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IRONIC
OPENSTACK BAREMETAL PROVISIONING SERVICE
Hao Meng, Wang
IRC: Haomeng
whaom@cn.ibm.com
June, 2014

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AGENDA
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Bare Metal Provision Domain
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Why Provision Bare Metal(BM)
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Provision Methods & Scenarios
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Key Technologies for BM Provision
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PXE ROM & NBP
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IPMI Functions
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IPMI Block Diagram
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IPMI + PXE Provising Workflow
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Ironic
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About Ironic
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Architecture
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Conceptual
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Logical
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Framework
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Components
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BM Provision Sequence Diagram
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Data Model
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Images used by Ironic
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Commands
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How to use Ironic
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TripleO

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Why Provision Bare Metal(BM)
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Database/Hadoop hosting (some
databases run poorly in a hypervisor)
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Single tenant, dedicated hardware for
performance, security, dependability and
other regulatory requirements
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Computing tasks that require access to
hardware devices which can’t be
virtualized
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High-performance computing(HPC) clusters, physical compute nodes
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Or, rapidly deploying a cloud infrastructure self, TripleO or others
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Cloud scaling out
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X86_64, ARM, TILE-Gx16/36/64/100 systems
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SoftLayer / Racespace Cloud supports bare-metal as service

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Provision Methods & Scenarios
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Methods
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CLONE – ghost/dd
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INSTALL – JumpStart/KickStart/OS Installer
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CLONE + INSTALL
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Scenarios
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Diskful
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HD/SSD
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iSCSI/SAN disk
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Diskless
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RAM Disk

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Key Technologies for BM Provision
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PXE Preboot Execution Environment (PXE) is part of the Wired for Management (WfM) specification
developed by Intel and Microsoft. Booting computers via a network.
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NBP Network Bootstrap Program (NBP) is equivalent to GRUB (GRand Unified Bootloader) or LILO
(LInux LOader) - loaders which are traditionally used in local booting. Like the boot program in a hard
drive environment, the NBP is responsible for loading the OS kernel into memory so that the OS can be
bootstrapped over a network.
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IPMI Intelligent Platform Management Interface (IPMI) is a standardized computer system interface
used by system administrators for out-of-band management of computer systems and monitoring of
their operation.
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DHCP Using PXE, the BIOS uses DHCP to obtain an IP address for the network interface and to
locate the server that stores the network bootstrap program (NBP).
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TFTP Trivial File Transfer Protocol (TFTP) is a simple file transfer protocol that is generally used for
automated transfer of configuration or boot files between machines in a local environment. In a PXE
environment, TFTP is used to download NBP over the network using information from the DHCP
server.
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iSCSI Internet Small Computer System Interface, uses this to 'dd' the image to target machnie
local disk

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PXE ROM & NBP (bootloader,pxelinux.0)
PXE ROM Chip

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NBP bootloader config file sample
default deploy
label deploy
kernel /tftpboot/76305cdf-a30a-453e-bc92-b3f869a27fd8/deploy_kernel
append initrd=/tftpboot/76305cdf-a30a-453e-bc92-b3f869a27fd8/deploy_ramdisk selinux=0
disk=cciss/c0d0,sda,hda,vda iscsi_target_iqn=iqn-76305cdf-a30a-453e-bc92-b3f869a27fd8
deployment_id=76305cdf-a30a-453e-bc92-b3f869a27fd8
deployment_key=UKKQZ3N2AOUJ45NZVB27L25XKR6I57V8 ironic_api_url=http://192.0.2.1:6385
troubleshoot=0 nofb nomodeset vga=normal
label boot
kernel /tftpboot/76305cdf-a30a-453e-bc92-b3f869a27fd8/kernel
append initrd=/tftpboot/76305cdf-a30a-453e-bc92-b3f869a27fd8/ramdisk root=UUID=319005ff-9177-45af-
87db-ada3a1f6dc9f ro nofb nomodeset vga=normal

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IPMI Functions
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power Shortcut to chassis power commands
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chassis bootdev Set the boot device
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sensor Print detailed sensor information
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sol Configure and connect IPMIv2.0 Serial-over-LAN
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...

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IPMI Block Diagram
IPMI Port

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IPMI NIC Port

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“Ironic is an Incubated OpenStack project which aims to
provision bare metal (as opposed to virtual) machines by
leveraging common technologies such as PXE boot and IPMI
to cover a wide range of hardware, while supporting
pluggable drivers to allow vendor-specific functionality to be
added.”
http://docs.openstack.org/developer/ironic/
About Ironic

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Conceptual Architecture

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Logical Architecture

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Framework

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Ironic Components
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Ironic-api
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handles the remote api requests
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Ironic-conductor
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talk with physical machines
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Nova compute driver
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Implements the nova virt.ComputeDriver.
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Direct the calls to Ironic
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CLI client
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Ironic deployment ramdisk agent
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Built by diskimage-builder
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Deploy by PXE, talk with Ironic-
conductor
RAMDISK Agent - https://github.com/openstack/diskimage-builder/tree/master/elements/deploy-ironic

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Juno Teeth Agent
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In Juno release, a new ramdisk agent will be introduced to Ironic by
RackSapce. (teeth agent) The new name is Ironic Python Agent
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Supports:
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Partition disks
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Erase disks
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Install bootloaders
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Install an OS image
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Update firmware
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Configure RAID and more....
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A new DeployInterface driver will be written to communicate with the new
Teeth agent.

