virtual-baremetal-sno-host-prep

What is virtual-baremetal-sno-host-prep?

This tool will set up VM hosts for baremetal SNO tests. The following software will be installed to support VMs:

• libvirt: creating VMs
• sushy-tools: setup BMC

All SNOs will uses the same IP network, and one of the network interface on a VM host will be set as a bridge for VMs.

Each VM created will have BMC support.

Getting started

Step 1: Setup VM Hosts

1. Create all.yml:

cp vars/all.sample.yml vars/all.yml

2. Fill in all.yml according to the comments.

3. Create a inventory file. All hosts should be ssh accessible:

cat << EOF > inventory
[bastion]
host-name-of-bastion

[vmhosts]
host-name-of-vm-hosts-01 network1_nic=ens1f0 offset=0 enable_disk2=true disk2_device=/dev/nvme0n1 num_vm_disk2=10 num_vm_hdd=5
host-name-of-vm-hosts-02 network1_nic=ens1f0 offset=1 enable_disk2=false num_vm_disk2=7 num_vm_hdd=5
host-name-of-vm-hosts-03 network1_nic=ens1f0 offset=2 enable_disk2=true disk2_device=/dev/sdb num_vm_disk2=5 num_vm_hdd=5
host-name-of-vm-hosts-01 network1_nic=ens1f0 offset=3 enable_disk2=true disk2_device=/dev/sdc num_vm_disk2=10 num_vm_hdd=5
EOF

Offset will be used to generate a public IP of the vmhost. (offset + public_ip_network_node_start) If enable_disk2 is set to true, will setup disk2 disks on the vmhost, and will use disk2_device for the disk2 disks. The disk2_device will be partitioned and formatted. num_vm_disk2 & num_vm_hdd will be the number of vms we will generate when running the 02-create-many-vms playbook.

If using RH scale lab, you can also use the generate_inventory script to scan all vms and generate.

3. Run the following command to setup vmhost:

ansible-playbook -i inventory ansible/01-setup-test-nodes.yml

Note: the public IP address will be used for VMs and SNOs, and they can be internal private IPs.

Step 2: Create many vms at once

This is a step just generate vms. It will NOT create any cluster resources on hub, and it will NOT install SNOs on the vm.

This will generate a vms-inventory.csv file with all useful inofrmation for other scripts to pickup and create SNO resources. The file will be stored on bastion in hub_config_dir which set in the all.yml, and it will be using the following format:

cluster_name,domain_name,mac_addr,ip,prefix,gateway,machine_cidr,dns_resolver,bmc_addr,bmc_username,bmc_password

1. make sure you have num_vm_disk2 and num_vm_hdd set properly in the inventory file
2. Run the following command to create SNOs

ansible-playbook -i inventory ansible/02-create-many-vms.yml

Note: if using the same invetory settings, modify num_vm_disk2 & num_vm_hdd and re-run the script won't affect any previously created vms (they won't be deleted), and final vms-inventory.csv ip address mapping may be updated globally, but each vm's mac address will stay the same. Note: you can use -f 30 to increase concurrency of the task if you have a lot of vm hosts.

Step 3: Cleanup many vms at once

Run the following command will cleanup the vms created in the previous steps:

ansible-playbook -i inventory ansible/03-cleanup-many-vms.yml

Note: you can use -f 30 to increase concurrency of the task if you have a lot of vm hosts.