├── .gitignore ├── Dockerfile ├── Makefile ├── README.md ├── cmd └── server │ └── app.go ├── deploy └── helm │ └── cola │ ├── .helmignore │ ├── Chart.yaml │ ├── templates │ ├── _helpers.tpl │ ├── cluster-role-binding.yaml │ ├── daemonset.yaml │ └── serviceaccount.yaml │ └── values.yaml ├── e2e └── pod-with-cola.yaml ├── go.mod ├── go.sum └── pkg └── server ├── server.go └── utils.go /.gitignore: -------------------------------------------------------------------------------- 1 | build -------------------------------------------------------------------------------- /Dockerfile: -------------------------------------------------------------------------------- 1 | FROM alpine:latest 2 | MAINTAINER jiangpengfei 3 | 4 | COPY ./build/cola /root/cola 5 | 6 | CMD ["/root/cola"] 7 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | IMAGE_VERSION = latest 2 | REGISTRY = docker.io/joyme 3 | IMAGE = ${REGISTRY}/cola-device-plugin:${IMAGE_VERSION} 4 | 5 | .PHONY: build deploy 6 | 7 | build: 8 | CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o build/cola cmd/server/app.go 9 | 10 | buildImage: 11 | docker build -t ${IMAGE} . 12 | 13 | kindLoad: 14 | kind load docker-image ${IMAGE} 15 | 16 | pushImage: 17 | docker push ${IMAGE} 18 | 19 | deploy: 20 | helm install cola deploy/helm/cola 21 | 22 | upgrade: 23 | helm upgrade cola deploy/helm/cola 24 | 25 | dry-run: 26 | helm install cola deploy/helm/cola --dry-run -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ## cola device plugin 2 | 3 | kubernetes device plugin 的开发示例。 4 | 5 | ## 编译 6 | 7 | ```shell 8 | make build 9 | ``` 10 | 11 | ## 部署 12 | 13 | ```shell 14 | make deploy 15 | ``` 16 | 17 | ## 测试 18 | 19 | 在节点上 `/etc/colas` 文件夹下创建文件代表我们的 `myway5.cmo/cola` 资源。比如: 20 | 21 | ```shell 22 | $ touch cocacola 23 | $ touch peisicola 24 | ``` 25 | 26 | 为节点添加 label 27 | 28 | ```shell 29 | $ kubectl label nodes test cola-device=enable 30 | ``` 31 | 32 | ```shell 33 | kubectl apply -f e2e/pod-with-cola.yaml 34 | ``` 35 | 36 | 然后查看 pod 的调度情况或者查看 pod 日志来检查 -------------------------------------------------------------------------------- /cmd/server/app.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "os" 5 | "path/filepath" 6 | "time" 7 | 8 | "github.com/joyme123/cola-device-plugin/pkg/server" 9 | log "github.com/sirupsen/logrus" 10 | "gopkg.in/fsnotify.v1" 11 | ) 12 | 13 | func main() { 14 | log.Info("cola device plugin starting") 15 | colaSrv := server.NewColaServer() 16 | go colaSrv.Run() 17 | 18 | // 向 kubelet 注册 19 | if err := colaSrv.RegisterToKubelet(); err != nil { 20 | log.Fatalf("register to kubelet error: %v", err) 21 | } else { 22 | log.Infoln("register to kubelet successfully") 23 | } 24 | 25 | // 监听 kubelet.sock，一旦创建则重启 26 | devicePluginSocket := filepath.Join(server.DevicePluginPath, server.KubeletSocket) 27 | log.Info("device plugin socket name:", devicePluginSocket) 28 | watcher, err := fsnotify.NewWatcher() 29 | if err != nil { 30 | log.Error("Failed to created FS watcher.") 31 | os.Exit(1) 32 | } 33 | defer watcher.Close() 34 | err = watcher.Add(server.DevicePluginPath) 35 | if err != nil { 36 | log.Error("watch kubelet error") 37 | return 38 | } 39 | log.Info("watching kubelet.sock") 40 | for { 41 | select { 42 | case event := <-watcher.Events: 43 | log.Infof("watch kubelet events: %s, event name: %s, isCreate: %v", event.Op.String(), event.Name, event.Op&fsnotify.Create == fsnotify.Create) 44 | if event.Name == devicePluginSocket && event.Op&fsnotify.Create == fsnotify.Create { 45 | time.Sleep(time.Second) 46 | log.Fatalf("inotify: %s created, restarting.", devicePluginSocket) 47 | } 48 | case err := <-watcher.Errors: 49 | log.Fatalf("inotify: %s", err) 50 | } 51 | } 52 | } 53 | -------------------------------------------------------------------------------- /deploy/helm/cola/.helmignore: -------------------------------------------------------------------------------- 1 | # Patterns to ignore when building packages. 