Initial commit on compatible API

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Create service command

Use cd cmd/service && go build .

$ systemd-socket-activate -l 8081 cmd/service/service &
$ curl http://localhost:8081/v1.24/images/json

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Correct Makefile

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Two more stragglers

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Report errors back as http headers

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Split out handlers, updated output

Output aligned to docker structures

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Refactored routing, added more endpoints and types

* Encapsulated all the routing information in the handler_* files.
* Added more serviceapi/types, including podman additions. See Info

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Cleaned up code, implemented info content

* Move Content-Type check into serviceHandler
* Custom 404 handler showing the url, mostly for debugging
* Refactored images: better method names and explicit http codes
* Added content to /info
* Added podman fields to Info struct
* Added Container struct

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Add a bunch of endpoints

containers: stop, pause, unpause, wait, rm
images: tag, rmi, create (pull only)

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

Add even more handlers

* Add serviceapi/Error() to improve error handling
* Better support for API return payloads
* Renamed unimplemented to unsupported these are generic endpoints
  we don't intend to ever support.  Swarm broken out since it uses
  different HTTP codes to signal that the node is not in a swarm.
* Added more types
* API Version broken out so it can be validated in the future

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Refactor to introduce ServiceWriter

Signed-off-by: Jhon Honce <jhonce@redhat.com>

populate pods endpoints

/libpod/pods/..

exists, kill, pause, prune, restart, remove, start, stop, unpause

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

Add components to Version, fix Error body

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Add images pull output, fix swarm routes

* docker-py tests/integration/api_client_test.py pass 100%
* docker-py tests/integration/api_image_test.py pass 4/16
+ Test failures include services podman does not support

Signed-off-by: Jhon Honce <jhonce@redhat.com>

pods endpoint submission 2

add create and others; only top and stats is left.

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

Update pull image to work from empty registry

Signed-off-by: Jhon Honce <jhonce@redhat.com>

pod create and container create

first pass at pod and container create.  the container create does not
quite work yet but it is very close.  pod create needs a partial
rewrite.  also broken off the DELETE (rm/rmi) to specific handler funcs.

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

Add docker-py demos, GET .../containers/json

* Update serviceapi/types to reflect libpod not podman
* Refactored removeImage() to provide non-streaming return

Signed-off-by: Jhon Honce <jhonce@redhat.com>

create container part2

finished minimal config needed for create container.  started demo.py
for upcoming talk

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

Stop server after honoring request

* Remove casting for method calls
* Improve WriteResponse()
* Update Container API type to match docker API

Signed-off-by: Jhon Honce <jhonce@redhat.com>

fix namespace assumptions

cleaned up namespace issues with libpod.

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

wip

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

Add sliding window when shutting down server

* Added a Timeout rather than closing down service on each call
* Added gorilla/schema dependency for Decode'ing query parameters
* Improved error handling
* Container logs returned and multiplexed for stdout and stderr
  * .../containers/{name}/logs?stdout=True&stderr=True
* Container stats
  * .../containers/{name}/stats

Signed-off-by: Jhon Honce <jhonce@redhat.com>

Improve error handling

* Add check for at least one std stream required for /containers/{id}/logs
* Add check for state in /containers/{id}/top
* Fill in more fields for /info
* Fixed error checking in service start code

Signed-off-by: Jhon Honce <jhonce@redhat.com>

get rest  of image tests for pass

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

linting our content

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

more linting

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

more linting

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

pruning

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

[CI:DOCS]apiv2 pods

migrate from using args in the url to using a json struct in body for
pod create.

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

fix handler_images prune

prune's api changed slightly to deal with filters.

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

[CI:DOCS]enabled base container create tests

enabling the base container create tests which allow us to get more into
the stop, kill, etc tests. many new tests now pass.

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

serviceapi errors: append error message to API message

I dearly hope this is not breaking any other tests but debugging
"Internal Server Error" is not helpful to any user.  In case, it
breaks tests, we can rever the commit - that's why it's a small one.

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

serviceAPI: add containers/prune endpoint

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

add `service` make target

Also remove the non-functional sub-Makefile.

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

add make targets for testing the service

 * `sudo make run-service` for running the service.

 * `DOCKERPY_TEST="tests/integration/api_container_test.py::ListContainersTest" \
 	make run-docker-py-tests`
   for running a specific tests.  Run all tests by leaving the env
   variable empty.

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

Split handlers and server packages

The files were split to help contain bloat. The api/server package will
contain all code related to the functioning of the server while
api/handlers will have all the code related to implementing the end
points.

api/server/register_* will contain the methods for registering
endpoints.  Additionally, they will have the comments for generating the
swagger spec file.

See api/handlers/version.go for a small example handler,
api/handlers/containers.go contains much more complex handlers.

Signed-off-by: Jhon Honce <jhonce@redhat.com>

[CI:DOCS]enabled more tests

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

[CI:DOCS]libpod endpoints

small refactor for libpod inclusion and began adding endpoints.

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

Implement /build and /events

* Include crypto libraries for future ssh work

Signed-off-by: Jhon Honce <jhonce@redhat.com>

[CI:DOCS]more image implementations

convert from using for to query structs among other changes including
new endpoints.

