- Documentation
- OpenShift Container Platform
- Migrating from version 3 to 4
- About migrating from OpenShift Container Platform 3 to 4 history
Soon, all Red Hat OpenShift documentation will only be available on docs.redhat.com, the official location of all Red Hat product documentation. Get familiar with the updated experience today!
- About
- Release notes
- Getting started
- Architecture
- Installing
- Installation overview
- Selecting an installation method and preparing a cluster
- Disconnected installation mirroring
- Installing on Alibaba
- Preparing to install on Alibaba Cloud
- Creating the required Alibaba Cloud resources
- Installing a cluster quickly on Alibaba Cloud
- Installing a cluster on Alibaba Cloud with customizations
- Installing a cluster on Alibaba Cloud with network customizations
- Installing a cluster on Alibaba Cloud into an existing VPC
- Uninstalling a cluster on Alibaba Cloud
- Installing on AWS
- Preparing to install on AWS
- Configuring an AWS account
- Manually creating IAM
- Installing a cluster quickly on AWS
- Installing a cluster on AWS with customizations
- Installing a cluster on AWS with network customizations
- Installing a cluster on AWS in a restricted network
- Installing a cluster on AWS into an existing VPC
- Installing a private cluster on AWS
- Installing a cluster on AWS into a government region
- Installing a cluster on AWS into a Top Secret Region
- Installing a cluster on AWS into a China region
- Installing a cluster on AWS using CloudFormation templates
- Installing a cluster on AWS in a restricted network with user-provisioned infrastructure
- Uninstalling a cluster on AWS
- Installing on Azure
- Preparing to install on Azure
- Configuring an Azure account
- Manually creating IAM
- Installing a cluster quickly on Azure
- Installing a cluster on Azure with customizations
- Installing a cluster on Azure with network customizations
- Installing a cluster on Azure into an existing VNet
- Installing a private cluster on Azure
- Installing a cluster on Azure into a government region
- Installing a cluster on Azure using ARM templates
- Uninstalling a cluster on Azure
- Installing on Azure Stack Hub
- Preparing to install on Azure Stack Hub
- Configuring an Azure Stack Hub account
- Installing a cluster on Azure Stack Hub with an installer-provisioned infrastructure
- Installing a cluster on Azure Stack Hub with network customizations
- Installing a cluster on Azure Stack Hub using ARM templates
- Uninstalling a cluster on Azure Stack Hub
- Installing on GCP
- Preparing to install on GCP
- Configuring a GCP project
- Manually creating IAM
- Installing a cluster quickly on GCP
- Installing a cluster on GCP with customizations
- Installing a cluster on GCP with network customizations
- Installing a cluster on GCP in a restricted network
- Installing a cluster on GCP into an existing VPC
- Installing a private cluster on GCP
- Installing a cluster on GCP using Deployment Manager templates
- Installing a cluster into a shared VPC on GCP using Deployment Manager templates
- Installing a cluster on GCP in a restricted network with user-provisioned infrastructure
- Uninstalling a cluster on GCP
- Installing on IBM Cloud VPC
- Installing on bare metal
- Installing on-premise with Assisted Installer
- Installing on a single node
- Deploying installer-provisioned clusters on bare metal
- Installing IBM Cloud Bare Metal (Classic)
- Installing with z/VM on IBM Z and LinuxONE
- Installing with RHEL KVM on IBM Z and LinuxONE
- Installing on IBM Power
- Installing on OpenStack
- Preparing to install on OpenStack
- Installing a cluster on OpenStack with customizations
- Installing a cluster on OpenStack with Kuryr
- Installing a cluster that supports SR-IOV compute machines on OpenStack
- Installing a cluster on OpenStack that supports OVS-DPDK-connected compute machines
- Installing a cluster on OpenStack on your own infrastructure
- Installing a cluster on OpenStack with Kuryr on your own infrastructure
- Installing a cluster on OpenStack on your own SR-IOV infrastructure
- Installing a cluster on OpenStack in a restricted network
- OpenStack cloud configuration reference guide
- Uninstalling a cluster on OpenStack
- Uninstalling a cluster on OpenStack from your own infrastructure
- Installing on RHV
- Installing on vSphere
- Preparing to install on vSphere
- Installing a cluster on vSphere
- Installing a cluster on vSphere with customizations
- Installing a cluster on vSphere with network customizations
- Installing a cluster on vSphere with user-provisioned infrastructure
- Installing a cluster on vSphere with user-provisioned infrastructure and network customizations
- Installing a cluster on vSphere in a restricted network
- Installing a cluster on vSphere in a restricted network with user-provisioned infrastructure
- Uninstalling a cluster on vSphere that uses installer-provisioned infrastructure
- Using the vSphere Problem Detector Operator
- Installing on VMC
- Preparing to install on VMC
- Installing a cluster on VMC
- Installing a cluster on VMC with customizations
- Installing a cluster on VMC with network customizations
- Installing a cluster on VMC in a restricted network