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Ironic BM Provision Sequence Diagram

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Ironic Objects Model

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Images used by Ironic
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NBP
– Ironic.conf pxe_bootfile_name
– default pxelinux.0
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Ironic Deployment Agent
– bm-deploy-kernel / bm-deploy-ramdisk
– BM flavor's extra_specs data –
baremetal:deploy_kernel_id/baremetal:deploy_ramdisk_id
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User Image – to be deployed to bm
– user-image/
– user-image-vmlinuz
– user-image-initrd
– Images' kernel_id/ramdisk_id ext props
•

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Ironic Commands
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node-create - Create a new node.
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node-delete - Delete a node.
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node-get-console - return the connection information about the console.
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node-list - list nodes.
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node-set-console-mode - Enable or disable the console access.
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node-set-power-state - Power the node on or off.
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node-set-provision-state - Provision or tear down a node.
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node-show - Show a node.
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node-update - Upate a node.
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node-validate - Validate the node driver interfaces.

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Ironic Commands
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port-create - Create a new port.
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port-delete - Delete a port.
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port-list - List ports.
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port-show - Show a port.
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port-update - Update a port.
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chassis-create - Create a new chassis.
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chassis-delete - Delete a chassis.
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chassis-list - List chassis.
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chassis-node-list - List the nodes contained in the chassis.
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chassis-show - Show a chassis.
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chassis-update - Update a chassis.
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driver-list - List drivers.
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driver-show - Show a driver.

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How to use Ironic
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Install Ironic - Try with devstack or TripleO's Devtest, it supports Ironic for long time
– http://docs.openstack.org/developer/ironic/dev/dev-quickstart.html#deploying-ironic-with-devstack
– https://wiki.openstack.org/wiki/Tuskar/Devtest
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Setup the compute node's nova.conf
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compute_driver = ironic.nova.virt.ironic.driver.IronicDriver
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scheduler_host_manager = ironic.nova.scheduler.ironic_host_manager.IronicHostManager
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Setup tftp folder and prepare pxe boot loader file
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# cp pxelinux.0 /YOUR_TFTP_FOLDER/
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Prepare the baremetal flavor
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# nova flavor-create <name> <id> <ram> <disk> <vcpus>
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# nova flavor-key baremetal set "cpu_arch"="$ARCH" "baremetal:deploy_kernel_id"="$deploy_kernel_id"
"baremetal:deploy_ramdisk_id"="$deploy_ramdisk_id"
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Register these nodes with correct drivers
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# ironic node-create driver=pxe_ipmitool
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Register the ports information
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# ironic port-create -a aa:bb:cc:dd:ee:ff -n 76305cdf-a30a-453e-bc92-b3f869a27fd8
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Nova boot to kick off the baremetal provision
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Check node's provision_state/power_state value
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# ironic node-show 76305cdf-a30a-453e-bc92-b3f869a27fd8

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TripleO
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TripleO = OpenStack on OpenStack
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INFO: May 2014 at the Atlanta Summit: both RedHat's (InStack) and HP's
(Helion) OpenStack distributions are now based on TripleO

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TripleO – Covers full DevOps
TripleO = NovaBM/Ironic
+ os-collect-config
+ os-apply-config
+ os-refresh-config
+ os-cloud-config
+ diskimage-builder (dib)
+ tripleo-image-elements (dib)
+ tripleo-heat-elements (dib)
+ Tuskar(tuskar/tuskarui/python-tuskarclient)

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TripleO – Block Diagram
v

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PC
Seed VM
Undercloud
Overcloud
Controller
Overcloud
Compute
Overcloud
Compute
Workload
Workload Workload
$ heat stack-create
undercloud
$ heat stack-create
overcloud
$ heat stack-create
workload
Seed / under / over Clouds in TripleO

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References
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Ironic wiki - https://wiki.openstack.org/wiki/Ironic
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PXE Spec - http://download.intel.com/design/archives/wfm/downloads/pxespec.pdf
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IPMI overview - http://www.intel.com/content/dam/www/public/us/en/documents/product-
briefs/ipmi-overview.pdf
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IPMI Spec - http://www.intel.com/content/www/us/en/servers/ipmi/ipmi-specifications.html
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TripleO - https://wiki.openstack.org/wiki/TripleO

28.
THANK YOU