Monthly Archives: November 2019

Errno 28 When Trying to Update VMware ESXi 6.7.0 Update 2 to Update 3

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When trying to update/upgrade ESXi 6.7.0 Update 2 to Update 3 (via software profile update command) you may run into the following error below. This was a host running specifically Update 2 build 13644319.

[InstallationError]
[Errno 28] No space left on device
vibs = VMware_locker_tools-light_10.3.10.12406962-14141615
Please refer to the log file for more details.

When attempting to update to build 15160138, the failure is related to: vibs = VMware_locker_tools-light_11.0.1.14773994-15160134, you can substitute this version into the commands below.

The solution is to manually install VMware_locker_tools package by following these steps via SSH on the host:

  1. cd /tmp
  2. wget http://hostupdate.vmware.com/software/VUM/PRODUCTION/main/esx/vmw/vib20/tools-light/VMware_locker_tools-light_10.3.10.12406962-14141615.vib
  3. esxcli software vib install -f -v /tmp/VMware_locker_tools-light_10.3.10.12406962-14141615.vib
  4. Once you receive verification that the Operation finished successfully, try the profile update command again to patch ESXi.

Create a custom alias for a RemoteApp in Windows Server 2012 R2

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Edit: fixed a typo in the command in step 3

For Windows Server 2012 R2 it’s not possible to change the alias of an existing RemoteApp. However it is possible to set a custom alias when creating a new RemoteApp using PowerShell.  The steps:

  1. Unpublish the existing RemoteApp
  2. Start PowerShell
  3. Issue the following command to publish the new app with your desired alias. Note that folder name is optional. The collection name you can find in Server Manager under Remote Desktop Services -> Collections. 
    New-RDRemoteApp -CollectionName "YourCollectionName" -Alias "YourAlias" -DisplayName "YourDisplayName" -FolderName "YourFolderName" -FilePath "C:\path\to\executable.exe"

References:

https://learn.microsoft.com/en-us/powershell/module/remotedesktop/new-rdremoteapp?view=windowsserver2016-ps

Adjust Date/Time in Windows Server 2019

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When attempting to change the timezone in Windows Server 2019 you may run into the following problems:

  • The change button in Windows Settings for Date & Time is greyed out
  • Receive an error message when clicking Change Time Zone button in Control Panel Date and Time, even though you are an administrator:
    Unable to continue
    You do not have permission to perform this task. Please contact your computer administrator for help.

The solution is to force the Control Panel Date and Time applet to run separately with administrator privileges:

  1. Click Start
  2. Type timedate.cpl
  3. Right click on the resulting Control panel item
  4. Choose Run as administrator
  5. Now you can adjust the time freely

Let’s Encrypt Suddenly Failing to Renew a Certificate

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On a Ubuntu 18.04 bionic system I suddenly started getting errors with certbot for one domain while certificates for other domains on the same system were renewing without errors.  Performing a –dry-run would result in various error messages, such as:

DNS problem: SERVFAIL looking up CAA for …

Remote PerformValidation RPC failed

Unfortunately, an error on the ACME server prevented you from completing authorization. Please try again later.

Running certbot renew with the additional flag –debug-challenges and inspecting the letsencrypt.log revealed the following:

Invalid Content-Type header on POST. Content-Type must be “application/jose+json”

The solution was to simply update certbot on the system

sudo apt-get update
sudo apt-get upgrade