Using Bare Metal service as a standalone service¶

It is possible to use the Bare Metal service without other OpenStack services. You should make the following changes to /etc/ironic/ironic.conf:

To disable usage of Identity service tokens:
```
[DEFAULT]
...
auth_strategy=noauth
```
If you want to disable the Networking service, you should have your network pre-configured to serve DHCP and TFTP for machines that you’re deploying. To disable it, change the following lines:
```
[dhcp]
...
dhcp_provider=none
```
Note

If you disabled the Networking service and the driver that you use is supported by at most one conductor, PXE boot will still work for your nodes without any manual config editing. This is because you know all the DHCP options that will be used for deployment and can set up your DHCP server appropriately.

If you have multiple conductors per driver, it would be better to use Networking since it will do all the dynamically changing configurations for you.
If you want to disable using a messaging broker between conductor and API processes, switch to JSON RPC instead:
```
[DEFAULT]
rpc_transport = json-rpc
```

If you don’t use Image service, it’s possible to provide images to Bare Metal service via a URL.

Note

At the moment, only two types of URLs are acceptable instead of Image service UUIDs: HTTP(S) URLs (for example, “http://my.server.net/images/img”) and file URLs (file:///images/img).

There are however some limitations for different hardware interfaces:

If you’re using Direct deploy, you have to provide the Bare Metal service with the MD5 checksum of your instance image. To compute it, you can use the following command:
```
md5sum image.qcow2
ed82def8730f394fb85aef8a208635f6  image.qcow2
```
Direct deploy requires the instance image be accessible through a HTTP(s) URL.

Steps to start a deployment are pretty similar to those when using Compute:

To use the openstack baremetal CLI, set up these environment variables. Since no authentication strategy is being used, the value none must be set for OS_AUTH_TYPE. OS_ENDPOINT is the URL of the ironic-api process. For example:
```
export OS_AUTH_TYPE=none
export OS_ENDPOINT=http://localhost:6385/
```

Create a node in Bare Metal service. At minimum, you must specify the driver name (for example, ipmi). You can also specify all the required driver parameters in one command. This will return the node UUID:

openstack baremetal node create --driver ipmi \
    --driver-info ipmi_address=ipmi.server.net \
    --driver-info ipmi_username=user \
    --driver-info ipmi_password=pass \
    --driver-info deploy_kernel=file:///images/deploy.vmlinuz \
    --driver-info deploy_ramdisk=http://my.server.net/images/deploy.ramdisk

+--------------+--------------------------------------------------------------------------+
| Property     | Value                                                                    |
+--------------+--------------------------------------------------------------------------+
| uuid         | be94df40-b80a-4f63-b92b-e9368ee8d14c                                     |
| driver_info  | {u'deploy_ramdisk': u'http://my.server.net/images/deploy.ramdisk',       |
|              | u'deploy_kernel': u'file:///images/deploy.vmlinuz', u'ipmi_address':     |
|              | u'ipmi.server.net', u'ipmi_username': u'user', u'ipmi_password':         |
|              | u'******'}                                                               |
| extra        | {}                                                                       |
| driver       | ipmi                                                                     |
| chassis_uuid |                                                                          |
| properties   | {}                                                                       |
+--------------+--------------------------------------------------------------------------+

Note that here deploy_kernel and deploy_ramdisk contain links to images instead of Image service UUIDs.

As in case of Compute service, you can also provide capabilities to node properties, but they will be used only by Bare Metal service (for example, boot mode). Although you don’t need to add properties like memory_mb, cpus etc. as Bare Metal service will require UUID of a node you’re going to deploy.
Then create a port to inform Bare Metal service of the network interface cards which are part of the node by creating a port with each NIC’s MAC address. In this case, they’re used for naming of PXE configs for a node:
```
openstack baremetal port create $MAC_ADDRESS --node $NODE_UUID
```
You also need to specify image information in the node’s instance_info (see Create user images for the Bare Metal service):
- image_source - URL of the whole disk or root partition image, mandatory. For Direct deploy only HTTP(s) links are accepted, while iSCSI deploy also accepts links to local files (prefixed with file://).
- root_gb - size of the root partition, required for partition images.
  
  Note
  
  Older versions of the Bare Metal service used to require a positive integer for root_gb even for whole-disk images. You may want to set it for compatibility.
- image_checksum - MD5 checksum of the image specified by image_source, only required for Direct deploy.
  
  Note
  
  Additional checksum support exists via the image_os_hash_algo and image_os_hash_value fields. They may be used instead of the image_checksum field.
  
  Starting with the Stein release of ironic-python-agent can also be a URL to a checksums file, e.g. one generated with:
```
cd /path/to/http/root
md5sum *.img > checksums
```
- kernel, ramdisk - HTTP(s) or file URLs of the kernel and initramfs of the target OS. Must be added only for partition images.
For example:
```
openstack baremetal node set $NODE_UUID \
    --instance-info image_source=$IMG \
    --instance-info image_checksum=$MD5HASH \
    --instance-info kernel=$KERNEL \
    --instance-info ramdisk=$RAMDISK \
    --instance-info root_gb=10
```
With a whole disk image:
```
openstack baremetal node set $NODE_UUID \
    --instance-info image_source=$IMG \
    --instance-info image_checksum=$MD5HASH
```
Boot mode can be specified per instance:
```
openstack baremetal node set $NODE_UUID \
    --instance-info deploy_boot_mode=uefi
```
Otherwise, the boot_mode capability from the node’s properties will be used.

Warning

The two settings must not contradict each other.

Note

The boot_mode capability is only used in the node’s properties, not in instance_info like most other capabilities. Use the separate instance_info/deploy_boot_mode field instead.

To override the boot option used for this instance, set the boot_option capability:

openstack baremetal node set $NODE_UUID \
    --instance-info capabilities='{"boot_option": "local"}'

Starting with the Ussuri release, you can set root device hints per instance:
```
openstack baremetal node set $NODE_UUID \
    --instance-info root_device='{"wwn": "0x4000cca77fc4dba1"}'
```
This setting overrides any previous setting in properties and will be removed on undeployment.

Validate that all parameters are correct:

openstack baremetal node validate $NODE_UUID

+------------+--------+----------------------------------------------------------------+
| Interface  | Result | Reason                                                         |
+------------+--------+----------------------------------------------------------------+
| boot       | True   |                                                                |
| console    | False  | Missing 'ipmi_terminal_port' parameter in node's driver_info.  |
| deploy     | True   |                                                                |
| inspect    | True   |                                                                |
| management | True   |                                                                |
| network    | True   |                                                                |
| power      | True   |                                                                |
| raid       | True   |                                                                |
| storage    | True   |                                                                |
+------------+--------+----------------------------------------------------------------+

Now you can start the deployment, run:

openstack baremetal node deploy $NODE_UUID

For iLO drivers, fields that should be provided are:

ilo_deploy_iso under driver_info;
ilo_boot_iso, image_source, root_gb under instance_info.

Note

The Bare Metal service tracks content changes for non-Glance images by checking their modification date and time. For example, for HTTP image, if ‘Last-Modified’ header value from response to a HEAD request to “http://my.server.net/images/deploy.ramdisk” is greater than cached image modification time, Ironic will re-download the content. For “file://” images, the file system modification time is used.

Other references¶

Enabling local boot without Compute

Using Bare Metal service as a standalone service

Using Bare Metal service as a standalone service¶

Other references¶

ironic

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