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pod.go
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pod.go
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/*
* Copyright 2022 The Furiko 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 podtaskexecutor
import (
"encoding/json"
"strconv"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
execution "github.com/furiko-io/furiko/apis/execution/v1alpha1"
"github.com/furiko-io/furiko/pkg/execution/tasks"
"github.com/furiko-io/furiko/pkg/execution/util/job"
"github.com/furiko-io/furiko/pkg/execution/util/parallel"
"github.com/furiko-io/furiko/pkg/execution/variablecontext"
"github.com/furiko-io/furiko/pkg/utils/meta"
)
// NewPod returns a new Pod object for the given Job.
func NewPod(
rj *execution.Job,
template *corev1.PodTemplateSpec,
index tasks.TaskIndex,
) (*corev1.Pod, error) {
// Generate name for pod.
podName, err := job.GenerateTaskName(rj.Name, index)
if err != nil {
return nil, errors.Wrapf(err, "cannot generate pod name")
}
// Generate PodSpec after substitutions.
podSpec := SubstitutePodSpec(rj, template.Spec, variablecontext.TaskSpec{
Name: podName,
Namespace: rj.GetNamespace(),
RetryIndex: index.Retry,
ParallelIndex: index.Parallel,
})
hash, err := parallel.HashIndex(index.Parallel)
if err != nil {
return nil, errors.Wrapf(err, "cannot hash parallel index")
}
// Make copy for mutation.
templateMeta := template.ObjectMeta.DeepCopy()
// Compute labels.
meta.SetLabel(templateMeta, LabelKeyJobUID, string(rj.GetUID()))
meta.SetLabel(templateMeta, LabelKeyTaskRetryIndex, strconv.Itoa(int(index.Retry)))
meta.SetLabel(templateMeta, LabelKeyTaskParallelIndexHash, hash)
// Compute annotations.
parallelIndexMarshaled, err := json.Marshal(index.Parallel)
if err != nil {
return nil, errors.Wrapf(err, "cannot marshal parallel index")
}
meta.SetAnnotation(templateMeta, AnnotationKeyTaskParallelIndex, string(parallelIndexMarshaled))
pod := &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Namespace: rj.GetNamespace(),
Name: podName,
Labels: templateMeta.Labels,
Annotations: templateMeta.Annotations,
Finalizers: templateMeta.Finalizers,
OwnerReferences: []metav1.OwnerReference{
*metav1.NewControllerRef(rj, execution.GVKJob),
},
},
Spec: podSpec,
}
return pod, nil
}