Tho Manh v-thomp4

Server Price Breakdown: DigitalOcean, Amazon AWS LightSail, Vultr, Linode, OVH, Hetzner, Scaleway/Online.net:

$5/mo

Provider	Type	RAM	Cores	Storage	Transfer	Network	Price

Reference - https://www.eriksmistad.no/getting-started-with-google-test-on-ubuntu/

sudo apt-get install libgtest-dev

sudo apt-get install cmake # install cmake

cd /usr/src/gtest

sudo cmake CMakeLists.txt

Lets Encrypt has removed their ACME V1 api in favor of ACME V2. The Rancher 1.6 catalog entry for Lets Encrypt certificates doesn't support this api. There is a forked version of the repo, however the service has to be created manually instead of from the catalog.

Create a new service, give it a name, use vxcontrol/rancher-letsencrypt:v1.0.0 for the image
In the "Volumes" tab, add a volume /var/lib/rancher:/var/lib/rancher
In the "Command" tab, set the "Console" option to none
Click to add an Environment Variable, and paste the following into the first "Variable" input field.

All of the environment variables should auto-fill.
Fill in the necessary values

Motivatation

modern CMake is required for building a lot of new software
CMake is dependency for many packages (e.g. ROS related)
we don't want to remove CMake (which would remove packages that depend on it)
we want safe procedure to update CMake that can be reversed easily

Current version in OS

Check current version

About

I faced bandwidth issues between a WG Peer and a WG server. Download bandwidth when downloading from WG Server to WG peer was reduced significantly and upload bandwidth was practically non existent.
I found a few reddit posts that said that we need to choose the right MTU. So I wrote a script to find an optimal MTU.
Ideally I would have liked to have run all possible MTU configurations for both WG Server and WG Peer but for simplicity I choose to fix the WG Server to the original 1420 MTU and tried all MTUs from 1280 to 1500 for the WG Peer.

Testing

On WG server, I started an iperf3 server
On WG peer, I wrote a script that does the following:
- wg-quick down wg0
Edit MTU in the /etc/wireguard/wg0.conf file

	#!/bin/sh

	# Make sure to:
	# 1) Name this file `backup.sh` and place it in /home/ubuntu
	# 2) Run sudo apt-get install awscli to install the AWSCLI
	# 3) Run aws configure (enter s3-authorized IAM user and specify region)
	# 4) Fill in DB host + name
	# 5) Create S3 bucket for the backups and fill it in below (set a lifecycle rule to expire files older than X days in the bucket)
	# 6) Run chmod +x backup.sh
	# 7) Test it out via ./backup.sh

	pipeline {
	agent { node { label 'swarm-ci' } }

	environment {
	TEST_PREFIX = "test-IMAGE"
	TEST_IMAGE = "${env.TEST_PREFIX}:${env.BUILD_NUMBER}"
	TEST_CONTAINER = "${env.TEST_PREFIX}-${env.BUILD_NUMBER}"
	REGISTRY_ADDRESS = "my.registry.address.com"

	SLACK_CHANNEL = "#deployment-notifications"

	#!/bin/bash
	###
	### my-script — does one thing well
	###
	### Usage:
	### my-script <input> <output>
	###
	### Options:
	### <input> Input file to read.
	### <output> Output file to write. Use '-' for stdout.