Hi everyone,
I'm running with Essex 2012.1, and have some questions about the nova network operation, 1. Is it possible manually assigned IP address to a launched instance, my situation is : after instance boot up (OS: CentOS 6.2), I changed the /etc/sysconfig/network-scripts/ifcfg-eth0 setting from dhcp to static (the same subnet as created by command : nova-manage create network....), and restart the network service, And then I couldn't ssh or ping the instance from other server with the same subnet. What is the problem ? I checked the iptables policies on the compute host, and find nothing about the DROP packets. I also tried to change the DB record from nova.fixed_ips table and libvirt.xml of the instance directory, then reboot the instance, I can see the instance get new IP from DHCP, but still not worked(can't ping & ssh). I used FlatDHCP as my network manager. 2. According to the first question, I have another requirement to set up a loopback IP address (lo:0) on the running instance, after setting completed,I couldn't ping or ssh the loopback IP from the same subnet, and I tried to set a alias IP address with eth0:0, but still not get worked. Any ideas with this ? 3. Is there any way to use 2 NICs with different subnets on instances? I want to separate the network traffic. Now I'm running with one bridged interface (br100), and it works well. In order to backup the large log files, I'm planing to use 2 NICs for the compute hosts, I want use 2 vNICs on instance, one for web service and the other for log backup, I think I should create a new network for the second bridged interface, but I can't find any document to guild me. List my nova.conf below ========================================== --dhcpbridge_flagfile=/etc/nova/nova.conf --dhcpbridge=/usr/bin/nova-dhcpbridge --logdir=/var/log/nova --state_path=/var/lib/nova --lock_path=/var/lock/nova --allow_admin_api=true --use_deprecated_auth=false --auth_strategy=keystone --scheduler_driver=nova.scheduler.simple.SimpleScheduler --s3_host=172.19.7.1 --ec2_host=172.19.7.1 --rabbit_host=172.19.7.1 --cc_host=172.19.7.1 --nova_url=http://172.19.7.1:8774/v1.1/ #--routing_source_ip=172.19.7.1 --glance_api_servers=172.19.7.1:9292 --image_service=nova.image.glance.GlanceImageService #--iscsi_ip_prefix=192.168.22 --sql_connection=mysql://nova:nova@172.19.7.1/nova --ec2_url=http://172.19.7.1:8773/services/Cloud --keystone_ec2_url=http://172.19.7.1:5000/v2.0/ec2tokens --api_paste_config=/etc/nova/api-paste.ini --libvirt_type=kvm --libvirt_use_virtio_for_bridges=true --start_guests_on_host_boot=true --resume_guests_state_on_host_boot=true #--vnc_enabled=true --novnc_enabled=true #--vncproxy_url=http://172.19.7.1:6080/vnc_auto.html #--vnc_console_proxy_url=http://172.19.7.1:6080 --novncproxy_base_url=http://172.19.7.1:6080/vnc_auto.html --xvpvncproxy_base_url=http://172.19.7.1:6081/console #--vncserver_listen=172.19.7.1 #--vncserver_proxyclient_address=172.19.7.1 --vncserver_listen=0.0.0.0 --vncserver_proxyclient_address=0.0.0.0 # network specific settings --network_manager=nova.network.manager.FlatDHCPManager #--network_manager=nova.network.quantum.manager.QuantumManager #--quantum_connection_host=172.19.7.1 #--quantum_connection_port=9696 --public_interface=eth0 --flat_interface=eth0 --flat_network_bridge=br100 --fixed_range=172.19.7.0/24 --network_size=254 --flat_network_dhcp_start=172.19.7.41 --multi_host --flat_injected=False --force_dhcp_release --iscsi_helper=tgtadm --connection_type=libvirt --root_helper=sudo nova-rootwrap #--verbose #--verbose=true --verbose=false --libvirt_xml_template=/usr/share/pyshared/nova/virt/libvirt.xml.template --allow_resize_to_same_host=true --max_cores=30 ================================================= if I misunderstand something, please correct me, thanks. -Jimmy
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