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### Show Active Interfaces
```
$ nmcli con show --active
```

### Create a Bridge Interface
```
$ nmcli con add ifname br0 type bridge con-name br0
Connection 'br0' (892869fe-f8ac-4f17-ace9-b8aeeeee61a0) successfully added.
```

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LUKS crypt

In this guide, I'm going to setup a keyfile-encrypted LUKS partition. I will be using a single, max-size partition on a single physical device. My physical device is located at /dev/sde

partition the physical device

parted /dev/sde

frjaraur

Instructions (works on amd64 and arm64)

A copy/paste guide to getting a full working astro-imaging computer running on Ubuntu 20.04 LTS. Installs latest stable versions of gpsd, KStars, INDI, OACapture, SkyChart, ASTAP, and Astrometry.net.

It uses the lightweight XFCE4 desktop, and allows you to VNC in, running everything locally on the astro-imaging pc.

Install Ubuntu Server 20.04.1

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ESP8266 Web Server to storing ap config to EEPROM.

Original by chriscook8 from esp8266.com I just modified to use ESP8266WebServer library for easy to handle the http request.

This is sample code not yet complete.

Todo

• when Wifi connected need to close the softAP.

frjaraur

Configuring nginx for SSL SNI vhosts

Gotchas

• Note that SHA2 hash algorithm may be not supported on older systems (Windows XP, Windows 2003, among others).
• Be aware that mandatory https on SNI vhosts eliminate [Internet Explorer on Windows XP, among others] (http://en.wikipedia.org/wiki/Server_Name_Indication#Web_browsers.5B6.5D).

Remarks

• My version of konklones SSL config does not have SPDY support(my nginx+openssl does not support it)
• You need a default ssl server (example.org-default.conf).
• Some SSL-options have to be unique across your instance, so it's easier to have them in a common file(ssl.conf).

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resource "digitalocean_droplet" "haproxy-www" {
    image = "ubuntu-14-04-x64"
    name = "haproxy-www"
    region = "nyc2"
    size = "512mb"
    private_networking = true
    ssh_keys = [
      "${var.ssh_fingerprint}"
    ]
  connection {

frjaraur

Ceph Cluster on One Node

Server Configurations

Host Specific Config

Ensure that "ceph" hostname's resolves to your IP

cat /etc/hosts
127.0.0.1	localhost

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MicroService Proxy Gateway Solutions

Kong, Traefik, Caddy, Linkerd, Fabio, Vulcand, and Netflix Zuul seem to be the most common in microservice proxy/gateway solutions. Kubernetes Ingress is often a simple Ngnix, which is difficult to separate the popularity from other things.

Github Star Trend:

This is just a picture of this link from Feb

frjaraur

# allow scripts to run
set-executionpolicy unrestricted -Force
Get-WindowsOptionalFeature -Online | where {$_.FeatureName -like "*Hyper*" -or $_.FeatureName -like "containers" } | Enable-WindowsOptionalFeature -Online -NoRestart
(new-object net.webclient).DownloadFile('https://download.docker.com/win/beta/InstallDocker.msi','docker.msi')
Start-Process 'docker.msi' /qn -Wait

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Docker Swarm with Macvlan, Consul and Autoscaling

TL;DR:

This will get you routable containers with IPs on your existing subnets, advertising to Consul. They will also be scalable and placed across a cluster of Swarm hosts. It's assumed that you are already running Consul, so if not, there are a ton of tutorials out there. It's also assumed you know how to install Docker and various Linux kernels.

Bonus: We add an autoscaling API called Orbiter (https://gianarb.it/blog/orbiter-the-swarm-autoscaler-moves).

I just want to run containers, like now, on my existing infrastructure and networks!

So you have an existing environment. You use Consul for service discovery. Life is good. Containers are now a thing and you want to work them in without having to worry about overlay networking or reverse proxies. You also don't want to add extra latency (as some naysayers could use it as fuel to kill your hopes and dreams). Lastly, you don't have a lot of time to invest in a complex orchestration tool, such a