can you paste the result of following command? cat /etc/dnsmasq.conf |grep -v "^#" |grep -v "^$"
-Wei 2016-11-07 20:27 GMT+01:00 Cloud List <cloud-l...@sg.or.id>: > Hi Wei, > > In addition, > > The VR is serving a shared not isolated network, meaning the IP it serves > is 'guest' not 'public' IP. Will that make a difference on the iptables > command we need to execute? > > Looking forward to your reply, thank you. > > Cheers. > > > On Tue, Nov 8, 2016 at 3:19 AM, Cloud List <cloud-l...@sg.or.id> wrote: > > > Hi Wei and Ozhan, > > > > Thanks for your reply. > > > > The problem doesn't affect only Debian-based guest VMs, but also affected > > some Windows and Ubuntu-based VMs as well. I have executed the command on > > the VR and reset the NIC of the guest VM, but unfortunately the issue > still > > persists. > > > > iptables -t mangle -A POSTROUTING -p udp -m udp --dport 68 -j CHECKSUM > > --checksum-fill > > > > After issuing the above command on VR and reset the NIC on guest vm > > (ifdown eth0, ifup eth0): > > > > On VR's /var/log/dnsmasq.log: > > > > Nov 7 19:09:22 dnsmasq-dhcp[18986]: DHCPDISCOVER(eth0) 06:b1:22:01:13:17 > > ignored > > Nov 7 19:09:25 dnsmasq-dhcp[18986]: DHCPDISCOVER(eth0) 06:b1:22:01:13:17 > > ignored > > Nov 7 19:09:30 dnsmasq-dhcp[18986]: DHCPDISCOVER(eth0) 06:b1:22:01:13:17 > > ignored > > Nov 7 19:09:36 dnsmasq-dhcp[18986]: DHCPDISCOVER(eth0) 06:b1:22:01:13:17 > > ignored > > > > On the guest VM: > > > > root@vm:~# ifup eth0 > > Internet Systems Consortium DHCP Client 4.2.2 > > Copyright 2004-2011 Internet Systems Consortium. > > All rights reserved. > > For info, please visit https://www.isc.org/software/dhcp > > > > Listening on LPF/eth0/06:b1:22:01:13:17 > > Sending on LPF/eth0/06:b1:22:01:13:17 > > Sending on Socket/fallback > > DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 > > DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 5 > > DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 64DHCPDISCOVER > on > > eth0 to 255.255.255.255 port 67 interval 14 > > DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 > > DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 10 > > DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 13 > > No DHCOFFERS received. > > No working leases in persistent database - sleeping. > > > > I also tried to execute similar hotfix as mentioned on the bug report: > > > > iptables -A POSTROUTING -t mangle -p udp --dport bootpc -j CHECKSUM > > --checksum-fill > > > > The problem still persists. Any further advice on this is highly > > appreciated. > > > > Looking forward to your reply, thank you. > > > > Cheers. > > > > > > On Tue, Nov 8, 2016 at 2:41 AM, Wei ZHOU <ustcweiz...@gmail.com> wrote: > > > >> GOOD point. > >> > >> @CloudList, can you try again after executing the following command in > VR > >> ? > >> > >> iptables -t mangle -A POSTROUTING -p udp -m udp --dport 68 -j CHECKSUM > >> --checksum-fill > >> > >> -Wei > >> > >> 2016-11-07 14:46 GMT+01:00 Özhan Rüzgar Karaman < > oruzgarkara...@gmail.com > >> >: > >> > >> > Hi; > >> > Whats your problematic vm's type is it Debian? Maybe you are affected > >> from > >> > the bug CLOUDSTACK-8326? I do not know if this bug has effected on ACS > >> 4.2 > >> > release but i know that it effects release 4.8.x 4.9.x > >> > > >> > Thanks > >> > Özhan > >> > > >> > On Mon, Nov 7, 2016 at 4:36 PM, Cloud List <cloud-l...