There were various problems when using openshift_use_flannel=true in the 3.2 installer. See https://github.com/openshift/openshift-ansible/issues/2326 and https://github.com/openshift/openshift-ansible/issues/2322
https://github.com/openshift/openshift-ansible/pull/2392
Verify this bug with openshift-ansible-3.2.28-1.git.0.5a85fc5.el7.noarch.rpm Flannel network could be installed successfully with setting the following options in ansible inventory: openshift_use_openshift_sdn=false openshift_use_flannel=true After installation, flanneld service is running, could connect to etcd cluster. No problems found in flannel configuration. Router and docker-registry service also could be deployed, move this bug to verified.
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, 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/RHSA-2016:1853