Shoaib R Khan shoaibjdev

Common OpenSSL Commands with Keys and Certificates

Generate RSA private key with certificate in a single command

openssl req -x509 -newkey rsa:4096 -sha256 -keyout example.key -out example.crt -subj "/CN=example.com" -days 3650 -passout pass:foobar

Generate Certificate Signing Request (CSR) from private key with passphrase

openssl x509 -x509toreq -in example.crt -out example.csr -signkey example.key -passin pass:foobar

Install `wkhtmltopdf` & `wkhtmltoimage`

wkhtmltopdf and wkhtmltoimage are open source (LGPLv3) command line tools to render HTML into PDF and various image formats using the Qt WebKit rendering engine.

Get the latest version of the RPM directly from the homepage.

wget https://downloads.wkhtmltopdf.org/0.12/0.12.5/wkhtmltox-0.12.5-1.centos7.x86_64.rpm

Install RPM.

Community vs Commercial

When I talk about Red Hat's involvement in RDO (http://openstack.redhat.com/) the question I often get is, "doesn't that undermine sales of RHEL OSP (Red Hat's paid OpenStack offering)?"

Well, it's complicated.

	create VMs

	git clone https://github.com/kubernetes-incubator/kargo.git
	cd kargo
	cp ~/inventory.cfg inventory/.
	vi inventory.cfg
	(copy IPs and save)
	date
	ansible-playbook -u centos -b -i inventory/inventory.cfg cluster.yml
	date (show elapsed time)

	[etcd]
	10.42.10.206

	[kube-master]
	10.42.10.206

	[kube-node]
	10.42.10.221
	10.42.10.223

	---
	# container networks, safe to leave these as defaults
	cidr_networks:
	container: 172.29.236.0/22
	tunnel: 172.29.240.0/22
	storage: 172.29.244.0/22

	# IPs from your tunnel and container networks that you want to reserve for the hosts
	used_ips:
	- 172.29.236.1

	#Download and extract logstalgia
	brew install wget
	wget https://github.com/acaudwell/Logstalgia/releases/download/logstalgia-1.0.7/logstalgia-1.0.7.tar.gz
	tar -zxvf logstalgia*.gz
	cd logstalgia*

	# Install logstlagia dependencies
	#brew install ttfautohint --with-qt
	brew install pkg-config glew sdl2 SDL2_image sdl SDL_image boost GLM freetype pcre

	var net = require("net");

	process.on("uncaughtException", function(error) {
	console.error(error);
	});

	if (process.argv.length != 5) {
	console.log("usage: %s <localport> <remotehost> <remoteport>", process.argv[1]);
	process.exit();
	}

	map $ssl_client_s_dn $ssl_client_s_dn_cn {
	default "";
	~/CN=(?<CN>[^/]+) $CN;
	}

	server {
	listen 80;
	listen [::]:80;

	listen 443 ssl;