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controller/internal/stacks/manager.go

@@ -8,6 +8,7 @@ import (
 	"os/exec"
 	"path/filepath"
 	"sort"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -516,4 +517,67 @@ func (m *Manager) execCommand(name string, args ...string) (string, error) {
 	}
 
 	return stdout.String(), nil
+}
+
+// --- Memory helpers ---
+
+// ParseMemoryMB parses a memory string like "500M", "1G", "1.5G", "1024M", "768"
+// into megabytes. Returns 0 for empty or unparseable values. Case-insensitive.
+func ParseMemoryMB(s string) int {
+	s = strings.TrimSpace(s)
+	if s == "" {
+		return 0
+	}
+	upper := strings.ToUpper(s)
+
+	if strings.HasSuffix(upper, "GB") {
+		val, err := strconv.ParseFloat(strings.TrimSuffix(upper, "GB"), 64)
+		if err != nil {
+			return 0
+		}
+		return int(val * 1024)
+	}
+	if strings.HasSuffix(upper, "G") {
+		val, err := strconv.ParseFloat(strings.TrimSuffix(upper, "G"), 64)
+		if err != nil {
+			return 0
+		}
+		return int(val * 1024)
+	}
+	if strings.HasSuffix(upper, "MB") {
+		val, err := strconv.ParseFloat(strings.TrimSuffix(upper, "MB"), 64)
+		if err != nil {
+			return 0
+		}
+		return int(val)
+	}
+	if strings.HasSuffix(upper, "M") {
+		val, err := strconv.ParseFloat(strings.TrimSuffix(upper, "M"), 64)
+		if err != nil {
+			return 0
+		}
+		return int(val)
+	}
+
+	// Plain number — assume MB
+	val, err := strconv.ParseFloat(s, 64)
+	if err != nil {
+		return 0
+	}
+	return int(val)
+}
+
+// CommittedMemory returns the sum of mem_request and mem_limit across all deployed stacks.
+func (m *Manager) CommittedMemory() (requestMB int, limitMB int) {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+
+	for _, s := range m.stacks {
+		if !s.Deployed {
+			continue
+		}
+		requestMB += ParseMemoryMB(s.Meta.Resources.MemRequest)
+		limitMB += ParseMemoryMB(s.Meta.Resources.MemLimit)
+	}
+	return
 }