[openstack-dev] [Containers][docker] Networking problem

Jay Lau jay.lau.513 at gmail.com
Mon Dec 29 05:49:38 UTC 2014


There is no problem for your cluster, it is working well. With nova docker
driver, you need to use namespace to check the network as you did:


2014-12-29 13:15 GMT+08:00 Iván Chavero <ichavero at chavero.com.mx>:

> Hello,
>
> I've installed OpenStack with Docker as hypervisor on a cubietruck,
> everything
> seems to work ok but the container ip does not respond to pings nor
> respond to
> the service i'm running inside the container (nginx por 80).
>
> I checked how nova created the container and it looks like everything is
> in place:
>
> # nova list
> +--------------------------------------+---------------+----
> ----+------------+-------------+----------------------+
> | ID                                   | Name          | Status | Task
> State | Power State | Networks             |
> +--------------------------------------+---------------+----
> ----+------------+-------------+----------------------+
> | 249df778-b2b6-490c-9dce-1126f8f337f3 | test_nginx_13 | ACTIVE | -
>     | Running     | public=192.168.1.135 |
> +--------------------------------------+---------------+----
> ----+------------+-------------+----------------------+
>
>
> # docker ps
> CONTAINER ID        IMAGE COMMAND             CREATED             STATUS
> PORTS                  NAMES
> 89b59bf9f442        sotolitolabs/nginx_arm:latest "/usr/sbin/nginx"   6
> hours ago         Up 6 hours nova-249df778-b2b6-490c-9dce-1126f8f337f3
>
>
> A funny thing that i noticed but i'm not really sure it's relevant, the
> docker container
> does not show network info when created by nova:
>
> # docker inspect 89b59bf9f442
>
> .... unnecesary output....
>
> "NetworkSettings": {
>         "Bridge": "",
>         "Gateway": "",
>         "IPAddress": "",
>         "IPPrefixLen": 0,
>         "PortMapping": null,
>         "Ports": null
>     },
>
>
>
>
> # neutron router-list
> +--------------------------------------+---------+----------
> ------------------------------------------------------------
> ------------------------------------------------------------
> ---------------------------------------------------------+--
> -----------+-------+
> | id                                   | name    | external_gateway_info |
> distributed | ha    |
> +--------------------------------------+---------+----------
> ------------------------------------------------------------
> ------------------------------------------------------------
> ---------------------------------------------------------+--
> -----------+-------+
> | f8dc7e15-1087-4681-b495-217ecfa95189 | router1 | {"network_id":
> "160add9a-2d2e-45ab-8045-68b334d29418", "enable_snat": true,
> "external_fixed_ips": [{"subnet_id": "1ae33c0b-a04e-47b6-bdba-bbdf9a3ef14d",
> "ip_address": "192.168.1.120"}]} | False       | False |
> +--------------------------------------+---------+----------
> ------------------------------------------------------------
> ------------------------------------------------------------
> ---------------------------------------------------------+--
> -----------+-------+
>
>
> # neutron subnet-list
> +--------------------------------------+----------------+---
> -------------+----------------------------------------------------+
> | id                                   | name           | cidr           |
> allocation_pools |
> +--------------------------------------+----------------+---
> -------------+----------------------------------------------------+
> | 34995548-bc2b-4d33-bdb2-27443c01e483 | private_subnet | 10.0.0.0/24
> | {"start": "10.0.0.2", "end": "10.0.0.254"} |
> | 1ae33c0b-a04e-47b6-bdba-bbdf9a3ef14d | public_subnet  | 192.168.1.0/24
> | {"start": "192.168.1.120", "end": "192.168.1.200"} |
> +--------------------------------------+----------------+---
> -------------+----------------------------------------------------+
>
>
>
>
> # neutron port-list
> +--------------------------------------+------+-------------
> ------+-----------------------------------------------------
> ---------------------------------+
> | id                                   | name | mac_address       |
> fixed_ips |
> +--------------------------------------+------+-------------
> ------+-----------------------------------------------------
> ---------------------------------+
> | 863eb9a3-461c-4016-9bd1-7c4c7210db98 |      | fa:16:3e:24:7b:2c |
> {"subnet_id": "34995548-bc2b-4d33-bdb2-27443c01e483", "ip_address":
> "10.0.0.2"}      |
> | bbe59188-ab4e-4b92-a578-bbc2d6759295 |      | fa:16:3e:1c:04:6a |
> {"subnet_id": "1ae33c0b-a04e-47b6-bdba-bbdf9a3ef14d", "ip_address":
> "192.168.1.135"} |
> | c8b94a90-c7d1-44fc-a582-3370f5486d26 |      | fa:16:3e:6f:69:71 |
> {"subnet_id": "34995548-bc2b-4d33-bdb2-27443c01e483", "ip_address":
> "10.0.0.1"}      |
> | f108b583-0d54-4388-bcc0-f8d1cbe6efd4 |      | fa:16:3e:bb:3a:1b |
> {"subnet_id": "1ae33c0b-a04e-47b6-bdba-bbdf9a3ef14d", "ip_address":
> "192.168.1.120"} |
> +--------------------------------------+------+-------------
> ------+-----------------------------------------------------
> ---------------------------------+
>
>
>
> the network namespace is being created:
>
> # ip netns exec 89b59bf9f442a0d468d9d4d8c9370c
> 53f8e4a3ba4d8affcd6be8b2dde84fff64 ifconfig
> lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
>         inet 127.0.0.1  netmask 255.0.0.0
>         inet6 ::1  prefixlen 128  scopeid 0x10<host>
>         loop  txqueuelen 0  (Local Loopback)
>         RX packets 0  bytes 0 (0.0 B)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 0  bytes 0 (0.0 B)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> nsbbe59188-ab: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>         inet 192.168.1.135  netmask 255.255.255.0  broadcast 192.168.1.255
>         inet6 fe80::f816:3eff:fe1c:46a  prefixlen 64  scopeid 0x20<link>
>         ether fa:16:3e:1c:04:6a  txqueuelen 1000  (Ethernet)
>         RX packets 8  bytes 648 (648.0 B)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 8  bytes 648 (648.0 B)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
>
> when i try a ping it does not return:
>
> # ping -c3 192.168.1.135
> PING 192.168.1.135 (192.168.1.135) 56(84) bytes of data.
> From 192.168.1.65 icmp_seq=1 Destination Host Unreachable
> From 192.168.1.65 icmp_seq=2 Destination Host Unreachable
> From 192.168.1.65 icmp_seq=3 Destination Host Unreachable
>
> --- 192.168.1.135 ping statistics ---
> 3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2008ms
>
>
> i tried adding the interface to the bridge br-ex but it didn's work either:
>
> # ip netns exec 89b59bf9f442a0d468d9d4d8c9370c
> 53f8e4a3ba4d8affcd6be8b2dde84fff64 ovs-vsctl add-port br-ex nsbbe59188-ab
>
> relevant log extract:
>
> 2014-12-28T22:57:59.577Z|00700|bridge|WARN|could not open network device
> nsbbe59188-ab (No such
>
>
> even with error it appears
>
> # ovs-vsctl list-ports br-ex
> eth0
> nsbbe59188-ab
>
>
> i think this is a bridging problem but i'm not sure. can somebody give me
> a hint?
>
> Thanks
> Ivan
>
>
>
>
>
>
>
>
>
>
>
> --
> Iván Chavero
> Hacker
>
>
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>



-- 
Thanks,

Jay
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