[PVE-User] ARP issue between lxc containers on PX 4.2
Guillaume
proxmox at shadowprojects.org
Sat Jul 9 15:05:58 CEST 2016
I am gonna be away for a few hours, thanks for the help Alwin.
Le 09/07/2016 à 14:59, Guillaume a écrit :
> Only restarted the netwrok services each times i tried something.
>
> Now i restarted the host and it is better.
>
> containers can ping themselves with their private interface (eth1) but
> still nothing on the public one (eth0). Firewall is down (pve-firewall
> stopped) but i have rules to allow ping between containers on public
> interface anyway.
>
> host can ping everyone on both interfaces.
>
> New routes in containers :
>
> ~# route
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref
> Use Iface
> default 51.254.231.94 0.0.0.0 UG 0 0 0 eth0
> 51.254.231.80 * 255.255.255.240 U 0 0 0 eth0
> 192.168.30.0 * 255.255.255.0 U 0 0 0 eth1
>
>
> Le 09/07/2016 à 14:22, Alwin Antreich a écrit :
>> Guillaume,
>>
>> On 07/09/2016 01:13 PM, Guillaume wrote:
>>> I tried enabling proxy_arp on the host, thinking it would help but
>>> it does not.
>>>
>>>
>>> Le 09/07/2016 à 13:03, Guillaume a écrit :
>>>> lxc container public interface (eth0) is bound to vmbr0 and private
>>>> interface (eth1) is bound to vmbr2.
>>>>
>>>> I removed the post-up/pre-down lines from the containers, it was a
>>>> left-over when i tried to fix the issue.
>>>> It doesn't change anything, public and private network works well,
>>>> except between the containers. So i can talk to
>>>> anything outside the host, but not inside.
>> Did you restart the proxmox host after network changes or just the
>> network services? If you didn't, please restart the
>> proxmox host, as the settings are not always picked up after network
>> service restart.
>>
>>>>
>>>>
>>>> Le 09/07/2016 à 12:33, Alwin Antreich a écrit :
>>>>> Guillaume,
>>>>>
>>>>> On 07/09/2016 12:10 PM, Guillaume wrote:
>>>>>> Of course, here they are :
>>>>>>
>>>>>> * Proxmox :
>>>>>>
>>>>>> ~# cat /etc/network/interfaces
>>>>>>
>>>>>> auto lo
>>>>>> iface lo inet loopback
>>>>>>
>>>>>> iface eth0 inet manual
>>>>>>
>>>>>> iface eth1 inet manual
>>>>>>
>>>>>> auto vmbr1
>>>>>> iface vmbr1 inet manual
>>>>>> bridge_ports dummy0
>>>>>> bridge_stp off
>>>>>> bridge_fd 0
>>>>>> post-up /etc/pve/kvm-networking.sh
>>>>>>
>>>>>> auto vmbr0
>>>>>> iface vmbr0 inet static
>>>>>> address 164.132.161.137
>>>>>> netmask 255.255.255.0
>>>>>> gateway 164.132.161.254
>>>>>> broadcast 164.132.161.255
>>>>>> bridge_ports eth0
>>>>>> bridge_stp off
>>>>>> bridge_fd 0
>>>>>> network 164.132.161.0
>>>>>> post-up /sbin/ip route add to 51.254.231.80/28 dev vmbr0
>>>>>> post-up /sbin/ip route add to default via 51.254.231.94
>>>>>> dev vmbr0 table 5
>>>>>> post-up /sbin/ip rule add from 51.254.231.80/28 table 5
>>>>>> pre-down /sbin/ip rule del from 51.254.231.80/28 table 5
>>>>>> pre-down /sbin/ip route del to default via
>>>>>> 51.254.231.94 dev vmbr0 table 5
>>>>>> pre-down /sbin/ip route del to 51.254.231.80/28 dev vmbr0
>>>>>>
>>>>>> iface vmbr0 inet6 static
>>>>>> address 2001:41d0:1008:1c89::1
>>>>>> netmask 64
>>>>>> gateway 2001:41d0:1008:1cff:ff:ff:ff:ff
>>>>>> post-up /sbin/ip -f inet6 route add
>>>>>> 2001:41d0:1008:1cff:ff:ff:ff:ff dev vmbr0
>>>>>> post-up /sbin/ip -f inet6 route add default via
>>>>>> 2001:41d0:1008:1cff:ff:ff:ff:ff
>>>>>> pre-down /sbin/ip -f inet6 route del default via
>>>>>> 2001:41d0:1008:1cff:ff:ff:ff:ff
>>>>>> pre-down /sbin/ip -f inet6 route del
>>>>>> 2001:41d0:1008:1cff:ff:ff:ff:ff dev vmbr0
>>>>>>
>>>>>> auto vmbr2
>>>>>> iface vmbr2 inet static
>>>>>> address 192.168.30.3
>>>>>> netmask 255.255.255.0
>>>>>> broadcast 192.168.30.255
>>>>>> bridge_ports eth1
>>>>>> bridge_stp off
>>>>>> bridge_fd 0
>>>>>> network 192.168.30.0
>>>>> What is your intention with the post-up? And the config resides
>>>>> under vmbr2 but you bind the route to vmbr0, is it
>>>>> supposed to be like this?
