How to Create Cluster 7 (Ubuntu 20.04)

Introduction

Here are the instructions on how to build Cluster 7 using Ubuntu 20.04.

The build is not complete as of October 19, 2021.

Hardware Requirements (so far)

• 2 x 1 gigabit unmanaged switches

• one switch for private IP
• one switch for public IP

• 4 x unused ProLiant DL160 G5 Machines

• one for NAT machine
• one for Foreman Server
• one for LDAP Server
• one extra for any testing

• 1 x USB for Operating System (OS)

Create a Network Address Translation(NAT) machine

A NAT machine will act as a local VPN to the cluster. This will be the first machine you SSH into.

Here are the instructions:

1. Install Ubuntu 20.04 using USB. You can skip everything and leave everything default.
2. Create a DNS entry for this machine in the website below to give you a public IP address
   • https://www.cgl.ucsf.edu/cgi-bin/secure/dns_dhcp_registration.py?action=view_zone&name=compbio.ucsf.edu
   • You need the MAC Address of an ethernet interface
3. Configure private and public network interfaces
   • vim /etc/netplan/00-installer-config.yaml
   • Configuration should look like this:

   # This is the network config written by 'subiquity'

   network:

   ethernets:

   enp3s0:

   addresses:

   - 10.70.1.2/16

   gateway4: 127.0.0.1

   nameservers:

   addresses:

   - 10.70.1.1

   search:

   - dot

   enp4s0:

   addresses:

   - 169.230.26.58/16

   gateway4: 169.230.26.1

   nameservers:

   addresses:

   - 8.8.8.8

   - 8.8.4.4

   - 128.218.254.10

   - 128.218.254.40

   search:

   - dot

   - compbio.ucsf.edu

   version: 2