Synnefo » snf-ganeti

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As for 2.1 and 2.2 we divide the 2.3 design into three areas:

- core changes, which affect the master daemon/job queue/locking or

- external interface changes (e.g. command line, os api, hooks, ...)

Core changes

Job priorities

Current state and shortcomings

.. TODO: Describe current situation

Proposed changes

.. TODO: Describe changes to job queue and potentially client programs

Worker pool

To support job priorities in the job queue, the worker pool underlying

the job queue must be enhanced to support task priorities. Currently

priorities.

IPv6 support

Currently Ganeti does not support IPv6. This is true for nodes as well

as instances. Due to the fact that IPv4 exhaustion is threateningly near

bigger clusters are supported.

Supported IPv6 setup

In Ganeti 2.3 we introduce additionally to the ordinary pure IPv4

setup a hybrid IPv6/IPv4 mode. The latter works as follows:

boundaries.

netutils: Utilities for handling common network tasks

Currently common util functions are kept in the utils modules. Since

this module grows bigger and bigger network-related functions are moved

will be IPv6-enabled.

Cluster initialization

As mentioned above there will be two different setups in terms of IP

addressing: pure IPv4 and hybrid IPv6/IPv4 address. To choose that a

new cluster init parameter *--primary-ip-version* is introduced. This is

needed as a given name can resolve to both an IPv4 and IPv6 address on a

Once a cluster is initialized and the primary IP version chosen all

nodes that join have to conform to that setup. In the case of our

daemon listening on network sockets to the IPv6 address.

Node addition

When adding a new node to a IPv6/IPv4 cluster it must have a IPv6

address to be used as primary and a IPv4 address used as secondary. As

the correct address needs to be passed to it.

Name resolution

Since the gethostbyname*() functions do not support IPv6 name resolution

will be done by using the recommended getaddrinfo().

IPv4-only components

============================  ===================  ====================

Component                     IPv6 Status          Planned Version

Feature changes

External interface changes

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