[PVE-User] ARP issue between lxc containers on PX 4.2
Guillaume
proxmox at shadowprojects.org
Sat Jul 9 13:13:55 CEST 2016
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.
>
>
>
> 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
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>>>> Cheers,
>>>> Alwin
>>>>
>>>>
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>> Cheers,
>> Alwin
>> _______________________________________________
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>>
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