Synnefo

.. _alloc_disk_templates:

Before upgrading to v0.15 there are three steps that must be performed, relative

to the Cyclades networking service.

Add unique names to the NICs of all Ganeti instances

and refer to them by their name, and not only by their index. Synnefo v0.15

Update Ganeti allocation policy

-------------------------------

Minimum number of NICs

``````````````````````

Until v0.14 all Cyclades VM were forced to be connected to the public network.

Synnefo v0.15 supports dynamic addition and removal of public IPv4 addresses,

which may result in a VM holding no NICs. However, Ganeti's default allocation

policy will not allow instance's without NICs. You will have to override

allocation policy to set the minimum number of NICs to zero. Todo this,

first get the current allocation policy:

.. code-block:: console

 $ gnt-cluster show-ispecs-cmd

 gnt-cluster init --ipolicy-std-specs cpu-count=1,disk-count=1,disk-size=1024,memory-size=128,nic-count=1,spindle-use=1

   --ipolicy-bounds-specs min:cpu-count=1,disk-count=1,disk-size=1024,memory-size=128,nic-count=1,spindle-use=1/max:cpu-count=8,disk-count=16,disk-size=1048576,memory-size=32768,nic-count=8,spindle-use=12

   ganeti1.example.synnefo.org

And replace `min:nic-count=1` with `min:nic-count=0`. Also, set

`max:nic-count=32` to avoid reaching default limit of 8.

.. code-block:: console

 gnt-cluster modify --ipolicy-bounds-specs min:cpu-count=1,disk-count=1,disk-size=1024,memory-size=128,nic-count=0,spindle-use=1/max:cpu-count=8,disk-count=16,disk-size=1048576,memory-size=32768,nic-count=32,spindle-use=12

Enabled and allowed disk templates

``````````````````````````````````

In v0.15, the ``ARCHIPELAGO_BACKENDS`` settings, that was used to seperate

backends that were using Archipelago from the ones that were using all other

disk templates, has been removed. Instead, allocation of instances to Ganeti

backends is based on which disk templates are enabled and allowed in each

Ganeti backend (see section in :ref:`admin guide <alloc_disk_templates>`).

You can see the enabled/allowed disk templates by inspecting

the corresponding fields in `gnt-cluster info` output. For example, to have

a backend holding only instances with archipelago disk templates, you can set

the `--ipolicy-disk-templates` to include only `ext` disk template.

.. code-block:: console

 gnt-cluster modify --ipolicy-disk-templates=ext

2.3 Register pithos view as an OAuth 2.0 client in astakos