我有一个要使用的外部 API,为此我使用了 WebTarget
private final String target_url = "http://localhost:3000/models";
WebTarget target = client.target(target_url);
GenericType<List<Model>> genericType = new GenericType<List<Model>>() {};
List<Model> modelList = target.request(MediaType.APPLICATION_JSON_VALUE).get(genericType);
server.port=3001
它在没有 docker 的情况下工作正常,我可以通过 http://localhost:3000 访问外部 API
但使用 Docker 我不能。
Dockerfile
FROM openjdk:8-jre-slim
COPY target/*.jar app.jar
ENTRYPOINT ["java","-jar","/app.jar"]
两个容器在同一个网络中
命令:
docker run --rm -p 3001:3001 --network external-api image-name:version
为了运行外部 API,我正在执行
docker run --rm -p 3000:3000 --network external-api external-api-image-name:version
我也在两个容器之间执行了ping
docker exec -ti 0d1e786b3f06 ping 19c5bb4ab4d5
PING 19c5bb4ab4d5 (172.27.0.2): 56 data bytes
64 bytes from 172.27.0.2: seq=0 ttl=64 time=0.232 ms
64 bytes from 172.27.0.2: seq=1 ttl=64 time=0.098 ms
64 bytes from 172.27.0.2: seq=2 ttl=64 time=0.169 ms
64 bytes from 172.27.0.2: seq=3 ttl=64 time=0.188 ms
错误:
java.net.ConnectException: Connection refused (Connection refused)
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_292]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_292]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_292]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_292]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_292]
at java.net.Socket.connect(Socket.java:607) ~[na:1.8.0_292]
at sun.net.NetworkClient.doConnect(NetworkClient.java:175) ~[na:1.8.0_292]
at sun.net.www.http.HttpClient.openServer(HttpClient.java:463) ~[na:1.8.0_292]
at sun.net.www.http.HttpClient.openServer(HttpClient.java:558) ~[na:1.8.0_292]
at sun.net.www.http.HttpClient.<init>(HttpClient.java:242) ~[na:1.8.0_292]
.
.
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答案 0 :(得分:0)
您的容器无法访问 localhost
中的 String target_url
的问题。您应该在配置文件或属性中覆盖它。例如,您可以将您的 target_url
移动到 class 字段并对其进行注释 @Value(external.api.url)
并在 application.propeties
中添加 external.api.url=your_container_name:port/uri