anchor.diff:  mechanism.
   
   [id="ocp-4-1-technology-preview"]
  -== Technology Preview features and feature gates
  +== Technology Preview features
   
   Some features in this release are currently in Technology Preview. These
   experimental features are not intended for production use. Please note the
  
positive.code: link:https://access.redhat.com/support/offerings/techpreview[Technology Preview
  Features Support Scope]
  
  Starting in {product-title} 4.1, some _feature gates_, a set of key=value pairs
  that describe Technology Preview features, will ship enabled. You can change the
  default feature gates, but doing so prevents you from upgrading your cluster.
  Any change to a feature gate stops an upgrade. Clusters with a changed feature
  gate must be re-installed to apply even an asynchronous release update.
  
  In the table below, features marked *TP* indicate _Technology Preview_ and
  features marked *GA* indicate _General Availability_.
  
  If a feature is marked *yes;on*, that feature is controlled by a feature gate
  that is enabled, or turned on, when shipped. If a feature is marked *yes;off*,
  that feature is controlled by a feature gate that is disabled, or turned off,
  when shipped.
  
  .Technology Preview Tracker
  [cols="4",options="header"]
  |====
  |Feature |Feature gate |OCP 3.11 |OCP 4.1
  
  |Prometheus Cluster Monitoring
  |
  |GA
  |GA
  
  |Local Storage Persistent Volumes
  |
  |TP
  |TP
  
  |CRI-O for runtime pods
  |
  |GA* footnoteref:[disclaimer, Features marked with `*` indicate delivery in a z-stream patch.]
  |GA
  
  |Tenant Driven Snapshotting
  |
  |TP
  |TP
  
  |`oc` CLI Plug-ins
  |
  |TP
  |TP
  
  |Service Catalog
  |
  |GA
  |GA
  
  |Template Service Broker
  |
  |GA
  |GA
  
  |OpenShift Ansible Service Broker
  |
  |GA
  |GA
  
  |Network Policy
  |
  |GA
  |GA
  
  |Multus
  |
  |-
  |GA
  
  |Service Catalog Initial Experience
  |
  |GA
  |GA
  
  |New Add Project Flow
  |
  |GA
  |GA
  
  |Search Catalog
  |
  |GA
  |GA
  
  |Cron Jobs
  |
  |GA
  |GA
  
  |Kubernetes Deployments
  |
  |GA
  |GA
  
  |StatefulSets
  |
  |GA
  |GA
  
  |Explicit Quota
  |
  |GA
  |GA
  
  |Mount Options
  |
  |GA
  |GA
  
  |System Containers for Docker, CRI-O
  |
  |-
  |-
  
  |Hawkular Agent
  |
  |-
  |-
  
  |Pod PreSets
  |
  |-
  |-
  
  |experimental-qos-reserved
  |
  |TP
  |TP
  
  |Pod sysctls
  |
  |GA
  |GA. See xref:ocp-4-1-known-issues[Known issues] for current limitations.
  
  |Central Audit
  |
  |GA
  |GA
  
  |Static IPs for External Project Traffic
  |
  |GA
  |GA
  
  |Template Completion Detection
  |
  |GA
  |GA
  
  |`replicaSet`
  |
  |GA
  |GA
  
  |Fluentd Mux
  |
  |TP
  |TP
  
  |Clustered MongoDB Template
  |
  |-
  |-
  
  |Clustered MySQL Template
  |
  |-
  |-
  
  |Image Streams with Kubernetes Resources
  |
  |GA
  |GA
  
  |Device Manager
  |
  |GA
  |GA
  
  |Persistent Volume Resize
  |
  |GA
  |GA
  
  |Huge Pages
  |
  |GA
  |GA
  
  |CPU Pinning
  |
  |GA
  |GA
  
  |Admission Webhooks
  |
  |TP
  |GA
  
  |External provisoner for AWS EFS
  |
  |TP
  |TP
  
  |Pod Unidler
  |
  |TP
  |TP
  
  |Node Problem Detector
  |
  |TP
  |TP
  
  |Ephemeral Storage Limit/Requests
  |
  |TP
  |TP
  
  |Descheduler
  |
  |TP
  |TP
  
  |CephFS
  |
  |TP
  |TP
  
  |Podman
  |
  |TP
  |TP
  
  |Kuryr CNI Plug-in
  |
  |TP
  |TP
  
  |Istio
  |
  |TP
  |TP
  
  |Sharing Control of the PID Namespace
  |
  |TP
  |TP
  
  |Manila Provisioner
  |
  |TP
  |TP
  
  |Cluster Administrator console
  |
  |GA
  |GA
  
  |Cluster Autoscaling (AWS Only)
  |
  |GA
  |GA
  
  |Container Storage Interface (CSI)
  |
  |TP
  |TP
  
  |Operator Lifecycle Manager
  |
  |TP
  |GA
  
  |Red Hat OpenShift Service Mesh
  |
  |TP
  |TP
  
  |"Fully Automatic" Egress IPs
  |
  |GA
  |GA
  
  |Pod Priority and Preemption
  |
  |GA
  |GA
  
  |Multi-stage builds in Dockerfiles
  |
  |TP
  |GA
  
  |OVN
  |
  |
  |TP
  
  |HPA custom metrics adapter based on Prometheus
  |
  |
  |TP
  
  |Machine health checks
  |
  |
  |TP
  |====
  
negative.code: xref:../updating/updating-cluster.adoc#updating-cluster[updating your cluster]
  properly.
  ====
  
  [[ocp-4-1]]
  === RHBA-2019:0758 - {product-title} 4.1 Image Release advisory
  
  Issued: 2019-06-04
  
  {product-title} release 4.1 is now available. The list of packages and bug fixes
  includes in the update are documented in the
  link:https://access.redhat.com/errata/RHBA-2019:1173[RHBA-2019:1173] advisory.
  The container images included in the update are provided by the
  link:https://access.redhat.com/errata/RHBA-2019:0758[RHBA-2019:0758] advisory.
  
