Kubernetes自动标度和堆问题

Question

我正试图在我的kubernetes集群中设置自动标度。在部署了heapster和它的服务之后。我正面临以下错误。

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成功地从荚中提取指标，并可在

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"
}
}
]
}
]
}

我遇到了所有堆程序版本的问题( heapster :canary，v1.2.0-beta.2，v1.1.0 )

下面是关于我的环境的更多细节

Kubernetes版本客户端版本:version.Info{主：“1”，小调：“3”，GitVersion:"v1.3.5"，version.Info GitTreeState：“干净”，BuildDate:"2016-08-11T20:29:08Z"，GoVersion:"go1.6.2"，编译器：“gc”，平台：“linux/amd64 64”}服务器版本:version.Info{Minor：“1”，未成年人：“3”，GitVersion:"v1.3.5"，GitCommit:"b0deb2eb8f4037421077f77cb163dbb4c0a2a9f5"，GitTreeState：“干净”，BuildDate:"2016-08-11T20:21:58Z"，GoVersion:"go1.6.2"，编译器：“gc”，平台：“linux/amd64 64”}

自定义/前提集群

操作系统(例如来自/etc/ OS发行版)：NAME=“CentOS Linux”VERSION=7(核心)内核(例如uname -a)：Linux dev1-132869446-3-157772786 3.10.0-327.13.1.el7.x86_64 # SMP清华31 16:04:38 UTC 2016 x86_64 GNU/Linux

Autoscaling (HPA) failed to get CPU consumption: cannot unmarshal object into Go value of type []v1alpha1.PodMetrics中的推荐并不能解决这个问题

Answer 1

这是因为版本错配的Kubernetes 1.3.5与Heapster v1.1.0-beta2一起工作。