Partial fixes for issues pointed by @rscnt
- Moved opennebula constants to base.py - Refactored all opennebula functions from admin.py to opennebula_functions.py - string#format for some strings - Renamed my_view function to show_vms - Added logger to show logs of exceptions generated
This commit is contained in:
M.Ravi
parent
af3818d64a
commit
a8952700d6
4 changed files with 261 additions and 203 deletions
178
hosting/admin.py
178
hosting/admin.py
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@ -1,23 +1,13 @@
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from django.contrib import admin
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from django.utils.html import format_html
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from django.core.urlresolvers import reverse
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from django.conf.urls import url
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from django.template.response import TemplateResponse
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from django.conf import settings
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from utils.mailer import BaseEmail
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from django import template
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from django.shortcuts import redirect
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from django.contrib import messages
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from django.contrib.auth.signals import user_logged_in
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import random
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import string
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import oca
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import socket
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from oca.exceptions import OpenNebulaException
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from utils.mailer import BaseEmail
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from django.contrib.auth.signals import user_logged_in
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from .forms import HostingOrderAdminForm
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from .models import VirtualMachineType, VirtualMachinePlan, HostingOrder, ManageVM
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from .opennebula_functions import HostingManageVMAdmin, user_logged_in_callback
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class HostingOrderAdmin(admin.ModelAdmin):
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# fields = ('slug', 'imdb_link', 'start', 'finish', 'added_by')
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@ -103,166 +93,10 @@ class VirtualMachinePlanAdmin(admin.ModelAdmin):
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email.send()
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obj.save()
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class HostingManageVMAdmin(admin.ModelAdmin):
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client = None
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def get_urls(self):
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urls = super().get_urls()
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my_urls = [
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url(r'^$', self.admin_site.admin_view(self.my_view, cacheable=True), name='showvms'),
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url(r'^create_vm/$', self.admin_site.admin_view(self.create_vm, cacheable=True), name='createvm'),
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url(r'^delete_vm/(?P<vmid>\d+)/$', self.admin_site.admin_view(self.delete_vm, cacheable=True), name='deletevm'),
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url(r'^stop_vm/(?P<vmid>\d+)/$', self.admin_site.admin_view(self.stop_vm, cacheable=True), name='stopvm'),
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url(r'^start_vm/(?P<vmid>\d+)/$', self.admin_site.admin_view(self.start_vm, cacheable=True), name='startvm'),
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]
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return my_urls + urls
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# Function to initialize opennebula client based on the logged in
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# user
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def init_opennebula_client(self, opennebula_user):
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opennebula_user_password = get_random_password()
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self.client = oca.Client(opennebula_user + ':' + opennebula_user_password, settings.OPENNEBULA_PROTOCOL + '://' + settings.OPENNEBULA_DOMAIN + ':' + settings.OPENNEBULA_PORT + settings.OPENNEBULA_ENDPOINT)
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# Function that lists the VMs of the current user
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def my_view(self, request):
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try :
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self.init_opennebula_client(str(request.user))
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vm_pool = oca.VirtualMachinePool(self.client)
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vm_pool.info()
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except socket.timeout:
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messages.add_message(request, messages.ERROR, "Socket timeout error.")
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except OpenNebulaException:
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messages.add_message(request, messages.ERROR, "OpenNebulaException occurred.")
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except OSError as err:
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messages.add_message(request, messages.ERROR, str("OS error: {0}".format(err)))
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context = dict(
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# Include common variables for rendering the admin template.
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self.admin_site.each_context(request),
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vms = vm_pool,
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)
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return TemplateResponse(request, "hosting/managevms.html", context)
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# Creating VM by using method allocate(client, template)
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def create_vm(self, request):
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message = ''
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# check if the request contains the template parameter, if it is
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# not set warn the user of setting this.
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vm_template = request.POST.get('vm_template')
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if vm_template == 'select' :
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messages.add_message(request, messages.ERROR, "Please select a vm template")
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else :
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try :
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# We do have the vm_template param set. Get and parse it
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# and check it to be in the desired range.
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vm_template_int = int(vm_template)
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if vm_template_int >=1 and vm_template_int <= 8:
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# Lets create a test VM with 128MB of ram and 1 CPU
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vm_id = oca.VirtualMachine.allocate(self.client, '<VM><MEMORY>' + str(1024 * vm_template_int) + '</MEMORY><VCPU>' + str(vm_template_int)+ '</VCPU><CPU>' + str(0.1 * vm_template_int) + '</CPU><DISK><TYPE>fs</TYPE><SIZE>' + str(10000 * vm_template_int) + '</SIZE></DISK></VM>')
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message = "Created with id = " + str(vm_id)
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vm_pool = self.get_vms()
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messages.add_message(request, messages.SUCCESS, message)
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else:
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messages.add_message(request, messages.ERROR, "Please select an appropriate value for vm template.")
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except socket.timeout:
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messages.add_message(request, messages.ERROR, "Socket timeout error.")
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except OpenNebulaException:
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messages.add_message(request, messages.ERROR, "OpenNebulaException occurred.")
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except OSError as err:
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messages.add_message(request, messages.ERROR, str("OS error: {0}".format(err)))
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except ValueError:
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messages.add_message(request, messages.ERROR, "Please select an appropriate value for vm template.")
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return redirect('admin:showvms')
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# Retrives virtual machine pool information
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def get_vms(self):
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vm_pool = oca.VirtualMachinePool(self.client)
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vm_pool.info()
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return vm_pool
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# Delete VM from the pool and DB by using method finalize()
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def delete_vm(self, request, vmid):
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# get the desired vm from the pool
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vm_id = int(vmid)
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vm = self.get_vm_by_id(vm_id)
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if vm == -1:
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messages.add_message(request, messages.ERROR, "Did not find a vm with id = " + str(vm_id))
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else :
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print("Deleting vm_id = " + str(vm_id) + " state = " + vm.str_state)
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if vm.str_state == 'PENDING' or vm.str_state =='POWEROFF' or vm.str_state =='ACTIVE':
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vm.delete()
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messages.add_message(request, messages.SUCCESS, "Deleted from " + vm.str_state + " state vm with id = " + str(vm_id))
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else:
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vm.finalize()
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messages.add_message(request, messages.SUCCESS, "Deleted (using finalize()) from " + vm.str_state + " state vm with id = " + str(vm_id))
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return redirect('admin:showvms')
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def stop_vm(self, request, vmid):
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vm_id = int(vmid)
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vm = self.get_vm_by_id(vm_id)
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if vm == -1:
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messages.add_message(request, messages.ERROR, "Did not find a vm with id = " + str(vm_id))
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else :
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vm.stop()
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messages.add_message(request, messages.SUCCESS, "Stopped the vm with id = " + str(vm_id))
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return redirect('admin:showvms')
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def start_vm(self, request, vmid):
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vm_id = int(vmid)
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vm = self.get_vm_by_id(vm_id)
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if vm == -1:
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messages.add_message(request, messages.ERROR, "Did not find a vm with id = " + str(vm_id))
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else :
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vm.resume()
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messages.add_message(request, messages.SUCCESS, "Started the vm with id = " + str(vm_id))
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return redirect('admin:showvms')
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def get_vm_by_id(self, vmid):
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vms = self.get_vms()
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vms
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for vm in vms:
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if vm.id == vmid :
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return vm
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return -1
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# callback for creating opennebula users on user login
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def user_logged_in_callback(sender, request, user, **kwargs):
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client = oca.Client(settings.OPENNEBULA_USERNAME + ':' + settings.OPENNEBULA_PASSWORD, settings.OPENNEBULA_PROTOCOL + '://' + settings.OPENNEBULA_DOMAIN + ':' + settings.OPENNEBULA_PORT + settings.OPENNEBULA_ENDPOINT)
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# Notes:
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# 1. python-oca library's oca.User.allocate(client, user, pass)
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# method does not work with python-oca version oca-4.15.0a1-py3.5
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# This is because the call is missing a fourth parameter
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# auth_driver.
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# To overcome this issue, we make a direct call to xml-rpc method
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# 'user.allocate' passing this fourth parameter.
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#
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# 2. We have a dummy authentication driver in opennebula and we
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# use this so as to avoid opennebula authentication. However, we
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# need to supply a dummy password. Without this, we can not
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# create an OpenNebula user. We use dummy string 'a' as password
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# for all users.
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#
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# 3. We user the user's email as the user name.
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if find_opennebula_user_by_name(str(user.email), client) == -1 :
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user_id = client.call('user.allocate', str(user.email), get_random_password(), 'dummy')
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print("User " + str(user.email) + " does not exist. Created the user. User id = " + str(user_id))
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# Finds if an OpenNebula user with user_name exists. Returns the
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# OpenNebula user if it exists, -1 otherwise.
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def find_opennebula_user_by_name(user_name, client):
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pool = oca.UserPool(client)
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pool.info()
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for user in pool:
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if user.name == user_name :
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return user
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return -1
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# Returns random password that is needed by OpenNebula
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def get_random_password():
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return ''.join(random.SystemRandom().choice(string.ascii_uppercase + string.digits) for _ in range(20))
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user_logged_in.connect(user_logged_in_callback)
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admin.site.register(HostingOrder, HostingOrderAdmin)
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admin.site.register(VirtualMachineType)
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admin.site.register(VirtualMachinePlan, VirtualMachinePlanAdmin)
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admin.site.register(ManageVM, HostingManageVMAdmin)
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user_logged_in.connect(user_logged_in_callback)
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admin.site.register(ManageVM, HostingManageVMAdmin)
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