feat: add ip module for automated free IP discovery in agent pool

infra_cli/dns.py

@@ -55,4 +55,25 @@ class DNSManager:
     def list(self):
         hosts = self.exec_lxc(f"cat {self.hosts_file}").stdout
         dns = self.exec_lxc(f"cat {self.dns_file}").stdout
-        return {"hosts": hosts, "dns": dns}
+        return {"hosts": hosts, "dns": dns}
+
+    def get_free_ips(self, range_start=1, range_end=254, subnet="10.32.70"):
+        """Finds free IPs in the specified range by checking both static and dynamic leases"""
+        # 1. Get all static IPs from dhcp-hosts.conf and dynamic-hosts.conf
+        static_configs = self.exec_lxc(f"cat /etc/dnsmasq.d/dhcp-hosts.conf {self.hosts_file} 2>/dev/null").stdout
+        import re
+        used_ips = set(re.findall(r'[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}', static_configs))
+        
+        # 2. Get all active dynamic leases
+        leases = self.exec_lxc("cat /var/lib/misc/dnsmasq.leases 2>/dev/null").stdout
+        used_ips.update(set(re.findall(r'[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}', leases)))
+
+        # 3. Find first available in the agent range
+        free_ips = []
+        for i in range(range_start, range_end + 1):
+            candidate = f"{subnet}.{i}"
+            if candidate not in used_ips:
+                free_ips.append(candidate)
+            if len(free_ips) >= 10: # Just return the top 10
+                break
+        return free_ips