Kubernetes自动扩展和堆问题

Question

我正在尝试在kubernetes集群中设置自动缩放。 部署了heapster及其服务之后。 我面临以下错误。

horizontal.go:99] Failed to reconcile nginx: failed to compute desired number of replicas based on CPU utilization for Deployment/default/nginx: failed to get CPU utilization: failed to get CPU consumption and request: failed to unmarshall heapster response: json: cannot unmarshal object into Go value of type []v1alpha1.PodMetrics
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: I0909 18:15:37.432445 27951 horizontal.go:403] Successfully updated status for nginx
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: }
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: ]
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: }
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: ]
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: }
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: }
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "memory": "1512Ki"
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "cpu": "0",
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "usage": {
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "name": "nginx",
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: {
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "containers": [
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "window": "1m0s",
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "timestamp": "2016-09-09T18:15:00Z",
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: },
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "creationTimestamp": "2016-09-09T18:15:37Z"
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "namespace": "default",
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "name": "nginx-24809263-3idn3",
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "metadata": {
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: {
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "items": [
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: "metadata": {},
Sep 09 18:15:37 dev1-132869446-3-157772786 kube-controller-manager[27951]: I0909 18:15:37.424164 27951 metrics_client.go:166] Heapster metrics result: {

Heapster已成功从吊舱中提取指标，并且可用于

http：// master：8080 / api / v1 / proxy / namespaces / kube-system / services / heapster / apis / metrics / v1alpha1 / namespaces / default / pods

{
"metadata": {},
"items": [
{
"metadata": {
"name": "nginx-24809263-3idn3",
"namespace": "default",
"creationTimestamp": "2016-09-10T02:57:03Z"
},
"timestamp": "2016-09-10T02:56:00Z",
"window": "1m0s",
"containers": [
{
"name": "nginx",
"usage": {
"cpu": "0",
"memory": "1400Ki"
}
}
]
}
]
}

我在所有heapster版本（heapster：canary，v1.2.0-beta.2，v1.1.0）中都遇到了这个问题

以下是有关我的环境的更多详细信息

Kubernetes版本客户端版本：version.Info {主要：“ 1”，次要：“ 3”，GitVersion：“ v1.3.5”，GitCommit：“ b0deb2eb8f4037421077f77cb163dbb4c0a2a9f5”，GitTreeState：“ clean”，BuildDate：“ 2016-08-11T20： 29：08Z“，GoVersion：” go1.6.2“，编译器：” gc“，平台：” linux / amd64“}服务器版本：version.Info {主要：” 1“，次要：” 3“，GitVersion：” v1 .3.5“，GitCommit：” b0deb2eb8f4037421077f77cb163dbb4c0a2a9f5“，GitTreeState：” clean“，BuildDate：” 2016-08-11T20：21：58Z“，GoVersion：” go1.6.2“，编译器：” gc“，平台：” linux / amd64 “}

自定义/本地群集

操作系统（例如来自/ etc / os-release）：NAME =“ CentOS Linux” VERSION =“ 7（Core）”内核（例如uname -a）：Linux dev1-132869446-3-157772786 3.10.0-327.13.1。 el7.x86_64＃1 SMP 2016年3月31日星期四16:04:38 UTC 2016 x86_64 x86_64 x86_64 GNU / Linux

自动缩放（HPA）中的建议无法获取CPU消耗：无法将对象解组为[] v1alpha1.PodMetrics类型的Go值

Answer 1

这是由于版本不匹配导致Kubernetes 1.3.5与Heapster v1.1.0-beta2一起使用