CODEWITHSUNDEEP
springdockerspring-webfluxreactor-netty
Archimedes Trajano
Archimedes Trajano

Reputation: 41580

How do we connect Spring WebClient to a Unix Domain Socket?

Spring's WebClient underlyingly uses Netty which access to Unix domain sockets. I am trying to make it access /var/run/docker.sock so that I can perform operations using the API as I need /services which is not supported by the docker-java library.

My current workaround is to create a socat container that exposes the Docker socket to TCP within an internal network which in turn allows me to use WebClient's HTTP connections.

Though come to think of it, having this workaround gives one benefit of not needing to put a larger Java application on the manager node.

However, I am still curious how to connect to the unix domain docket.

Upvotes: 3

Views: 1640

Answers (2)

Nick H
Nick H

Reputation: 8992

You can create a Netty HttpClient following their documentation regarding Unix Domain Sockets here.

import io.netty.channel.unix.DomainSocketAddress;
import reactor.netty.http.client.HttpClient;

HttpClient client = HttpClient.create()
                              .remoteAddress(() -> new DomainSocketAddress("/var/run/docker.sock"));

Then you can tell WebClient to use this HttpClient like this.

WebClient.builder()
         .clientConnector(new ReactorClientHttpConnector(client))
         .build();

Upvotes: 3

yomateo
yomateo

Reputation: 2377

You can expose the docker daemon over TCP and use the REST API.

Upvotes: -1

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