mirror of https://github.com/kubernetes/kops.git
90 lines
2.5 KiB
Go
90 lines
2.5 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package channels
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import (
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"context"
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"fmt"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/dynamic"
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"k8s.io/client-go/restmapper"
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"k8s.io/kops/pkg/applylib/applyset"
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"k8s.io/kops/pkg/kubemanifest"
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)
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type ClientApplier struct {
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Client dynamic.Interface
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RESTMapper *restmapper.DeferredDiscoveryRESTMapper
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}
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// Apply applies the manifest to the cluster.
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func (p *ClientApplier) Apply(ctx context.Context, manifest []byte) error {
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objects, err := kubemanifest.LoadObjectsFrom(manifest)
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if err != nil {
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return fmt.Errorf("failed to parse objects: %w", err)
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}
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// TODO: Cache applyset for more efficient applying
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patchOptions := metav1.PatchOptions{
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FieldManager: "kops",
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}
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// We force to overcome errors like: Apply failed with 1 conflict: conflict with "kubectl-client-side-apply" using apps/v1: .spec.template.spec.containers[name="foo"].image
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// TODO: How to handle this better? In a controller we don't have a choice and have to force eventually.
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// But we could do something like try first without forcing, log the conflict if there is one, and then force.
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// This would mean that if there was a loop we could log/detect it.
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// We could even do things like back-off on the force apply.
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force := true
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patchOptions.Force = &force
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s, err := applyset.New(applyset.Options{
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RESTMapper: p.RESTMapper,
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Client: p.Client,
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PatchOptions: patchOptions,
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})
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if err != nil {
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return err
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}
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var applyableObjects []applyset.ApplyableObject
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for _, object := range objects {
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applyableObjects = append(applyableObjects, object)
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}
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if err := s.SetDesiredObjects(applyableObjects); err != nil {
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return err
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}
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results, err := s.ApplyOnce(ctx)
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if err != nil {
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return fmt.Errorf("failed to apply objects: %w", err)
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}
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// TODO: Implement pruning
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if !results.AllApplied() {
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return fmt.Errorf("not all objects were applied")
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}
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// TODO: Check object health status
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if !results.AllHealthy() {
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return fmt.Errorf("not all objects were healthy")
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}
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return nil
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}
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