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-rw-r--r--pkg/api/handlers/compat/ping.go8
-rw-r--r--pkg/api/handlers/compat/version.go42
-rw-r--r--pkg/api/handlers/handler.go6
-rw-r--r--pkg/api/handlers/utils/handler.go86
-rw-r--r--pkg/api/handlers/utils/handler_test.go139
-rw-r--r--pkg/bindings/bindings.go7
-rw-r--r--pkg/bindings/connection.go17
-rw-r--r--pkg/bindings/version.go3
8 files changed, 272 insertions, 36 deletions
diff --git a/pkg/api/handlers/compat/ping.go b/pkg/api/handlers/compat/ping.go
index 6e77e270f..abee3d8e8 100644
--- a/pkg/api/handlers/compat/ping.go
+++ b/pkg/api/handlers/compat/ping.go
@@ -5,22 +5,22 @@ import (
"net/http"
"github.com/containers/buildah"
- "github.com/containers/libpod/pkg/api/handlers"
+ "github.com/containers/libpod/pkg/api/handlers/utils"
)
// Ping returns headers to client about the service
//
// This handler must always be the same for the compatibility and libpod URL trees!
// Clients will use the Header availability to test which backend engine is in use.
+// Note: Additionally handler supports GET and HEAD methods
func Ping(w http.ResponseWriter, r *http.Request) {
- w.Header().Set("API-Version", handlers.DefaultApiVersion)
+ w.Header().Set("API-Version", utils.ApiVersion[utils.CompatTree][utils.CurrentApiVersion].String())
w.Header().Set("BuildKit-Version", "")
w.Header().Set("Docker-Experimental", "true")
w.Header().Set("Cache-Control", "no-cache")
w.Header().Set("Pragma", "no-cache")
- // API-Version and Libpod-API-Version may not always be equal
- w.Header().Set("Libpod-API-Version", handlers.DefaultApiVersion)
+ w.Header().Set("Libpod-API-Version", utils.ApiVersion[utils.LibpodTree][utils.CurrentApiVersion].String())
w.Header().Set("Libpod-Buildha-Version", buildah.Version)
w.WriteHeader(http.StatusOK)
diff --git a/pkg/api/handlers/compat/version.go b/pkg/api/handlers/compat/version.go
index 8786f1d5b..bfc226bb8 100644
--- a/pkg/api/handlers/compat/version.go
+++ b/pkg/api/handlers/compat/version.go
@@ -8,7 +8,6 @@ import (
"github.com/containers/libpod/libpod"
"github.com/containers/libpod/libpod/define"
- "github.com/containers/libpod/pkg/api/handlers"
"github.com/containers/libpod/pkg/api/handlers/utils"
"github.com/containers/libpod/pkg/domain/entities"
docker "github.com/docker/docker/api/types"
@@ -35,34 +34,35 @@ func VersionHandler(w http.ResponseWriter, r *http.Request) {
Name: "Podman Engine",
Version: versionInfo.Version,
Details: map[string]string{
- "APIVersion": handlers.DefaultApiVersion,
+ "APIVersion": utils.ApiVersion[utils.LibpodTree][utils.CurrentApiVersion].String(),
"Arch": goRuntime.GOARCH,
"BuildTime": time.Unix(versionInfo.Built, 0).Format(time.RFC3339),
"Experimental": "true",
"GitCommit": versionInfo.GitCommit,
"GoVersion": versionInfo.GoVersion,
"KernelVersion": infoData.Host.Kernel,
- "MinAPIVersion": handlers.MinimalApiVersion,
+ "MinAPIVersion": utils.ApiVersion[utils.LibpodTree][utils.MinimalApiVersion].String(),
"Os": goRuntime.GOOS,
},
}}
- utils.WriteResponse(w, http.StatusOK, entities.ComponentVersion{Version: docker.Version{
- Platform: struct {
- Name string
- }{
- Name: fmt.Sprintf("%s/%s/%s-%s", goRuntime.GOOS, goRuntime.GOARCH, infoData.Host.Distribution.Distribution, infoData.Host.Distribution.Version),
- },
- APIVersion: components[0].Details["APIVersion"],
- Arch: components[0].Details["Arch"],
- BuildTime: components[0].Details["BuildTime"],