>>>>>
>>>>>> post-up /sbin/ip route add to 224.0.0.0/4 dev vmbr0
>>>>>> # pour forcer le multicast
>>>>>>
>>>>>> ~# route
>>>>>> Kernel IP routing table
>>>>>> Destination Gateway Genmask Flags Metric
>>>>>> Ref Use Iface
>>>>>> default 164.132.161.254 0.0.0.0 UG 0 0
>>>>>> 0 vmbr0
>>>>>> 51.254.231.80 * 255.255.255.240 U 0 0
>>>>>> 0 vmbr0
>>>>>> 164.132.161.0 * 255.255.255.0 U 0 0
>>>>>> 0 vmbr0
>>>>>> 192.168.30.0 * 255.255.255.0 U 0 0
>>>>>> 0 vmbr2
>>>>>> 224.0.0.0 * 240.0.0.0 U 0 0
>>>>>> 0 vmbr0
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> * LXC 1 :
>>>>>>
>>>>>> ~# cat /etc/network/interfaces
>>>>>> # interfaces(5) file used by ifup(8) and ifdown(8)
>>>>>> # Include files from /etc/network/interfaces.d:
>>>>>> source-directory /etc/network/interfaces.d
>>>>>>
>>>>>> auto eth0
>>>>>> iface eth0 inet static
>>>>>> address 51.254.231.80
>>>>>> netmask 255.255.255.240
>>>>>> gateway 51.254.231.94
>>>>>> network 51.254.231.80
>>>>>> post-up /sbin/ip route add 164.132.161.137 dev eth0
>>>>>> post-up /sbin/ip route add to default via 164.132.161.137
>>>>>> pre-down /sbin/ip route del to default via 164.132.161.137
>>>>>> pre-down /sbin/ip route del 164.132.161.137 dev eth0
>>>>>>
>>>>>> auto eth1
>>>>>> iface eth1 inet static
>>>>>> address 192.168.30.101
>>>>>> netmask 255.255.255.0
>>>>>>
>>>>>> ~# route
>>>>>> Kernel IP routing table
>>>>>> Destination Gateway Genmask Flags Metric
>>>>>> Ref Use Iface
>>>>>> default 51.254.231.94 0.0.0.0 UG 0 0
>>>>>> 0 eth0
>>>>>> 51.254.231.80 * 255.255.255.240 U 0 0
>>>>>> 0 eth0
>>>>>> 164.132.161.137 * 255.255.255.255 UH 0 0
>>>>>> 0 eth0
>>>>>> 192.168.30.0 * 255.255.255.0 U 0 0
>>>>>> 0 eth1
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> * LXC 2 :
>>>>>>
>>>>>> ~# cat /etc/network/interfaces
>>>>>> # interfaces(5) file used by ifup(8) and ifdown(8)
>>>>>> # Include files from /etc/network/interfaces.d:
>>>>>> source-directory /etc/network/interfaces.d
>>>>>>
>>>>>> auto eth0
>>>>>> iface eth0 inet static
>>>>>> address 51.254.231.81
>>>>>> netmask 255.255.255.240
>>>>>> gateway 51.254.231.94
>>>>>> network 51.254.231.80
>>>>>> post-up /sbin/ip route add 164.132.161.137 dev eth0
