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Ephemeral Containers demo

Ephemeral Containers are available (as beta) from Kubernetes 1.23:

Pods are the fundamental building block of Kubernetes applications. Since Pods are intended to be disposable and replaceable, you cannot add a container to a Pod once it has been created. Instead, you usually delete and replace Pods in a controlled fashion using deployments.

Sometimes it's necessary to inspect the state of an existing Pod, however, for example to troubleshoot a hard-to-reproduce bug. In these cases you can run an ephemeral container in an existing Pod to inspect its state and run arbitrary commands.

Example: capturing Pod network traffic

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Wilks coefficient function for Google Sheets

About the Wilks coefficient

The Wilks coefficient or Wilks formula is a mathematical coefficient that can be used to measure the relative strengths of powerlifters despite the different weight classes of the lifters.

(source)

Adding custom functions to Google Sheets

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#!/bin/bash

nameservers=(a1-207.akam.net. a20-66.akam.net. a14-66.akam.net. a6-64.akam.net. a7-67.akam.net. a5-64.akam.net.)


success=0
failure=0

for n in $(seq 0 100); do
	for ns in ${nameservers[@]}; do