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* vultr implementation * increase/decrease * vultr cleanup + changse * fix golint errors * adding support for API fields * fixing missing clusterID * fixing http method * added boilerplate header * adding vultr to builder_all * change to builder_all * fixing headers on builder_all * vultr manager test * vultr cloudprovider test * remaining tests * docs * readme updates * ran verify-golint.sh
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| //go:build vultr | ||
| // +build vultr | ||
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| /* | ||
| Copyright 2018 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
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| package builder | ||
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| import ( | ||
| "k8s.io/autoscaler/cluster-autoscaler/cloudprovider" | ||
| "k8s.io/autoscaler/cluster-autoscaler/config" | ||
| ) | ||
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| // AvailableCloudProviders supported by the cloud provider builder. | ||
| var AvailableCloudProviders = []string{ | ||
| cloudprovider.VultrProviderName, | ||
| } | ||
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| // DefaultCloudProvider for linode-only build is linode. | ||
| const DefaultCloudProvider = cloudprovider.VultrProviderName | ||
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| func buildCloudProvider(opts config.AutoscalingOptions, do cloudprovider.NodeGroupDiscoveryOptions, rl *cloudprovider.ResourceLimiter) cloudprovider.CloudProvider { | ||
| switch opts.CloudProviderName { | ||
| case cloudprovider.VultrProviderName: | ||
| return vultr.BuildLinode(opts, do, rl) | ||
| } | ||
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| return nil | ||
| } |
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| # Cluster Autoscaler for Vultr | ||
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| The cluster autoscaler for Vultr scales nodes in a VKE cluster. | ||
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| ## Vultr Kubernetes Engine | ||
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| Vultr Kubernetes Engine ([VKE](https://www.vultr.com/docs/vultr-kubernetes-engine/)) is the managed kubernetes solution provided by Vultr. | ||
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| VKE lets users create Node Pools, i.e. groups of nodes each of the same type. | ||
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| The size of a Node Pool can be configured at any moment. The user cannot select specific nodes to be deleted when downsizing a Node Pool, rather, VKE will randomly select nodes to be deleted to reach the defined size, even if a node is not healthy or has been manually deleted. | ||
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| Nodes in a Node Pool are considered disposable: they can be deleted and recreated at any moment, deleting a single node outside of VKE will be recreated by Vultr after a small amount of time. | ||
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| ## Configuration | ||
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| It is mandatory to define the cloud configuration file `cloud-config`. You can see an example of the cloud config file at [examples/cluster-autoscaler-secret.yaml](examples/cluster-autoscaler-secret.yaml), it is an INI file with the following fields: | ||
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| The (JSON) configuration file of the Vultr cloud provider supports the following values: | ||
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| - `cluster_id`: the ID of the VKE cluster. | ||
| - `token`: the Vultr API key literally defined. | ||
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| Configuring the autoscaler such as if it should be monitoring node pools or what the minimum and maximum values. Should be configured through the [Vultr API](https://www.vultr.com/api/#tag/kubernetes). | ||
| The autoscaler will pick up any changes and adjust accordingly. | ||
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| ## Development | ||
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| Make sure you are inside the `cluster-autoscaler` path of the [autoscaler repository](https://github.com/kubernetes/autoscaler). | ||
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| Create the docker image: | ||
| ``` | ||
| make container | ||
| ``` | ||
| tag the generated docker image and push it to a registry. |
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167
cluster-autoscaler/cloudprovider/vultr/examples/cluster-autoscaler-deployment.yaml
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| --- | ||
| apiVersion: v1 | ||
| kind: ServiceAccount | ||
| metadata: | ||
| labels: | ||
| k8s-addon: cluster-autoscaler.addons.k8s.io | ||
| k8s-app: cluster-autoscaler | ||
| name: cluster-autoscaler | ||
| namespace: kube-system | ||
| --- | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| kind: ClusterRole | ||
| metadata: | ||
| name: cluster-autoscaler | ||
| labels: | ||
| k8s-addon: cluster-autoscaler.addons.k8s.io | ||
