9. Install Compute (nova) on XenServer compute VM¶

This page is based on the following OpenStack Installation Guide pages:

It is also based on some steps from the following guide:

https://www.citrix.com/blogs/2015/11/30/integrating-xenserver-rdo-and-neutron/

All steps have modifications for XenServer.

Download and install pip, and xenapi:

# wget https://bootstrap.pypa.io/get-pip.py
# python get-pip.py
# pip install xenapi

Install nova packages:

# yum install openstack-nova-compute sysfsutils

Configure nova. Replace *HOST_NAME*, *XENSERVER_ROOT*, *CONTROLLER_ADDRESS*, *XAPI_BRIDGE*, *VM_IP*, *NOVA_PASS*, *XENSERVER_IP* and *RABIT_PASS* with your own:

# vim /etc/nova/nova.conf

  [DEFAULT]
  rpc_backend = rabbit
  auth_strategy = keystone
  my_ip = *VM_IP*
  network_api_class = nova.network.neutronv2.api.API
  security_group_api = neutron
  linuxnet_interface_driver = nova.network.linux_net.NeutronLinuxBridgeInterfaceDriver
  firewall_driver = nova.virt.firewall.NoopFirewallDriver
  compute_driver = xenapi.XenAPIDriver
  host = *HOST_NAME*
  live_migration_retry_count=600

  [oslo_messaging_rabbit]
  rabbit_host = controller
  rabbit_userid = openstack
  rabbit_password = *RABBIT_PASS*

  [keystone_authtoken]
  auth_uri = http://controller:5000
  auth_url = http://controller:35357
  auth_plugin = password
  project_domain_id = default
  user_domain_id = default
  project_name = service
  username = nova
  password = *NOVA_PASS*

  [vnc]
  enabled = True
  vncserver_listen = 0.0.0.0
  vncserver_proxyclient_address = *XENSERVER_IP*
  novncproxy_base_url = http://*CONTROLLER_ADDRESS*:6080/vnc_auto.html

  [glance]
  host = controller

  [oslo_concurrency]
  lock_path = /var/lib/nova/tmp

  [xenserver]
  connection_url=http://compute1
  connection_username=root
  connection_password=*XENSERVER_ROOT*
  vif_driver=nova.virt.xenapi.vif.XenAPIOpenVswitchDriver
  ovs_int_bridge=*XAPI_BRIDGE*
  ovs_integration_bridge=*XAPI_BRIDGE*

Download and modify a helper script for installing the dom0 plugins:

# wget --no-check-certificate https://raw.githubusercontent.com/Annie-XIE/summary-os/master/rdo_xenserver_helper.sh
# sed -i 's/dom0_ip=169.254.0.1/dom0_ip=compute1/g' rdo_xenserver_helper.sh

Use the script to install the dom0 nova plugins:

# source rdo_xenserver_helper.sh
# install_dom0_plugins

Answer yes to the RSA key prompt
Enter the XenServer root password when prompted (twice)
Ignore the errors related to the neutron plugins

Update the LVM configuration to prevent scanning of instances’ contents:
```
# vim /etc/lvm/lvm.conf

  devices {
     ...
     filter = ["r/.*/"]
```

Note: Do not replace the entire “devices” section, only the “filter” line.

Enable and start the nova services:

# systemctl enable openstack-nova-compute.service
# systemctl start openstack-nova-compute.service

Log on to the controller node as root.
Load the “admin” credential file:
```
# source admin-openrc.sh
```

Check the nova service list:

# nova service-list

  +----+------------------+---------------------------------------------+----------+---------+-------+----------------------------+-----------------+
  | Id | Binary           | Host                                        | Zone     | Status  | State | Updated_at                 | Disabled Reason |
  +----+------------------+---------------------------------------------+----------+---------+-------+----------------------------+-----------------+
  | 1  | nova-consoleauth | controller.openstack.lab.eco.rackspace.com  | internal | enabled | up    | 2016-02-08T16:53:19.000000 | -               |
  | 2  | nova-scheduler   | controller.openstack.lab.eco.rackspace.com  | internal | enabled | up    | 2016-02-08T16:53:19.000000 | -               |
  | 3  | nova-conductor   | controller.openstack.lab.eco.rackspace.com  | internal | enabled | up    | 2016-02-08T16:53:22.000000 | -               |
  | 4  | nova-cert        | controller.openstack.lab.eco.rackspace.com  | internal | enabled | up    | 2016-02-08T16:53:27.000000 | -               |
  | 5  | nova-compute     | compute1-vm.openstack.lab.eco.rackspace.com | nova     | enabled | up    | 2016-02-08T16:53:19.000000 | -               |
  +----+------------------+---------------------------------------------+----------+---------+-------+----------------------------+-----------------+

The list should include compute1-vm running nova-compute.

