OverHaul the Snapshot Workflow

Makes the Snapshot workflow much prettier and more functional.

Change-Id: Icdd66f64e6d336ad49ed3cf638a301d0ca92fda9
Signed-off-by: Parker Berberian <pberberian@iol.unh.edu>

3 files changed, 162 insertions, 1 deletions

diff --git a/src/api/migrations/0004_snapshotconfig_snapshotrelation.py b/src/api/migrations/0004_snapshotconfig_snapshotrelation.py
new file mode 100644
index 0000000..62bc7af
--- /dev/null
+++ b/src/api/migrations/0004_snapshotconfig_snapshotrelation.py
@@ -0,0 +1,42 @@
+# Generated by Django 2.1 on 2019-01-17 15:54
+
+import api.models
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('resource_inventory', '0004_auto_20181017_1532'),
+        ('api', '0003_auto_20190102_1956'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='SnapshotConfig',
+            fields=[
+                ('taskconfig_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='api.TaskConfig')),
+                ('image', models.IntegerField(null=True)),
+                ('dashboard_id', models.IntegerField()),
+                ('host', models.ForeignKey(null=True, on_delete=django.db.models.deletion.DO_NOTHING, to='resource_inventory.Host')),
+            ],
+            bases=('api.taskconfig',),
+        ),
+        migrations.CreateModel(
+            name='SnapshotRelation',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('status', models.IntegerField(default=0)),
+                ('task_id', models.CharField(default=api.models.get_task_uuid, max_length=37)),
+                ('lab_token', models.CharField(default='null', max_length=50)),
+                ('message', models.TextField(default='')),
+                ('config', models.OneToOneField(on_delete=django.db.models.deletion.CASCADE, to='api.SnapshotConfig')),
+                ('job', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='api.Job')),
+                ('snapshot', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='resource_inventory.Image')),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]
diff --git a/src/api/migrations/0005_snapshotconfig_delta.py b/src/api/migrations/0005_snapshotconfig_delta.py
new file mode 100644
index 0000000..559af90
--- /dev/null
+++ b/src/api/migrations/0005_snapshotconfig_delta.py
@@ -0,0 +1,18 @@
+# Generated by Django 2.1 on 2019-01-17 16:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0004_snapshotconfig_snapshotrelation'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='snapshotconfig',
+            name='delta',
+            field=models.TextField(default='{}'),
+        ),
+    ]
diff --git a/src/api/models.py b/src/api/models.py
index a1fedfe..e4016aa 100644
--- a/src/api/models.py
+++ b/src/api/models.py
@@ -214,6 +214,10 @@ class Job(models.Model):
             if 'network' not in d:
                 d['network'] = {}
             d['network'][relation.task_id] = relation.config.to_dict()
+        for relation in SnapshotRelation.objects.filter(job=self):
+            if 'snapshot' not in d:
+                d['snapshot'] = {}
+            d['snapshot'][relation.task_id] = relation.config.to_dict()
 
         j['payload'] = d
 
@@ -221,7 +225,13 @@ class Job(models.Model):
 
     def get_tasklist(self, status="all"):
         tasklist = []
-        clist = [HostHardwareRelation, AccessRelation, HostNetworkRelation, SoftwareRelation]
+        clist = [
+            HostHardwareRelation,
+            AccessRelation,
+            HostNetworkRelation,
+            SoftwareRelation,
+            SnapshotRelation
+        ]
         if status == "all":
             for cls in clist:
                 tasklist += list(cls.objects.filter(job=self))
@@ -261,6 +271,10 @@ class Job(models.Model):
             if 'network' not in d:
                 d['network'] = {}
             d['network'][relation.task_id] = relation.config.get_delta()
+        for relation in SnapshotRelation.objects.filter(job=self).filter(status=status):
+            if 'snapshot' not in d:
+                d['snapshot'] = {}
+            d['snapshot'][relation.task_id] = relation.config.get_delta()
 
         j['payload'] = d
         return j
@@ -534,6 +548,61 @@ class NetworkConfig(TaskConfig):
         self.delta = json.dumps(d)
 
 
+class SnapshotConfig(TaskConfig):
+
+    host = models.ForeignKey(Host, null=True, on_delete=models.DO_NOTHING)
+    image = models.IntegerField(null=True)
+    dashboard_id = models.IntegerField()
+    delta = models.TextField(default="{}")
+
+    def to_dict(self):
+        d = {}
+        if self.host:
+            d['host'] = self.host.labid
+        if self.image:
+            d['image'] = self.image
+        d['dashboard_id'] = self.dashboard_id
+        return d
+
+    def to_json(self):
+        return json.dumps(self.to_dict())
+
+    def get_delta(self):
+        if not self.delta:
+            self.delta = self.to_json()
+            self.save()
+        d = json.loads(self.delta)
+        return d
+
+    def clear_delta(self):
+        self.delta = json.dumps(self.to_dict())
+        self.save()
+
+    def set_host(self, host):
+        self.host = host
+        d = json.loads(self.delta)
+        d['host'] = host.labid
+        self.delta = json.dumps(d)
+
+    def set_image(self, image):
+        self.image = image
+        d = json.loads(self.delta)
+        d['image'] = self.image
+        self.delta = json.dumps(d)
+
+    def clear_image(self):
+        self.image = None
+        d = json.loads(self.delta)
+        d.pop("image", None)
+        self.delta = json.dumps(d)
+
+    def set_dashboard_id(self, dash):
+        self.dashboard_id = dash
+        d = json.loads(self.delta)
+        d['dashboard_id'] = self.dashboard_id
+        self.delta = json.dumps(d)
+
+
 def get_task(task_id):
     for taskclass in [AccessRelation, SoftwareRelation, HostHardwareRelation, HostNetworkRelation]:
         try:
@@ -617,9 +686,41 @@ class HostNetworkRelation(TaskRelation):
         return super(self.__class__, self).delete(*args, **kwargs)
 
 
+class SnapshotRelation(TaskRelation):
+    snapshot = models.ForeignKey(Image, on_delete=models.CASCADE)
+    config = models.OneToOneField(SnapshotConfig, on_delete=models.CASCADE)
+
+    def type_str(self):
+        return "Snapshot Task"
+
+    def get_delta(self):
+        return self.config.to_dict()
+
+    def delete(self, *args, **kwargs):
+        self.config.delete()
+        return super(self.__class__, self).delete(*args, **kwargs)
+
+
 class JobFactory(object):
 
     @classmethod
+    def makeSnapshotTask(cls, image, booking, host):
+        relation = SnapshotRelation()
+        job = Job.objects.get(booking=booking)
+        config = SnapshotConfig.objects.create(dashboard_id=image.id)
+
+        relation.job = job
+        relation.config = config
+        relation.config.save()
+        relation.config = relation.config
+        relation.snapshot = image
+        relation.save()
+
+        config.clear_delta()
+        config.set_host(host)
+        config.save()
+
+    @classmethod
     def makeCompleteJob(cls, booking):
         hosts = Host.objects.filter(bundle=booking.resource)
         job = None