577b3e8ef8
Add config options for:
reserved-host-memory:
Memory reserved for host processes, and not used when
calculating capacity for instance allocation.
pci-passthrough-whitelist:
List of PCI devices/vendors to use for direct passthrough
to instances.
vcpu-pin-set:
CPU cores to reserve for host rather than instance usage.
These features are used for hugepage backed VMs, SR-IOV and
CPU pinning in NFV OpenStack deployments running VNF workloads.
Change-Id: I93b2a0e0c568e3129002d0f505d74cf3513a4930
112 lines
3.7 KiB
Markdown
112 lines
3.7 KiB
Markdown
Overview
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========
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This charm provides Nova Compute, the Openstack compute service. It's target
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platform is Ubuntu (preferably LTS) + Openstack.
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Usage
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=====
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The following interfaces are provided:
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- cloud-compute - Used to relate (at least) with one or more of
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nova-cloud-controller, glance, ceph, cinder, mysql, ceilometer-agent,
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rabbitmq-server, neutron
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- nrpe-external-master - Used to generate Nagios checks.
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Database
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========
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Nova compute only requires database access if using nova-network. If using
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Neutron, no direct database access is required and the shared-db relation need
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not be added.
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Networking
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==========
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This charm support nova-network (legacy) and Neutron networking.
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Storage
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=======
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This charm supports a number of different storage backends depending on
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your hypervisor type and storage relations.
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NFV support
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===========
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This charm (in-conjunction with the nova-cloud-controller and neutron-api charms)
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supports use of nova-compute nodes configured for use in Telco NFV deployments;
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specifically the following configuration options (yaml excerpt):
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```yaml
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nova-compute:
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hugepages: 60%
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vcpu-pin-set: "^0,^2"
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reserved-host-memory: 1024
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pci-passthrough-whitelist: {"vendor_id":"1137","product_id":"0071","address":"*:0a:00.*","physical_network":"physnet1"}
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```
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In this example, compute nodes will be configured with 60% of avaliable RAM for
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hugepage use (decreasing memory fragmentation in virual machines, improving
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performance), and Nova will be configured to reserve CPU cores 0 and 2 and
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1024M of RAM for host usage and use the supplied PCI device whitelist as
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PCI devices that as consumable by virtual machines, including any mapping to
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underlying provider network names (used for SR-IOV VF/PF port scheduling with
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Nova and Neutron's SR-IOV support).
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The vcpu-pin-set configuration option is a comma-separated list of physical
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CPU numbers that virtual CPUs can be allocated to by default. Each element
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should be either a single CPU number, a range of CPU numbers, or a caret
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followed by a CPU number to be excluded from a previous range. For example:
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```yaml
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vcpu-pin-set: "4-12,^8,15"
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```
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The pci-passthrough-whitelist configuration must be specified as follows:
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A JSON dictionary which describe a whitelisted PCI device. It should take
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the following format:
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```
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["device_id": "<id>",] ["product_id": "<id>",]
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["address": "[[[[<domain>]:]<bus>]:][<slot>][.[<function>]]" |
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"devname": "PCI Device Name",]
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{"tag": "<tag_value>",}
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```
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where '[' indicates zero or one occurrences, '{' indicates zero or multiple
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occurrences, and '|' mutually exclusive options. Note that any missing
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fields are automatically wildcarded. Valid examples are:
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```
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pci-passthrough-whitelist: {"devname":"eth0", "physical_network":"physnet"}
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pci-passthrough-whitelist: {"address":"*:0a:00.*"}
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pci-passthrough-whitelist: {"address":":0a:00.", "physical_network":"physnet1"}
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pci-passthrough-whitelist: {"vendor_id":"1137", "product_id":"0071"}
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pci-passthrough-whitelist: {"vendor_id":"1137", "product_id":"0071", "address": "0000:0a:00.1", "physical_network":"physnet1"}
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```
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The following is invalid, as it specifies mutually exclusive options:
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```
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pci-passthrough-whitelist: {"devname":"eth0", "physical_network":"physnet", "address":"*:0a:00.*"}
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```
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A JSON list of JSON dictionaries corresponding to the above format. For
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example:
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```
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pci-passthrough-whitelist: [{"product_id":"0001", "vendor_id":"8086"}, {"product_id":"0002", "vendor_id":"8086"}]`
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```
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The [OpenStack advanced networking documentation](http://docs.openstack.org/mitaka/networking-guide/adv-config-sriov.html)
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provides further details on whitelist configuration and how to create instances
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with Neutron ports wired to SR-IOV devices.
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