153 lines
5.2 KiB
Markdown
153 lines
5.2 KiB
Markdown
Overview
|
|
========
|
|
|
|
This charm provides Nova Compute, the OpenStack compute service. Its 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.
|
|
|
|
In order to have cinder ceph rbd support for Openstack Ocata and newer
|
|
releases, ceph-access relation must be added to cinder-ceph to allow
|
|
nova-compute units to communicate with multiple ceph backends using
|
|
different cephx keys and user names.
|
|
|
|
$ juju add-relation nova-compute cinder-ceph
|
|
|
|
See LP Bug [#1671422](https://bugs.launchpad.net/charm-cinder-ceph/+bug/1671422)
|
|
for more information.
|
|
|
|
Availability Zones
|
|
==================
|
|
|
|
There are two options to provide default_availability_zone config
|
|
for nova nodes:
|
|
|
|
- default-availability-zone
|
|
- customize-failure-domain
|
|
|
|
The order of precedence is as follows:
|
|
|
|
1. Information from a Juju provider (JUJU_AVAILABILITY_ZONE)
|
|
if customize-failure-domain is set to True and Juju
|
|
has set the JUJU_AVAILABILITY_ZONE to a non-empty value;
|
|
2. The value of default-availability-zone will be used
|
|
if customize-failure-domain is set to True but no
|
|
JUJU_AVAILABILITY_ZONE is provided via hook
|
|
context by the Juju provider;
|
|
3. Otherwise, the value of default-availability-zone
|
|
charm option will be used.
|
|
|
|
The default_availability_zone in Nova affects scheduling if a
|
|
given Nova node was not placed into an aggregate with an
|
|
availability zone present as a property by an operator. Using
|
|
customize-failure-domain is recommended as it provides AZ-aware
|
|
scheduling out of the box if an operator specifies an AZ during
|
|
instance creation.
|
|
|
|
These options also affect the AZ propagated down to networking
|
|
subordinates which is useful for AZ-aware Neutron agent scheduling.
|
|
|
|
NFV support
|
|
===========
|
|
|
|
This charm (in conjunction with the nova-cloud-controller and neutron-api charms)
|
|
supports use of nova-compute nodes configured for use in Telco NFV deployments;
|
|
specifically the following configuration options (yaml excerpt):
|
|
|
|
```yaml
|
|
nova-compute:
|
|
hugepages: 60%
|
|
vcpu-pin-set: "^0,^2"
|
|
reserved-host-memory: 1024
|
|
pci-passthrough-whitelist: {"vendor_id":"1137","product_id":"0071","address":"*:0a:00.*","physical_network":"physnet1"}
|
|
```
|
|
|
|
In this example, compute nodes will be configured with 60% of available RAM for
|
|
hugepage use (decreasing memory fragmentation in virtual machines, improving
|
|
performance), and Nova will be configured to reserve CPU cores 0 and 2 and
|
|
1024M of RAM for host usage and use the supplied PCI device whitelist as
|
|
PCI devices that as consumable by virtual machines, including any mapping to
|
|
underlying provider network names (used for SR-IOV VF/PF port scheduling with
|
|
Nova and Neutron's SR-IOV support).
|
|
|
|
The vcpu-pin-set configuration option is a comma-separated list of physical
|
|
CPU numbers that virtual CPUs can be allocated to by default. Each element
|
|
should be either a single CPU number, a range of CPU numbers, or a caret
|
|
followed by a CPU number to be excluded from a previous range. For example:
|
|
|
|
```yaml
|
|
vcpu-pin-set: "4-12,^8,15"
|
|
```
|
|
|
|
The pci-passthrough-whitelist configuration must be specified as follows:
|
|
|
|
A JSON dictionary which describe a whitelisted PCI device. It should take
|
|
the following format:
|
|
|
|
```
|
|
["device_id": "<id>",] ["product_id": "<id>",]
|
|
["address": "[[[[<domain>]:]<bus>]:][<slot>][.[<function>]]" |
|
|
"devname": "PCI Device Name",]
|
|
{"tag": "<tag_value>",}
|
|
```
|
|
|
|
where '[' indicates zero or one occurrences, '{' indicates zero or multiple
|
|
occurrences, and '|' mutually exclusive options. Note that any missing
|
|
fields are automatically wildcarded. Valid examples are:
|
|
|
|
```
|
|
pci-passthrough-whitelist: {"devname":"eth0", "physical_network":"physnet"}
|
|
|
|
pci-passthrough-whitelist: {"address":"*:0a:00.*"}
|
|
|
|
pci-passthrough-whitelist: {"address":":0a:00.", "physical_network":"physnet1"}
|
|
|
|
pci-passthrough-whitelist: {"vendor_id":"1137", "product_id":"0071"}
|
|
|
|
pci-passthrough-whitelist: {"vendor_id":"1137", "product_id":"0071", "address": "0000:0a:00.1", "physical_network":"physnet1"}
|
|
```
|
|
|
|
The following is invalid, as it specifies mutually exclusive options:
|
|
|
|
```
|
|
pci-passthrough-whitelist: {"devname":"eth0", "physical_network":"physnet", "address":"*:0a:00.*"}
|
|
```
|
|
|
|
A JSON list of JSON dictionaries corresponding to the above format. For
|
|
example:
|
|
|
|
```
|
|
pci-passthrough-whitelist: [{"product_id":"0001", "vendor_id":"8086"}, {"product_id":"0002", "vendor_id":"8086"}]`
|
|
```
|
|
|
|
The [OpenStack advanced networking documentation](http://docs.openstack.org/mitaka/networking-guide/adv-config-sriov.html)
|
|
provides further details on whitelist configuration and how to create instances
|
|
with Neutron ports wired to SR-IOV devices.
|