03d11bcf4e
Add a new docker integration with kubelet using the new runtime API. This change adds the package with some skeletons, and implements some of the basic operations.
92 lines
2.5 KiB
Go
92 lines
2.5 KiB
Go
/*
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Copyright 2016 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 dockershim
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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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runtimeApi "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
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)
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// This file contains helper functions to convert docker API types to runtime
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// API types, or vice versa.
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const (
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// Status of a container returned by docker ListContainers
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statusRunningPrefix = "Up"
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statusCreatedPrefix = "Created"
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statusExitedPrefix = "Exited"
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)
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func toRuntimeAPIImage(image *dockertypes.Image) (*runtimeApi.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 API image")
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}
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size := uint64(image.VirtualSize)
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return &runtimeApi.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_: &size,
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}, nil
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}
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func toRuntimeAPIContainer(c *dockertypes.Container) *runtimeApi.Container {
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state := toRuntimeAPIContainerState(c.Status)
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return &runtimeApi.Container{
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Id: &c.ID,
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Name: &c.Names[0],
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Image: &runtimeApi.ImageSpec{Image: &c.Image},
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ImageRef: &c.ImageID,
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State: &state,
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Labels: c.Labels,
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}
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}
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func toDockerContainerStatus(state runtimeApi.ContainerState) string {
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switch state {
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case runtimeApi.ContainerState_CREATED:
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return "created"
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case runtimeApi.ContainerState_RUNNING:
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return "running"
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case runtimeApi.ContainerState_EXITED:
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return "exited"
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case runtimeApi.ContainerState_UNKNOWN:
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fallthrough
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default:
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return "unknown"
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}
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}
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func toRuntimeAPIContainerState(state string) runtimeApi.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 runtimeApi.ContainerState_RUNNING
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case strings.HasPrefix(state, statusExitedPrefix):
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return runtimeApi.ContainerState_EXITED
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case strings.HasPrefix(state, statusCreatedPrefix):
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return runtimeApi.ContainerState_CREATED
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default:
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return runtimeApi.ContainerState_UNKNOWN
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}
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}
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