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jobs.go
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/
jobs.go
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package jobs
import (
"context"
"fmt"
"github.com/kubevirt/vm-import-operator/pkg/utils"
batchv1 "k8s.io/api/batch/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const (
prefix = "vmimport.v2v.kubevirt.io"
vmiNameLabel = prefix + "/vmi-name"
)
// Manager provides operations on batch Jobs
type Manager struct {
client client.Client
}
// NewManager creates new Job manager
func NewManager(client client.Client) Manager {
return Manager{client: client}
}
// FindFor retrieves a Job matching given labels. If none can be found, both error and pointer will be nil. When there is more than 1 matching Job, error will be returned.
func (m *Manager) FindFor(vmiCrName types.NamespacedName) (*batchv1.Job, error) {
jobList := batchv1.JobList{}
labels := client.MatchingLabels{
vmiNameLabel: utils.EnsureLabelValueLength(vmiCrName.Name),
}
err := m.client.List(context.TODO(), &jobList, labels, client.InNamespace(vmiCrName.Namespace))
if err != nil {
return nil, err
}
switch items := jobList.Items; len(items) {
case 1:
return &items[0], nil
case 0:
return nil, nil
default:
return nil, fmt.Errorf("too many jobs matching given labels: %v", labels)
}
}
// CreateFor creates given Job, overriding given Name with a generated one. The Job will be associated with vmiCrName.
func (m *Manager) CreateFor(job *batchv1.Job, vmiCrName types.NamespacedName) error {
job.Namespace = vmiCrName.Namespace
// Force generation
job.GenerateName = prefix
job.Name = ""
if job.Labels == nil {
job.Labels = make(map[string]string)
}
job.Labels[vmiNameLabel] = utils.EnsureLabelValueLength(vmiCrName.Name)
if job.Spec.Template.Labels == nil {
job.Spec.Template.Labels = make(map[string]string)
}
job.Spec.Template.Labels[vmiNameLabel] = utils.EnsureLabelValueLength(vmiCrName.Name)
return m.client.Create(context.TODO(), job)
}
// DeleteFor removes the Job created for vmiCrName
func (m *Manager) DeleteFor(vmiCrName types.NamespacedName) error {
job, err := m.FindFor(vmiCrName)
if err != nil {
return err
}
if job != nil {
foreground := metav1.DeletePropagationForeground
opts := &client.DeleteOptions{PropagationPolicy: &foreground}
return m.client.Delete(context.TODO(), job, opts)
}
return nil
}