- Components: components,
- Experimental: true,
- GitCommit: components[0].Details["GitCommit"],
- GoVersion: components[0].Details["GoVersion"],
- KernelVersion: components[0].Details["KernelVersion"],
- MinAPIVersion: components[0].Details["MinAPIVersion"],
- Os: components[0].Details["Os"],
- Version: components[0].Version,
- }})
+ utils.WriteResponse(w, http.StatusOK, entities.ComponentVersion{
+ Version: docker.Version{
+ Platform: struct {
+ Name string
+ }{
+ Name: fmt.Sprintf("%s/%s/%s-%s", goRuntime.GOOS, goRuntime.GOARCH, infoData.Host.Distribution.Distribution, infoData.Host.Distribution.Version),
+ },
+ APIVersion: components[0].Details["APIVersion"],
+ Arch: components[0].Details["Arch"],
+ BuildTime: components[0].Details["BuildTime"],
+ Components: components,
+ Experimental: true,
+ GitCommit: components[0].Details["GitCommit"],
+ GoVersion: components[0].Details["GoVersion"],
+ KernelVersion: components[0].Details["KernelVersion"],
+ MinAPIVersion: components[0].Details["MinAPIVersion"],
+ Os: components[0].Details["Os"],
+ Version: components[0].Version,
+ }})
}
diff --git a/pkg/api/handlers/handler.go b/pkg/api/handlers/handler.go
deleted file mode 100644
index 2dd2c886b..000000000
--- a/pkg/api/handlers/handler.go
+++ /dev/null
@@ -1,6 +0,0 @@
-package handlers
-
-const (
- DefaultApiVersion = "1.40" // See https://docs.docker.com/engine/api/v1.40/
- MinimalApiVersion = "1.24"
-)
diff --git a/pkg/api/handlers/utils/handler.go b/pkg/api/handlers/utils/handler.go
index b5bd488fb..2f4a54b98 100644
--- a/pkg/api/handlers/utils/handler.go
+++ b/pkg/api/handlers/utils/handler.go
@@ -9,11 +9,55 @@ import (
"os"
"strings"
+ "github.com/blang/semver"
"github.com/gorilla/mux"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
+type (
+ // VersionTree determines which API endpoint tree for version
+ VersionTree int
+ // VersionLevel determines which API level, current or something from the past
+ VersionLevel int
+)
+
+const (
+ // LibpodTree supports Libpod endpoints
+ LibpodTree = VersionTree(iota)
+ // CompatTree supports Libpod endpoints
+ CompatTree
+
+ // CurrentApiVersion announces what is the current API level
+ CurrentApiVersion = VersionLevel(iota)
+ // MinimalApiVersion announces what is the oldest API level supported
+ MinimalApiVersion
+)
+
+var (
+ // See https://docs.docker.com/engine/api/v1.40/
+ // libpod compat handlers are expected to honor docker API versions
+
+ // ApiVersion provides the current and minimal API versions for compat and libpod endpoint trees
+ // Note: GET|HEAD /_ping is never versioned and provides the API-Version and Libpod-API-Version headers to allow
+ // clients to shop for the Version they wish to support
+ ApiVersion = map[VersionTree]map[VersionLevel]semver.Version{
+ LibpodTree: {
+ CurrentApiVersion: semver.MustParse("1.0.0"),
+ MinimalApiVersion: semver.MustParse("1.0.0"),
+ },
+ CompatTree: {
+ CurrentApiVersion: semver.MustParse("1.40.0"),
+ MinimalApiVersion: semver.MustParse("1.24.0"),
+ },
+ }
+
+ // ErrVersionNotGiven returned when version not given by client
+ ErrVersionNotGiven = errors.New("version not given in URL path")
+ // ErrVersionNotSupported returned when given version is too old
+ ErrVersionNotSupported = errors.New("given version is not supported")
+)
+
// IsLibpodRequest returns true if the request related to a libpod endpoint
// (e.g., /v2/libpod/...).
