009fd0f35b
We're going to remove all the code, but first, remove the docs. Part of blueprint remove-consoleauth Change-Id: Ie96e18ea7762b93b4116b35d7ebcfcbe53c55527 Signed-off-by: Stephen Finucane <sfinucan@redhat.com>
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System administration
manage-users.rst manage-volumes.rst flavors.rst default-ports.rst admin-password-injection.rst manage-the-cloud.rst manage-logs.rst root-wrap-reference.rst configuring-migrations.rst live-migration-usage.rst remote-console-access.rst service-groups.rst node-down.rst adv-config.rst
To effectively administer compute, you must understand how the different installed nodes interact with each other. Compute can be installed in many different ways using multiple servers, but generally multiple compute nodes control the virtual servers and a cloud controller node contains the remaining Compute services.
The Compute cloud works using a series of daemon processes named
nova-* that exist persistently on the host machine. These
binaries can all run on the same machine or be spread out on multiple
boxes in a large deployment. The responsibilities of services and
drivers are:
Services
nova-api-
Receives XML requests and sends them to the rest of the system. A WSGI app routes and authenticates requests. Supports the OpenStack Compute APIs. A
nova.confconfiguration file is created when Compute is installed. nova-compute-
Manages virtual machines. Loads a Service object, and exposes the public methods on ComputeManager through a Remote Procedure Call (RPC).
nova-conductor-
Provides database-access support for compute nodes (thereby reducing security risks).
nova-objectstore-
A simple file-based storage system for images that replicates most of the S3 API. It can be replaced with OpenStack Image service and either a simple image manager or OpenStack Object Storage as the virtual machine image storage facility. It must exist on the same node as
nova-compute. nova-network-
Manages floating and fixed IPs, DHCP, bridging and VLANs. Loads a Service object which exposes the public methods on one of the subclasses of NetworkManager. Different networking strategies are available by changing the
network_managerconfiguration option toFlatManager,FlatDHCPManager, orVLANManager(defaults toVLANManagerif nothing is specified).14.0.0
nova-networkwas deprecated in the OpenStack Newton release. nova-scheduler-
Dispatches requests for new virtual machines to the correct node.
nova-novncproxy-
Provides a VNC proxy for browsers, allowing VNC consoles to access virtual machines.
Note
Some services have drivers that change how the service implements its
core functionality. For example, the nova-compute service
supports drivers that let you choose which hypervisor type it can use.
nova-network and nova-scheduler also have
drivers.