wido

"""
Generate a DNSSEC DS record based on the incoming DNSKEY record

The DNSKEY can be found using for example 'dig':

$ dig DNSKEY secure.widodh.nl

The output can then be parsed with the following code to generate a DS record
for in the parent DNS zone

wido

#!/usr/bin/env bash
#
# Use BGP+EVPN for VXLAN with CloudStack instead of Multicast
#
# Place this file on all KVM hypervisors at /usr/share/modifyvxlan.sh
#
# More information about BGP and EVPN with FRR: https://vincent.bernat.ch/en/blog/2017-vxlan-bgp-evpn
#

DSTPORT=4789

wido

#!/bin/bash
#
# Create a 8GB eMMC image for Tesla Model S/X MCU1
#
# Example usage: ./mkteslaemmcimg.sh ./vinXXXXX.img ./develop-2019.20.2.1-16-5659e07dfd.img
#
set -e

FIRMWARE=$2
IMAGE=$1

wido

#!/bin/bash
#
# Put Tesla MCU1 in factory mode
#
# Call over diagnostics port with seceth enabled
#
# Reboot MCU afterwards
#

VALUE=true

wido

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

    server_name localhost;

    client_max_body_size 0;

    proxy_buffering off;
    proxy_set_header Host $host;

wido

#!/bin/bash
#
# Author: Wido den Hollander <wido@widodh.nl>
#
# Proxy all TCP and UDP IPv4 traffic from 192.168.100.230 to 10.0.100.50
#
# This can be used as a (temporary) proxy when you want to renumber a machine and want
# to make sure it's still available on it's old address
#

wido

#!/bin/bash
# For each running OSD query the BlueStore DB size and entries and calculate avg size per entry
#
# Author: Wido den Hollander <wido@widodh.nl>
#

for OSD_ID in $(find /var/run/ceph -name 'ceph-osd.*.asok' -type s -printf "%f\n"|cut -d '.' -f 2); do
    DB_USED_BYTES=$(ceph daemon osd.$OSD_ID perf dump|jq '.bluefs.db_used_bytes')
    BLUESTORE_ONODES=$(ceph daemon osd.$OSD_ID perf dump|jq '.bluestore.bluestore_onodes')
    echo "osd.$OSD_ID: db_used_bytes=$DB_USED_BYTES bluestore_onodes=$BLUESTORE_ONODES db_entry_size=$(($DB_USED_BYTES / BLUESTORE_ONODES))"

wido

# udev rule to set disk schedulers for Ceph
# For spinning disks we want the CFQ scheduler so that we can set
# priorities on client and recovery I/O threads
#
# Author: Wido den Hollander <wido@42on.com>
# Date: July 2015

# Use deadline for SSDs
ACTION=="add|change", KERNEL=="sd[a-z]*", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="deadline"

wido

#!/bin/bash
#
# Simple script to change lights on Philips Hue using cURL
#
# Source: http://hkionline.net/posts/using-phillips-hue-from-the-command-line
#
# Author: Wido den Hollander <wido@denhollander.io>
#

# YES! Philips Hue also talks IPv6! :-)

wido

#!/usr/bin/env python3
"""
Generate a random IPv6 address for a specified subnet
"""

from random import seed, getrandbits
from ipaddress import IPv6Network, IPv6Address

subnet = '2001:db8:100::/64'