Ironic - Bare Metal provisioning

Overview

Ironic works well in Kolla, though it is not thoroughly tested as part of Kolla CI, so may be subject to instability.

Pre-deployment Configuration

Enable Ironic in /etc/kolla/globals.yml:

enable_ironic: "yes"

In the same file, define a network interface as the default NIC for dnsmasq, a range of IP addresses that will be available for use by Ironic inspector, as well as a network to be used for the Ironic cleaning network:

ironic_dnsmasq_interface: "eth1"
ironic_dnsmasq_dhcp_range: "192.168.5.100,192.168.5.110"
ironic_cleaning_network: "public1"

In the same file, optionally a default gateway to be used for the Ironic Inspector inspection network:

ironic_dnsmasq_default_gateway: 192.168.5.1

In the same file, specify the PXE bootloader file for Ironic Inspector. The file is relative to the /tftpboot directory. The default is pxelinux.0, and should be correct for x86 systems. Other platforms may require a different value, for example aarch64 on Debian requires debian-installer/arm64/bootnetaa64.efi.

ironic_dnsmasq_boot_file: pxelinux.0

Ironic inspector also requires a deploy kernel and ramdisk to be placed in /etc/kolla/config/ironic/. The following example uses coreos which is commonly used in Ironic deployments, though any compatible kernel/ramdisk may be used:

$ curl https://tarballs.openstack.org/ironic-python-agent/dib/files/ipa-centos7-master.kernel \
  -o /etc/kolla/config/ironic/ironic-agent.kernel

$ curl https://tarballs.openstack.org/ironic-python-agent/dib/files/ipa-centos7-master.initramfs \
  -o /etc/kolla/config/ironic/ironic-agent.initramfs

You may optionally pass extra kernel parameters to the inspection kernel using:

ironic_inspector_kernel_cmdline_extras: ['ipa-lldp-timeout=90.0', 'ipa-collect-lldp=1']

in /etc/kolla/globals.yml.

Enable iPXE booting (optional)

You can optionally enable booting via iPXE by setting enable_ironic_ipxe to true in /etc/kolla/globals.yml:

enable_ironic_ipxe: "yes"

This will enable deployment of a docker container, called ironic_ipxe, running the web server which iPXE uses to obtain it’s boot images.

The port used for the iPXE webserver is controlled via ironic_ipxe_port in /etc/kolla/globals.yml:

ironic_ipxe_port: "8089"

The following changes will occur if iPXE booting is enabled:

  • Ironic will be configured with the ipxe_enabled configuration option set to true

  • The inspection ramdisk and kernel will be loaded via iPXE

  • The DHCP servers will be configured to chainload iPXE from an existing PXE environment. You may also boot directly to iPXE by some other means e.g by burning it to the option rom of your ethernet card.

Deployment

Run the deploy as usual:

$ kolla-ansible deploy

Post-deployment configuration

A script named init-runonce is supplied as part of kolla-ansible to initialise the cloud with some defaults (only to be used for demo purposes):

tools/init-runonce

The Ironic documentation describes how to create the deploy kernel and ramdisk and register them with Glance. In this example we’re reusing the same images that were fetched for the Inspector:

openstack image create --disk-format aki --container-format aki --public \
  --file /etc/kolla/config/ironic/ironic-agent.kernel deploy-vmlinuz

openstack image create --disk-format ari --container-format ari --public \
  --file /etc/kolla/config/ironic/ironic-agent.initramfs deploy-initrd

The Ironic documentation describes how to create Nova flavors for bare metal. For example:

openstack flavor create --ram 512 --disk 1 --vcpus 1 my-baremetal-flavor
openstack flavor set my-baremetal-flavor --property \
  resources:CUSTOM_BAREMETAL_RESOURCE_CLASS=1 \
  resources:resources:VCPU=0 \
  resources:resources:MEMORY_MB=0 \
  resources:resources:DISK_GB=0

The Ironic documentation describes how to enroll baremetal nodes and ports. In the following example ensure to substitute correct values for the kernel, ramdisk, and MAC address for your baremetal node.

openstack baremetal node create --driver ipmi --name baremetal-node \
  --driver-info ipmi_port=6230 --driver-info ipmi_username=admin \
  --driver-info ipmi_password=password \
  --driver-info ipmi_address=192.168.5.1 \
  --resource-class baremetal-resource-class --property cpus=1 \
  --property memory_mb=512 --property local_gb=1 \
  --property cpu_arch=x86_64 \
  --driver-info deploy_kernel=15f3c95f-d778-43ad-8e3e-9357be09ca3d \
  --driver-info deploy_ramdisk=9b1e1ced-d84d-440a-b681-39c216f24121

openstack baremetal port create 52:54:00:ff:15:55 \
  --node 57aa574a-5fea-4468-afcf-e2551d464412 \
  --physical-network physnet1

Make the baremetal node available to nova:

openstack baremetal node manage 57aa574a-5fea-4468-afcf-e2551d464412
openstack baremetal node provide 57aa574a-5fea-4468-afcf-e2551d464412

It may take some time for the node to become available for scheduling in nova. Use the following commands to wait for the resources to become available:

openstack hypervisor stats show
openstack hypervisor show 57aa574a-5fea-4468-afcf-e2551d464412

Booting the baremetal

You can now use the following sample command to boot the baremetal instance:

openstack server create --image cirros --flavor my-baremetal-flavor \
  --key-name mykey --network public1 demo1

Notes

Debugging DHCP

The following tcpdump command can be useful when debugging why dhcp requests may not be hitting various pieces of the process:

tcpdump -i <interface> port 67 or port 68 or port 69 -e -n

Configuring the Web Console

Configuration based off upstream Node web console.

Serial speed must be the same as the serial configuration in the BIOS settings. Default value: 115200bps, 8bit, non-parity.If you have different serial speed.

Set ironic_console_serial_speed in /etc/kolla/globals.yml:

ironic_console_serial_speed: 9600n8

Deploying using virtual baremetal (vbmc + libvirt)

See https://brk3.github.io/post/kolla-ironic-libvirt/