Skip to main content

Development Environment (KVM)

  1. Create CentOS 7 development virtual machine under KVM
# KVM is running on server called master1 which is not my desktop
ssh -X master1
# On master1 server
wget -P /global/downloads/centos http://mirror.mobap.edu/centos/7.8.2003/isos/x86_64/CentOS-7-x86_64-Everything-2003.iso
qemu-img create -o preallocation=metadata -f qcow2 /global/images/centos-7.qcow2 32G
# install wwdev Centos 7 development VM
sudo virt-install --virt-type kvm --name centos7-wwdev --ram 8192 \
--disk /global/images/centos-7.qcow2,format=qcow2 \
--network network=default \
--graphics vnc,listen=0.0.0.0 --noautoconsole \
--os-type=linux --os-variant=rhel7.0 \
--location=/global/downloads/centos/CentOS-7-x86_64-Everything-2003.iso
# Complete installation using virt-manager
# To start virt-manager on non-local server
ssh -X master1
sudo -E virt-manager
# Login to VM and install @development group and go language
ssh root@wwdev
# Disable selinux by modifying /etc/sysconfig/selinux
vi /etc/sysconfig/selinux
SELINUX=disabled
# disable firewall
systemctl stop firewalld
systemctl disable firewalld
  1. Turn off default network dhcp on server master1
# shutdown all VMs
sudo virsh net-destroy default
sudo virsh net-edit default
# remove dhcp lines from XML
sudo virsh net-start default
  1. Build and install warewulf on wwdev
ssh wwdev
# Fedora prerequisites
sudo dnf -y install tftp-server tftp
sudo dnf -y install dhcp
sudo dnf -y install ipmitool
sudo dnf install singularity
sudo dnf install gpgme-devel
sudo dnf install libassuan.x86_64 libassuan-devel.x86_64
sudo dnf golang
sudo dnf nfs-utils
# Centos prerequisites
sudo yum -y install tftp-server tftp
sudo yum -y install dhcp
sudo yum -y install ipmitool
sudo yum install http://repo.ctrliq.com/packages/rhel7/ctrl-release.rpm
sudo yum install singularityplus
sudo yum install gpgme-devel
sudo yum install libassuan.x86_64 libassuan-devel.x86_64
sudo yum install https://packages.endpoint.com/rhel/7/os/x86_64/endpoint-repo-1.7-1.x86_64.rpm
sudo yum install golang
sudo yum install nfs-utils
# Install Warewulf and dependencies
git clone https://github.com/hpcng/warewulf.git
cd warewulf
make all
sudo make install
# Configure the controller
Edit the file /etc/warewulf/warewulf.conf and ensure that you've ser the approprite configuration parameters
# Configure system service automatically
sudo wwctl configure dhcp # Create the default dhcpd.conf file and start/enable service
sudo wwctl configure tftp # Install the base tftp/PXE boot files and start/enable service
sudo wwctl configure nfs # Configure the exports and create an fstab in the default system overlay
sudo wwctl configure ssh # Build the basic ssh keys to be included by the default system overlay
# Pull and build the VNFS container and kernel
sudo wwctl container import docker://warewulf/centos-8 centos-8 --setdefault
sudo wwctl kernel import build $(uname -r) --setdefault
# Set up the default node profile
sudo wwctl profile set default -K $(uname -r) -C centos-7
sudo wwctl profile set default --netdev eth0 -M WW_server_subnet_mask -G WW_server_ip
sudo wwctl profile list
# Add a node and build node specific overlays
sudo wwctl node add n0000.cluster --netdev eth0 -I n0000_ip --discoverable
sudo wwctl node list -a n0000
# Review Warewulf overlays
sudo wwctl overlay list -l
sudo wwctl overlay list -ls
sudo wwctl overlay edit default /etc/hello_world.ww
sudo wwctl overlay build -a
# Start the Warewulf daemon
sudo wwctl ready
sudo wwctl server start
sudo wwctl server status
  1. Boot your node and watch the console and the output of the Warewulfd process