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prune.go
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prune.go
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/*
Copyright 2017 The Kubernetes 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 prune
import (
"fmt"
"strings"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/runtime/schema"
)
type Resource struct {
group string
version string
kind string
namespaced bool
}
func (pr Resource) String() string {
return fmt.Sprintf("%v/%v, Kind=%v, Namespaced=%v", pr.group, pr.version, pr.kind, pr.namespaced)
}
func GetRESTMappings(mapper meta.RESTMapper, pruneResources []Resource) (namespaced, nonNamespaced []*meta.RESTMapping, err error) {
if len(pruneResources) == 0 {
// default allowlist
pruneResources = []Resource{
{"", "v1", "ConfigMap", true},
{"", "v1", "Endpoints", true},
{"", "v1", "Namespace", false},
{"", "v1", "PersistentVolumeClaim", true},
{"", "v1", "PersistentVolume", false},
{"", "v1", "Pod", true},
{"", "v1", "ReplicationController", true},
{"", "v1", "Secret", true},
{"", "v1", "Service", true},
{"batch", "v1", "Job", true},
{"batch", "v1", "CronJob", true},
{"networking.k8s.io", "v1", "Ingress", true},
{"apps", "v1", "DaemonSet", true},
{"apps", "v1", "Deployment", true},
{"apps", "v1", "ReplicaSet", true},
{"apps", "v1", "StatefulSet", true},
}
}
for _, resource := range pruneResources {
addedMapping, err := mapper.RESTMapping(schema.GroupKind{Group: resource.group, Kind: resource.kind}, resource.version)
if err != nil {
return nil, nil, fmt.Errorf("invalid resource %v: %v", resource, err)
}
if resource.namespaced {
namespaced = append(namespaced, addedMapping)
} else {
nonNamespaced = append(nonNamespaced, addedMapping)
}
}
return namespaced, nonNamespaced, nil
}
func ParseResources(mapper meta.RESTMapper, gvks []string) ([]Resource, error) {
pruneResources := []Resource{}
for _, groupVersionKind := range gvks {
gvk := strings.Split(groupVersionKind, "/")
if len(gvk) != 3 {
return nil, fmt.Errorf("invalid GroupVersionKind format: %v, please follow <group/version/kind>", groupVersionKind)
}
if gvk[0] == "core" {
gvk[0] = ""
}
mapping, err := mapper.RESTMapping(schema.GroupKind{Group: gvk[0], Kind: gvk[2]}, gvk[1])
if err != nil {
return pruneResources, err
}
var namespaced bool
namespaceScope := mapping.Scope.Name()
switch namespaceScope {
case meta.RESTScopeNameNamespace:
namespaced = true
case meta.RESTScopeNameRoot:
namespaced = false
default:
return pruneResources, fmt.Errorf("Unknown namespace scope: %q", namespaceScope)
}
pruneResources = append(pruneResources, Resource{gvk[0], gvk[1], gvk[2], namespaced})
}
return pruneResources, nil
}