Chapter 5. Configuration hooks

Procedure

1. Create a basic heat template ~/templates/nameserver.yaml that runs a script to write a variable nameserver to the resolv.conf file of a node:

   heat_template_version: 2014-10-16
   
   description: >
     Extra hostname configuration
   
   parameters:
     server:
       type: string
     nameserver_ip:
       type: string
     DeployIdentifier:
       type: string
   
   resources:
     CustomExtraConfigPre:
       type: OS::Heat::SoftwareConfig
       properties:
         group: script
         config:
           str_replace:
             template: |
               #!/bin/sh
               echo "nameserver _NAMESERVER_IP_" > /etc/resolv.conf
             params:
               _NAMESERVER_IP_: {get_param: nameserver_ip}
   
     CustomExtraDeploymentPre:
       type: OS::Heat::SoftwareDeployment
       properties:
         server: {get_param: server}
         config: {get_resource: CustomExtraConfigPre}
         actions: ['CREATE']
         input_values:
           deploy_identifier: {get_param: DeployIdentifier}
   
   outputs:
     deploy_stdout:
       description: Deployment reference, used to trigger pre-deploy on changes
       value: {get_attr: [CustomExtraDeploymentPre, deploy_stdout]}

   In this example, the resources section contains the following parameters:

   CustomExtraConfigPre

   This defines a software configuration. In this example, we define a Bash script and heat replaces _NAMESERVER_IP_ with the value stored in the nameserver_ip parameter.

   CustomExtraDeploymentPre

   This executes a software configuration, which is the software configuration from the CustomExtraConfigPre resource. Note the following:

   • The config parameter references the CustomExtraConfigPre resource so that heat knows which configuration to apply.
   • The server parameter retrieves a map of the overcloud nodes. This parameter is provided by the parent template and is mandatory in templates for this hook.
   • The actions parameter defines when to apply the configuration. In this case, you want to apply the configuration when the overcloud is created. Possible actions include CREATE, UPDATE, DELETE, SUSPEND, and RESUME.
   • input_values contains a parameter called deploy_identifier, which stores the DeployIdentifier from the parent template. This parameter provides a timestamp to the resource for each deployment update to ensure that the resource reapplies on subsequent overcloud updates.

2. Create an environment file ~/templates/pre_config.yaml that registers your heat template to the role-based resource type. For example, to apply the configuration only to Controller nodes, use the ControllerExtraConfigPre hook:

   resource_registry:
     OS::TripleO::ControllerExtraConfigPre: /home/stack/templates/nameserver.yaml
   
   parameter_defaults:
     nameserver_ip: 192.168.1.1

3. Add the environment file to the stack, along with your other environment files:

   $ openstack overcloud deploy --templates \
       ...
       -e /home/stack/templates/pre_config.yaml \
       ...

   This applies the configuration to all Controller nodes before the core configuration begins on either the initial overcloud creation or subsequent updates.

Procedure

1. Create a basic heat template ~/templates/nameserver.yaml that runs a script to append the resolv.conf file of each node with a variable nameserver:

   heat_template_version: 2014-10-16
   
   description: >
     Extra hostname configuration
   
   parameters:
     server:
       type: string
     nameserver_ip:
       type: string
     DeployIdentifier:
       type: string
   
   resources:
     CustomExtraConfigPre:
       type: OS::Heat::SoftwareConfig
       properties:
         group: script
         config:
           str_replace:
             template: |
               #!/bin/sh
               echo "nameserver _NAMESERVER_IP_" >> /etc/resolv.conf
             params:
               _NAMESERVER_IP_: {get_param: nameserver_ip}
   
     CustomExtraDeploymentPre:
       type: OS::Heat::SoftwareDeployment
       properties:
         server: {get_param: server}
         config: {get_resource: CustomExtraConfigPre}
         actions: ['CREATE']
         input_values:
           deploy_identifier: {get_param: DeployIdentifier}
   
   outputs:
     deploy_stdout:
       description: Deployment reference, used to trigger pre-deploy on changes
       value: {get_attr: [CustomExtraDeploymentPre, deploy_stdout]}

   In this example, the resources section contains the following parameters:

   CustomExtraConfigPre

   This parameter defines a software configuration. In this example, you define a Bash script and heat replaces _NAMESERVER_IP_ with the value stored in the nameserver_ip parameter.

   CustomExtraDeploymentPre

   This parameter executes a software configuration, which is the software configuration from the CustomExtraConfigPre resource. Note the following:

   • The config parameter references the CustomExtraConfigPre resource so that heat knows which configuration to apply.
   • The server parameter retrieves a map of the overcloud nodes. This parameter is provided by the parent template and is mandatory in templates for this hook.
   • The actions parameter defines when to apply the configuration. In this case, you only apply the configuration when the overcloud is created. Possible actions include CREATE, UPDATE, DELETE, SUSPEND, and RESUME.
   • The input_values parameter contains a sub-parameter called deploy_identifier, which stores the DeployIdentifier from the parent template. This parameter provides a timestamp to the resource for each deployment update to ensure that the resource reapplies on subsequent overcloud updates.

2. Create an environment file ~/templates/pre_config.yaml that registers your heat template as the OS::TripleO::NodeExtraConfig resource type.

   resource_registry:
     OS::TripleO::NodeExtraConfig: /home/stack/templates/nameserver.yaml
   
   parameter_defaults:
     nameserver_ip: 192.168.1.1

3. Add the environment file to the stack, along with your other environment files:

   $ openstack overcloud deploy --templates \
       ...
       -e /home/stack/templates/pre_config.yaml \
       ...

   This applies the configuration to all nodes before the core configuration begins on either the initial overcloud creation or subsequent updates.

