connetc instance from dashboard by novncproxy failed

dear all, i have a question that i cannot connect an instance from dashboard by novncproxy.

i cannot connect the instance from dashboard. I have 11 machines to build the cloud.keystone,glance,dashboard,mysql and nova were installed on the controller(192.168.80.10/192.168.78.10) . And glance ,nova are also are installed other machines.
my question is that nova-consoleauth is needed to install on every machine???

And nova-novncproxy is also needed to install on every machine???

That is the machine's (192.168.80.11/192.168.78.11)nova.conf

[DEFAULT]
verbose=True
auth_strategy=keystone
allow_resize_to_same_host=True
compute_scheduler_driver=nova.scheduler.filter_scheduler.FilterScheduler
dhcpbridge_flagfile=/etc/nova/nova.conf
fixed_range=10.0.3.0/24
flat_network_dhcp_start=10.0.3.2
s3_host=192.168.78.10
network_manager=nova.network.manager.FlatDHCPManager
volume_group=nova-volumes
volume_name_template=volume-%08x
iscsi_helper=tgtadm
iscsi_ip_prefix=192.168.80.
osapi_compute_extension=nova.api.openstack.compute.contrib.standard_extensions
my_ip=192.168.78.10
public_interface=eth0
flat_interface=eth0
floating_range=192.168.81.0/24
flat_network_bridge=br100
sql_connection=mysql://nova:nova@192.168.78.10/nova
libvirt_type=kvm
instance_name_template=instance-%08x
novncproxy_base_url=http://192.168.80.10:6080/vnc_auto.html
xvpvncproxy_base_url=http://192.168.80.10:6081/console
vncserver_listen=192.168.80.10
vncserver_proxyclient_address=192.168.80.10
api_paste_config=/etc/nova/api-paste.ini
image_service=nova.image.glance.GlanceImageService
ec2_dmz_host=192.168.78.10
rabbit_host=192.168.78.10
rabbit_password=guest
glance_api_servers=192.168.78.10:9292
force_dhcp_release=True
connection_type=libvirt
firewall_driver=nova.virt.libvirt.firewall.IptablesFirewallDriver
logdir=/var/log/nova
multi_host=true

and my /etc/init/nova-novncproxy.conf was wrote "exec /opt/stack/noVNC/utils/nova-novncproxy --config_file /etc/nova/nova.conf --web /opt/stack/noVNC -d --debug"

What is wrong with me ??? Thankyou!