19. Install Compute (nova) on KVM Host¶

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

Install nova packages:

# yum install openstack-nova-compute sysfsutils

Format and mount the second array for instance storage:

# parted -s -- /dev/sdb mklabel gpt
# parted -s -a optimal -- /dev/sdb mkpart primary 2048s -1
# parted -s -- /dev/sdb align-check optimal 1
# parted /dev/sdb set 1 lvm on
# parted /dev/sdb unit s print
# mkfs.xfs /dev/sdb1
# mount /dev/sdb1 /var/lib/nova/instances
# tail -1 /etc/mtab >> /etc/fstab
# chown nova:nova /var/lib/nova/instances

Update the LVM configuration to prevent scanning of instances’ contents:

# vim /etc/lvm/lvm.conf

  devices {
     ...
     filter = [ "a/sda/", "a/sdb/", "r/.*/"]

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

Configure nova. Replace *SERVER_IP*, *RABBIT_PASS*, *NOVA_PASS* and *CONTROLLER_ADDRESS* with your own:

# vim /etc/nova/nova.conf

  [DEFAULT]
  rpc_backend = rabbit
  auth_strategy = keystone
  my_ip = *SERVER_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

  [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 = $my_ip
  novncproxy_base_url = http://*CONTROLLER_ADDRESS*:6080/vnc_auto.html

  [glance]
  host = controller

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

  [libvirt]
  virt_type = kvm

Enable and start the nova and libvirt services:

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

Log on to the control 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    | 2016-02-09T17:19:38.000000 | -               |
  | 2  | nova-scheduler   | controller.openstack.lab.eco.rackspace.com  | internal | enabled | up    | 2016-02-09T17:19:41.000000 | -               |
  | 3  | nova-conductor   | controller.openstack.lab.eco.rackspace.com  | internal | enabled | up    | 2016-02-09T17:19:41.000000 | -               |
  | 4  | nova-cert        | controller.openstack.lab.eco.rackspace.com  | internal | enabled | up    | 2016-02-09T17:19:38.000000 | -               |
  | 5  | nova-compute     | compute1-vm.openstack.lab.eco.rackspace.com | nova     | enabled | up    | 2016-02-09T17:19:39.000000 | -               |
  | 6  | nova-compute     | compute2.openstack.lab.eco.rackspace.com    | nova     | enabled | up    | 2016-02-09T17:19:36.000000 | -               |
  +----+------------------+---------------------------------------------+----------+---------+-------+----------------------------+-----------------+

The list should include compute1-vm and compute2 running nova-compute.