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>

storages/models.py

@@ -1,3 +1,47 @@
 from django.db import models
+from django.utils.translation import gettext_lazy as _
 
 # Create your models here.
+class Storages(models.Model):
+    name = models.CharField(_('name'), max_length=20, error_messages={'required': _('No pool name has been entered')})
+    status = models.IntegerField(_('status'))
+    type = models.CharField(_('type'), max_length=100)
+    size = models.IntegerField(_('size'))
+    volumes = models.IntegerField(_('volumes'))
+
+    def __str__(self):
+        return f'{self.name}'
+    
+    class Meta:
+        managed = False
+
+
+class Volume(models.Model):
+    name = models.CharField(_('name'), max_length=128)
+    type = models.CharField(_('format'), max_length=12, choices=(('qcow2', 'qcow2 (recommended)'), ('qcow', 'qcow'), ('raw', 'raw')))
+    allocation = models.IntegerField(_('allocation'))
+    size = models.IntegerField(_('size'))
+
+    def __str__(self):
+        return f'{self.name}'
+
+    class Meta:
+        managed = False
+        verbose_name_plural = "Volumes"
+
+
+class Storage(models.Model):
+    state = models.IntegerField(_('state'))
+    size = models.IntegerField(_('size'))
+    free = models.IntegerField(_('free'))
+    status = models.CharField(_('status'), max_length=128)
+    path = models.CharField(_('path'), max_length=128)
+    type = models.CharField(_('type'), max_length=128)
+    autostart = models.BooleanField(_('autostart'))
+    volumes = models.ForeignKey(Volume, on_delete=models.DO_NOTHING)
+
+    def __str__(self):
+        return f'{self.path}'
+
+    class Meta:
+        managed = False