/
restic.go
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/
restic.go
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/*
Copyright The Stash 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 util
import (
"fmt"
api "stash.appscode.dev/apimachinery/apis/stash/v1alpha1"
cs "stash.appscode.dev/apimachinery/client/clientset/versioned/typed/stash/v1alpha1"
jsonpatch "github.com/evanphx/json-patch"
"github.com/golang/glog"
kerr "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/wait"
kutil "kmodules.xyz/client-go"
)
func CreateOrPatchRestic(c cs.StashV1alpha1Interface, meta metav1.ObjectMeta, transform func(alert *api.Restic) *api.Restic) (*api.Restic, kutil.VerbType, error) {
cur, err := c.Restics(meta.Namespace).Get(meta.Name, metav1.GetOptions{})
if kerr.IsNotFound(err) {
glog.V(3).Infof("Creating Restic %s/%s.", meta.Namespace, meta.Name)
out, err := c.Restics(meta.Namespace).Create(transform(&api.Restic{
TypeMeta: metav1.TypeMeta{
Kind: "Restic",
APIVersion: api.SchemeGroupVersion.String(),
},
ObjectMeta: meta,
}))
return out, kutil.VerbCreated, err
} else if err != nil {
return nil, kutil.VerbUnchanged, err
}
return PatchRestic(c, cur, transform)
}
func PatchRestic(c cs.StashV1alpha1Interface, cur *api.Restic, transform func(*api.Restic) *api.Restic) (*api.Restic, kutil.VerbType, error) {
return PatchResticObject(c, cur, transform(cur.DeepCopy()))
}
func PatchResticObject(c cs.StashV1alpha1Interface, cur, mod *api.Restic) (*api.Restic, kutil.VerbType, error) {
curJson, err := json.Marshal(cur)
if err != nil {
return nil, kutil.VerbUnchanged, err
}
modJson, err := json.Marshal(mod)
if err != nil {
return nil, kutil.VerbUnchanged, err
}
patch, err := jsonpatch.CreateMergePatch(curJson, modJson)
if err != nil {
return nil, kutil.VerbUnchanged, err
}
if len(patch) == 0 || string(patch) == "{}" {
return cur, kutil.VerbUnchanged, nil
}
glog.V(3).Infof("Patching Restic %s/%s with %s.", cur.Namespace, cur.Name, string(patch))
out, err := c.Restics(cur.Namespace).Patch(cur.Name, types.MergePatchType, patch)
return out, kutil.VerbPatched, err
}
func TryUpdateRestic(c cs.StashV1alpha1Interface, meta metav1.ObjectMeta, transform func(*api.Restic) *api.Restic) (result *api.Restic, err error) {
attempt := 0
err = wait.PollImmediate(kutil.RetryInterval, kutil.RetryTimeout, func() (bool, error) {
attempt++
cur, e2 := c.Restics(meta.Namespace).Get(meta.Name, metav1.GetOptions{})
if kerr.IsNotFound(e2) {
return false, e2
} else if e2 == nil {
result, e2 = c.Restics(cur.Namespace).Update(transform(cur.DeepCopy()))
return e2 == nil, nil
}
glog.Errorf("Attempt %d failed to update Restic %s/%s due to %v.", attempt, cur.Namespace, cur.Name, e2)
return false, nil
})
if err != nil {
err = fmt.Errorf("failed to update Restic %s/%s after %d attempts due to %v", meta.Namespace, meta.Name, attempt, err)
}
return
}