[ovs-discuss] Problem while trying to add bridge in a container

Thu Feb 19 07:47:39 UTC 2015

Sorry, I missed this one email.

This turned out to be the reason. Everything went fine when I stopped
the OVS instance on my host.
Thanks for looking into this.

Thanks

On Tue, Feb 17, 2015 at 12:57 PM, Gurucharan Shetty <shettyg at nicira.com> wrote:
> Let me make one guess. Are you running OVS daemons both inside a
> container as wells as outside the container (and you are running the
> container where it shared the pid and network space with the host?) If
> you are doing it, you are stepping on each other's toes and it is
> expected that bridge created by one ovs-vswitchd will be deleted by
> bridge created by another ovs-vswitchd.
>
> If you just want to create a OVS bridge inside a container, don't run
> your container and ask it to share the host's network. Or the other
> option is don't start OVS in the host.
>
> On Tue, Feb 17, 2015 at 12:35 PM, Gurucharan Shetty <shettyg at nicira.com> wrote:
>> On Tue, Feb 17, 2015 at 11:58 AM, Abhishek Chanda
>> <abhishek.lists at gmail.com> wrote:
>>> Sorry for being vague.
>>>
>>> I am trying to run neutron in a container. A container runs neutron
>>> and OVS in host mode.
>> What do you mean when you say that a container runs OVS in host mode?
>> Sorry for being fussy, but the above can mean different things and I
>> don't want to guess. So instead of you trying to frame your problem,
>> let me show how I can create OVS bridge inside a container.
>>
>>
>> * Create a container
>> root at ubuntu14:~# docker run -d  --pid=host --net=host ubuntu /bin/sh
>> -c "while true; do echo hello world; sleep 1;
>> done"6d5508adca20a4c60d9fb35c18e88170852ffe6b63775c27013188034b7a7393
>>
>> * Enter the container
>> root at ubuntu14:~# docker-enter
>> 6d5508adca20a4c60d9fb35c18e88170852ffe6b63775c27013188034b7a7393
>>
>> * Install OVS inside the container
>> root at ubuntu14:~# apt-get update
>> Ign http://archive.ubuntu.com trusty InRelease
>> Ign http://archive.ubuntu.com trusty-updates InRelease
>> Ign http://archive.ubuntu.com trusty-security InRelease
>> Hit http://archive.ubuntu.com trusty Release.gpg
>> Get:1 http://archive.ubuntu.com trusty-updates Release.gpg [933 B]
>> Get:2 http://archive.ubuntu.com trusty-security Release.gpg [933 B]
>> Hit http://archive.ubuntu.com trusty Release
>> Get:3 http://archive.ubuntu.com trusty-updates Release [62.0 kB]
>> Get:4 http://archive.ubuntu.com trusty-security Release [62.0 kB]
>> Get:5 http://archive.ubuntu.com trusty/main Sources [1335 kB]
>> Get:6 http://archive.ubuntu.com trusty/restricted Sources [5335 B]
>> Get:7 http://archive.ubuntu.com trusty/universe Sources [7926 kB]
>> Get:8 http://archive.ubuntu.com trusty/main amd64 Packages [1743 kB]
>> Get:9 http://archive.ubuntu.com trusty/restricted amd64 Packages [16.0 kB]
>> Get:10 http://archive.ubuntu.com trusty/universe amd64 Packages [7589 kB]
>> Get:11 http://archive.ubuntu.com trusty-updates/main Sources [229 kB]
>> Get:12 http://archive.ubuntu.com trusty-updates/restricted Sources [1874 B]
>> Get:13 http://archive.ubuntu.com trusty-updates/universe Sources [130 kB]
>> Get:14 http://archive.ubuntu.com trusty-updates/main amd64 Packages [557 kB]
>> Get:15 http://archive.ubuntu.com trusty-updates/restricted amd64
>> Packages [14.8 kB]
>> Get:16 http://archive.ubuntu.com trusty-updates/universe amd64 Packages [329 kB]
>> Get:17 http://archive.ubuntu.com trusty-security/main Sources [86.9 kB]
