kvm + Vnc + Mouse pointer sync issue

While we use the Vnc we could see that the mouse pointer in the Vnc Viewer is not sync with  the system Vnc.

This can be solved by adding the option -usbdevice tablet  along the kvm command

Example

$KVM -m 2048 -smp 2 -cdrom $ISO -drive file=$VIRTIO_ISO,index=3,media=cdrom  -drive file=$IMAGE,if=virtio,boot=off -boot d -vga std -k en-us -vnc 10.1.17.42:1 -usbdevice tablet

"Host key verification failed" error while resizing instance Openstack

Setting allow_resize_to_same_host=true will enable the resizing in All in one model of installation . but if we have mutiple controller and compute node's we will be getting an authentication error as following

"/usr/lib/python2.6/site-packages/nova/virt/libvirt/driver.py", line 4907,
in migrate_disk_and_power_off\n utils.execute(\'ssh\', dest, \'mkdir\', \'-p\', inst_base)\n', '
File "/usr/lib/python2.6/site-packages/nova/utils.py", line 165, in execute\n return processutils.execute(*cmd, **kwargs)\n', '
File "/usr/lib/python2.6/site-packages/nova/openstack/common/processutils.py", line 193, in execute\n cmd=\' \'.join(cmd))\n',
"ProcessExecutionError: Unexpected error while running command.\nCommand: ssh 10.1.15.44
mkdir -p /var/lib/nova/instances/5d5ced81-6fb1-4028-97cd-686e450d1bab\nExit code: 255\nStdout: ''\nStderr:
'Host key verification failed.\\r\\n'\n"]

This is due to a bug in nova as told in below bug report which can be solved by enabling password less authentication between the compute and controller node's nova user .

https://bugzilla.redhat.com/show_bug.cgi?id=975014#c3

By default the nova user does not have a shell so we need to enable the shell and do steps to enable password less authentication between all the server .

Enable shell for nova user

In all the controller and compute server’s enable nova user.

sed -i "s/\/var\/lib\/nova:\/sbin\/nologin/\/var\/lib\/nova:\/bin\/bash/g" /etc/passwd

cat /etc/passwd |grep nova

nova:x:162:162:OpenStack Nova Daemons:/var/lib/nova:/bin/bash

Enable password less authentication

Between all the compute and controller nodes create password less authenticatioin for user nova.

 

su - nova

ssh-keygen

ssh-copy-id

Creating Multiple Network in Openstack – Icehouse

Adding first network

On Network Node

#Add the integration bridge:
ovs-vsctl add-br br-int
#Add the external bridge:
ovs-vsctl add-br br-ex
#Add a port to the external bridge that connects to the physical external network interface:
#Replace INTERFACE_NAME with the actual interface name. For example, eth2 or ens256.
ovs-vsctl add-port br-ex eth2

