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undercloud-deploy

An Ansible role to execute the deployment of the tripleo undercloud

Requirements

This requires a running host to deploy the undercloud.

Role Variables

undercloud_templates_path: <'/usr/share/openstack-tripleo-heat-templates'> -- a path to git clone and check-out t-h-t templates from the corresponding repo/branch/ref paths.
undercloud_config_file: <'undercloud.conf.j2'> -- the name of the jinja template used as the base for the undercloud.conf
undercloud_install_script: <'undercloud-install.j2'> -- the name of the jinja template used as the base for the undercloud-install bash script and dev envs hacking. Note, the defaults imply the 'openstack undercloud install' command will be invoked. See the undercloud deployment methods section below for the alternative modes.
undercloud_install_log: <'{{ working_dir }}/undercloud_install.log'> -- the full path to the undercloud install log file.
undercloud_hieradata_override_file: <'hieradata-overrides-classic-undercloud.yaml.j2'> -- the name of jinja template used to override the undercloud's install hieradata. DEPRECATED. Use instead:
hieradata_override_file_classic_undercloud: <hieradata-overrides-classic-undercloud.yaml.j2> -- the source template for hieradata overrides for instack-undercloud deployments.
hieradata_override_file_t_h_t_undercloud: <hieradata-overrides-t-h-t-undercloud.yaml.j2> -- the source template for hieradata overrides for heat driven containerized undercloud deployments.
undercloud_ironic_ipxe_port: <'3816'> -- port to use for httpd ipxe server for ironic deploy
enable_vbmc: <'true'> use a virtual bmc instead of pxe ssh
step_introspect: <'false'> -- boolean value to enable/disable ironic introspection
bash_deploy_ramdisk: <'false'> -- the variable allows older versions of tripleo to upload images properly with the option --old-deploy-image
step_install_undercloud: <'true'> -- turn on/off the undercloud deployment
libvirt_uri: <'qemu:///session'> -- the URI used by libvirt, by default tripleo-quickstart uses user sessions to provide greater flexixiblity to our users. ** additional documentation ** is at https://docs.openstack.org/tripleo-quickstart/latest/accessing-libvirt.html
undercloud_conf_extra: <''> -- extra options to be added to ~/undercloud.conf
undercloud_extra_args: <''> -- extra options for undercloud deploy command.
undercloud_install_cmd: <'openstack undercloud install'> -- command used to install the undercloud
undercloud_install_cli_options: <''> -- extra options for undercloud install command.
undercloud_enable_mistral: <'true'> -- sets up the 'enable_mistral' option in undercloud.conf.
undercloud_enable_monitoring: <'false'> -- sets up the 'enable_monitoring' option in undercloud.conf.
undercloud_enable_telemetry: <'true'> -- sets up the 'enable_telemetry' option in undercloud.conf.
undercloud_enable_tempest: <'true'> -- sets up the 'enable_tempest' option in undercloud.conf.
undercloud_enable_ui: <'true'> -- sets up the 'enable_ui' option in undercloud.conf.
undercloud_enable_validations: <'true'> -- sets up the 'enable_validations' option in undercloud.conf.
undercloud_enable_novajoin: <'false'> -- sets up the 'enable_novajoin' value from undercloud.conf. Note that using 'enable_tls_everywhere' will have the same effect.
novajoin_connect_timeout: <5> Sets vendordata_dynamic_connect_timeout when novajoin is enabled
novajoin_read_timeout: <20> Sets vendordata_dynamic_read_timeout when novajoin is enabled
prepare_novajoin: If set to true, it will install novajoin in the undercloud, and run a script that will create the required privileges/permissions in FreeIPA, as well as the undercloud host entry. this requires 'enable_tls_everywhere' to be set to true, and the following variables to be properly defined: 'freeipa_admin_password', 'freeipa_server_hostname', 'overcloud_cloud_domain', 'undercloud_undercloud_hostname'. If you plan to do this yourself, you can set this variable to false. Defaults to true.
freeipa_admin_password: The password for the admin principal for FreeIPA. This will be used to run the script to prepare FreeIPA for novajoin.
freeipa_server_hostname: The hostname for the FreeIPA server. This will be used to run the script to prepare FreeIPA for novajoin.
overcloud_cloud_domain: The domain configured for use by the overcloud nodes. If TLS everywhere is enabled, this will also be the domain used by FreeIPA. This sets up the 'overcloud_domain_name' configuration option in undercloud.conf . Note: This also affects CloudDomain in the cloud-names.yaml template used by the overcloud-deploy role.
undercloud_cloud_domain: The domain configured for use by containerized undercloud via the tripleo client's --local-domain option. It is unset by default.
tripleo_ui_secure_access: Defaults to false due to the self signed certificate and usability issues. See the tripleo-quickstart documentation accessing the undercloud for details.
local_docker_registry_host: <docker_registry_host> -- registry host/port for containerized undercloud services. Defaults to the value provided for overcloud. You may want to diverge it, if building locally, or fetching from remote registries not fitting the overcloud deployment needs.
undercloud_container_images_file: <""> -- The environment file with default parameters for containers to use with undercloud install CLI. This should only be used to override image prepare generating this during the undercloud install.
undercloud_custom_env_files: -- A space-separate string for custom t-h-t env files for undercloud.conf used with heat installer.
undercloud_undercloud_output_dir: -- allows customize output directory for state, like downloaded ansible configs and processed heat templates for heat installer
undercloud_undercloud_cleanup: -- controls tear down of the processed heat templates
undercloud_upgrade_cleanup: -- controls post upgrade cleanup after we containerize the undercloud.
update_containers: -- whether to update containers from the local registry.
undercloud_enable_tempest: -- The tempest container will be available on the undercloud.
undercloud_roles_data: -- A custom t-h-t roles file. Consumed from undercloud_templates_path or an alternative location as well.
undercloud_selinux_enabled: <'true'> -- Enabled for RHEL by default, Disabled for CentOS by default
undercloud_container_cli: <'docker'> -- Container CLI to use for the Undercloud deployment. Default to 'docker'.

