robbisg / hpc101

This is a how-to guide to install stuff for HPC (or not) on Ubuntu

hpc101

This is a how-to guide to install stuff for HPC on virtual boxes mounting Ubuntu 18.04

Preliminary operations

Install Ubuntu 18.04 on a single virtual machine, I enabled two network interfaces on Virtual box on both nodes, but on master node I used a bridged connection so that the VM is in the network of the host computer and thus accessible via ssh, while a NAT connection can be used for the node(s). The second interface is for the internal network.

The node machine can be cloned starting from the master, be careful to use a different MAC address when cloning the master.

After cloning the machine

The cloned machine now has the same hostname and the same network settings of the master machine, so we need to change the hostname by typing sudo hostnamectl set-hostname node01.
Then we need to enter sudo nano /etc/cloud/cloud.cfg and to add preserve_hostname: true (or changing it).

Finally, we need to modify network settings.

Typing sudo nano /etc/netplan/50-cloud-init.yaml we are able to edit the configuration.

My configuration file looks like this.

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        enp0s3:
            addresses: []
            dhcp4: true
        enp0s08:
            addresses: [192.168.100.101/24]
            dchp4: no
    version: 2

Obvioulsy you can change the addresses of your nodes as you like.
Then type sudo netplan apply to apply your edits (type ifconfig to validate them).

Editing the file /etc/hosts is not mandatory, it can be useful to let the nodes be accessible by their name rather than their IPs.

Now you can setup Kubernetes, Slurm.