- Installing a cluster on VMC with user-provisioned infrastructure
- Installing a cluster on VMC with user-provisioned infrastructure and network customizations
- Installing a cluster on VMC in a restricted network with user-provisioned infrastructure
- Uninstalling a cluster on VMC
- Installing on any platform
- Installation configuration
- Validating an installation
- Troubleshooting installation issues
- Support for FIPS cryptography
- Post-installation configuration
- Post-installation configuration overview
- Configuring a private cluster
- Bare metal configuration
- Machine configuration tasks
- Cluster tasks
- Node tasks
- Network configuration
- Storage configuration
- Preparing for users
- Configuring alert notifications
- Converting a connected cluster to a disconnected cluster
- Configuring additional devices in an IBM Z or LinuxONE environment
- Updating clusters
- Updating clusters overview
- Understanding OpenShift updates
- Understanding update channels and releases
- Understanding OpenShift update duration
- Preparing to perform an EUS-to-EUS update
- Preparing to update a cluster with manually maintained credentials
- Updating a cluster using the web console
- Updating a cluster using the CLI
- Performing update using canary rollout strategy
- Updating a cluster that includes RHEL compute machines
- Updating a cluster in a disconnected environment
- Updating hardware on nodes running on vSphere
- Support
- Support overview
- Managing your cluster resources
- Getting support
- Remote health monitoring with connected clusters
- About remote health monitoring
- Showing data collected by remote health monitoring
- Opting out of remote health reporting
- Enabling remote health reporting
- Using Insights to identify issues with your cluster
- Using Insights Operator
- Using remote health reporting in a restricted network
- Importing simple content access entitlements with Insights Operator
- Gathering data about your cluster
- Summarizing cluster specifications
- Troubleshooting
- Troubleshooting installations
- Verifying node health
- Troubleshooting CRI-O container runtime issues
- Troubleshooting operating system issues
- Troubleshooting network issues
- Troubleshooting Operator issues
- Investigating pod issues
- Troubleshooting the Source-to-Image process
- Troubleshooting storage issues
- Troubleshooting Windows container workload issues
- Investigating monitoring issues
- Diagnosing OpenShift CLI (oc) issues
- Web console
- CLI tools
- Security and compliance
- Security and compliance overview
- Container security
- Understanding container security
- Understanding host and VM security
- Hardening Red Hat Enterprise Linux CoreOS
- Container image signatures
- Understanding compliance
- Securing container content
- Using container registries securely
- Securing the build process
- Deploying containers
- Securing the container platform
- Securing networks
- Securing attached storage
- Monitoring cluster events and logs
- Configuring certificates
- Certificate types and descriptions
- User-provided certificates for the API server
- Proxy certificates
- Service CA certificates
- Node certificates
- Bootstrap certificates
- etcd certificates
- OLM certificates
- Aggregated API client certificates
- Machine Config Operator certificates
- User-provided certificates for default ingress
- Ingress certificates
- Monitoring and cluster logging Operator component certificates
- Control plane certificates
- Compliance Operator
- Compliance Operator release notes
- Supported compliance profiles
- Installing the Compliance Operator
- Updating the Compliance Operator
- Compliance Operator scans
- Understanding the Compliance Operator
- Managing the Compliance Operator
- Tailoring the Compliance Operator
- Retrieving Compliance Operator raw results
- Managing Compliance Operator remediation
- Performing advanced Compliance Operator tasks
- Troubleshooting the Compliance Operator
- Uninstalling the Compliance Operator
- Using the oc-compliance plugin
- Understanding the Custom Resource Definitions
- File Integrity Operator
- cert-manager Operator for Red Hat OpenShift
- Viewing audit logs
- Configuring the audit log policy
- Configuring TLS security profiles
- Configuring seccomp profiles
- Allowing JavaScript-based access to the API server from additional hosts
- Encrypting etcd data
- Scanning pods for vulnerabilities
- Network-Bound Disk Encryption (NBDE)
- Authentication and authorization
- Authentication and authorization overview
- Understanding authentication
- Configuring the internal OAuth server
- Configuring OAuth clients
- Managing user-owned OAuth access tokens
- Understanding identity provider configuration
- Configuring identity providers
- Configuring an htpasswd identity provider
- Configuring a Keystone identity provider
- Configuring an LDAP identity provider
- Configuring a basic authentication identity provider
- Configuring a request header identity provider
- Configuring a GitHub or GitHub Enterprise identity provider
- Configuring a GitLab identity provider
- Configuring a Google identity provider
- Configuring an OpenID Connect identity provider
- Using RBAC to define and apply permissions
- Removing the kubeadmin user
- Understanding and creating service accounts
