anchor.diff:  if {product-title} ships an out-of-the-box custom metrics adapter.
   
   [id="ocp-cluster-monitoring-alerting-UI"]
  -==== New alerting user interface
  +=== New alerting user interface
   
   An alerting UI is now natively integrated into the {product-title} web console.
   You can now view cluster-level alerts and alerting rules from a single place, as
   well as configure silences.
   
   [id="ocp-cluster-monitoring-telemeter"]
  -==== Telemeter
  +=== Telemeter
   
   Telemeter collects anonymized cluster-related metrics to proactively help
   customers with their {product-title} clusters. This helps:
  
positive.code: component installed on an OpenShift cluster.
  
  [id="ocp-cluster-monitoring-autoscale"]
  ==== Autoscale pods horizontally based on the resource metrics API
  
  By default, OpenShift Cluster Monitoring exposes CPU and Memory utilization
  through the Kubernetes resource metrics API. There is no longer a requirement to
  install a separate metrics server.
  
  [id="ocp-developer-experience"]
  === Developer experience
  
  [id="ocp-multistage-builds"]
  ==== Multi-stage Dockerfile Builds Generally Available
  
  Multi-stage Dockerfiles are now supported in all `Docker` strategy builds.
  
  [id="ocp-registry"]
  === Registry
  
  [id="ocp-registry-managed-by-operator"]
  ==== The registry is now managed by an Operator
  
  The registry is now managed by an Operator instead of `oc adm registry`.
  
  [id="ocp-networking"]
  === Networking
  
  [id="ocp-cno"]
  ==== Cluster Network Operator (CNO)
  
  The cluster network is now configured and managed by an Operator. The Operator
  upgrades and monitors the cluster network.
  
  [id="ocp-openshift-sdn"]
  ==== OpenShift SDN
  
  The default mode is now `NetworkPolicy`.
  
  [id="ocp-multus"]
  ==== Multus
  
  Multus is a meta plug-in for Kubernetes Container Network Interface (CNI), which
  enables a user to create multiple network interfaces per pod.
  
  [id="ocp-sriov"]
  ==== SR-IOV
  
  OpenShift v4 includes the Technical Preview capability to use specific
  SR-IOV hardware on {product-title} nodes, which enables the user to
  
negative.code: network interfaces.
  
  [id="ocp-f5"]
  === F5 router plug-in support
  
  F5 router plug-in is no longer supported as part of {product-title} directly.
  However, F5 has developed a container connector that replaces the functionality.
  It is recommended to work with F5 support to implement their solution.
  
  [id="ocp-web-console"]
  == Web console
  
  [id="ocp-developer-catalog"]
  === Developer Catalog
  
  OpenShift v4 features a redesigned Developer Catalog that brings all of
  the new Operators and existing broker services together, with new ways to
  