>>>>>> post-up /sbin/ip route add to default via 164.132.161.137
>>>>>> pre-down /sbin/ip route del to default via 164.132.161.137
>>>>>> pre-down /sbin/ip route del 164.132.161.137 dev eth0
>>>>>>
>>>>>> auto eth1
>>>>>> iface eth1 inet static
>>>>>> address 192.168.30.102
>>>>>> netmask 255.255.255.0
>>>>>>
>>>>>> ~# route
>>>>>> Kernel IP routing table
>>>>>> Destination Gateway Genmask Flags Metric
>>>>>> Ref Use Iface
>>>>>> default 51.254.231.94 0.0.0.0 UG 0 0
>>>>>> 0 eth0
>>>>>> 51.254.231.80 * 255.255.255.240 U 0 0
>>>>>> 0 eth0
>>>>>> 164.132.161.137 * 255.255.255.255 UH 0 0
>>>>>> 0 eth0
>>>>>> 192.168.30.0 * 255.255.255.0 U 0 0
>>>>>> 0 eth1
>>>>> And the LXC container are bound to vmbr2?
>>>>>
>>>>>> Le 09/07/2016 à 11:36, Alwin Antreich a écrit :
>>>>>>> Hi Guillaume,
>>>>>>>
>>>>>>> may you please add the network config of your host & lxc guests
>>>>>>> (incl. routes), for my part, I don't get the picture
>>>>>>> quite yet.
>>>>>>>
>>>>>>>
>>>>>>> On 07/08/2016 05:17 PM, Guillaume wrote:
>>>>>>>> I may have found lead, only on the host side.
>>>>>>>>
>>>>>>>>
>>>>>>>> From proxmox, i can't ping the lxc container private address
>>>>>>>>
>>>>>>>> root at srv3:~# ping 192.168.30.101
>>>>>>>> PING 192.168.30.101 (192.168.30.101) 56(84) bytes of data.
>>>>>>>> ^C
>>>>>>>> --- 192.168.30.101 ping statistics ---
>>>>>>>> 2 packets transmitted, 0 received, 100% packet loss, time 999ms
>>>>>>>>
>>>>>>>>
>>>>>>>> But i can ping another server private address (same vrack) :
>>>>>>>> root at srv3:~# ping 192.168.30.250
>>>>>>>> PING 192.168.30.250 (192.168.30.250) 56(84) bytes of data.
>>>>>>>> 64 bytes from 192.168.30.250: icmp_seq=1 ttl=64 time=0.630 ms
>>>>>>>> ^C
>>>>>>>> --- 192.168.30.250 ping statistics ---
>>>>>>>> 1 packets transmitted, 1 received, 0% packet loss, time 0ms
>>>>>>>> rtt min/avg/max/mdev = 0.630/0.630/0.630/0.000 ms
>>>>>>>>
>>>>>>>>
>>>>>>>> But, if i force the ping network interface on vmbr2 (host
>>>>>>>> private network interface) :
>>>>>>>>
>>>>>>>> root at srv3:~# ping -I vmbr2 192.168.30.101
>>>>>>>> PING 192.168.30.101 (192.168.30.101) from 192.168.30.3 vmbr2:
>>>>>>>> 56(84) bytes of data.