On Controller Node

[root@controller1 ~]# source /root/admin-openrc.sh
[root@controller1 ~]# neutron net-create ext-net --shared --router:external=True
Created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | 2fdfff06-5837-4ab8-b971-c08696165e9d |
| name | ext-net |
| provider:network_type | gre |
| provider:physical_network | |
| provider:segmentation_id | 1 |
| router:external | True |
| shared | True |
| status | ACTIVE |
| subnets | |
| tenant_id | 8c9fb6577a1e45879f35e3e43b34de58 |
+---------------------------+--------------------------------------+
[root@controller1 ~]#
[root@controller1 ~]# neutron subnet-create ext-net --name ext-subnet --allocation-pool start=192.168.10.129,end=192.168.10.254 --disable-dhcp --gateway 192.168.10.1 192.168.10.128/24
Created a new subnet:
+------------------+------------------------------------------------+
| Field | Value |
+------------------+------------------------------------------------+
| allocation_pools | {"start": "192.168.10.129", "end": "192.168.10.254"} |
| cidr | 192.168.10.0/24 |
| dns_nameservers | |
| enable_dhcp | False |
| gateway_ip | 192.168.10.1 |
| host_routes | |
| id | 09ec246e-4b1d-4fcb-babc-fdfd73ad13d0 |
| ip_version | 4 |
| name | ext-subnet |
| network_id | 2fdfff06-5837-4ab8-b971-c08696165e9d |
| tenant_id | 8c9fb6577a1e45879f35e3e43b34de58 |
+------------------+------------------------------------------------+
[root@controller1 ~]# neutron net-create demo-net
Created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | df86ab38-57f2-432b-8ea8-ef30ceb72607 |
| name | demo-net |
| provider:network_type | gre |
| provider:physical_network | |
| provider:segmentation_id | 2 |
| shared | False |
| status | ACTIVE |
| subnets | |
| tenant_id | 8c9fb6577a1e45879f35e3e43b34de58 |
+---------------------------+--------------------------------------+
[root@controller1 ~]# neutron subnet-create demo-net --name demo-subnet --gateway 10.0.0.1 10.0.0.0/24
Created a new subnet:
+------------------+--------------------------------------------+
| Field | Value |
+------------------+--------------------------------------------+
| allocation_pools | {"start": "10.0.0.2", "end": "10.0.0.254"} |
| cidr | 10.0.0.0/24 |
| dns_nameservers | |
| enable_dhcp | True |
| gateway_ip | 10.0.0.1 |
| host_routes | |
| id | 7f103f72-1d77-48d9-a4eb-fdb10c6dc11d |
| ip_version | 4 |
| name | demo-subnet |
| network_id | df86ab38-57f2-432b-8ea8-ef30ceb72607 |
| tenant_id | 8c9fb6577a1e45879f35e3e43b34de58 |
+------------------+--------------------------------------------+
[root@controller1 ~]# neutron router-create demo-router
Created a new router:
+-----------------------+--------------------------------------+
| Field | Value |
+-----------------------+--------------------------------------+
| admin_state_up | True |
| external_gateway_info | |
| id | d2e481dd-a624-4447-8ea7-54fac383ec52 |
| name | demo-router |
| status | ACTIVE |
| tenant_id | 8c9fb6577a1e45879f35e3e43b34de58 |
+-----------------------+--------------------------------------+
[root@controller1 ~]# neutron router-interface-add demo-router demo-subnet
uter demo-router
neutron router-gateway-set demo-router ext-net
Added interface 628fbec4-625b-4b03-a2c5-92666cbc72af to router demo-router.
[root@controller1 ~]# #Set gateway for router demo-router
[root@controller1 ~]# neutron router-gateway-set demo-router ext-net
Set gateway for router demo-router
On Network Node

Edit /etc/neutron/l3_agent.ini and add following details
handle_internal_only_routers = True
gateway_external_network_id = ****.*****.*****.*****.****
external_network_bridge = br-ex

As per above example
handle_internal_only_routers = True
gateway_external_network_id = 2fdfff06-5837-4ab8-b971-c08696165e9d
external_network_bridge = br-ex
Adding the Second Network

