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Type: Epic
Resolution: Done
Priority: Critical
Fix Version/s: rhos-18.0.0
Affects Version/s: None
Component/s: os-net-config
Labels:

Epic Name:
[RFE] NetworkManager implementation for os-net-config
Story Points:
3
Blocked:
False
Ready:
False
Bugzilla Bug:
RHBZ: 1645689
Commitment:
Targeted
Dev Approval:
Committed
Docs Approval:
No Docs Impact
Epic Status:
In Progress
Feature Link:
OSPRH-814 - OSP18-NextGen Fast Datapath Dataplane configuration
PM Approval:
Committed
QE Approval:
No impact
Hierarchy Progress Bar:

14% To Do, 14% In Progress, 71% Done
Release Note Text:

Hide
.In RHOSO 18.0, a technology preview is available for the nmstate provider back-end in `os-net-config`.

This technology preview of nmstate and NIC hardware offload has known issues that make it unsuitable for production use. For production, use the `openstack-network-scripts` package rather than nmstate and NetworkManager.

There is a production-ready native nmstate mode you can select during installation, but network configuration, which must be provided in nmstate format, is not backwards-compatible with templates from TripleO. It also lacks certain features that os-net-config provides, such as NIC name mapping or DSCP configuration.

Show
.In RHOSO 18.0, a technology preview is available for the nmstate provider back-end in `os-net-config`. This technology preview of nmstate and NIC hardware offload has known issues that make it unsuitable for production use. For production, use the `openstack-network-scripts` package rather than nmstate and NetworkManager. There is a production-ready native nmstate mode you can select during installation, but network configuration, which must be provided in nmstate format, is not backwards-compatible with templates from TripleO. It also lacks certain features that os-net-config provides, such as NIC name mapping or DSCP configuration.
Release Note Type:
Technology Preview
Release Note Status:
Done
Test Coverage:

Rejected
Release Commit Exception:
Proposed
Errata Link:
https://errata.engineering.redhat.com/advisory/133297

Release Blocker:
Rejected

SFDC Cases Links:
SFDC Cases Counter:
SFDC Cases Open:

Description of problem:
The network init-scripts (including ifcfg files in /etc/sysconfig/network-scripts) are deprecated in favor of NetworkManager. In order to migrate away from init-scripts in os-net-config, we need to support a NetworkManager implementation in addition to the ifcfg implementation.

Version-Release number of selected component (if applicable):
OpenStack Stein

Actual results:
Currently all interface configuration is done in ifcfg files, and additionally there is a script to configure SR-IOV virtual functions at boot time. os-net-config also has support for ethtool commands and ovs-vsctl commands for OVS.

Expected results:
In order to switch to a NetworkManager implementation, we will use an interface to NetworkManager such as nmcli, nmstate, or Ansible Networking. Additionally, NetworkManager will have to have feature parity for interface types supported by os-net-config.

Additional info:
Most of the interface types are supported in NetworkManager, but we should confirm support in NetworkManager for the following device types:

OVS bonds
OVS patches (internal patches between bridges)
OVS tunnel ports
OVS User bridge (DPDK bridge)
OVS DPDK ports
OVS DPDK bonds
Infiniband network interfaces
VPP interfaces
VPP bonds
Contrail vRouter
Contrail vRouter DPDK
Big Switch IVS bridges
Big Switch NFVSwitch bridges (DPDK)
Big Switch NFVSwitch ports (DPDK)
Big Switch NFVSwitch internal patches (DPDK)

In addition, SR-IOV VF virtual functions are recently supported in NetworkManager, but we should confirm wheter the os-net-config SR-IOV configuration script that gets run by systemd is required when using NetworkManager to manage SR-IOV VFs.

impacts account

OSPRH-4276 End-to-end OSP host network provision with new nmstate backend