>>>>>>>> 64 bytes from 192.168.30.101: icmp_seq=1 ttl=64 time=0.084 ms
>>>>>>>> 64 bytes from 192.168.30.101: icmp_seq=2 ttl=64 time=0.024 ms
>>>>>>>> 64 bytes from 192.168.30.101: icmp_seq=3 ttl=64 time=0.035 ms
>>>>>>>> ^C
>>>>>>>> --- 192.168.30.101 ping statistics ---
>>>>>>>> 3 packets transmitted, 3 received, 0% packet loss, time 1998ms
>>>>>>>> rtt min/avg/max/mdev = 0.024/0.047/0.084/0.027 ms
>>>>>>>>
>>>>>>>>
>>>>>>>> It is strange since i have a route on vmbr2 for 192.168.30.0 :
>>>>>>>>
>>>>>>>> root at srv3:~# route
>>>>>>>> Kernel IP routing table
>>>>>>>> Destination Gateway Genmask Flags Metric Ref Use
>>>>>>>> Iface
>>>>>>>> default 164.132.168.254 0.0.0.0 UG 0 0 0 vmbr0
>>>>>>>> 51.254.233.80 * 255.255.255.240 U 0
>>>>>>>> 0 0 vmbr0
>>>>>>>> 164.132.168.0 * 255.255.255.0 U 0 0
>>>>>>>> 0 vmbr0
>>>>>>>> 192.168.30.0 * 255.255.255.0 U 0 0
>>>>>>>> 0 vmbr2
>>>>>>>> 224.0.0.0 * 240.0.0.0 U 0 0 0 vmbr0
>>>>>>>>
>>>>>>>> This solution doesn't change anything for the container. If i
>>>>>>>> try to ping a container (public or private
>>>>>>>> interface) from
>>>>>>>> another while forcing the interface, it doesn't help.
>>>>>>>>
>>>>>>>>
>>>>>>>> Le 08/07/2016 à 11:11, Guillaume a écrit :
>>>>>>>>> Hello,
>>>>>>>>>
>>>>>>>>> I'm running Proxmox 4.2-15, with a fresh install :
>>>>>>>>>
>>>>>>>>> # pveversion -v
>>>>>>>>> proxmox-ve: 4.2-56 (running kernel: 4.4.13-1-pve)
>>>>>>>>> pve-manager: 4.2-15 (running version: 4.2-15/6669ad2c)
>>>>>>>>> pve-kernel-4.4.13-1-pve: 4.4.13-56
>>>>>>>>> pve-kernel-4.2.8-1-pve: 4.2.8-41
>>>>>>>>> lvm2: 2.02.116-pve2
>>>>>>>>> corosync-pve: 2.3.5-2
>>>>>>>>> libqb0: 1.0-1
>>>>>>>>> pve-cluster: 4.0-42
>>>>>>>>> qemu-server: 4.0-83
>>>>>>>>> pve-firmware: 1.1-8
>>>>>>>>> libpve-common-perl: 4.0-70
>>>>>>>>> libpve-access-control: 4.0-16
>>>>>>>>> libpve-storage-perl: 4.0-55
>>>>>>>>> pve-libspice-server1: 0.12.5-2
>>>>>>>>> vncterm: 1.2-1
>>>>>>>>> pve-qemu-kvm: 2.5-19
>>>>>>>>> pve-container: 1.0-70
>>>>>>>>> pve-firewall: 2.0-29
>>>>>>>>> pve-ha-manager: 1.0-32
>>>>>>>>> ksm-control-daemon: 1.2-1
>>>>>>>>> glusterfs-client: 3.5.2-2+deb8u2
>>>>>>>>> lxc-pve: 1.1.5-7
>>>>>>>>> lxcfs: 2.0.0-pve2
>>>>>>>>> cgmanager: 0.39-pve1
>>>>>>>>> criu: 1.6.0-1
>>>>>>>>> zfsutils: 0.6.5.7-pve10~bpo80
>>>>>>>>>
>>>>>>>>> # sysctl -p
>>>>>>>>> net.ipv6.conf.all.autoconf = 0
>>>>>>>>> net.ipv6.conf.default.autoconf = 0
>>>>>>>>> net.ipv6.conf.vmbr0.autoconf = 0
>>>>>>>>> net.ipv6.conf.all.accept_ra = 0
>>>>>>>>> net.ipv6.conf.default.accept_ra = 0
>>>>>>>>> net.ipv6.conf.vmbr0.accept_ra = 0
>>>>>>>>> net.ipv6.conf.vmbr0.accept_ra = 0
>>>>>>>>> net.ipv6.conf.vmbr0.autoconf = 0
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I'm only using lxc containers.
