About the OVN-Kubernetes network provider - OVN-Kubernetes default CNI network provider | Networking | OpenShift Container Platform 4.4

About
- Welcome
- About OpenShift Kubernetes Engine
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Release notes
- OpenShift Container Platform 4.4 release notes
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Architecture
- Product architecture
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- The control plane
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Installing
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  - Installing a cluster on IBM Z and LinuxONE
  - Restricted network IBM Z installation
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  - Installing a cluster on IBM Power
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Authentication and authorization
- Understanding authentication
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- Impersonating the system:admin user
- Syncing LDAP groups
Networking
- Understanding networking
- Accessing hosts
- Understanding the Cluster Network Operator
- Understanding the DNS Operator
- Understanding the Ingress Operator
- Using SCTP
- Network policy
- Multiple networks
- Hardware networks
- OpenShift SDN default CNI network provider
- OVN-Kubernetes default CNI network provider
- Configuring Routes
  - Route configuration
  - Secured routes
- Configuring ingress cluster traffic
- Configuring the cluster-wide proxy
- Configuring a custom PKI
Storage
- Understanding ephemeral storage
- Understanding persistent storage
- Configuring persistent storage
- Using Container Storage Interface (CSI)
- Expanding persistent volumes
- Dynamic provisioning
Registry
- Overview
- Image Registry Operator in OpenShift Container Platform
- Setting up and configuring the registry
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- Accessing the registry
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Operators
- Understanding Operators
- Understanding the Operator Lifecycle Manager (OLM)
- Understanding the OperatorHub
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- Configuring proxy support
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- Using OLM on restricted networks
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Pipelines
- Understanding OpenShift Pipelines
- Installing OpenShift Pipelines
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- Creating applications with OpenShift Pipelines
- Working with Pipelines using the Developer perspective
- OpenShift Pipelines release notes
Images
- Configuring the Samples Operator
- Using the Samples Operator with an alternate registry
- Understanding containers, images, and imagestreams
- Creating images
- Managing images
- Managing image streams
- Using image streams with Kubernetes resources
- Triggering updates on image stream changes
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- Using images
Applications
- Projects
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- Quotas
  - Resource quotas per project
  - Resource quotas across multiple projects
- Monitoring project and application metrics using the Developer perspective
- Monitoring application health
- Idling applications
- Pruning objects to reclaim resources
- Using the Red Hat Marketplace
Machine management
- Creating machine sets
- Manually scaling a machine set
- Modifying a machine set
- Deleting a machine
- Applying autoscaling to a cluster
- Creating infrastructure machine sets
- User-provisioned infrastructure
- Deploying machine health checks
Nodes
- Working with pods
- Controlling pod placement onto nodes (scheduling)
- Using Jobs and DaemonSets
  - Running background tasks on nodes automatically with daemonsets
  - Running tasks in pods using jobs
- Working with nodes
- Working with containers
- Working with clusters
Logging
- About cluster logging
- About deploying cluster logging
- Deploying cluster logging
- Updating cluster logging
- Viewing cluster logs
- Viewing cluster logs using Kibana
- Configuring your cluster logging deployment
- Viewing Elasticsearch status
- Viewing cluster logging status
- Moving the cluster logging resources with node selectors
- Manually rolling out Elasticsearch
- Collecting logging data for Red Hat Support
- Troubleshooting Kibana
- Exported fields
- Uninstalling cluster logging
Monitoring
- Cluster monitoring
- Monitoring your own services
- Exposing custom application metrics for autoscaling
Metering
- About metering
- Installing metering
- Upgrading metering
- Configuring metering
- Reports
  - About reports
  - Storage Locations
- Using metering
- Examples of using metering
- Troubleshooting and debugging
- Uninstalling metering
Scalability and performance
- Recommended installation practices
- Recommended host practices
- Recommended cluster scaling practices
- Using the Node Tuning Operator
- Using Cluster Loader
- Using CPU Manager
- Using Topology Manager
- Scaling the Cluster Monitoring Operator
- Planning your environment according to object maximums
