Open Stack

Hi,

On Mon, Nov 23, 2020 at 12:11:55PM +0200, Pavlos Basaras wrote:
> Hello,
> 
> i am new to Openstack.
> 
> I have followed the instructions from
> https://docs.openstack.org/install-guide/ to install openstack Ussuri where
> i use a controller node and a compute node (i can ping each  other and
> access the internet from both nodes through the mgmt iface).
> 
> I use ubuntu 18.04 for all components.
> 
> I have configured the network option 2, seems to work fine:
> 
> openstack network agent list
> +--------------------------------------+--------------------+------------+-------------------+-------+-------+---------------------------+
> | ID                                   | Agent Type         | Host       |
> Availability Zone | Alive | State | Binary                    |
> +--------------------------------------+--------------------+------------+-------------------+-------+-------+---------------------------+
> | 2d8c3a89-32c4-4b97-aa4f-ca19db53b24f | L3 agent           | controller |
> nova              | :-)   | UP    | neutron-l3-agent          |
> | 413cd13d-88d7-45ce-8b2e-26fdb265740f | Metadata agent     | controller |
> None              | :-)   | UP    | neutron-metadata-agent    |
> | 42f57bee-63b3-44e6-9392-939ece98719d | Linux bridge agent | compute    |
> None              | :-)   | UP    | neutron-linuxbridge-agent |
> | 4a787a09-04aa-4350-bd32-0c0177ed06a1 | DHCP agent         | controller |
> nova              | :-)   | UP    | neutron-dhcp-agent        |
> | fdafc337-7581-4ecd-b175-810713a25e1f | Linux bridge agent | controller |
> None              | :-)   | UP    | neutron-linuxbridge-agent |
> +--------------------------------------+--------------------+------------+-------------------+-------+-------+---------------------------+
> 
> If i try to bring up instances connected by an internal network, they are
> successfully deployed.
> 
> When i use the provider network to bring up an instance with the command:
> openstack server create --flavor m1.tiny --image cirros034 --nic
> net-id=4463e4a7-3b06-46d9-b24f-3e2e7867ee96
> --security-group=5cf380e5-efb3-48b3-b8e9-095b1ebd817d provider-instance
> 
> the instance fails to be instantiated because the network cannot be
> deployed.
> 
> I noticed two points from the neutron-linuxbridge-agent.log file at the
> compute node (the logs at the controller seem fine):
> 
> 1) ERROR neutron.plugins.ml2.drivers.agent._common_agent
> pyroute2.netlink.exceptions.NetlinkError: (13, 'Permission denied')

This sounds like maybe some issue with usage of sudo by user which runs
neutron-linuxbridge-agent. Is it configured properly?

> 2) INFO neutron.plugins.ml2.drivers.agent._common_agent
> [req-816902d4-6581-49c1-939a-6ea69b437c99 - - - - -] Linux bridge agent
> Agent out of sync with plugin!  -- not sure if this one is a problem.

This is probably just a result of above error. But to be sure I would need to
see whole log.

If You will still have such issue, please open LP bug and attach Your logs
there. In such way it should be maybe easier to investigate what is going on
there.

In Ussuri we are running CI job neutron-tempest-plugin-scenario-linuxbridge
which deploys neutron-linuxbridge-agent and all works fine there. You can check
that e.g. on
https://zuul.opendev.org/t/openstack/build/441182cb87fd47daa34d5018fc2eb9ab

> 
> One part that i am not sure is the following configuration since i am on
> ubuntu 18 and not ubuntu 16:
> 
> # The provider network interface
> auto INTERFACE_NAME
> iface INTERFACE_NAME inet manual
> up ip link set dev $IFACE up
> down ip link set dev $IFACE down
> 
> I did not include this part in my file since its ubuntu 18, and netplan
> does not have an equivalent (i think) option. I have this netplan config
> 
>    enp0s8: --> mgmt
>       dhcp4: false
>       addresses: [10.0.0.31/24]
>       gateway4: 10.0.0.1
>       nameservers:
>           addresses: [8.8.8.8, 8.8.4.4]
>     enp0s9: --> provider
>       dhcp4: false
> 
> 
> 
> any advice?
> 
> all the best,
> Pavlos Basaras

-- 
Slawek Kaplonski
Principal Software Engineer
Red Hat