/
deployment.go
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/
deployment.go
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// Copyright 2020 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
package statusreaders
import (
"context"
appsv1 "k8s.io/api/apps/v1"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime/schema"
"sigs.k8s.io/cli-utils/pkg/kstatus/polling/engine"
"sigs.k8s.io/cli-utils/pkg/kstatus/polling/event"
"sigs.k8s.io/cli-utils/pkg/kstatus/status"
"sigs.k8s.io/cli-utils/pkg/object"
)
func NewDeploymentResourceReader(mapper meta.RESTMapper, rsStatusReader resourceTypeStatusReader) engine.StatusReader {
return &baseStatusReader{
mapper: mapper,
resourceStatusReader: &deploymentResourceReader{
mapper: mapper,
rsStatusReader: rsStatusReader,
},
}
}
// deploymentResourceReader is a resourceTypeStatusReader that can fetch Deployment
// resources from the cluster, knows how to find any ReplicaSets belonging to the
// Deployment, and compute status for the deployment.
type deploymentResourceReader struct {
mapper meta.RESTMapper
// rsStatusReader is the implementation of the resourceTypeStatusReader
// the knows how to compute the status for ReplicaSets.
rsStatusReader resourceTypeStatusReader
}
var _ resourceTypeStatusReader = &deploymentResourceReader{}
func (d *deploymentResourceReader) Supports(gk schema.GroupKind) bool {
return gk == appsv1.SchemeGroupVersion.WithKind("Deployment").GroupKind()
}
func (d *deploymentResourceReader) ReadStatusForObject(ctx context.Context, reader engine.ClusterReader,
deployment *unstructured.Unstructured) (*event.ResourceStatus, error) {
identifier := object.UnstructuredToObjMetadata(deployment)
replicaSetStatuses, err := statusForGeneratedResources(ctx, d.mapper, reader, d.rsStatusReader, deployment,
appsv1.SchemeGroupVersion.WithKind("ReplicaSet").GroupKind(), "spec", "selector")
if err != nil {
return errResourceToResourceStatus(err, deployment)
}
// Currently this engine just uses the status library for computing
// status for the deployment. But we do have the status and state for all
// ReplicaSets and Pods in the ObservedReplicaSets data structure, so the
// rules can be improved to take advantage of this information.
res, err := status.Compute(deployment)
if err != nil {
return errResourceToResourceStatus(err, deployment, replicaSetStatuses...)
}
return &event.ResourceStatus{
Identifier: identifier,
Status: res.Status,
Resource: deployment,
Message: res.Message,
GeneratedResources: replicaSetStatuses,
}, nil
}