访问docker主机时java.net.SocketException [英] java.net.SocketException when accessing docker host
问题描述
[root @ 743fedf46128 test]＃java SocketTest 10.1.196.134 4444 127.0.0.1 0
尝试使用ip地址连接
使用远程ip 10.1.196.134
使用远程端口4444
使用本地ip 127.0.0.1
使用本地端口0
/ 10.1.196.134，4444，/127.0.0.1，0
java.net.SocketException：无效的参数或无法分配请求的地址
在java.net.PlainSocketImpl.socketConnect（Native Method）
at java.net.AbstractPlainSocketImpl.doConnect（AbstractPlainSocketImpl.java:339）
在java.net.AbstractPlainSocketImpl.connectToAddress（AbstractPlainSocketImpl.java:200）
在java.net.AbstractPlainSocketImpl.connect（AbstractPlainSocketImpl.java： 182）
在java.net.SocksSocketImpl.connect（SocksSocketImpl.java:392）
在java.net.Socket.connect（Socket.java:579）
在java.net.Socket .connect（Socket.java:528）
在SocketTest.main（SocketTest.java:54）
Java Class TestSocket实际上只尝试打开套接字：
public static void main（String [] args）{
String remoteIp = args [0];
String remotePort = args [1];
String localIp = args [2];
String localPort = args [3];
System.out.println（尝试使用ip地址连接）;
System.out.println（使用远程ip+ remoteIp）;
System.out.println（使用远程端口+ remotePort）;
System.out.println（using local ip+ localIp）;
System.out.println（使用本地端口+ localPort）;
Socket workSocket = null;
try {
InetAddress remoteAddress = InetAddress.getByName（remoteIp）;
InetAddress localAddress = InetAddress.getByName（localIp）;
int rPort = Integer.parseInt（remotePort）;
int lPort = Integer.parseInt（localPort）;
System.out.println（remoteAddress +，+ rPort +，+ localAddress +，+ lPort）;
workSocket = new Socket（）;
workSocket.setReuseAddress（true）;
workSocket.bind（new InetSocketAddress（localAddress，lPort））;
workSocket.setSoTimeout（1000）;
workSocket.connect（new InetSocketAddress（remoteAddress，rPort））;
}
最后一行（连接）失败。
Ping，以及从正在运行的容器中的端口号，但是工作：
[admin @ pluto〜] $ docker exec -it --user root pensive_almeida bash
[root @ 743fedf46128 test]＃ping -c 3 10.1.196.134
PING 10.1.196.134（10.1.196.134）56（ 84）字节的数据。
从10.1.196.134的64字节：icmp_seq = 1 ttl = 64时间= 0.047 ms
从10.1.196.134的64个字节：icmp_seq = 2 ttl = 64时间= 0.101 ms
从10.1 .196.134：icmp_seq = 3 ttl = 64 time = 0.099 ms
--- 10.1.196.134 ping统计---
3个数据包发送，3个接收，0％丢包，时间1999ms
rtt min / avg / max / mdev = 0.047 / 0.082 / 0.101 / 0.026 ms
[root @ 743fedf46128 test]＃telnet 10.1.196.134 4444
尝试10.1.196.134。 ..
连接到10.1.196.134。
转义字符为'^]。
这是一个测试
外部主机关闭的连接。
任何人都可以提供一个提示，为什么尝试连接失败与java？
对于完整性，我的Dockerfile如下所示：
FROM centos：centos7
＃设置代理
ENV HTTP_PROXY'http://175.23.236.88:3128/'
ENV HTTPS_PROXY'http://175.23.236.88:3128/'
＃安装telnet
运行yum -y安装telnet
运行yum -y安装wget
＃准备环境
ENV JAVA_HOME / opt / java
ENV PATH $ PATH： $ JAVA_HOME / bin
＃安装Oracle Java7
RUN wget --no-check-certificate --no-cookies --headerCookie：oraclelicense = accept-securebackup-cookie\
http://download.oracle.com/otn-pub/java/jdk/7u80-b15/jdk-7u80-linux-x64.tar.gz&& \
tar -xvf jdk-7u80-linux-x64.tar.gz&& \
rm jdk * .tar.gz&& \
mv jdk * $ {JAVA_HOME}
WORKDIR / opt / test
＃添加测试类
ADD dockerfiles / SocketTest.class / opt / test / SocketTest.class
提前感谢您的回复。
您可以将--net = host添加到docker运行命令中，但主机可以完全访问您的容器。然而，您可以在Docker文件中或在docker运行命令中的外部暴露一个端口，但我更喜欢前者。
以下是我的示例：
拉基本图片
FROM ubuntu：14.04
运行apt-get update
运行apt-get安装软件属性常用-y
RUN add-apt-repository ppa：webupd8team / java -y
运行apt-get update
RUN echo debconf shared / accepted-oracle-license-v1-1 select true | debconf-set-choices
运行apt-get install oracle-java8-installer -y
运行apt-get install oracle-java8-set-default -y
运行mkdir / temporary
ADD Client.jar / temporary
WORKDIR / temporary
EXPOSE 15000
ENTRYPOINT / bin / bash
I'm new to docker and need to connect from inside a running centos docker container to the host running the container using a java socket. When trying to connect a SocketException occurs:
[root@743fedf46128 test]# java SocketTest 10.1.196.134 4444 127.0.0.1 0
