概述

IMPITool驱动是通过ipmitool工具来管理部署节点的，目前主要有两个驱动：

• agent_ipmitool
• pxe_ipmitool

配置驱动

要修改ironic支持的驱动需要修改配置文件/etc/ironic/ironic.conf的ennabled_drivers字段。
如果没有配置，默认情况下，ironic使用的是pxe_ipmitool驱动。

[DEFAULT]
...
enabled_drivers = pxe_ipmitool,agent_ipmitool

修改完成之后需要重启conductor服务生效

 systemctl restart openstack-ironic-conductor.service

node节点注册驱动

一个完整的ironic node信息如下表所示。从表中driver字段可以看出使用的是pxe_ipmitool驱动。
从driver_info字段可以看出impi的地址，用户名，密码等信息（这里密码使用*号代替了，具体可以配置）。

[root@ctrl templates(keystone_admin)]# ironic node-show 94c2fce1-acc4-4e28-b9f9-0761ebd8be31
+------------------------+-------------------------------------------------------------------------+
| Property               | Value                                                                   |
+------------------------+-------------------------------------------------------------------------+
| chassis_uuid           |                                                                         |
| clean_step             | {}                                                                      |
| console_enabled        | False                                                                   |
| created_at             | 2016-11-30T09:00:26+00:00                                               |
| driver                 | pxe_ipmitool                                                            |
| driver_info            | {u'ipmi_address': u'192.168.1.2', u'ipmi_username': u'user',            |
|                        | u'ipmi_password': u'******'}                                            |
| driver_internal_info   | {u'agent_erase_devices_iterations': 1}                                  |
| extra                  | {}                                                                      |
| inspection_finished_at | None                                                                    |
| inspection_started_at  | None                                                                    |
| instance_info          | {u'deploy_key': u'BK26BQPYH3PC024H321294L200TXGIUJ'}                    |
| instance_uuid          | None                                                                    |
| last_error             | None                                                                    |
| maintenance            | True                                                                    |
| maintenance_reason     | Failed to prepare node 94c2fce1-acc4-4e28-b9f9-0761ebd8be31 for         |
|                        | cleaning: Cannot validate PXE bootloader. Some parameters were missing  |
|                        | in node's driver_info. Missing are: ['deploy_ramdisk', 'deploy_kernel'] |
| name                   | None                                                                    |
| power_state            | power off                                                               |
| properties             | {u'memory_mb': u'562144', u'cpu_arch': u'x86_64', u'local_gb': u'1114', |
|                        | u'cpus': u'40'}                                                         |
| provision_state        | clean failed                                                            |
| provision_updated_at   | 2016-12-01T03:37:20+00:00                                               |
| raid_config            |                                                                         |
| reservation            | None                                                                    |
| target_power_state     | None                                                                    |
| target_provision_state | available                                                               |
| target_raid_config     |                                                                         |
| updated_at             | 2016-12-01T03:37:20+00:00                                               |
| uuid                   | 94c2fce1-acc4-4e28-b9f9-0761ebd8be31                                    |
+------------------------+-------------------------------------------------------------------------+

ironic是在创建node的时候指定驱动的，具体步骤如下：

ironic node-create -d pxe_ipmitool -i ipmi_address=<address>
-i ipmi_username=<username> -i ipmi_password=<password>

-d指定使用的驱动， -i指定驱动的信息。
一般需要driver_info需要指定如下信息：

1. ipmi_address
2. ipmi_username
3. ipmi_password
4. ipmi_port # 远程IPMI RMCP端口，默认使用623端口

目前如果使用agent_ipmitool驱动要求配置Swift Temp URLs。这个问题已经有人在社区反应了，具体链接如下：
https://bugs.launchpad.net/openstack-ansible/+bug/1634299
使用agent_ipmitool配置如下：

[DEFAULT]
enabled_drivers=agent_pyghmi,agent_ipmitool  # we're using the agent
debug=true  # we believe in logging all the things
rpc_thread_pool_size=4  # we've found this to work best with high load conductors
rpc_conn_pool_size=20  # we've found this to work best with high load conductors[conductor]
force_power_state_during_sync=false  # we don't want any surprises :)[glance]  # these settings are required for using swift temp URLs
swift_temp_url_key=<lol>
swift_scheme=https
swift_endpoint_url=<swift-host>
swift_path=/v1/<rackspace_tenant>
swift_backend_container=<rackspace_container>[agent]
dhcp_provider=external
heartbeat_timeout=30  # relied on for deploys, shorter timeout means shorter deploys. We'll be fixing this in code soon.
provisioning_network_uuid=<network_id>