OpenStack Compute, codenamed Nova, is a cloud computing fabric controller. In
addition to its "native" API (the OpenStack API), it also supports the Amazon
EC2 API.
.
This charm provides the Nova Compute hypervisor service and should be deployed
directly to physical servers.

Overview

This charm provides Nova Compute, the Openstack compute service. It's target
platform is Ubuntu (preferably LTS) + Openstack.

Usage

The following interfaces are provided:

  • cloud-compute - Used to relate (at least) with one or more of
    nova-cloud-controller, glance, ceph, cinder, mysql, ceilometer-agent,
    rabbitmq-server, neutron

  • nrpe-external-master - Used to generate Nagios checks.

Database

Nova compute only requires database access if using nova-network. If using
Neutron, no direct database access is required and the shared-db relation need
not be added.

Networking

This charm support nova-network (legacy) and Neutron networking.

Storage

This charm supports a number of different storage backends depending on
your hypervisor type and storage relations.

Deploying from source

The minimum openstack-origin-git config required to deploy from source is:

openstack-origin-git: include-file://nova-juno.yaml

nova-juno.yaml
    repositories:
    - {name: requirements,
       repository: 'git://github.com/openstack/requirements',
       branch: stable/juno}
    - {name: nova,
       repository: 'git://github.com/openstack/nova',
       branch: stable/juno}

Note that there are only two 'name' values the charm knows about: 'requirements'
and 'nova'. These repositories must correspond to these 'name' values.
Additionally, the requirements repository must be specified first and the
nova repository must be specified last. All other repostories are installed
in the order in which they are specified.

The following is a full list of current tip repos (may not be up-to-date):

openstack-origin-git: include-file://nova-master.yaml

nova-master.yaml
    repositories:
    - {name: requirements,
       repository: 'git://github.com/openstack/requirements',
       branch: master}
    - {name: oslo-concurrency,
       repository: 'git://github.com/openstack/oslo.concurrency',
       branch: master}
    - {name: oslo-config,
       repository: 'git://github.com/openstack/oslo.config',
       branch: master}
    - {name: oslo-context,
       repository: 'git://github.com/openstack/oslo.context',
       branch: master}
    - {name: oslo-db,
       repository: 'git://github.com/openstack/oslo.db',
       branch: master}
    - {name: oslo-i18n,
       repository: 'git://github.com/openstack/oslo.i18n',
       branch: master}
    - {name: oslo-log,
       repository: 'git://github.com/openstack/oslo.log',
       branch: master}
    - {name: oslo-messaging,
       repository: 'git://github.com/openstack/oslo.messaging',
       branch: master}
    - {name: oslo-middleware,
       repository': 'git://github.com/openstack/oslo.middleware',
       branch: master}
    - {name: oslo-rootwrap',
       repository: 'git://github.com/openstack/oslo.rootwrap',
       branch: master}
    - {name: oslo-serialization,
       repository: 'git://github.com/openstack/oslo.serialization',
       branch: master}
    - {name: oslo-utils,
       repository: 'git://github.com/openstack/oslo.utils',
       branch: master}
    - {name: pbr,
       repository: 'git://github.com/openstack-dev/pbr',
       branch: master}
    - {name: stevedore,
       repository: 'git://github.com/openstack/stevedore',
       branch: 'master'}
    - {name: sqlalchemy-migrate,
       repository: 'git://github.com/stackforge/sqlalchemy-migrate',
       branch: master}
    - {name: python-cinderclient,
       repository: 'git://github.com/openstack/python-cinderclient',
       branch: master}
    - {name: python-glanceclient,
       repository': 'git://github.com/openstack/python-glanceclient',
       branch: master}
    - {name: python-neutronlient,
       repository': 'git://github.com/openstack/python-neutronclient',
       branch: master}
    - {name: keystonemiddleware,
       repository: 'git://github.com/openstack/keystonemiddleware',
       branch: master}
    - {name: nova,
       repository: 'git://github.com/openstack/nova',
       branch: master}

Configuration

sysctl
(string)
                            YAML formatted associative array of sysctl values, e.g.:
'{ kernel.pid_max : 4194303 }'

                        
verbose
(boolean)
                            Enable verbose logging.
                        
bridge-interface
(string)
                            Bridge interface to be configured
                        
br100
cpu-mode
(string)
                            Set to 'host-model' to clone the host CPU feature flags; to 
'host-passthrough' to use the host CPU model exactly; to 'custom' to 
use a named CPU model; to 'none' to not set any CPU model. If 
virt_type='kvm|qemu', it will default to 'host-model', otherwise it will 
default to 'none'.  Defaults to 'host-passthrough' for ppc64el, ppc64le
if no value is set.

                        
authorized-keys-path
(string)
                            Only used when migration-auth-type is set to ssh.
.
Full path to authorized_keys file, can be useful for systems with
non-default AuthorizedKeysFile location. It will be formatted using the
following variables:
.
  homedir - user's home directory
  username - username
.

                        
{homedir}/.ssh/authorized_keys
flat-interface
(string)
                            Network interface on which to build bridge
                        
eth1
nova-config
(string)
                            Full path to Nova configuration file.
                        
/etc/nova/nova.conf
virt-type
(string)
                            Virtualization flavor. Supported flavors are: kvm, xen, uml, lxc, qemu,
lxd.

                        
kvm
use-syslog
(boolean)
                            Setting this to True will allow supporting services to log to syslog.

