The flowwing information should be added to AdminGuide "Adding an OpenStack Networking (Neutron) Instance for Network Provisioning" RHEL8 hosts does not work with Red Hat OpenStack Platform versions 10, 13, and 14. For this reason, OpenStack Networking (Neutron) requires RHEL7 hosts.
My understanding is that RHV 4.4 does not provide any support for iptables, regardless of the host. If you have an environment with RHVM 4.4 and a cluster with one or more EL 7 hosts, then the highest cluster compatibility level you can set for that cluster is 4.3, and any EL 7 hosts in that cluster can only have RHV 4.3 installed. Is this the case you are talking about? In such a case, then is iptables supported in the host, but not in RHVM?
I'm addressing this in conjunction with bug 1748388.
(In reply to Steve Goodman from comment #1) > My understanding is that RHV 4.4 does not provide any support for iptables, > regardless of the host. > > If you have an environment with RHVM 4.4 and a cluster with one or more EL 7 > hosts, then the highest cluster compatibility level you can set for that > cluster is 4.3, and any EL 7 hosts in that cluster can only have RHV 4.3 > installed. > > Is this the case you are talking about? In such a case, then is iptables > supported in the host, but not in RHVM? Yes. If neutron-agent (of the supported OpenStack versions) is deployed by Director/TripleO , there might be some iptable rules, which are created and managed by OpenStack, not RHV/oVirt.
Dominik, Please check the message I added in the preview [1] and leave comments in the merge request[2]. [1] https://cee-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/CCS/job/ccs-mr-preview/8100/artifact/doc-Administration_Guide/preview/index.html#Adding_an_OpenStack_Network_Service_Neutron_for_Network_Provisioning [2] https://gitlab.cee.redhat.com/rhci-documentation/docs-Red_Hat_Enterprise_Virtualization/merge_requests/1631/diffs
See Admin Guide: https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.4-beta/html-single/administration_guide/index?lb_target=production#Adding_an_OpenStack_Network_Service_Neutron_for_Network_Provisioning