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  • kubebuilder开发一:从controller创建deployment

    1、直接在controller目录下创建文件virtualmachine_controller.go文件

    /*
    Copyright 2020 fanux.
    
    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.
    */
    
    package controllers
    
    import (
    	"context"
    	"fmt"
    
    	infrav1 "VM/api/v1"
    	"github.com/go-logr/logr"
    	appv1 "k8s.io/api/apps/v1"
    	corev1 "k8s.io/api/core/v1"
    	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    	"k8s.io/apimachinery/pkg/runtime"
    	ctrl "sigs.k8s.io/controller-runtime"
    	"sigs.k8s.io/controller-runtime/pkg/client"
    )
    
    // VirtulMachineReconciler reconciles a VirtulMachine object
    type VirtulMachineReconciler struct {
    	client.Client
    	Log    logr.Logger
    	Scheme *runtime.Scheme
    }
    
    // +kubebuilder:rbac:groups=infra.sealyun.com,resources=virtulmachines,verbs=get;list;watch;create;update;patch;delete
    // +kubebuilder:rbac:groups=infra.sealyun.com,resources=virtulmachines/status,verbs=get;update;patch
    
    func (r *VirtulMachineReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
    	ctx := context.Background()
    	log := r.Log.WithValues("virtulmachine", req.NamespacedName)
    
    	// your logic here
    	vm := &infrav1.VirtulMachine{}
    	if err := r.Get(ctx, req.NamespacedName, vm); err != nil {
    		log.Error(err, "unable to fetch vm")
    	} else {
    		fmt.Println(vm.Spec.CPU, vm.Spec.Memory)
    	}
    	log.Info("get it ")
    	podLabels := map[string]string{
    		"app": req.Name,
    	}
    	// 拼凑deploy资源的定义
    	deployment := appv1.Deployment{
    		TypeMeta: metav1.TypeMeta{
    			Kind:       "Deployment",
    			APIVersion: "apps/v1",
    		},
    		ObjectMeta: metav1.ObjectMeta{
    			Name:      req.Name,
    			Namespace: req.Namespace,
    		},
    		Spec: appv1.DeploymentSpec{
    			Selector: &metav1.LabelSelector{
    				MatchLabels: podLabels,
    			},
    			Template: corev1.PodTemplateSpec{
    				ObjectMeta: metav1.ObjectMeta{
    					Labels: podLabels,
    				},
    				Spec: corev1.PodSpec{
    					Containers: []corev1.Container{
    						{
    							Name: req.Name,
    							Image: "nginx:1.13.5-alpine",
    							ImagePullPolicy: "Always",
    							Ports: []corev1.ContainerPort{
    								{
    									ContainerPort: 8080,
    								},
    							},
    						},
    					},
    				},
    			},
    		},
    	}
    
    	if err := r.Create(ctx, &deployment); err != nil {
    		log.Error(err, "创建 Deployment resource 出错")
    		return ctrl.Result{}, err
    	}
    
    	return ctrl.Result{}, nil
    }
    
    func (r *VirtulMachineReconciler) SetupWithManager(mgr ctrl.Manager) error {
    	return ctrl.NewControllerManagedBy(mgr).
    		For(&infrav1.VirtulMachine{}).
    		Complete(r)
    }
    

    二、运行main.go文件,

    三、查看集群内的deployment

    [root@k8s-master samples]# kubectl get deployments.apps 
    NAME                   READY   UP-TO-DATE   AVAILABLE   AGE
    centos-deployment      2/2     2            2           22d
    nginx-deployment       3/3     3            3           21d
    qperf-server           1/1     1            1           16d
    virtulmachine-sample   1/1     1            1           17h
    
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  • 原文地址:https://www.cnblogs.com/wuchangblog/p/14245219.html
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