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v1.17.0-alpha.1

Documentation

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Changelog since v1.16.0

Action Required

  • The deprecated feature gates GCERegionalPersistentDisk, EnableAggregatedDiscoveryTimeout and PersistentLocalVolumes are now unconditionally enabled and can no longer be specified in component invocations. (#82472, @draveness)
  • ACTION REQUIRED: (#81668, @darshanime)
    • Deprecate the default service IP CIDR. The previous default was 10.0.0.0/24 which will be removed in 6 months/2 releases. Cluster admins must specify their own desired value, by using --service-cluster-ip-range on kube-apiserver.
  • Remove deprecated "include-uninitialized" flag. action required (#80337, @draveness)

Other notable changes

  • Bump version of event-exporter to 0.3.1, to switch it to protobuf. (#83396, @loburm)
  • kubeadm: use the --service-cluster-ip-range flag to init or use the ServiceSubnet field in the kubeadm config to pass a comma separated list of Service CIDRs. (#82473, @Arvinderpal)
  • Remove MaxPriority in the scheduler API, please use MaxNodeScore or MaxExtenderPriority instead. (#83386, @draveness)
  • Fixes a goroutine leak in kube-apiserver when a request times out. (#83333, @lavalamp)
  • Some scheduler extender API fields are moved from pkg/scheduler/api to pkg/scheduler/apis/extender/v1. (#83262, @Huang-Wei)
  • Fix aggressive VM calls for Azure VMSS (#83102, @feiskyer)
  • Update Azure load balancer to prevent orphaned public IP addresses (#82890, @chewong)
  • Use online nodes instead of possible nodes when discovering available NUMA nodes (#83196, @zouyee)
  • Fix typos in certificates.k8s.io/v1beta1 KeyUsage constant names: UsageContentCommittment becomes UsageContentCommitment and UsageNetscapSGC becomes UsageNetscapeSGC. (#82511, @abursavich)
  • Fixes the bug in informer-gen that it produces incorrect code if a type has nonNamespaced tag set. (#80458, @tatsuhiro-t)
  • Update to go 1.12.10 (#83139, @cblecker)
  • Update crictl to v1.16.1. (#82856, @Random-Liu)
  • Reduces the number of calls made to the Azure API when requesting the instance view of a virtual machine scale set node. (#82496, @hasheddan)
  • Consolidate ScoreWithNormalizePlugin into the ScorePlugin interface (#83042, @draveness)
  • On AWS nodes with multiple network interfaces, kubelet should now more reliably report the same primary node IP. (#80747, @danwinship)
  • Fixes kube-proxy bug accessing self nodeip:port on windows (#83027, @liggitt)
  • Resolves bottleneck in internal API server communication that can cause increased goroutines and degrade API Server performance (#80465, @answer1991)
  • The deprecated mondo kubernetes-test tarball is no longer built. Users running Kubernetes e2e tests should use the kubernetes-test-portable and kubernetes-test-{OS}-{ARCH} tarballs instead. (#83093, @ixdy)
  • Improved performance of kube-proxy with EndpointSlice enabled with more efficient sorting. (#83035, @robscott)
  • New APIs to allow adding/removing pods from pre-calculated prefilter state in the scheduling framework (#82912, @ahg-g)
  • Conformance tests may now include disruptive tests. If you are running tests against a live cluster, consider skipping those tests tagged as Disruptive to avoid non-test workloads being impacted. Be aware, skipping any conformance tests (even disruptive ones) will make the results ineligible for consideration for the CNCF Certified Kubernetes program. (#82664, @johnSchnake)
  • Resolves regression generating informers for packages whose names contain . characters (#82410, @nikhita)
  • Added metrics 'authentication_latency_seconds' that can be used to understand the latency of authentication. (#82409, @RainbowMango)
  • kube-dns add-on: (#82347, @pjbgf)
      • All containers are now being executed under more restrictive privileges.
      • Most of the containers now run as non-root user and has the root filesystem set as read-only.
