Kubernetes v1.4.0-alpha.2 發布，Google云平臺的開源容器集群管理系統
Kubernetes是Google開源的容器集群管理系統，其提供應用部署、維護、 擴展機制等功能。利用Kubernetes能方便地管理跨機器運行容器化的應用。
如果你曾經用過Docker容器技術部署容器，那么可以將Docker看成Kubernetes內部使用的低級別組件。Kubernetes不僅僅支持Docker，還支持Rocket，這是另一種容器技術。
使用Kubernetes可以：
- 自動化容器的部署和復制
- 隨時擴展或收縮容器規模
- 將容器組織成組，并且提供容器間的負載均衡
- 很容易地升級應用程序容器的新版本
- 提供容器彈性，如果容器失效就替換它，等等...
更新日志
Action Required
- Federation API server kubeconfig secret consumed by federation-controller-manager has a new name. (#28938,@madhusudancs)
- If you are upgrading your Cluster Federation components from v1.3.x, please run this command to migrate the federation-apiserver-secret to federation-apiserver-kubeconfig serect;
- $ kubectl --namespace=federation get secret federation-apiserver-secret -o json | sed 's/federation-apiserver-secret/federation-apiserver-kubeconfig/g' | kubectl create -f -
- You might also want to delete the old secret using this command:
- $ kubectl delete secret --namespace=federation federation-apiserver-secret
- Stop eating panics (#28800, @lavalamp) </ul>
- Add API for StorageClasses (#29694, @childsb)
- Fix kubectl help command (#29737, @andreykurilin)
- add shorthand cm for configmaps (#29652, @lojies)
- Bump cadvisor dependencies to latest head. (#29492, @Random-Liu)
- If a service of type node port declares multiple ports, quota on "services.nodeports" will charge for each port in the service. (#29457, @derekwaynecarr)
- Add an Azure CloudProvider Implementation (#28821, @colemickens)
- Add support for kubectl create quota command (#28351, @sttts)
- Assume volume is detached if node doesn't exist (#29485, @saad-ali)
- kube-up: increase download timeout for kubernetes.tar.gz (#29426, @justinsb)
- Allow multiple APIs to register for the same API Group (#28414, @brendandburns)
- Fix a problem with multiple APIs clobbering each other in registration. (#28431, @brendandburns)
- Removing images with multiple tags (#29316, @ronnielai)
- add enhanced volume and mount logging for block devices (#24797, @screeley44)
- append an abac rule for $KUBE_USER. (#29164, @cjcullen)
- add tokenreviews endpoint to implement webhook (#28788, @deads2k)
- Fix "PVC Volume not detached if pod deleted via namespace deletion" issue (#29077, @saad-ali)
- Allow mounts to run in parallel for non-attachable volumes (#28939, @saad-ali)
- Fix working_set calculation in kubelet (#29153, @vishh)
- Fix RBAC authorizer of ServiceAccount (#29071, @albatross0)
- kubectl proxy changed to now allow urls to pods with "attach" or "exec" in the pod name (#28765, @nhlfr)
- AWS: Added experimental option to skip zone check (#28417, @kevensen)
- Ubuntu: Enable ssh compression when downloading binaries during cluster creation (#26746, @MHBauer)
- Add extensions/replicaset to federation-apiserver (#24764, @jianhuiz)
- federation: Adding namespaces API (#26298, @nikhiljindal)
- Improve quota controller performance by eliminating unneeded list calls (#29134, @derekwaynecarr)
- Make Daemonset use GeneralPredicates (#28803, @lukaszo)
- Update docker engine-api to dea108d3aa (#29144, @ronnielai)
- Fixing kube-up for CVM masters. (#29140, @maisem)
- Fix logrotate config on GCI (#29139, @adityakali)
- GCE bring-up: Differentiate NODE_TAGS from NODE_INSTANCE_PREFIX (#29141, @zmerlynn)
- hyperkube: fix build for 3rd party registry (again) (#28489, @liyimeng)
- Detect flakes in PR builder e2e runs (#27898, @lavalamp)
- Remove examples moved to docs site (#23513, @erictune)
- Do not query the metadata server to find out if running on GCE. Retry metadata server query for gcr if running on gce. (#28871, @vishh)
- Change maxsize to size in logrotate. (#29128, @bprashanth)
- Change setting "kubectl --record=false" to stop updating the change-cause when a previous change-cause is found. (#28234, @damemi)
- Add "kubectl --overwrite" flag to automatically resolve conflicts between the modified and live configuration using values from the modified configuration. (#26136, @AdoHe)
- Make discovery summarizer call servers in parallel (#26705, @nebril)
- Don't recreate lb cloud resources on kcm restart (#29082, @bprashanth)
- List all nodes and occupy cidr map before starting allocations (#29062, @bprashanth)
- Fix GPU resource validation (#28743, @therc)
- Make PD E2E Tests Wait for Detach to Prevent Kernel Errors (#29031, @saad-ali)
- Scale kube-proxy conntrack limits by cores (new default behavior) (#28876, @thockin)
- [Kubelet] Improving QOS in kubelet by introducing QoS level Cgroups -
--cgroups-per-qos(#27853, @dubstack) - AWS: Add ap-south-1 to list of known AWS regions (#28428, @justinsb)
- Add RELEASE_INFRA_PUSH related code to support pushes from kubernetes/release. (#28922, @david-mcmahon)
- Fix watch cache filtering (#28966, @liggitt)
- Deprecate deleting-pods-burst ControllerManager flag (#28882, @gmarek)
- Add support for terminal resizing for exec, attach, and run. Note that for Docker, exec sessions (#25273, @ncdc)
- inherit the environment from the primary process, so if the container was created with tty=false,
- that means the exec session's TERM variable will default to "dumb". Users can override this by
- setting TERM=xterm (or whatever is appropriate) to get the correct "smart" terminal behavior.
- Implement alpha version of PreferAvoidPods (#20699, @jiangyaoguo)
- Retry when apiserver fails to listen on insecure port (#28797, @aaronlevy)
- Add SSH_OPTS to config ssh and scp port (#28872, @lojies)
- kube-up: install new Docker pre-requisite (libltdl7) when not in image (#28745, @justinsb)
- Separate rate limiters for Pod evictions for different zones in NodeController (#28843, @gmarek)
- Add --quiet to hide the 'waiting for pods to be running' message in kubectl run (#28801, @janetkuo)
- Controllers doesn't take any actions when being deleted. (#27438, @gmarek)
- Add "deploy" abbrev for deployments to kubectl (#24087, @Frostman)
- --no-header available now for custom-column (#26696, @gitfred) </ul>
其它顯著的變化
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