Today we will look at how to use Ansible to update Splunk UF (Universal Forwarder) configuration. The benefits of using Ansible to achive this are:
- Save the hassel to manually modify conf files of syslog-ng and splunk uf.
- Codify Splunk UF configuratoin, so they can be version controlled via GitHub.
- Automate multiple UFs update without the need to ssh to each single server. - The playbook can also be used to configure newly provisioned Spunk UF.
I recently ran into an issue after update Exchange 2016 from CU15 to CU17. The upgrade installation took around an hour, but was eventually completed successfully according to the Installation Wizard at least. When I tried to access ECP, I got the error below even before the login page shows up. At the meantime, Exchange Management Shell is inaccessible due to the error.
In the eventlog, there are lots of 1003 errors relate to MSExchange Front End HTTP Proxy.
Recently I had the need to create a Lambda function with PowerShell 7. The function is to synchronize data between two REST APIs. It’s fairly simple, but does need to use a custom made module. I spent quite bit time to find out how to deploy PowerShell Lambdas with custom modules. Thought might write a guide to help people want to do the same. My script is fairly simple, it gets a list of users from one API and then convert it to a XML format object and export into the target API.
Finally, PowerShell 7 is now GA! As a heavy WSL user, I was keen to see how some of its new features will work in WSL1 (Ubuntu 4.4.0-18362-Microsoft). Below are the tests I have done.
Installation in WSL
Download the binary from Github repo to a local folder /usr/share/powershell
sudo wget https://github.com/PowerShell/PowerShell/releases/download/v7.0.0/powershell-7.0.0-linux-x64.tar.gz Untar the file
sudo tar xzvf powershell-7.0.0-linux-x64.tar.gz
Add path for your shell
export PATH=/usr/share/PowerShell:$PATH
Reload .bashrc
source .bashrc
We recently have the need to cutover our AWS Direct Connects to a different vendor. In order to carry out the change, I was tasked to find a way to monitor Direct Connect connectivities to our on premise network from our hundreds of VPCs in AWS.
After some discussion with our network engineers and security team, the solution I end up using is to deploy a single EC2 instance into each those VPCs that has a connection to VGW.
Tom Tech Blog