khenidak

/*
** this code is undergoing major updates (and fixes), please stay tuned.
for more details check: http://henidak.com/2015/10/azure-service-fabric-multiple-communication-listeners-per-service/
*/

public enum ICommunicationListenerStatus
    {
        Closed,
        Opening,
        Opened,  

khenidak

// for more details please refer to: http://henidak.com/2015/10/on-train-rides-and-histograms/


/*
Typical Use
- Create a class (or use Click class) that sub-classes Click (if you need more than *.value)
- The implementation favors speed over memory (it will copy the tree everytime you do a calc using the Do method). 
// this keeps the clicks for 1 min, then remove anything older
        private Clicker<MyClickType> m_MinuteClicker = new Clicker>MyClickType>(TimeSpan.FromMinutes(1));
// this keeps the clicks for 1 hour, then remove anything older

khenidak

   var crypto = require('crypto');
 
 
  var algo = 'SHA256';
  var hashencoding = 'base64';
    
// the below is not checked for casing    
    var arStandardHeaders = ['content-encoding', 'content-language', 'content-length', 'content-md5', 'content-type', 
        'date', 'If-Modified-Since', 'If-Match', 'If-None-Match', 'If-unmodified-Since', 'range'];

khenidak

Create a nested development envrionment on Azure VM. I use this for kernel specific sandboxes/dev. Admittedly, This is following my own quirky dev env. So apprach this with care.

What will you have:

1. Separate virtual network for your sandbox
2. QEMU (kvm enabled) vms running using this network
3. Additional data disk aufs mounted for home directory (to move that disk to new vms if needed)

Steps

khenidak

#!/bin/bash
# What is this: it creates vxlan across two hosts
# does this need multicast on hosts: no, we are using the no learning approach
# How: we are using static popluation of fdb and arp database. (we don't use l2miss or l3miss - maybe we try it on a different script)
# What do i need:
#       two VMs running everywhere, as long as you can do udp between them.
#       modify host1/2 for host ips (your VMs)
#       modify ip1/ip2 and vip1/vip2 for your configuration.
#       the script connect to VMs via ssh. so make sure you have the keys handy
# what can i use it for: VMs/Containers/funky networking. get creative

khenidak

# simple linux tracepoint parser that converts
# /sys/kernel/debug/tracing/events/<sub sys>/<tracepoint>/format
# into a meaningful json object for further processing.

# each event is has subsystem, id, fields, fmt (original fmt in format file)
# each field has name, size, is_array, array_size, is_pointer
# stderr has max tracepoint record size, subsystem, name

# run with `python linux_tracepoint_parser.py | jq`

khenidak

#Sources: 
# https://stackoverflow.com/a/28938235

# Reset
Color_Off='\033[0m'       # Text Reset

# Regular Colors
Black='\033[0;30m'        # Black
Red='\033[0;31m'          # Red
Green='\033[0;32m'        # Green

khenidak

# on a debian system
# expects $1 as "<binary>:<package> <binary>:<package>"
# example "qemu-img:qemu-utils nslookup:dnsutils"
# if you are not sure which package has your binary
# use apt-file search <binary name>
# we don't handle error here. so make sure you are
# using the correct binary and package names in design time
ensure_tooling(){
    local req_tools=($1)
    for tool in "${req_tools[@]}"; do

khenidak

<network>
  <name>kernel-net</name>
  <uuid>5618453a-d6af-42f5-b77d-eb1727371b73</uuid>
  <forward mode='nat'>
    <nat>
      <port start='1024' end='65535'/>
    </nat>
  </forward>
  <bridge name='kerneldevbr0' stp='on' delay='0'/>
  <mac address='42:ef:c9:0b:a4:f1'/>

khenidak

don't do this at home!. This runs kernel 5.0.0 on Azure VM. The version itself is not certified yet to run on Azure.

Prep

Create VM on Azure follow https://docs.microsoft.com/en-us/azure/virtual-machines/linux/quick-create-cli

ssh to your new machine

Install prep req