- Using service accounts in applications
- Using a service account as an OAuth client
- Scoping tokens
- Using bound service account tokens
- Managing security context constraints
- Impersonating the system:admin user
- Syncing LDAP groups
- Managing cloud provider credentials
- Networking
- Understanding networking
- Accessing hosts
- Networking Operators overview
- Understanding the Cluster Network Operator
- Understanding the DNS Operator
- Understanding the Ingress Operator
- Configuring the Ingress Controller endpoint publishing strategy
- Verifying connectivity to an endpoint
- Changing the cluster network MTU
- Configuring the node port service range
- Configuring IP failover
- Using SCTP
- Using PTP hardware
- External DNS Operator
- Understanding the External DNS Operator
- Installing the External DNS Operator
- External DNS Operator configuration parameters
- Creating DNS records on an public hosted zone for AWS
- Creating DNS records on an public zone for Azure
- Creating DNS records on an public managed zone for GCP
- Configuring the cluster-wide proxy on the External DNS Operator
- Network policy
- Multiple networks
- Understanding multiple networks
- Configuring an additional network
- About virtual routing and forwarding
- Configuring multi-network policy
- Attaching a pod to an additional network
- Removing a pod from an additional network
- Editing an additional network
- Removing an additional network
- Assigning a secondary network to a VRF
- Hardware networks
- About Single Root I/O Virtualization (SR-IOV) hardware networks
- Installing the SR-IOV Operator
- Configuring the SR-IOV Operator
- Configuring an SR-IOV network device
- Configuring an SR-IOV Ethernet network attachment
- Configuring an SR-IOV InfiniBand network attachment
- Adding a pod to an SR-IOV network
- Using high performance multicast
- Using DPDK and RDMA
- Using pod-level bonding for secondary networks
- Configuring hardware offloading
- Uninstalling the SR-IOV Operator
- OpenShift SDN default CNI network provider
- About the OpenShift SDN default CNI network provider
- Configuring egress IPs for a project
- Configuring an egress firewall for a project
- Viewing an egress firewall for a project
- Editing an egress firewall for a project
- Removing an egress firewall from a project
- Considerations for the use of an egress router pod
- Deploying an egress router pod in redirect mode
- Deploying an egress router pod in HTTP proxy mode
- Deploying an egress router pod in DNS proxy mode
- Configuring an egress router pod destination list from a config map
- Enabling multicast for a project
- Disabling multicast for a project
- Configuring multitenant isolation
- Configuring kube-proxy
- OVN-Kubernetes default CNI network provider
- About the OVN-Kubernetes network provider
- Migrating from the OpenShift SDN cluster network provider
- Rolling back to the OpenShift SDN cluster network provider
- Converting to IPv4/IPv6 dual stack networking
- IPsec encryption configuration
- Configuring an egress firewall for a project
- Viewing an egress firewall for a project
- Editing an egress firewall for a project
- Removing an egress firewall from a project
- Configuring an egress IP address
- Assigning an egress IP address
- Considerations for the use of an egress router pod
- Deploying an egress router pod in redirect mode
- Enabling multicast for a project
- Disabling multicast for a project
- Tracking network flows
- Configuring hybrid networking
- Configuring Routes
- Configuring ingress cluster traffic
- Overview
- Configuring ExternalIPs for services
- Configuring ingress cluster traffic using an Ingress Controller
- Configuring ingress cluster traffic using a load balancer
- Configuring ingress cluster traffic on AWS using a Network Load Balancer
- Configuring ingress cluster traffic using a service external IP
- Configuring ingress cluster traffic using a NodePort
- Kubernetes NMState
- Configuring the cluster-wide proxy
- Configuring a custom PKI
- Load balancing on OpenStack
- Load balancing with MetalLB
- Associating secondary interfaces metrics to network attachments
- Network Observability
- Network Observability release notes
- Network Observability overview
- Installing the Network Observability Operator
- Understanding Network Observability Operator
- Configuring the Network Observability Operator
- Network Policy
- Observing the network traffic
- Monitoring the Network Observability Operator
- API reference
- JSON flows format reference
- Troubleshooting Network Observability
- Storage
- Storage overview
- Understanding ephemeral storage
- Understanding persistent storage
- Configuring persistent storage
- Persistent storage using AWS Elastic Block Store
- Persistent storage using Azure Disk
- Persistent storage using Azure File
- Persistent storage using Cinder
- Persistent storage using Fibre Channel
- Persistent storage using FlexVolume
- Persistent storage using GCE Persistent Disk
- Persistent storage using hostPath
- Persistent Storage using iSCSI
- Persistent storage using local volumes
- Persistent storage using NFS
- Persistent storage using Red Hat OpenShift Data Foundation
- Persistent storage using VMware vSphere
