表达网络配置的编程语言建议

Question

我想看看是否有表达网络配置的语言。我可以使用M4和YAML来宏观化一些配置，但是使用条件语句，它们似乎崩溃了。

任何建议？

感谢， 尼尔

Answer 1

我NCD programming language可能是你要找的。

下面是通过DHCP配置有线网络接口（同一个从维基）的一个样本程序：

process lan { 
    # Set device. 
    var("eth0") dev; 

    # Wait for device, set it up, and wait for network cable. 
    net.backend.waitdevice(dev); 
    net.up(dev); 
    net.backend.waitlink(dev); 

    # DHCP configuration. 
    # net.ipv4.dhcp() will block here until it obtaines an IP address. 
    # Note that it will only obtain the IP address, and *not* assign it; 
    # we do that with a separate command below. 
    net.ipv4.dhcp(dev) dhcp; 

    # Check IP address - make sure it's not local. 
    # If you have other reserved subnets around, check for those too. 
    ip_in_network(dhcp.addr, "127.0.0.0", "8") test_local; 
    ifnot(test_local); 

    # Assign IP address, as obtained by DHCP. 
    net.ipv4.addr(dev, dhcp.addr, dhcp.prefix); 

    # Add default route, as obtained by DHCP. 
    net.ipv4.route("0.0.0.0", "0", dhcp.gateway, "20", dev); 

    # Configure DNS servers, as obtained by DHCP. 
    net.dns(dhcp.dns_servers, "20"); 
} 

请务必阅读整个NCD维基页面。 NCD的功能远不止于它最初的样子（比如，条件，循环，未知设备的动态配置......）。它甚至可以执行一些非网络相关的任务，如报告输入设备（键盘，鼠标）事件。