@sg.or.id> > wrote: > >> > > >> > > Hi Wei, > >> > > > >> > > Thanks for your reply. > >> > > > >> > > I checked and I can confirm that the mac address is listed on > >> > > /etc/dhcphosts.txt in VR. > >> > > > >> > > For example: > >> > > > >> > > Nov 7 13:30:19 dnsmasq-dhcp[18986]: DHCPDISCOVER(eth0) > >> 06:31:ac:01:13:YY > >> > > ignored > >> > > Nov 7 13:30:24 dnsmasq-dhcp[18986]: DHCPDISCOVER(eth0) > >> 06:31:ac:01:13:YY > >> > > ignored > >> > > Nov 7 13:30:33 dnsmasq-dhcp[18986]: DHCPDISCOVER(eth0) > >> 06:31:ac:01:13:YY > >> > > ignored > >> > > > >> > > root@r-4155-VM:/var/log# grep 06:31:ac:01:13:f0 /etc/dhcphosts.txt > >> > > 06:31:ac:01:13:YY,X.X.X.X,vm-name,infinite > >> > > > >> > > YY - last two digits of the mac address > >> > > X.X.X.X - ip address which is supposed to be allocated to the VM > >> > > > >> > > Any advice how can I troubleshoot this further? > >> > > > >> > > Looking forward to your reply, thank you. > >> > > > >> > > Cheers. > >> > > > >> > > > >> > > On Mon, Nov 7, 2016 at 9:22 PM, Wei ZHOU <ustcweiz...@gmail.com> > >> wrote: > >> > > > >> > > > If the mac address is not listed in /etc/dhcphosts.txt in VR, the > >> > request > >> > > > will be ignored. > >> > > > > >> > > > Can you give more details so we can reproduce it and fix it ? > >> > > > > >> > > > -Wei > >> > > > > >> > > > 2016-11-07 13:44 GMT+01:00 Cloud List <cloud-l...@sg.or.id>: > >> > > > > >> > > > > Hi, > >> > > > > > >> > > > > After our upgrade from CloudStack 4.2 to 4.8.1.1, we noted that > >> some > >> > > (but > >> > > > > not all) of our VMs are not able to get DHCP from the VR. This > >> gives > >> > > > > problem when the VM is restarted and cannot get up and running > >> > because > >> > > > > unable to get IP. > >> > > > > > >> > > > > I logged in to the VR and found below messages showing that the > >> DHCP > >> > > > server > >> > > > > is ignoring the request from the VM. > >> > > > > > >> > > > > Nov 7 12:19:43 dnsmasq-dhcp[29938]: DHCPDISCOVER(eth0) > >> > > 06:44:da:01:13:98 > >> > > > > ignored > >> > > > > Nov 7 12:19:52 dnsmasq-dhcp[29938]: DHCPDISCOVER(eth0) > >> > > 06:05:64:01:13:d3 > >> > > > > ignored > >> > > > > Nov 7 12:19:53 dnsmasq-dhcp[29938]: DHCPDISCOVER(eth0) > >> > > 06:44:da:01:13:98 > >> > > > > ignored > >> > > > > Nov 7 12:20:04 dnsmasq-dhcp[29938]: DHCPDISCOVER(eth0) > >> > > 06:44:da:01:13:98 > >> > > > > ignored > >> > > > > Nov 7 12:20:11 dnsmasq-dhcp[29938]: DHCPDISCOVER(eth0) > >> > > 06:05:64:01:13:d3 > >> > > > > ignored > >> > > > > Nov 7 12:20:22 dnsmasq-dhcp[29938]: DHCPDISCOVER(eth0) > >> > > 06:44:da:01:13:98 > >> > > > > ignored > >> > > > > Nov 7 12:20:30 dnsmasq-dhcp[29938]: DHCPDISCOVER(eth0) > >> > > 06:44:da:01:13:98 > >> > > > > ignored > >> > > > > Nov 7 12:20:42 dnsmasq-dhcp[29938]: DHCPDISCOVER(eth0) > >> > > 06:44:da:01:13:98 > >> > > > > ignored > >> > > > > Nov 7 12:21:02 dnsmasq-dhcp[29938]: DHCPDISCOVER(eth0) > >> > > 06:44:da:01:13:98 > >> > > > > ignored > >> > > > > Nov 7 12:21:19 dnsmasq-dhcp[29938]: DHCPDISCOVER(eth0) > >> > > 06:44:da:01:13:98 > >> > > > > ignored > >> > > > > > >> > > > > Any reason why the dnsmasq service ignored the request from the > VM > >> > and > >> > > > how > >> > > > > can we fix that? > >> > > > > > >> > > > > At the moment, the only workaround we can do is to configure the > >> IP > >> > > > address > >> > > > > statically to the servelet, which is not practical. > >> > > > > > >> > > > > Any advice is greatly appreciated. > >> > > > > > >> > > > > Thank you. > >> > > > > > >> > > > > >> > > > >> > > >> > > > > >