- Using Container Storage Interface (CSI)
- Configuring CSI volumes
- CSI inline ephemeral volumes
- Shared Resource CSI Driver Operator
- CSI volume snapshots
- CSI volume cloning
- CSI automatic migration
- AliCloud Disk CSI Driver Operator
- AWS Elastic Block Store CSI Driver Operator
- AWS Elastic File Service CSI Driver Operator
- Azure Disk CSI Driver Operator
- Azure File CSI Driver Operator
- Azure Stack Hub CSI Driver Operator
- GCP PD CSI Driver Operator
- IBM VPC Block CSI Driver Operator
- OpenStack Cinder CSI Driver Operator
- OpenStack Manila CSI Driver Operator
- Red Hat Virtualization CSI Driver Operator
- VMware vSphere CSI Driver Operator
- Expanding persistent volumes
- Dynamic provisioning
- Registry
- Registry overview
- Image Registry Operator in OpenShift Container Platform
- Setting up and configuring the registry
- Configuring the registry for AWS user-provisioned infrastructure
- Configuring the registry for GCP user-provisioned infrastructure
- Configuring the registry for OpenStack user-provisioned infrastructure
- Configuring the registry for Azure user-provisioned infrastructure
- Configuring the registry for OpenStack
- Configuring the registry for bare metal
- Configuring the registry for vSphere
- Accessing the registry
- Exposing the registry
- Operators
- Operators overview
- Understanding Operators
- User tasks
- Administrator tasks
- Adding Operators to a cluster
- Updating installed Operators
- Deleting Operators from a cluster
- Configuring OLM features
- Configuring proxy support
- Viewing Operator status
- Managing Operator conditions
- Allowing non-cluster administrators to install Operators
- Managing custom catalogs
- Using OLM on restricted networks
- Catalog source pod scheduling
- Developing Operators
- About the Operator SDK
- Installing the Operator SDK CLI
- Upgrading projects for newer Operator SDK versions
- Go-based Operators
- Ansible-based Operators
- Helm-based Operators
- Defining cluster service versions (CSVs)
- Working with bundle images
- Validating Operators using the scorecard
- High-availability or single-node cluster detection and support
- Configuring built-in monitoring with Prometheus
- Configuring leader election
- Object pruning utility
- Migrating package manifest projects to bundle format
- Operator SDK CLI reference
- Cluster Operators reference
- CI/CD
- CI/CD overview
- Builds
- Understanding image builds
- Understanding build configurations
- Creating build inputs
- Managing build output
- Using build strategies
- Custom image builds with Buildah
- Performing and configuring basic builds
- Triggering and modifying builds
- Performing advanced builds
- Using Red Hat subscriptions in builds
- Securing builds by strategy
- Build configuration resources
- Troubleshooting builds
- Setting up additional trusted certificate authorities for builds
- Migrating from Jenkins to Tekton
- Pipelines
- OpenShift Pipelines release notes
- Understanding OpenShift Pipelines
- Installing OpenShift Pipelines
- Uninstalling OpenShift Pipelines
- Creating CI/CD solutions for applications using OpenShift Pipelines
- Managing non-versioned and versioned cluster tasks
- Using Tekton Hub with OpenShift Pipelines
- Using Pipelines as Code
- Working with OpenShift Pipelines in the web console
- Customizing configurations in the TektonConfig custom resource
- Reducing resource consumption of OpenShift Pipelines
- Setting compute resource quota for OpenShift Pipelines
- Using pods in a privileged security context
- Securing webhooks with event listeners
- Authenticating pipelines using git secret
- Using Tekton Chains for OpenShift Pipelines supply chain security
- Viewing pipeline logs using the OpenShift Logging Operator
- Unprivileged building of container images using Buildah
- GitOps
- OpenShift GitOps release notes
- Understanding OpenShift GitOps
- Installing OpenShift GitOps
- Uninstalling OpenShift GitOps
- Setting up a new Argo CD instance
- Monitoring Argo CD instances
- Configuring an OpenShift cluster by deploying an application with cluster configurations
- Deploying a Spring Boot application with Argo CD
- Argo CD custom resource properties
- Configuring secure communication with Redis
- Monitoring application health status
- Configuring SSO for Argo CD using Dex
- Configuring SSO for Argo CD using Keycloak
- Configuring Argo CD RBAC
- Configuring Resource Quota
- Monitoring Argo CD custom resource workloads
- Viewing Argo CD logs
- Running Control Plane Workloads on Infra nodes
- Sizing requirements for GitOps Operator
- Troubleshooting issues in GitOps
- Images
- Overview of images
- Configuring the Cluster Samples Operator
- Using the Cluster Samples Operator with an alternate registry
- Creating images
- Managing images
- Managing image streams
- Using image streams with Kubernetes resources
- Triggering updates on image stream changes
- Image configuration resources
- Using templates
- Using Ruby on Rails
- Using images
- Building applications
- Building applications overview
- Projects
- Creating applications
- Viewing application composition using the Topology view
- Exporting applications
- Connecting applications to services
- Service Binding Operator release notes
