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when helpdesk users search using ip address

In case creating a VM fails before the OP_INSTANCE_CREATE job is
enqueued in Ganeti, the VM and its NICs must be deleted, and the
resources must be released from Quotaholder, which is exactly what is
done when a VM is deleted from Ganeti. Instead of duplicating the code,
this commit uses the same function that is used by snf-dispatcher, by
mocking an successfully OP_INSTANCE_REMOVE.

Commit #32a0b85, modified server creation, by refetching the object from
DB after issuing commission to quotaholder. However, the new object is
not having the 'config_url' attributed, which is added to the vm object
by the 'vmapi'. This commit, fixes this by moving the signal dispatching
code after refetching the vm. Also, this commit makes more clear the
exception handling code, when the creation job can not be enqueued to
Ganeti.

Set backend to None if not specified.

FOOTER_EXTRA_MESSAGE setting appears above Copyright message at the
Compute templates and the Dashboard UI. Accepts html tags.

Simplify code by removing unnecessary temp variable.

Call to issue_and_accept_commission saves the resource object (eg a vm)
and commits the transaction. This has the side-effect that the resource
object becomes stale: its lock is released and another thread may acquire
it and update the db record. It is thus not safe to further update and then
save the stale object, since this would override others' changes. Instead,
lock and fetch the object again, where needed.

Ensure that a commission to release vm resources is issued only once.
If a vm is marked `deleted', then resources must have already been
released.

Remove trailing slash from the endpoints' publicURL field in service
definitions. These values end up in the response of POST /tokens, and,
according to the keystone API, should not end in slash. A trailing slash
breaks some clients, which do no proper checking before appending a
suffix.

Note that these URLs are not meant to act as a base path in the strict
semantics of http://tools.ietf.org/html/rfc3986#section-5.2.3 . Suffixes
should be merged into by a simple append (modulo catering for the joining
slash).

URLs are still configured as groups per prefix ending in a slash, eg:
'^account/' and '^ui/'. Permanent redirects are added for all non-API
endpoints (ui, helpdesk, admin, etc), so that `BASE_PATH/path' leads to
`BASE_PATH/path/'.

This commit reverts commits #07602322 and #30514662 which introduced a
bug in dispatcher's logic. These commit fixed the issue that, in a case
the Cyclades DB is unsynced with Ganeti, a resource that does not exist
in the Ganeti backend, it  will not be deleted from DB in case the
remove job fails.

This commits fixes this issue, by quering Ganeti each time a failed
OP_INSTANCE_REMOVE or OP_NETWORK_REMOVE is processed.

in default RDP connection profile served by synnefo

How vm connection user gets resolved:

- Use the last user in `users` vm metadata if exists
- Use the last user in `users` vm image metadata if exists
- Use root if vm's image osfamily metadata is Linux
- Use Administrator if vm's image osfamily metadata is windows

use libguestfs naming convention

redhat -> rhel
suse -> opensuse (also cloned as sles)

Make the pool size of the pithos backends a configurable setting,
namely PITHOS_BACKEND_POOL_SIZE.

Same as commit 0514662, but for servers.

Delete network from DB when job fails but the action of network is
DESTROY. This case appears when someone tries to remove a network that
has been deleted from Ganeti backend, but not yet from DB.

Change server reconciliation, to get the instances from DB after getting
instances from Ganeti, to decrease the possibility for races.

Fix bug in snf-dispatcher causing wrong updates of VMs from ganeti.
Creation if instance diagnostics must run inside a transaction, because
otherwise, the lock of the vm (select_for_update) is released too early.
Specifally, 'if_update_required' takes a lock on the VM and checks if
the timestamp of the message is newer than the one in the VM. If
diagnostic creation ('create_instance_diagnostic' function) does not run
inside a transaction, the lock is released when the diagnostic row is
inserted in the DB. However, after storing the diagnostic, the VM is
saved in order to update the 'updated' timestamp (otherwise,
MODIFIED_SINCE does not work correctly). In the meantime, another
message may update the VM, and this update will be lost. This commit
wrap 'create_instance_diagnostic' inside transaction to fix this issue.

This reverts commit cf2241c45a22dac71e31dbf32f4700c475804c12.

muliprocessing is included in python 2.6

Speed up reconciliation by using mulitprocessing to get in parallel
the instances from all Ganeti backends.

This commit fixes a bug that caused backend allocator to send
archipelago VMs backends to backends not in ARCHIPELAGO_BACKENDS
setting. The flavor disk template is parsed before the backend
allocation, so the disk_template at this point is ext and not ext_vlmc,
as it was expected.

vmapi skippede from commit 269ac8d.

Speed up reconciliation, by increasing the time interval to get Ganeti
job status for VMs in building state.

Fix deadlock between snf-dispatcher and backend allocator, by making
snf-dispatcher take an exclusive lock to the backend which hosts the vm,
before trying to get the exclusive locks to the IP pools in order to
reserve and release the instance IPs.

Dummy implementation of /extensions/<alias> endpoint that always returns
404.