>> Get:18 http://archive.ubuntu.com trusty-security/restricted Sources [1874 B]
>> Get:19 http://archive.ubuntu.com trusty-security/universe Sources [19.6 kB]
>> Get:20 http://archive.ubuntu.com trusty-security/main amd64 Packages [269 kB]
>> Get:21 http://archive.ubuntu.com trusty-security/restricted amd64
>> Packages [14.8 kB]
>> Get:22 http://archive.ubuntu.com trusty-security/universe amd64
>> Packages [113 kB]
>> Fetched 20.5 MB in 14s (1461 kB/s)
>> Reading package lists... Done
>>
>>
>> root at ubuntu14:~# apt-get install openvswitch-switch
>> Reading package lists... Done
>> Building dependency tree
>> Reading state information... Done
>> The following extra packages will be installed:
>>   libpython-stdlib libpython2.7-minimal libpython2.7-stdlib openssl
>>   openvswitch-common python python-minimal python2.7 python2.7-minimal
>>   uuid-runtime
>> Suggested packages:
>>   ca-certificates ethtool openvswitch-datapath-module python-doc python-tk
>>   python2.7-doc binutils binfmt-support
>> The following NEW packages will be installed:
>>   libpython-stdlib libpython2.7-minimal libpython2.7-stdlib openssl
>>   openvswitch-common openvswitch-switch python python-minimal python2.7
>>   python2.7-minimal uuid-runtime
>> 0 upgraded, 11 newly installed, 0 to remove and 10 not upgraded.
>> Need to get 5543 kB of archives.
>> After this operation, 23.3 MB of additional disk space will be used.
>> Do you want to continue? [Y/n] Y
>> Get:1 http://archive.ubuntu.com/ubuntu/ trusty/main
>> libpython2.7-minimal amd64 2.7.6-8 [307 kB]
>> Get:2 http://archive.ubuntu.com/ubuntu/ trusty/main python2.7-minimal
>> amd64 2.7.6-8 [1190 kB]
>> Get:3 http://archive.ubuntu.com/ubuntu/ trusty-updates/main openssl
>> amd64 1.0.1f-1ubuntu2.8 [489 kB]
>> Get:4 http://archive.ubuntu.com/ubuntu/ trusty-updates/main
>> uuid-runtime amd64 2.20.1-5.1ubuntu20.3 [12.2 kB]
>> Get:5 http://archive.ubuntu.com/ubuntu/ trusty/main
>> libpython2.7-stdlib amd64 2.7.6-8 [1872 kB]
>> Get:6 http://archive.ubuntu.com/ubuntu/ trusty/main libpython-stdlib
>> amd64 2.7.5-5ubuntu3 [7012 B]
>> Get:7 http://archive.ubuntu.com/ubuntu/ trusty/main python2.7 amd64
>> 2.7.6-8 [197 kB]
>> Get:8 http://archive.ubuntu.com/ubuntu/ trusty/main python-minimal
>> amd64 2.7.5-5ubuntu3 [27.5 kB]
>> Get:9 http://archive.ubuntu.com/ubuntu/ trusty/main python amd64
>> 2.7.5-5ubuntu3 [134 kB]
>> Get:10 http://archive.ubuntu.com/ubuntu/ trusty-updates/main
>> openvswitch-common amd64 2.0.2-0ubuntu0.14.04.1 [444 kB]
>> Get:11 http://archive.ubuntu.com/ubuntu/ trusty-updates/main
>> openvswitch-switch amd64 2.0.2-0ubuntu0.14.04.1 [863 kB]
>> Fetched 5543 kB in 5s (1083 kB/s)
>> Selecting previously unselected package libpython2.7-minimal:amd64.
>> (Reading database ... 11527 files and directories currently installed.)
>> Preparing to unpack .../libpython2.7-minimal_2.7.6-8_amd64.deb ...
>> Unpacking libpython2.7-minimal:amd64 (2.7.6-8) ...
>> Selecting previously unselected package python2.7-minimal.
>> Preparing to unpack .../python2.7-minimal_2.7.6-8_amd64.deb ...
>> Unpacking python2.7-minimal (2.7.6-8) ...
>> Selecting previously unselected package openssl.
>> Preparing to unpack .../openssl_1.0.1f-1ubuntu2.8_amd64.deb ...
>> Unpacking openssl (1.0.1f-1ubuntu2.8) ...
>> Selecting previously unselected package uuid-runtime.
>> Preparing to unpack .../uuid-runtime_2.20.1-5.1ubuntu20.3_amd64.deb ...
>> Unpacking uuid-runtime (2.20.1-5.1ubuntu20.3) ...