- Optimizing storage
- Optimizing routing
- Optimizing networking
- What huge pages do and how they are consumed by apps
Backup and restore
- Backing up etcd data
- Replacing an unhealthy etcd member
- Disaster recovery
Migration
- Migrating from OpenShift Container Platform 3
- Migrating from OpenShift Container Platform 4.1
- Migrating from OpenShift Container Platform 4.2 and later
CLI tools
- OpenShift CLI (oc)
- Developer CLI (odo)
- Helm CLI
  - Getting started with Helm on OpenShift Container Platform
- Knative CLI (kn) for use with OpenShift Serverless
- Pipelines CLI (tkn)
API reference
- API list
- Common object reference
  - Index
- Authorization APIs
  - About Authorization APIs
  - LocalResourceAccessReview [authorization.openshift.io/v1]
  - LocalSubjectAccessReview [authorization.openshift.io/v1]
  - ResourceAccessReview [authorization.openshift.io/v1]
  - SelfSubjectRulesReview [authorization.openshift.io/v1]
  - SubjectAccessReview [authorization.openshift.io/v1]
  - SubjectRulesReview [authorization.openshift.io/v1]
  - TokenReview [authentication.k8s.io/v1]
  - LocalSubjectAccessReview [authorization.k8s.io/v1]
  - SelfSubjectAccessReview [authorization.k8s.io/v1]
  - SelfSubjectRulesReview [authorization.k8s.io/v1]
  - SubjectAccessReview [authorization.k8s.io/v1]
- Autoscale APIs
  - About Autoscale APIs
  - ClusterAutoscaler [autoscaling.openshift.io/v1]
  - MachineAutoscaler [autoscaling.openshift.io/v1beta1]
  - HorizontalPodAutoscaler [autoscaling/v1]
- Config APIs
  - About Config APIs
  - APIServer [config.openshift.io/v1]
  - Authentication [config.openshift.io/v1]
  - Build [config.openshift.io/v1]
  - ClusterOperator [config.openshift.io/v1]
  - ClusterVersion [config.openshift.io/v1]
  - Console [config.openshift.io/v1]
  - DNS [config.openshift.io/v1]
  - FeatureGate [config.openshift.io/v1]
  - Image [config.openshift.io/v1]
  - Infrastructure [config.openshift.io/v1]
  - Ingress [config.openshift.io/v1]
  - Network [config.openshift.io/v1]
  - OAuth [config.openshift.io/v1]
  - OperatorHub [config.openshift.io/v1]
  - Project [config.openshift.io/v1]
  - Proxy [config.openshift.io/v1]
  - Scheduler [config.openshift.io/v1]
- Console APIs
  - About Console APIs
  - ConsoleCLIDownload [console.openshift.io/v1]
  - ConsoleExternalLogLink [console.openshift.io/v1]
  - ConsoleLink [console.openshift.io/v1]
  - ConsoleNotification [console.openshift.io/v1]
  - ConsoleYAMLSample [console.openshift.io/v1]
- Extension APIs
  - About Extension APIs
  - APIService [apiregistration.k8s.io/v1]
  - CustomResourceDefinition [apiextensions.k8s.io/v1]
  - MutatingWebhookConfiguration [admissionregistration.k8s.io/v1]
  - ValidatingWebhookConfiguration [admissionregistration.k8s.io/v1]
- Image APIs
  - About Image APIs
  - Image [image.openshift.io/v1]
  - ImageSignature [image.openshift.io/v1]
  - ImageStreamImage [image.openshift.io/v1]
  - ImageStreamImport [image.openshift.io/v1]
  - ImageStreamMapping [image.openshift.io/v1]
  - ImageStream [image.openshift.io/v1]
  - ImageStreamTag [image.openshift.io/v1]
  - ImageTag [image.openshift.io/v1]
- Machine APIs
  - About Machine APIs
  - ContainerRuntimeConfig [machineconfiguration.openshift.io/v1]
  - ControllerConfig [machineconfiguration.openshift.io/v1]
  - KubeletConfig [machineconfiguration.openshift.io/v1]
  - MachineConfigPool [machineconfiguration.openshift.io/v1]
  - MachineConfig [machineconfiguration.openshift.io/v1]
  - MachineHealthCheck [machine.openshift.io/v1beta1]
  - Machine [machine.openshift.io/v1beta1]
  - MachineSet [machine.openshift.io/v1beta1]
- Metadata APIs
  - About Metadata APIs
  - Binding [core/v1]
  - ComponentStatus [core/v1]
  - ConfigMap [core/v1]
  - ControllerRevision [apps/v1]
  - Event [events.k8s.io/v1beta1]
  - Event [core/v1]
  - Lease [coordination.k8s.io/v1]
  - Namespace [core/v1]
- Monitoring APIs
  - About Monitoring APIs
  - Alertmanager [monitoring.coreos.com/v1]
  - PodMonitor [monitoring.coreos.com/v1]
  - Prometheus [monitoring.coreos.com/v1]
  - PrometheusRule [monitoring.coreos.com/v1]
  - ServiceMonitor [monitoring.coreos.com/v1]
- Network APIs
  - About Network APIs
  - ClusterNetwork [network.openshift.io/v1]
  - Endpoints [core/v1]
  - EndpointSlice [discovery.k8s.io/v1beta1]
  - EgressNetworkPolicy [network.openshift.io/v1]
  - HostSubnet [network.openshift.io/v1]
  - Ingress [networking.k8s.io/v1beta1]
  - NetNamespace [network.openshift.io/v1]
  - NetworkAttachmentDefinition [k8s.cni.cncf.io/v1]
  - NetworkPolicy [networking.k8s.io/v1]
  - Route [route.openshift.io/v1]
  - Service [core/v1]
- Node APIs
  - About Node APIs
  - Node [core/v1]
  - Profile [tuned.openshift.io/v1]
  - RuntimeClass [node.k8s.io/v1beta1]
  - Tuned [tuned.openshift.io/v1]
- OAuth APIs
  - About OAuth APIs
  - OAuthAccessToken [oauth.openshift.io/v1]
  - OAuthAuthorizeToken [oauth.openshift.io/v1]
  - OAuthClientAuthorization [oauth.openshift.io/v1]
  - OAuthClient [oauth.openshift.io/v1]
- Operator APIs
  - About Operator APIs
