| --- | Log | opened Wed Mar 26 00:00:11 2008 |
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| 00:21 | <tessier_> | argh |
| 00:21 | <tessier_> | The second domain migration I do on this new setup and the migration fails and leaves me with a zombie |
| 00:22 | <tessier_> | Migration seems to be one of the more buggy parts of xen |
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| 17:49 | <tessier> | Any xen networking experts here? I'm having some troubles resolving this: http://lists.xensource.com/archives/html/xen-users/2008-03/msg00694.html |
| 17:52 | <murb> | tessier: what happens if you manually set the mtu? |
| 17:52 | <murb> | after the domU has booted? |
| 17:53 | <tessier> | murb: it works! |
| 17:53 | <tessier> | I can manually set the mtu no problem |
| 17:53 | <tessier> | I'm puzzled as to why I can't in the script |
| 17:54 | <tessier> | I have to reset the mtu on the bridge and the vif as they both get reset to 1500 when they go down and back up but as long as I set the mtu on the vif first and then the bridge it works no problem. |
| 17:54 | <tessier> | I'm nearly to the point of just writing a script which runs every 5 seconds and just sets the mtu's of all interfaces on the storage bridge and the bridge itself to 9000. |
| 17:54 | <murb> | tessier: is it something silly like set -e and a soemthign returning 1? |
| 17:54 | <tessier> | Just because I need to get this stuff into production soon. Been way too long messing with it. |
| 17:55 | <tessier> | + ip link set vif29.1 mtu 9000 |
| 17:55 | <tessier> | SIOCSIFMTU: Invalid argument |
| 17:55 | <tessier> | ++ sigerr |
| 17:55 | <tessier> | ++ fatal '/etc/xen/scripts/vif-bridge failed; error detected.' |
| 17:55 | <tessier> | Not something returning 1 it seems. |
| 17:56 | <murb> | tessier: ip link set vif29.1 up first? |
| 17:56 | <murb> | or possibly down? |
| 17:56 | <murb> | tessier: maybe the interface has to be up or down before you try that? |
| 17:56 | <tessier> | + brctl addif stbr0 vif29.1 |
| 17:56 | <tessier> | + ip link set vif29.1 up |
| 17:56 | <tessier> | + '[' stbr0 = stbr0 ']' |
| 17:56 | <tessier> | + ip link set vif29.1 mtu 9000 |
| 17:56 | <tessier> | SIOCSIFMTU: Invalid argument |
| 17:57 | <tessier> | There's the previous few lines |
| 17:57 | <tessier> | The link is already up |
| 17:57 | <murb> | if you do the ip link set before it is added to the bridge? |
| 17:57 | <murb> | i mean mtu |
| 17:58 | <tessier> | I tried that. Same error. |
| 17:58 | <murb> | but if you leave it at 1500 and do it manually it def. works? |
| 17:59 | <murb> | hmm i'll see if this happens to me. |
| 18:00 | <tessier> | Yep. Definitely. Every time. |
| 18:00 | <tessier> | After the domU is running I set the vif to 9000 then reset the bridge to 9000 and it's all good. |
| 18:00 | <murb> | oh good point, maybe you have to wait until the frontend is connected? |
| 18:00 | <tessier> | hmmm |
| 18:01 | <tessier> | I have put a sleep 5 in there just in case something was settling... |
| 18:01 | <murb> | i think that will just block the device configuration. |
| 18:01 | <tessier> | But I'm not sure I've waited long enough to be sure that the frontend interface was actually up... |
| 18:02 | <tessier> | Let me try a really long wait to ensure that the frontend is up... |
| 18:03 | <murb> | why $dev rather than $vif ? |
| 18:04 | <tessier> | er...that might be a typo. Let me make sure I have it right... |
| 18:04 | <tessier> | in difference places in the startup scripts they use variously def or vif... |
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| 18:19 | <tessier> | Hmm...I waited 30 seconds and it still didn't work. Let's try a minute. |
| 18:19 | <tessier> | One annoying thing is that my xm create command doesn't return for a minute |
| 18:21 | <tessier> | Yep. Same error even after a minute. |
| 18:21 | <murb> | tessier: that won't help at all. |
| 18:21 | <murb> | because thescripts have to run before the domain is created i think. |
| 18:21 | <tessier> | Does it not create the vm? |
| 18:21 | <tessier> | hmm. |
| 18:21 | <murb> | no, you're blocking htat. |
| 18:21 | <tessier> | gotcha |
| 18:22 | <tessier> | Well that sucks. I can't do what I need to do in this script then. Is there some sort of post-create script that gets run? I already looked for that in xend-config.sxp and didn't see it anywhere. |
| 18:23 | <tessier> | I don't quite understand the relationship between the vif and the interface inside the domU anyway. It goes through some sort of black magic tunnel to go from one universe to the other. |
| 18:36 | <tessier> | Yes! /sys/class/net/stbr0/brif/ contains all of the interfaces currently on the storage bridge. I'll just write a script to run over those and set the mtu's. |
| 18:41 | <tessier> | for file in /sys/class/net/stbr0/brif/*; do |
| 18:41 | <tessier> | interface=`basename $file` |
| 18:41 | <tessier> | echo $interface |
| 18:41 | <tessier> | ip link set $interface mtu 9000 |
| 18:41 | <tessier> | done |
| 18:41 | <tessier> | Cron it to run every minute. Done. |
| 18:41 | <tessier> | It's crap but it'll do for now. |
| 18:45 | <murb> | for file in /sys/class/net/stbr0/brif/* ; do |
| 18:45 | <murb> | echo 9000 >${file}/mtu |
| 18:45 | <murb> | done |
| 18:47 | <murb> | oh that won't work. |
| 18:49 | <murb> | as the mtu is in ../ from the symlink. |
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| --- | Log | closed Thu Mar 27 00:00:49 2008 |
