[ovs-dev] [PATCH ovn] ovn-openstack.rst: Add check for Gateway_Chassis table

Flavio Fernandes flavio at flaviof.com
Thu Sep 5 14:27:04 UTC 2019

This is related to the section called "Adding a Gateway".

Added workaround command for a known issue in networking-ovn.
Even after the issue is resolved, it may be useful to have this
in the tutorial, so folks have a feel for how OVN keeps track
of chassis gateway.

Also, removed redundant route command when assigning an address
to the br-ex interface.

Signed-off-by: Flavio Fernandes <flavio at flaviof.com>
 Documentation/tutorials/ovn-openstack.rst | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/Documentation/tutorials/ovn-openstack.rst b/Documentation/tutorials/ovn-openstack.rst
index 353ef209e..ed30e3044 100644
--- a/Documentation/tutorials/ovn-openstack.rst
+++ b/Documentation/tutorials/ovn-openstack.rst
@@ -1331,6 +1331,20 @@ with an IP address from the "private" network, then we create a
 floating IP address on the "public" network, then we associate the
 port with the floating IP address.
+As of this writing, you may need to run the following to fix a
+problem with associating a logical port of router with the external
+  $ CHASSIS=$(ovn-nbctl --bare --columns="_uuid" find gateway_chassis) ; \
+    [ -z "${CHASSIS}" ] && PORT_NAME='' || \
+    PORT_NAME=$(ovn-nbctl --bare --columns=name \
+    find logical_router_port gateway_chassis="${CHASSIS}")
+  $ [ -z "${PORT_NAME}" ] && {
+      openstack router unset --external-gateway router1 && \
+      openstack router set --external-gateway public router1
+    } || echo logical port \"${PORT_NAME}\" in chassis \"${CHASSIS}\"
 Let's add a new VM ``d`` with a floating IP::
   $ openstack server create --nic net-id=private --flavor m1.nano --image $IMAGE_ID --key-name demo d
@@ -1347,7 +1361,6 @@ It's also necessary to configure the "public" network because DevStack
 does not do it automatically::
   $ sudo ip link set br-ex up
-  $ sudo ip route add dev br-ex
   $ sudo ip addr add dev br-ex
 Now you should be able to "ping" VM ``d`` from the OpenStack host::

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