- Understanding Service Binding Operator
- Installing Service Binding Operator
- Getting started with service binding
- Getting started with service binding on IBM Power, IBM Z, and LinuxONE
- Exposing binding data from a service
- Projecting binding data
- Binding workloads using Service Binding Operator
- Connecting an application to a service using the Developer perspective
- Working with Helm charts
- Deployments
- Quotas
- Using config maps with applications
- Monitoring project and application metrics using the Developer perspective
- Monitoring application health
- Editing applications
- Pruning objects to reclaim resources
- Idling applications
- Deleting applications
- Using the Red Hat Marketplace
- Serverless
- Machine management
- Overview of machine management
- Managing compute machines with the Machine API
- Creating a machine set on Alibaba Cloud
- Creating a machine set on AWS
- Creating a machine set on Azure
- Creating a machine set on Azure Stack Hub
- Creating a machine set on GCP
- Creating a machine set on IBM Cloud
- Creating a machine set on OpenStack
- Creating a machine set on RHV
- Creating a machine set on vSphere
- Creating a compute machine set on bare metal
- Manually scaling a machine set
- Modifying a machine set
- Deleting a machine
- Applying autoscaling to a cluster
- Creating infrastructure machine sets
- Adding a RHEL compute machine
- Adding more RHEL compute machines
- Managing user-provisioned infrastructure manually
- Deploying machine health checks
- Nodes
- Overview of nodes
- Working with pods
- About pods
- Viewing pods
- Configuring a cluster for pods
- Automatically scaling pods with the horizontal pod autoscaler
- Automatically adjust pod resource levels with the vertical pod autoscaler
- Providing sensitive data to pods
- Creating and using config maps
- Using Device Manager to make devices available to nodes
- Including pod priority in pod scheduling decisions
- Placing pods on specific nodes using node selectors
- Automatically scaling pods with the Custom Metrics Autoscaler Operator
- Custom Metrics Autoscaler Operator overview
- Custom Metrics Autoscaler Operator release notes
- Installing the custom metrics autoscaler
- Understanding the custom metrics autoscaler triggers
- Understanding the custom metrics autoscaler trigger authentications
- Pausing the custom metrics autoscaler
- Gathering audit logs
- Gathering debugging data
- Viewing Operator metrics
- Understanding how to add custom metrics autoscalers
- Removing the Custom Metrics Autoscaler Operator
- Controlling pod placement onto nodes (scheduling)
- About pod placement using the scheduler
- Scheduling pods using a scheduler profile
- Placing pods relative to other pods using pod affinity and anti-affinity rules
- Controlling pod placement on nodes using node affinity rules
- Placing pods onto overcommited nodes
- Controlling pod placement using node taints
- Placing pods on specific nodes using node selectors
- Controlling pod placement using pod topology spread constraints
- Running a custom scheduler
- Evicting pods using the descheduler
- Secondary scheduler
- Using Jobs and DaemonSets
- Working with nodes
- Viewing and listing the nodes in your cluster
- Working with nodes
- Managing nodes
- Managing the maximum number of pods per node
- Using the Node Tuning Operator
- Remediating nodes with the Poison Pill Operator
- Deploying node health checks by using the Node Health Check Operator
- Using the Node Maintenance Operator to place nodes in maintenance mode
- Understanding node rebooting
- Freeing node resources using garbage collection
- Allocating resources for nodes
- Allocating specific CPUs for nodes in a cluster
- Enabling TLS security profiles for the kubelet
- Machine Config Daemon metrics
- Creating infrastructure nodes
- Working with containers
- Using containers
- Using Init Containers to perform tasks before a pod is deployed
- Using volumes to persist container data
- Mapping volumes using projected volumes
- Allowing containers to consume API objects
- Copying files to or from a container
- Executing remote commands in a container
- Using port forwarding to access applications in a container
- Using sysctls in containers
- Working with clusters
- Viewing system event information in a cluster
- Analyzing cluster resource levels
- Configuring a cluster for pods
- Setting limit ranges
- Configuring cluster memory to meet container memory and risk requirements
- Configuring your cluster to place pods on overcommited nodes
- Enabling features using FeatureGates
- Remote worker nodes on the network edge
- Windows Container Support for OpenShift
- Red Hat OpenShift support for Windows Containers overview
- Red Hat OpenShift support for Windows Containers release notes
- Understanding Windows container workloads
- Enabling Windows container workloads
- Creating Windows machine sets
- Scheduling Windows container workloads
- Windows node upgrades
- Using Bring-Your-Own-Host Windows instances as nodes
- Removing Windows nodes
- Disabling Windows container workloads
- Sandboxed Containers Support for OpenShift
- OpenShift sandboxed containers release notes
- Understanding OpenShift sandboxed containers
- Deploying OpenShift sandboxed containers workloads
