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}, `metrics-server`), ` is running properly. Check the service pod and logs in the `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
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}, `kube-system`), ` namespace.`)), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("li", {
parentName: "ol"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `Check the service pod for a status of `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `running`), `. Enter the following command:`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, `# kubectl get pods -n kube-system
`)), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `Then check for the status of `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `running`), `.`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, `NAME READY STATUS RESTARTS AGE
...
metrics-server-6fbfb84cdd-t2fk9 1/1 Running 0 8h
...
`))), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("li", {
parentName: "ol"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `Check the service logs for service availability. Enter the following command:`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, `# kubectl -n kube-system logs metrics-server-6fbfb84cdd-t2fk9
`)), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `Then review the log to confirm that the `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `metrics-server`), ` package is running.`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("details", {
id: "metrics-server-run-check"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("summary", null, "Metrics Server Log Output"), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, `I0723 08:09:56.193136 1 heapster.go:71] /metrics-server --source=kubernetes.summary_api:''
I0723 08:09:56.193574 1 heapster.go:72] Metrics Server version v0.2.1
I0723 08:09:56.194480 1 configs.go:61] Using Kubernetes client with master "https://10.43.0.1:443" and version
I0723 08:09:56.194501 1 configs.go:62] Using kubelet port 10255
I0723 08:09:56.198612 1 heapster.go:128] Starting with Metric Sink
I0723 08:09:56.780114 1 serving.go:308] Generated self-signed cert (apiserver.local.config/certificates/apiserver.crt, apiserver.local.config/certificates/apiserver.key)
I0723 08:09:57.391518 1 heapster.go:101] Starting Heapster API server...
[restful] 2018/07/23 08:09:57 log.go:33: [restful/swagger] listing is available at https:///swaggerapi
[restful] 2018/07/23 08:09:57 log.go:33: [restful/swagger] https:///swaggerui/ is mapped to folder /swagger-ui/
I0723 08:09:57.394080 1 serve.go:85] Serving securely on 0.0.0.0:443
`))))), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("ol", null, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("li", {
parentName: "ol"
}, `Check that the metrics api is accessible from `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "li"
}, `kubectl`), `.`)), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("ul", null, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("li", {
parentName: "ul"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `If you are accessing the cluster through Rancher, enter your Server URL in the `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `kubectl`), ` config in the following format: `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `https://<RANCHER_URL>/k8s/clusters/<CLUSTER_ID>`), `. Add the suffix `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `/k8s/clusters/<CLUSTER_ID>`), ` to API path.`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, `# kubectl get --raw /k8s/clusters/<CLUSTER_ID>/apis/metrics.k8s.io/v1beta1
`)), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `If the API is working correctly, you should receive output similar to the output below.`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, `{"kind":"APIResourceList","apiVersion":"v1","groupVersion":"metrics.k8s.io/v1beta1","resources":[{"name":"nodes","singularName":"","namespaced":false,"kind":"NodeMetrics","verbs":["get","list"]},{"name":"pods","singularName":"","namespaced":true,"kind":"PodMetrics","verbs":["get","list"]}]}
`))), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("li", {
parentName: "ul"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `If you are accessing the cluster directly, enter your Server URL in the kubectl config in the following format: `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `https://<K8s_URL>:6443`), `.`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, `# kubectl get --raw /apis/metrics.k8s.io/v1beta1
`)), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `If the API is working correctly, you should receive output similar to the output below.`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, `{"kind":"APIResourceList","apiVersion":"v1","groupVersion":"metrics.k8s.io/v1beta1","resources":[{"name":"nodes","singularName":"","namespaced":false,"kind":"NodeMetrics","verbs":["get","list"]},{"name":"pods","singularName":"","namespaced":true,"kind":"PodMetrics","verbs":["get","list"]}]}
`)))), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("h3", {
"id": "assigning-additional-required-roles-to-your-hpa"
}, `Assigning Additional Required Roles to Your HPA`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", null, `By default, HPA reads resource and custom metrics with the user `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `system:anonymous`), `. Assign `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `system:anonymous`), ` to `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `view-resource-metrics`), ` and `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `view-custom-metrics`), ` in the ClusterRole and ClusterRoleBindings manifests. These roles are used to access metrics.`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", null, `To do it, follow these steps:`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("ol", null, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("li", {
parentName: "ol"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `Configure `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
parentName: "p"
}, `kubectl`), ` to connect to your cluster.`)), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("li", {
parentName: "ol"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `Copy the ClusterRole and ClusterRoleBinding manifest for the type of metrics you're using for your HPA.`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("details", {
id: "cluster-role-resource-metrics"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("summary", null, "Resource Metrics: ApiGroups resource.metrics.k8s.io"), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, `apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: view-resource-metrics
rules:
- apiGroups:
- metrics.k8s.io
resources:
- pods
- nodes
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: view-resource-metrics
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: view-resource-metrics
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: system:anonymous
`))), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("details", {
id: "cluster-role-custom-resources"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("summary", null, "Custom Metrics: ApiGroups custom.metrics.k8s.io"), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, `apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
name: view-custom-metrics
rules:
- apiGroups:
- custom.metrics.k8s.io
resources:
- "*"
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: view-custom-metrics
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: view-custom-metrics
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: system:anonymous
`)))), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("li", {
parentName: "ol"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", {
parentName: "li"
}, `Create them in your cluster using one of the follow commands, depending on the metrics you're using.`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", {
parentName: "li"
}, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
parentName: "pre"
}, ` # kubectl create -f <RESOURCE_METRICS_MANIFEST>
# kubectl create -f <CUSTOM_METRICS_MANIFEST>
`)))));
}
MDXContent.isMDXComponent = true;
/***/ })
}]);
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