Trung Lê runlevel5

SSH into master node
Modify spec.containers.command in /etc/kubernetes/manifests/kube-apiserver.yaml to have - --enable-aggregator-routing=true flag if you do not run kube-proxy on a host running the API server
Fetch manifest file https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.3.6/components.yaml
Search and replace amd64 with ppc64le with command: sed -i 's/amd64/ppc64le/g' components.yaml
Start the metric servers with kubectl apply -f components.yaml

Get pods by selectors

kubectl get pods --selector <key>=<value>

Count pods by selectors

kubectl get pods --selector <key>=<value> --no-headers=true | wc -l

How to taint a node

How to change GNOME background settings:

use dconf-editor or gsettings to change following properties:

org.gnome.desktop.background.picture-uri file:///home/tle/Pictures/pattern4.png
org.gnome.desktop.background.picture-options 'wallpaper'
org.gnome.desktop.background.primary-color #3c6eb4
org.gnome.desktop.background.secondary-color #294172

How to create wallpaper profile?

Debian buster ppc64el

portable libyaml

cd /tmp
wget https://github.com/yaml/libyaml/archive/dist-0.2.2.tar.gz
tar xzvf dist-0.2.2.tar.gz
cd libyaml-dist-0.2.2
mkdir -p $HOME/.linuxbrew/Homebrew/Cellar/portable-libyaml/0.2.2
./configure --enable-static --disable-shared --disable-dependency-tracking --prefix=$HOME/.linuxbrew/Homebrew/Cellar/portable-libyaml/0.2.2

ERROR LOG

Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:
Change Dir: /home/tle/src/devilutionX/build/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/gmake cmTC_ce964/fast && /usr/bin/gmake -f CMakeFiles/cmTC_ce964.dir/build.make CMakeFiles/cmTC_ce964.dir/build
gmake[1]: Entering directory '/home/tle/src/devilutionX/build/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_ce964.dir/src.c.o
/usr/bin/cc -DCMAKE_HAVE_LIBC_PTHREAD -o CMakeFiles/cmTC_ce964.dir/src.c.o -c /home/tle/src/devilutionX/build/CMakeFiles/CMakeTmp/src.c

How to combine many queries together in query? Simply use bool boolean with must

{
  "query: {
    "bool": {
      "must": [
        { <query 1> },
        { <query 2> }
 ]

There are many ways to parse in variable into the nginx config file. Some uses set_by_lua which is offered by lua-nginx-module. Some use envstubst to populate varilabes into a template file.

Today I am going to show you how to do that with njs the JS scripting engine for nginx.

## /etc/nginx/fetch_env.js
function fetch_upstream_host(r) {
 return process.env.UPSTREAM_HOST;

	#!/bin/bash
	set -e

	## CRI containrd
	## CNI flannel

	# Alpine Edge only! Let's hope alpine 3.13 or 3.14 would have k8s in main tree
	echo http://dl-cdn.alpinelinux.org/alpine/edge/testing >> /etc/apk/repositories
	echo http://dl-cdn.alpinelinux.org/alpine/edge/community >> /etc/apk/repositories

	$ cat /etc/os-release
	NAME=Fedora
	VERSION="31 (Server Edition)"
	ID=fedora
	VERSION_ID=31
	VERSION_CODENAME=""
	PLATFORM_ID="platform:f31"
	PRETTY_NAME="Fedora 31 (Server Edition)"
	ANSI_COLOR="0;34"
	LOGO=fedora-logo-icon

	Homebrew build logs for binutils on 3.10.0-1127.el7.ppc64le
	Build date: 2020-05-26 11:05:42