                        
bridge-netmask
(string)
                            Netmask to be assigned to bridge interface
                        
255.255.255.0
libvirt-image-backend
(string)
                            Tell Nova which libvirt image backend to use. Supported backends are rbd,
lvm and qcow2. If no backend is specified, the Nova default (qcow2) is
used. Note that rbd imagebackend is only supported with >= Juno.

                        
config-flags
(string)
                            Comma-separated list of key=value config flags. These values will be
placed in the nova.conf [DEFAULT] section.

                        
rabbit-user
(string)
                            Username used to access rabbitmq queue.
                        
nova
bridge-ip
(string)
                            IP to be assigned to bridge interface
                        
11.0.0.1
disk-cachemodes
(string)
                            Specific cachemodes to use for different disk types e.g:
file=directsync,block=none

                        
prefer-ipv6
(boolean)
                            If True enables IPv6 support. The charm will expect network interfaces
to be configured with an IPv6 address. If set to False (default) IPv4
is expected.

NOTE: these charms do not currently support IPv6 privacy extension. In
order for this charm to function correctly, the privacy extension must be
disabled and a non-temporary address must be configured/available on
your network interface.

                        
nagios_servicegroups
(string)
                            A comma-separated list of nagios servicegroups. If left empty, the
nagios_context will be used as the servicegroup.

                        
enable-resize
(boolean)
                            Enable instance resizing, which requires that passwordless SSH access be setup between compute hosts.
                        
enable-live-migration
(boolean)
                            Configure libvirt for live migration.
                        
action-managed-upgrade
(boolean)
                            If True enables openstack upgrades for this charm via juju actions.
You will still need to set openstack-origin to the new repository but
instead of an upgrade running automatically across all units, it will
wait for you to execute the openstack-upgrade action for this charm on
each unit. If False it will revert to existing behavior of upgrading
all units on config change.

                        
openstack-origin
(string)
                            Repository from which to install.  May be one of the following:
distro (default), ppa:somecustom/ppa, a deb url sources entry or a
supported Ubuntu Cloud Archive (UCA) release pocket.
.
Supported UCA sources include:
.
cloud:<series>-<openstack-release>
cloud:<series>-<openstack-release>/updates
cloud:<series>-<openstack-release>/staging
cloud:<series>-<openstack-release>/proposed
.
For series=Precise we support UCA for openstack-release=
   * icehouse
.
For series=Trusty we support UCA for openstack-release=
   * juno
   * kilo
   * ...
.
NOTE: updating this setting to a source that is known to provide
a later version of OpenStack will trigger a software upgrade.
.
NOTE: when openstack-origin-git is specified, openstack specific
packages will be installed from source rather than from the
openstack-origin repository.

                        
distro
use-internal-endpoints
(boolean)
                            Openstack mostly defaults to using public endpoints for
internal communication between services. If set to True this option will
configure services to use internal endpoints where possible.

                        
multi-host
(string)
                            Whether to run nova-api and nova-network on the compute nodes.
                        
yes
manage-neutron-plugin-legacy-mode
(boolean)
                            If True nova-compute will install neutron packages for the plugin
stipulated by nova-cloud-controller. The option is only available for
backward compatibility for deployments which do not use the neutron-api
charm. Please do not enable this on new deployments.

                        
True
migration-auth-type
(string)
                            TCP authentication scheme for libvirt live migration.  Available options
include ssh.

                        
ceph-osd-replication-count
(int)
                            This value dictates the number of replicas ceph must make of any
object it stores withing the nova rbd pool. Of course, this only
applies if using Ceph as a backend store. Note that once the nova
rbd pool has been created, changing this value will not have any
effect (although it can be changed in ceph by manually configuring
your ceph cluster).

                        
3
instances-path
(string)
                            Path used for storing Nova instances data - empty means default of
/var/lib/nova/instances.

                        
database
(string)
                            Nova database name.
                        
nova
openstack-origin-git
(string)
                            Specifies a YAML-formatted dictionary listing the git repositories and
branches from which to install OpenStack and its dependencies.
.
Note that the installed config files will be determined based on
the OpenStack release of the openstack-origin option.
.
For more details see README.md.

                        
rbd-client-cache
(string)
                            Enable/disable rbd client cache. Leaving this value unset will result in
default Ceph rbd client settings being used (rbd cache is enabled by
default for Ceph >= Giant). Supported values here are "enabled" or
"disabled".

                        
nagios_context
(string)
                            Used by the nrpe-external-master subordinate charm. A string that will be
prepended to instance name to set the host name in nagios. So for
instance the hostname would be something like:
.
  juju-myservice-0
.
If you're running multiple environments with the same services in them
this allows you to differentiate between them.

                        
juju
hugepages
(string)
                            The pecentage of system memory to use for hugepages eg '10%' or the total
number of 2M hugepages - eg "1024".
For a systemd system (wily and later) the prefered approach is to enable
hugepages via kernel parameters set in MAAS and systemd will mount them
automatically.

                        
rbd-pool
(string)
                            RBD pool to use with Nova libvirt RBDImageBackend. Only required when you
have libvirt-image-backend set to 'rbd'.

                        
nova
harden
(string)
                            Apply system hardening. Supports a space-delimited list of modules
to run. Supported modules currently include os, ssh, apache and mysql.

                        
rabbit-vhost
(string)
                            Rabbitmq vhost.
                        
openstack
cpu-model
(string)
                            Set to a named libvirt CPU model (see names listed in 
/usr/share/libvirt/cpu_map.xml). Only has effect if cpu_mode='custom' and 
virt_type='kvm|qemu'.

                        
debug
(boolean)
                            Enable debug logging.
                        
database-user
(string)
                            Username for database access.
                        
nova