Role Variables

• ipsec_psk: the Pre-Shared Key to be used for the IPSEC tunnels. Note that is is sensible information and it’s recommended that it’s stored securely on the host where the playbook runs from, e.g. using Ansible Vault. One can generate this variable with the following command: openssl rand -base64 48

• ipsec_algorithm: Defines the encryption algorithm to use in the phase2alg configuration option for the tunnels. Defaults to: aes_gcm128-null. The possible values should be checked in libreswan’s documentation.

• ipsec_configure_vips: Determines whether or not the role should configure the tunnels for the VIPs. Defaults to: true.

• ipsec_skip_firewall_rules: Determines whether the role should skip or not the firewall rules. Defaults to: false.

• ipsec_uninstall_tunnels: Determines whether the role should remove the IPSEC tunnels that were previously set. Defaults to: false.

• ipsec_upgrade_tunnels: Determines whether the role should upgrade the IPSEC tunnels that were previously set. This means it’ll remove all the tunnels created in a previous run and replace them. Defaults to: false.

• ipsec_setup_resource_agents: Determines whether the role should create the pacemaker resource agents or not. Defaults to: true.

• ipsec_skip_networks: Determines which networks should be skipped. defaults to [].

• ipsec_force_install_legacy: Forces the legacy installation. Defaults to: false.

• overcloud_controller_identifier: This identifies which nodes are controllers in the cluster and which aren’t, and should be part of the hostname of the controller. Defaults to: ‘controller’. It’s highly recommended that there’s a way to explicitly identify the nodes this way. Note that this is only used in the legacy setup.

Example Playbook

Sample:

- hosts: servers
  roles:
     - tripleo-ipsec

Generating an inventory

The script /usr/bin/tripleo-ansible-inventory generates a dynamic inventory with the nodes in the overcloud. And However it comes with some inconveniences:

• In deployments older than Pike, it might be a bit slow to run. To address this, in Ocata and Pike it’s possible to generate a static inventory out of the output of this command:

  /usr/bin/tripleo-ansible-inventory  --static-inventory nodes.txt

  This will create a called nodes.txt with the static inventory, which we could now use and save some time.

• Newton unfortunately only takes into account computes and controllers with this command. So for this deployment we need to generate an inventory of our own. we can do so with the following command:

  cat <<EOF > nodes.txt
  [undercloud]
  localhost
  
  [undercloud:vars]
  ansible_connection = local
  
  [overcloud:vars]
  ansible_ssh_user = heat-admin
  
  [overcloud]
  $( openstack server list -c Networks -f value | sed 's/ctlplane=//')
  EOF

  This assumes that you’re deploying this playbook from the undercloud itself. Hence the undercloud group containing localhost.

Using the dynamic inventory (Queens and beyond)

When using the dynamic inventory, the network names will be based on the names that are set in your network_data.yaml file, from tripleo-heat-templates. As mentioned in tripleo-heat-templates, this file will determine which networks you’re setting up in your overall TripleO deployment, and will even specify which of those networks have VIPs attached to them.

The network names to use in the ipsec_skip_networks variable will be under the name_lower section of each network definition.

For instance, if you want to skip the storage management network, you’ll see that the entry looks as follows:

- name: StorageMgmt
  name_lower: storage_mgmt
  vip: true
  vlan: 40
  ip_subnet: '172.16.3.0/24'
  allocation_pools: [{'start': '172.16.3.4', 'end': '172.16.3.250'}]
  ipv6_subnet: 'fd00:fd00:fd00:4000::/64'
  ipv6_allocation_pools: [{'start': 'fd00:fd00:fd00:4000::10', 'end': 'fd00:fd00:fd00:4000:ffff:ffff:ffff:fffe'}]

So, in this case, the variable you’ll put in your ansible variables file will have the following entry:

ipsec_skip_networks:
- storage_mgmt

You can add more networks by adding more items to that list.

Legacy setups

If you’re using a legacy setup (which would work in Newton), you’ll need to note that the network names are hardcoded; so you’ll have the following options available:

• internalapi

• storage

• storagemgmt

• ctlplane

You can also explicitly skip creating the Redis VIP by adding the redis word to the list.

If you would want to skip the Storage and Storage Management networks, the variable you’ll put in your ansible variables file will have the following entry:

ipsec_skip_networks:
- storage
- storagemgmt