teardown play kube

add the ability for play kube to tear down based on the yaml used to
play it.  it is indicated by --down in the play kube command.  volumes
are NOT deleted during the teardown.  pods and their containers are
stopped and removed.

Signed-off-by: Brent Baude <bbaude@redhat.com>

8 files changed, 176 insertions, 4 deletions

diff --git a/pkg/api/handlers/libpod/play.go b/pkg/api/handlers/libpod/play.go
index 90332924c..4f79d5f20 100644
--- a/pkg/api/handlers/libpod/play.go
+++ b/pkg/api/handlers/libpod/play.go
@@ -15,6 +15,7 @@ import (
 	"github.com/containers/podman/v3/pkg/domain/infra/abi"
 	"github.com/gorilla/schema"
 	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
 )
 
 func PlayKube(w http.ResponseWriter, r *http.Request) {
@@ -66,9 +67,15 @@ func PlayKube(w http.ResponseWriter, r *http.Request) {
 		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to create tempfile"))
 		return
 	}
-	defer os.Remove(tmpfile.Name())
+	defer func() {
+		if err := os.Remove(tmpfile.Name()); err != nil {
+			logrus.Warn(err)
+		}
+	}()
 	if _, err := io.Copy(tmpfile, r.Body); err != nil && err != io.EOF {
-		tmpfile.Close()
+		if err := tmpfile.Close(); err != nil {
+			logrus.Warn(err)
+		}
 		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to write archive to temporary file"))
 		return
 	}
@@ -105,12 +112,43 @@ func PlayKube(w http.ResponseWriter, r *http.Request) {
 	if _, found := r.URL.Query()["start"]; found {
 		options.Start = types.NewOptionalBool(query.Start)
 	}
-
 	report, err := containerEngine.PlayKube(r.Context(), tmpfile.Name(), options)
 	if err != nil {
 		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "error playing YAML file"))
 		return
 	}
+	utils.WriteResponse(w, http.StatusOK, report)
+}
 
+func PlayKubeDown(w http.ResponseWriter, r *http.Request) {
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	tmpfile, err := ioutil.TempFile("", "libpod-play-kube.yml")
+	if err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to create tempfile"))
+		return
+	}
+	defer func() {
+		if err := os.Remove(tmpfile.Name()); err != nil {
+			logrus.Warn(err)
+		}
+	}()
+	if _, err := io.Copy(tmpfile, r.Body); err != nil && err != io.EOF {
+		if err := tmpfile.Close(); err != nil {
+			logrus.Warn(err)
+		}
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to write archive to temporary file"))
+		return
+	}
+	if err := tmpfile.Close(); err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "error closing temporary file"))
+		return
+	}
+	containerEngine := abi.ContainerEngine{Libpod: runtime}
+	options := new(entities.PlayKubeDownOptions)
+	report, err := containerEngine.PlayKubeDown(r.Context(), tmpfile.Name(), *options)
+	if err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "error tearing down YAML file"))
+		return
+	}
 	utils.WriteResponse(w, http.StatusOK, report)
 }
diff --git a/pkg/api/server/register_play.go b/pkg/api/server/register_play.go
index c51301aa8..915d0d02e 100644
--- a/pkg/api/server/register_play.go
+++ b/pkg/api/server/register_play.go
@@ -59,5 +59,20 @@ func (s *APIServer) registerPlayHandlers(r *mux.Router) error {
 	//   500:
 	//     $ref: "#/responses/InternalError"
 	r.HandleFunc(VersionedPath("/libpod/play/kube"), s.APIHandler(libpod.PlayKube)).Methods(http.MethodPost)
+	// swagger:operation DELETE /libpod/play/kube libpod PlayKubeDownLibpod
+	// ---
+	// tags:
+	//  - containers
+	//  - pods
+	// summary: Remove pods from play kube
+	// description: Tears down pods defined in a YAML file
+	// produces:
+	// - application/json
+	// responses:
+	//   200:
+	//     $ref: "#/responses/DocsLibpodPlayKubeResponse"
+	//   500:
+	//     $ref: "#/responses/InternalError"
+	r.HandleFunc(VersionedPath("/libpod/play/kube"), s.APIHandler(libpod.PlayKubeDown)).Methods(http.MethodDelete)
 	return nil
 }
diff --git a/pkg/bindings/play/play.go b/pkg/bindings/play/play.go
index 4b735c821..a45508fed 100644
--- a/pkg/bindings/play/play.go
+++ b/pkg/bindings/play/play.go
@@ -6,6 +6,8 @@ import (
 	"os"
 	"strconv"
 
