Category: Uncategorized

Category: Uncategorized

Trouble shooting slow NFS datastores
July 26, 2022 ESXi,Uncategorized,VMware neudorfer

I was recently approached by our server team that we were seeing slow transfer rates on VMs. They noticed it first in their application but were able to run a dd command to shower certain VMs were only getting 4MB/s when they should have been getting up to 1GB/s. This only happened when ran against

Details
LEARN – Getting CRC errors from ESXi hosts
July 26, 2022 ESXi,Uncategorized,VMware neudorfer

I’ve been having a ton of issues with NFS datastores in one of my vcenters. They’re running Dell R640s with two NICs and everything is running fine except when you run IO speed tests. Working with VMware support they pointed out CRCerrors on one of the ports on my host. Cyclic Redundancy Check (CRC) Error indicates

Details
Learn – IBM Cloud setup
July 24, 2022 ESXi,Uncategorized,VMware neudorfer

or neudorfer dot tech 4.0 I finally decided to set aside some time to get this site back up and running. After putting it in the Oracle Cloud Free tier, using this guide , I found out the hard was that it had a habit of shutting itself down. I was luckily able to build

Details
neudorfer.tech version 3.0
March 29, 2022 ESXi,Uncategorized,VMware neudorfer

Quick test to make sure posts still work. Posts still work but plugins cannot be deleted due to permission issues. Need to figure that out.    Things I’ve learned multi-container applications and automate the workflow using Compose Setting up docker in oracle lets encrypt docker/nginx/wordpress SSH keys Terraform https://github.com/rafaelzimmermann/remote-docker

Details
Your site appears to be down
December 15, 2021 ESXi,Uncategorized,VMware neudorfer

So a few days ago I woke up to an email warning me that my site was down. Not a huge deal because this site is just for fun. I decided to start tackling the issue this morning. Logged in and saw some docker containers weren’t running. I proceeded to ‘docker-compose down’ and ‘docker-compose up

Details
LEARN – Testing multiple non-routable IPs using VMKping
October 22, 2021 ESXi,Uncategorized,VMware neudorfer

An issue I’ve run into multiple times is duplicate IP addresses on VMKernals. This becomes a bigger issue when the IP address that is taken is from a Filer that also hosts other storage. When you have two devices fighting over traffic like that it can take down the device. To mitigate that issue we’ve

Details
LEARN – Python ESXi Compatibility Checker
October 18, 2021 ESXi,Uncategorized,VMware neudorfer

UPDATE – Using C:\Windows\py.exe fixed a few issues. I’m not sure if it removes the need for the dependencies.   Find the official VMware Compatibility Guide Here From the Fling Summary “The ESXi Compatibility Checker is a python script that can validate VMware hardware compatibility and upgrade issues of ESXi.” It took me a few

Details
LEARN – Disabling ESXi OpenSLP heap-overflow vulnerability (CVE-2021-21974)
October 12, 2021 ESXi,Uncategorized,VMware neudorfer

Description – OpenSLP as used in ESXi has a heap-overflow vulnerability. VMware has evaluated the severity of this issue to be in the Important severity range with a maximum CVSSv3 base score of 8.8. Functionality Impacts – With the workaround, CIM clients which uses SLP to find CIM servers over port #427 will not be

Details
LEARN – Join ESXi Hosts to Active Directory for Authentication
October 8, 2021 ESXi,Uncategorized,VMware neudorfer

The other week I had a request to join all our ESXi hosts to our Active Directory domain so we could authenticate through our users accounts. This allows for better security, tracking of each users activity, as well as giving us the opportunity to create unique and complex root passwords for each hosts.   To

Details
LEARN – How to setup ESXi from scratch
October 3, 2021 ESXi,Uncategorized,VMware neudorfer

Setting up an ESXi host is easy, free, and gives you the freedom to build multiple servers on one box. ESXi can be installed on a bunch of different hardware but you’ll want to check vmwares compatibility matrix to be certain.   Starting with a server…    

Details