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registry.go
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registry.go
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// Copyright © 2019 Sparebanken Vest
//
// 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.
//
// Note: Code is based on bank-vaults from Banzai Cloud
// (https://github.com/banzaicloud/bank-vaults)
package main
import (
"context"
"github.com/SparebankenVest/azure-key-vault-to-kubernetes/pkg/docker/registry"
corev1 "k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/klog/v2"
)
func getContainerCmd(ctx context.Context, clientset kubernetes.Interface, container *corev1.Container, podSpec *corev1.PodSpec, namespace string, imageRegistry registry.ImageRegistry) ([]string, error) {
klog.V(4).InfoS("getting container command for container", "container", klog.KRef(namespace, container.Name))
cmd := container.Command
// If container.Command is set it will override both image.Entrypoint AND image.Cmd
// https://kubernetes.io/docs/tasks/inject-data-application/define-command-argument-container/#notes
if len(cmd) == 0 {
klog.V(4).InfoS("no cmd override in kubernetes for container, checking docker image configuration for entrypoint and cmd", "image", container.Image, "container", klog.KRef(namespace, container.Name))
containerImageInspectionCounter.Inc()
imgConfig, err := imageRegistry.GetImageConfig(ctx, clientset, namespace, container, podSpec, registry.ImageRegistryOptions{})
if err != nil {
containerImageInspectionFailures.Inc()
return nil, err
}
cmd = append(cmd, imgConfig.Entrypoint...)
if len(container.Args) == 0 {
cmd = append(cmd, imgConfig.Cmd...)
}
} else {
klog.V(4).InfoS("found cmd override in kubernetes for container, no need to inspect docker image configuration", "image", container.Image, "container", klog.KRef(namespace, container.Name))
}
cmd = append(cmd, container.Args...)
return cmd, nil
}