- Monitoring OpenShift sandboxed containers
- Uninstalling OpenShift sandboxed containers
- Upgrading OpenShift sandboxed containers
- Collecting OpenShift sandboxed containers data
- Logging
- Release notes
- Support
- Logging 5.6
- Logging 5.5
- About Logging
- Installing Logging
- Configuring your Logging deployment
- About the Cluster Logging custom resource
- Configuring the logging collector
- Configuring the log store
- Configuring the log visualizer
- Configuring Logging storage
- Configuring CPU and memory limits for Logging components
- Using tolerations to control Logging pod placement
- Moving the Logging resources with node selectors
- Configuring systemd-journald for Logging
- Maintenance and support
- Logging using LokiStack
- Viewing logs for a specific resource
- Viewing cluster logs in Kibana
- Forwarding logs to third party systems
- Enabling JSON logging
- Collecting and storing Kubernetes events
- Updating Logging
- Viewing cluster dashboards
- Troubleshooting Logging
- Uninstalling Logging
- Exported fields
- Monitoring
- Monitoring overview
- Configuring the monitoring stack
- Enabling monitoring for user-defined projects
- Enabling alert routing for user-defined projects
- Managing metrics
- Managing metrics targets
- Managing alerts
- Reviewing monitoring dashboards
- Monitoring bare-metal events
- Accessing third-party monitoring UIs and APIs
- Troubleshooting monitoring issues
- ConfigMap reference for Cluster Monitoring Operator
- Scalability and performance
- Recommended host practices
- Recommended host practices for IBM Z & LinuxONE environments
- Recommended cluster scaling practices
- Using the Node Tuning Operator
- Using CPU Manager and Topology Manager
- Scheduling NUMA-aware workloads
- Scaling the Cluster Monitoring Operator
- Planning your environment according to object maximums
- Optimizing storage
- Optimizing routing
- Optimizing networking
- Managing bare metal hosts
- What huge pages do and how they are consumed by apps
- Performance Addon Operator for low latency nodes
- Performing latency tests for platform verification
- Topology Aware Lifecycle Manager for cluster updates
- Creating a performance profile
- Workload partitioning on single-node OpenShift
- Clusters at the network far edge
- Challenges of the network far edge
- Preparing the hub cluster for ZTP
- Installing managed clusters with RHACM and SiteConfig resources
- Configuring managed clusters with policies and PolicyGenTemplate resources
- Manually installing a single-node OpenShift cluster with ZTP
- Recommended single-node OpenShift cluster configuration for vDU application workloads
- Validating cluster tuning for vDU application workloads
- Advanced managed cluster configuration with SiteConfig resources
- Advanced managed cluster configuration with PolicyGenTemplate resources
- Updating managed clusters with the Topology Aware Lifecycle Manager
- Updating GitOps ZTP
- Specialized hardware and driver enablement
- Backup and restore
- Overview of backup and restore operations
- Shutting down a cluster gracefully
- Restarting a cluster gracefully
- Application backup and restore
- Control plane backup and restore
- Migrating from version 3 to 4
- Migrating from version 3 to 4 overview
- About migrating from OpenShift Container Platform 3 to 4
- Differences between OpenShift Container Platform 3 and 4
- Network considerations
- About MTC
- Installing MTC
- Installing MTC in a restricted network environment
- Upgrading MTC
- Premigration checklists
- Migrating your applications
- Advanced migration options
- Troubleshooting
- Migration Toolkit for Containers
- API reference
- Understanding API tiers
- API compatibility guidelines
- Editing kubelet log level verbosity and gathering logs
- API list
- Common object reference
- 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]
- TokenRequest [authentication.k8s.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
- 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]
- HelmChartRepository [helm.openshift.io/v1beta1]
- Image [config.openshift.io/v1]
- ImageContentPolicy [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]
- ConsolePlugin [console.openshift.io/v1alpha1]
- ConsoleQuickStart [console.openshift.io/v1]
- ConsoleYAMLSample [console.openshift.io/v1]
- Extension APIs
- 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]
- ImageStreamLayers [image.openshift.io/v1]
- ImageStreamMapping [image.openshift.io/v1]
- ImageStream [image.openshift.io/v1]
- ImageStreamTag [image.openshift.io/v1]
- ImageTag [image.openshift.io/v1]
- SecretList [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
- Monitoring APIs
- About Monitoring APIs
- Alertmanager [monitoring.coreos.com/v1]
- AlertmanagerConfig [monitoring.coreos.com/v1alpha1]
- PodMonitor [monitoring.coreos.com/v1]
- Probe [monitoring.coreos.com/v1]
- Prometheus [monitoring.coreos.com/v1]
- PrometheusRule [monitoring.coreos.com/v1]
- ServiceMonitor [monitoring.coreos.com/v1]
- ThanosRuler [monitoring.coreos.com/v1]
- Network APIs
- About Network APIs
- ClusterNetwork [network.openshift.io/v1]
- Endpoints [v1]
- EndpointSlice [discovery.k8s.io/v1]
- EgressNetworkPolicy [network.openshift.io/v1]