Trying to connect using ip address
Using remote ip 10.1.196.134
Using remote port 4444
Using local ip 127.0.0.1
Using local port 0
/10.1.196.134, 4444, /127.0.0.1, 0
java.net.SocketException: Invalid argument or cannot assign requested address
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at SocketTest.main(SocketTest.java:54)
The Java Class TestSocket actually only tries to open a socket:
public static void main(String[] args) {
String remoteIp = args[0];
String remotePort = args[1];
String localIp = args[2];
String localPort = args[3];
System.out.println("Trying to connect using ip address");
System.out.println("Using remote ip " + remoteIp);
System.out.println("Using remote port " + remotePort);
System.out.println("Using local ip " + localIp);
System.out.println("Using local port " + localPort);
Socket workSocket = null;
try {
InetAddress remoteAddress = InetAddress.getByName(remoteIp);
InetAddress localAddress = InetAddress.getByName(localIp);
int rPort = Integer.parseInt(remotePort);
int lPort = Integer.parseInt(localPort);
System.out.println(remoteAddress + ", " + rPort + ", " + localAddress + ", " + lPort);
workSocket = new Socket();
workSocket.setReuseAddress(true);
workSocket.bind(new InetSocketAddress(localAddress, lPort));
workSocket.setSoTimeout(1000);
workSocket.connect(new InetSocketAddress(remoteAddress, rPort));
}
And it fails on the last line (the connect).
Ping as well as telneting the port from within the running container however work:
[admin@pluto ~]$ docker exec -it --user root pensive_almeida bash
[root@743fedf46128 test]# ping -c 3 10.1.196.134
PING 10.1.196.134 (10.1.196.134) 56(84) bytes of data.
64 bytes from 10.1.196.134: icmp_seq=1 ttl=64 time=0.047 ms
64 bytes from 10.1.196.134: icmp_seq=2 ttl=64 time=0.101 ms
64 bytes from 10.1.196.134: icmp_seq=3 ttl=64 time=0.099 ms
--- 10.1.196.134 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 1999ms
rtt min/avg/max/mdev = 0.047/0.082/0.101/0.026 ms
[root@743fedf46128 test]# telnet 10.1.196.134 4444
Trying 10.1.196.134...
Connected to 10.1.196.134.
Escape character is '^]'.
This is a test
Connection closed by foreign host.
Can anybody provide me a hint, why trying to connect fails with java ? For completness, my Dockerfile looks like this:
FROM centos:centos7
# Set the proxies
ENV HTTP_PROXY 'http://175.23.236.88:3128/'
ENV HTTPS_PROXY 'http://175.23.236.88:3128/'
# Install telnet
RUN yum -y install telnet
RUN yum -y install wget
# Prepare environment
ENV JAVA_HOME /opt/java
ENV PATH $PATH:$JAVA_HOME/bin
# Install Oracle Java7
RUN wget --no-check-certificate --no-cookies --header "Cookie:oraclelicense=accept-securebackup-cookie" \
http://download.oracle.com/otn-pub/java/jdk/7u80-b15/jdk-7u80-linux-x64.tar.gz && \
tar -xvf jdk-7u80-linux-x64.tar.gz && \
rm jdk*.tar.gz && \
mv jdk* ${JAVA_HOME}
WORKDIR /opt/test
# Add the test class
ADD dockerfiles/SocketTest.class /opt/test/SocketTest.class
Thank you in advance for your replies.
You could add --net=host to your docker run command, but in that way the host has full access to your container. You can however expose a port within your Dockerfile or on the outside in your docker run command, but I prefer the former.
Here's an example of mine:
Pull base image
FROM ubuntu:14.04
RUN apt-get update RUN apt-get install software-properties-common -y RUN add-apt-repository ppa:webupd8team/java -y RUN apt-get update RUN echo debconf shared/accepted-oracle-license-v1-1 select true | debconf-set-selections RUN apt-get install oracle-java8-installer -y RUN apt-get install oracle-java8-set-default -y RUN mkdir /temporary ADD Client.jar /temporary
WORKDIR /temporary
EXPOSE 15000
ENTRYPOINT /bin/bash
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