Redfish development tools - Virtual Redfish BMC

Redfish Simulation Emulator

After reviewing a few Redfish simulation tools, our choice, moving forward, was a tool called sushy-tools developed by the Openstack community. This tool simulates the Redfish protocols and provides the development community with independent access and testing of the Redfish protocol implementations. This tool is actively being enhanced and provides support for uefi boot. As such, one may encounter temporary hiccups with the code if one tries to use the latest code, thus we provide the git commit sha1 for the code we tested in the prerequisites sections that follow.

About Sushy-Tools

The sushy-tools tool set includes two emulators - static and dynamic. We have chosen to use the dynamic emulator as we want to use the libvirt backend to mimic baremetal nodes behind sushy-emulator (Redfish BMC). The sushy-emulator command-line tool contains functionality that is similar to the Virtual BMC tool except it uses the Redfish frontend protocols rather than IPMI. Refer to the diagram in the sushy-tools.png file which accompanies this documentation for an illustration of the toolset.

The sushy-emulator provides many Redfish resources that help the developers kickstart their efforts. These include:

  • Systems Resource

  • Managers Resource

  • Indicators Resource

  • Virtual Media Resource

Host Node Installation

The host node needs to have the operating system installed along with some additional tools. This section provides instructions for preparing Ubuntu hosted on Bare Metal as well as describing some of the prerequisites and tested software and hardware components.

Installation Prerequisites

Before we begin the installation there are a few prerequisites that should be considered, such as:

  • Are you installing the sushy-tools directly on an existing node or host or hosting the tool inside a virtual machine or instance?

  • While it is possible to host the tools on Windows, our assumption and favored choice was to install on a Linux with qemu/libvirtd support.

  • Hardware is a matter of choice as longs as the hardware supports virtual systems.

Tested Hardware and Software

For our development purposes and based on what was available to us at the time, we selected and tested the following hardware and software.

Tested Hardware

Dell R640 PowerEdge servers with the following accessories:

  • Dual Intel Xeon 6126 2.6GHz CPUs

  • 192GB - 2666Mhz RAM

  • 800GB RAID10 storage

  • 10GB bonded Intel NIC

However, we believe the minimum/functional requirements are much more relaxed.

An x86 hardware server/laptop with:

  • around 6 vCPUs available

  • 8GB RAM, for creating the emulator VM as well as the target VM

  • 200GB storage, for creating root disks for the VMs

  • optional to have a NIC, since VM-VM communication will be based on SW bridges

Tested Base Operating System

  • Ubuntu 18.04

  • Default server installation

  • Other APT packages installed included: net-tools, zip, unzip, git, qemu, and libvirtd with dependencies

Ubuntu 18.04 Hosted on Bare Metal

OS installation

Installation of Ubuntu 18.04 be done either using an ISO image mounted via virtual media or physical media, adjust according to your host hardware.

Once you have the operating system installed, the following instructions should be followed to install the requisite packages for the Redfish emulator, the Redfish emulator itself and the backend virtual node.

Installation of requisite APT packages

sudo apt update -y
sudo apt install -y git python3-setuptools qemu-kvm libvirt-bin virtinst \
python3-flask python3-requests nginx libvirt-daemon virt-manager libvirt \
libvirt-python libvirt-client python3-libvirt python-libvirt

This completes the process for Ubuntu 18.04 hosted on bare metal, please proceed to the Configuration of the Redfish Emulator and vbmc-node section.

Ubuntu 18.04 Hosted on a VM

As indicated above in the installation prerequisites, one has the option of installing sushy-tools directly on the host system or within a virtual machine hosted by the host system. Initially, we went with the latter, simply because it was easier to tear down and build up experimental Redfish simulation engine without polluting our host node. The sushy-tools is also available as a container image in the metal3 project. You can use this image to instantiate the setup using either Docker or Podman as your runtime.

Building the Redfish VM on a host system

Note: You can use the apache-wsgi-sushy-emulator ansible role in the airshipctl repo to setup the emulator with/without authentication, as a WSGI application behind an apache virtual host. This is helpful specifically in environments where you want better scaling of your testing infrastructure and is what Airship uses for testing.

For experimental/smaller setups the following method can also be used.

Get the files to create the VM

Download the Ubuntu 18.04 Server image

ubuntu-18.04.1-server-amd64.iso

Download the Redfish_tools.zip archive and build the redfish emulator VM

Redfish_tools.zip

Scp the redfish_tools zip to the host machine

Note: The host machine must be capable of running a qemu libvirt VM.

Extract the files from the zip archive

Unzip the files in your home directory and cd into that newly created Redfish_tools subdirectory.

Modify the redfish.cfg file

Make the appropriate changes for your domain / network

    user root
    password r00tm3
    timezone UTC
    hostname redfish.oss.labs
    gateway 192.168.122.1
    nameserver 8.8.8.8
    ntpserver 0.centos.pool.ntp.org
Adjust Redfish Admin VM Public IP

Change the IP and netmask below to the IP address and netmask for the Redfish Admin VM on the Public API network

    ens3 192.168.122.10 255.255.255.0 1500
Run the deployment script to deploy the VM

This will be done using the cfg file and the path to Ubuntu image that you downloaded earlier.

