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Date: Thu, 12 Mar 2015 17:15:38 +0000 (UTC)
From: "Ivan A Kudryavtsev (JIRA)" <jira@apache.org>
To: cloudstack-issues@incubator.apache.org
Message-ID: <JIRA.12781558.1426180410000.76880.1426180538122@Atlassian.JIRA>
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Subject: [jira] [Updated] (CLOUDSTACK-8326) Bug in cloudstack virtual router
 (KVM) in Simple zone with public ips / DHCP Debian Wheezy specific
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     [ https://issues.apache.org/jira/browse/CLOUDSTACK-8326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ivan A Kudryavtsev updated CLOUDSTACK-8326:
-------------------------------------------
    Description: 
I've found bug in DHCP component of VR 4.3.2. The bug is completely described at:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=717217
DHCP responses with bad checksum. As a result, dhcp client unable to get lease: "dhcpd: 5 bad udp checksums in 5 packets"
Hotfix is:
iptables -A POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM --checksum-fill

on VR.

  was:
I've found several bugs in DHCP script /root/edithosts.sh

here:
\# don't want to do this in the future, we can have same VM with multiple nics/entries
\# sed \-i /,$host,/d $DHCP_HOSTS <- commented
and the same clear for $HOSTS file

Actually, this causes that if someone creates VM with some name, removes it and creates again, then dnsmasq fails to lease DHCP offer because of such message in 

/var/log/messages-*
Feb 18 13:41:44 r-1184-VM dnsmasq[2640]: not giving name bill.domain to the DHCP lease of 176.XX.25.76 because the name exists in /etc/hosts with address 176.XX.25.130
Feb 18 13:41:44 r-1184-VM dnsmasq[2640]: not giving name bill to the DHCP lease of 176.XX.25.76 because the name exists in /etc/hosts with address 176.XX.25.130

The second bug is that /etc/sysctl.conf is not invoked during startup (it's known Squeeze issue), that could be fixed in the /etc/rc.local like

/etc/init.d/procps restart

otherwise there are conntrack errors in dmesg.


> Bug in cloudstack virtual router (KVM) in Simple zone with public ips / DHCP Debian Wheezy specific
> ---------------------------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-8326
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8326
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: KVM, Virtual Router
>    Affects Versions: 4.3.2
>         Environment: Ubuntu 12.04.5 for Host
> Debian Squeeze for VR
>            Reporter: Ivan A Kudryavtsev
>
> I've found bug in DHCP component of VR 4.3.2. The bug is completely described at:
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=717217
> DHCP responses with bad checksum. As a result, dhcp client unable to get lease: "dhcpd: 5 bad udp checksums in 5 packets"
> Hotfix is:
> iptables -A POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM --checksum-fill
> on VR.


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