Import code, preparing for release

cmd/ctrld/os_linux.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"os/exec"
+)
+
+// allocate loopback ip
+// sudo ip a add 127.0.0.2/24 dev lo
+func allocateIP(ip string) error {
+	cmd := exec.Command("ip", "a", "add", ip+"/24", "dev", "lo")
+	if err := cmd.Run(); err != nil {
+		mainLog.Error().Err(err).Msg("allocateIP failed")
+		return err
+	}
+	return nil
+}
+
+func deAllocateIP(ip string) error {
+	cmd := exec.Command("ip", "a", "del", ip+"/24", "dev", "lo")
+	if err := cmd.Run(); err != nil {
+		mainLog.Error().Err(err).Msg("deAllocateIP failed")
+		return err
+	}
+	return nil
+}