Barebones LXC hypervisor

This needs lots of work, but it can successfully launch an LXC-based
instance.  See the docstring for the limitations/work to be done.
Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Balazs Lecz <leczb@google.com>

Makefile.am

@@ -136,6 +136,7 @@ hypervisor_PYTHON = \
 	lib/hypervisor/hv_chroot.py \
 	lib/hypervisor/hv_fake.py \
 	lib/hypervisor/hv_kvm.py \
+	lib/hypervisor/hv_lxc.py \
 	lib/hypervisor/hv_xen.py
 
 rapi_PYTHON = \

lib/constants.py

@@ -632,7 +632,15 @@ HT_FAKE = "fake"
 HT_XEN_HVM = "xen-hvm"
 HT_KVM = "kvm"
 HT_CHROOT = "chroot"
-HYPER_TYPES = frozenset([HT_XEN_PVM, HT_FAKE, HT_XEN_HVM, HT_KVM, HT_CHROOT])
+HT_LXC = "lxc"
+HYPER_TYPES = frozenset([
+  HT_XEN_PVM,
+  HT_FAKE,
+  HT_XEN_HVM,
+  HT_KVM,
+  HT_CHROOT,
+  HT_LXC,
+  ])
 HTS_REQ_PORT = frozenset([HT_XEN_HVM, HT_KVM])
 
 VNC_BASE_PORT = 5900
@@ -877,6 +885,8 @@ HVC_DEFAULTS = {
   HT_CHROOT: {
     HV_INIT_SCRIPT: "/ganeti-chroot",
     },
+  HT_LXC: {
+    },
   }
 
 HVC_GLOBALS = frozenset([

lib/hypervisor/__init__.py

@@ -30,6 +30,7 @@ from ganeti.hypervisor import hv_fake
 from ganeti.hypervisor import hv_xen
 from ganeti.hypervisor import hv_kvm
 from ganeti.hypervisor import hv_chroot
+from ganeti.hypervisor import hv_lxc
 
 
 _HYPERVISOR_MAP = {
@@ -38,6 +39,7 @@ _HYPERVISOR_MAP = {
   constants.HT_FAKE: hv_fake.FakeHypervisor,
   constants.HT_KVM: hv_kvm.KVMHypervisor,
   constants.HT_CHROOT: hv_chroot.ChrootManager,
+  constants.HT_LXC: hv_lxc.LXCHypervisor,
   }