Sunday, 2011-03-13

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openstackhudsonProject nova build #633: SUCCESS in 1 min 58 sec: http://hudson.openstack.org/job/nova/633/16:18
openstackhudsonTarmac: Fix instructions for setting up the initial database.16:18
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thielmann__Could someone help me with floating IPs? I added a single (/32) IP with nova-manage. euca-associate seems to work, describe shows the instance has the IP connected. Unfortunately, if I ping or SSH (from host) I end up on the host, rather on the instance. There's no route to the instance from outside. (Singe host install, single network connection, four public IPs). Any ideas?17:32
thielmann__Maybe someone could point out which commands euca-associate runs, so I could test them manually?17:32
kpepplethielmann__: this isn't my area of expertise ... but maybe i can help narrow down the problem. i assume you can 'nova-manage floating list' your addresses ?17:35
thielmann__kpepple: Yes (thanks again for helping .->)17:36
kpepplethielmann__: so it looks like associate floating gets down to business in nova/network/manager.py:202 where it registers in the db, binds the ip and then ensures forwarding. let me see what those actually do.17:38
kpepplethielmann__: bind_floating executes a "sudo ip addr add <float_ip> dev <public interface>"17:39
thielmann__kpepple: I guess it does more. During yesterdays tests I found (in the logs) it somehow starts a NAT with iptables (like sudo iptables --delete PREROUTING -t nat -d 89.238.83.56 -j DNAT --to 10.0.1.8). When I try both, it still doesn't work (no error though). So I thought nova tries something additional.17:41
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thielmann__kpepple: And do I need to configure the IP before? How does the system know how to route?17:42
kpepplethielmann__: ensure_floating_forward adds a rule to the nat4 table that does something ... you can look at it in nova/network/linux_net.py:435 ish17:43
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kpepplethielmann__: AFAIK nova pulls the IP from the floating pool you set up with nova-manage, uses your public interface variable and then the VM ip address to create the forwarding rule. i am assuming that the problem is with the forwarding rule.17:45
kpepplethielmann__: i would list out your iptables and go through it looking for the specific rules for your VMs IPs17:47
thielmann__kpepple: Yes, unfortunately, I have near to zero clue about iptables ("chains", "tables") and none about python.  :-). I already listed the iptables entries (via -L) and I can't find them. I guess there hidden in some table/chain and I've got no clue how to find them.17:47
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openstackhudsonProject nova-bexar-tarmc build #7,174: FAILURE in 2 min 25 sec: http://hudson.openstack.org/job/nova-bexar-tarmc/7174/17:53
thielmann__kpepple: This is my iptables-save: http://paste.openstack.org/show/885/ Maybe you can see a problem, I can't :-)17:55
kpepplethielmann__: what's the VM instance's IP address ?17:55
thielmann__10.0.1.1417:55
openstackhudsonYippie, build fixed!17:56
openstackhudsonProject nova-bexar-tarmc build #7,175: FIXED in 2.6 sec: http://hudson.openstack.org/job/nova-bexar-tarmc/7175/17:56
kpepplethielmann__: what's the floating IP address you were associating ?17:56
thielmann__kpepple: 89.238.83.55/3217:56
kpepplethielmann__: ok. there are three rules added by the floating_forward_rules: PREROUTING, OUTPUT and floating-snat17:57
kpepplethielmann__: PREROUTING is on line 717:58
kpepplethielmann__: i think floating-snat is on line 1517:59
kpepplethielmann__: i'm not seeing the output rule18:01
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thielmann__kpepple: Could you give me a command? There might be an error output. BTW: If I use the instance, I can access the net as .55". So it's "just" that no traffic comes in ...18:02
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kpepplethielmann__: it seems like the command should be "iptables -A OUTPUT -d 89.238.83.55 -j DNAT --to 10.0.1.14"18:05
kpepplethielmann__: yeah, you should back up your iptables BEFORE you do that command ... just in case18:07
thielmann__"iptables: Invalid argument. Run `dmesg' for more information." dmesg: "ip_tables: DNAT target: only valid in nat table, not filter"18:07
thielmann__kpepple: If the command is the same nova uses, it might be a problem with the iptables version?18:08
kpepplethielmann__: what os are you on ?18:08
thielmann__kpepple: Ubuntu 10.0418:08
kpepplethielmann__: i'm using iptables v1.4.4 on ubuntu 10.1018:08
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thielmann__kpepple: It's the same version on 10.04, so that can't be the problem...18:09
thielmann__kpepple: If I add a "-t nat" to the command, my iptables-save stays the same. Strange...18:12
kpepplethielmann__: what happens when you do the "sudo iptables -t nat -L" ?18:12
kpepplethielmann__: interested in the "nova-network-snat" section18:13
kpepplethielmann__: and the "nova-compute-floating-snat" section18:13
thielmann__kpepple: http://paste.openstack.org/show/886/ Can't see the sections you mentioned.18:15
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kpepplethielmann__: my output (VLAN) looks quite a bit different http://paste.openstack.org/show/887/18:21
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openstackhudsonProject nova-bexar-tarmc build #7,182: FAILURE in 4 min 12 sec: http://hudson.openstack.org/job/nova-bexar-tarmc/7182/18:35
openstackhudsonProject nova-tarmac build #68,980: FAILURE in 2 min 31 sec: http://hudson.openstack.org/job/nova-tarmac/68980/18:35
openstackhudsonYippie, build fixed!18:37
openstackhudsonProject nova-bexar-tarmc build #7,183: FIXED in 1.9 sec: http://hudson.openstack.org/job/nova-bexar-tarmc/7183/18:37
openstackhudsonYippie, build fixed!18:39
openstackhudsonProject nova-tarmac build #68,981: FIXED in 2 min 35 sec: http://hudson.openstack.org/job/nova-tarmac/68981/18:39
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thielmann__kpepple: Unfortunately, I can't find the error, even with your iptables. Tried it manually, but no success right now. It's really a pity, since I came so far and all I need now is incoming traffic :-)18:46
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openstackhudsonProject nova-tarmac build #68,983: FAILURE in 2 min 36 sec: http://hudson.openstack.org/job/nova-tarmac/68983/18:49
kpepplethielmann__: the iptables debugging is hard. vishy and ryan are much better than i am at it.18:50
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openstackhudsonProject dashboard-tarmac build #11,374: FAILURE in 1 min 51 sec: http://hudson.openstack.org/job/dashboard-tarmac/11374/18:53
openstackhudsonYippie, build fixed!18:56
openstackhudsonProject nova-tarmac build #68,984: FIXED in 2 min 32 sec: http://hudson.openstack.org/job/nova-tarmac/68984/18:56
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openstackhudsonYippie, build fixed!18:58
openstackhudsonProject dashboard-tarmac build #11,375: FIXED in 51 sec: http://hudson.openstack.org/job/dashboard-tarmac/11375/18:58
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