2 | # This supports shell glob matching, relative path matching, and 3 | # negation (prefixed with !). Only one pattern per line. 4 | .DS_Store 5 | # Common VCS dirs 6 | .git/ 7 | .gitignore 8 | .bzr/ 9 | .bzrignore 10 | .hg/ 11 | .hgignore 12 | .svn/ 13 | # Common backup files 14 | *.swp 15 | *.bak 16 | *.tmp 17 | *~ 18 | # Various IDEs 19 | .project 20 | .idea/ 21 | *.tmproj 22 | .vscode/ 23 | -------------------------------------------------------------------------------- /deploy/helm/cola/Chart.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v2 2 | name: cola 3 | description: A Helm chart for Kubernetes 4 | 5 | # A chart can be either an 'application' or a 'library' chart. 6 | # 7 | # Application charts are a collection of templates that can be packaged into versioned archives 8 | # to be deployed. 9 | # 10 | # Library charts provide useful utilities or functions for the chart developer. They're included as 11 | # a dependency of application charts to inject those utilities and functions into the rendering 12 | # pipeline. Library charts do not define any templates and therefore cannot be deployed. 13 | type: application 14 | 15 | # This is the chart version. This version number should be incremented each time you make changes 16 | # to the chart and its templates, including the app version. 17 | version: 0.1.0 18 | 19 | # This is the version number of the application being deployed. This version number should be 20 | # incremented each time you make changes to the application. 21 | appVersion: latest 22 | -------------------------------------------------------------------------------- /deploy/helm/cola/templates/_helpers.tpl: -------------------------------------------------------------------------------- 1 | {{/* vim: set filetype=mustache: */}} 2 | {{/* 3 | Expand the name of the chart. 4 | */}} 5 | {{- define "cola.name" -}} 6 | {{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" -}} 7 | {{- end -}} 8 | 9 | {{/* 10 | Create a default fully qualified app name. 11 | We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec). 12 | If release name contains chart name it will be used as a full name. 13 | */}} 14 | {{- define "cola.fullname" -}} 15 | {{- if .Values.fullnameOverride -}} 16 | {{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" -}} 17 | {{- else -}} 18 | {{- $name := default .Chart.Name .Values.nameOverride -}} 19 | {{- if contains $name .Release.Name -}} 20 | {{- .Release.Name | trunc 63 | trimSuffix "-" -}} 21 | {{- else -}} 22 | {{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}} 23 | {{- end -}} 24 | {{- end -}} 25 | {{- end -}} 26 | 27 | {{/* 28 | Create chart name and version as used by the chart label. 29 | */}} 30 | {{- define "cola.chart" -}} 31 | {{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}} 32 | {{- end -}} 33 | 34 | {{/* 35 | Common labels 36 | */}} 37 | {{- define "cola.labels" -}} 38 | helm.sh/chart: {{ include "cola.chart" . }} 39 | {{ include "cola.selectorLabels" . }} 40 | {{- if .Chart.AppVersion }} 41 | app.kubernetes.io/version: {{ .Chart.AppVersion | quote }} 42 | {{- end }} 43 | app.kubernetes.io/managed-by: {{ .Release.Service }} 44 | {{- end -}} 45 | 46 | {{/* 47 | Selector labels 48 | */}} 49 | {{- define "cola.selectorLabels" -}} 50 | app.kubernetes.io/name: {{ include "cola.name" . }} 51 | app.kubernetes.io/instance: {{ .Release.Name }} 52 | {{- end -}} 53 | 54 | {{/* 55 | Create the name of the service account to use 56 | */}} 57 | {{- define "cola.serviceAccountName" -}} 58 | {{- if .Values.serviceAccount.create -}} 59 | {{ default (include "cola.fullname" .) .Values.serviceAccount.name }} 60 | {{- else -}} 61 | {{ default "default" .Values.serviceAccount.name }} 62 | {{- end -}} 63 | {{- end -}} 64 | -------------------------------------------------------------------------------- /deploy/helm/cola/templates/cluster-role-binding.