+	"github.com/sirupsen/logrus"
+
 	"github.com/containers/podman/v3/pkg/auth"
 	"github.com/containers/podman/v3/pkg/bindings"
 	"github.com/containers/podman/v3/pkg/domain/entities"
@@ -54,3 +56,30 @@ func Kube(ctx context.Context, path string, options *KubeOptions) (*entities.Pla
 
 	return &report, nil
 }
+
+func KubeDown(ctx context.Context, path string) (*entities.PlayKubeReport, error) {
+	var report entities.PlayKubeReport
+	conn, err := bindings.GetClient(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	f, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		if err := f.Close(); err != nil {
+			logrus.Warn(err)
+		}
+	}()
+	response, err := conn.DoRequest(f, http.MethodDelete, "/play/kube", nil, nil)
+	if err != nil {
+		return nil, err
+	}
+	if err := response.Process(&report); err != nil {
+		return nil, err
+	}
+
+	return &report, nil
+}
diff --git a/pkg/bindings/play/types.go b/pkg/bindings/play/types.go
index 52a72c7b6..787069169 100644
--- a/pkg/bindings/play/types.go
+++ b/pkg/bindings/play/types.go
@@ -1,6 +1,8 @@
 package play
 
-import "net"
+import (
+	"net"
+)
 
