iamjenechka

• 0.1. References
• 0.2. Other cheatsheets
• 0.3. Manage multiple gcloud config configurations
  • 0.3.1. Switch gcloud context with gcloud config
• 0.4. Credentials
• 0.5. info
• 0.6. projects
• 0.7. zones & regions
• 0.8. Organization
• 0.9. billing

iamjenechka

Managing OpenStack instances with Ansible through an SSH bastion host

I'm be using DreamCompute as my OpenStack provider, but there are dozens to choose from. I assume you already have Ansible and the OpenStack CLI tools installed.

Motivation

With the proliferation of OpenStack public clouds offering free and intro tiers, it's becoming very easy to effectively run a simple application for free or nearly free. Also with the emergence of Ansible, you don't need to learn and deploy complicated tools to do configuration management.

iamjenechka

# ------------------------------------------------
# Config files are located in /etc/wireguard/wg0
# ------------------------------------------------

# ---------- Server Config ----------
[Interface]
Address = 10.10.0.1/24 # IPV4 CIDR 
Address = fd86:ea04:1111::1/64 # IPV6 CIDR 
PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE; ip6tables -A FORWARD -i wg0 -j ACCEPT; ip6tables -t nat -A POSTROUTING -o eth0 -j MASQUERADE # Add forwarding when VPN is started
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE; ip6tables -D FORWARD -i wg0 -j ACCEPT; ip6tables -t nat -D POSTROUTING -o eth0 -j MASQUERADE # Remove forwarding when VPN is shutdown

iamjenechka

// Implement Pic. It should return a slice of length dy, each element of which is 
// a slice of dx 8-bit unsigned integers. When you run the program, it will display your picture, 
// interpreting the integers as grayscale (well, bluescale) values.
//
// The choice of image is up to you. Interesting functions include (x+y)/2, x*y, and x^y.
//
// (You need to use a loop to allocate each []uint8 inside the [][]uint8.)
//
// (Use uint8(intValue) to convert between types.)
package main

iamjenechka

Setting up docker to run in a PRIVILEGED LXC container

Set up a privileged container

Create container

Let's call the container docker_test1.

$ sudo lxc-create -t download -n docker_test1
...
Follow the prompts on the screen to set up the new container.

iamjenechka

# Zathura configuration file
# See man `man zathurarc'

# Open document in fit-width mode by default
set adjust-open "best-fit"

# One page per row by default
set pages-per-row 1

#stop at page boundries