将K8S集群从v1.2.0升级到v1.3.0

Question

我有一个主人和4个仆从都运行在1.2.0版本上。我计划把它们升级到1.3.0。我要在最短的停机时间内完成这件事。

所以我在一个仆从上做了下面的事情。

systemctl stop kubelet
yum update kubernetes-1.3.0-0.3.git86dc49a.el7
systemctl start kubelet

一旦我打开服务，我就会看到以下错误。

Mar 28 20:36:55 csdp-e2e-kubernetes-minion-6 kubelet[9902]: E0328 20:36:55.215614    9902 kubelet.go:1222] Unable to register node "172.29.240.169" with API server: the body of the request was in an unknown format - accepted media types include: application/json, application/yaml
Mar 28 20:36:55 csdp-e2e-kubernetes-minion-6 kubelet[9902]: E0328 20:36:55.217612    9902 event.go:198] Server rejected event '&api.Event{TypeMeta:unversioned.TypeMeta{Kind:"", APIVersion:""}, ObjectMeta:api.ObjectMeta{Name:"172.29.240.169.14b01ded8fb2d07b", GenerateName:"", Namespace:"default", SelfLink:"", UID:"", ResourceVersion:"", Generation:0, CreationTimestamp:unversioned.Time{Time:time.Time{sec:0, nsec:0, loc:(*time.Location)(nil)}}, DeletionTimestamp:(*unversioned.Time)(nil), DeletionGracePeriodSeconds:(*int64)(nil), Labels:map[string]string(nil), Annotations:map[string]string(nil), OwnerReferences:[]api.OwnerReference(nil), Finalizers:[]string(nil)}, InvolvedObject:api.ObjectReference{Kind:"Node", Namespace:"", Name:"172.29.240.169", UID:"172.29.240.169", APIVersion:"", ResourceVersion:"", FieldPath:""}, Reason:"NodeHasSufficientDisk", Message:"Node 172.29.240.169 status is now: NodeHasSufficientDisk", Source:api.EventSource{Component:"kubelet", Host:"172.29.240.169"}, FirstTimestamp:unversioned.Time{Time:time.Time{sec:63626321182, nsec:814949499, loc:(*time.Location)(0x4c8a780)}}, LastTimestamp:unversioned.Time{Time:time.Time{sec:63626330215, nsec:213372890, loc:(*time.Location)(0x4c8a780)}}, Count:1278, Type:"Normal"}': 'the body of the request was in an unknown format - accepted media types include: application/json, application/yaml' (will not retry!)
Mar 28 20:36:55 csdp-e2e-kubernetes-minion-6 kubelet[9902]: E0328 20:36:55.246100    9902 event.go:198] Server rejected event '&api.Event{TypeMeta:unversioned.TypeMeta{Kind:"", APIVersion:""}, ObjectMeta:api.ObjectMeta{Name:"172.29.240.169.14b01ded8fb2fc88", GenerateName:"", Namespace:"default", SelfLink:"", UID:"", ResourceVersion:"", Generation:0, CreationTimestamp:unversioned.Time{Time:time.Time{sec:0, nsec:0, loc:(*time.Location)(nil)}}, DeletionTimestamp:(*unversioned.Time)(nil), DeletionGracePeriodSeconds:(*int64)(nil), Labels:map[string]string(nil), Annotations:map[string]string(nil), OwnerReferences:[]api.OwnerReference(nil), Finalizers:[]string(nil)}, InvolvedObject:api.ObjectReference{Kind:"Node", Namespace:"", Name:"172.29.240.169", UID:"172.29.240.169", APIVersion:"", ResourceVersion:"", FieldPath:""}, Reason:"NodeHasSufficientMemory", Message:"Node 172.29.240.169 status is now: NodeHasSufficientMemory", Source:api.EventSource{Component:"kubelet", Host:"172.29.240.169"}, FirstTimestamp:unversioned.Time{Time:time.Time{sec:63626321182, nsec:814960776, loc:(*time.Location)(0x4c8a780)}}, LastTimestamp:unversioned.Time{Time:time.Time{sec:63626330215, nsec:213381138, loc:(*time.Location)(0x4c8a780)}}, Count:1278, Type:"Normal"}': 'the body of the request was in an unknown format - accepted media types include: application/json, application/yaml' (will not retry!)

与v1.3.0 ?不兼容

似乎问题在于JSON不兼容？application/json, application/yaml

从大师的观点来看：

[root@kubernetes-master ~]# kubectl get nodes
NAME             STATUS     AGE
172.29.219.105   Ready      3h
172.29.240.146   Ready      3h
172.29.240.168   Ready      3h
172.29.240.169   NotReady   3h

我升级的节点处于NotReady状态。

Answer 1

根据文档，您必须在节点组件(kubelet、kube代理)之前升级主组件(kube-调度器、kube-apiserver和kube-控制器-管理器)。

https://kubernetes.io/docs/getting-started-guides/ubuntu/upgrades/