>> Selecting previously unselected package libpython2.7-stdlib:amd64.
>> Preparing to unpack .../libpython2.7-stdlib_2.7.6-8_amd64.deb ...
>> Unpacking libpython2.7-stdlib:amd64 (2.7.6-8) ...
>> Selecting previously unselected package libpython-stdlib:amd64.
>> Preparing to unpack .../libpython-stdlib_2.7.5-5ubuntu3_amd64.deb ...
>> Unpacking libpython-stdlib:amd64 (2.7.5-5ubuntu3) ...
>> Selecting previously unselected package python2.7.
>> Preparing to unpack .../python2.7_2.7.6-8_amd64.deb ...
>> Unpacking python2.7 (2.7.6-8) ...
>> Selecting previously unselected package python-minimal.
>> Preparing to unpack .../python-minimal_2.7.5-5ubuntu3_amd64.deb ...
>> Unpacking python-minimal (2.7.5-5ubuntu3) ...
>> Selecting previously unselected package python.
>> Preparing to unpack .../python_2.7.5-5ubuntu3_amd64.deb ...
>> Unpacking python (2.7.5-5ubuntu3) ...
>> Selecting previously unselected package openvswitch-common.
>> Preparing to unpack .../openvswitch-common_2.0.2-0ubuntu0.14.04.1_amd64.deb ...
>> Unpacking openvswitch-common (2.0.2-0ubuntu0.14.04.1) ...
>> Selecting previously unselected package openvswitch-switch.
>> Preparing to unpack .../openvswitch-switch_2.0.2-0ubuntu0.14.04.1_amd64.deb ...
>> Unpacking openvswitch-switch (2.0.2-0ubuntu0.14.04.1) ...
>> Processing triggers for mime-support (3.54ubuntu1.1) ...
>> Processing triggers for ureadahead (0.100.0-16) ...
>> Setting up libpython2.7-minimal:amd64 (2.7.6-8) ...
>> Setting up python2.7-minimal (2.7.6-8) ...
>> Linking and byte-compiling packages for runtime python2.7...
>> Setting up openssl (1.0.1f-1ubuntu2.8) ...
>> Setting up uuid-runtime (2.20.1-5.1ubuntu20.3) ...
>> Setting up libpython2.7-stdlib:amd64 (2.7.6-8) ...
>> Setting up libpython-stdlib:amd64 (2.7.5-5ubuntu3) ...
>> Setting up python2.7 (2.7.6-8) ...
>> Setting up python-minimal (2.7.5-5ubuntu3) ...
>> Setting up python (2.7.5-5ubuntu3) ...
>> Setting up openvswitch-common (2.0.2-0ubuntu0.14.04.1) ...
>> Setting up openvswitch-switch (2.0.2-0ubuntu0.14.04.1) ...
>> invoke-rc.d: policy-rc.d denied execution of start.
>> Processing triggers for ureadahead (0.100.0-16) ...
>>
>> * Start OVS inside the container
>>
>> root at ubuntu14:~# /etc/init.d/openvswitch-switch start
>>  * /etc/openvswitch/conf.db does not exist
>>  * Creating empty database /etc/openvswitch/conf.db
>>  * Starting ovsdb-server
>>  * Configuring Open vSwitch system IDs
>>  * Starting ovs-vswitchd
>>  * Enabling remote OVSDB managers
>> root at ubuntu14:~# ovs-vsctl show
>> 76eb6660-c7ac-4dc1-8ee7-ebbfeee46175
>>     ovs_version: "2.0.2"
>> root at ubuntu14:~# ovs-vsctl add-br br0
>> root at ubuntu14:~# ovs-vsctl show
>> 76eb6660-c7ac-4dc1-8ee7-ebbfeee46175
>>     Bridge "br0"
>>         Port "br0"
>>             Interface "br0"
>>                 type: internal
>>     ovs_version: "2.0.2"
>> root at ubuntu14:~#
>> root at ubuntu14:~# ip link show br0
>> 807: br0: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
>> mode DEFAULT group default
>>     link/ether 0a:e2:0e:ca:f3:47 brd ff:ff:ff:ff:ff:ff
>> root at ubuntu14:~#
>> root at ubuntu14:~#
>>
>> * Exit the container and see whether "br0" is visible inside the host
>>
>> root at ubuntu14:~# exit
>> logout
>> root at ubuntu14:~# ip link show br0
>> 807: br0: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN
>> mode DEFAULT group default
>>     link/ether 0a:e2:0e:ca:f3:47 brd ff:ff:ff:ff:ff:ff
>> root at ubuntu14:~#