Check out the following resources:
The links above are great. A few things to consider are the following:
1. New Hardware version
2. New VMFS version (in place upgrade of current datastores are not the same) If you have the storage bring new storage in make it a datastore with 5.1 then migrate to it
3. New VMware tools
4. If you are using VDS then new version of the switch
5. You may want to look into Storage Clusters and Storage DRS.
A logical Plan if you had storage to add might look like this:
1. Maint mode a host
2. Fresh load ESXi 5.1
3. Use host profile (if enterprise plus) to make new 5.1 as equal as possible
4. Manually check new node for all networking etc..
5. Take out of Maint mode
6. Rise and repeat on all nodes
7. Add new storage version 5.1 and make it a storage cluster with Storage DRS enabled
8. Storage VMotion vm's to new storage cluster
9. Upgrade any VDS's required
10. When possible take outages on vm's to upgrade the hardware version and vmware tools
Please let me know if this does not answer your question.
@vmroyale : Thanks for sharing the links. I was looking for some real life problems some one might have faced during the upgrade process and i need to consider them before upgrading.
I was also looking for some one to help me with SSO concept.
to upgrade the datacenter from 4.1 to 5.1, you have to install SSO first and then web client, It can be on a same machine or different machine. these products can even install with vCenter server (Depends on your VM resource configuration)
Once the installation of SSO and web client completes, then you can continue upgrade vCenter inventory service (this service installed along with vCenter 4.1).
The follow regular steps upgrade vCenter server -> vSphere Client -> Update manager -> finally ESXi
SSO loop back address will be asked during the webclient, vCenter inventory service and vCenter server installation/upgrade time.
Decide what kind of installation you need to follow for SSO, is it simple standalone install (basic mode), High availability (You can get SSO HA but need to configure with load balancer) and Multi site deployment (Use full multi site datacenter environment and gives provision to link vCenter server).
Once the SSO installed, add your Active directory /ldap detailed in to SSO identify source and give permission to access vCenter server.
This are more reliable articles, try them
Hope will help you.
1. Open vCenter, select Home – Solutions and Applications – Update Manager in your address bar. Select ESXi Images Tab.
2. Click Import ESXi Image on the top left corner. Click browse and point to the VMware ESXi 5 Hypervisor ISO file. Click Next.
3. Select Install this certificate… and click ignore.
4. This screen displays some information about the ESXi 5 image. Click Next.
5. Select Create a baseline using the ESXi image. Type a name for the baseline, such as ESXi 5 Upgrade and a description if you like. Click Finish.
6. You can now see listed the Imported ESXi 5 Image.
7. Click on Compliance View at the top right hand side. Select the ESXi 4 host that you wish to upgrade and then click Attach at the top right hand corner. Select the Upgrade Baseline (ESXi 5 Upgrade) that you created in the earlier step. Click Attach.
8. Click on Scan at the top right hand side. Select Upgrades and then click Scan.
9. The upgrade may be marked as incompatible but you can still proceed. If the upgrade is marked as incompatible you will be able to click on Upgrade Details.
10. Some software modules will be removed. Check to see that these are not needed as they will be removed once the host is upgraded to ESXi 5. Click Close.
11. Click on Remediate. Make sure your Upgrade Basline is selected. Click Next.
12. Select I accept the terms and license agreement. Click Next.
13. Select Remove installed third-party software that is incompatible… Click Next.
14. Give the task a name and description and select when you would like to remediate the selected hosts. Click Next.
15. Select your power state and retry options. Click Next.
16. Select your Cluster Remediation Options here. Click Next.
17. Check the summary and if you are happy with all the settings click Finish.
18. As you can see my VMware ESXi 4.1 host has finished upgrading to ESXi 5. Press enter to reboot.
19. Once the ESXi 5 host reboots and reconnects to vCenter, the attached baseline is now compliant and is shown with a green tick. Clicking on the host will display the ESXi installed version at the top of the screen. VMware ESXi 5.0.0, 469512.