Procedure

1. Create a basic heat template ~/templates/nameserver.yaml that runs a script to append the resolv.conf file of each node with a variable nameserver:

   heat_template_version: 2014-10-16
   
   description: >
     Extra hostname configuration
   
   parameters:
     servers:
       type: json
     nameserver_ip:
       type: string
     DeployIdentifier:
       type: string
     EndpointMap:
       default: {}
       type: json
   
   resources:
     CustomExtraConfig:
       type: OS::Heat::SoftwareConfig
       properties:
         group: script
         config:
           str_replace:
             template: |
               #!/bin/sh
               echo "nameserver _NAMESERVER_IP_" >> /etc/resolv.conf
             params:
               _NAMESERVER_IP_: {get_param: nameserver_ip}
   
     CustomExtraDeployments:
       type: OS::Heat::SoftwareDeploymentGroup
       properties:
         servers:  {get_param: servers}
         config: {get_resource: CustomExtraConfig}
         actions: ['CREATE']
         input_values:
           deploy_identifier: {get_param: DeployIdentifier}

   In this example, the resources section contains the following parameters:

   CustomExtraConfig

   This defines a software configuration. In this example, you define a Bash script and heat replaces _NAMESERVER_IP_ with the value stored in the nameserver_ip parameter.

   CustomExtraDeployments

   This executes a software configuration, which is the software configuration from the CustomExtraConfig resource. Note the following:

   • The config parameter references the CustomExtraConfig resource so that heat knows which configuration to apply.
   • The servers parameter retrieves a map of the overcloud nodes. This parameter is provided by the parent template and is mandatory in templates for this hook.
   • The actions parameter defines when to apply the configuration. In this case, you want apply the configuration when the overcloud is created. Possible actions include CREATE, UPDATE, DELETE, SUSPEND, and RESUME.
   • input_values contains a parameter called deploy_identifier, which stores the DeployIdentifier from the parent template. This parameter provides a timestamp to the resource for each deployment update to ensure that the resource reapplies on subsequent overcloud updates.

2. Create an environment file ~/templates/post_config.yaml that registers your heat template as the OS::TripleO::NodeExtraConfigPost: resource type.

   resource_registry:
     OS::TripleO::NodeExtraConfigPost: /home/stack/templates/nameserver.yaml
   
   parameter_defaults:
     nameserver_ip: 192.168.1.1

3. Add the environment file to the stack, along with your other environment files:

   $ openstack overcloud deploy --templates \
       ...
       -e /home/stack/templates/post_config.yaml \
       ...

   This applies the configuration to all nodes after the core configuration completes on either initial overcloud creation or subsequent updates.

Procedure

1. To add extra configuration to the post-deployment configuration process, create an environment file that contains these parameters in the parameter_defaults section. For example, to increase the reserved memory for Compute hosts to 1024 MB and set the VNC keymap to Japanese, use the following entries in the ComputeExtraConfig parameter:

   parameter_defaults:
     ComputeExtraConfig:
       nova::compute::reserved_host_memory: 1024
       nova::compute::vnc_keymap: ja

2. Include this environment file in the openstack overcloud deploy command, along with any other environment files relevant to your deployment.

Procedure

1. Identify the system UUID from the introspection data for a node:

   $ openstack baremetal introspection data save 9dcc87ae-4c6d-4ede-81a5-9b20d7dc4a14 | jq .extra.system.product.uuid

   This command returns a system UUID. For example:

   "f5055c6c-477f-47fb-afe5-95c6928c407f"

2. Create an environment file to define node-specific hieradata and register the per_node.yaml template to a pre-configuration hook. Include the system UUID of the node that you want to configure in the NodeDataLookup parameter:

   resource_registry:
     OS::TripleO::ComputeExtraConfigPre: /usr/share/openstack-tripleo-heat-templates/puppet/extraconfig/pre_deploy/per_node.yaml
   parameter_defaults:
     NodeDataLookup: '{"f5055c6c-477f-47fb-afe5-95c6928c407f": {"nova::compute::vcpu_pin_set": [ "2", "3" ]}}'

3. Include this environment file in the openstack overcloud deploy command, along with any other environment files relevant to your deployment.

Procedure

1. Create a heat template ~/templates/custom_puppet_config.yaml that launches Puppet configuration.

   heat_template_version: 2014-10-16
   
   description: >
     Run Puppet extra configuration to set new MOTD
   
   parameters:
     servers:
       type: json
     DeployIdentifier:
       type: string
     EndpointMap:
       default: {}
       type: json
   
   resources:
     ExtraPuppetConfig:
       type: OS::Heat::SoftwareConfig
       properties:
         config: {get_file: motd.pp}
         group: puppet
         options:
           enable_hiera: True
           enable_facter: False
   
     ExtraPuppetDeployments:
       type: OS::Heat::SoftwareDeploymentGroup
       properties:
         config: {get_resource: ExtraPuppetConfig}
         servers: {get_param: servers}

   This example includes the /home/stack/templates/motd.pp within the template and passes it to nodes for configuration. The motd.pp file contains the Puppet classes necessary to install and configure motd.

2. Create an environment file ~templates/puppet_post_config.yaml that registers your heat template as the OS::TripleO::NodeExtraConfigPost: resource type.

   resource_registry:
     OS::TripleO::NodeExtraConfigPost: /home/stack/templates/custom_puppet_config.yaml

3. Include this environment file in the openstack overcloud deploy command, along with any other environment files relevant to your deployment.

   $ openstack overcloud deploy --templates \
       ...
       -e /home/stack/templates/puppet_post_config.yaml \
       ...

   This applies the configuration from motd.pp to all nodes in the overcloud.