func IsLibpodRequest(r *http.Request) bool {
@@ -21,6 +65,48 @@ func IsLibpodRequest(r *http.Request) bool {
return len(split) >= 3 && split[2] == "libpod"
}
+// SupportedVersion validates that the version provided by client is included in the given condition
+// https://github.com/blang/semver#ranges provides the details for writing conditions
+// If a version is not given in URL path, ErrVersionNotGiven is returned
+func SupportedVersion(r *http.Request, condition string) (semver.Version, error) {
+ version := semver.Version{}
+ val, ok := mux.Vars(r)["version"]
+ if !ok {
+ return version, ErrVersionNotGiven
+ }
+ safeVal, err := url.PathUnescape(val)
+ if err != nil {
+ return version, errors.Wrapf(err, "unable to unescape given API version: %q", val)
+ }
+ version, err = semver.ParseTolerant(safeVal)
+ if err != nil {
+ return version, errors.Wrapf(err, "unable to parse given API version: %q from %q", safeVal, val)
+ }
+
+ inRange, err := semver.ParseRange(condition)
+ if err != nil {
+ return version, err
+ }
+
+ if inRange(version) {
+ return version, nil
+ }
+ return version, ErrVersionNotSupported
+}
+
+// SupportedVersionWithDefaults validates that the version provided by client valid is supported by server
+// minimal API version <= client path version <= maximum API version focused on the endpoint tree from URL
+func SupportedVersionWithDefaults(r *http.Request) (semver.Version, error) {
+ tree := CompatTree
+ if IsLibpodRequest(r) {
+ tree = LibpodTree
+ }
+
+ return SupportedVersion(r,
+ fmt.Sprintf(">=%s <=%s", ApiVersion[tree][MinimalApiVersion].String(),
+ ApiVersion[tree][CurrentApiVersion].String()))
+}
+
// WriteResponse encodes the given value as JSON or string and renders it for http client
func WriteResponse(w http.ResponseWriter, code int, value interface{}) {
// RFC2616 explicitly states that the following status codes "MUST NOT
diff --git a/pkg/api/handlers/utils/handler_test.go b/pkg/api/handlers/utils/handler_test.go
new file mode 100644
index 000000000..6009432b5
--- /dev/null
+++ b/pkg/api/handlers/utils/handler_test.go
@@ -0,0 +1,139 @@
+package utils
+
+import (
+ "errors"
+ "fmt"
+ "net/http"
+ "net/http/httptest"
+ "testing"
+
+ "github.com/gorilla/mux"
+)
+
+func TestSupportedVersion(t *testing.T) {
+ req, err := http.NewRequest("GET",
+ fmt.Sprintf("/v%s/libpod/testing/versions", ApiVersion[LibpodTree][CurrentApiVersion]),
+ nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ req = mux.SetURLVars(req, map[string]string{"version": ApiVersion[LibpodTree][CurrentApiVersion].String()})
+
+ rr := httptest.NewRecorder()
+ handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+ _, err := SupportedVersionWithDefaults(r)
+ switch {
+ case errors.Is(err, ErrVersionNotGiven): // for compat endpoints version optional
+ w.WriteHeader(http.StatusInternalServerError)
+ fmt.Fprint(w, err.Error())
+ case errors.Is(err, ErrVersionNotSupported): // version given but not supported
+ w.WriteHeader(http.StatusBadRequest)
+ fmt.Fprint(w, err.Error())
+ case err != nil:
+ w.WriteHeader(http.StatusInternalServerError)
+ fmt.Fprint(w, err.Error())
+ default: // all good
+ w.WriteHeader(http.StatusOK)
+ fmt.Fprint(w, "OK")
+ }
+ })
+ handler.ServeHTTP(rr, req)
+
+ if status := rr.Code; status != http.StatusOK {
+ t.Errorf("handler returned wrong status code: got %v want %v",
+ status, http.StatusOK)
+ }
+
+ // Check the response body is what we expect.
+ expected := `OK`
+ if rr.Body.String() != expected {
+ t.Errorf("handler returned unexpected body: got %q want %q",
+ rr.Body.String(), expected)
+ }
+}
+
+func TestUnsupportedVersion(t *testing.T) {
+ version := "999.999.999"
+ req, err := http.NewRequest("GET",
+ fmt.Sprintf("/v%s/libpod/testing/versions", version),
+ nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ req = mux.SetURLVars(req, map[string]string{"version": version})
+
+ rr := httptest.NewRecorder()
+ handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+ _, err := SupportedVersionWithDefaults(r)
+ switch {
+ case errors.Is(err, ErrVersionNotGiven): // for compat endpoints version optional
+ w.WriteHeader(http.StatusInternalServerError)
+ fmt.Fprint(w, err.Error())
+ case errors.Is(err, ErrVersionNotSupported): // version given but not supported
+ w.WriteHeader(http.StatusBadRequest)
+ fmt.Fprint(w, err.Error())
+ case err != nil:
+ w.WriteHeader(http.StatusInternalServerError)
+ fmt.Fprint(w, err.Error())
+ default: // all good
+ w.WriteHeader(http.StatusOK)
+ fmt.Fprint(w, "OK")
+ }
+ })
+ handler.ServeHTTP(rr, req)
+
+ if status := rr.Code; status != http.StatusBadRequest {
+ t.Errorf("handler returned wrong status code: got %v want %v",
+ status, http.StatusBadRequest)
+ }
+
+ // Check the response body is what we expect.
