Use iPerf to test NIC speed between two ESXi hosts

Sometimes you want/need use iPerf to test the nic speed between two ESXi hosts. I did because I was seeing a NIC with low throughput in my lab.

How can we test raw speeds between the two hosts? iPerf comes to the rescue. I was looking on how to do this on an ESXi host. I doesn’t come as a surprise that I found the solution here at William Lams’ virtuallyghetto.com. Apparently iperf has been added to ESXi since 6.5 U2. You used to have to copy iperf to iperf.copy. In ESXi 7.0 that has been done for you, although you will need to look for /usr/lib/vmware/vsan/bin/iperf3.copy

ESXi host 1 (iperf server)

Disable the firewall:

Change to the directory containing the iperf binary

Execute iPerf as server

Overview of the used parameters:

-swill start iperf as server
-Bdefines the IP the iperf server will listen to

Disable the firewall

ESXi host 2 (iperf client)

Change to the directory containing the iperf binary

Execute iPerf as client

Overview of the used parameters:

-iwill determine the interval of reporting back
-ttime iperf will be running
-cclient ip, will force the usage of the correct vmkernel interface
-fmdefaults to kbit/s, adding m will use mbit/s

Don’t forget to re-enable the firewall on both systems.

esxcli network firewall set --enabled true

Cross vCenter vMotion Utility

Whilst upgrading the home lab I also decided to rebuild from scratch. There were some challenges to overcome because I have running VMs I don’t want to shut while migrating.

My current home lab setup and the go to setup is documented here (work in progress). Basically it comes down to:

  1. Original setup: three hosts backed with iSCSI storage for running the VMs
  2. Temporary setup:
    1. New vCenter with two of the three hosts configured for vSAN with connection to the iSCSI datastores
    2. Old vCenter with one remaining host running all of the VMs
  3. Destination setup: new vCenter with vSAN datastore

To migrate the virtual machines from the old environment (from the last remaining host to the two new hosts) I decided to take a look at the ‘Cross vCenter vMotion Utility‘. There is not a lot of documentation available at first sight but it is straightforward to set up and configure. Although I did find some things that are worth noting.

Step 1 : Running the jar

To start the Cross vCenter vMotion Utility one must run a jar file: ‘java -jar xvm-2.6.jar’.

I am running linux (Pop!_OS 18.04) as my OS. I have java version 8 and 11 installed with version 11 as default. Version 11 is not listed on the fling site as supported (Java Runtime Environment 1.8-10: See requirements). Running with version 11 (sudo java -jar xvm-2.6.jar) starts the local website on port 8080 (http://localhost:8080) but does not report back on the CLI.

Under the assumption that the java application started and failed right away, I decided to run it on my windows box which has Java Runtime environment 8 installed. The last line of feedback ‘Initialized controller with empty state’ was the same as on my linux machine. Navigating to localhost:8080 showed the Cross vCenter vMotion Utility web interface. I could now configure the application and run migrations.

It is only later when I closed the running instance on my linux box and restarting it that it showed me output on the CLI that the application started successfully.

Output after restart:

Step 2 : Configuration

  • Register connections
    1. Source vCenter
    2. Destination vCenter

Step 3 : Migration

  • Add migrations
    1. Source Site: source vCenter
    2. Target Site: destination vCenter
    3. Source Datacenter
    4. Virtual Machine(s): Select one or more virtual machines
    5. Placement Target: Cluster or Host
    6. Target Datastore
    7. Network Mapping(s): the utility will detect the source networks for all selected virtual machines and display a selection field for the target network

Issues

Storage vMotion?

Storage vMotion does not seem to be supported. I tried to svMotion my machines from their iSCSI based datastores to the newly created vSAN datastore but it failed.

Target Datastore: Shared datastore (same as source)

Choosing ‘Shared datastore (same as source)’ as Target Datastore fails and throws the following error:

I added the destination host and tried again but it also failed with several issues:

  • destination networks were not listed, only a subset were – although all were added to the distributed vSwitch
  • matching datastore was not found on the destination host

I could migrate to the new environment but had to select a destination datastore. This posed not much of a problem in my environment because the end goal was to get the virtual machine on the vSAN datastore.

After migrating most of the virtual machines, only two types of virtual machines were left, it felt like I could take a step back if needed. The following types were left to migrate, the vCenter VMs and the firewall VMs. The old vCenter is not needed anymore, the new vCenter and the firewall VMs are and once those are migrated I can go break down the last part of the old setup. The last host will be reset to default settings via the DCUI after which it can be added to the vSAN cluster and I can make the vSAN cluster setup complete. A tmp_vSAN_policy with no redundancy is not the way you (or me) want to run your environment, even if it is a lab environment.

Conclusion

I could not migrate from the old environment to the new environment while also doing a Storage vMotion, I needed to go in steps.

Nevertheless I’m happy to have used the Cross vCenter vMotion Utility. It did save me a lot of work, required little setup and configuration. I didn’t need to change anything to the setup of my old nor my new environment.

Why you should register for one of the last seats available at #vmugbe

What does the VMware User Group means to me?

Well it is already more than a decade ago since I visited my first VMUGBE. I have seen the event grow from 15 visitors to more than 200. The last couple of years it is hosted in the LAMOT event center in Mechelen which is a superb venue. Ever since the first time I only missed a couple due to other obligations but when I attended I took home a lot of info, knowledge and new visions. Going to VMUGBE throughout the years have made me grow due to the sessions and the peers available.

