EL8 Quickstart (Rocky Linux and RHEL)

Install Warewulf and dependencies

sudo dnf groupinstall "Development Tools"
sudo dnf install epel-release
sudo dnf install golang tftp-server dhcp-server nfs-utils

git clone https://github.com/hpcng/warewulf.git
cd warewulf
make all
sudo make install

Configure firewalld

Restart firewalld to register the added service file, add the service to the default zone, and reload.

sudo systemctl restart firewalld
sudo firewall-cmd --permanent --add-service warewulf
sudo firewall-cmd --permanent --add-service nfs
sudo firewall-cmd --permanent --add-service tftp
sudo firewall-cmd --reload

Configure the controller

Edit the file /etc/warewulf/warewulf.conf and ensure that you’ve set the appropriate configuration parameters. Here are some of the defaults for reference assuming that 192.168.200.1 is the IP address of your cluster’s private network interface:

ipaddr: 192.168.200.1
netmask: 255.255.255.0
warewulf:
  port: 9873
  secure: false
  update interval: 60
dhcp:
  enabled: true
  range start: 192.168.200.10
  range end: 192.168.200.99
  template: default
  systemd name: dhcpd
tftp:
  enabled: true
  tftproot: /var/lib/tftpboot
  systemd name: tftp
nfs:
  systemd name: nfs-server
  exports:
    - /home
    - /var/warewulf

The DHCP range ends at 192.168.200.99 and as you will see below, the first node static IP address (post boot) is configured to 192.168.200.100.

Start and enable the Warewulf service

# Start and enable the warewulfd service
sudo systemctl enable --now warewulfd

Configure system services automatically

There are a number of services and configurations that Warewulf relies on to operate. If you wish to configure all services, you can do so individually (omitting the --all) will print a help and usage instructions.

sudo wwctl configure --all

Note

If you just installed the system fresh and have SELinux enforcing, you may need to reboot the system at this stage to properly set the contexts of the TFTP contents. After rebooting, you might also need to run $ sudo restorecon -Rv /var/lib/tftpboot/ if there are errors with TFTP still.

Pull and build the VNFS container (including the kernel)

This will pull a basic VNFS container from Docker Hub and import the default running kernel from the controller node and set both in the “default” node profile.

sudo wwctl container import docker://warewulf/rocky:8 rocky-8

Set up the default node profile

Node configurations can be set via node profiles. Each node by default is configured to be part of the default node profile, so any changes you make to that profile will affect all nodes.

The following command will set the container we just imported above to the default node profile:

sudo wwctl profile set --yes --container rocky-8 "default"

Next we set some default networking configurations for the first ethernet device. On modern Linux distributions, the name of the device is not critical, as it will be setup according to the HW address. Because all nodes will share the netmask and gateway configuration, we can set them in the default profile as follows:

sudo wwctl profile set --yes --netdev eth0 --netmask 255.255.255.0 --gateway 192.168.200.1 "default"

Once those configurations have been set, you can view the changes by listing the profiles as follows:

sudo wwctl profile list -a

Add a node

Adding nodes can be done while setting configurations in one command. Here we are setting the IP address of eth0 and setting this node to be discoverable, which will then automatically have the HW address added to the configuration as the node boots.

Node names must be unique. If you have node groups and/or multiple clusters, designate them using dot notation.

Note that the full node configuration comes from both cascading profiles and node configurations which always supersede profile configurations.

sudo wwctl node add n0000.cluster --ipaddr 192.168.200.100 --discoverable

At this point you can view the basic configuration of this node by typing the following:

sudo wwctl node list -a n0000.cluster

Turn on your compute node and watch it boot!