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

[CI:DOCS]add bindings for golang

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

[CI:DOCS]add volume endpoints for libpod

create, inspect, ls, prune, and rm

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

[CI:DOCS]apiv2 healthcheck enablement

wire up container healthchecks for the api.

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

[CI:DOCS]Add mount endpoints

via the api, allow ability to mount a container and list container
mounts.

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

[CI:DOCS]Add search endpoint

add search endpoint with golang bindings

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

[CI:DOCS]more apiv2 development

misc population of methods, etc

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

rebase cleanup and epoch reset

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

[CI:DOCS]add more network endpoints

also, add some initial error handling and convenience functions for
standard endpoints.

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

[CI:DOCS]use helper funcs for bindings

use the methods developed to make writing bindings less duplicative and
easier to use.

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

[CI:DOCS]add return info for prereview

begin to add return info and status codes for errors so that we can
review the apiv2

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

[CI:DOCS]first pass at adding swagger docs for api

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

4 files changed, 265 insertions, 0 deletions

diff --git a/pkg/api/handlers/utils/containers.go b/pkg/api/handlers/utils/containers.go
new file mode 100644
index 000000000..64d3d378a
--- /dev/null
+++ b/pkg/api/handlers/utils/containers.go
@@ -0,0 +1,103 @@
+package utils
+
+import (
+	"fmt"
+	"net/http"
+	"syscall"
+	"time"
+
+	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/libpod/define"
+	"github.com/gorilla/mux"
+	"github.com/gorilla/schema"
+	"github.com/pkg/errors"
+)
+
+func KillContainer(w http.ResponseWriter, r *http.Request) (*libpod.Container, error) {
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	decoder := r.Context().Value("decorder").(*schema.Decoder)
+	query := struct {
+		Signal syscall.Signal `schema:"signal"`
+	}{
+		Signal: syscall.SIGKILL,
+	}
+	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+		Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "Failed to parse parameters for %s", r.URL.String()))
+		return nil, err
+	}
+	name := mux.Vars(r)["name"]
+	con, err := runtime.LookupContainer(name)
+	if err != nil {
+		ContainerNotFound(w, name, err)
+		return nil, err
+	}
+
+	state, err := con.State()
+	if err != nil {
+		InternalServerError(w, err)
+		return con, err
+	}
+
+	// If the Container is stopped already, send a 409
+	if state == define.ContainerStateStopped || state == define.ContainerStateExited {
+		Error(w, fmt.Sprintf("Container %s is not running", name), http.StatusConflict, errors.New(fmt.Sprintf("Cannot kill Container %s, it is not running", name)))
+		return con, err
+	}
+
+	err = con.Kill(uint(query.Signal))
+	if err != nil {
+		Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrapf(err, "unable to kill Container %s", name))
+	}
+	return con, err
+}
+
+func RemoveContainer(w http.ResponseWriter, r *http.Request, force, vols bool) {
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	name := mux.Vars(r)["name"]
+	con, err := runtime.LookupContainer(name)
+	if err != nil {
+		ContainerNotFound(w, name, err)
+		return
+	}
+
+	if err := runtime.RemoveContainer(r.Context(), con, force, vols); err != nil {
+		InternalServerError(w, err)
+		return
+	}
+	WriteResponse(w, http.StatusNoContent, "")
+}
+
+func WaitContainer(w http.ResponseWriter, r *http.Request) (int32, error) {
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	decoder := r.Context().Value("decoder").(*schema.Decoder)
+	// /{version}/containers/(name)/restart
+	query := struct {
+		Interval  string `schema:"interval"`
+		Condition string `schema:"condition"`
+	}{
+		// Override golang default values for types
+	}
+	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+		Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "Failed to parse parameters for %s", r.URL.String()))
+		return 0, err
+	}
+
+	if len(query.Condition) > 0 {
+		return 0, errors.Errorf("the condition parameter is not supported")
+	}
+
+	name := mux.Vars(r)["name"]
+	con, err := runtime.LookupContainer(name)
+	if err != nil {
+		ContainerNotFound(w, name, err)
+		return 0, err
+	}
+	if len(query.Interval) > 0 {
+		d, err := time.ParseDuration(query.Interval)
+		if err != nil {
+			Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "Failed to parse %s for interval", query.Interval))
+		}
+		return con.WaitWithInterval(d)
+	}
+	return con.Wait()
+}
diff --git a/pkg/api/handlers/utils/errors.go b/pkg/api/handlers/utils/errors.go
new file mode 100644
index 000000000..69d4e40f8