A couple of years ago I met @kim_bottu who engaged me in becoming a #vExpert. Now two years in a row I am awarded being part of this vExpert community and VMUGBE facilitated this in a way. A lot of the Belgian vExperts come year after year and are very open people ready to chat.

These are a couple of the vExperts that will be attending this year:

  • Erik Schils
  • Stijn Depril
  • Tom Vallons
  • Maarten Van Driessen
  • Frederiek Van Hoornick
  • Luc Dekens
  • Jose Cavalheri
  • Maarten Caus
  • Niels Engelen
  • Alain Geenrits
  • Jurgen Van de Perre
  • Wouter Kursten
  • Hans Kraaijeveld
  • Johan Van Amersfoort
  • Harold Preyers
  • and …

Why should you attend?

It is a FREE #vCommunity networking event with top speakers. There is top relevant content available from CNA to Horizon View and VMware Cloud on AWS to VMware Blockchain and IOT. It is all VMware related and there is some marketing stuff yes (which make the event FREE) but most is community driven and real world examples.

There are 16 sessions in total, 3 parallel tracks with 4 sessions in the morning and 4 in the afternoon. There will be a small breakfast, a free lunch, a free BBQ and a chance to win a smartphone.

What sessions am I looking forward to?

Maarten Van Driessen (@mvandriessen) will share his knowledge from the field about VVOLS. I have never worked with VVOLS so I’m curious. My lab has Synology based storage and sadly Synology does not support VVOLS. I’m personally looking forward to this session.

Maarten is blogging at brisk-it.net

https://www.vmug.be/sessions/unlocking-the-power-of-spbm-with-traditional-storage-arrays/

Our very own Luc Dekens (@lucd) will tell you about PowerCLI. Even if you know everything about PowerCLI this is a session to attend. I have been at several Luc his sessions and for me these gave me new insights about challenges I had.

Luc is blogging at lucd.info

https://www.vmug.be/sessions/powercli-the-power-of-code/

Johan van Amersfoort (@vhojan) is an easy to listen to speaker which has his session right after lunch. He will tell about a project where they used the VDI infrastructure to do a whole other thing during the nighttime. Don’t miss out on this session. I have missed this session twice so I will be now. Third time is a charm.

Johan is blogging at vhojan.nl

https://www.vmug.be/sessions/sponsor-itq-vdi-by-day-compete-by-night/

Last but not least the #vExpert Community session led by Stijn Depril (@sdepril). This sessions is one of the last sessions and will try to highlight why you should become a #vExpert. I will be on the #vExpert panel during this session so if you want to see me sweat (it is my first public speaking session) you should attend this session. We will share a lot of personal views and insights during this session.

Stijn is blogging at vmusketeers.com

https://www.vmug.be/sessions/vexpert-community-session/

I could go highlight a lot more sessions but that content is all available on https://www.vmug.be/

Key takeaways and tips:

  • Be there on time as the opening keynote speaker is Joe Baguley (@joebaguley) from VMware and last year it was a cool story to hear.
  • If you are attending, take the time to come to speak to me. I still am a shy guy.
  • Step out of your comfort zone, take your lunch to a table and start to chat.
  • Knowledge is about sharing.

Thanks

I want to thank @erikschils for all his efforts in organising the VMUGBE all these years.

I also want to thank those who have attended the previous VMUGBE events and those who will be attending this year. You are the ones that make these events a success.

Horizon Client Installer Failed

The Horizon Client installer generates the following errors for Multimedia Redirection:

Adding the following symlinks made the failure message go away. I’m wondering though if the packages get updated in the repositories whether this will break the Multimedia Redirection (MMR). I guess I’ll notice some day.

Update (2019/12/20): Today I updated from version 5.2 to 5.3 and ran into the same issue again. I noticed that there are symbolic links present but that they linked to the old versions. After updating the symbolic links the installer was happy again.

Through https://communities.vmware.com I found
https://www.werts.nl/vmware-view-horizon-client-for-linux-on-ubuntu-18-04-failed/

Unsupported upgrade of VCSA 6.5 U2 to 6.7

I decided to upgrade the vCenter Server Appliance from 6.5 U2 to 6.7 though it is not supported, see VMware KB. As this is not supported you will NOT want go ahead with this in a production environment. Maybe I will have regrets later on too … but this is my lab environment so the alternative is to redeploy a new VCSA.

Update:

While it was not possible at the time of writing of this post. This VMware KB has been updated with the following information.

Important:
vSphere 6.5 Update 2d and higher are not supported to upgrade to vSphere 6.7 Update 1.
vSphere 6.5 Update 2d and higher are supported to upgrade to vSphere 6.7 Update 2. For more information, see VMware Product Interoperability Matrices.


I have applied the following knowledge base articles on the source VCSA:

The first KB was applied because the installer is failing due to a lack of disk space on the source appliance. The installer gives the opportunity to supply a location on the source VCSA to export the necessary files that facilitate the upgrade.

The second KB was applied because the VMware Directory failed during the firstboot phase after the upgrade succeeded.

I downloaded the sources for VCSA 6.7.0 but had to go and download the sources for VCSA 6.7.0a. The VCSA 6.7.0 sources stalled at 5% on VMware Identity Management Service.

I also went to change the root password expiration to no and set the administrator@vsphere.local account password to only include alphabet characters.

The installer will also fail after the first phase if the VAMI port is not reachable, the first phase will finish succesfully though. I forgot to add an exception to my firewall. You can then continue the installer by going to the VAMI interface on port 5480.