install.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 manifests

import (
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"k8s.io/apimachinery/pkg/api/meta"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"k8s.io/apimachinery/pkg/runtime/serializer/yaml"
	"k8s.io/apimachinery/pkg/types"
	versionutil "k8s.io/apimachinery/pkg/util/version"
	"k8s.io/cli-runtime/pkg/genericclioptions"
	"k8s.io/cli-runtime/pkg/printers"
	"k8s.io/cli-runtime/pkg/resource"
	"k8s.io/client-go/discovery"
	"k8s.io/client-go/discovery/cached/memory"
	"k8s.io/client-go/dynamic"
	"k8s.io/client-go/rest"
	"k8s.io/client-go/restmapper"
	"k8s.io/client-go/util/homedir"
	"k8s.io/kubectl/pkg/cmd/apply"
	cmdutil "k8s.io/kubectl/pkg/cmd/util"
	"os"
	"path/filepath"
	"strings"
)

var (
	defaultCacheDir = filepath.Join(homedir.HomeDir(), ".kube", "cache")
)

func InstallYaml(manifests []string, namespace, kubeconfig, version string) error {

	configFlags := NewConfigFlags(kubeconfig, namespace)
	o, err := CreateApplyOptions(configFlags, manifests, version)
	if err != nil {
		return err
	}

	if err := o.Run(); err != nil {
		return err
	}

	return nil
}

func CreateApplyOptions(configFlags *genericclioptions.ConfigFlags, manifests []string, version string) (*apply.ApplyOptions, error) {
	var err error
	matchVersionKubeConfigFlags := NewMatchVersionFlags(configFlags)
	f := cmdutil.NewFactory(matchVersionKubeConfigFlags)
	ioStreams := genericclioptions.IOStreams{In: nil, Out: os.Stdout, ErrOut: os.Stderr}

	o := apply.NewApplyOptions(ioStreams)

	cmp, err := versionutil.MustParseSemantic(version).Compare("v1.16.0")
	if err != nil {
		return nil, errors.New(fmt.Sprintf("Failed to compare version: %v", err))
	}
	if cmp == 0 || cmp == 1 {
		o.ServerSideApply = true
	} else {
		o.ServerSideApply = false
	}

	o.ForceConflicts = true
	o.DryRunStrategy = cmdutil.DryRunNone

	o.DynamicClient, err = f.DynamicClient()
	if err != nil {
		return nil, err
	}

	discoveryClient, err := f.ToDiscoveryClient()
	if err != nil {
		return nil, err
	}

	o.DryRunVerifier = resource.NewDryRunVerifier(o.DynamicClient, discoveryClient)
	o.FieldManager = "client-side-apply"

	o.ToPrinter = func(operation string) (printers.ResourcePrinter, error) {
		o.PrintFlags.NamePrintFlags.Operation = operation
		cmdutil.PrintFlagsWithDryRunStrategy(o.PrintFlags, o.DryRunStrategy)
		return o.PrintFlags.ToPrinter()
	}
	_ = o.RecordFlags.CompleteWithChangeCause("")

	o.Recorder, err = o.RecordFlags.ToRecorder()
	if err != nil {
		return nil, err
	}

	filenames := manifests
	o.DeleteFlags.FileNameFlags.Filenames = &filenames

	o.DeleteOptions = o.DeleteFlags.ToOptions(o.DynamicClient, o.IOStreams)
	err = o.DeleteOptions.FilenameOptions.RequireFilenameOrKustomize()
	if err != nil {
		return nil, err
	}

	o.OpenAPISchema, _ = f.OpenAPISchema()
	o.Validator, err = f.Validator(true)
	if err != nil {
		return nil, err
	}
	o.Builder = f.NewBuilder()
	o.Mapper, err = f.ToRESTMapper()
	if err != nil {
		return nil, err
	}

	o.Namespace, o.EnforceNamespace, err = f.ToRawKubeConfigLoader().Namespace()
	if err != nil {
		return nil, err
	}

	o.Prune = false

	o.PostProcessorFn = o.PrintAndPrunePostProcessor()

	return o, err
}

func NewConfigFlags(kubeconfig, namespace string) *genericclioptions.ConfigFlags {
	var impersonateGroup []string
	insecure := false

	return &genericclioptions.ConfigFlags{
		Insecure:   &insecure,
		Timeout:    stringptr("0"),
		KubeConfig: stringptr(kubeconfig),

		CacheDir:         stringptr(defaultCacheDir),
		ClusterName:      stringptr(""),
		AuthInfoName:     stringptr(""),
		Context:          stringptr(""),
		Namespace:        stringptr(namespace),
		APIServer:        stringptr(""),
		TLSServerName:    stringptr(""),
		CertFile:         stringptr(""),
		KeyFile:          stringptr(""),
		CAFile:           stringptr(""),
		BearerToken:      stringptr(""),
		Impersonate:      stringptr(""),
		ImpersonateGroup: &impersonateGroup,
	}
}

func stringptr(val string) *string {
	return &val
}

func NewMatchVersionFlags(delegate genericclioptions.RESTClientGetter) *cmdutil.MatchVersionFlags {
	return &cmdutil.MatchVersionFlags{
		Delegate: delegate,
	}
}

var decUnstructured = yaml.NewDecodingSerializer(unstructured.UnstructuredJSONScheme)

func DoServerSideApply(ctx context.Context, cfg *rest.Config, objectYAML []byte) error {
	dc, err := discovery.NewDiscoveryClientForConfig(cfg)
	if err != nil {
		return err
	}
	mapper := restmapper.NewDeferredDiscoveryRESTMapper(memory.NewMemCacheClient(dc))

	dyn, err := dynamic.NewForConfig(cfg)
	if err != nil {
		return err
	}

	obj := &unstructured.Unstructured{}
	_, gvk, err := decUnstructured.Decode(objectYAML, nil, obj)
	if err != nil {
		return err
	}

	mapping, err := mapper.RESTMapping(gvk.GroupKind(), gvk.Version)
	if err != nil {
		return err
	}

	var dr dynamic.ResourceInterface
	if mapping.Scope.Name() == meta.RESTScopeNameNamespace {
		dr = dyn.Resource(mapping.Resource).Namespace(obj.GetNamespace())
	} else {
		dr = dyn.Resource(mapping.Resource)
	}

	data, err := json.Marshal(obj)
	if err != nil {
		return err
	}

	force := true
	if _, err = dr.Patch(ctx, obj.GetName(), types.ApplyPatchType, data, metav1.PatchOptions{Force: &force, FieldManager: "sample-controller"}); err != nil {
		return err
	}
	fmt.Println(strings.ToLower(obj.GetKind()) + "/" + obj.GetName() + "  " + "created")
	return nil
}

func DoPatchCluster(client dynamic.Interface, name string, data []byte) error {
	var gvr = schema.GroupVersionResource{
		Group:    "kubekey.kubesphere.io",
		Version:  "v1alpha1",
		Resource: "clusters",
	}
	cfg, err := rest.InClusterConfig()
	if err != nil {
		panic(err.Error())
	}
	dyn, err := dynamic.NewForConfig(cfg)
	if err != nil {
		return err
	}

	if _, err := dyn.Resource(gvr).Patch(context.TODO(), name, types.MergePatchType, data, metav1.PatchOptions{}); err != nil {
		fmt.Println("error")
		return err
	}
	dyn.Resource(gvr).Get(context.TODO(), "aaa", metav1.GetOptions{})
	return nil
}

func GetCluster(name string) (*unstructured.Unstructured, error) {
	var gvr = schema.GroupVersionResource{
		Group:    "cluster.kubesphere.io",
		Version:  "v1alpha1",
		Resource: "clusters",
	}
	cfg, err := rest.InClusterConfig()
	if err != nil {
		panic(err.Error())
	}
	dyn, err := dynamic.NewForConfig(cfg)
	if err != nil {
		return nil, err
	}

	var cluster *unstructured.Unstructured
	cluster, err1 := dyn.Resource(gvr).Get(context.TODO(), name, metav1.GetOptions{})
	if err1 != nil {
		return nil, err1
	}

	return cluster, nil
}