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package k8s
import (
"bytes"
"context"
"gitlab.com/gitlab-org/cluster-integration/gitlab-agent/v16/internal/module/modagent"
"gitlab.com/gitlab-org/cluster-integration/gitlab-agent/v16/internal/tool/logz"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/cli-runtime/pkg/resource"
"k8s.io/client-go/kubernetes"
"k8s.io/kubectl/pkg/cmd/util"
"sigs.k8s.io/cli-utils/pkg/apply"
"sigs.k8s.io/cli-utils/pkg/apply/event"
"sigs.k8s.io/cli-utils/pkg/common"
"sigs.k8s.io/cli-utils/pkg/inventory"
"sigs.k8s.io/cli-utils/pkg/kstatus/watcher"
"sigs.k8s.io/cli-utils/pkg/object/validation"
)
type K8sClient struct {
log *zap.Logger
clientset kubernetes.Interface
applier *apply.Applier
factory util.Factory
}
func New(log *zap.Logger, factory util.Factory) (*K8sClient, error) {
clientset, err := factory.KubernetesClientSet()
if err != nil {
return nil, err
}
invClient, err := inventory.ClusterClientFactory{
StatusPolicy: inventory.StatusPolicyNone,
}.NewClient(factory)
if err != nil {
return nil, err
}
applier, err := apply.NewApplierBuilder().
WithFactory(factory).
WithInventoryClient(invClient).
Build()
if err != nil {
return nil, err
}
return &K8sClient{
log: log,
clientset: clientset,
applier: applier,
factory: factory,
}, nil
}
func (k *K8sClient) NamespaceExists(ctx context.Context, name string) bool {
client := k.clientset.CoreV1().Namespaces()
_, err := client.Get(ctx, name, metav1.GetOptions{})
return err == nil
}
func (k *K8sClient) CreateNamespace(ctx context.Context, name string) error {
client := k.clientset.CoreV1().Namespaces()
nsSpec := &corev1.Namespace{
ObjectMeta: metav1.ObjectMeta{
Name: name,
},
}
_, err := client.Create(ctx, nsSpec, metav1.CreateOptions{})
return err
}
func (k *K8sClient) DeleteNamespace(ctx context.Context, name string) error {
client := k.clientset.CoreV1().Namespaces()
return client.Delete(ctx, name, metav1.DeleteOptions{})
}
func (k *K8sClient) Apply(ctx context.Context, namespace string, config string) error {
objs, err := k.decode([]byte(config))
if err != nil {
return err
}
invObj, objs := k.splitObjects(namespace, objs)
// process work - apply to cluster
k.log.Debug("Applying work to cluster")
applierOptions := apply.ApplierOptions{
ServerSideOptions: common.ServerSideOptions{
ServerSideApply: true,
ForceConflicts: true,
FieldManager: modagent.FieldManager,
},
ReconcileTimeout: 0,
EmitStatusEvents: true,
PruneTimeout: 0,
ValidationPolicy: validation.ExitEarly,
WatcherRESTScopeStrategy: watcher.RESTScopeNamespace,
}
events := k.applier.Run(ctx, inventory.WrapInventoryInfoObj(invObj), objs, applierOptions)
k.log.Debug("Applied work to cluster")
// We listen on the events channel in goroutine
// not to block this function's execution
go func() {
// TODO: Add logging as a part of processing the events above
// issue: https://gitlab.com/gitlab-org/gitlab/-/issues/397001
for e := range events {
k.log.Debug("Applied event", applyEvent(e))
}
}()
return nil
}
func (k *K8sClient) decode(data []byte) ([]*unstructured.Unstructured, error) {
// 1. parse in local mode to retrieve objects.
builder := resource.NewBuilder(k.factory).
ContinueOnError().
Flatten().
Unstructured().
Local()
builder.Stream(bytes.NewReader(data), "main")
result := builder.Do()
var objs []*unstructured.Unstructured
err := result.Visit(func(info *resource.Info, err error) error {
if err != nil {
return err
}
objs = append(objs, info.Object.(*unstructured.Unstructured))
return nil
})
if err != nil {
return nil, err
}
return objs, nil
}
func (k *K8sClient) splitObjects(namespace string, objs []*unstructured.Unstructured) (*unstructured.Unstructured, []*unstructured.Unstructured) {
inventoryObjects := make([]*unstructured.Unstructured, 0, 1)
resources := make([]*unstructured.Unstructured, 0, len(objs))
for _, obj := range objs {
if inventory.IsInventoryObject(obj) {
inventoryObjects = append(inventoryObjects, obj)
} else {
resources = append(resources, obj)
}
}
if len(inventoryObjects) == 0 {
return k.defaultInventoryObjTemplate(namespace), resources
}
return inventoryObjects[0], resources
}
func (k *K8sClient) defaultInventoryObjTemplate(namespace string) *unstructured.Unstructured {
return &unstructured.Unstructured{
Object: map[string]interface{}{
"apiVersion": "v1",
"kind": "ConfigMap",
"metadata": map[string]interface{}{
"name": "remote-dev-inventory",
"namespace": namespace,
"labels": map[string]interface{}{
common.InventoryLabel: "remote_development",
},
},
},
}
}
func applyEvent(event event.Event) zap.Field {
return zap.Inline(zapcore.ObjectMarshalerFunc(func(encoder zapcore.ObjectEncoder) error {
encoder.AddString(logz.ApplyEvent, event.String())
return nil
}))
}
|
