Hugo Pot

The network connection of instance has been lost after restart Nova-Network host   In my consideration , all services should not affect others while restart/stop service within cloud platform... That means instances connection should be alive while admin restart nova-network host , but it won't work as your expectation. I faced this issue one month ago. And I spend around 1 hour to understand what's going on with this problem. In regular nova deployment , nova-network host is the gateway of all instances.  This Linux network box works like a router.  So that has a ARP table over the box. In my test , if the flat_interface(or vlan_interface)  do not auto up after reboot , the box will lose ARP table. And you can not ping or ssh  instance anymore.  While you up the nic manually , you have to wait for ARP rebuild .

Link from  http://gigaom.com/cloud/openstack-turns-1-whats-next/?utm_source=earth2tech&utm_medium=specialtopics OpenStack, the open-source, cloud-computing software project founded by Rackspace and NASA, celebrates its first birthday tomorrow. It has been a busy year for the project, which appears to have grown much fas ter than even its founders expected it would. A year in, OpenStack is still picking up steam and looks not only like an open source alternative to Amazon Web Services and VMware vCloud in the public Infrastructure as a Service space, but also a democratizing force in the private-cloud software space. Let’s take a look at what happened in the past year — at least what we covered — and what to expect in the year to come.

There's a easy way to build UEC tarball for me From an exist Ubuntu instance...... !!Still in test!! Very smooth in Maverick , but failed with Natty server b64 === In instance == 1. source novarc to import environment variable     2. bundle a virtual disk, don't specify the kernel id   #euca-bundle-vol -d destination_of_img -p name_of_image -s img_size

找我請到IRC的 freenode #openstack #openstack-dev 頻道 謝謝.....blogger 這樣討論效率不是很高 ID hugokuo

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The method to bundle WinXP image  Refference   [CSS group] Image management I'm using WinXP b32 Eng. On a linux host and kvm is installed inside this machine , Actually , you can use nova-compute node

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The network range is not big enough to fit 256. Network size is 256 Command failed, please check log for more info https://answers.launchpad.net/nova/+question/163627 https://answers.launchpad.net/nova/+question/163695 As Vish mentioned in the above QA link . Due to the multi_nic feature support , network creating has some changes . You have to add a "label" in cmd example: Older version #nova-manage network create 1.2.3.4/24 1 256 Trunk(r1245 for me) #nova-manage network create label_flag 1.2.3.4/24 1 256 In my knowing , label could be "public" or "private" currently. Not sure the difference of labels, still seeking more info about this change . I'll appreciate any further info from you.

The most powerful one of those three network modes in Nova Let's have a look at VlanManager Benefits: Support VPN End user could access their own project instances with VPN feature. Through a cloud-pipe instance which is a simple image include OPENVPN. It make user manage instance easier without lots of public ip. Isolation Vlan netwotk Per project/Per Vlan , a bunch of instance within a project will not communicate with other project instance. 1. enable Vlan support in kernel root@nova:~# dmesg | grep -i 802 [ 8.346579] 802.1Q VLAN Support v1.8 Ben Greear If the vlan folder exist , means your kernel support Vlan root@nova:~# ls -l /proc/net/vlan total 0 -rw------- 1 root root 0 2011-07-05 21:57 config root@nova:~# modprobe -v 8021q root@nova:~# lsmod | grep 8021q 8021q 24326 0 garp 14471 1 8021q