Add support for a seed host

The host uses the devicemapper docker storage driver, and the all-in-one
network interface is breth1, as for the controller.

Story: 2001655
Task: 6683

etc/kayobe/docker.yml

@@ -4,9 +4,8 @@
 
 # Name of the docker storage driver. Supported values include 'devicemapper'
 # and 'overlay'.
+# NOTE: This is configured in group_vars for the seed and overcloud groups.
 #docker_storage_driver:
-# Use the overlay docker storage driver as it doesn't require LVM.
-docker_storage_driver: overlay
 
 # Name of the docker storage LVM volume group.
 #docker_storage_volume_group:

etc/kayobe/inventory/group_vars/overcloud/docker

@@ -0,0 +1,3 @@
+---
+# Use the overlay docker storage driver as it doesn't require LVM.
+docker_storage_driver: overlay

etc/kayobe/inventory/group_vars/seed/docker

@@ -0,0 +1,7 @@
+---
+# Don't use the overlay driver as it doesn't work with the ansible template
+# module until ansible 2.4.0.
+docker_storage_driver: devicemapper
+
+# Size of the docker storage data LVM volume (see lvol module size argument).
+docker_storage_volume_thinpool_size: 45%VG

etc/kayobe/inventory/group_vars/seed/network-interfaces

@@ -2,35 +2,10 @@
 ###############################################################################
 # Network interface definitions for the seed group.
 
-# Overcloud provisioning network IP information.
-# provision_oc_net_interface:
-# provision_oc_net_bridge_ports:
-# provision_oc_net_bond_slaves:
-
-# Workload provisioning network IP information.
-# provision_wl_net_interface:
-# provision_wl_net_bridge_ports:
-# provision_wl_net_bond_slaves:
-
-# Internal network IP information.
-# internal_net_interface:
-# internal_net_bridge_ports:
-# internal_net_bond_slaves:
-
-# External network IP information.
-# external_net_interface:
-# external_net_bridge_ports:
-# external_net_bond_slaves:
-
-# Storage network IP information.
-# storage_net_interface:
-# storage_net_bridge_ports:
-# storage_net_bond_slaves:
-
-# Storage management network IP information.
-# storage_mgmt_net_interface:
-# storage_mgmt_net_bridge_ports:
-# storage_mgmt_net_bond_slaves:
+# Seed interface on all-in-one network.
+aio_interface: breth1
+# Use eth1 if it exists, otherwise the bridge will have no ports.
+aio_bridge_ports: "{{ ['eth1'] if 'ansible_eth1' in hostvars[inventory_hostname] else [] }}"
 
 ###############################################################################
 # Dummy variable to allow Ansible to accept this file.

etc/kayobe/inventory/hosts

@@ -1,5 +1,8 @@
 [config-mgmt]
 localhost ansible_connection=local
 
+[seed]
+seed
+
 [controllers]
 controller0

etc/kayobe/network-allocation.yml

@@ -1,2 +1,3 @@
 aio_ips:
   controller0: 192.168.33.3
+  seed: 192.168.33.5

etc/kayobe/seed.yml

@@ -47,6 +47,7 @@
 
 # Size of docker volumes LVM backing volume.
 #seed_lvm_group_data_lv_docker_volumes_size:
+seed_lvm_group_data_lv_docker_volumes_size: 50%VG
 
 # Filesystem for docker volumes LVM backing volume. ext4 allows for shrinking.
 #seed_lvm_group_data_lv_docker_volumes_fs: