Merge branch 'feature-virtio' into 'master'

Feature Virtio

Enhance CIRCLE to use virtio-serial ports to communicate with the agent.

⚠ WARNING ⚠

Requires (virtio branch):
🆕 agentdriver
🆕 vmdriver

Tests:
* new-windows agent ✅   (Working virtio with update watchdog for service restart)
* new-linux agent ✅
* legacy-windows agent ⚠ (Old windows agent can't update)
* legacy-linux: ✅  Working update with less than 16k tar

See merge request !205

circle/circle/settings/base.py

@@ -431,9 +431,18 @@ LOGIN_REDIRECT_URL = "/"
 
 AGENT_DIR = get_env_variable(
     'DJANGO_AGENT_DIR', join(unicode(expanduser("~")), 'agent'))
+    # AGENT_DIR is the root directory for the agent.
+    # The directory structure SHOULD be:
+    # /home/username/agent
+    # |-- agent-linux
+    # |    |-- .git
+    # |    +-- ...
+    # |-- agent-win
+    # |    +-- agent-win-%(version).exe
+    #
 
 try:
-    git_env = {'GIT_DIR': join(AGENT_DIR, '.git')}
+    git_env = {'GIT_DIR': join(join(AGENT_DIR, "agent-linux"), '.git')}
     AGENT_VERSION = check_output(
         ('git', 'log', '-1', r'--pretty=format:%h', 'HEAD'), env=git_env)
 except:

circle/vm/tasks/agent_tasks.py

@@ -53,8 +53,18 @@ def start_access_server(vm):
     pass
 
 
+@celery.task(name='agent.update_legacy')
+def update_legacy(vm, data, executable=None):
+    pass
+
+
+@celery.task(name='agent.append')
+def append(vm, data, filename, chunk_number):
+    pass
+
+
 @celery.task(name='agent.update')
-def update(vm, data):
+def update(vm, filename, executable, checksum):
     pass
 
 

circle/vm/tasks/local_agent_tasks.py

@@ -19,11 +19,14 @@ from common.models import create_readable
 from manager.mancelery import celery
 from vm.tasks.agent_tasks import (restart_networking, change_password,
                                   set_time, set_hostname, start_access_server,
-                                  cleanup, update, change_ip)
+                                  cleanup, update, append,
+                                  change_ip, update_legacy)
 from firewall.models import Host
 
 import time
+import os
 from base64 import encodestring
+from hashlib import md5
 from StringIO import StringIO
 from tarfile import TarFile, TarInfo
 from django.conf import settings
@@ -61,17 +64,34 @@ def send_networking_commands(instance, act):
         restart_networking.apply_async(queue=queue, args=(instance.vm_name, ))
 
 
-def create_agent_tar():
+def create_linux_tar():
     def exclude(tarinfo):
-        if tarinfo.name.startswith('./.git'):
+        ignored = ('./.', './misc', './windows')
+        if any(tarinfo.name.startswith(x) for x in ignored):
             return None
         else:
             return tarinfo
 
     f = StringIO()
 
+    with TarFile.open(fileobj=f, mode='w:gz') as tar:
+        agent_path = os.path.join(settings.AGENT_DIR, "agent-linux")
+        tar.add(agent_path, arcname='.', filter=exclude)
+
+        version_fileobj = StringIO(settings.AGENT_VERSION)
+        version_info = TarInfo(name='version.txt')
+        version_info.size = len(version_fileobj.buf)
+        tar.addfile(version_info, version_fileobj)
+
+    return encodestring(f.getvalue()).replace('\n', '')
+
+
+def create_windows_tar():
+    f = StringIO()
+
+    agent_path = os.path.join(settings.AGENT_DIR, "agent-win")
     with TarFile.open(fileobj=f, mode='w|gz') as tar:
-        tar.add(settings.AGENT_DIR, arcname='.', filter=exclude)
+        tar.add(agent_path, arcname='.')
 
         version_fileobj = StringIO(settings.AGENT_VERSION)
         version_info = TarInfo(name='version.txt')
@@ -82,7 +102,7 @@ def create_agent_tar():
 
 
 @celery.task
-def agent_started(vm, version=None):
+def agent_started(vm, version=None, system=None):
     from vm.models import Instance, instance_activity, InstanceActivity
     instance = Instance.objects.get(id=int(vm.split('-')[-1]))
     queue = instance.get_remote_queue_name("agent")
@@ -105,7 +125,7 @@ def agent_started(vm, version=None):
 
         if version and version != settings.AGENT_VERSION:
             try:
-                update_agent(instance, act)
+                update_agent(instance, act, system, settings.AGENT_VERSION)
             except TimeoutError:
                 pass
             else:
@@ -147,11 +167,16 @@ def measure_boot_time(instance):
 @celery.task
 def agent_stopped(vm):
     from vm.models import Instance, InstanceActivity
+    from vm.models.activity import ActivityInProgressError
     instance = Instance.objects.get(id=int(vm.split('-')[-1]))
     qs = InstanceActivity.objects.filter(instance=instance,
                                          activity_code='vm.Instance.agent')
     act = qs.latest('id')
-    with act.sub_activity('stopping', readable_name=ugettext_noop('stopping')):
+    try:
+        with act.sub_activity('stopping',
+                              readable_name=ugettext_noop('stopping')):
+            pass
+    except ActivityInProgressError:
         pass
 
 
@@ -162,7 +187,7 @@ def get_network_configs(instance):
     return (interfaces, settings.FIREWALL_SETTINGS['rdns_ip'])
 
 
-def update_agent(instance, act=None):
+def update_agent(instance, act=None, system=None, version=None):
     if act:
         act = act.sub_activity(
             'update',
@@ -178,6 +203,40 @@ def update_agent(instance, act=None):
                 version=settings.AGENT_VERSION))
     with act:
         queue = instance.get_remote_queue_name("agent")
-        update.apply_async(
-            queue=queue,
-            args=(instance.vm_name, create_agent_tar())).get(timeout=10)
+        if system == "Windows":
+            executable = os.listdir(os.path.join(settings.AGENT_DIR,
+                                                 "agent-win"))[0]
+            # executable = "agent-winservice-%(version)s.exe" % {
+            #   'version': version}
+            data = create_windows_tar()
+        elif system == "Linux":
+            executable = ""
+            data = create_linux_tar()
+        else:
+            executable = ""
+            # Legacy update method
+            return update_legacy.apply_async(
+                queue=queue,
+                args=(instance.vm_name, create_linux_tar())
+            ).get(timeout=60)
+
+        checksum = md5(data).hexdigest()
+        chunk_size = 1024 * 1024
+        chunk_number = 0
+        index = 0
+        filename = version + ".tar"
+        while True:
+            chunk = data[index:index+chunk_size]
+            if chunk:
+                append.apply_async(
+                    queue=queue,
+                    args=(instance.vm_name, chunk,
+                          filename, chunk_number)).get(timeout=60)
+                index = index + chunk_size
+                chunk_number = chunk_number + 1
+            else:
+                update.apply_async(
+                    queue=queue,
+                    args=(instance.vm_name, filename, executable, checksum)
+                ).get(timeout=60)
+                break