Log4jShell vulnerability

1. Kasperky article
2. https://www.lunasec.io/docs/blog/log4j-zero-day-update-on-cve-2021-45046/ with the following "news":If you have previously used LOG4J_FORMAT_MSG_NO_LOOKUPS to mitigate the log4shell vulnerability, in certain conditions this will not be sufficient to protect your code from RCE. Refer to our mitigation guide for additional steps you can take to remediate the impact of Log4Shell
3. Apache group released two fix in short delay, after  the second fix was found vulnerable to other attacks, a third fix (2.17.0) was released.

1. Shutdown VM and compress the compact the disks
2. Check if you have enough space: you need more or less the space of the VM disks+ minimal RAM configured
3. From your Hyper-V host, run PowerShell as an administrator and then run something like: GET-VM This will display all the VMs running on the current host.
4. Then run:

   $ExportPath = “C:\\Exports”
   Export-VM -Name “BoxNameFromGetVM Step3” -Path $ExportPath

    

On 2023 Ubuntu 18 LTS support will end, so I started to evaluate the next LTS release, Ubuntu 20.

Apache Cassandra Compendium, pasting together documentation from https://cassandra.apache.org/doc/latest/cassandra/data_modeling/index.html

K8s is a very complex beast. But it give you a very good set of security defaults, and it is also a very well done implementation of a microservice application.