Red Hat Summit1.5. MicroShift networking components and services
Understand networking components and services and their operation in MicroShift.
The microshift-networking RPM is a package that automatically pulls in any networking-related dependencies and systemd services to initialize networking, for example, the microshift-ovs-init systemd service.
- NetworkManager
-
NetworkManager is required to set up the initial gateway bridge on the MicroShift node. The NetworkManager and
NetworkManager-ovsRPM packages are installed as dependencies to themicroshift-networkingRPM package, which contains the necessary configuration files. NetworkManager in MicroShift uses thekeyfileplugin and is restarted after installation of themicroshift-networkingRPM package. - microshift-ovs-init
-
The
microshift-ovs-init.serviceis installed by themicroshift-networkingRPM package as a dependent systemd service tomicroshift.service. It is responsible for setting up the OVS gateway bridge. - OVN containers
Two OVN-Kubernetes daemon sets are rendered and applied by MicroShift.
-
ovnkube-master Includes the
northd,nbdb,sbdbandovnkube-mastercontainers. ovnkube-node The ovnkube-node includes the OVN-Controller container.
After MicroShift starts, the OVN-Kubernetes daemon sets are deployed in the
openshift-ovn-kubernetesnamespace.
-
ovnkube-master Includes the
- Packaging
OVN-Kubernetes manifests and startup logic are built into MicroShift. The systemd services and configurations included in the
microshift-networkingRPM are:-
/etc/NetworkManager/conf.d/microshift-nm.confforNetworkManager.service -
/etc/systemd/system/ovs-vswitchd.service.d/microshift-cpuaffinity.confforovs-vswitchd.service -
/etc/systemd/system/ovsdb-server.service.d/microshift-cpuaffinity.confforovs-server.service -
/usr/bin/configure-ovs-microshift.shformicroshift-ovs-init.service -
/usr/bin/configure-ovs.shformicroshift-ovs-init.service -
/etc/crio/crio.conf.d/microshift-ovn.conffor the CRI-O service
-
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