java更改centos ip 子网掩码 网关 DNS

shell脚本

在home下创建sbin目录，在此目录下创建change_network.sh，其内容如下:

#!/bin/bash

# 设置新的网络配置
new_ip=$1
new_netmask=$2
new_gateway=$3
interface="ens33"

# 备份原始配置文件
cp /etc/sysconfig/network-scripts/ifcfg-$interface /etc/sysconfig/network-scripts/ifcfg-$interface.backup

# 编辑网络配置文件
cat <<EOF > /etc/sysconfig/network-scripts/ifcfg-$interface
DEVICE=$interface
BOOTPROTO=static
IPADDR=$new_ip
NETMASK=$new_netmask
GATEWAY=$new_gateway
ONBOOT=yes
EOF

# 重启网络服务
systemctl restart network

授予可执行权限

chmod +x change_network.sh

java核心代码

需要root身份运行该jar包:

@Service
@Slf4j
@RequiredArgsConstructor
public class EdgeGatewayServiceImpl implements EdgeGatewayService {

    @Value("${linux.change.network.sh:/home/fz/sbin/change_network.sh}")
    private String changeNetworkSh;


    @Override
    public void network(NetworkDto netWorkDto) {
        //设置ip 子网掩码 网关
        setIpAndSubnetMaskAndGateway(netWorkDto);
        if (StringUtils.isNotBlank(netWorkDto.getDns())) {
            //设置dns
            executeCommand("sudo echo nameserver " + netWorkDto.getDns() + " > /etc/resolv.conf");
        }
        if (StringUtils.isNotBlank(netWorkDto.getSpareDns())) {
            //设置备用dns
            executeCommand("sudo echo nameserver " + netWorkDto.getSpareDns() + " >> /etc/resolv.conf");
        }
    }


    private static void executeCommand(String command) {
        //使用ProcessBuilder执行命令
        ProcessBuilder processBuilder = new ProcessBuilder("/bin/bash", "-c", command);
        //获取执行结果
        try {
            Process process = processBuilder.start();
            //等待执行完成
            int exitCode = process.waitFor();
            if (exitCode != 0) {
                log.error("执行命令失败,exitCode:{}", exitCode);
            }
        } catch (Exception e) {
            log.error("执行命令异常:{}", e);
            throw new RuntimeException("执行命令异常");
        }
    }


    public void setIpAndSubnetMaskAndGateway(NetworkDto netWorkDto) {
        try {
            ProcessBuilder processBuilder = new ProcessBuilder(changeNetworkSh,
                    netWorkDto.getIp(), netWorkDto.getSubnetMask(), netWorkDto.getGateway());
            processBuilder.redirectErrorStream(true);
            Process process = processBuilder.start();
            BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            String line;
            while ((line = reader.readLine()) != null) {
                log.info("network3 line: {}", line);
            }
            int exitCode = process.waitFor();
            log.info("network3 执行完毕, exitCode: {}", exitCode);
        } catch (Exception e) {
            log.info("network3 error: {}", e);
        }
    }
}

测试的CURL

curl --location 'http://192.168.11.129:8180/iot-operator-tool/edge-gateway/network3' \
--header 'Content-Type: application/json' \
--data '{
    "networkInterfaceName": "ens33",
    "ip": "192.168.11.130",
    "subnetMask": "255.255.255.0",
    "gateway": "192.168.11.3",
    "dns": "appresource.ok.com 127.0.0.1",
    "spareDns": "appservice 127.0.0.1"
}'