166 lines
7.4 KiB
Python
166 lines
7.4 KiB
Python
#!/usr/bin/python3
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import sys
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import os
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import yaml
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import subprocess
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import ipaddress
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import re
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def main():
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args = sys.argv
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if len(args) < 2:
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print(f"Usage: {args[0]} /etc/netplan/00-installer-config.yaml")
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sys.exit()
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netplan_config_file = args[1]
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with open(netplan_config_file, 'r') as f:
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org_file_contents = f.read()
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netplan_config_yaml = yaml.safe_load(org_file_contents)
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if netplan_config_yaml == None:
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netplan_config_yaml = {}
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addresses = {}
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gateway4 = {}
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dhcp = {}
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network_block = netplan_config_yaml.get('network')
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no_network_block = False
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no_ethernets_block = False
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if network_block == None:
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no_network_block = True
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no_ethernets_block = True
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else:
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ethernets_block = network_block.get('ethernets')
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if ethernets_block == None:
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no_ethernets_block = True
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else:
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need_remove_interfaces = []
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for interface in ethernets_block:
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interface_block = ethernets_block[interface]
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interface_addresses = interface_block.get('addresses')
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if interface_addresses != None:
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if len(interface_addresses) != 0:
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addresses[interface] = interface_addresses
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elif interface == '':
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need_remove_interfaces.append(interface)
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for interface in need_remove_interfaces:
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del netplan_config_yaml['network']['ethernets'][interface]
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if len(addresses) != 0:
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print("You alreay configure some addresses for interfaces!")
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for interface in addresses:
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interface_addresses = addresses[interface]
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for addr in interface_addresses:
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print(f"{interface}: {addr}")
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ans = input("Do you want to continue configure? (y/n)")
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if ans.lower() != "y":
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sys.exit()
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default_interfaces = list(set(subprocess.Popen("ip -o -4 route show to default | awk '{print $5}'", shell=True, stdout=subprocess.PIPE).stdout.read().decode().strip().split("\n")))
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if '' in default_interfaces:
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default_interfaces.remove('')
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if len(default_interfaces) == 0:
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default_interfaces.extend(subprocess.Popen("ls /sys/class/net/|xargs", shell=True, stdout=subprocess.PIPE).stdout.read().decode().strip().split(" "))
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if 'lo' in default_interfaces:
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default_interfaces.remove('lo')
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if len(default_interfaces) == 0:
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if len(args) > 2:
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default_interfaces = args[2]
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else:
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print("No network interface detected!")
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print(f"Usage: {args[0]} /etc/netplan/00-installer-config.yaml $interface_name")
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sys.exit()
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change_flag = False
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for interface in default_interfaces:
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old_address = addresses.get(interface)
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if old_address != None:
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for addr in old_address:
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print(f"Found {addr} for interface {interface}!")
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ans = input("Do you want to continue configure? (y/n)")
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if ans.lower() != "y":
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continue
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new_addr = ""
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dhcp4 = input(f"Do you want to use dynamic address(dhcp) for interface {interface}? (y/n)")
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if dhcp4.lower() != "y":
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dhcp4 = False
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while new_addr == "":
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new_addr = input(f"New address for interface {interface}: ")
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try:
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ipaddress.IPv4Address(new_addr)
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except:
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print("Invalid ipaddress!")
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new_addr = ""
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addresses[interface] = [new_addr + '/24']
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new_gateway4 = input(f"New gateway4 for interface {interface}: (can leave blank by default 254)")
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gateway4[interface] = re.sub('[\\d]+$', '254', new_addr)
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if new_gateway4 != "":
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try:
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ipaddress.IPv4Address(new_gateway4)
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gateway4[interface] = new_gateway4
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except:
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print("Invalid gateway4 ipaddress!")
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print(f"Change to default: {gateway4[interface]}")
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change_flag = True
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else:
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change_flag = True
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dhcp4 = True
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if old_address != None:
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del addresses[interface]
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dhcp[interface] = dhcp4
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if no_network_block:
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netplan_config_yaml['network'] = {}
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change_flag = True
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if no_ethernets_block:
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change_flag = True
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netplan_config_yaml['network']['ethernets'] = {}
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if netplan_config_yaml['network'].get('version') == None:
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netplan_config_yaml['network']['version'] = 2
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if change_flag:
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for interface in default_interfaces:
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interface_content = netplan_config_yaml['network']['ethernets'].get(interface)
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if interface_content == None:
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interface_content = {}
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netplan_config_yaml['network']['ethernets'][interface] = interface_content
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new_addr = addresses.get(interface)
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if new_addr != None:
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if type(new_addr) != list:
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new_addr = [new_addr]
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netplan_config_yaml['network']['ethernets'][interface]['addresses'] = new_addr
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else:
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tmp = netplan_config_yaml['network']['ethernets'][interface]
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if tmp.get('addresses') != None:
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del netplan_config_yaml['network']['ethernets'][interface]['addresses']
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if tmp.get('nameservers') != None:
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del netplan_config_yaml['network']['ethernets'][interface]['nameservers']
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if tmp.get('gateway4') != None:
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del netplan_config_yaml['network']['ethernets'][interface]['gateway4']
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new_gateway4 = gateway4.get(interface)
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if new_gateway4 != None:
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netplan_config_yaml['network']['ethernets'][interface]['gateway4'] = new_gateway4
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dhcp4 = dhcp.get(interface)
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if dhcp4 != None:
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netplan_config_yaml['network']['ethernets'][interface]['dhcp4'] = dhcp4
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nameservers = interface_content.get('nameservers')
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if nameservers == None and dhcp4 == False:
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nameservers = {'addresses': []}
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if nameservers != None:
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nameservers_addresses = nameservers.get('addresses')
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if nameservers_addresses != None:
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default_nameservers = ['8.8.8.8', '8.8.4.4']
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for nameserver in default_nameservers:
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if nameserver not in nameservers_addresses:
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nameservers_addresses.append(nameserver)
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nameservers['addresses'] = nameservers_addresses
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netplan_config_yaml['network']['ethernets'][interface]['nameservers'] = nameservers
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with open(netplan_config_file, 'w+') as f:
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yaml.dump(netplan_config_yaml, f)
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netplan_get_status = os.system('sudo netplan get')
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if netplan_get_status == 0:
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if os.system('sudo netplan try --timeout 10') == 0:
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print("Finish configuring netplan!")
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sys.exit(0)
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else:
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print("Something went wrong!")
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f.write(org_file_contents)
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print("Recover changed!")
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sys.exit(1)
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with open(netplan_config_file, 'w+') as f:
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print(org_file_contents)
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f.write(org_file_contents)
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print("Recover changed!")
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if __name__ == '__main__':
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main() |