Role Network Variables

undercloud_network_cidr: <'192.168.24.0/24'> -- the network cidr for the undercloud, note this also currently the default cidr used in other CI environments for tripleo.
undercloud_network_gateway: <a 1st host of the undercloud_network_cidr> -- Sets up the undercloud_network_gateway parameter from undercloud.conf.
undercloud_local_ip: <hostvars['undercloud'].undercloud_ip> -- Sets up the local_ip parameter from an inventory. Must be belonging to the undercloud_network_cidr. It is used by overcloud nodes to access the undercloud node via a routable [ctlplane network]((https://docs.openstack.org/developer/tripleo-docs/advanced_deployment/network_isolation). Note that the undercloud.conf takes the default value based on the undercloud_network_cidr instead.
undercloud_undercloud_public_host: <a 2nd host of the undercloud_network_cidr> -- Sets up the 'undercloud_public_host' parameter from undercloud.conf. It is also used by overcloud nodes to access the undercloud node via a VIP/hostname that resolves to a routable IP address.
undercloud_undercloud_admin_host: <a 3rd host of the undercloud_network_cidr> -- Sets up the 'undercloud_admin_host' from undercloud.conf. Note, use the undercloud_admin_vip instead for Mitaka/Newton releases.
undercloud_dhcp_start: <a 5th host of the undercloud_network_cidr> -- Sets up the 'undercloud_dhcp_start' from undercloud.conf.
undercloud_dhcp_end: <a 30th host of the undercloud_network_cidr> -- Sets up the 'undercloud_dhcp_end' from undercloud.conf.
undercloud_undercloud_nameservers: <['8.8.8.8']> -- Sets up the 'undercloud_undercloud_nameservers' from undercloud.conf. May be a string or a sequence. Only the last item goes for the undercloud deploy command.
undercloud_undercloud_hostname: Sets up the 'undercloud_hostname' value from undercloud.conf. Note, use the undercloud_public_vip instead for Mitaka/Newton releases.
undercloud_heat_public_endpoints: <'false'> -- when the ctlplane network is not routable from overcloud nodes, for example pre-provisioned deployed servers, the undercloud deploy --local_ip (and local_ip in the undercloud.conf) may not be used. Enable this variable instead. Doing so changes the heat endpoint type from the default internal to public and changes the signaling method to use TempURLs from OpenStack Object Storage (swift).
undercloud_resource_registry_args: Complements 'resource_registry' for undercloud heat templates. Defaults to nothing.
undercloud_network_environment_args: Complements Undercloud networking setup with the default parameters for heat templates (parameter_defaults).
undercloud_net_config_override: -- a j2 template for os-net-config used to override network configuration, which is normally defined via 'OS::TripleO::Undercloud::Net::SoftwareConfig'. Accepts instack tags like LOCAL_IP et al. When it is defined, the undercloud_resource_registry_args value will be discarded.

