bugbiteme / ocp-virt

Openshift Virtualization Demo running Elasticsearch on mixed nodes (vm and containers)

Openshift Virtualization Demo running Elasticsearch on Mixed Pods (VMs and Containers)

Dependencies:

• OpenShift Baremetal cluster with ODF
  • for instance: demo.redhat.com - Hands on with Openshift Virtualization
  • ODF is default storage class set and profile applied
• Installed Operators
  • OpenShift Virtualization Operator
  • Cert Utils Operator
• RHEL Subscription Activation Keys (for Pod software installation)
  • Subscription Org
  • Subscription Key

Setup

NOTE: Setup is ran from the desired bastion host for the OCP cluster(s)

sudo dnf install -y git
git clone https://github.com/purefield/opc-virt.git ~/demo
cd ~/demo/
./setup.sh

Demo Prep

Log into the OpenShift Cluster

Run the demo script from the same bastion to create a fresh elasticsearch cluster in a new namespace (first argument or prompt, defaults to last namespace used or next-gen-virt)

cd elasticsearch/
./generate-yaml.sh next-gen-virt
oc apply -f next-gen-virt.yaml

Wait for installation (approximately 4 mins in normal circumstances)

Once the VMs are running, execute:

watch --color ./demo.sh

Demo Highlights

Under Administrator Perspective:

• Operators -> OperatorHub
  • OpenShift Virtualization Operator (installed)
  • Migration Toolkit for Virtualization Operator (available)
• Virtualization
  • Overview
  • Templates
  • DataStore (RWX)
  • Catalog
  • VirtualMachines
    • Create
      • With Wizard
        • Create
          • Select Red Hat Enterprise Linux 9.0 VM
          • Next
            • Create virtual machine
    • [... menu] Migrate Node to Node
    • [New VM] Overview
      • Virtual Machine options
      • Metrics
      • Snapshots
• Run demo steps
  • Pick random/suggested name for namespace to pass as first argument or when prompted
  • Execute generate and apply steps in shared terminal window showing VirtualMachines screen in the background

Under the Developer Perspective:

• Topology
  • Show the mixed environment and dig into details
    • 3 Elasticsearch VMs for data and control plane
    • 1 Elasticsearch container as coordinator node
    • 1 Kibana container for data visualization
    • 1 RHEL 9 container for data generation
    • 1 RHEL 9 container for utilities to explore with ssh keys to the VMs

Under Administrator Perspective:

• Networking
  • Routes
    • Select es-master00 Cockpit route
      • Log-in using elasticsearch:redhat
        • View services and search for elasticsearch (will appear when ready)
    • Select elasticsearch route
      • Verify cluster_uuid is populated
      • Append /_cat/nodes to elasticsearch url and verify coordinate is a member
    • Open kibana route to show connected web application
      • In Kibana create a new discovery for the "generated" index with timestamp
• Virtualization
  • VirtualMachines
    • es-master00
      • Environment
        • Configuration Maps mounted inside the VM
          • 00yaml - Elasticsearch Node specific configuration
          • 0000sh - Multiple scripts used during VM installation
        • Secret mounted inside the VM
          • 00cert - Let's Encrypt SSL Certificate private key and chain used by the VMs
    • Migrate VM from Node to Node
    • Take a Snapshot of the VM