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: rbac.authorization.k8s.io/v1 2 | kind: ClusterRoleBinding 3 | metadata: 4 | name: cola-admin-binding 5 | roleRef: 6 | kind: ClusterRole 7 | name: cluster-admin 8 | apiGroup: rbac.authorization.k8s.io 9 | subjects: 10 | - kind: ServiceAccount 11 | name: cola-admin 12 | namespace: {{ .Values.namespace }} -------------------------------------------------------------------------------- /deploy/helm/cola/templates/daemonset.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: apps/v1 2 | kind: DaemonSet 3 | metadata: 4 | name: {{ include "cola.fullname" . }} 5 | namespace: {{ .Values.namespace }} 6 | labels: 7 | {{- include "cola.labels" . | nindent 4 }} 8 | spec: 9 | updateStrategy: 10 | type: RollingUpdate 11 | selector: 12 | matchLabels: 13 | {{- include "cola.selectorLabels" . | nindent 6 }} 14 | template: 15 | metadata: 16 | # This annotation is deprecated. Kept here for backward compatibility 17 | # See https://kubernetes.io/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/ 18 | annotations: 19 | scheduler.alpha.kubernetes.io/critical-pod: "" 20 | labels: 21 | {{- include "cola.selectorLabels" . | nindent 8 }} 22 | spec: 23 | {{- with .Values.imagePullSecrets }} 24 | imagePullSecrets: 25 | {{- toYaml . | nindent 8 }} 26 | {{- end }} 27 | serviceAccountName: {{ include "cola.serviceAccountName" . }} 28 | securityContext: 29 | {{- toYaml .Values.podSecurityContext | nindent 8 }} 30 | containers: 31 | - name: {{ .Chart.Name }} 32 | securityContext: 33 | {{- toYaml .Values.securityContext | nindent 12 }} 34 | image: "{{ .Values.image.repository }}:{{ .Chart.AppVersion }}" 35 | imagePullPolicy: {{ .Values.image.pullPolicy }} 36 | resources: 37 | {{- toYaml .Values.resources | nindent 12 }} 38 | volumeMounts: 39 | - name: device-plugin 40 | mountPath: /var/lib/kubelet/device-plugins 41 | - name: devices 42 | mountPath: /etc/colas 43 | {{- with .Values.nodeSelector }} 44 | nodeSelector: 45 | {{- toYaml . | nindent 8 }} 46 | {{- end }} 47 | {{- with .Values.affinity }} 48 | affinity: 49 | {{- toYaml . | nindent 8 }} 50 | {{- end }} 51 | {{- with .Values.tolerations }} 52 | tolerations: 53 | {{- toYaml . | nindent 8 }} 54 | {{- end }} 55 | # Mark this pod as a critical add-on; when enabled, the critical add-on 56 | # scheduler reserves resources for critical add-on pods so that they can 57 | # be rescheduled after a failure. 58 | # See https://kubernetes.io/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/ 59 | priorityClassName: "system-node-critical" 60 | hostPID: true 61 | volumes: 62 | - name: device-plugin 63 | hostPath: 64 | type: Directory 65 | path: /var/lib/kubelet/device-plugins 66 | - name: devices 67 | hostPath: 68 | type: Directory 69 | path: /etc/colas -------------------------------------------------------------------------------- /deploy/helm/cola/templates/serviceaccount.yaml: -------------------------------------------------------------------------------- 1 | {{- if .Values.serviceAccount.create -}} 2 | apiVersion: v1 3 | kind: ServiceAccount 4 | metadata: 5 | name: {{ include "cola.serviceAccountName" . }} 6 | namespace: {{ .Values.namespace }} 7 | labels: 8 | {{ include "cola.labels" . | nindent 4 }} 9 | {{- end -}} 10 | -------------------------------------------------------------------------------- /deploy/helm/cola/values.yaml: -------------------------------------------------------------------------------- 1 | # Default values for cola. 2 | # This is a YAML-formatted file. 3 | # Declare variables to be passed into your templates. 