bifrost/playbooks/roles/bifrost-ironic-install

bifrost-ironic-install

This role installs a standalone ironic deployment with all required substrate in order for it to be utilized, including MySQL, RabbitMQ, dnsmasq, and nginx.

Requirements

This role requires:

• Ansible 1.9

Internet access was originally a requirement but no longer is. See doc/source/offline-install.rst for details on installing without it.

Role Variables

Testing mode is intended to help facilitate testing of the bifrost roles and ironic by utilizing virtual machines on the localhost and the agent_ssh driver. This variable should be set globally for playbooks utilizing the bifrost-ironic-install role.

testing: false

Node cleaning, which was a feature added to ironic during the Kilo cycle, removes the previous contents of a node once it has been moved from an active to available state, such as setting the provision state to deleted. Bifrost disables this by default in order to allow initial users to not be impacted by node cleaning operations upfront when they are testing and evaluating bifrost. In the event of a production deployment, cleaning should be enabled.

cleaning: false

The ironic python client and shade libraries can be installed directly from Git. The default is to utilize pip to install the current versions in pypi, however testing may require master branch or custom patches.

ironicclient_source_install: false shade_source_install: false

Bifrost requires access to the network where nodes are located, in order to provision the nodes. By default, this setting is set to a value for local VM based testing, however if and when you're ready to deploy to a physical environment, you will need to set the network_interface variable to the attached network.

network_interface: "virbr0"

By default this role installs dnsmasq to act as a DHCP server for provisioning hosts. In the event this is not required, set the following configuration:

include_dhcp_server: false

If you chose to utilize the dhcp server, You may wish to set default ranges:

dhcp_pool_start: 192.168.1.200 dhcp_pool_end: 192.168.1.250

And also set the default dhcp address lease time:

dhcp_lease_time: 12h

Alternatively, a user can choose to perform static DHCP assignments to nodes. This can be enabled by setting the inventory_dhcp setting to true. This will result in the dhcp_pool_start and dhcp_pool_end settings being ignored and the ipv4_address setting being bound to the first listed MAC address for the node.

In case your HW needs a kernel option to boot, set the following variable:

extra_kernel_options: Default undefined.

When testing, the default ironic conductor driver is "agent_ssh". When testing mode has not been engaged, drivers can be set via the enabled_drivers variable which defaults to: "agent_ipmitool,pxe_amt,agent_ilo,agent_ucs"

In the event of an external DHCP server being used, the user will need to configure their DHCP server such that PXE, and iPXE chain loading occurs. For additional information for setting up DHCP in this scenario refer to the bifrost documentation file doc/source/deploy/dhcp.rst.

Additional default variables exist in defaults/main.yml, however these are mainly limited to settings which are unlikely to be modified, unless a user has a custom Ironic Python Agent image, or needs to modify where the httpboot folder is set to.

This role has several variables that can vary between OS families, distributions, and their specific versions. These are specified in the required_defaults_* files. They are imported in a particular order. For example, for Ubuntu 15.04, the role will attempt to import the following files:

• required_defaults_Debian.yml
• required_defaults_Ubuntu.yml
• required_defaults_Ubuntu_15.04.yml

Not all of the possible files for a given distribution/version combination need to exist. The recommended approach for adding a new variable is:

• Put the variable in the most generic set of defaults to which it applies: for example, if a given variable is applicable to all Debian-family OSes, put it in required_defaults_Debian.yml

• Variables specified in the more specific files will be used to override values in the more generic defaults files.

• If a given default applies to multiple versions of a distribution, that variable needs to be specified for each version which it affects.

If you wish to enable Cross-Origin Resource Sharing (CORS), such as to connect a javascript based web client, options have been added to allow a user to enable the integrated support.

By default, this support is disabled, but the configuration options are below:

enable_cors: Boolean value, default false, to enable CORS support.

cors_allowed_origin: A URL string that represents the origin sent by the client web browser. If CORS is enabled, and this is not set, it will default to http://localhost:8000/.

enable_cors_credential_support: Boolean value, default false. This variable toggles the CORS configuration to expect user authentication. Since bifrost makes use of noauth mode, this realistically should not be modified.

Notes

This role, by default, deploys an alternative boot.ipxe file to the one that ironic deploys, and configures ironic to use this alternative file. This is because not every boot case can be covered. If you encounter a case where you find that you need to modify the file, please notify us by filing a bug in Launchpad, https://bugs.launchpad.net/bifrost/.

Dependencies

None at this time.

Example Playbook

• hosts: localhost connection: local name: "Install ironic locally" become: yes gather_facts: yes roles:
  • role: bifrost-ironic-install cleaning: false testing: true network_interface: "virbr0"

License

Copyright (c) 2015 Hewlett-Packard Development Company, L.P.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Author Information

Ironic Developers