chore: add k8s and docker as service to agent and update logic for ansible deploy

agent/internal/logsource/kubernetes/impl.go

@@ -0,0 +1,95 @@
+package kubernetes
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os/exec"
+	"strings"
+	"syscall"
+
+	"gitea.d3m0k1d.ru/d3m0k1d/HellreigN/agent/internal/config"
+	"gitea.d3m0k1d.ru/d3m0k1d/HellreigN/agent/internal/logsource"
+)
+
+var _ logsource.LogSource = new(KubernetesLogSource)
+
+// KubernetesLogSource reads logs from a Kubernetes pod via `kubectl logs -f`.
+type KubernetesLogSource struct {
+	cmd           *exec.Cmd
+	stdout        io.ReadCloser
+	stdoutscanner *bufio.Scanner
+}
+
+// ReadLine implements logsource.LogSource.
+func (k *KubernetesLogSource) ReadLine() (string, error) {
+	if k.stdoutscanner.Scan() {
+		return k.stdoutscanner.Text(), nil
+	} else {
+		if k.stdoutscanner.Err() == nil {
+			return "", fmt.Errorf("%w: %s", logsource.ErrDead, io.EOF)
+		}
+		return "", k.stdoutscanner.Err()
+	}
+}
+
+// Close implements logsource.LogSource.
+func (k *KubernetesLogSource) Close() error {
+	_ = k.cmd.Process.Signal(syscall.SIGTERM)
+	return k.cmd.Wait()
+}
+
+// New creates a Kubernetes log source for the given pod.
+// The pod identifier is taken from cfg.Path in the format "namespace/podname".
+// If no namespace is specified (just "podname"), "default" namespace is used.
+// If cfg.Path is nil or empty, cfg.Name is used as the pod name with "default" namespace.
+func New(cfg config.ServiceConfig) (*KubernetesLogSource, error) {
+	podName := cfg.Name
+	namespace := "default"
+
+	if cfg.Path != nil && *cfg.Path != "" {
+		parts := strings.SplitN(*cfg.Path, "/", 2)
+		if len(parts) == 2 {
+			namespace = parts[0]
+			podName = parts[1]
+		} else {
+			podName = parts[0]
+		}
+	}
+
+	// kubectl logs -f <pod> -n <namespace> --tail=0 --no-color
+	// -f        : follow new logs
+	// --tail=0  : skip existing logs
+	// --no-color: strip color codes for clean output
+	cmd := exec.Command("kubectl", "logs", "-f", podName, "-n", namespace, "--tail=0", "--no-color") //nolint:gosec
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, fmt.Errorf("failed to create stdout pipe for kubectl logs: %w", err)
+	}
+
+	stderr, err := cmd.StderrPipe()
+	if err != nil {
+		return nil, fmt.Errorf("failed to create stderr pipe for kubectl logs: %w", err)
+	}
+
+	err = cmd.Start()
+	if err != nil {
+		return nil, fmt.Errorf("failed to start kubectl logs for pod %q (ns: %q): %w", podName, namespace, err)
+	}
+
+	stdoutscanner := bufio.NewScanner(stdout)
+
+	// Consume stderr to prevent pipe from filling up
+	go func() {
+		buf := make([]byte, 4096)
+		for {
+			_, err := stderr.Read(buf)
+			if err != nil {
+				return
+			}
+		}
+	}()
+
+	return &KubernetesLogSource{cmd, stdout, stdoutscanner}, nil
+}