+ expected := ErrVersionNotSupported.Error()
+ if rr.Body.String() != expected {
+ t.Errorf("handler returned unexpected body: got %q want %q",
+ rr.Body.String(), expected)
+ }
+}
+
+func TestEqualVersion(t *testing.T) {
+ version := "1.30.0"
+ req, err := http.NewRequest("GET",
+ fmt.Sprintf("/v%s/libpod/testing/versions", version),
+ nil)
+ if err != nil {
+ t.Fatal(err)
+ }
+ req = mux.SetURLVars(req, map[string]string{"version": version})
+
+ rr := httptest.NewRecorder()
+ handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+ _, err := SupportedVersion(r, "=="+version)
+ switch {
+ case errors.Is(err, ErrVersionNotGiven): // for compat endpoints version optional
+ w.WriteHeader(http.StatusInternalServerError)
+ fmt.Fprint(w, err.Error())
+ case errors.Is(err, ErrVersionNotSupported): // version given but not supported
+ w.WriteHeader(http.StatusBadRequest)
+ fmt.Fprint(w, err.Error())
+ case err != nil:
+ w.WriteHeader(http.StatusInternalServerError)
+ fmt.Fprint(w, err.Error())
+ default: // all good
+ w.WriteHeader(http.StatusOK)
+ fmt.Fprint(w, "OK")
+ }
+ })
+ handler.ServeHTTP(rr, req)
+
+ if status := rr.Code; status != http.StatusOK {
+ t.Errorf("handler returned wrong status code: got %v want %v",
+ status, http.StatusOK)
+ }
+
+ // Check the response body is what we expect.
+ expected := http.StatusText(http.StatusOK)
+ if rr.Body.String() != expected {
+ t.Errorf("handler returned unexpected body: got %q want %q",
+ rr.Body.String(), expected)
+ }
+}
diff --git a/pkg/bindings/bindings.go b/pkg/bindings/bindings.go
index 5e2882aae..7e2a444bd 100644
--- a/pkg/bindings/bindings.go
+++ b/pkg/bindings/bindings.go
@@ -8,6 +8,10 @@
package bindings
+import (
+ "github.com/blang/semver"
+)
+
var (
// PTrue is a convenience variable that can be used in bindings where
// a pointer to a bool (optional parameter) is required.
@@ -17,4 +21,7 @@ var (
// a pointer to a bool (optional parameter) is required.
pFalse = false
PFalse = &pFalse
+
+ // _*YES*- podman will fail to run if this value is wrong
+ APIVersion = semver.MustParse("1.0.0")
)
diff --git a/pkg/bindings/connection.go b/pkg/bindings/connection.go
index d83c0482c..d21d55beb 100644
--- a/pkg/bindings/connection.go
+++ b/pkg/bindings/connection.go
@@ -15,6 +15,7 @@ import (
"strings"
"time"
+ "github.com/blang/semver"
"github.com/containers/libpod/pkg/api/types"
jsoniter "github.com/json-iterator/go"
"github.com/pkg/errors"
@@ -143,7 +144,7 @@ func tcpClient(_url *url.URL) (Connection, error) {
}
// pingNewConnection pings to make sure the RESTFUL service is up
-// and running. it should only be used where initializing a connection
+// and running. it should only be used when initializing a connection
func pingNewConnection(ctx context.Context) error {
client, err := GetClient(ctx)
if err != nil {
@@ -154,8 +155,20 @@ func pingNewConnection(ctx context.Context) error {
if err != nil {
return err
}
+
if response.StatusCode == http.StatusOK {
- return nil
+ v, err := semver.ParseTolerant(response.Header.Get("Libpod-API-Version"))
+ if err != nil {
+ return err
+ }
+
+ switch APIVersion.Compare(v) {
+ case 1, 0:
+ // Server's job when client version is equal or older
+ return nil
+ case -1:
+ return errors.Errorf("server API version is too old. client %q server %q", APIVersion.String(), v.String())
+ }
}
return errors.Errorf("ping response was %q", response.StatusCode)
}
diff --git a/pkg/bindings/version.go b/pkg/bindings/version.go
deleted file mode 100644
index c833a644c..000000000
--- a/pkg/bindings/version.go
+++ /dev/null
@@ -1,3 +0,0 @@
-package bindings
-
-func (c Connection) Version() {}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-20 13:16:12 +0000