4 | 5 | replicaCount: 1 6 | 7 | image: 8 | repository: joyme/cola-device-plugin 9 | pullPolicy: IfNotPresent 10 | 11 | imagePullSecrets: [] 12 | nameOverride: "" 13 | fullnameOverride: "" 14 | 15 | namespace: kube-system 16 | 17 | serviceAccount: 18 | # Specifies whether a service account should be created 19 | create: true 20 | # The name of the service account to use. 21 | # If not set and create is true, a name is generated using the fullname template 22 | name: cola-admin 23 | 24 | podSecurityContext: {} 25 | # fsGroup: 2000 26 | 27 | securityContext: {} 28 | # capabilities: 29 | # drop: 30 | # - ALL 31 | # readOnlyRootFilesystem: true 32 | # runAsNonRoot: true 33 | # runAsUser: 1000 34 | 35 | resources: {} 36 | # We usually recommend not to specify default resources and to leave this as a conscious 37 | # choice for the user. This also increases chances charts run on environments with little 38 | # resources, such as Minikube. If you do want to specify resources, uncomment the following 39 | # lines, adjust them as necessary, and remove the curly braces after 'resources:'. 40 | # limits: 41 | # cpu: 100m 42 | # memory: 128Mi 43 | # requests: 44 | # cpu: 100m 45 | # memory: 128Mi 46 | 47 | nodeSelector: { 48 | cola-device: enable 49 | } 50 | 51 | tolerations: 52 | - key: CriticalAddonsOnly 53 | operator: Exists 54 | - key: myway5.com/cola 55 | operator: Exists 56 | effect: NoSchedule 57 | 58 | affinity: {} 59 | -------------------------------------------------------------------------------- /e2e/pod-with-cola.yaml: -------------------------------------------------------------------------------- 1 | apiVersion: v1 2 | kind: Pod 3 | metadata: 4 | name: cola-pod 5 | labels: 6 | name: cola-pod 7 | spec: 8 | containers: 9 | - name: cola-pod 10 | image: nginx:1.14.2 11 | resources: 12 | requests: 13 | memory: "128Mi" 14 | cpu: "500m" 15 | myway5.com/cola: 1 16 | limits: 17 | memory: "128Mi" 18 | cpu: "500m" 19 | myway5.com/cola: 1 20 | ports: 21 | - containerPort: 80 22 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/joyme123/cola-device-plugin 2 | 3 | go 1.13 4 | 5 | replace ( 6 | k8s.io/api => k8s.io/api v0.0.0-20190620084959-7cf5895f2711 7 | k8s.io/apiextensions-apiserver => k8s.io/apiextensions-apiserver v0.0.0-20190620085554-14e95df34f1f 8 | k8s.io/apimachinery => k8s.io/apimachinery v0.0.0-20190612205821-1799e75a0719 9 | k8s.io/apiserver => k8s.io/apiserver v0.0.0-20190620085212-47dc9a115b18 10 | k8s.io/cli-runtime => k8s.io/cli-runtime v0.0.0-20190620085706-2090e6d8f84c 11 | k8s.io/client-go => k8s.io/client-go v0.0.0-20190620085101-78d2af792bab 12 | k8s.io/cloud-provider => k8s.io/cloud-provider v0.0.0-20190620090043-8301c0bda1f0 13 | k8s.io/cluster-bootstrap => k8s.io/cluster-bootstrap v0.0.0-20190620090013-c9a0fc045dc1 14 | k8s.io/code-generator => k8s.io/code-generator v0.0.0-20190612205613-18da4a14b22b 15 | k8s.io/component-base => k8s.io/component-base v0.0.0-20190620085130-185d68e6e6ea 16 | k8s.io/cri-api => k8s.io/cri-api v0.0.0-20190531030430-6117653b35f1 17 | k8s.io/csi-translation-lib => k8s.io/csi-translation-lib v0.0.0-20190620090116-299a7b270edc 18 | k8s.io/kube-aggregator => k8s.io/kube-aggregator v0.0.0-20190620085325-f29e2b4a4f84 19 | k8s.io/kube-controller-manager => k8s.io/kube-controller-manager v0.0.0-20190620085942-b7f18460b210 20 | k8s.io/kube-proxy => k8s.io/kube-proxy v0.0.0-20190620085809-589f994ddf7f 21 | k8s.io/kube-scheduler => k8s.io/kube-scheduler v0.0.0-20190620085912-4acac5405ec6 