Feature | Justification |
---|---|
Hawkular |
Replaced by Prometheus monitoring. |
Cassandra |
Replaced by Prometheus monitoring. |
Heapster |
Replaced by Metrics-Server or Prometheus metrics adapter. |
Atomic Host |
Replaced by Red Hat CoreOS. |
System containers |
Replaced by Red Hat CoreOS. |
projectatomic/docker-1.13 additional search registries |
CRI-O is the default container runtime for 4.x on RHCOS and Red Hat Enterprise Linux. |
|
Operator-based diagnostics. |
|
Replaced by the registry operator. |
Custom Docker Build Strategy on Builder Pods |
If you want to continue using custom builds, you must replace your Docker invocations with Podman and Buildah. The custom build strategy will not be removed, but the functionality will change significantly in OpenShift Container Platform 4.0. |
Cockpit |
Replaced by Quay. |
Standalone Registry Installations |
Quay is our enterprise container image registry. |
DNSmasq |
CoreDNS will be the default. |
External etcd nodes |
For 4.0, etcd is on the cluster always. |
CloudForms OpenShift Provider and Podified CloudForms |
Replaced by built-in management tooling. |
Volume Provisioning via installer |
Replaced by dynamic volumes or, if NFS is required, NFS provisioner. |
blue-green-installation method |
Ease of upgrade is a core value of 4.0. |
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