kubekey/controllers/cluster_controller.go

/*
Copyright 2020 The KubeSphere 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.
*/

package controllers

import (
	"context"
	"github.com/kubesphere/kubekey/pkg/addons"
	"github.com/kubesphere/kubekey/pkg/cluster/etcd"
	"github.com/kubesphere/kubekey/pkg/cluster/kubernetes"
	"github.com/kubesphere/kubekey/pkg/cluster/preinstall"
	"github.com/kubesphere/kubekey/pkg/container-engine/docker"
	"github.com/kubesphere/kubekey/pkg/plugins/network"
	"github.com/kubesphere/kubekey/pkg/util"
	"github.com/kubesphere/kubekey/pkg/util/executor"
	"github.com/kubesphere/kubekey/pkg/util/manager"
	"github.com/pkg/errors"
	kubeErr "k8s.io/apimachinery/pkg/api/errors"

	"github.com/go-logr/logr"
	"k8s.io/apimachinery/pkg/runtime"
	ctrl "sigs.k8s.io/controller-runtime"
	"sigs.k8s.io/controller-runtime/pkg/client"

	kubekeyv1alpha1 "github.com/kubesphere/kubekey/api/v1alpha1"
)

// ClusterReconciler reconciles a Cluster object
type ClusterReconciler struct {
	client.Client
	Log    logr.Logger
	Scheme *runtime.Scheme
}

// +kubebuilder:rbac:groups=kubekey.kubesphere.io,resources=clusters,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=kubekey.kubesphere.io,resources=clusters/status,verbs=get;update;patch
// +kubebuilder:rbac:groups=core,resources=*,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=storage.k8s.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=rbac.authorization.k8s.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=apps,resources=deployments,verbs=get;list;watch;create;update;patch;delete
// +kubebuilder:rbac:groups=apiextensions.k8s.io,resources=customresourcedefinitions,verbs=*
// +kubebuilder:rbac:groups=installer.kubesphere.io,resources=clusterconfigurations,verbs=*
// +kubebuilder:rbac:groups=admissionregistration.k8s.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=apiregistration.k8s.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=auditing.kubesphere.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=autoscaling,resources=*,verbs=*
// +kubebuilder:rbac:groups=certificates.k8s.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=config.istio.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=core.kubefed.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=devops.kubesphere.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=events.kubesphere.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=batch,resources=*,verbs=*
// +kubebuilder:rbac:groups=extensions,resources=*,verbs=*
// +kubebuilder:rbac:groups=iam.kubesphere.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=jaegertracing.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=logging.kubesphere.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=monitoring.coreos.com,resources=*,verbs=*
// +kubebuilder:rbac:groups=networking.istio.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=notification.kubesphere.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=policy,resources=*,verbs=*
// +kubebuilder:rbac:groups=storage.kubesphere.io,resources=*,verbs=*
// +kubebuilder:rbac:groups=tenant.kubesphere.io,resources=*,verbs=*

func (r *ClusterReconciler) Reconcile(req ctrl.Request) (ctrl.Result, error) {
	ctx := context.Background()
	log := r.Log.WithValues("cluster", req.NamespacedName)
	logger := util.InitLogger(true)

	cluster := &kubekeyv1alpha1.Cluster{}

	if err := r.Get(ctx, req.NamespacedName, cluster); err != nil {
		if kubeErr.IsNotFound(err) {
			log.Info("Cluster resource not found. Ignoring since object must be deleted")
			return ctrl.Result{}, nil
		}
		log.Error(err, "Failed to get Cluster")
		return ctrl.Result{}, err
	}

	newExecutor := executor.NewExecutor(&cluster.Spec, cluster.Name, logger, "", true, true, false, false)

	mgr, err := newExecutor.CreateManager()
	if err != nil {
		return ctrl.Result{}, err
	}

	if len(cluster.Status.Conditions) == 0 || len(cluster.Status.Nodes) == 0 {
		// install cluster
		if err := clusterTasksExecute(r, ctx, cluster, mgr); err != nil {
			return ctrl.Result{}, err
		}
		// install addons
		if err := AddonsTasksExecute(r, ctx, cluster, mgr); err != nil {
			return ctrl.Result{}, err
		}
	}

	if len(mgr.AllNodes) > cluster.Status.NodesCount {
		// add nodes
		if err := clusterTasksExecute(r, ctx, cluster, mgr); err != nil {
			return ctrl.Result{}, err
		}
	}

	return ctrl.Result{}, nil
}

func (r *ClusterReconciler) SetupWithManager(mgr ctrl.Manager) error {
	return ctrl.NewControllerManagedBy(mgr).
		For(&kubekeyv1alpha1.Cluster{}).
		Complete(r)
}

func runTasks(mgr *manager.Manager, tasks []manager.Task) error {
	for _, step := range tasks {
		if err := step.Run(mgr); err != nil {
			return errors.Wrap(err, step.ErrMsg)
		}
	}
	return nil
}

var (
	initNodesTasks = []manager.Task{
		{Task: preinstall.DownloadBinaries, ErrMsg: "Failed to download kube binaries"},
		{Task: preinstall.InitOS, ErrMsg: "Failed to init OS"},
		{Task: docker.InstallerDocker, ErrMsg: "Failed to install docker"},
	}

	pullImagesTaks = []manager.Task{
		{Task: preinstall.PrePullImages, ErrMsg: "Failed to pre-pull images"},
	}

	initEtcdClusterTasks = []manager.Task{
		{Task: etcd.GenerateEtcdCerts, ErrMsg: "Failed to generate etcd certs"},
		{Task: etcd.SyncEtcdCertsToMaster, ErrMsg: "Failed to sync etcd certs"},
		{Task: etcd.GenerateEtcdService, ErrMsg: "Failed to create etcd service"},
		{Task: etcd.SetupEtcdCluster, ErrMsg: "Failed to start etcd cluster"},
		{Task: etcd.RefreshEtcdConfig, ErrMsg: "Failed to refresh etcd configuration"},
		{Task: etcd.BackupEtcd, ErrMsg: "Failed to backup etcd data"},
	}

	initControlPlaneTasks = []manager.Task{
		{Task: kubernetes.GetClusterStatus, ErrMsg: "Failed to get cluster status"},
		{Task: kubernetes.InstallKubeBinaries, ErrMsg: "Failed to install kube binaries"},
		{Task: kubernetes.InitKubernetesCluster, ErrMsg: "Failed to init kubernetes cluster"},
		{Task: network.DeployNetworkPlugin, ErrMsg: "Failed to deploy network plugin"},
	}

	joinNodesTasks = []manager.Task{
		{Task: kubernetes.JoinNodesToCluster, ErrMsg: "Failed to join node"},
	}

	installAddonsTasks = []manager.Task{
		{Task: addons.InstallAddons, ErrMsg: "Failed to deploy addons"},
	}
)