[Lxc-users] container hostname not visible to host, ubuntu 12.04
Ben Butler-Cole
ben at bridesmere.com
Fri Jul 6 07:56:49 UTC 2012
Hello Zeyang
I suggest doing a reverse DNS lookup from the host to check that the DNS
name of the container is what you think it is
dig +short -x 10.0.3.195
I have seen a situation (running LXC inside EC2 instances) where an
unexpected DNS name was being assigned to the guest by the wider system DNS.
I also see that you seem to be running the LXC network inside the guest as
well as on the host (it too has an lxcbr0 bridge network). Is this
intentional?
-Ben
On 6 July 2012 08:09, Li, Zeyang <a.banknote at gmail.com> wrote:
> Hi,
>
> I ran into a problem where I cannot ssh to containers but I could do
> the reverse and ssh to the host from inside containers.
> I'm doing this on ubuntu 12.04 and followed official tutorial. It
> looks like it should be rather painless and I should be able to access
> container through hostname or ip after booting it.
>
> Here is my container network setup, hostname "budda1"
>
> ubuntu at budda1:~$ ifconfig
> eth0 Link encap:Ethernet HWaddr 00:16:3e:8b:af:ba
> inet addr:10.0.3.195 Bcast:10.0.3.255 Mask:255.255.255.0
> inet6 addr: fe80::216:3eff:fe8b:afba/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:44 errors:0 dropped:0 overruns:0 frame:0
> TX packets:22 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:6963 (6.9 KB) TX bytes:3248 (3.2 KB)
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
>
> lxcbr0 Link encap:Ethernet HWaddr 1a:cf:ac:d0:2e:b0
> inet addr:10.0.3.1 Bcast:10.0.3.255 Mask:255.255.255.0
> inet6 addr: fe80::18cf:acff:fed0:2eb0/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:0 (0.0 B) TX bytes:554 (554.0 B)
>
>
> Here is my host network setup.
>
> eth1 Link encap:Ethernet HWaddr 00:0b:e0:f0:00:ed
> inet addr:192.168.0.187 Bcast:192.168.0.255 Mask:255.255.255.0
> inet6 addr: fe80::20b:e0ff:fef0:ed/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:3774669 errors:0 dropped:0 overruns:0 frame:0
> TX packets:19871338 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:325045419 (325.0 MB) TX bytes:28140974879 (28.1 GB)
> Interrupt:42 Base address:0xc000
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:9002 errors:0 dropped:0 overruns:0 frame:0
> TX packets:9002 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:895944 (895.9 KB) TX bytes:895944 (895.9 KB)
>
> lxcbr0 Link encap:Ethernet HWaddr 42:41:2f:06:48:54
> inet addr:10.0.3.1 Bcast:10.0.3.255 Mask:255.255.255.0
> inet6 addr: fe80::4041:2fff:fe06:4854/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:967 errors:0 dropped:0 overruns:0 frame:0
> TX packets:4742 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:265702 (265.7 KB) TX bytes:362339 (362.3 KB)
>
> vethDRRJNv Link encap:Ethernet HWaddr ea:a8:65:4e:bc:af
> inet6 addr: fe80::e8a8:65ff:fe4e:bcaf/64 Scope:Link
> UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
> RX packets:25 errors:0 dropped:0 overruns:0 frame:0
> TX packets:72 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:3506 (3.5 KB) TX bytes:8848 (8.8 KB)
>
> vethNoOhWO Link encap:Ethernet HWaddr 42:41:2f:06:48:54
> inet6 addr: fe80::4041:2fff:fe06:4854/64 Scope:Link
> UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
> RX packets:169 errors:0 dropped:0 overruns:0 frame:0
> TX packets:817 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:29672 (29.6 KB) TX bytes:91511 (91.5 KB)
>
> vethmo7HuT Link encap:Ethernet HWaddr ca:34:1b:41:93:74
> inet6 addr: fe80::c834:1bff:fe41:9374/64 Scope:Link
> UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
> RX packets:228 errors:0 dropped:0 overruns:0 frame:0
> TX packets:1114 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:45992 (45.9 KB) TX bytes:110286 (110.2 KB)
>
> virbr0 Link encap:Ethernet HWaddr 8e:24:41:13:de:9a
> inet addr:192.168.122.1 Bcast:192.168.122.255
> Mask:255.255.255.0
> UP BROADCAST MULTICAST MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
>
> Thanks,
> Zeyang
>
>
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