panda1100

Bootstrap: docker
From: rockylinux/rockylinux:latest
Stage: build

%post
    dnf -y group install "Development tools"
    dnf -y install epel-release
    dnf -y install 'dnf-command(config-manager)'
    dnf -y config-manager --set-enabled powertools
    dnf -y install wget

panda1100

# ---------------------------------*-sh-*------------------------------------
# Yoshiaki Senda modified version
#
# Copyright (C) 2021-2022 OpenCFD Ltd.
# SPDX-License-Identifier: (GPL-3.0+)
#
# Example
#     git clone https://develop.openfoam.com/packaging/containers.git
#     cd containers/docker
#     wget https://gist.githubusercontent.com/panda1100/5ee809e39e9f50c5c12a85c582e4c517/raw/openfoam2212-pmi2_rocky.def

panda1100

Vagrant.configure("2")  do |config|
  number_of_node = ENV["NODES"] || 2

  config.vm.define :server do |server|
    server.vm.box = "rockylinux/8"
    server.vm.box_version = "5.0.0"
    server.vm.hostname = "httpsboot-srv"

    server.vm.network "private_network",
      ip: "10.0.0.254",

panda1100

How to build a load balancer with BGP and ECMP using VyOS

According to this cloudflare blog article "Load Balancing without Load Balancers", we can build a rock-solid load balancer only using a router. All the magic comes from BGP and Equal-Cost Multi-Path routing.

In this howto, I will use bird as BGP router on linux instance (ie. servers).

Test environment

I use GNS3 with this architecture :

panda1100

Vagrant.configure("2")  do |config|

  config.vm.define :server do |server|
    server.vm.box = "rockylinux/8"
    server.vm.box_version = "4.0.0"
    server.vm.hostname = "warewulf-server"

    server.vm.network "private_network",
      ip: "10.0.0.254",
      netmask: "255.255.252.0",

panda1100

Vagrant.configure("2")  do |config|
  number_of_node = 2

  config.vm.define :server do |server|
    server.vm.box = "rockylinux/8"
    server.vm.box_version = "4.0.0"
    server.vm.hostname = "warewulf-server"

    server.vm.network "private_network",
      ip: "10.0.0.254",

panda1100

LS-Dyna setup with AWS ParallelCluster

Step 1: Setup No-Tears-Cluster

1. Click to launch a stack in your region:

Region	Launch
North Virginia (us-east-1)	[](https://us-east-1.console.aws.amazon.com/cloudformation/home?region=us-east-1#/stacks/create/review?stackName=AWS-

panda1100

package main

// @lizrice, mostly copied from @doctor_julz: https://gist.github.com/julz/c0017fa7a40de0543001

import (
	"fmt"
	"os"
	"os/exec"
	"syscall"
)

panda1100

#!/bin/bash

# You need to install overlayroot
# sudo apt-get install overlayroot

LANG=C

set -e
set -x

panda1100

#!/bin/bash
docker run --rm -v `pwd`:/root/files --name $1 -it ubuntu:16.04 /bin/bash