On Network Node

ovs-vsctl add-br br-ex-2
ovs-vsctl add-port br-ex-2 eth3
On Controller Node

[root@controller1 ~]# source /root/admin-openrc.sh
[root@controller1 ~]# neutron net-create ext-net-2 --shared --router:external=True
Created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | 19b85183-9637-4bea-9b26-92caf2a5cb99 |
| name | ext-net-2 |
| provider:network_type | gre |
| provider:physical_network | |
| provider:segmentation_id | 3 |
| router:external | True |
| shared | True |
| status | ACTIVE |
| subnets | |
| tenant_id | 8c9fb6577a1e45879f35e3e43b34de58 |
+---------------------------+--------------------------------------+
[root@controller1 ~]# neutron subnet-create ext-net-2 --name ext-subnet-2 --allocation-pool start=192.168.11.50,end=192.168.11.254 --disable-dhcp --gateway 192.168.11.1 192.168.11.0/24
Created a new subnet:
+------------------+-----------------------------------------------+
| Field | Value |
+------------------+-----------------------------------------------+
| allocation_pools | {"start": "192.168.11.50", "end": "192.168.11.254"} |
| cidr | 192.168.11.0/24 |
| dns_nameservers | |
| enable_dhcp | False |
| gateway_ip | 192.168.11.1 |
| host_routes | |
| id | 92dcc66d-00a3-4678-a8ac-9d72a94613ed |
| ip_version | 4 |
| name | ext-subnet-2 |
| network_id | 19b85183-9637-4bea-9b26-92caf2a5cb99 |
| tenant_id | 8c9fb6577a1e45879f35e3e43b34de58 |
+------------------+-----------------------------------------------+
[root@controller1 ~]# neutron router-create demo-router-2
Created a new router:
+-----------------------+--------------------------------------+
| Field | Value |
+-----------------------+--------------------------------------+
| admin_state_up | True |
| external_gateway_info | |
| id | e9e194bb-dafe-4e41-b867-0a64c2e74e29 |
| name | demo-router-2 |
| status | ACTIVE |
| tenant_id | 8c9fb6577a1e45879f35e3e43b34de58 |
+-----------------------+--------------------------------------+
[root@controller1 ~]# neutron router-gateway-set demo-router-2 ext-net-2
Set gateway for router demo-router-2
[root@controller1 ~]# neutron net-create demo-net-2
Created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | f6238c45-9de4-4869-ad3e-cf3d1a647285 |
| name | demo-net-2 |
| provider:network_type | gre |
| provider:physical_network | |
| provider:segmentation_id | 4 |
| shared | False |
| status | ACTIVE |
| subnets | |
| tenant_id | 8c9fb6577a1e45879f35e3e43b34de58 |
+---------------------------+--------------------------------------+
[root@controller1 ~]# neutron subnet-create demo-net-2 --name demo-subnet-2 --gateway 10.1.0.1 10.1.0.0/24
Created a new subnet:
+------------------+--------------------------------------------+
| Field | Value |
+------------------+--------------------------------------------+
| allocation_pools | {"start": "10.1.0.2", "end": "10.1.0.254"} |
| cidr | 10.1.0.0/24 |
| dns_nameservers | |
| enable_dhcp | True |
| gateway_ip | 10.1.0.1 |
| host_routes | |
| id | 30bcb484-e7e7-42a5-9a08-b7364f94180a |
| ip_version | 4 |
| name | demo-subnet-2 |
| network_id | f6238c45-9de4-4869-ad3e-cf3d1a647285 |
| tenant_id | 8c9fb6577a1e45879f35e3e43b34de58 |
+------------------+--------------------------------------------+
[root@controller1 ~]# neutron router-interface-add demo-router-2 demo-subnet-2
Added interface daa4f64d-117c-49ee-a5b6-430c837a59d5 to router demo-router-2.
[root@controller1 ~]#

On Network Node

Edit /etc/neutron/l3_agent.ini and add following details
handle_internal_only_routers = False
gateway_external_network_id = ****.*****.*****.*****.****
external_network_bridge = br-ex

As per above example
handle_internal_only_routers = False
gateway_external_network_id = 19b85183-9637-4bea-9b26-92caf2a5cb99
external_network_bridge = br-ex-2

[root@neutron1 ~]# cp /etc/init.d/neutron-l3-agent /etc/init.d/neutron-l3-agent-2

Make the change in the following Lines to get the difference command as below
[root@neutron1 ~]# diff -n /etc/init.d/neutron-l3-agent /etc/init.d/neutron-l3-agent-2
d3 1
a3 1
# neutron-l3-agent-2 OpenStack Neutron Layer 3 Agent
d18 1
a18 1
"/etc/$proj/l3_agent-2.ini" \
d21 1
a21 1
pidfile="/var/run/$proj/$prog-2.pid"
d23 1
a23 1
[ -e /etc/sysconfig/$prog-2 ] && . /etc/sysconfig/$prog-2
d25 1
a25 1
lockfile=/var/lock/subsys/$prog-2
d32 2
a33 3
echo -n $"Starting $prog-2: "
daemon --user neutron --pidfile $pidfile "$exec --log-file /var/log/$proj/$plugin-2.log --config-file /usr/share/neutron/neutron-dist.conf --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/l3_agent-2.ini --config-file /etc/neutron/fwaas_driver.ini &>/dev/null & echo \$! > $pidfile"

d41 2
a42 2
echo -n $"Stopping $prog-2: "
killproc -p $pidfile $prog-2
[root@neutron1 ~]#

[root@neutron1 ~]# chkconfig neutron-l3-agent-2 on
[root@neutron1 ~]# openstack-service restart
Stopping neutron-dhcp-agent: [ OK ]
Starting neutron-dhcp-agent: [ OK ]
Stopping neutron-l3-agent: [ OK ]
Starting neutron-l3-agent: [ OK ]
Stopping neutron-l3-agent-2: [ OK ]
Starting neutron-l3-agent-2: [ OK ]
Stopping neutron-metadata-agent: [ OK ]
Starting neutron-metadata-agent: [ OK ]
Stopping neutron-openvswitch-agent: [ OK ]
Starting neutron-openvswitch-agent: [ OK ]
[root@neutron1 ~]#