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Commit #c172f4a used the "size" attribute of images. This commit
fixes mocked images of tests to contain this attribute.

Update Cyclades, to pass as 'img_id' the hashmap('checksum') of the
image, instead of the location URL. In that way, snf-image does not any
access to the Pithos database.

In case hotplug is disabled, via GANETI_USE_HOTPLUG setting, network
actions should be allowed only on STOPPED vms. This commit adds this
check and a unittest for this case. Also it makes some other checks
regarding actions and states of vms more strict.

Finally, this commit changes the default value of GANETI_USE_HOTPLUG to
True.

Remove firewall tag from ganeti instance when disconnecting them from
networks. Until now, this was not needed because a vm could not be
disconnected from public networks. Since floating IPs, a vm may be
dynamically be connected and disconnected to public networks, and so a
hanging firewall tag may affect another NIC.

Import settings from django.conf instead of synnefo.

Extend servers info API response with 'SNF:port_forwarding' attribute,
describing port fowarding rules (DNAT) that are applied to vms. The
description of such rules is done via the new CYCLADES_PORT_FORWARDING
setting. This setting can be either a dictionary mapping to ports to
tuples of (host, port), or a callable object that must return such a
tuple.   The caller will pass to the callable the following positional
arguments, in the following order:
* server_id: The ID of the VM in the DB
* ip_address: The IPv4 address of the public VM NIC
* fqdn: The FQDN of the VM
* user: The UUID of the owner of the VM

Extend the servers info API response with the 'SNF:fqdn' attribute,
containg the vm's domain name in a DNS. This attribue is configurable by
the 'CYCLADES_SERVERS_FQDN' setting. If this setting is set to None,
then then the first public IPv4 or IPv6 address is returned.

handle the case where available resource quota is less than the
corresponding active quota (for cpu, mem and disk resources).

Fix bugs in network-modify command, and specifically when modifying
a network to a floating IP pool:
* do not check availability of link in backends in which the network is
  already created.
* check about the group list was working only with ganeti>=2.7
* fix wrong string formatting

prevent user from allocating new ip addresses if no available pools exist

Check that IPv6 network netmask is /64, because this is imposed by the
'mac2eui64' utility that generates EUI-64 addresses from 48-bit MAC
addresses.

Refs #4201

Move code for network parameters validation from 'api' module to 'logic'.

Commit 7cfc0ce moved code from webproject to snf_django. This commit
fixes some stale imports that skipped renaming.

Remove some hard-coded IDs from tests.

snf-webproject contained the generic ListCommand, and because of this it
had a dependency from snf-django-lib. This commit moves this command from
snf-webproject to snf-django-lib and removes this dependency. Also,
updates all imports of ListCommand.

Refs #4041

Add option in snf-manage network-create command to create network in all
backends.

Make all quotaholder commissions to have a name. Since, Cyclades does
not store the association of a commission with a resource, we include
the resource in the commission name.

Make unicode method of VirtualMachine, Network and FloatingIP models more
verbose.

Update snf-manage network-create command to take a list of comma
seperated backend IDs to create the network to.

Extend reconciliation mechanism, to detect instances with stale pending
tasks, by looking if the corresponding job, 'vm.task_job_id', is still
running in the Ganeti backend.

Also refactor code that performed reconciliation for buildign vms, to
get the Ganeti job from the already retrieved job list.

Set firewall profile per NIC, because since Floating IPs an instance can
have more than one NICs in a public network. Extend the API call to take
the NIC index as argument, and modify the Ganeti instance tags to be
formated with the NIC index.

Do not include the floating IP pools, to the available public networks
when allocating an IPv4 address, when 'SNF:ANY_PUBLIC' option is used.

Merge code from logic/networks.py and network management commands.

Add a check when creating IP_LESS_ROUTED networks, that the connectivity
link is not already used by another network.

Add '--floating-ip-pool' option to network-modify management command, in
order to convert a network to a floating IP pool. Conversation of a
network to a floating IP pool requires the creation of the network to
all Ganeti backends. Also, a check is added to to ensure that the link
is available in the Ganeti backend.
Signed-off-by: Christos Stavrakakis <cstavr@grnet.gr>

Fix bug caused by wrong identation level. Modification of network in
Ganeti should be performed only if 'add_reserved_ips' or
'remove_reserved_ips' options are used.