  - Authentication [operator.openshift.io/v1]
  - Console [operator.openshift.io/v1]
  - Config [imageregistry.operator.openshift.io/v1]
  - Config [samples.operator.openshift.io/v1]
  - CSISnapshotController [operator.openshift.io/v1]
  - DNS [operator.openshift.io/v1]
  - DNSRecord [ingress.operator.openshift.io/v1]
  - Etcd [operator.openshift.io/v1]
  - ImageContentSourcePolicy [operator.openshift.io/v1alpha1]
  - ImagePruner [imageregistry.operator.openshift.io/v1]
  - IngressController [operator.openshift.io/v1]
  - KubeAPIServer [operator.openshift.io/v1]
  - KubeControllerManager [operator.openshift.io/v1]
  - KubeScheduler [operator.openshift.io/v1]
  - KubeStorageVersionMigrator [operator.openshift.io/v1]
  - Network [operator.openshift.io/v1]
  - OpenShiftAPIServer [operator.openshift.io/v1]
  - OpenShiftControllerManager [operator.openshift.io/v1]
  - ServiceCA [operator.openshift.io/v1]
  - ServiceCatalogAPIServer [operator.openshift.io/v1]
  - ServiceCatalogControllerManager [operator.openshift.io/v1]
- OperatorHub APIs
  - About OperatorHub APIs
  - CatalogSourceConfig [operators.coreos.com/v1]
  - CatalogSource [operators.coreos.com/v1alpha1]
  - ClusterServiceVersion [operators.coreos.com/v1alpha1]
  - InstallPlan [operators.coreos.com/v1alpha1]
  - OperatorGroup [operators.coreos.com/v1]
  - OperatorSource [operators.coreos.com/v1]
  - PackageManifest [packages.operators.coreos.com/v1]
  - Subscription [operators.coreos.com/v1alpha1]
- Policy APIs
  - About Policy APIs
  - PodDisruptionBudget [policy/v1beta1]
- Project APIs
  - About Project APIs
  - Project [project.openshift.io/v1]
  - ProjectRequest [project.openshift.io/v1]
- RBAC APIs
  - About RBAC APIs
  - ClusterRoleBinding [rbac.authorization.k8s.io/v1]
  - ClusterRole [rbac.authorization.k8s.io/v1]
  - RoleBinding [rbac.authorization.k8s.io/v1]
  - Role [rbac.authorization.k8s.io/v1]
- Role APIs
  - About Role APIs
  - ClusterRoleBinding [authorization.openshift.io/v1]
  - ClusterRole [authorization.openshift.io/v1]
  - RoleBindingRestriction [authorization.openshift.io/v1]
  - RoleBinding [authorization.openshift.io/v1]
  - Role [authorization.openshift.io/v1]
- Schedule and quota APIs
  - About Schedule and quota APIs
  - AppliedClusterResourceQuota [quota.openshift.io/v1]
  - ClusterResourceQuota [quota.openshift.io/v1]
  - LimitRange [core/v1]
  - PriorityClass [scheduling.k8s.io/v1]
  - ResourceQuota [core/v1]
- Security APIs
  - About Security APIs
  - CertificateSigningRequest [certificates.k8s.io/v1beta1]
  - CredentialsRequest [cloudcredential.openshift.io/v1]
  - PodSecurityPolicyReview [security.openshift.io/v1]
  - PodSecurityPolicySelfSubjectReview [security.openshift.io/v1]
  - PodSecurityPolicySubjectReview [security.openshift.io/v1]
  - RangeAllocation [security.openshift.io/v1]
  - Secret [core/v1]
  - SecurityContextConstraints [security.openshift.io/v1]
  - ServiceAccount [core/v1]
- Storage APIs
  - About Storage APIs
  - CSIDriver [storage.k8s.io/v1beta1]
  - CSINode [storage.k8s.io/v1]
  - PersistentVolumeClaim [core/v1]
  - StorageClass [storage.k8s.io/v1]
  - VolumeAttachment [storage.k8s.io/v1]
  - VolumeSnapshot [snapshot.storage.k8s.io/v1beta1]
  - VolumeSnapshotClass [snapshot.storage.k8s.io/v1beta1]
  - VolumeSnapshotContent [snapshot.storage.k8s.io/v1beta1]
- Template APIs
  - About Template APIs
  - BrokerTemplateInstance [template.openshift.io/v1]
  - PodTemplate [core/v1]
  - Template [template.openshift.io/v1]
  - TemplateInstance [template.openshift.io/v1]
- User and group APIs
  - About User and group APIs
  - Group [user.openshift.io/v1]
  - Identity [user.openshift.io/v1]
  - UserIdentityMapping [user.openshift.io/v1]
  - User [user.openshift.io/v1]
- Workloads APIs
  - About Workloads APIs
  - BuildConfig [build.openshift.io/v1]
  - Build [build.openshift.io/v1]
  - CronJob [batch/v1beta1]
  - DaemonSet [apps/v1]
  - Deployment [apps/v1]
  - DeploymentConfig [apps.openshift.io/v1]
  - Job [batch/v1]
  - Pod [core/v1]
  - ReplicationController [core/v1]
  - PersistentVolume [core/v1]
  - ReplicaSet [apps/v1]
  - StatefulSet [apps/v1]
Service Mesh
- Service Mesh 1.x
Jaeger
- Jaeger release notes
- Jaeger architecture
  - Jaeger architecture
- Jaeger installation
Container-native virtualization
- About container-native virtualization
- Container-native virtualization release notes
  - Container-native virtualization release notes
- Container-native virtualization installation
- Upgrading container-native virtualization
- Using the CLI tools
- Virtual machines
- Virtual machine templates
- Live migration
- Node maintenance
- Node networking
- Logging, events, and monitoring
Serverless applications
- Release Notes
- Support
- Architecture
  - Knative Serving
  - Knative Eventing
- Getting started
- Installing OpenShift Serverless
- Creating and managing serverless applications
- High availability on OpenShift Serverless
- Tracing requests
- Knative Serving
- Knative Eventing
- Event sources
- Using metering with OpenShift Serverless

