end of this book, you will be able to analyze and solve advanced issues related to vShpere environment such as vcenter certificates, database problems, and different failed state errors.
Table of Contents (16 chapters)
VMware vSphere Troubleshooting
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Installing VMware vRealize Operations Manager
Power CLI - A Basic Reference
Index

Insufficient resources and vSphere HA failover


In vSphere infrastructure, we will come across many known problems in highly available clusters. In this section, we will start investigating and understanding different problems regarding insufficient resources and see how vSphere uses admission control to ensure the availability of these resources.

Here are some tips that you should follow before directly addressing the errors that will be discussed later:

  • Ensure your shared storage/SAN/NAS is accessible from your vSphere hosts. You can also check the connectivity at Layer 2 and at the storage layer.

  • Always verify that your vSphere networking is working normally and that you are able to reach your vCenter server, management network, gateways. Further, ensure that your vCenter server is able to reach to your vSphere hosts. I will cover this in the Network Troubleshooting section.

  • Logs, as discussed in Chapter 1, The Methodology of Problem Solving, can be the best starting point for troubleshooting...