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replicaset.go
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replicaset.go
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package v1beta1
import (
. "github.com/appscode/go/types"
"github.com/appscode/kutil"
"github.com/golang/glog"
"github.com/pkg/errors"
extensions "k8s.io/api/extensions/v1beta1"
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"
)
func CreateOrPatchReplicaSet(c kubernetes.Interface, meta metav1.ObjectMeta, transform func(*extensions.ReplicaSet) *extensions.ReplicaSet) (*extensions.ReplicaSet, kutil.VerbType, error) {
cur, err := c.ExtensionsV1beta1().ReplicaSets(meta.Namespace).Get(meta.Name, metav1.GetOptions{})
if kerr.IsNotFound(err) {
glog.V(3).Infof("Creating ReplicaSet %s/%s.", meta.Namespace, meta.Name)
out, err := c.ExtensionsV1beta1().ReplicaSets(meta.Namespace).Create(transform(&extensions.ReplicaSet{
TypeMeta: metav1.TypeMeta{
Kind: "ReplicaSet",
APIVersion: extensions.SchemeGroupVersion.String(),
},
ObjectMeta: meta,
}))
return out, kutil.VerbCreated, err
} else if err != nil {
return nil, kutil.VerbUnchanged, err
}
return PatchReplicaSet(c, cur, transform)
}
func PatchReplicaSet(c kubernetes.Interface, cur *extensions.ReplicaSet, transform func(*extensions.ReplicaSet) *extensions.ReplicaSet) (*extensions.ReplicaSet, kutil.VerbType, error) {
return PatchReplicaSetObject(c, cur, transform(cur.DeepCopy()))
}
func PatchReplicaSetObject(c kubernetes.Interface, cur, mod *extensions.ReplicaSet) (*extensions.ReplicaSet, 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, extensions.ReplicaSet{})
if err != nil {
return nil, kutil.VerbUnchanged, err
}
if len(patch) == 0 || string(patch) == "{}" {
return cur, kutil.VerbUnchanged, nil
}
glog.V(3).Infof("Patching ReplicaSet %s/%s with %s.", cur.Namespace, cur.Name, string(patch))
out, err := c.ExtensionsV1beta1().ReplicaSets(cur.Namespace).Patch(cur.Name, types.StrategicMergePatchType, patch)
return out, kutil.VerbPatched, err
}
func TryUpdateReplicaSet(c kubernetes.Interface, meta metav1.ObjectMeta, transform func(*extensions.ReplicaSet) *extensions.ReplicaSet) (result *extensions.ReplicaSet, err error) {
attempt := 0
err = wait.PollImmediate(kutil.RetryInterval, kutil.RetryTimeout, func() (bool, error) {
attempt++
cur, e2 := c.ExtensionsV1beta1().ReplicaSets(meta.Namespace).Get(meta.Name, metav1.GetOptions{})
if kerr.IsNotFound(e2) {
return false, e2
} else if e2 == nil {
result, e2 = c.ExtensionsV1beta1().ReplicaSets(cur.Namespace).Update(transform(cur.DeepCopy()))
return e2 == nil, nil
}
glog.Errorf("Attempt %d failed to update ReplicaSet %s/%s due to %v.", attempt, cur.Namespace, cur.Name, e2)
return false, nil
})
if err != nil {
err = errors.Errorf("failed to update ReplicaSet %s/%s after %d attempts due to %v", meta.Namespace, meta.Name, attempt, err)
}
return
}
func WaitUntilReplicaSetReady(c kubernetes.Interface, meta metav1.ObjectMeta) error {
return wait.PollImmediate(kutil.RetryInterval, kutil.ReadinessTimeout, func() (bool, error) {
if obj, err := c.ExtensionsV1beta1().ReplicaSets(meta.Namespace).Get(meta.Name, metav1.GetOptions{}); err == nil {
return Int32(obj.Spec.Replicas) == obj.Status.ReadyReplicas, nil
}
return false, nil
})
}