Undercloud deployment methods

By default, the undercloud uses openstack undercloud install command, {{working_dir}}/undercloud.conf config and the file coming from the hieradata_override_file_classic_undercloud variable to set the hieradata overrides that will be used for the puppet deployment.

However, there exists more methods for setting up the undercloud based on containers with the openstack undercloud install --use-heat and openstack undercloud deploy commands. Both methods are based on tripleo-heat-templates. The former one provides the instack compatible undercloud.conf format. It may be requested via settings:

undercloud_install_cli_options: --use-heat
undercloud_install_script: undercloud-install.sh.j2

And the latter deployment method is more "free to go". It can be enabled with:

containerized_undercloud: true
undercloud_install_script: undercloud-deploy.sh.j2

For these cases, hiera override data is consumed from hieradata_override_file_t_h_t_undercloud.

Note, the containerized undercloud is a hacking mode for developers, that allows to test containerized components undercloud, with custom, like very minimal, setup layouts. Please do not expect more than that when using it.

To diverge TripleO Heat Templates installation scripts used to deploy/upgrade undercloud from the similar overcloud cases, use the following variables:

  undercloud_composable_scenario: < similarly to composable_scenario for OC >
  undercloud_upgrade_composable_scenario: < similarly to upgrade_composable_scenario for OC >
  undercloud_prep_post_hook_script: < similarly to overcloud_prep_post_hook_script >
  download_undercloud_templates_rpm: < similarly to download_overcloud_templates_rpm >
  undercloud_tht_rpm_url: < similarly to tht_rpm_url for OC >
  undercloud_templates_path: < similarly to overcloud_templates_path >
  undercloud_templates_repo: < similarly to overcloud_templates_repo >
  undercloud_templates_branch: < similarly to overcloud_templates_branch >
  undercloud_templates_refspec: < similarly to overcloud_templates_refspec >

Example Playbook

Sample playbook to call the role

# Deploy the undercloud
- name:  Install undercloud
  hosts: undercloud
  gather_facts: false
  roles:
    - undercloud-deploy

Containerized dev environments (experimental feature)

Firstly, update or create a custom undercloud install script template. It can be found under the locally checked out tripleo-quickstart-extra repo (or at a remote host, if you prefer to apply ansible playbooks from a non local virthost). The template is located by the roles/undercloud-deploy/templates/undercloud-deploy-my-dev.sh.j2 path. Once changes are done, update the undercloud_install_script var, like:

undercloud_install_script: undercloud-deploy-dev.sh.j2

or use the updated template:

undercloud_install_script: undercloud-deploy.sh.j2

Note, it is important to change the default value for the undercloud_install_script to switch from the classic 'install' to the experimental 'deploy' method.

Secondly, you may want to refer an unpackaged t-h-t change refspec or a dev branch. To do so, override the custom t-h-t repo and branch/refspec for t-h-t templates to be fetched, for example:

overcloud_templates_repo: https://github.com/johndoe/tripleo-heat-templates
overcloud_templates_branch: dev

Note, these vars are shared with the overcloud role vars and point to the same templates path, branch/refspec and repo. The templates path should be R/W accessible by the given non_root_user without sudoing. So it is better off using the home dir or tmp dirs with sticky bits.

