Description of problem: OSP16.2 openstack router add subnet - fails with: 504 Gateway Time-out Version-Release number of selected component (if applicable): RHOS-16.2-RHEL-8-20210525.n.0 How reproducible: 100% Steps to Reproduce: 1. create a router 2. create a network 3. create a subnet 4. try to add subnet to router (add_router_interface) fails Actual results: + openstack router add subnet internal_net_ca19caa201_router internal_net_ca19caa201_subnet HttpException: 500: Server Error for url: http://10.0.0.102:9696/v2.0/routers/250dcf71-3110-4ef5-9349-b47a43de6e78/add_router_interface, Request Failed: internal server error while processing your request. + echo 'Set external-gateway for internal_net_ca19caa201_router' Set external-gateway for internal_net_ca19caa201_router + openstack router set --external-gateway nova internal_net_ca19caa201_router HttpException: 504: Server Error for url: http://10.0.0.102:9696/v2.0/routers/250dcf71-3110-4ef5-9349-b47a43de6e78, The server didn't respond in time.: 504 Gateway Time-out Additional info: auto reproducer is to run this vm boot script : https://code.engineering.redhat.com/gerrit/gitweb?p=openstack-pidone-qe.git;a=blob;f=CI/ansible_sts/templates/boot_oc_workload.sh.j2;h=5878eead7dcb89d143cfc832253a98af494e0457;hb=HEAD
Verified , the issues reported here are solved by the fix proposed. Tested via the a boot vm script. and cuncurent controller reboots https://code.engineering.redhat.com/gerrit/gitweb?p=openstack-pidone-qe.git;a=blob;f=CI/ansible_sts/templates/boot_oc_workload.sh.j2;h=5878eead7dcb89d143cfc832253a98af494e0457;hb=HEAD
*** Bug 1974439 has been marked as a duplicate of this bug. ***
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Red Hat OpenStack Platform (RHOSP) 16.2 enhancement advisory), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2021:3483