      • The remaining container running as root only has the minimum Linux capabilities it requires to run.
      • Privilege escalation has been disabled for all containers.
  • k8s dockerconfigjson secrets are now compatible with docker config desktop authentication credentials files (#82148, @bbourbie)
  • Use ipv4 in wincat port forward. (#83036, @liyanhui1228)
  • Added Clone method to the scheduling framework's PluginContext and ContextData. (#82951, @ahg-g)
  • Bump metrics-server to v0.3.5 (#83015, @olagacek)
  • dashboard: disable the dashboard Deployment on non-Linux nodes. This step is required to support Windows worker nodes. (#82975, @wawa0210)
  • Fix possible fd leak and closing of dirs when using openstack (#82873, @odinuge)
  • PersistentVolumeLabel admission plugin, responsible for labeling PersistentVolumes with topology labels, now does not overwrite existing labels on PVs that were dynamically provisioned. It trusts the dynamic provisioning that it provided the correct labels to the PersistentVolume, saving one potentially expensive cloud API call. PersistentVolumes created manually by users are labelled by the admission plugin in the same way as before. (#82830, @jsafrane)
  • Fixes a panic in kube-controller-manager cleaning up bootstrap tokens (#82887, @tedyu)
  • Fixed a scheduler panic when using PodAffinity. (#82841, @Huang-Wei)
  • Modified the scheduling framework's Filter API. (#82842, @ahg-g)
  • Fix panic in kubelet when running IPv4/IPv6 dual-stack mode with a CNI plugin (#82508, @aanm)
  • Kubernetes no longer monitors firewalld. On systems using firewalld for firewall (#81517, @danwinship)
    • maintenance, kube-proxy will take slightly longer to recover from disruptive
    • firewalld operations that delete kube-proxy's iptables rules.
  • Added cloud operation count metrics to azure cloud controller manager. (#82574, @kkmsft)
  • Report non-confusing error for negative storage size in PVC spec. (#82759, @sttts)
  • When registering with a 1.17+ API server, MutatingWebhookConfiguration and ValidatingWebhookConfiguration objects can now request that only v1 AdmissionReview requests be sent to them. Previously, webhooks were required to support receiving v1beta1 AdmissionReview requests as well for compatibility with API servers <= 1.15. (#82707, @liggitt) * When registering with a 1.17+ API server, a CustomResourceDefinition conversion webhook can now request that only v1 ConversionReview requests be sent to them. Previously, conversion webhooks were required to support receiving v1beta1 ConversionReview requests as well for compatibility with API servers <= 1.15.
  • Resolves issue with /readyz and /livez not including etcd and kms health checks (#82713, @logicalhan)
  • fix: azure disk detach failure if node not exists (#82640, @andyzhangx)
  • Single static pod files and pod files from http endpoints cannot be larger than 10 MB. HTTP probe payloads are now truncated to 10KB. (#82669, @rphillips)
  • Restores compatibility with <=1.15.x custom resources by not publishing OpenAPI for non-structural custom resource definitions (#82653, @liggitt)
  • Take the context as the first argument of Schedule. (#82119, @wgliang)
  • Fixes regression in logging spurious stack traces when proxied connections are closed by the backend (#82588, @liggitt)
  • Correct a reference to a not/no longer used kustomize subcommand in the documentation (#82535, @demobox)
  • Limit the body length of exec readiness/liveness probes. remote CRIs and Docker shim read a max of 16MB output of which the exec probe itself inspects 10kb. (#82514, @dims)
  • fixed an issue that the correct PluginConfig.Args is not passed to the corresponding PluginFactory in kube-scheduler when multiple PluginConfig items are defined. (#82483, @everpeace)
  • Adding TerminationGracePeriodSeconds to the test framework API (#82170, @vivekbagade)
  • /test/e2e/framework: Adds a flag "non-blocking-taints" which allows tests to run in environments with tainted nodes. String value should be a comma-separated list. (#81043, @johnSchnake)