jeromer

# LICENSE: public domain

def calculate_initial_compass_bearing(pointA, pointB):
    """
    Calculates the bearing between two points.

    The formulae used is the following:
        θ = atan2(sin(Δlong).cos(lat2),
                  cos(lat1).sin(lat2) − sin(lat1).cos(lat2).cos(Δlong))

shamil

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8

hsiboy

/*
                      d8888  .d8888b.  888b    888             
                     d88888 d88P  Y88b 8888b   888             
                    d88P888 888    888 88888b  888             
      .d8888b      d88P 888 888        888Y88b 888             
      88K         d88P  888 888        888 Y88b888             
      "Y8888b.   d88P   888 888    888 888  Y88888             
           X88  d8888888888 Y88b  d88P 888   Y8888             
       88888P' d88P     888  "Y8888P"  888    Y888             
                                                               

kizbitz

#!/usr/bin/env bash

# Installs/Configures:
#  - Docker
#  - Docker Registy Container with self-signed cert
#
# Tested on Ubuntu 14.04.1

# Must be executed with elevated privilages
if [ "$(id -u)" != "0" ]; then

aroragagan

#!/bin/bash
##################################################################################
#   Author: Gagandeep Arora
#   Date: 01-Oct-2014
# Purpose: To sync the rbds using incremenatl snapshots from production ceph cluster
# 	   	   to backup ceph cluster
##################################################################################
mirrorPool() { 
    #list all images in the pool
    IMAGES=`$SOURCERBDCMD ls $SOURCEPOOL` 

SmartFinn

OpenVPN Server and certificate management on MikroTik

Contents

• Setup OpenVPN server and generate certificates
• Add a new user
• Setup OpenVPN client
• Decrypt private key to avoid password asking (optional)
• Delete a user and revoke his certificate
• Revert OpenVPN server configuration on MikroTik

RafPe

Server 2 sockets,6 cores each, 2.4ghz

# Set ixgbe options
# Limit RSS queues to the number of physical cores per cpu
# Disable offload
# When you change this, you need to run the command and reboot for it to take.
echo "options ixgbe LRO=0,0 MQ=1,1 RSS=6,6 VMDQ=0,0 vxlan_rx=0,0" > /etc/modprobe.d/ixgbe.conf

# Shut down HT cores
for i in $(seq 1 2 23); do

tamurray

#!/usr/bin/python

import os
import sys
import time
from pprint import pprint
from concurrent import futures
from keystoneclient.v2_0 import client as ks_client
from novaclient import client as nova_client
from neutronclient.neutron import client as neutron_client

claudiok

Consumer-grade GPUs in an OpenStack system (NVIDIA GPUs)

Assumptions

This assumes you have GTX980 cards in your system (PCI id 10de:13c0 & 10de:0fbb per card). Just add more IDs for other cards in order to make this more generic. This also assumes nova uses qemu-kvm as the virtualization hypervisor (qemu-system-x86_64). This seems to be the default on OpenStack Newton when installed using openstack-ansible.

We assume OpenStack Newton is pre-installed and that we are working on a Nova compute node. This has been tested on an Ubuntu 16.04 system where I installed OpenStack AIO version 14.0.0 (different from the git tag used in the instructions!): http://docs.openstack.org/developer/openstack-ansible/developer-docs/quickstart-aio.html

Prepare the system for GPU passthrough (set up IOMMU/vfio/...)

Note: This is heavily based on information from https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#Enabling_IOMMU adapted for Ubuntu 16.04

mdonkers

#!/usr/bin/env python3
"""
License: MIT License
Copyright (c) 2023 Miel Donkers

Very simple HTTP server in python for logging requests
Usage::
    ./server.py [<port>]
"""
from http.server import BaseHTTPRequestHandler, HTTPServer