  Space precluded documenting all of the container images for this release in the
  advisory. See the following sections for notes on the container images in this
  release.
  
  [[ocp-4-1-container-images]]
  ==== Container images
  
  * openshift3/redhat-openshift4-apb-base:v4.1.0-201905291302
  * openshift3/redhat-openshift4-apb-tools:v4.1.0-201905221405
  * openshift3/redhat-openshift4-mariadb-apb:v4.1.0-201905291302
  * openshift3/redhat-openshift4-mediawiki-apb:v4.1.0-201905291302
  * openshift3/redhat-openshift4-mediawiki:v4.1.0-201905221405
  * openshift3/redhat-openshift4-mysql-apb:v4.1.0-201905291302
  * openshift3/redhat-openshift4-ose-ansible-operator:v4.1.0-201905291302
  * openshift3/redhat-openshift4-ose-ansible-service-broker-operator:v4.1.0-201905291711
  * openshift3/redhat-openshift4-ose-ansible-service-broker:v4.1.0-201905221405
  * openshift3/redhat-openshift4-ose-aws-machine-controllers:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-azure-machine-controllers:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-baremetal-machine-controllers:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cli-artifacts:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cli:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cloud-credential-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-authentication-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-autoscaler-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-autoscaler:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-bootstrap:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-capacity:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-config-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-dns-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-image-registry-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-ingress-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-kube-apiserver-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-kube-controller-manager-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-kube-scheduler-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-logging-operator:v4.1.0-201905291736
  * openshift3/redhat-openshift4-ose-cluster-machine-approver:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-monitoring-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-network-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-node-tuned:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-node-tuning-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-openshift-apiserver-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-openshift-controller-manager-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-samples-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-storage-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-svcat-apiserver-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-svcat-controller-manager-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-cluster-update-keys:v4.1.0-201905311324
  * openshift3/redhat-openshift4-ose-cluster-version-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-configmap-reloader:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-console-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-console:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-container-networking-plugins-supported:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-container-networking-plugins-unsupported:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-coredns:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-deployer:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-descheduler-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-descheduler:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-docker-builder:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-docker-registry:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-egress-dns-proxy:v4.1.0-201905221405
  * openshift3/redhat-openshift4-ose-egress-http-proxy:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-egress-router:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-elasticsearch-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-etcd:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-grafana:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-haproxy-router-base:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-haproxy-router:v4.1.0-201905221405
  * openshift3/redhat-openshift4-ose-hyperkube:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-hypershift:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-installer-artifacts:v4.1.0-201905212232
  * openshift3/redhat-openshift4-ose-installer:v4.1.0-201905212232
  * openshift3/redhat-openshift4-ose-jenkins-agent-base:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-jenkins-agent-maven:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-jenkins-agent-nodejs:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-jenkins:v4.1.0-201905221405
  * openshift3/redhat-openshift4-ose-k8s-prometheus-adapter:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-keepalived-ipfailover:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-kube-client-agent:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-kube-etcd-signer-server:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-kube-proxy:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-kube-rbac-proxy:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-kube-state-metrics:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-libvirt-machine-controllers:v4.1.0-201905232339
  * openshift3/redhat-openshift4-ose-logging-curator5:v4.1.0-201905221523
  * openshift3/redhat-openshift4-ose-logging-elasticsearch5:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-logging-eventrouter:v4.1.0-201905221405
  * openshift3/redhat-openshift4-ose-logging-fluentd:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-logging-kibana5:v4.1.0-201905221405
  * openshift3/redhat-openshift4-ose-machine-api-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-machine-config-controller:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-machine-config-daemon:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-machine-config-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-machine-config-server:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-multus-admission-controller:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-multus-cni:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-must-gather:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-node:v4.1.0-201905221405
  * openshift3/redhat-openshift4-ose-oauth-proxy:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-openstack-machine-controllers:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-operator-lifecycle-manager:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-operator-marketplace:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-operator-registry:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-ovn-kubernetes:v4.1.0-201905231545
  * openshift3/redhat-openshift4-ose-pod:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-prom-label-proxy:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-prometheus-alertmanager:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-prometheus-config-reloader:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-prometheus-node-exporter:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-prometheus-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-prometheus:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-recycler:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-service-ca-operator:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-service-catalog:v4.1.0-201905221405
  * openshift3/redhat-openshift4-ose-setup-etcd-environment:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-sriov-cni:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-sriov-dp-admission-controller:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-sriov-network-device-plugin:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-telemeter:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-template-service-broker-operator:v4.1.0-201905291736
  * openshift3/redhat-openshift4-ose-template-service-broker:v4.1.0-201905191700
  * openshift3/redhat-openshift4-ose-tests:v4.1.0-201905191700
  * openshift3/redhat-openshift4-postgres-apb:v4.1.0-201905291302
  