Instance can not get metadata..........

It actually isn't a metadata problem.. Dhcp is failing (Note the sending discover and No lease) it looks like it is trying to get an ip in this range:
> inet 192.168.2.1/24 brd 192.168.2.255 scope global br100

A few possibilities:

dnsmasq is not running properly (ps ax | grep dnsmasq should show exactly two dnsmasq processes with the exact same long command line)
you missed a flag like --dhcp_listen_address and so it is attempting to listen on 10.0.0.2 (check ps ax | grep dnsmasq) and see if it shows the wrong number --dhcp-range=10.0.0.2,static,120s) Fix this by setting the flag properly and also updating the networks table in the db.
likely you will see DHCP messages in /var/log/messages or /var/log/syslog with errors

Vish

On Apr 8, 2011, at 4:25 AM, Hugo Kou wrote:

> New question #152089 on OpenStack Compute (nova):
> https://answers.launchpad.net/nova/+question/152089
>
> There's my topology, It's a multi nodes archi that separate nova-network into a single box
> http://1.bp.blogspot.com/-KsV9TEoTjk4/TZ7cAlQMFEI/AAAAAAAACko/Jrjb3cczPcI/s1600/current.png
>
>
> ============euca-get-console-out-put==================
> bringing up loopback interface lo [ OK ]
> stty: \/dev\/console
> udhcpc (v1.17.2) started
> Sending discover...
> Sending discover...
> Sending discover...
> No lease, forking to background
> starting DHCP forEthernet interface eth0 [ OK ]
> cloud-setup: checking http:\/\/169.254.169.254\/2009-04-04\/meta-data\/instance-id
> wget: can't connect to remote host (169.254.169.254): Network is unreachable
> cloud-setup: failed 1\/30: up 10.46. request failed
> wget: can't connect to remote host (169.254.169.254): Network is unreachable
> cloud-setup: failed 2\/30: up 11.47. request failed
> wget: can't connect to remote host (169.254.169.254): Network is unreachable
> cloud-setup: failed 3\/30: up 12.49. request failed
> wget: can't connect to remote host (169.254.169.254): Network is unreachable
> cloud-setup: failed 4\/30: up 13.50. request failed
> wget: can't connect to remote host (169.254.169.254): Network is unreachable
> cloud-setup: failed 5\/30: up 14.52. request failed
> wget: can't connect to remote host (169.254.169.254): Network is unreachable
> cloud-setup: failed 6\/30: up 15.53. request failed
> wget: can't connect to remote host (169.254.169.254): Network is unreachable
> cloud-setup: failed 7\/30: up 16.55. request failed
> wget: can't connect to remote host (169.254.169.254): Network is unreachable
> cloud-setup: failed 8\/30: up 17.56. request failed
> wget: can't connect to remote host (169.254.169.254): Network is unreachable
> cloud-setup: failed 9\/30: up 18.58. request failed
>
> ==========iptables-save==on nova-network host==========
> *nat
> :PREROUTING ACCEPT [2:636]
> :OUTPUT ACCEPT [8:504]
> :POSTROUTING ACCEPT [8:504]
> :nova-network-OUTPUT - [0:0]
> :nova-network-POSTROUTING - [0:0]
> :nova-network-PREROUTING - [0:0]
> :nova-network-floating-snat - [0:0]
> :nova-network-snat - [0:0]
> :nova-postrouting-bottom - [0:0]
> -A PREROUTING -j nova-network-PREROUTING
> -A OUTPUT -j nova-network-OUTPUT
> -A POSTROUTING -j nova-network-POSTROUTING
> -A POSTROUTING -j nova-postrouting-bottom
> -A nova-network-POSTROUTING -s 192.168.2.0/24 -d 10.128.0.0/24 -j ACCEPT
> -A nova-network-POSTROUTING -s 192.168.2.0/24 -d 192.168.2.0/24 -j ACCEPT
> -A nova-network-PREROUTING -d 169.254.169.254/32 -p tcp -m tcp --dport 80 -j DNAT --to-destination 192.168.1.1:8773
> -A nova-network-snat -j nova-network-floating-snat
> -A nova-network-snat -s 192.168.2.0/24 -j SNAT --to-source 192.168.1.1
> -A nova-postrouting-bottom -j nova-network-snat
> COMMIT
> # Completed on Fri Apr 8 19:02:27 2011
> # Generated by iptables-save v1.4.4 on Fri Apr 8 19:02:27 2011
> *filter
> :INPUT ACCEPT [18191:1530656]
> :FORWARD ACCEPT [0:0]
> :OUTPUT ACCEPT [35418:2835137]
> :nova-filter-top - [0:0]
> :nova-network-FORWARD - [0:0]
> :nova-network-INPUT - [0:0]
> :nova-network-OUTPUT - [0:0]
> :nova-network-local - [0:0]
> -A INPUT -j nova-network-INPUT
> -A FORWARD -j nova-filter-top
> -A FORWARD -j nova-network-FORWARD
> -A OUTPUT -j nova-filter-top
> -A OUTPUT -j nova-network-OUTPUT
> -A nova-filter-top -j nova-network-local
> COMMIT
> # Completed on Fri Apr 8 19:02:27 2011
> =====================================
>
> I tried everything , but still failed to get metadata
>
> Nova-network create a bridge "br100" for flat network and add eth0 to br100.
>
> ===========ip addr show====on nova-network host==========
> 1: 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
> inet 169.254.169.254/32 scope link lo
> inet6 ::1/128 scope host
> valid_lft forever preferred_lft forever
> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
> link/ether 00:0e:7b:d0:05:ef brd ff:ff:ff:ff:ff:ff
> inet6 fe80::20e:7bff:fed0:5ef/64 scope link
> valid_lft forever preferred_lft forever
> 3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN qlen 1000
> link/ether 00:19:d2:22:70:51 brd ff:ff:ff:ff:ff:ff
> 4: br100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
> link/ether 00:0e:7b:d0:05:ef brd ff:ff:ff:ff:ff:ff
> inet 192.168.2.1/24 brd 192.168.2.255 scope global br100
> inet 192.168.1.2/24 brd 192.168.1.255 scope global br100
> inet6 fe80::7e:7aff:fe1f:1974/64 scope link
> valid_lft forever preferred_lft forever
>
> =====================================
>
> Could someone give me some clues about this issue? I face this problem several times.
>
> I really want to know what's the problem over there.
>
> In my knowing , instance try to get metadata while a instance run up through 169.254.169.254:80 .
>
> and then send discovery from on br100 , at this moment , nova-netowork will assign a ip to instance. then try to get metadata. due to instance's gateway is nova-network's br100 , So that nova-network should route 169.254.169.254 request to nova-api server . That's the reason of iptable prerouting to $nova-api_ip:8773.
>
> ok, I check everything . but instance still can not been ssh or ping . After check console-out-put, I saw the result as above.
>
> Thanks you guys first. Plz correct my mistake.
>
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