================================
EL7 Quickstart (CentOS and RHEL)
================================

Install Warewulf and dependencies
=================================

.. code-block:: bash

   sudo yum install -y golang tftp-server dhcp nfs-utils

   git clone https://github.com/warewulf/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.

.. code-block:: bash

   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:

.. code-block:: yaml

    WW_INTERNAL: 43
    ipaddr: 192.168.200.1
    netmask: 255.255.255.0
    network: 192.168.200.0
    warewulf:
      port: 9873
      secure: false
      update interval: 60
      autobuild overlays: true
      host overlay: true
      syslog: false
    dhcp:
      enabled: true
      range start: 192.168.200.50
      range end: 192.168.200.99
      systemd name: dhcpd
    tftp:
      enabled: true
      systemd name: tftp
    nfs:
      enabled: true
      export paths:
      - path: /home
        export options: rw,sync
        mount options: defaults
        mount: true
      - path: /opt
        export options: ro,sync,no_root_squash
        mount options: defaults
        mount: false
      systemd name: nfs-server
    container mounts:
      - source: /etc/resolv.conf
        dest: /etc/resolv.conf
        readonly: true

.. note::

   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
=====================================

.. code-block:: bash

   # 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.

.. code-block:: bash

   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 ``restorecon -Rv /var/lib/tftpboot/`` if there are
   errors with TFTP still.

Pull and build the VNFS container and 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.

.. code-block:: bash

   sudo wwctl container import docker://ghcr.io/warewulf/warewulf-centos:7 centos-7 --setdefault
   sudo wwctl kernel import $(uname -r) --setdefault

Set up the default node profile
===============================

The ``--setdefault`` arguments above will automatically set those
entries in the default profile, but if you wanted to set them by hand
to something different, you can do the following:

.. code-block:: bash

   sudo wwctl profile set -y default -K $(uname -r) -C centos-7

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:

.. code-block:: bash

   sudo wwctl profile set -y default --netdev eth0 --netmask 255.255.255.0 --gateway 192.168.200.1
   sudo wwctl profile list

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.

.. code-block:: bash

   sudo wwctl node add n0000.cluster --ipaddr 192.168.200.100 --discoverable true
   sudo wwctl node list -a n0000

Turn on your compute node and watch it boot!