The issues with the creation of network namespaces may occur due to an
incorrect configuration of HAProxy and LBaaS or due to
contrail-svc-monitor not working properly.
Workaround:
Restart the contrail-svc-monitor service by restarting the
supervisor-config service group:
service supervisor-config restart
Verify the OpenContrail status:
contrail-status
Example of the system response extract:
 == Contrail Config ==
 supervisor-config:            active
 contrail-api:0                active
 contrail-config-nodemgr       active
 contrail-device-manager       active
 contrail-discovery:0          active
 contrail-schema               active
 contrail-svc-monitor          active
 ifmap                         active
Verify the HAProxy configuration created by LBaaS in
/var/lib/contrail/loadbalancer/haproxy/${LB_UUID}/.
Verify that HAProxy version >= 1.5 and iproute2 version >= 3.10.0 are installed on all compute nodes.