Variables description

6. Variables description#

6.1. Reserved groups and prefixs#

The following groups are reserved (xxxx means “everything else”):

  • fn_xxxx: these groups are function groups. Variables stored in these groups should start with the specific fn_ prefix.

    • fn_management: this group should contain all manager/controler nodes.

  • hw_xxxx: these groups are hardware groups. Variables stored in these groups should start with the hw_ prefix.

  • os_xxxx: these groups are operating system groups. Variables stored in these groups should start with the os_ prefix.

The following variables are reserved:

  • bb_xxxx: these variables are transverse variables, meaning these can be used by multiple roles and should precedence roles’ default variables.

  • j2_xxxx: these variables are logic variables, meaning these contain Jinja2 code.

Note also that each role’s variables are prefixed by the role name.

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Warning

IMPORTANT: hw_ and os_ variables are not standard. You should NEVER set them outside hardware or os groups. For example, you cannot set the hw_console parameter for a single node under it’s hostvars. If you really need to do that, add more hardware or os groups. If you do not respect this rule, unexpected behavior will happen during configuration deployment.

6.2. Global settings#

  • bb_cluster_name: define cluster name. Default: bluebanquise

  • bb_domain_name: define cluster domain name. Default: cluster.local

  • bb_time_zone: define cluster time zone. Default: Europe/Brussels

6.3. Host settings#

  • bmc: dict that defines an attached BMC to the host, with its name, ip4, mac and attached network.

Example:

c001:
  bmc:
    name: node001-bmc
    ip4: 10.10.103.1
    mac: 08:00:27:0d:44:91
    network: net-admin

  • network_interfaces: list of dicts that defines all network interfaces of the host. Note that order is important. First interface in the list is the resolution (ping) interface, while first in the list linked to an admininstration network (see Network settings) is the ssh/Ansible interface (which can be the same than the resolution interface).

Example:

node001:
  network_interfaces:
    - interface: eth1
      ip4: 10.10.3.1
      mac: 08:00:27:0d:44:90
      network: net-admin
    - interface: eth0
      skip: true
    - interface: ib0
      ip4: 10.20.3.1
      network: interconnect
      type: infiniband

Available settings for each interface are the ones listed in the Ansible nmcli_module. Note that only RHEL and Suse support all these settings. Available settings for Debian and Ubuntu are currently limited in the stack, but can be extended on demand (please open a feature request).

  • alias: add an alias to the host, that will be added in the /etc/hosts file and in the dns server.

  • global_alias: add a global alias not limited to the current iceberg (multiple icebergs mode only).

6.4. Network settings#

Networks are set as a dict (not a list).

The order doesnt matter, but naming follows a specific rule: each network starting with prefix net- is considered an administration network, other networks are considered simple networks. Admininstration networks are used to deploy systems (PXE, DHCP, etc.) and to handle all vital services (DNS, NTP, etc.). Note that most roles take into account if a network is an administration network or not.

For each network, the following parameters are available:

  • prefix: (mandatory) define the prefix of the network.

  • subnet: (mandatory) define the subnet of the network.

  • gateway: define the ip4 gateway of the network if exists.

  • dhcp_server: add this network (and all linked hosts) to the dhcp server (default True).

  • dns_server: add this network (and all linked hosts) to the dns server (default True).

  • shared_network: name of the shared network if exists.

  • services_ip: allows to define all services ip of the network in once, using a single ip for all (meaning a single management hosts for this network).

Example:

networks:
  net-admin:
    prefix: 16
    subnet: 10.10.0.0
    dhcp_server: true
    gateway: 10.10.0.1
    services_ip: 10.10.0.1
  interconnect:
    prefix: 16
    subnet: 10.20.0.0

  • services: allows to define services ip of the network with more capabilities. Each known service takes an hostname and an ip. This can be used for example when services are distributed over multiple management hosts, or when services are using floating virtual ip.

Example:

networks:
  net-admin:
    prefix: 16
    subnet: 10.10.0.0
    services:
      dns:
        - ip4: 10.10.0.2
          hostname: mg2-dns4
        - ip4: 8.8.8.8
          hostname: google-public-dns
      pxe:
        - ip4: 10.10.0.1
          hostname: mg1-pxe
      ntp:
        - ip4: 10.10.0.4
          hostname: mg4-time
  interconnect:
    prefix: 16
    subnet: 10.20.0.0

Note

4 or 6 at end of some keys are related to ipv4 or ipv6, but the ipv6 support is for now limited (if needed, please open a feature request).

6.5. Hardware settings#

  • hw_ipxe_driver: Set ipxe driver to use. Available values: ['default', 'snp', 'snponly']

  • hw_ipxe_platform: Set ipxe platform if need to be fixed. Available values: ['pcbios', 'efi']

  • hw_ipxe_embed: Set ipxe embed BlueBanquise script. Available values: ['standard', 'dhcpretry']

  • hw_console: Set serial console if using a BMC

  • hw_kernel_parameters: Set hardware related kernel parameters (for example, if Kernel crashes with a recent GPU, add nomodeset to this variable.)

