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 only being used to define the range of valid ips to be accepted, and the ipv4_address setting being bound to the first listed MAC address for the node. If you choose to use the static DHCP assignments, you may need to set the dhcp_static_mask setting according to your needs. It defaults to a /24 range. In the case of static inventory, please also consider to set the dhcp_lease_time setting to infinite, to avoid unnecessary refreshes of ips.

If you want to force all hostnames to resolve to ipv4_address set on the inventory, please set the inventory_dns setting to true.

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,agent_ilo,agent_ucs"

By default, PXE driver baseline support, in terms of installation of the iSCSI client and configuration of sudoers and rootwrap configuration is enabled. If you wish to disable this functionality, set enable_pxe_drivers to a value of false.

enable_pxe_drivers: false

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 operating systems, 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.

domain: String value, default to false. If set, domain setting is configured in dnsmasq.

remote_syslog_server: String value, default undefined. If set, rsyslog is configured to send logs to this server.

remote_syslog_port: String value, default is 514. If set, custom port is configured for remote syslog server.

Hardware Inspection Support

Bifrost also supports the installation of ironic-inspector in standalone mode, which enables the user to allow for identification of the system properties via a workflow.

enable_inspector: Boolean value, default true. Set this value to false to prevent installing ironic-inspector.

inspector_auth: Sets ironic-inspector's authentication method. Possible values are keystone and noauth. noauth is recommended since bifrost by default installs ironic as standalone without keystone. The default value is noauth.

inspector_debug: Boolean value, default true. Enables debug level logging for inspector. Note that this default may change in future.

inspector_manage_firewall: Boolean value, default false. Controls whether ironic-inspector should manage the firewall rules of the host. Bifrost's installation playbook adds the rule to permit the callback traffic, so you shouldn't need to enable this.

ironic_auth_strategy: Sets the auth_strategy ironic-inspector should use with ironic. Possible values are noauth and keystone. The default value is noauth.

inspector_data_dir: Base path for ironic-inspector's temporary data and log files. The default location is /opt/stack/ironic-inspector/var.

inspector_port_addition: Defines which MAC addresses to add as ports during introspection. Possible values are all, active, and pxe. The default value is pxe.

inspector_keep_ports: Defines which ports on a node to keep after introspection. Possible values are all, present, and added. The default value is present.

inspector_store_ramdisk_logs: Boolean value, default true. Controls if the inspector agent will retain logs from the ramdisk that called the inspector service.

enable_inspector_discovery: Boolean value, default true. This instructs inspector to add new nodes that are discovered via PXE booting on the same network to ironic.

inspector_default_node_driver: The default driver to utilize when adding discovered nodes to ironic. The default value set by bifrost is agent_ipmitool. Users should change this setting for their install environment if an alternative default driver is required.

Virtual Environment Install

Bifrost can install ironic into a python virtual environment using the following configuration options:

enable_venv: Enables virtual environment support. Boolean value; the default is false. enable_venv is automatically defined as true if VENV is set in the user's environment.

bifrost_venv_dir: The full path of the virtual environment directory. The default value is /opt/stack/bifrost. When VENV is set in the user's environment, its contents will be used to set bifrost_venv_dir.

bifrost_venv_env: An environment dictionary that includes the environment variables used to run commands which require the virtual environment. The default values are derived from the standard 'activate' script which virtualenv installs. It is best not to reset this value unless you know you need to.

ssh_private_key_path: Defines the path to the SSH private key file to be placed as default ssh key for ironic user. Can be useful when ironic requires ssh access to another server.

ssh_private_key: If a user wishes to define an SSH private key as a string, this variable can be utilized which overrides the ssh_private_key_path setting.

Changing Database Configuration

Bifrost utilizes a nested data stucture for the configuration of database. Simply put:

• Values cannot be overrriden via set_fact.
• Values cannot be overrriden via the command line with -e.
• The entire data structure must be defined if is modified.

Please see defaults/main.yml file for the structure named ironic.

Please note, if the hostname is set to something besideslocalhost, then the playbook will not attempt to create databases, database users, and grant privileges.

Similarly, if hardware introspection support is installed, the nearly identical data structure for inspector can be found in the same file named ironic_inspector.

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