125 lines
4.1 KiB
Markdown
125 lines
4.1 KiB
Markdown
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# warewulf v4 WIP
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This is built on CentOS-7/8. More needs to be done to make it work on other
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distributions and versions specifically with the system service
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components.
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In a nutshell, to install and start provisioning nodes, do the following:
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####Build Warewulf and dependencies:
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Warewulf is programmed in GoLang, so you will need to also install a Go compiler
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on your system. The easiest way to do this on RHEL and CentOS is by using the Go
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packages that are included in EPEL. In addition there are some dependencies that
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Warewulf will reuire to operate properly and because this is a quick HOWTO, we
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disable the firewall so any provisioning issues we have won't be caused by
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packets being dropped.
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To install these and compile Warewulf, do the following:
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```
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sudo yum install epel-release
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sudo yum install golang tftp-server dhcp
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sudo systemctl stop firewalld
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sudo systemctl disable firewalld
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make all
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```
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#### Install Warewulf onto your host system:
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The following command will install some of the Warewulf shared components into your
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host system. The locations of these paths and files are not yet configurable, so
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it can't be installed anywhere else.
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The default install locations are:
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* `/var/warewulf`: State data
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* `/etc/warewulf`: Configuration data
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```
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sudo make install
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```
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#### Configure the controller:
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Edit the file `/etc/warewulf/warewulf.conf` and ensure that you've set the
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appropriate configuration paramaters. Here are some of the defaults for reference:
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```
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ipaddr: 192.168.1.1
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netmask: 255.255.255.0
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warewulf:
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port: 9873
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secure: true
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dhcp:
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enabled: true
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range start: 192.168.1.150
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range end: 192.168.1.200
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template: default
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```
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Once it has been configured, you can have Warewulf configure the services:
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```
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sudo ./wwctl service dhcp -c
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# sudo ./wwctl service tftp -c
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```
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#### Use the controller's kernel and default VNFS into your "default" node profile:
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Next we are going to start configuring Warewulf. Use the following two commands to
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set the kernel and VNFS for the "default" profile which all nodes will utilize, and
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then configure node specific information as you add a new node to the configuration:
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```
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sudo ./wwctl profile set default -K $(uname -r) -V docker://warewulf/centos-8
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sudo ./wwctl node add n0000.cluster --netdev eth0 -I 192.168.1.100 -M 255.255.255.0 -G 192.168.1.1 -H 00:0c:29:23:8b:48
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```
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#### Build the kernel, VNFS, and overlays:
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Once you have added the node, you can start building the needed bootable components.
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There are three major groups of data to provision:
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1. Kernel: This is the boot kernel and driver overlay pair. The `wwctl kernel build`
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command will create these files. The `-a` option will scan your configuration looking
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for all needed kernel images and then go through and build them all. The caveat is
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that all these kernels must be installed to your host controller node.
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1. VNFS: The "VNFS" is the "Virtual Node File System", and that is the template that
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nodes will be provisioned to boot into. Warewulf v4 can support standard "chroot"
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style VNFS formats (e.g. same as Warewulf 3 and/or Singularity Sandboxes) as well as
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OCI (Open Container Initiative) formats which include Docker containers and containers
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in Docker Hub. As you can see in the above `wwctl profile set` command, we configured
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the VNFS to be a container hosted in Docker Hub. This can also be a local path or a
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container in a `docker-daemon`.
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1. Overlays: There are two types of overlays, "system" and "runtime". The difference is
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that the system overlay is provisioned before `/sbin/init` is called and the runtime
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overlay is provisioned after `/sbin/init` is called and is done from the booted operating
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system at periodic intervals (the time of this writing, it is ever 30 seconds).
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```
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sudo ./wwctl kernel build -a
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sudo ./wwctl vnfs build -a
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sudo ./wwctl overlay build -sa
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```
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#### Start the Warewulf daemon:
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Once the above provisioning images are built, you can check the provisioning "rediness"
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and then begin booting nodes.
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```
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sudo ./wwctl ready
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./warewulfd
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```
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#### Boot your compute node and watch it boot
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