Fleeting

This is a prototype of a tool to generate an ephemeral OpenShift installation image.

Testing

Put files to be populated by Ignition in the tree rooted at data/ignition/files/. Put systemd units in data/ignition/systemd/units. These are all built into the binary at compilation time.

The ZTP manifests provided by the users are read from ./manifests. The required manifests are:

• manifests/pull-secret.yaml
• manifests/cluster-deployment.yaml
• manifests/agent-cluster-install.yaml
• manifests/infraenv.yaml

As a starting point for testing, you can substitute your SSH public key and pull secret into the example manifests. Your pull secret JSON data can be obtained from the OpenShift Console.

Run the tool using go run cmd/main.go.

The output ISO is written to output/fleeting.iso.

Boot the ISO in a VM with at least 8192MiB of RAM. No storage is required. The assisted-service UI is available on port 8080.

Node0

To run the assisted service only on a pre-determined node a.k.a. node0, currently we have hardcoded a static IP 192.168.122.2. A systemd service named node-zero.service looks for the static IP and if the current node's IP matches with it then only the assisted-service.service systemd service is startred. The assisted-service.service is responsible for running the assisted service.

To set the static ip in libvirt:

1. Edit the default network

virsh net-edit default

2. Add dns and host mac for node0

<network>
  <name>default</name>
  <uuid>2467ce0f-aff2-4031-b0be-3e40fca96421</uuid>
  <forward mode='nat'/>
  <bridge name='virbr0' stp='on' delay='0'/>
  <mac address='52:54:00:bf:2b:d4'/>
  <dns>
    <host ip='192.168.122.2'>
      <hostname>node0</hostname>
    </host>
  </dns>
  <ip address='192.168.122.1' netmask='255.255.255.0'>
    <dhcp>
      <range start='192.168.122.2' end='192.168.122.254'/>
      <host mac='52:54:00:aa:aa:aa' ip='192.168.122.2'/>
    </dhcp>
  </ip>
</network>

3. Destroy and start network

sudo virsh net-destroy default
sudo virsh net-start default