/
rc.go
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/
rc.go
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/*
Copyright AppsCode Inc. and Contributors
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 v1
import (
"context"
"github.com/pkg/errors"
"gomodules.xyz/pointer"
core "k8s.io/api/core/v1"
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/strategicpatch"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/kubernetes"
"k8s.io/klog/v2"
kutil "kmodules.xyz/client-go"
)
func CreateOrPatchRC(ctx context.Context, c kubernetes.Interface, meta metav1.ObjectMeta, transform func(*core.ReplicationController) *core.ReplicationController, opts metav1.PatchOptions) (*core.ReplicationController, kutil.VerbType, error) {
cur, err := c.CoreV1().ReplicationControllers(meta.Namespace).Get(ctx, meta.Name, metav1.GetOptions{})
if kerr.IsNotFound(err) {
klog.V(3).Infof("Creating ReplicationController %s/%s.", meta.Namespace, meta.Name)
out, err := c.CoreV1().ReplicationControllers(meta.Namespace).Create(ctx, transform(&core.ReplicationController{
TypeMeta: metav1.TypeMeta{
Kind: "ReplicationController",
APIVersion: core.SchemeGroupVersion.String(),
},
ObjectMeta: meta,
}), metav1.CreateOptions{
DryRun: opts.DryRun,
FieldManager: opts.FieldManager,
})
return out, kutil.VerbCreated, err
} else if err != nil {
return nil, kutil.VerbUnchanged, err
}
return PatchRC(ctx, c, cur, transform, opts)
}
func PatchRC(ctx context.Context, c kubernetes.Interface, cur *core.ReplicationController, transform func(*core.ReplicationController) *core.ReplicationController, opts metav1.PatchOptions) (*core.ReplicationController, kutil.VerbType, error) {
return PatchRCObject(ctx, c, cur, transform(cur.DeepCopy()), opts)
}
func PatchRCObject(ctx context.Context, c kubernetes.Interface, cur, mod *core.ReplicationController, opts metav1.PatchOptions) (*core.ReplicationController, 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 := strategicpatch.CreateTwoWayMergePatch(curJson, modJson, core.ReplicationController{})
if err != nil {
return nil, kutil.VerbUnchanged, err
}
if len(patch) == 0 || string(patch) == "{}" {
return cur, kutil.VerbUnchanged, nil
}
klog.V(3).Infof("Patching ReplicationController %s/%s with %s.", cur.Namespace, cur.Name, string(patch))
out, err := c.CoreV1().ReplicationControllers(cur.Namespace).Patch(ctx, cur.Name, types.StrategicMergePatchType, patch, opts)
return out, kutil.VerbPatched, err
}
func TryUpdateRC(ctx context.Context, c kubernetes.Interface, meta metav1.ObjectMeta, transform func(*core.ReplicationController) *core.ReplicationController, opts metav1.UpdateOptions) (result *core.ReplicationController, err error) {
attempt := 0
err = wait.PollImmediate(kutil.RetryInterval, kutil.RetryTimeout, func() (bool, error) {
attempt++
cur, e2 := c.CoreV1().ReplicationControllers(meta.Namespace).Get(ctx, meta.Name, metav1.GetOptions{})
if kerr.IsNotFound(e2) {
return false, e2
} else if e2 == nil {
result, e2 = c.CoreV1().ReplicationControllers(cur.Namespace).Update(ctx, transform(cur.DeepCopy()), opts)
return e2 == nil, nil
}
klog.Errorf("Attempt %d failed to update ReplicationController %s/%s due to %v.", attempt, cur.Namespace, cur.Name, e2)
return false, nil
})
if err != nil {
err = errors.Errorf("failed to update ReplicationController %s/%s after %d attempts due to %v", meta.Namespace, meta.Name, attempt, err)
}
return
}
func WaitUntilRCReady(ctx context.Context, c kubernetes.Interface, meta metav1.ObjectMeta) error {
return wait.PollImmediate(kutil.RetryInterval, kutil.ReadinessTimeout, func() (bool, error) {
if obj, err := c.CoreV1().ReplicationControllers(meta.Namespace).Get(ctx, meta.Name, metav1.GetOptions{}); err == nil {
return pointer.Int32(obj.Spec.Replicas) == obj.Status.ReadyReplicas, nil
}
return false, nil
})
}