- EgressRouter [network.operator.openshift.io/v1]
- HostSubnet [network.openshift.io/v1]
- Ingress [networking.k8s.io/v1]
- IngressClass [networking.k8s.io/v1]
- IPPool [whereabouts.cni.cncf.io/v1alpha1]
- NetNamespace [network.openshift.io/v1]
- NetworkAttachmentDefinition [k8s.cni.cncf.io/v1]
- NetworkPolicy [networking.k8s.io/v1]
- PodNetworkConnectivityCheck [controlplane.operator.openshift.io/v1alpha1]
- Route [route.openshift.io/v1]
- Service [v1]
- Node APIs
- OAuth APIs
- Operator APIs
- About Operator APIs
- Authentication [operator.openshift.io/v1]
- CloudCredential [operator.openshift.io/v1]
- ClusterCSIDriver [operator.openshift.io/v1]
- Console [operator.openshift.io/v1]
- Config [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]
- OperatorPKI [network.operator.openshift.io/v1]
- ServiceCA [operator.openshift.io/v1]
- Storage [operator.openshift.io/v1]
- OperatorHub APIs
- About OperatorHub APIs
- CatalogSource [operators.coreos.com/v1alpha1]
- ClusterServiceVersion [operators.coreos.com/v1alpha1]
- InstallPlan [operators.coreos.com/v1alpha1]
- Operator [operators.coreos.com/v1]
- OperatorCondition [operators.coreos.com/v2]
- OperatorGroup [operators.coreos.com/v1]
- PackageManifest [packages.operators.coreos.com/v1]
- Subscription [operators.coreos.com/v1alpha1]
- Policy APIs
- Project APIs
- Provisioning APIs
- RBAC APIs
- Role APIs
- Schedule and quota APIs
- About Schedule and quota APIs
- AppliedClusterResourceQuota [quota.openshift.io/v1]
- ClusterResourceQuota [quota.openshift.io/v1]
- FlowSchema [flowcontrol.apiserver.k8s.io/v1beta1]
- LimitRange [v1]
- PriorityClass [scheduling.k8s.io/v1]
- PriorityLevelConfiguration [flowcontrol.apiserver.k8s.io/v1beta1]
- ResourceQuota [v1]
- Security APIs
- About Security APIs
- CertificateSigningRequest [certificates.k8s.io/v1]
- 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 [v1]
- SecurityContextConstraints [security.openshift.io/v1]
- ServiceAccount [v1]
- Storage APIs
- About Storage APIs
- CSIDriver [storage.k8s.io/v1]
- CSINode [storage.k8s.io/v1]
- CSIStorageCapacity [storage.k8s.io/v1beta1]
- PersistentVolumeClaim [v1]
- StorageClass [storage.k8s.io/v1]
- StorageState [migration.k8s.io/v1alpha1]
- StorageVersionMigration [migration.k8s.io/v1alpha1]
- VolumeAttachment [storage.k8s.io/v1]
- VolumeSnapshot [snapshot.storage.k8s.io/v1]
- VolumeSnapshotClass [snapshot.storage.k8s.io/v1]
- VolumeSnapshotContent [snapshot.storage.k8s.io/v1]
- Template APIs
- User and group APIs
- Workloads APIs
- About Workloads APIs
- BuildConfig [build.openshift.io/v1]
- Build [build.openshift.io/v1]
- BuildLog [build.openshift.io/v1]
- BuildRequest [build.openshift.io/v1]
- CronJob [batch/v1]
- DaemonSet [apps/v1]
- Deployment [apps/v1]
- DeploymentConfig [apps.openshift.io/v1]
- DeploymentConfigRollback [apps.openshift.io/v1]
- DeploymentLog [apps.openshift.io/v1]
- DeploymentRequest [apps.openshift.io/v1]
- Job [batch/v1]
- Pod [v1]
- ReplicationController [v1]
- PersistentVolume [v1]
- ReplicaSet [apps/v1]
- StatefulSet [apps/v1]
- Service Mesh
- Service Mesh 2.x
- About OpenShift Service Mesh
- Service Mesh 2.x release notes
- Service Mesh architecture
- Service Mesh deployment models
- Service Mesh and Istio differences
- Preparing to install Service Mesh
- Installing the Operators
- Creating the ServiceMeshControlPlane
- Adding services to a service mesh
- Enabling sidecar injection
- Upgrading Service Mesh
- Managing users and profiles
- Security
- Traffic management
- Metrics, logs, and traces
- Performance and scalability
- Deploying to production
- Federation
- Extensions
- 3scale WebAssembly for 2.1
- 3scale Istio adapter for 2.0
- Troubleshooting Service Mesh
- Control plane configuration reference
- Kiali configuration reference
- Jaeger configuration reference
- Uninstalling Service Mesh
- Service Mesh 1.x
- Service Mesh 1.x release notes
- Service Mesh architecture
- Service Mesh and Istio differences
- Preparing to install Service Mesh
- Installing Service Mesh
- Security
- Traffic management
- Deploying applications on Service Mesh
- Data visualization and observability
- Custom resources
- 3scale Istio adapter for 1.x
- Removing Service Mesh
- Service Mesh 2.x
- Distributed tracing
- Virtualization
- About OpenShift Virtualization
- Getting started with OpenShift Virtualization
- OpenShift Virtualization release notes
- Installing
- Preparing your cluster for OpenShift Virtualization
- Specifying nodes for OpenShift Virtualization components
- Installing OpenShift Virtualization using the web console
- Installing OpenShift Virtualization using the CLI
- Enabling the virtctl client
- Uninstalling OpenShift Virtualization using the web console
- Uninstalling OpenShift Virtualization using the CLI
- Updating OpenShift Virtualization
- Additional security privileges granted for kubevirt-controller and virt-launcher
- Using the CLI tools
- Virtual machines
- Creating virtual machines
- Editing virtual machines
- Editing boot order
- Deleting virtual machines
- Managing virtual machine instances
- Controlling virtual machine states
- Accessing virtual machine consoles
- Automating Windows installation with sysprep
- Triggering virtual machine failover by resolving a failed node
