Move CRI from pkg/ to internal/

Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>

internal/cri/server/streaming.go

@@ -0,0 +1,103 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package server
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"math"
+
+	"k8s.io/apimachinery/pkg/util/runtime"
+	"k8s.io/client-go/tools/remotecommand"
+	"k8s.io/utils/exec"
+
+	ctrdutil "github.com/containerd/containerd/v2/internal/cri/util"
+	"k8s.io/kubelet/pkg/cri/streaming"
+)
+
+type streamRuntime struct {
+	c *criService
+}
+
+func newStreamRuntime(c *criService) streaming.Runtime {
+	return &streamRuntime{c: c}
+}
+
+// Exec executes a command inside the container. exec.ExitError is returned if the command
+// returns non-zero exit code.
+func (s *streamRuntime) Exec(ctx context.Context, containerID string, cmd []string, stdin io.Reader, stdout, stderr io.WriteCloser,
+	tty bool, resize <-chan remotecommand.TerminalSize) error {
+	exitCode, err := s.c.execInContainer(ctrdutil.WithNamespace(ctx), containerID, execOptions{
+		cmd:    cmd,
+		stdin:  stdin,
+		stdout: stdout,
+		stderr: stderr,
+		tty:    tty,
+		resize: resize,
+	})
+	if err != nil {
+		return fmt.Errorf("failed to exec in container: %w", err)
+	}
+	if *exitCode == 0 {
+		return nil
+	}
+	return &exec.CodeExitError{
+		Err:  fmt.Errorf("error executing command %v, exit code %d", cmd, *exitCode),
+		Code: int(*exitCode),
+	}
+}
+
+func (s *streamRuntime) Attach(ctx context.Context, containerID string, in io.Reader, out, err io.WriteCloser, tty bool,
+	resize <-chan remotecommand.TerminalSize) error {
+	return s.c.attachContainer(ctrdutil.WithNamespace(ctx), containerID, in, out, err, tty, resize)
+}
+
+func (s *streamRuntime) PortForward(ctx context.Context, podSandboxID string, port int32, stream io.ReadWriteCloser) error {
+	if port <= 0 || port > math.MaxUint16 {
+		return fmt.Errorf("invalid port %d", port)
+	}
+	ctx = ctrdutil.WithNamespace(ctx)
+	return s.c.portForward(ctx, podSandboxID, port, stream)
+}
+
+// handleResizing spawns a goroutine that processes the resize channel, calling resizeFunc for each
+// remotecommand.TerminalSize received from the channel.
+func handleResizing(ctx context.Context, resize <-chan remotecommand.TerminalSize, resizeFunc func(size remotecommand.TerminalSize)) {
+	if resize == nil {
+		return
+	}
+
+	go func() {
+		defer runtime.HandleCrash()
+
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case size, ok := <-resize:
+				if !ok {
+					return
+				}
+				if size.Height < 1 || size.Width < 1 {
+					continue
+				}
+				resizeFunc(size)
+			}
+		}
+	}()
+}