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<h1 id="toc_0">Introduction Report</h1>
<h2 id="toc_1">Glance</h2>
<h3 id="toc_2">Code architecture</h3>
<p><img src="schema2.jpeg" alt="alt text"></p>
<p>(Glance registry is an optional layer organizing secure communication between the database abstraction layer and and the controller.)</p>
<h3 id="toc_3">References to <code>sqlalchemy</code></h3>
<p>The references to <code>sqlalchemy</code> can be found in <code>db.sqlalchemy.api</code>. As done in <code>Nova</code> project, we should copy/paste the code and edit it accordingly.</p>
<p>Here is the methodology used by Jonathan Pastor with Nova: </p>
<ul>
<li>Copy/paste the <code>db.api.py</code> file</li>
<li>Run the project</li>
<li>Modify the code depending upon the errors raised
<ul>
<li>CURL requests to Nova API endpoints</li>
<li>Until all endpoints work with <code>ROME</code></li>
</ul></li>
</ul>
<p>As suggested by Jonathan, we should use the same approach to update the references to <code>sqlalchemy</code> in Glance.</p>
<h3 id="toc_4">Update <code>ROME</code> to add new DB queries</h3>
<p>As <code>Nova</code> is bigger than <code>Glance</code>, it is possible that every DB queries needed by <code>Glance</code> are already implemented in <code>ROME</code>. However we will need to test every endpoint and add the missing queries if needed.</p>
<h2 id="toc_5">Test procedures</h2>
<p>As we edit the database API, we run all the tests available in <code>tests.unit.v2.test_registry_api.py</code>.<br>
All the tests in this file create fixtures and test all the features of the API by sending query using RPC protocol.</p>
<h2 id="toc_6">Gantt</h2>
<p><img src="Gantt.png" alt="Gantt"></p>
<h2 id="toc_7">Bilans périodiques</h2>
<h4 id="toc_8">Bilan du travail réalisé à la date du 17/11/2015</h4>
<ul>
<li>Ce qu'on voulait faire
<ul>
<li>virer les références à db.sqlalchemy dans les test unitaires</li>
<li>créer une couche d'abstraction db.api implémentée soit pas sqlalchemy soit discovery</li>
<li>dupliquer discovery et modifier les sessions</li>
</ul></li>
<li>Les problèmes/découvertes
<ul>
<li>Jonathan a découvert qu'un fichier de configuration existe pour définir le back-end employé (dans <code>glance-api.conf</code>)</li>
<li>erreurs de configuration dues à des packages ou fichiers de configurations manquants</li>
<li>vraisemblable problème d'import dans ROME (oslo.db semble ne pas exister, ce serait plutot oslo_db) -> A faire remonter à Jonathan</li>
</ul></li>
<li>Ce qu'on a/va réalisé
<ul>
<li>fait : dupliquer discovery et modifier les sessions (utilisation des sessions de ROME)</li>
<li>fork ROME et tester des modifications d'import</li>
<li>réaliser notre propre classe de test unitaire</li>
</ul></li>
</ul>
<h4 id="toc_9">Bilan du travail réalisé au 22/11/2015</h4>
<ul>
<li><p>Les problèmes/découvertes </p>
<ul>
<li>modifié le back-end dans glance-api.conf lorsque devstack était installé, ça a fonctionné. Avec glance installé seul, ça ne marche pas… pour les expériences, back-end changé en dur dans le code.</li>
<li>problèmes de configuration</li>
<li>nous arrivons à exécuter enfin les tests de la nouvelle implémentation. En revanche les tests échouent du à beaucoup d'erreurs que nous travaillons à débugger</li>
</ul></li>
<li><p>Ce qu'on a/va réalisé </p>
<ul>
<li> modifié le back-end dans glance-api.conf lorsque devstack était installé, ça a fonctionné. Avec glance installé seul, ça ne marche pas… pour les expériences, back-end changé en dur dans le code.</li>
<li> abandon de l'implementation d'une interface au profit de la solution ci-dessus.</li>
<li> besoin d'un composant pour les communications RPC ? après réinstallation au propre de glance, problème a disparu : on conserve les tests unitaires pour tester et on abandonne l'idée de créér nos propres tests unitaires</li>