22 | k8s.io/kubelet => k8s.io/kubelet v0.0.0-20190620085838-f1cb295a73c9 23 | k8s.io/legacy-cloud-providers => k8s.io/legacy-cloud-providers v0.0.0-20190620090156-2138f2c9de18 24 | k8s.io/metrics => k8s.io/metrics v0.0.0-20190620085625-3b22d835f165 25 | k8s.io/sample-apiserver => k8s.io/sample-apiserver v0.0.0-20190620085408-1aef9010884e 26 | ) 27 | 28 | require ( 29 | github.com/fsnotify/fsnotify v1.4.7 30 | github.com/golang/protobuf v1.3.5 // indirect 31 | github.com/sirupsen/logrus v1.2.0 32 | google.golang.org/grpc v1.28.0 33 | gopkg.in/fsnotify.v1 v1.4.7 34 | k8s.io/kubernetes v1.15.5 35 | ) 36 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | bitbucket.org/bertimus9/systemstat v0.0.0-20180207000608-0eeff89b0690/go.mod h1:Ulb78X89vxKYgdL24HMTiXYHlyHEvruOj1ZPlqeNEZM= 2 | cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 3 | cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= 4 | github.com/Azure/azure-sdk-for-go v21.4.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc= 5 | github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8= 6 | github.com/Azure/go-autorest v11.1.2+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24= 7 | github.com/BurntSushi/toml v0.3.0/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= 8 | github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= 9 | github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo= 10 | github.com/GoogleCloudPlatform/k8s-cloud-provider v0.0.0-20181220005116-f8e995905100/go.mod h1:iroGtC8B3tQiqtds1l+mgk/BBOrxbqjH+eUfFQYRc14= 11 | github.com/JeffAshton/win_pdh v0.0.0-20161109143554-76bb4ee9f0ab/go.mod h1:3VYc5hodBMJ5+l/7J4xAyMeuM2PNuepvHlGs8yilUCA= 12 | github.com/MakeNowJust/heredoc v0.0.0-20170808103936-bb23615498cd/go.mod h1:64YHyfSL2R96J44Nlwm39UHepQbyR5q10x7iYa1ks2E= 13 | github.com/Microsoft/go-winio v0.4.11/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA= 14 | github.com/Microsoft/hcsshim 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h1:UXU55LeVTrjyQNw86sHjagiYhSZjYxWKXvx0Ml17KvM= 329 | k8s.io/cluster-bootstrap v0.0.0-20190620090013-c9a0fc045dc1/go.mod h1:cCRw3eZzlJdySYRtkL/N4cAClxYCzyrBL3V8cblTlUo= 330 | k8s.io/code-generator v0.0.0-20190612205613-18da4a14b22b/go.mod h1:G8bQwmHm2eafm5bgtX67XDZQ8CWKSGu9DekI+yN4Y5I= 331 | k8s.io/component-base v0.0.0-20190620085130-185d68e6e6ea/go.mod h1:VLedAFwENz2swOjm0zmUXpAP2mV55c49xgaOzPBI/QQ= 332 | k8s.io/cri-api v0.0.0-20190531030430-6117653b35f1/go.mod h1:K6Ux7uDbzKhacgqW0OJg3rjXk/SR9kprCPfSUDXGB5A= 333 | k8s.io/csi-translation-lib v0.0.0-20190620090116-299a7b270edc/go.mod h1:L51Xd2IwQCsOBx41c4YZR9dY1h1IjMk8r3Nnv3L80KM= 334 | k8s.io/gengo v0.0.0-20190116091435-f8a0810f38af/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0= 335 | k8s.io/heapster v1.2.0-beta.1/go.mod h1:h1uhptVXMwC8xtZBYsPXKVi8fpdlYkTs6k949KozGrM= 336 | k8s.io/klog v0.3.1 h1:RVgyDHY/kFKtLqh67NvEWIgkMneNoIrdkN0CxDSQc68= 337 | k8s.io/klog v0.3.1/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk= 338 | k8s.io/klog v1.0.0 h1:Pt+yjF5aB1xDSVbau4VsWe+dQNzA0qv1LlXdC2dF6Q8= 339 | k8s.io/kube-aggregator v0.0.0-20190620085325-f29e2b4a4f84/go.mod h1:S8URgD5o6oGCoLP9lx6oAdxWB9Ovtq9KLU9cYmU08QI= 340 | k8s.io/kube-controller-manager v0.0.0-20190620085942-b7f18460b210/go.mod h1:FoQCodL0eAmdwbZuu2/fi7nVEh3xE4SpomwLaGO4V74= 341 | k8s.io/kube-openapi v0.0.0-20190228160746-b3a7cee44a30/go.mod h1:BXM9ceUBTj2QnfH2MK1odQs778ajze1RxcmP6S8RVVc= 342 | k8s.io/kube-proxy v0.0.0-20190620085809-589f994ddf7f/go.mod h1:EP2frUhhC4rizGpCTYCnVS4+XZMh7Hyq40jOUvuAK5g= 343 | k8s.io/kube-scheduler v0.0.0-20190620085912-4acac5405ec6/go.mod h1:ktfBNqjRdtYUw2eFNk32TtxiGqOy00eiWua74iNEcLg= 344 | k8s.io/kubelet v0.0.0-20190620085838-f1cb295a73c9/go.mod