| k8s-app: cluster-autoscaler | ||
| rules: | ||
| - apiGroups: [""] | ||
| resources: ["events", "endpoints"] | ||
| verbs: ["create", "patch"] | ||
| - apiGroups: [""] | ||
| resources: ["pods/eviction"] | ||
| verbs: ["create"] | ||
| - apiGroups: [""] | ||
| resources: ["pods/status"] | ||
| verbs: ["update"] | ||
| - apiGroups: [""] | ||
| resources: ["endpoints"] | ||
| resourceNames: ["cluster-autoscaler"] | ||
| verbs: ["get", "update"] | ||
| - apiGroups: [""] | ||
| resources: ["nodes"] | ||
| verbs: ["watch", "list", "get", "update"] | ||
| - apiGroups: [""] | ||
| resources: | ||
| - "namespaces" | ||
| - "pods" | ||
| - "services" | ||
| - "replicationcontrollers" | ||
| - "persistentvolumeclaims" | ||
| - "persistentvolumes" | ||
| verbs: ["watch", "list", "get"] | ||
| - apiGroups: ["extensions"] | ||
| resources: ["replicasets", "daemonsets"] | ||
| verbs: ["watch", "list", "get"] | ||
| - apiGroups: ["policy"] | ||
| resources: ["poddisruptionbudgets"] | ||
| verbs: ["watch", "list"] | ||
| - apiGroups: ["apps"] | ||
| resources: ["statefulsets", "replicasets", "daemonsets"] | ||
| verbs: ["watch", "list", "get"] | ||
| - apiGroups: ["storage.k8s.io"] | ||
| resources: ["storageclasses", "csinodes", "csistoragecapacities", "csidrivers"] | ||
| verbs: ["watch", "list", "get"] | ||
| - apiGroups: ["batch", "extensions"] | ||
| resources: ["jobs"] | ||
| verbs: ["get", "list", "watch", "patch"] | ||
| - apiGroups: ["coordination.k8s.io"] | ||
| resources: ["leases"] | ||
| verbs: ["create"] | ||
| - apiGroups: ["coordination.k8s.io"] | ||
| resourceNames: ["cluster-autoscaler"] | ||
| resources: ["leases"] | ||
| verbs: ["get", "update"] | ||
| --- | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| kind: Role | ||
| metadata: | ||
| name: cluster-autoscaler | ||
| namespace: kube-system | ||
| labels: | ||
| k8s-addon: cluster-autoscaler.addons.k8s.io | ||
| k8s-app: cluster-autoscaler | ||
| rules: | ||
| - apiGroups: [""] | ||
| resources: ["configmaps"] | ||
| verbs: ["create","list","watch"] | ||
| - apiGroups: [""] | ||
| resources: ["configmaps"] | ||
| resourceNames: ["cluster-autoscaler-status", "cluster-autoscaler-priority-expander"] | ||
| verbs: ["delete", "get", "update", "watch"] | ||
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| --- | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| kind: ClusterRoleBinding | ||
| metadata: | ||
| name: cluster-autoscaler | ||
| labels: | ||
| k8s-addon: cluster-autoscaler.addons.k8s.io | ||
| k8s-app: cluster-autoscaler | ||
| roleRef: | ||
| apiGroup: rbac.authorization.k8s.io | ||
| kind: ClusterRole | ||
| name: cluster-autoscaler | ||
| subjects: | ||
| - kind: ServiceAccount | ||
| name: cluster-autoscaler | ||
| namespace: kube-system | ||
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| --- | ||
| apiVersion: rbac.authorization.k8s.io/v1 | ||
| kind: RoleBinding | ||
| metadata: | ||
| name: cluster-autoscaler | ||
| namespace: kube-system | ||
| labels: | ||
| k8s-addon: cluster-autoscaler.addons.k8s.io | ||
| k8s-app: cluster-autoscaler | ||
| roleRef: | ||
| apiGroup: rbac.authorization.k8s.io | ||
| kind: Role | ||
| name: cluster-autoscaler | ||
| subjects: | ||
| - kind: ServiceAccount | ||
| name: cluster-autoscaler | ||
| namespace: kube-system | ||
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| --- | ||
| apiVersion: apps/v1 | ||
| kind: Deployment | ||
| metadata: | ||
| name: cluster-autoscaler | ||
| namespace: kube-system | ||
| labels: | ||
| app: cluster-autoscaler | ||
| spec: | ||
| replicas: 1 | ||
| selector: | ||
| matchLabels: | ||
| app: cluster-autoscaler | ||
| template: | ||
| metadata: | ||
| labels: | ||
| app: cluster-autoscaler | ||
| spec: | ||
| serviceAccountName: cluster-autoscaler | ||
| containers: | ||
| - image: k8s.gcr.io/autoscaling/cluster-autoscaler:latest | ||
| name: cluster-autoscaler | ||
| resources: | ||
| limits: | ||
| cpu: 100m | ||
| memory: 300Mi | ||
| requests: | ||
| cpu: 100m | ||
| memory: 300Mi | ||
| command: | ||
| - ./cluster-autoscaler | ||
| - --v=2 | ||
| - --cloud-provider=vultr | ||
| - --cloud-config=/config/cloud-config | ||
| volumeMounts: | ||
| - name: ssl-certs | ||
| mountPath: /etc/ssl/certs/ca-certificates.crt | ||
| readOnly: true | ||
| - name: cloud-config | ||
| mountPath: /config | ||
| readOnly: true | ||
| imagePullPolicy: "Always" | ||
| volumes: | ||
| - name: ssl-certs | ||
| hostPath: | ||
| path: "/etc/ssl/certs/ca-certificates.crt" | ||
| - name: cloud-config | ||
| secret: | ||
| secretName: cluster-autoscaler-cloud-config |
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13
cluster-autoscaler/cloudprovider/vultr/examples/cluster-autoscaler-secret.yaml
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| --- | ||
| apiVersion: v1 | ||
| kind: Secret | ||
| metadata: | ||
| name: cluster-autoscaler-cloud-config | ||
| namespace: kube-system | ||
| type: Opaque | ||
| stringData: | ||
| cloud-config: |- | ||
| { | ||
| "cluster_id": "6b8b7c8e-7314-4d17-bb0c-fcc9777230fa", | ||
| "token": "IAOBTDG35OTGH2UKCC3S6CNMDUPCN3ZNVBASQ" | ||
| } |
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