Also note that you should normaly rely on the openstack-tripleo-heat-templates package. The custom t-h-t repo vars may break that package and should be used with caution.

Note, checkout/install steps for the remaining yet unpackaged custom changes like dev branches for puppet modules, tripleo client, heat agent hooks, need to be covered in the custom undercloud-install.sh script body (rendered from a given in the undercloud_install_script template file name).

The last step is to define the undercloud_extra_args as needed. For example you may want to deploy:

an optional non containerized Octavia,
containerized Keystone,
optional containerized Etcd,

with disabled telemetry, default docker images from docker.io namespace, debug logs for services and puppet, given a decent timeout, and keeping the ephemeral undercloud heat agent running for debug purposes:

undercloud_custom_env_files: >-
  {{undercloud_templates_path}}/environments/disable-telemetry.yaml
  {{undercloud_templates_path}}/environments/docker-minimal.yaml
  {{undercloud_templates_path}}/environments/services/etcd.yaml
  {{undercloud_templates_path}}/environments/services/octavia.yaml
  {{undercloud_templates_path}}/environments/debug.yaml
  {{undercloud_templates_path}}/environments/config-debug.yaml  
undercloud_extra_args: >-
  --timeout 60

Where the t-h-t's environments/docker-minimal.yaml is like:

resource_registry:
  OS::TripleO::Services::Docker: ../puppet/services/docker.yaml
  OS::TripleO::Services::Keystone: ../docker/services/keystone.yaml
  OS::TripleO::PostDeploySteps: ../docker/post.yaml
  OS::TripleO::PostUpgradeSteps: ../docker/post-upgrade.yaml
  OS::TripleO::Services: ../docker/services/services.yaml

parameter_defaults:
  DockerNamespace: tripleomaster
  ComputeServices: {}
  SwiftCeilometerPipelineEnabled: false

Note, this template complements the default t-h-t's environments/docker.yaml setup that deploys everything in containers. The default template for the undercloud-install.sh also provides an additional set of required services used for underlcoud to deploy overclouds (Ironic, Zaqar, MongoDB, Mistral). If you need a lightweight undercloud, make sure your custom undercloud installation script template omits those services and the environments/docker.yaml defaults.

You may also override undercloud_roles_data with a custom roles file (the path must be relative to the t-h-t templates undercloud_templates_path). For the example above, custom undercloud roles may look like:

- name: Undercloud
  CountDefault: 1
  disable_constraints: True
  tags:
    - primary
    - controller
  ServicesDefault:
    - OS::TripleO::Services::Etcd
    - OS::TripleO::Services::Keystone
    - OS::TripleO::Services::OctaviaApi
    - OS::TripleO::Services::OctaviaHealthManager
    - OS::TripleO::Services::OctaviaHousekeeping
    - OS::TripleO::Services::OctaviaWorker

And an example playbook to call the role is:

# Deploy the undercloud
- name:  Deploy undercloud (experimental)
  hosts: undercloud
  gather_facts: false
  vars:
    containerized_undercloud: true
    undercloud_install_script: undercloud-deploy.sh.j2
    overcloud_templates_repo: https://github.com/johndoe/tripleo-heat-templates
    overcloud_templates_branch: dev
    undercloud_custom_env_files: >-
      {{undercloud_templates_path}}/environments/disable-telemetry.yaml
      {{undercloud_templates_path}}/environments/docker-minimal.yaml
      {{undercloud_templates_path}}/environments/services/etcd.yaml
      {{undercloud_templates_path}}/environments/services/octavia.yaml
      {{undercloud_templates_path}}/environments/debug.yaml
      {{undercloud_templates_path}}/environments/config-debug.yaml      
    undercloud_extra_args: >-
      --timeout 60      
  roles:
    - undercloud-deploy

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