h1:2gRsvblRTyHIsBazBlnqeAWkWRtnUq6cBnrfdPFr9iY= 345 | k8s.io/kubernetes v1.15.5 h1:joGHGmNjm75F8LkJmflKxaYTHWNwodNp+aN/uAgCNp0= 346 | k8s.io/kubernetes v1.15.5/go.mod h1:Kyu5t/D1Dx5GSj78bquQyN20G5xKZ9BYrtFT4fA9kXU= 347 | k8s.io/legacy-cloud-providers v0.0.0-20190620090156-2138f2c9de18/go.mod h1:cgNZX1LyZbr0mW8MxxlgvFU2D3k1KDTlH/EgMuiQbGc= 348 | k8s.io/metrics v0.0.0-20190620085625-3b22d835f165/go.mod h1:98M2pmJXrzr0W4o9N5ptSvZMygAMRVvyPr2vq7aRwT4= 349 | k8s.io/repo-infra v0.0.0-20181204233714-00fe14e3d1a3/go.mod h1:+G1xBfZDfVFsm1Tj/HNCvg4QqWx8rJ2Fxpqr1rqp/gQ= 350 | k8s.io/sample-apiserver v0.0.0-20190620085408-1aef9010884e/go.mod h1:uGtJFD6/KTth+Ed9NNWF8lMf5m1ued/X6qUuACRrBTs= 351 | k8s.io/utils v0.0.0-20190221042446-c2654d5206da/go.mod h1:8k8uAuAQ0rXslZKaEWd0c3oVhZz7sSzSiPnVZayjIX0= 352 | modernc.org/cc v1.0.0/go.mod h1:1Sk4//wdnYJiUIxnW8ddKpaOJCF37yAdqYnkxUpaYxw= 353 | modernc.org/golex v1.0.0/go.mod h1:b/QX9oBD/LhixY6NDh+IdGv17hgB+51fET1i2kPSmvk= 354 | modernc.org/mathutil v1.0.0/go.mod h1:wU0vUrJsVWBZ4P6e7xtFJEhFSNsfRLJ8H458uRjg03k= 355 | modernc.org/strutil v1.0.0/go.mod h1:lstksw84oURvj9y3tn8lGvRxyRC1S2+g5uuIzNfIOBs= 356 | modernc.org/xc v1.0.0/go.mod h1:mRNCo0bvLjGhHO9WsyuKVU4q0ceiDDDoEeWDJHrNx8I= 357 | sigs.k8s.io/kustomize v2.0.3+incompatible/go.mod h1:MkjgH3RdOWrievjo6c9T245dYlB5QeXV4WCbnt/PEpU= 358 | sigs.k8s.io/structured-merge-diff v0.0.0-20190302045857-e85c7b244fd2/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI= 359 | sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= 360 | vbom.ml/util v0.0.0-20160121211510-db5cfe13f5cc/go.mod h1:so/NYdZXCz+E3ZpW0uAoCj6uzU2+8OWDFv/HxUSs7kI= 361 | -------------------------------------------------------------------------------- /pkg/server/server.go: -------------------------------------------------------------------------------- 1 | package server 2 | 3 | import ( 4 | "context" 5 | "crypto/md5" 6 | "fmt" 7 | "io/ioutil" 8 | "net" 9 | "os" 10 | "path" 11 | "path/filepath" 12 | "strings" 13 | "syscall" 14 | "time" 15 | 16 | "github.com/fsnotify/fsnotify" 17 | log "github.com/sirupsen/logrus" 18 | "google.golang.org/grpc" 19 | pluginapi "k8s.io/kubernetes/pkg/kubelet/apis/deviceplugin/v1beta1" 20 | ) 21 | 22 | const ( 23 | resourceName string = "myway5.com/cola" 24 | defaultColaLocation string = "/etc/colas" 25 | colaSocket string = "cola.sock" 26 | // KubeletSocket kubelet 监听 unix 的名称 27 | KubeletSocket string = "kubelet.sock" 28 | // DevicePluginPath 默认位置 29 | DevicePluginPath string = "/var/lib/kubelet/device-plugins/" 30 | ) 31 | 32 | // ColaServer 是一个 device plugin server 33 | type ColaServer struct { 34 | srv *grpc.Server 35 | devices map[string]*pluginapi.Device 36 | notify chan bool 37 | ctx context.Context 38 | cancel context.CancelFunc 39 | restartFlag bool // 本次是否是重启 40 | } 41 | 42 | // NewColaServer 实例化 colaServer 43 | func NewColaServer() *ColaServer { 44 | ctx, cancel := context.WithCancel(context.Background()) 45 | return &ColaServer{ 46 | devices: make(map[string]*pluginapi.Device), 47 | srv: grpc.NewServer(grpc.EmptyServerOption{}), 48 | notify: make(chan bool), 49 | ctx: ctx, 50 | cancel: cancel, 51 | restartFlag: false, 52 | } 53 | } 54 | 55 | // Run 运行服务 56 | func (s *ColaServer) Run() error { 57 | // 发现本地设备 58 | err := s.listDevice() 59 | if err != nil { 60 | log.Fatalf("list device error: %v", err) 61 | } 62 | 63 | go func() { 64 | err := s.watchDevice() 65 | if err != nil { 66 | log.Println("watch devices error") 67 | } 68 | }() 69 | 70 | pluginapi.RegisterDevicePluginServer(s.srv, s) 71 | err = syscall.Unlink(DevicePluginPath + colaSocket) 72 | if err != nil && !os.IsNotExist(err) { 73 | return err 74 | } 75 | 76 | l, err := net.Listen("unix", DevicePluginPath+colaSocket) 77 | if err != nil { 