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pod_runner.go
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pod_runner.go
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// Copyright 2019 The Kanister 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 kube
import (
"context"
"github.com/pkg/errors"
log "github.com/sirupsen/logrus"
"k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"
)
// PodRunner specifies Kubernetes Client and PodOptions needed for creating Pod
type PodRunner struct {
cli kubernetes.Interface
podOptions *PodOptions
}
// NewPodRunner returns a new PodRunner given Kubernetes Client and PodOptions
func NewPodRunner(cli kubernetes.Interface, options *PodOptions) *PodRunner {
return &PodRunner{
cli: cli,
podOptions: options,
}
}
// Run will create a new Pod based on PodRunner contents and execute the given function
func (p *PodRunner) Run(ctx context.Context, fn func(context.Context, *v1.Pod) (map[string]interface{}, error)) (map[string]interface{}, error) {
ctx, cancel := context.WithCancel(ctx)
defer cancel()
if p.cli == nil || p.podOptions == nil {
return nil, errors.New("Pod Runner not initialized")
}
pod, err := CreatePod(ctx, p.cli, p.podOptions)
if err != nil {
return nil, errors.Wrapf(err, "Failed to create pod")
}
go func() {
<-ctx.Done()
err := DeletePod(context.Background(), p.cli, pod)
if err != nil {
log.Error("Failed to delete pod ", err.Error())
}
}()
return fn(ctx, pod)
}