./deploy-redfish-vm.py redfish.cfg \
/var/lib/libvirt/images/ubuntu-18.04.1-server-amd64.iso

Optional – You can watch the VM deployment using virt-viewer (if you previously installed the virt-viewer APT package on your host system and have X windows installed)

    virt-viewer redfish
When the VM has finished installing, start the VM
    virsh start redfish
SSH into the VM using the IP address assigned in step 5
    ssh root@192.168.122.10

Configuration of the Redfish Emulator and virtual node

NOTE:If you deployed the Redfish infrastructure VM using the “deploy-redfish-vm.py” script, you can skip to Verify the sushy emulator is working as the script does the work in the next 3 sections for you.

Configure and Install the Sushy-emulator

git clone (https://opendev.org/openstack/sushy-tools.git)
cd sushy-tools/
python3 setup.py build
python3 setup.py install

Update the redfishd and emulator.conf files

scp localsystem//redfishd.service root@redfish_vm_ip://tmp
scp [localsystem://emulator.conf] root@redfish_vm_ip://tmp
vi /tmp/redfishd.service #adjust file for the redfish_vm_ip
vi /tmp/emulator.conf #adjust file for the redfish_vm_ip
mkdir -p /etc/redfish
cp /tmp/emulator.conf /etc/redfish/
cp /tmp/redfishd.service /etc/systemd/system
systemctl start redfishd
systemctl status redfishd
systemctl enable redfishd

Build the virtual node

tmpfile=$(mktemp /tmp/sushy-domain.XXXXXX)
virt-install --name virtual-node --ram 1024 --boot uefi --disk size=1 --vcpus 2\
--os-type linux --os-variant fedora28 --graphics vnc --print-xml > $tmpfile
virsh define --file $tmpfile
rm $tmpfile

Verify the sushy emulator is working and the virtual-node was added

curl -L 'http://192.168.122.10:8000/redfish/v1/Systems'
curl -L 'http://192.168.122.10:8000/redfish/v1/Systems/8e5b2dc4-0c1d-4509-af2f-7a4a8f2121a8'

Note: For virtual media boot, instead of using the IP address 192.168.122.10 (used above), localhost was used in the commands that follow.

Download the bionicpup64-8.0-uefi.iso image

bionicpup64-8.0

Note: Use the 64-bit image with 64-bit VMs as the 32-bit image will hang during kernel initialization.

Upload the image to /tmp of the host node using your preferred scp tool

cp /tmp/bionicpup32-8.0-uefi.iso /var/www/nginxsite.com/public_html/mini.iso

One might also rename the bionicpup64-8.0-uefi.iso to mini.iso to match the documentation

Use a browser to verify the image is downloadable from the webserver

With a browser goto the URL: http://localhost/mini.iso The browser should proceed to download the file

Build a UEFI bootable virtual node

virsh list --all
tmpfile=$(mktemp /tmp/sushy-domain.XXXXXX)
virt-install --name virtual-node --ram 1024 --boot uefi --disk size=1000 \
vcpus 2 --os-type linux --graphics - - vnc --print-xml > $tmpfile
virsh define --file $tmpfile
curl http://localhost:8000/redfish/v1/Systems/

Retrieve the system odata.id (47a3b9a3-3967-4d23-98d8-18de1c28e94f)

It is required in the commands below

curl -d '{"Image":"http://localhost/mini.iso", "Inserted": true}'\
-H "Content-Type: application/json" -X POST \
http://localhost:8000/redfish/v1/Managers/58893887-894-2487-2389-841168418919/VirtualMedia/Cd/Actions/VirtualMedia.InsertMedia-+

Mount the mini.iso

curl http://localhost:8000/redfish/v1/Managers/58893887-894-2487-2389-841168418919/VirtualMedia/Cd

Verify the image is mounted

Expect the following values in the returned data of the API call

  • “Image”: “mini.iso”,

  • “ConnectedVia”: “URI”, “Inserted”: true

curl -X PATCH -H 'Content-Type: application/json' -d '{ "Boot":{\
"BootSourceOverrideTarget": "Cd", "BootSourceOverrideMode": "Uefi",\
"BootSourceOverrideEnabled": "Continuous" } }'\
http://localhost:8000/redfish/v1/Systems/47a3b9a3-3967-4d23-98d8-18de1c28e94f

This sets the BootSourceOverrideTarget,BootSourceOverrideMode

BootSourceOverrideEnabled fields for the vbmc-node**

curl http://localhost:8000/redfish/v1/Systems/47a3b9a3-3967-4d23-98d8-18de1c28e94f

To verify the BootSourceOverride fields are set correctly

curl -d '{"ResetType":"On"}' -H "Content-Type: application/json" -X POST\
http://localhost:8000/redfish/v1/Systems/47a3b9a3-3967-4d23-98d8-18de1c28e94f/Actions/ComputerSystem.Reset

Boot the node

Watch the system boot in the virt-manager console or via virt-viewer virtual-node command