130 lines
2.8 KiB
Go
130 lines
2.8 KiB
Go
// SPDX-License-Identifier: Apache-2.0
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// Copyright Authors of K9s
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package dao
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import (
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"context"
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"errors"
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"fmt"
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"strconv"
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"strings"
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"github.com/derailed/k9s/internal/client"
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"github.com/derailed/k9s/internal/render"
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appsv1 "k8s.io/api/apps/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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cmdutil "k8s.io/kubectl/pkg/cmd/util"
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"k8s.io/kubectl/pkg/polymorphichelpers"
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)
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var (
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_ ImageLister = (*ReplicaSet)(nil)
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)
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// ReplicaSet represents a replicaset K8s resource.
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type ReplicaSet struct {
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Resource
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}
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// ListImages lists container images.
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func (r *ReplicaSet) ListImages(ctx context.Context, fqn string) ([]string, error) {
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rs, err := r.Load(r.Factory, fqn)
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if err != nil {
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return nil, err
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}
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return render.ExtractImages(&rs.Spec.Template.Spec), nil
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}
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// Load returns a given instance.
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func (r *ReplicaSet) Load(f Factory, path string) (*appsv1.ReplicaSet, error) {
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o, err := f.Get("apps/v1/replicasets", path, true, labels.Everything())
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if err != nil {
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return nil, err
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}
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var rs appsv1.ReplicaSet
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err = runtime.DefaultUnstructuredConverter.FromUnstructured(o.(*unstructured.Unstructured).Object, &rs)
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if err != nil {
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return nil, err
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}
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return &rs, nil
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}
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func getRSRevision(rs *appsv1.ReplicaSet) (int64, error) {
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revision := rs.Annotations["deployment.kubernetes.io/revision"]
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if rs.Status.Replicas != 0 {
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return 0, errors.New("can not rollback current replica")
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}
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vers, err := strconv.Atoi(revision)
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if err != nil {
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return 0, errors.New("revision conversion failed")
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}
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return int64(vers), nil
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}
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func controllerInfo(rs *appsv1.ReplicaSet) (string, string, string, error) {
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for _, ref := range rs.OwnerReferences {
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if ref.Controller == nil {
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continue
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}
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group, tokens := ref.APIVersion, strings.Split(ref.APIVersion, "/")
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if len(tokens) == 2 {
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group = tokens[0]
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}
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return ref.Name, ref.Kind, group, nil
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}
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return "", "", "", fmt.Errorf("unable to find controller for replicaset: %s", rs.Name)
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}
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// Rollback reverses the last deployment.
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func (r *ReplicaSet) Rollback(fqn string) error {
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rs, err := r.Load(r.Factory, fqn)
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if err != nil {
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return err
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}
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version, err := getRSRevision(rs)
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if err != nil {
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return err
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}
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name, kind, apiGroup, err := controllerInfo(rs)
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if err != nil {
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return err
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}
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dial, err := r.Client().Dial()
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if err != nil {
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return err
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}
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rb, err := polymorphichelpers.RollbackerFor(schema.GroupKind{
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Group: apiGroup,
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Kind: kind,
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},
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dial,
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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 ddp Deployment
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ddp.Init(r.Factory, client.NewGVR("apps/v1/deployments"))
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dp, err := ddp.GetInstance(client.FQN(rs.Namespace, name))
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if err != nil {
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return err
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}
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_, err = rb.Rollback(dp, map[string]string{}, version, cmdutil.DryRunNone)
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if err != nil {
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return err
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}
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return nil
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}
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