[Openstack] vm instances could not get ip address from dhcp agent

Remo Mattei remo at mattei.org
Wed Dec 18 20:36:14 UTC 2013


That command does not work on yum 
You may have to compile it. 

Remo

Inviato da iPhone ()

> Il giorno Dec 18, 2013, alle ore 12:07, <Yuling_C at DELL.com> ha scritto:
> 
> Hi Pranav,
>  
> Thanks for the reply. Actually I’m using Redhat. Do you think we can execute the same command to recompile the Kernal?
>  
> Also, another behavior that really concerned me was that ‘brctl show’ does not list anything when we create the VM instances. Does this indicate that integration bridge is not functioning?
>  
> Thanks,
>  
> YuLing
>  
> From: Pranav Salunke [mailto:pranav at aptira.com] 
> Sent: Wednesday, December 18, 2013 7:04 AM
> To: C, Yuling
> Cc: openstack at lists.openstack.org
> Subject: Re: [Openstack] vm instances could not get ip address from dhcp agent
>  
> Hi Yuling,
> 
> I am getting similar issues with Havana, but in my case I saw that OVS 1.10 shows build error while compiling its packages. Can you do
> 
> # dpkg-reconfigure openvswitch-datapath-dmks
> (assuming you are using ubuntu/debian)
> or something similar and check the output, esp. when its recompiling the kernel.
> 
> Regards,
> Pranav
> 
> --
> 
> Pranav Salunke
> Cloud Engineer
>  
> +91 97129 29850
> +612 8030 2333
> 1800 APTIRA
> aptira.com
> Follow @aptira
>  
> 
> On 18 December 2013 13:11, <Yuling_C at dell.com> wrote:
> Actually, I found that the tcpdump –i ‘tapf9884dcb-e5’ got dhcp reply. However, tcpdump –i br-int only has dhcp request.
>  
> Also, when I tried to get ip address on the dhcp agent, I was not able to see ‘tapf9884dcb-e5’
>  
> ip netns exec qdhcp-7e73481a-d100-46d4-8dd1-9b3bb7949333
> No cmd specified
> [root at blade04 quantum]# ip netns exec qdhcp-7e73481a-d100-46d4-8dd1-9b3bb7949333 ip address
> 15: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>     inet 127.0.0.1/8 scope host lo
>     inet6 ::1/128 scope host
>        valid_lft forever preferred_lft forever
> 18: ns-f9884dcb-e5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
>     link/ether fa:16:3e:a1:d5:e2 brd ff:ff:ff:ff:ff:ff
>     inet 30.0.0.3/24 brd 30.0.0.255 scope global ns-f9884dcb-e5
>     inet6 fe80::f816:3eff:fea1:d5e2/64 scope link
>        valid_lft forever preferred_lft forever
>  
> Would this be an issue?
>  
> Thanks,
>  
> YuLing
> From: C, Yuling 
> Sent: Tuesday, December 17, 2013 9:37 PM
> To: 'openstack at lists.openstack.org'
> Subject: RE: vm instances could not get ip address from dhcp agent
>  
> B.T.W, I just noticed that ‘brctl show’ command does not show any attached interface on this test bed. Could this be the root cause?
> # brctl show
> bridge name     bridge id               STP enabled     interfaces
> virbr0          8000.525400046ff3       yes             virbr0-nic
>  
> Also, I saw error message as ‘2013-12-17 21:33:47.586 32628 ERROR nova.virt.libvirt.driver [-] Getting disk size of foreman: [Errno 2] No such file or directory: '/var/lib/libvirt/images/foreman.img'’.
>  
> Any clue?
>  
> Thanks,
>  
> YuLing
> From: C, Yuling 
> Sent: Tuesday, December 17, 2013 6:47 PM
> To: openstack at lists.openstack.org
> Subject: vm instances could not get ip address from dhcp agent
>  
> Hi All,
>  
> I have an openstack installation environment of two nodes. One node contains Controller, Network, Nova, Glance, Keystone, Client, and Cinder. The other node is just a nova_compute node.   Everything worked very well before. Suddenly we hit the issue that vm instances could not get ip addresses from dhcp agent.  I looked into dhcp-agent.log, but didn’t find much useful information. Just wondering if someone could shed some light on this issue.
>  
> The behavior is that even the VMs created on node1, which contains Controller, Network, Nova, Glance, keystone, Client and Cinder could not get the IP from dhcp agent. When I use tcpdump –i br-ehter1, or tcpdump –i < physical Ethernet port id>, I was able to see the DHCP requests, but no reply from dhcp agent.
>  
> Any idea?
>  
> Thanks,
>  
> YuLing
>  
> 
>  
> 
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