84 lines
2.5 KiB
Go
84 lines
2.5 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package dockertools
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import (
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"fmt"
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"strings"
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dockertypes "github.com/docker/engine-api/types"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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)
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// This file contains helper functions to convert docker API types to runtime
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// (kubecontainer) types.
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const (
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statusRunningPrefix = "Up"
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statusExitedPrefix = "Exited"
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)
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func mapState(state string) kubecontainer.ContainerState {
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// Parse the state string in dockertypes.Container. This could break when
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// we upgrade docker.
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switch {
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case strings.HasPrefix(state, statusRunningPrefix):
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return kubecontainer.ContainerStateRunning
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case strings.HasPrefix(state, statusExitedPrefix):
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return kubecontainer.ContainerStateExited
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default:
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return kubecontainer.ContainerStateUnknown
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}
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}
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// Converts dockertypes.Container to kubecontainer.Container.
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func toRuntimeContainer(c *dockertypes.Container) (*kubecontainer.Container, error) {
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if c == nil {
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return nil, fmt.Errorf("unable to convert a nil pointer to a runtime container")
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}
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dockerName, hash, err := getDockerContainerNameInfo(c)
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if err != nil {
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return nil, err
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}
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return &kubecontainer.Container{
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ID: kubecontainer.DockerID(c.ID).ContainerID(),
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Name: dockerName.ContainerName,
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Image: c.Image,
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ImageID: c.ImageID,
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Hash: hash,
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// (random-liu) docker uses status to indicate whether a container is running or exited.
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// However, in kubernetes we usually use state to indicate whether a container is running or exited,
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// while use status to indicate the comprehensive status of the container. So we have different naming
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// norm here.
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State: mapState(c.Status),
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}, nil
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}
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// Converts dockertypes.Image to kubecontainer.Image.
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func toRuntimeImage(image *dockertypes.Image) (*kubecontainer.Image, error) {
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if image == nil {
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return nil, fmt.Errorf("unable to convert a nil pointer to a runtime image")
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}
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return &kubecontainer.Image{
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ID: image.ID,
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RepoTags: image.RepoTags,
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RepoDigests: image.RepoDigests,
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Size: image.VirtualSize,
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}, nil
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}
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