OVN-Kubernetes features
Supported default CNI network provider feature matrix
Exposed metrics for OVN-Kubernetes

The OpenShift Container Platform cluster uses a virtualized network for pod and service networks. The OVN-Kubernetes Container Network Interface (CNI) plug-in is a network provider for the default cluster network.

OVN-Kubernetes features

The OVN-Kubernetes default Container Network Interface (CNI) network provider implements the following features:

Uses OVN (Open Virtual Network) to manage network traffic flows. OVN is a community developed, vendor agnostic network virtualization solution.
Implements Kubernetes network policy support, including ingress and egress rules.
Uses the Geneve (Generic Network Virtualization Encapsulation) protocol rather than VXLAN to create an overlay network between nodes.

Supported default CNI network provider feature matrix

OpenShift Container Platform offers two supported choices, OpenShift SDN and OVN-Kubernetes, for the default Container Network Interface (CNI) network provider. The following table summarizes the current feature support for both network providers:

Table 1. Default CNI network provider feature comparison
Feature	OVN-Kubernetes ^[1]	OpenShift SDN
Egress IPs	Not supported	Supported
Egress firewall ^[2]	Not supported	Supported
Egress router	Not supported	Supported
Kubernetes network policy	Supported	Partially supported ^[3]
Multicast	Supported	Supported

Available only as a Technology Preview feature in OpenShift Container Platform 4.4.
Egress firewall is also known as egress network policy in OpenShift SDN. This is not the same as network policy egress.
Does not support egress rules and some ipBlock rules.

Exposed metrics for OVN-Kubernetes

The OVN-Kubernetes default Container Network Interface (CNI) network provider exposes certain metrics for use by the Prometheus-based OpenShift Container Platform cluster monitoring stack.

Table 2. Metrics exposed by OVN-Kubernetes
Name	Description
`ovnkube_master_pod_creation_latency_seconds`	The latency between when a pod is created and when the pod is annotated by OVN-Kubernetes. The higher the latency, the more time that elapses before a pod is available for network connectivity.

Additional resources