Kubernetes 自动缩放和堆问题

Question

我正在尝试在我的 kubernetes 集群中设置自动缩放。在为它部署 heapster 和服务之后。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 成功地从 pod 中提取指标并且在

上可用

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"
}
}
]
}
]
}

我运行遇到所有 heapster 版本的这个问题（heapster：canary，v1.2.0-beta.2，v1.1.0）

下面是关于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"}

Custom/On-Premise 集群

OS（例如来自 /etc/os-release）：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 #1 SMP Thu Mar 31 16:04:38 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

中的建议没有解决问题

Answer 1

这是因为版本不匹配 Kubernetes 1.3.5 与 Heapster v1.1.0-beta2 兼容

Kubernetes 自动缩放和堆问题

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