Skip to content

Instantly share code, notes, and snippets.

@dbathgate
dbathgate / vpc-ip-address-to-container-amazon.sh
Last active July 7, 2022 14:13
Assign VPC addresses to Docker containers associated as secondary IP addresses to an ENI in AWS
# Description: How to assign VPC addresses to Docker containers associated as secondary IP addresses to an ENI in AWS
# Operating System: Amazon Linux AMI 2016.09.1 (HVM)
# Prerequisites:
# - Assign N number of secondary IP addresses to network interface on Docker host
# - Each new container requires additional assignment of secondary IP addresses
# - Containers can be launched with --net=none to avoid adding a Docker networked NIC (docker run --net=none -d imageId)
# Credit to https://github.com/jpetazzo/pipework for steps on linking IP address
################# Setup Bridge of eth0 ######################
yum install bridge-utils -y
@fntlnz
fntlnz / self-signed-certificate-with-custom-ca.md
Last active June 1, 2025 11:43
Self Signed Certificate with Custom Root CA

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096
@anhldbk
anhldbk / README.md
Last active February 27, 2025 07:18
TLS client & server in NodeJS

1. Overview

This is an example of using module tls in NodeJS to create a client securely connecting to a TLS server.

It is a modified version from documentation about TLS, in which:

  • The server is a simple echo one. Clients connect to it, get the same thing back if they send anything to the server.
  • The server is a TLS-based server.
  • Clients somehow get the server's public key and use it to work securely with the server

2. Preparation

@trungv0
trungv0 / haproxy.sh
Last active March 19, 2025 15:42
RabbitMQ cluster with HAProxy & Keepalived for high availability
# install haproxy
yum install -y haproxy
# config haproxy for rabbitmq
cat > /etc/haproxy/haproxy.cfg << "EOF"
global
log 127.0.0.1 local0 notice
maxconn 10000
user haproxy

Docker Macvlan and Ipvlan Experimental Driver Examples

  • The build will be vendored into github.com/docker/docker in the next few days. In the meantime here is the binary that will be getting vendored. docker-1.11.0-dev.zip
  • Ipvlan L2 mode network with multiple subnets without a parent specified
  • For a long test that will create 54 networks and 120+ containers, then delete them all and recreate them again try ipvlan-macvlan-it.sh Instructions here Docker Macvlan and Ipvlan Manual IT Test
  • FYI Note: When the parent is empty or the --internal flag is used, a linux type dummy interface is dynamically created by Libnetwork to act as the parent. This network is completely isolated and is the equivalent to a --internal flag. This is a good mode for demoing.
  • The first test requires an interface
@maxclaus
maxclaus / curl-get-status-code-and-response-body.sh
Created November 24, 2015 17:52
Curl - Get status code and response body
URL="http://stackoverflow.com/"
# store the whole response with the status at the and
HTTP_RESPONSE=$(curl --silent --write-out "HTTPSTATUS:%{http_code}" -X POST $URL)
# extract the body
HTTP_BODY=$(echo $HTTP_RESPONSE | sed -e 's/HTTPSTATUS\:.*//g')
# extract the status
HTTP_STATUS=$(echo $HTTP_RESPONSE | tr -d '\n' | sed -e 's/.*HTTPSTATUS://')
@remojansen
remojansen / class_decorator.ts
Last active September 14, 2023 14:54
TypeScript Decorators Examples
function logClass(target: any) {
// save a reference to the original constructor
var original = target;
// a utility function to generate instances of a class
function construct(constructor, args) {
var c : any = function () {
return constructor.apply(this, args);
}
@ygotthilf
ygotthilf / jwtRS256.sh
Last active May 27, 2025 16:39
How to generate JWT RS256 key
ssh-keygen -t rsa -b 4096 -m PEM -f jwtRS256.key
# Don't add passphrase
openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
cat jwtRS256.key
cat jwtRS256.key.pub
@yowu
yowu / HttpProxy.go
Last active March 26, 2025 05:23
A simple HTTP proxy by Golang
package main
import (
"flag"
"io"
"log"
"net"
"net/http"
"strings"
)
@iamralch
iamralch / sshtunnel.go
Last active August 21, 2024 05:15
SSH tunnelling in Golang
package main
import (
"log"
"bufio"
"time"
"os"
"fmt"
"io"
"net"