</ul></li>
</ul>
<h4 id="toc_10">Bilan du travail réalisé au 28/11/2015</h4>
<ul>
<li><p>Les problèmes/découvertes </p>
<ul>
<li>La base de donnée Redis semble vide ce qui nous génère une erreur sur laquelle nous travaillons actuellement.</li>
</ul></li>
<li><p>Ce qu'on a/va réalisé </p>
<ul>
<li>modifications dans Glance pour utiliser les modèles de Rome ou appeler des méthodes de Rome qui n'ont pas le même nom dans SQLAlchemy.</li>
<li>Ajout des méthodes présentes dans GlanceBase de SQLAlchemy dans les modèles de ROME.</li>
</ul></li>
</ul>
<h4 id="toc_11">Bilan du travail réalisé au 7/12/2015</h4>
<ul>
<li><p>Les problèmes/découvertes </p>
<ul>
<li>D'autres tests (suppression d'images etc.) ne passent pas</li>
</ul></li>
<li><p>Ce qu'on a/va réalisé </p>
<ul>
<li>Tous les tests de création d'images fonctionnent</li>
</ul></li>
</ul>
<h4 id="toc_12">Bilan du travail réalisé au 16/12/2015</h4>
<ul>
<li><p>Les problèmes/découvertes </p>
<ul>
<li>Certains tests de récupération d'image <code>image_get_all</code> avec différents filtres en paramètres, ne fonctionnent pas.</li>
<li>Le test <code>image_update</code> ne fonctionne pas.</li>
</ul></li>
<li><p>Ce qu'on a/va réalisé </p>
<ul>
<li>21 tests sur 41 passent.</li>
<li>Nous allons tester ce Glance modifié avec Devstack en gardant ces 21/41 tests verts pour voir si c'est suffisant pour que les fonctionnalités principales de Devstack marchent.</li>
</ul></li>
</ul>
<h2 id="toc_13">Nova</h2>
<h3 id="toc_14">Changes made in <code>db.discovery.api</code> to use <code>ROME</code></h3>
<ul>
<li><p>get_session</p>
<ul>
<li>returns a <code>RomeSession</code> instead of a standard <code>SQLAlchemy</code> session.</li>
</ul></li>
<li><p>model_query</p>
<ul>
<li>returns <code>RomeQuery</code> instead of standard query.</li>
</ul></li>
<li><p>service_create</p>
<ul>
<li><p>Uses a lock (DLM) to create the service in a distributed context. Releases the lock after creation.</p></li>
<li><p>Call <code>service_create_</code> to create the service.</p></li>
</ul></li>
<li><p>service_create_</p>
<ul>
<li>Replaces <code>nova.db.sqlalchemy.models.Service().update(values)</code> and uses instead <code>model_query</code> and key/value system.</li>
</ul></li>
<li><p>service_update</p>
<ul>
<li>Checks that new values has key <code>report_count</code> and that <code>values.report_count == service_ref.report_count</code>, ???? otherwise doesn't update the service.</li>
<li>Adds <code>session.add(service_ref)</code>. ???</li>
</ul></li>
<li><p>compute_node_get_all</p>
<ul>
<li>Uses <code>RomeQuery</code> to return all compute nodes in a key/value way.</li>
</ul></li>
<li><p>compute_node_update</p>
<ul>
<li>Adds <code>session.add(compute_ref)</code> "to ease the session management" ????</li>
</ul></li>
<li><p>floating_ip_deallocate</p>
<ul>
<li>Adds <code>session.add(result)</code> "to ease the session management" ????</li>
</ul></li>
<li><p>fixed_ip_associate, fixed_ip_associate_pool</p>
<ul>
<li>Logs the info in the log file.<br>
Add a lock before the action and additionals checkings regarding generated <code>fixed_ip</code>.</li>
</ul></li>
<li><p>fixed_ip_disassociate_all_by_timeout, fixed_ip_get_by_instance, fixed_ip_update, instance_get_all, instance_get_all_by_filters, network_get_associated_fixed_ips, block_device_mapping_update_or_create, _security_group_create, flavor_get_all, aggregate_get_by_metadata_key, aggregate_update, aggregate_metadata_add, action_event_finish, instance_group_update, instance_group_update</p>
<ul>
<li>Implements methods that used to be in <code>IMPL</code> class with a hard coded implementation.</li>
</ul></li>
</ul>
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