Rest framework (#24)

* Add rest framework for API: First Commit

* modify some shell scripts to make variable references safer; modify some python scripts to reduce the code complexity and cyclomatic complexity of functions.

* Add REST API for some webvirtcloud functions. Instance list/delete/create, compute list/delete/create, storages-network list/retrieve. Add swagger and redoc for API interface

* update requirements

Co-authored-by: herengui <herengui@uniontech.com>

instances/api/serializers.py

@@ -0,0 +1,100 @@
+from rest_framework import serializers
+
+from instances.models import Flavor, Instance, MigrateInstance, CreateInstance
+
+
+class InstanceSerializer(serializers.ModelSerializer):
+    
+    class Meta:
+        model = Instance
+        fields = ['id', 'compute', 'name', 'uuid', 'is_template', 'created', 'drbd']
+
+
+class InstanceDetailsSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = Instance
+        fields = [
+            'id',
+            'compute',
+            'status',
+            'uuid',
+            'name',
+            'title',
+            'description',
+            'is_template',
+            'created',
+            'drbd',
+            'arch',
+            'machine',
+            'vcpu',
+            'memory',
+            'firmware',
+            'nvram',
+            'bootmenu',
+            'boot_order',
+            'disks',
+            'media',
+            'media_iso',
+            'snapshots',
+            'networks',
+            'console_type',
+            'console_port',
+            'console_keymap',
+            'console_listener_address',
+            'video_model',
+            'guest_agent_ready',
+            'autostart']
+
+
+class FlavorSerializer(serializers.ModelSerializer):
+
+    class Meta:
+        model = Flavor
+        fields = ['label', 'memory', 'vcpu', 'disk']
+
+
+class CreateInstanceSerializer(serializers.ModelSerializer):
+    firmware_choices = (
+        ('', 'BIOS'),
+        #('UEFI', 'UEFI'),
+    )
+    firmware = serializers.ChoiceField(choices = firmware_choices)
+    graphics = serializers.CharField(initial='vnc')
+    video = serializers.CharField(initial='vga')
+    storage = serializers.CharField(initial='default')
+    cache_mode = serializers.CharField(initial='none')
+    virtio = serializers.BooleanField(initial=True)
+    qemu_ga = serializers.BooleanField(initial=True)
+
+    class Meta:
+        model = CreateInstance
+        fields = [
+            'name',
+            'firmware',
+            'vcpu',
+            'vcpu_mode',
+            'memory',
+            'networks',
+            'mac',
+            'nwfilter',
+            'storage',
+            'hdd_size',
+            'cache_mode',
+            'meta_prealloc',
+            'virtio',
+            'qemu_ga',
+            'console_pass',
+            'graphics',
+            'video',
+            'listener_addr'
+        ]
+
+
+class MigrateSerializer(serializers.ModelSerializer):
+    instance = Instance.objects.all().prefetch_related("userinstance_set")
+    live = serializers.BooleanField(initial=True)
+    xml_del = serializers.BooleanField(initial=True)
+    class Meta:
+        model = MigrateInstance
+        fields = ['instance', 'target_compute', 'live', 'xml_del', 'offline', 'autoconverge', 'compress', 'postcopy', 'unsafe']