vfarcic

# Source: https://gist.github.com/93ff695d845bf0653cd75433edb82078

################################################################
# How To Use Helm Charts Inside Kubernetes Kustomize Manifests #
# https://youtube.com/shorts/2GXC8WtpySc                       #
################################################################

# Additional Info:
# - Kustomize - How to Simplify Kubernetes Configuration Management: https://youtu.be/Twtbg6LFnAg
# - Helm vs Kustomize - The Fight Between Templating and Patching in Kubernetes: https://youtu.be/ZMFYSm0ldQ0

noseka1

Examples

$ kubectl get pods -o json
$ kubectl get pods -o jsonpath='{@}'
$ kubectl get pods -o jsonpath='{.items[0]}'
$ kubectl get pods -o jsonpath='{.items[0].metadata.name}'
$ kubectl get pods -o jsonpath="{.items[*]['metadata.name', 'status.capacity']}"
$ kubectl get pods -o jsonpath='{range .items[*]}{.metadata.name}{"\t"}{.status.startTime}{"\n"}{end}'
$ kubectl get pods -o jsonpath='{.items[*].status.podIP}'

shift

UEFI/iPXE booting Raspberry Pi for Flatcar Linux

Download and compile the following https://github.com/pftf/RPi4.git. I made the following change to edk2-platforms to always enable 3GB RAM+ as TFTP booting this seems to cause issues with it remembering the options.

diff --git a/Platform/RaspberryPi/RPi4/RPi4.dsc b/Platform/RaspberryPi/RPi4/RPi4.dsc
index c481c35342..4b495b1fe8 100644
--- a/Platform/RaspberryPi/RPi4/RPi4.dsc
+++ b/Platform/RaspberryPi/RPi4/RPi4.dsc
@@ -495,7 +495,7 @@

superseb

k3s etcd commands

etcd

Setup etcdctl using the instructions at https://github.com/etcd-io/etcd/releases/tag/v3.4.13 (changed path to /usr/local/bin):

Note: if you want to match th etcdctl binaries with the embedded k3s etcd version, please run the curl command for getting the version first and adjust ETCD_VER below accordingly:

curl -L --cacert /var/lib/rancher/k3s/server/tls/etcd/server-ca.crt --cert /var/lib/rancher/k3s/server/tls/etcd/server-client.crt --key /var/lib/rancher/k3s/server/tls/etcd/server-client.key https://127.0.0.1:2379/version

dixneuf19

Setup python, pip, virtualenv and virtualwrapper, with zsh on a new machine

Strongly inspired by https://gist.github.com/heymonkeyriot/9a2f429caff5c091d5429666fa080403.

Installing Python & Pip

On Ubuntu :

sudo apt install python3 python3-pip

avishayp

# non root user example for alpine
#
# usage:
# $ docker build --build-arg "USER=someuser" --tag test .
# $ docker run --rm test

FROM alpine

ARG USER=default
ENV HOME /home/$USER

danielepolencic

3 Virtual Machines Kubernetes cluster

Dependencies

You should install VirtualBox and Vagrant before you start.

Creating the cluster

You should create a Vagrantfile in an empty directory with the following content:

ruanbekker

My Elasticsearch cheatsheet with example usage via rest api (still a work-in-progress)

Shortlinks:

• Cluster Health
  • Index Level
  • Shard Level
• Nodes Overview
• Indices Overview
• Cluster Maintenance

jctosta

Screen Quick Reference

Basic

Description	Command
Start a new session with session name	screen -S <session_name>
List running sessions / screens	screen -ls
Attach to a running session	screen -x
Attach to a running session with name	screen -r

memphys

source: http://www.skorks.com/2009/09/bash-shortcuts-for-maximum-productivity/

Command Editing Shortcuts

• Ctrl + a – go to the start of the command line
• Ctrl + e – go to the end of the command line
• Ctrl + k – delete from cursor to the end of the command line
• Ctrl + u – delete from cursor to the start of the command line
• Ctrl + w – delete from cursor to start of word (i.e. delete backwards one word)
• Ctrl + y – paste word or text that was cut using one of the deletion shortcuts (such as the one above) after the cursor