- Installing the QEMU guest agent on virtual machines
- Viewing the QEMU guest agent information for virtual machines
- Managing config maps, secrets, and service accounts in virtual machines
- Installing VirtIO driver on an existing Windows virtual machine
- Installing VirtIO driver on a new Windows virtual machine
- Advanced virtual machine management
- Working with resource quotas for virtual machines
- Specifying nodes for virtual machines
- Configuring certificate rotation
- Automating management tasks
- UEFI mode for virtual machines
- Configuring PXE booting for virtual machines
- Using huge pages with virtual machines
- Enabling dedicated resources for a virtual machine
- Scheduling virtual machines
- Configuring PCI passthrough
- Configuring vGPU passthrough
- Configuring mediated devices
- Configuring a watchdog device
- Automatic importing and updating of pre-defined boot sources
- Enabling descheduler evictions on virtual machines
- Importing virtual machines
- Cloning virtual machines
- Virtual machine networking
- Configuring a virtual machine for the default pod network
- Creating a service to expose a virtual machine
- Connecting a virtual machine to a Linux bridge network
- Connecting a virtual machine to an SR-IOV network
- Connecting a virtual machine to a service mesh
- Configuring IP addresses for virtual machines
- Viewing the IP address of NICs on a virtual machine
- Using a MAC address pool for virtual machines
- Virtual machine disks
- Features for storage
- Configuring local storage for virtual machines
- Creating data volumes
- Configuring CDI to work with namespaces that have a compute resource quota
- Managing data volume annotations
- Using preallocation for data volumes
- Uploading local disk images by using the web console
- Uploading local disk images by using the virtctl tool
- Uploading a local disk image to a block storage data volume
- Managing virtual machine snapshots
- Moving a local virtual machine disk to a different node
- Expanding virtual storage by adding blank disk images
- Cloning a data volume using smart-cloning
- Creating and using boot sources
- Hot-plugging virtual disks
- Using container disks with virtual machines
- Preparing CDI scratch space
- Re-using statically provisioned persistent volumes
- Expanding a virtual machine disk
- Deleting data volumes
- Virtual machine templates
- Live migration
- Virtual machine live migration
- Live migration limits and timeouts
- Migrating a virtual machine instance to another node
- Migrating a virtual machine over a dedicated additional network
- Monitoring live migration of a virtual machine instance
- Cancelling the live migration of a virtual machine instance
- Configuring virtual machine eviction strategy
- Node maintenance
- Node networking
- Logging, events, and monitoring
- Reviewing virtualization overview
- Viewing logs
- Viewing events
- Diagnosing data volumes using events and conditions
- Viewing information about virtual machine workloads
- Monitoring virtual machine health
- Viewing cluster information
- Reviewing resource usage by virtual machines
- OpenShift cluster monitoring, logging, and Telemetry
- Prometheus queries for virtual resources
- Exposing custom metrics for virtual machines
- OpenShift Virtualization critical alerts
- Collecting data for Red Hat Support
- Backup and restore
×
About migrating from OpenShift Container Platform 3 to 4
OpenShift Container Platform 4 contains new technologies and functionality that result in a cluster that is self-managing, flexible, and automated. OpenShift Container Platform 4 clusters are deployed and managed very differently from OpenShift Container Platform 3.
The most effective way to migrate from OpenShift Container Platform 3 to 4 is by using a CI/CD pipeline to automate deployments in an application lifecycle management framework.
If you do not have a CI/CD pipeline or if you are migrating stateful applications, you can use the Migration Toolkit for Containers (MTC) to migrate your application workloads.
You can use Red Hat Advanced Cluster Management for Kubernetes to help you import and manage your OpenShift Container Platform 3 clusters easily, enforce policies, and redeploy your applications. Take advantage of the free subscription to use Red Hat Advanced Cluster Management to simplify your migration process.
To successfully transition to OpenShift Container Platform 4, review the following information:
- Differences between OpenShift Container Platform 3 and 4
-
-
Architecture
-
Installation and upgrade
-
Storage, network, logging, security, and monitoring considerations
-
- About the Migration Toolkit for Containers
-
-
Workflow
-
File system and snapshot copy methods for persistent volumes (PVs)
-
Direct volume migration
-
Direct image migration
-
- Advanced migration options
-
-
Automating your migration with migration hooks
-
Using the MTC API
-
Excluding resources from a migration plan
-
Configuring the
MigrationControllercustom resource for large-scale migrations -
Enabling automatic PV resizing for direct volume migration
-
Enabling cached Kubernetes clients for improved performance
-
For new features and enhancements, technical changes, and known issues, see the MTC release notes.