>>>>>>>>>
>>>>>>>>> Host have 2 networks interfaces, vmbr0 with public ip
>>>>>>>>> 164.132.161.131/32 (gtw 164.132.161.254) and vmbr2 with
>>>>>>>>> private
>>>>>>>>> ip (ovh vrack 2) 192.168.30.3/24.
>>>>>>>>> Containers have public interface eth0 with public ip address
>>>>>>>>> (based on vmbr0) and eth1 with private ip address
>>>>>>>>> (based
>>>>>>>>> on vmbr2) :
>>>>>>>>>
>>>>>>>>> * LXC1
>>>>>>>>> eth0 : 51.254.231.80/28
>>>>>>>>> eth1 : 192.168.30.101/24
>>>>>>>>>
>>>>>>>>> * LXC2
>>>>>>>>> eth0 : 51.254.231.81/28
>>>>>>>>> eth1 : 192.168.30.102/24
>>>>>>>>>
>>>>>>>>> They both have access to the net, but can't talk to each
>>>>>>>>> other, whatever network interface (public or private) i'm
>>>>>>>>> using.
>>>>>>>>> Same issue with firewall down on the node (on the 3 levels).
>>>>>>>>>
>>>>>>>>> # Ping from LXC1 51.254.231.80 to LXC2 51.254.231.81 : tcpdump
>>>>>>>>> from LXC1
>>>>>>>>> 15:54:00.810638 ARP, Request who-has 164.132.161.250 tell
>>>>>>>>> 164.132.161.252, length 46
>>>>>>>>>
>>>>>>>>> # Ping from LXC1 192.168.30.101 to LXC2 192.168.30.102 (vrack)
>>>>>>>>> : tcpdump from LXC1
>>>>>>>>> 15:54:52.260934 ARP, Request who-has 192.168.30.102 tell
>>>>>>>>> 192.168.30.3, length 28
>>>>>>>>> 15:54:52.260988 ARP, Reply 192.168.30.102 is-at
>>>>>>>>> 62:31:32:34:65:61 (oui Unknown), length 28
>>>>>>>>> 15:54:52.575082 IP 192.168.30.102 > 192.168.30.101: ICMP echo
>>>>>>>>> request, id 1043, seq 3, length 64
>>>>>>>>> 15:54:53.583057 IP 192.168.30.102 > 192.168.30.101: ICMP echo
>>>>>>>>> request, id 1043, seq 4, length 64
>>>>>>>>>
>>>>>>>>> # Ping from LXC1 192.168.30.101 to LXC2 192.168.30.102 (vrack)
>>>>>>>>> : tcpdump from Proxmox
>>>>>>>>> 17:56:05.861665 ARP, Request who-has 192.168.30.101 tell
>>>>>>>>> 192.168.30.102, length 28
>>>>>>>>> 17:56:05.861688 ARP, Reply 192.168.30.101 is-at
>>>>>>>>> 62:31:32:34:65:61 (oui Unknown), length 28
>>>>>>>>> 17:56:06.860925 ARP, Request who-has 192.168.30.101 tell
>>>>>>>>> 192.168.30.102, length 28
>>>>>>>>> 17:56:06.860998 ARP, Reply 192.168.30.101 is-at
>>>>>>>>> 62:31:32:34:65:61 (oui Unknown), length 28
>>>>>>>>>
>>>>>>>>> Any idea ?
>>>>>>>>>
>>>>>>>>> Thanks,
>>>>>>>>>
>>>>>>>>> Guillaume
>>>>>>>>> _______________________________________________
>>>>>>>>> pve-user mailing list
>>>>>>>>> pve-user at pve.proxmox.com
>>>>>>>>> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
>>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> pve-user mailing list
>>>>>>>> pve-user at pve.proxmox.com
>>>>>>>> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
>>>>>>> Cheers,
>>>>>>> Alwin
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> pve-user mailing list
>>>>>>> pve-user at pve.proxmox.com
>>>>>>> http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
>>>>>>>
>>>>>> _______________________________________________
>>>>>> pve-user mailing list
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>>>>> Cheers,
>>>>> Alwin
>>>>> _______________________________________________
>>>>> pve-user mailing list
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>>>>>
>>>>
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>>>
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