add {generate,play} kube

Add the `podman generate kube` and `podman play kube` command.  The code
has largely been copied from Podman v1 but restructured to not leak the
K8s core API into the (remote) client.

Both commands are added in the same commit to allow for enabling the
tests at the same time.

Move some exports from `cmd/podman/common` to the appropriate places in
the backend to avoid circular dependencies.

Move definitions of label annotations to `libpod/define` and set the
security-opt labels in the frontend to make kube tests pass.

Implement rest endpoints, bindings and the tunnel interface.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

2 files changed, 102 insertions, 0 deletions

diff --git a/pkg/api/handlers/libpod/generate.go b/pkg/api/handlers/libpod/generate.go
new file mode 100644
index 000000000..23320d346
--- /dev/null
+++ b/pkg/api/handlers/libpod/generate.go
@@ -0,0 +1,38 @@
+package libpod
+
+import (
+	"net/http"
+
+	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/pkg/api/handlers/utils"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/containers/libpod/pkg/domain/infra/abi"
+	"github.com/gorilla/schema"
+	"github.com/pkg/errors"
+)
+
+func GenerateKube(w http.ResponseWriter, r *http.Request) {
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	decoder := r.Context().Value("decoder").(*schema.Decoder)
+	query := struct {
+		Service bool `schema:"service"`
+	}{
+		// Defaults would go here.
+	}
+
+	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
+		return
+	}
+
+	containerEngine := abi.ContainerEngine{Libpod: runtime}
+	options := entities.GenerateKubeOptions{Service: query.Service}
+	report, err := containerEngine.GenerateKube(r.Context(), utils.GetName(r), options)
+	if err != nil {
+		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "error generating YAML"))
+		return
+	}
+
+	utils.WriteResponse(w, http.StatusOK, report.Reader)
+}
diff --git a/pkg/api/handlers/libpod/play.go b/pkg/api/handlers/libpod/play.go
new file mode 100644
index 000000000..26e02bf4f
--- /dev/null
+++ b/pkg/api/handlers/libpod/play.go
@@ -0,0 +1,64 @@
+package libpod
+
+import (
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+
+	"github.com/containers/image/v5/types"
+	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/pkg/api/handlers/utils"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/containers/libpod/pkg/domain/infra/abi"
+	"github.com/gorilla/schema"
+	"github.com/pkg/errors"
+)
+
+func PlayKube(w http.ResponseWriter, r *http.Request) {
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	decoder := r.Context().Value("decoder").(*schema.Decoder)
+	query := struct {
+		Network   string `schema:"reference"`
+		TLSVerify bool   `schema:"tlsVerify"`
+	}{
+		TLSVerify: true,
+	}
+
+	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
+			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
+		return
+	}
+
+	// Fetch the K8s YAML file from the body, and copy it to a temp file.
+	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 os.Remove(tmpfile.Name())
+	if _, err := io.Copy(tmpfile, r.Body); err != nil && err != io.EOF {
+		tmpfile.Close()
+		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 := entities.PlayKubeOptions{Network: query.Network, Quiet: true}
+	if _, found := r.URL.Query()["tlsVerify"]; found {
+		options.SkipTLSVerify = types.NewOptionalBool(!query.TLSVerify)
+	}
+
+	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)
+}