| Hello, I have a problem which is that some of my VMs are loosing there IP addresses from time to time. What I saw in the log is when this VM loose its IP address there are DHCPREQUEST send from the VM by dhclient and the server responded only 50 minutes later ! Any help, advise on how to debug would be welcome. Thanks in advance Patrick Here after is an extract from the log
My setup is as followed - Fedora 24 / Kernel 4.5.7 libvirt-daemon-driver-qemu-1.3.3.1-4.fc24.x86_64 libvirt-daemon-driver-nodedev-1.3.3.1-4.fc24.x86_64 libvirt-daemon-driver-secret-1.3.3.1-4.fc24.x86_64 libvirt-daemon-1.3.3.1-4.fc24.x86_64 libvirt-daemon-driver-storage-1.3.3.1-4.fc24.x86_64 libvirt-daemon-kvm-1.3.3.1-4.fc24.x86_64 libvirt-client-1.3.3.1-4.fc24.x86_64 libvirt-daemon-driver-interface-1.3.3.1-4.fc24.x86_64 libvirt-daemon-driver-nwfilter-1.3.3.1-4.fc24.x86_64 libvirt-daemon-config-network-1.3.3.1-4.fc24.x86_64 libvirt-daemon-driver-network-1.3.3.1-4.fc24.x86_64 libvirt-daemon-config-nwfilter-1.3.3.1-4.fc24.x86_64 - dnsmasq / 2.75-4 - Setup Network - hypervisor side. There is a bridge configuration, as I have one VM listening to the Internet as well. ifconfig br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 9000 net my ip address netmask 255.255.255.0 broadcast my ip address inet6 fe80::d6ae:52ff:fec7:6694 prefixlen 64 scopeid 0x20<link> ether d4:ae:52:c7:66:94 txqueuelen 1000 (Ethernet) RX packets 1395299 bytes 291328394 (277.8 MiB) RX errors 0 dropped 66 overruns 0 frame 0 TX packets 629001 bytes 777811458 (741.7 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 9000 inet6 fe80::d6ae:52ff:fec7:6694 prefixlen 64 scopeid 0x20<link> ether d4:ae:52:c7:66:94 txqueuelen 1000 (Ethernet) RX packets 7254272 bytes 2658859144 (2.4 GiB) RX errors 0 dropped 4923 overruns 0 frame 0 TX packets 7302074 bytes 6556766298 (6.1 GiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 sudo iptables-save [sudo] password for support: # Generated by iptables-save v1.4.21 on Fri Jul 1 10:50:45 2016 *mangle :PREROUTING ACCEPT [313661:46683942] :INPUT ACCEPT [312868:46455263] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [204754:109339610] :POSTROUTING ACCEPT [204754:109339610] -A POSTROUTING -o virbr1 -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill COMMIT # Completed on Fri Jul 1 10:50:45 2016 # Generated by iptables-save v1.4.21 on Fri Jul 1 10:50:45 2016 *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [204361:109206834] -A INPUT -i virbr1 -p udp -m udp --dport 53 -j ACCEPT -A INPUT -i virbr1 -p tcp -m tcp --dport 53 -j ACCEPT -A INPUT -i virbr1 -p udp -m udp --dport 67 -j ACCEPT -A INPUT -i virbr1 -p tcp -m tcp --dport 67 -j ACCEPT -A INPUT -i br0 -m set --match-set banned src -j DROP -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -p icmp -j ACCEPT -A INPUT -i lo -j ACCEPT -A INPUT -i br0 -p tcp -m state --state NEW -m tcp --dport 23 -j ACCEPT -A INPUT -j REJECT --reject-with icmp-host-prohibited -A FORWARD -i virbr1 -o virbr1 -j ACCEPT -A FORWARD -o virbr1 -j REJECT --reject-with icmp-port-unreachable -A FORWARD -i virbr1 -j REJECT --reject-with icmp-port-unreachable -A FORWARD -m physdev --physdev-is-bridged -j ACCEPT -A FORWARD -m set --match-set banned src -j DROP -A FORWARD -j REJECT --reject-with icmp-host-prohibited -A OUTPUT -o virbr1 -p udp -m udp --dport 68 -j ACCEPT COMMIT # Completed on Fri Jul 1 10:50:45 2016 <network> <name>prd-private-lan</name> <uuid>255083f4-05a1-4a24-bc66-d3a3a9ab0724</uuid> <bridge name='virbr1' stp='off' delay='0'/> <mac address='52:54:00:08:1e:d8'/> <domain name='prd.pipiche.net'/> <dns> <forwarder addr='8.8.4.4'/> <forwarder addr='8.8.8.8'/> </dns> <ip address='10.10.0.1' netmask='255.255.255.0'> <dhcp> <range start='10.10.0.128' end='10.10.0.254'/> <host mac='52:54:10:b6:35:ca' name='svc.prd.pipiche.net' ip='10.10.0.3'/> <host mac='52:54:10:32:88:ac' name='admin.prd.pipiche.net' ip='10.10.0.5'/> <host mac='52:54:10:5f:92:05' name='frontend.prd.pipiche.net' ip='10.10.0.7'/> <host mac='52:54:10:7d:3a:3f' name='mail.prd.pipiche.net' ip='10.10.0.10'/> <host mac='52:54:10:30:93:56' name='blog.prd.pipiche.net' ip='10.10.0.21'/> <host mac='52:54:10:78:c1:c2' name='cloud.prd.pipiche.net' ip='10.10.0.22'/> <host mac='52:54:10:64:00:21' name='web.prd.pipiche.net' ip='10.10.0.25'/> <host mac='52:54:10:5a:5f:63' name='dcroche.prd.pipiche.net' ip='10.10.0.26'/> <host mac='52:54:10:4c:b2:61' name='trac.prd.pipiche.net' ip='10.10.0.27'/> <host mac='52:54:10:62:de:5f' name='git.prd.pipiche.net' ip='10.10.0.62'/> </dhcp> </ip> </network> On the VM side, I’m using NetworkManager ifconfig eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.10.0.10 netmask 255.255.255.0 broadcast 10.10.0.255 inet6 fe80::5054:10ff:fe7d:3a3f prefixlen 64 scopeid 0x20<link> ether 52:54:10:7d:3a:3f txqueuelen 1000 (Ethernet) RX packets 1368559 bytes 304901897 (290.7 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1219893 bytes 2157040102 (2.0 GiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 sudo cat /etc/sysconfig/network-scripts/ifcfg-eth0 # Generated by dracut initrd HWADDR="52:54:10:7d:3a:3f" DEVICE="eth0" NAME="eth0" _ONBOOT_=yes NETBOOT=yes IPV6INIT=no BOOTPROTO=dhcp TYPE=Ethernet DNS1=10.10.0.1 DNS2=8.8.8.8 DNS3=8.8.4.4 |
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