  • hw_sysctl: Set hardware sysctl parameters

  • hw_equipment_type: Set equipment type of this hardware. Default is empty. If you need the hardware to be deployed via PXE, you need to set this value to server

  • hw_architecture: Set the architecture of the CPU, if needed by a role. Available values: ['x86_64', 'arm64']

  • hw_specs: Dict. Set hardware specs of the equipment.

Example:

hw_specs:
  cpu:
    cores: 4
    cores_per_socket: 4
    sockets: 1
    threads_per_core: 1
  gpu: None

  • hw_board_authentication: List of dicts. Set board authentication mechanism and needed credentials.

Example:

hw_board_authentication:
  - protocol: IPMI
    user: ADMIN
    password: ADMIN

6.6. OS settings#

  • os_preserve_efi_first_boot_device: Force grub to keep first entry in boot order (EFI systems). Available values: ['true', 'false']

  • os_access_control: Enable or disable access control (SELinux, Apparmor). Available values: ['enforcing', 'permissive', 'disabled']

  • os_firewall: Enable or disable Firewall. Available values: ['true', 'false']

  • os_kernel_parameters: Set OS related kernel parameters.

  • os_sysctl: Set OS sysctl parameters

  • os_keyboard_layout: Set keyboard layout. Default is us.

  • os_system_language: Set system language. Default is en_US.UTF-8 and you should keep it (it simplifies a lot web searchs).

  • os_admin_password_sha512: SHA512 enrcypted password for default admin user. Default is ! wich means no password allowed (keys only).

  • os_admin_ssh_keys: List. List of ssh public keys to install for default admin sudo user.

  • os_partitioning: Raw content of auto installation file on how to partition the disks. WARNING!! If this value is not set, auto partitioning is enabled. Raw content is kickstart partitioning syntax for RHEL like, AutoYast for Suse like, Preseed for Debian like, and Curtin for Ubuntu like.

Example for a raid on RHEL:

os_partitioning: |
  # Partition clearing information
  clearpart --all --initlabel --drives=/dev/disk/by-path/pci-0000:00:11.4-ata-1.0,/dev/disk/by-path/pci-0000:00:11.4-ata-2.0
  # Disk partitioning information
  part raid.01 --ondisk=disk/by-path/pci-0000:00:11.4-ata-1.0 --size=1024
  part raid.02 --ondisk=disk/by-path/pci-0000:00:11.4-ata-1.0 --size=4096
  part raid.03 --ondisk=disk/by-path/pci-0000:00:11.4-ata-1.0 --size=1000 --grow
  part raid.04 --ondisk=disk/by-path/pci-0000:00:11.4-ata-2.0 --size=1024
  part raid.05 --ondisk=disk/by-path/pci-0000:00:11.4-ata-2.0 --size=4096
  part raid.06 --ondisk=disk/by-path/pci-0000:00:11.4-ata-2.0 --size=1000 --grow
  raid /boot --level=1 --device=md0 --fstype=ext4 raid.01 raid.04 --label=BOOT
  raid swap --level=1 --device=md2 --fstype=swap raid.02 raid.05 --label=SWAP
  raid / --level=1 --device=md3 --fstype=ext4 raid.03 raid.06 --label=ROOT

  • os_operating_system: Dict. Define operating system if type is server.

Example:

os_operating_system:
  distribution: ubuntu  # Must be lower
  distribution_major_version: 22
  distribution_version: 22.04

6.7. Repositories#

File group_vars/all/repositories.yml configure repositories to use for all nodes (using groups and variable precedence, repositories can be tuned for each group of nodes, or even each node).

It is important to set correct repositories to avoid issues during deployments.

There are 2 ways to define a repository. Either specifying a full URL and parameters of the repository, or using the stack automatic mechanism (which involves your organized repositories as expected by the stack).

6.7.1. Full definition#

  • RHEL like system:

RHEL , CentOS , RockyLinux , OracleLinux
CloudLinux , AlmaLinux 


repositories:
  - name: os_base
    baseurl: http://my-server/repositories/el8/
    enabled: 1
    state: present

Stack should support all available parameters listed in the Ansible yum_repository_module.

  • Ubuntu or Debian like systems:

Ubuntu , Debian 


repositories:
  - repo: deb http://my-server/repositories/ubuntu22/ stable main
    state: present

Stack should support all available parameters listed in the Ansible apt_repository_module.

  • Suse like system:

Suse 


repositories:
  - name: base
    baseurl: http://my-server/repositories/leap15/
    enabled: 1
    state: present

Stack should support all available parameters listed in the Ansible zypper_repository_module.

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