Public bug reported:
Description =========== When resizing instances, eventhough a destination host is different with a source host and they don't have a shared storage, nova deal with it as a shared storage. The reason is that the source host and destination have the same host_ip i.e 127.0.0.1 So the source and dest IP are the same, nova think that they are on the same filesystem. (https://github.com/openstack/nova/blob/stable/ocata/nova/virt/libvirt/driver.py#L7250) shared_storage = (dest == self.get_host_ip_addr() However, in fact, the source host is different with destination host 127.0.0.1 is the default config of my_ip in nova.conf (https://github.com/openstack/nova/blob/stable/ocata/nova/conf/netconf.py#L26 and https://github.com/openstack/oslo.utils/blob/master/oslo_utils/netutils.py#L301) Steps to reproduce ================== Preconditions * Did NOT use shared storages. * checked there is no default gateway in 2 hypepvisor hosts. (If there is, remove it.) [root@compute2 ~]# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 128.80.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eno2 link-local 0.0.0.0 255.255.0.0 U 1003 0 0 eno2 [root@compute2 ~]# 1. I installed OpenStack with the 2 compute nodes 2. then I checked the hypervisor host_ip # nova hypervisor-show compute1 | grep host_ip | host_ip | 127.0.0.1 | # nova hypervisor-show compute2 | grep host_ip | host_ip | 127.0.0.1 | 3. create a vm 4. resize the vm Expected result =============== Resize should be failed. Actual result ============= Resize go with incorrect images Environment =========== 1. Exact version of OpenStack you are running. Ocata, (Pike and master may be same) 2. Which hypervisor did you use? Libvirt + KVM 2. Which storage type did you use? N/A (lvm) 3. Which networking type did you use? Neutron Logs & Configs ============== There is no my_ip value of nova.conf in all compute nodes # ssh compute1 grep ^my_ip /etc/nova/nova.conf # ssh compute2 grep ^my_ip /etc/nova/nova.conf # allow_resize_to_same_host should be false # ssh compute1 grep ^allow_resize_to_same_host /etc/nova/nova.conf allow_resize_to_same_host=False ** Affects: nova Importance: Undecided Assignee: Wonil Choi (wonil22) Status: New ** Changed in: nova Assignee: (unassigned) => Wonil Choi (wonil22) -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1722443 Title: Incorrect checking shared storages on resizing VM instances Status in OpenStack Compute (nova): New Bug description: Description =========== When resizing instances, eventhough a destination host is different with a source host and they don't have a shared storage, nova deal with it as a shared storage. The reason is that the source host and destination have the same host_ip i.e 127.0.0.1 So the source and dest IP are the same, nova think that they are on the same filesystem. (https://github.com/openstack/nova/blob/stable/ocata/nova/virt/libvirt/driver.py#L7250) shared_storage = (dest == self.get_host_ip_addr() However, in fact, the source host is different with destination host 127.0.0.1 is the default config of my_ip in nova.conf (https://github.com/openstack/nova/blob/stable/ocata/nova/conf/netconf.py#L26 and https://github.com/openstack/oslo.utils/blob/master/oslo_utils/netutils.py#L301) Steps to reproduce ================== Preconditions * Did NOT use shared storages. * checked there is no default gateway in 2 hypepvisor hosts. (If there is, remove it.) [root@compute2 ~]# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 128.80.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eno2 link-local 0.0.0.0 255.255.0.0 U 1003 0 0 eno2 [root@compute2 ~]# 1. I installed OpenStack with the 2 compute nodes 2. then I checked the hypervisor host_ip # nova hypervisor-show compute1 | grep host_ip | host_ip | 127.0.0.1 | # nova hypervisor-show compute2 | grep host_ip | host_ip | 127.0.0.1 | 3. create a vm 4. resize the vm Expected result =============== Resize should be failed. Actual result ============= Resize go with incorrect images Environment =========== 1. Exact version of OpenStack you are running. Ocata, (Pike and master may be same) 2. Which hypervisor did you use? Libvirt + KVM 2. Which storage type did you use? N/A (lvm) 3. Which networking type did you use? Neutron Logs & Configs ============== There is no my_ip value of nova.conf in all compute nodes # ssh compute1 grep ^my_ip /etc/nova/nova.conf # ssh compute2 grep ^my_ip /etc/nova/nova.conf # allow_resize_to_same_host should be false # ssh compute1 grep ^allow_resize_to_same_host /etc/nova/nova.conf allow_resize_to_same_host=False To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1722443/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