--- /dev/null
+++ b/pkg/api/handlers/utils/errors.go
@@ -0,0 +1,86 @@
+package utils
+
+import (
+	"fmt"
+	"github.com/containers/libpod/libpod/define"
+	"net/http"
+
+	"github.com/pkg/errors"
+	log "github.com/sirupsen/logrus"
+)
+
+var (
+	ErrLinkNotSupport = errors.New("Link is not supported")
+)
+
+// Error formats an API response to an error
+//
+// apiMessage and code must match the container API, and are sent to client
+// err is logged on the system running the podman service
+func Error(w http.ResponseWriter, apiMessage string, code int, err error) {
+	// Log detailed message of what happened to machine running podman service
+	log.Infof("Request Failed(%s): %s", http.StatusText(code), err.Error())
+	em := ErrorModel{
+		Because: (errors.Cause(err)).Error(),
+		Message: err.Error(),
+	}
+	WriteJSON(w, code, em)
+}
+
+func VolumeNotFound(w http.ResponseWriter, nameOrId string, err error) {
+	if errors.Cause(err) != define.ErrNoSuchVolume {
+		InternalServerError(w, err)
+	}
+	msg := fmt.Sprintf("No such volume: %s", nameOrId)
+	Error(w, msg, http.StatusNotFound, err)
+}
+func ContainerNotFound(w http.ResponseWriter, nameOrId string, err error) {
+	if errors.Cause(err) != define.ErrNoSuchCtr {
+		InternalServerError(w, err)
+	}
+	msg := fmt.Sprintf("No such container: %s", nameOrId)
+	Error(w, msg, http.StatusNotFound, err)
+}
+
+func ImageNotFound(w http.ResponseWriter, nameOrId string, err error) {
+	if errors.Cause(err) != define.ErrNoSuchImage {
+		InternalServerError(w, err)
+	}
+	msg := fmt.Sprintf("No such image: %s", nameOrId)
+	Error(w, msg, http.StatusNotFound, err)
+}
+
+func PodNotFound(w http.ResponseWriter, nameOrId string, err error) {
+	if errors.Cause(err) != define.ErrNoSuchPod {
+		InternalServerError(w, err)
+	}
+	msg := fmt.Sprintf("No such pod: %s", nameOrId)
+	Error(w, msg, http.StatusNotFound, err)
+}
+
+func ContainerNotRunning(w http.ResponseWriter, containerID string, err error) {
+	msg := fmt.Sprintf("Container %s is not running", containerID)
+	Error(w, msg, http.StatusConflict, err)
+}
+
+func InternalServerError(w http.ResponseWriter, err error) {
+	Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError, err)
+}
+
+func BadRequest(w http.ResponseWriter, key string, value string, err error) {
+	e := errors.Wrapf(err, "Failed to parse query parameter '%s': %q", key, value)
+	Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest, e)
+}
+
+type ErrorModel struct {
+	Because string `json:"cause"`
+	Message string `json:"message"`
+}
+
+func (e ErrorModel) Error() string {
+	return e.Message
+}
+
+func (e ErrorModel) Cause() error {
+	return errors.New(e.Because)
+}
diff --git a/pkg/api/handlers/utils/handler.go b/pkg/api/handlers/utils/handler.go
new file mode 100644
index 000000000..0815e6eca
--- /dev/null
+++ b/pkg/api/handlers/utils/handler.go
@@ -0,0 +1,44 @@
+package utils
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// WriteResponse encodes the given value as JSON or string and renders it for http client
+func WriteResponse(w http.ResponseWriter, code int, value interface{}) {
+	switch value.(type) {
+	case string:
+		w.Header().Set("Content-Type", "text/plain; charset=us-ascii")
+		w.WriteHeader(code)
+
+		if _, err := fmt.Fprintln(w, value); err != nil {
+			log.Errorf("unable to send string response: %q", err)
+		}
+	case *os.File:
+		w.Header().Set("Content-Type", "application/octet; charset=us-ascii")
+		w.WriteHeader(code)
+
+		if _, err := io.Copy(w, value.(*os.File)); err != nil {
+			log.Errorf("unable to copy to response: %q", err)
+		}
+	default:
+		WriteJSON(w, code, value)
+	}
+}
+
+func WriteJSON(w http.ResponseWriter, code int, value interface{}) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(code)
+
+	coder := json.NewEncoder(w)
+	coder.SetEscapeHTML(true)
+	if err := coder.Encode(value); err != nil {
+		log.Errorf("unable to write json: %q", err)
+	}
+}
diff --git a/pkg/api/handlers/utils/images.go b/pkg/api/handlers/utils/images.go
new file mode 100644
index 000000000..9445298ca
--- /dev/null
+++ b/pkg/api/handlers/utils/images.go
@@ -0,0 +1,32 @@
+package utils
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/libpod/image"
+	"github.com/gorilla/schema"
+)
+
+// GetImages is a common function used to get images for libpod and other compatibility
+// mechanisms
+func GetImages(w http.ResponseWriter, r *http.Request) ([]*image.Image, error) {
+	decoder := r.Context().Value("decoder").(*schema.Decoder)
+	runtime := r.Context().Value("runtime").(*libpod.Runtime)
+	query := struct {
+		//all     bool # all is currently unused
+		filters []string
+		//digests bool # digests is currently unused
+	}{
+		// This is where you can override the golang default value for one of fields
+	}
+	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
+		return nil, err
+	}
+	filters := query.filters
+	if len(filters) < 1 {
+		filters = append(filters, fmt.Sprintf("reference=%s", ""))
+	}
+	return runtime.ImageRuntime().GetImagesWithFilters(filters)
+}