78 | return err 79 | } 80 | 81 | go func() { 82 | lastCrashTime := time.Now() 83 | restartCount := 0 84 | for { 85 | log.Printf("start GPPC server for '%s'", resourceName) 86 | err = s.srv.Serve(l) 87 | if err == nil { 88 | break 89 | } 90 | 91 | log.Printf("GRPC server for '%s' crashed with error: $v", resourceName, err) 92 | 93 | if restartCount > 5 { 94 | log.Fatal("GRPC server for '%s' has repeatedly crashed recently. Quitting", resourceName) 95 | } 96 | timeSinceLastCrash := time.Since(lastCrashTime).Seconds() 97 | lastCrashTime = time.Now() 98 | if timeSinceLastCrash > 3600 { 99 | restartCount = 1 100 | } else { 101 | restartCount++ 102 | } 103 | } 104 | }() 105 | 106 | // Wait for server to start by lauching a blocking connection 107 | conn, err := s.dial(colaSocket, 5*time.Second) 108 | if err != nil { 109 | return err 110 | } 111 | conn.Close() 112 | 113 | return nil 114 | } 115 | 116 | // RegisterToKubelet 向kubelet注册device plugin 117 | func (s *ColaServer) RegisterToKubelet() error { 118 | socketFile := filepath.Join(DevicePluginPath + KubeletSocket) 119 | 120 | conn, err := s.dial(socketFile, 5*time.Second) 121 | if err != nil { 122 | return err 123 | } 124 | defer conn.Close() 125 | 126 | client := pluginapi.NewRegistrationClient(conn) 127 | req := &pluginapi.RegisterRequest{ 128 | Version: pluginapi.Version, 129 | Endpoint: path.Base(DevicePluginPath + colaSocket), 130 | ResourceName: resourceName, 131 | } 132 | log.Infof("Register to kubelet with endpoint %s", req.Endpoint) 133 | _, err = client.Register(context.Background(), req) 134 | if err != nil { 135 | return err 136 | } 137 | 138 | return nil 139 | } 140 | 141 | // GetDevicePluginOptions returns options to be communicated with Device 142 | // Manager 143 | func (s *ColaServer) GetDevicePluginOptions(ctx context.Context, e *pluginapi.Empty) (*pluginapi.DevicePluginOptions, error) { 144 | log.Infoln("GetDevicePluginOptions called") 145 | return &pluginapi.DevicePluginOptions{PreStartRequired: true}, nil 146 | } 147 | 148 | // ListAndWatch returns a stream of List of Devices 149 | // Whenever a Device state change or a Device disappears, ListAndWatch 150 | // returns the new list 151 | func (s *ColaServer) ListAndWatch(e *pluginapi.Empty, srv pluginapi.DevicePlugin_ListAndWatchServer) error { 152 | log.Infoln("ListAndWatch called") 153 | devs := make([]*pluginapi.Device, len(s.devices)) 154 | 155 | i := 0 156 | for _, dev := range s.devices { 157 | devs[i] = dev 158 | i++ 159 | } 160 | 161 | err := srv.Send(&pluginapi.ListAndWatchResponse{Devices: devs}) 162 | if err != nil { 163 | log.Errorf("ListAndWatch send device error: %v", err) 164 | return err 165 | } 166 | 167 | // 更新 device list 168 | for { 169 | log.Infoln("waiting for device change") 170 | select { 171 | case <-s.notify: 172 | log.Infoln("开始更新device list, 设备数:", len(s.devices)) 173 | devs := make([]*pluginapi.Device, len(s.devices)) 174 | 175 | i := 0 176 | for _, dev := range s.devices { 177 | devs[i] = dev 178 | i++ 179 | } 180 | 181 | srv.Send(&pluginapi.ListAndWatchResponse{Devices: devs}) 182 | 183 | case <-s.ctx.Done(): 184 | log.Info("ListAndWatch exit") 185 | return nil 186 | } 187 | } 188 | } 189 | 190 | // Allocate is called during container creation so that the Device 191 | // Plugin can run device specific operations and instruct Kubelet 192 | // of the steps to make the Device available in the container 193 | func (s *ColaServer) Allocate(ctx context.Context, reqs *pluginapi.AllocateRequest) (*pluginapi.AllocateResponse, error) { 194 | log.Infoln("Allocate called") 195 | resps := &pluginapi.AllocateResponse{} 196 | for _, req := range reqs.ContainerRequests { 197 | log.Infof("received request: %v", strings.Join(req.DevicesIDs, ",")) 198 | resp := pluginapi.ContainerAllocateResponse{ 199 | Envs: map[string]string{ 200 | "COLA_DEVICES": strings.Join(req.DevicesIDs, ","), 201 | }, 202 | } 203 | resps.ContainerResponses = append(resps.ContainerResponses, &resp) 204 | } 205 | return resps, nil 206 | } 207 | 208 | // PreStartContainer is called, if indicated by Device Plugin during registeration phase, 209 | // before each container start. Device plugin can run device specific operations 210 | // such as reseting the device before making devices available to the container 211 | func (s *ColaServer) PreStartContainer(ctx context.Context, req *pluginapi.PreStartContainerRequest) (*pluginapi.PreStartContainerResponse, error) { 212 | log.Infoln("PreStartContainer called") 213 | return &pluginapi.PreStartContainerResponse{}, nil 214 | } 215 | 216 | // listDevice 从节点上发现设备 217 | func (s *ColaServer) listDevice() error { 218 | dir, err := ioutil.ReadDir(defaultColaLocation) 219 | if err != nil { 220 | return err 221 | } 222 | 223 | for _, f := range dir { 224 | if f.IsDir() { 225 | continue 226 | } 227 | 228 | sum := md5.Sum([]byte(f.Name())) 229 | s.devices[f.Name()] = &pluginapi.Device{ 230 | ID: string(sum[:]), 231 | Health: pluginapi.Healthy, 232 | } 233 | log.Infof("find device '%s'", f.Name()) 234 | } 235 | 236 | return nil 237 | } 238 | 239 | func (s *ColaServer) watchDevice() error { 240 | log.Infoln("watching devices") 241 | w, err := fsnotify.NewWatcher() 242 | if err != nil { 243 | return fmt.Errorf("NewWatcher error:%v", err) 244 | } 245 | defer w.Close() 246 | 247 | done := make(chan bool) 248 | go func() { 249 | defer func() { 250 | done <- true 251 | log.Info("watch device exit") 252 | }() 253 | for { 254 | select { 255 | case event, ok := <-w.Events: 256 | if !ok { 257 | continue 258 | } 259 | log.Infoln("device event:", event.Op.String()) 260 | 261 | if event.Op&fsnotify.Create == fsnotify.Create { 262 | // 创建文件，增加 device 263 | sum := md5.Sum([]byte(event.Name)) 264 | s.devices[event.Name] = &pluginapi.Device{ 265 | ID: string(sum[:]), 266 | Health: pluginapi.Healthy, 267 | } 268 | s.notify <- true 269 | log.Infoln("new device find:", event.Name) 270 | } else if event.Op&fsnotify.Remove == fsnotify.Remove { 271 | // 删除文件，删除 device 272 | delete(s.devices, event.Name) 273 | s.notify <- true 274 | log.Infoln("device deleted:", event.Name) 275 | } 276 | 277 | case err, ok := <-w.Errors: 278 | if !ok { 279 | return 280 | } 281 | log.Println("error:", err) 282 | 283 | case <-s.ctx.Done(): 284 | break 285 | } 286 | } 287 | }() 288 | 289 | err = w.Add(defaultColaLocation) 290 | if err != nil { 291 | return fmt.Errorf("watch device error:%v", err) 292 | } 293 | <-done 294 | 295 | return nil 296 | } 297 | 298 | func (s *ColaServer) dial(unixSocketPath string, timeout time.Duration) (*grpc.ClientConn, error) { 299 | c, err := grpc.Dial(unixSocketPath, grpc.WithInsecure(), grpc.WithBlock(), 300 | grpc.WithTimeout(timeout), 301 | grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) { 302 | return net.DialTimeout("unix", addr, timeout) 303 | }), 304 | ) 305 | 306 | if err != nil { 307 | return nil, err 308 | } 309 | 310 | return c, nil 311 | } 312 | -------------------------------------------------------------------------------- /pkg/server/utils.go: -------------------------------------------------------------------------------- 1 | package server 2 | 3 | import ( 4 | "net" 5 | "time" 6 | ) 7 | 8 | //UnixDial dials to a unix socket using net.DialTimeout 9 | func UnixDial(addr string, timeout time.Duration) (net.Conn, error) { 10 | return net.DialTimeout("unix", addr, timeout) 11 | } 12 | --------------------------------------------------------------------------------