 //go:generate go run ../generator/generator.go KubeOptions
 // KubeOptions are optional options for replaying kube YAML files
diff --git a/pkg/domain/entities/engine_container.go b/pkg/domain/entities/engine_container.go
index 5d3c9480e..5acf7211c 100644
--- a/pkg/domain/entities/engine_container.go
+++ b/pkg/domain/entities/engine_container.go
@@ -67,6 +67,7 @@ type ContainerEngine interface {
 	NetworkReload(ctx context.Context, names []string, options NetworkReloadOptions) ([]*NetworkReloadReport, error)
 	NetworkRm(ctx context.Context, namesOrIds []string, options NetworkRmOptions) ([]*NetworkRmReport, error)
 	PlayKube(ctx context.Context, path string, opts PlayKubeOptions) (*PlayKubeReport, error)
+	PlayKubeDown(ctx context.Context, path string, opts PlayKubeDownOptions) (*PlayKubeReport, error)
 	PodCreate(ctx context.Context, opts PodCreateOptions) (*PodCreateReport, error)
 	PodExists(ctx context.Context, nameOrID string) (*BoolReport, error)
 	PodInspect(ctx context.Context, options PodInspectOptions) (*PodInspectReport, error)
diff --git a/pkg/domain/entities/play.go b/pkg/domain/entities/play.go
index 01de73ebe..77329e328 100644
--- a/pkg/domain/entities/play.go
+++ b/pkg/domain/entities/play.go
@@ -14,6 +14,9 @@ type PlayKubeOptions struct {
 	Build bool
 	// CertDir - to a directory containing TLS certifications and keys.
 	CertDir string
+	// Down indicates whether to bring contents of a yaml file "down"
+	// as in stop
+	Down bool
 	// Username for authenticating against the registry.
 	Username string
 	// Password for authenticating against the registry.
@@ -67,4 +70,14 @@ type PlayKubeReport struct {
 	Pods []PlayKubePod
 	// Volumes - volumes created by play kube.
 	Volumes []PlayKubeVolume
+	PlayKubeTeardown
+}
+
+// PlayKubeDownOptions are options for tearing down pods
+type PlayKubeDownOptions struct{}
+
+// PlayKubeDownReport contains the results of tearing down play kube
+type PlayKubeTeardown struct {
+	StopReport []*PodStopReport
+	RmReport   []*PodRmReport
 }
diff --git a/pkg/domain/infra/abi/play.go b/pkg/domain/infra/abi/play.go
index 6224feff5..f22b2dbbb 100644
--- a/pkg/domain/infra/abi/play.go
+++ b/pkg/domain/infra/abi/play.go
@@ -586,3 +586,73 @@ func getBuildFile(imageName string, cwd string) (string, error) {
 	}
 	return "", err
 }
+
+func (ic *ContainerEngine) PlayKubeDown(ctx context.Context, path string, _ entities.PlayKubeDownOptions) (*entities.PlayKubeReport, error) {
+	var (
+		podNames []string
+	)
+	reports := new(entities.PlayKubeReport)
+
+	// read yaml document
+	content, err := ioutil.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	// split yaml document
+	documentList, err := splitMultiDocYAML(content)
+	if err != nil {
+		return nil, err
+	}
+
+	// sort kube kinds
+	documentList, err = sortKubeKinds(documentList)
+	if err != nil {
+		return nil, errors.Wrapf(err, "unable to sort kube kinds in %q", path)
+	}
+
+	for _, document := range documentList {
+		kind, err := getKubeKind(document)
+		if err != nil {
+			return nil, errors.Wrapf(err, "unable to read %q as kube YAML", path)
+		}
+
+		switch kind {
+		case "Pod":
+			var podYAML v1.Pod
+			if err := yaml.Unmarshal(document, &podYAML); err != nil {
+				return nil, errors.Wrapf(err, "unable to read YAML %q as Kube Pod", path)
+			}
+			podNames = append(podNames, podYAML.ObjectMeta.Name)
+		case "Deployment":
+			var deploymentYAML v1apps.Deployment
+
+			if err := yaml.Unmarshal(document, &deploymentYAML); err != nil {
+				return nil, errors.Wrapf(err, "unable to read YAML %q as Kube Deployment", path)
+			}
+			var numReplicas int32 = 1
+			deploymentName := deploymentYAML.ObjectMeta.Name
+			if deploymentYAML.Spec.Replicas != nil {
+				numReplicas = *deploymentYAML.Spec.Replicas
+			}
+			for i := 0; i < int(numReplicas); i++ {
+				podName := fmt.Sprintf("%s-pod-%d", deploymentName, i)
+				podNames = append(podNames, podName)
+			}
+		default:
+			continue
+		}
+	}
+
+	// Add the reports
+	reports.StopReport, err = ic.PodStop(ctx, podNames, entities.PodStopOptions{})
+	if err != nil {
+		return nil, err
+	}
+
+	reports.RmReport, err = ic.PodRm(ctx, podNames, entities.PodRmOptions{})
+	if err != nil {
+		return nil, err
+	}
+	return reports, nil
+}
diff --git a/pkg/domain/infra/tunnel/play.go b/pkg/domain/infra/tunnel/play.go
index e66ff0308..e39751a18 100644
--- a/pkg/domain/infra/tunnel/play.go
+++ b/pkg/domain/infra/tunnel/play.go
@@ -22,3 +22,7 @@ func (ic *ContainerEngine) PlayKube(ctx context.Context, path string, opts entit
 	}
 	return play.Kube(ic.ClientCtx, path, options)
 }
+
+func (ic *ContainerEngine) PlayKubeDown(ctx context.Context, path string, _ entities.PlayKubeDownOptions) (*entities.PlayKubeReport, error) {
+	return play.KubeDown(ic.ClientCtx, path)
+}