Check the nova endpoints list:

# nova endpoints

  WARNING: nova has no endpoint in ! Available endpoints for this service:
  +-----------+------------------------------------------------------------+
  | nova      | Value                                                      |
  +-----------+------------------------------------------------------------+
  | id        | 1c07bba299254336abd0cbe27c64be83                           |
  | interface | internal                                                   |
  | region    | RegionOne                                                  |
  | region_id | RegionOne                                                  |
  | url       | http://controller:8774/v2/76f8c8fd7b1e407d97c4604eb2a408b3 |
  +-----------+------------------------------------------------------------+
  +-----------+------------------------------------------------------------+
  | nova      | Value                                                      |
  +-----------+------------------------------------------------------------+
  | id        | 221f3238f2da46fb8fc6897e6c2c4de1                           |
  | interface | public                                                     |
  | region    | RegionOne                                                  |
  | region_id | RegionOne                                                  |
  | url       | http://controller:8774/v2/76f8c8fd7b1e407d97c4604eb2a408b3 |
  +-----------+------------------------------------------------------------+
  +-----------+------------------------------------------------------------+
  | nova      | Value                                                      |
  +-----------+------------------------------------------------------------+
  | id        | fdbd2fe1dda5460aaa486b5d142f99aa                           |
  | interface | admin                                                      |
  | region    | RegionOne                                                  |
  | region_id | RegionOne                                                  |
  | url       | http://controller:8774/v2/76f8c8fd7b1e407d97c4604eb2a408b3 |
  +-----------+------------------------------------------------------------+
  WARNING: keystone has no endpoint in ! Available endpoints for this service:
  +-----------+----------------------------------+
  | keystone  | Value                            |
  +-----------+----------------------------------+
  | id        | 33c74602793e454ea1d9ae9ab6ca5dcc |
  | interface | public                           |
  | region    | RegionOne                        |
  | region_id | RegionOne                        |
  | url       | http://controller:5000/v2.0      |
  +-----------+----------------------------------+
  +-----------+----------------------------------+
  | keystone  | Value                            |
  +-----------+----------------------------------+
  | id        | 688939b258ea4f1d956cb85dfc75e0c0 |
  | interface | internal                         |
  | region    | RegionOne                        |
  | region_id | RegionOne                        |
  | url       | http://controller:5000/v2.0      |
  +-----------+----------------------------------+
  +-----------+----------------------------------+
  | keystone  | Value                            |
  +-----------+----------------------------------+
  | id        | 7c7652f07b2f4a2c8bf805ff49b6a4eb |
  | interface | admin                            |
  | region    | RegionOne                        |
  | region_id | RegionOne                        |
  | url       | http://controller:35357/v2.0     |
  +-----------+----------------------------------+
  WARNING: glance has no endpoint in ! Available endpoints for this service:
  +-----------+----------------------------------+
  | glance    | Value                            |
  +-----------+----------------------------------+
  | id        | 0d49d35fc21d4faa8c72ff3578198513 |
  | interface | internal                         |
  | region    | RegionOne                        |
  | region_id | RegionOne                        |
  | url       | http://controller:9292           |
  +-----------+----------------------------------+
  +-----------+----------------------------------+
  | glance    | Value                            |
  +-----------+----------------------------------+
  | id        | 54f519365b8e4f7f81b750fdbf55be2f |
  | interface | public                           |
  | region    | RegionOne                        |
  | region_id | RegionOne                        |
  | url       | http://controller:9292           |
  +-----------+----------------------------------+
  +-----------+----------------------------------+
  | glance    | Value                            |
  +-----------+----------------------------------+
  | id        | d5e7d60a0eba46b9ac7b992214809fe0 |
  | interface | admin                            |
  | region    | RegionOne                        |
  | region_id | RegionOne                        |
  | url       | http://controller:9292           |
  +-----------+----------------------------------+

The list should include endpoints for nova, keystone, and glance. Ignore any warnings.

Check the nova image list:

# nova image-list

  +--------------------------------------+----------------+--------+--------------------------------------+
  | ID                                   | Name           | Status | Server                               |
  | 1e710e0c-0fb6-4425-b196-4b66bfac495e | cirros-xen     | ACTIVE |                                      |
  +--------------------------------------+----------------+--------+--------------------------------------+

The list should include the cirros-xen image previously uploaded.