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protect.go
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protect.go
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package environment
import (
"context"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
dclient "github.com/docker/docker/client"
"github.com/stretchr/testify/require"
)
var frozenImages = []string{"busybox:latest", "hello-world:frozen", "debian:jessie"}
type protectedElements struct {
containers map[string]struct{}
images map[string]struct{}
networks map[string]struct{}
plugins map[string]struct{}
volumes map[string]struct{}
}
func newProtectedElements() protectedElements {
return protectedElements{
containers: map[string]struct{}{},
images: map[string]struct{}{},
networks: map[string]struct{}{},
plugins: map[string]struct{}{},
volumes: map[string]struct{}{},
}
}
// ProtectAll protects the existing environment (containers, images, networks,
// volumes, and, on Linux, plugins) from being cleaned up at the end of test
// runs
func ProtectAll(t testingT, testEnv *Execution) {
ProtectContainers(t, testEnv)
ProtectImages(t, testEnv)
ProtectNetworks(t, testEnv)
ProtectVolumes(t, testEnv)
if testEnv.OSType == "linux" {
ProtectPlugins(t, testEnv)
}
}
// ProtectContainer adds the specified container(s) to be protected in case of
// clean
func (e *Execution) ProtectContainer(t testingT, containers ...string) {
for _, container := range containers {
e.protectedElements.containers[container] = struct{}{}
}
}
// ProtectContainers protects existing containers from being cleaned up at the
// end of test runs
func ProtectContainers(t testingT, testEnv *Execution) {
containers := getExistingContainers(t, testEnv)
testEnv.ProtectContainer(t, containers...)
}
func getExistingContainers(t require.TestingT, testEnv *Execution) []string {
client := testEnv.APIClient()
containerList, err := client.ContainerList(context.Background(), types.ContainerListOptions{
All: true,
})
require.NoError(t, err, "failed to list containers")
containers := []string{}
for _, container := range containerList {
containers = append(containers, container.ID)
}
return containers
}
// ProtectImage adds the specified image(s) to be protected in case of clean
func (e *Execution) ProtectImage(t testingT, images ...string) {
for _, image := range images {
e.protectedElements.images[image] = struct{}{}
}
}
// ProtectImages protects existing images and on linux frozen images from being
// cleaned up at the end of test runs
func ProtectImages(t testingT, testEnv *Execution) {
images := getExistingImages(t, testEnv)
if testEnv.OSType == "linux" {
images = append(images, frozenImages...)
}
testEnv.ProtectImage(t, images...)
}
func getExistingImages(t require.TestingT, testEnv *Execution) []string {
client := testEnv.APIClient()
filter := filters.NewArgs()
filter.Add("dangling", "false")
imageList, err := client.ImageList(context.Background(), types.ImageListOptions{
All: true,
Filters: filter,
})
require.NoError(t, err, "failed to list images")
images := []string{}
for _, image := range imageList {
images = append(images, tagsFromImageSummary(image)...)
}
return images
}
func tagsFromImageSummary(image types.ImageSummary) []string {
result := []string{}
for _, tag := range image.RepoTags {
if tag != "<none>:<none>" {
result = append(result, tag)
}
}
for _, digest := range image.RepoDigests {
if digest != "<none>@<none>" {
result = append(result, digest)
}
}
return result
}
// ProtectNetwork adds the specified network(s) to be protected in case of
// clean
func (e *Execution) ProtectNetwork(t testingT, networks ...string) {
for _, network := range networks {
e.protectedElements.networks[network] = struct{}{}
}
}
// ProtectNetworks protects existing networks from being cleaned up at the end
// of test runs
func ProtectNetworks(t testingT, testEnv *Execution) {
networks := getExistingNetworks(t, testEnv)
testEnv.ProtectNetwork(t, networks...)
}
func getExistingNetworks(t require.TestingT, testEnv *Execution) []string {
client := testEnv.APIClient()
networkList, err := client.NetworkList(context.Background(), types.NetworkListOptions{})
require.NoError(t, err, "failed to list networks")
networks := []string{}
for _, network := range networkList {
networks = append(networks, network.ID)
}
return networks
}
// ProtectPlugin adds the specified plugin(s) to be protected in case of clean
func (e *Execution) ProtectPlugin(t testingT, plugins ...string) {
for _, plugin := range plugins {
e.protectedElements.plugins[plugin] = struct{}{}
}
}
// ProtectPlugins protects existing plugins from being cleaned up at the end of
// test runs
func ProtectPlugins(t testingT, testEnv *Execution) {
plugins := getExistingPlugins(t, testEnv)
testEnv.ProtectPlugin(t, plugins...)
}
func getExistingPlugins(t require.TestingT, testEnv *Execution) []string {
client := testEnv.APIClient()
pluginList, err := client.PluginList(context.Background(), filters.Args{})
// Docker EE does not allow cluster-wide plugin management.
if dclient.IsErrNotImplemented(err) {
return []string{}
}
require.NoError(t, err, "failed to list plugins")
plugins := []string{}
for _, plugin := range pluginList {
plugins = append(plugins, plugin.Name)
}
return plugins
}
// ProtectVolume adds the specified volume(s) to be protected in case of clean
func (e *Execution) ProtectVolume(t testingT, volumes ...string) {
for _, volume := range volumes {
e.protectedElements.volumes[volume] = struct{}{}
}
}
// ProtectVolumes protects existing volumes from being cleaned up at the end of
// test runs
func ProtectVolumes(t testingT, testEnv *Execution) {
volumes := getExistingVolumes(t, testEnv)
testEnv.ProtectVolume(t, volumes...)
}
func getExistingVolumes(t require.TestingT, testEnv *Execution) []string {
client := testEnv.APIClient()
volumeList, err := client.VolumeList(context.Background(), filters.Args{})
require.NoError(t, err, "failed to list volumes")
volumes := []string{}
for _, volume := range volumeList.Volumes {
volumes = append(volumes, volume.Name)
}
return volumes
}