first commit

backend/internal/api/resource_validation.go

@@ -0,0 +1,38 @@
+package api
+
+import (
+	"fmt"
+	"math"
+)
+
+const minVCPU = 0.25
+
+func validateContainerResourceRequest(vcpu float64, ramMB int, diskGB int) error {
+	host := getHostInfo()
+
+	if vcpu <= 0 {
+		return fmt.Errorf("vCPU must be greater than 0")
+	}
+	if vcpu < minVCPU {
+		return fmt.Errorf("vCPU must be at least %.2f", minVCPU)
+	}
+	if math.Abs(vcpu*4-math.Round(vcpu*4)) > 0.000001 {
+		return fmt.Errorf("vCPU must use 0.25 increments")
+	}
+	if host.CPU.Cores > 0 && vcpu > float64(host.CPU.Cores) {
+		return fmt.Errorf("vCPU cannot exceed host CPU cores (%d)", host.CPU.Cores)
+	}
+	if host.RAM.TotalMB > 0 && ramMB > int(host.RAM.TotalMB) {
+		return fmt.Errorf("memory cannot exceed host memory (%d MB)", host.RAM.TotalMB)
+	}
+	if host.Disk.TotalGB > 0 {
+		maxDiskGB := int(math.Floor(host.Disk.TotalGB))
+		if maxDiskGB < 1 {
+			maxDiskGB = 1
+		}
+		if diskGB > maxDiskGB {
+			return fmt.Errorf("disk cannot exceed host disk (%d GB)", maxDiskGB)
+		}
+	}
+	return nil
+}