Usage with testContainers-go

[majelbstoat]

I'm trying to programmatically start fake-gcs-server using testcontainers-go. Example:

       // Start a container listening on port 3000 internally.
        storagePort := 3000
	container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
		ContainerRequest: testcontainers.ContainerRequest{
			Image:          "fsouza/fake-gcs-server:latest",
			Entrypoint:     []string{"/bin/fake-gcs-server", "-data", "/data", "-scheme", "http"},
			BindMounts:     map[string]string{"/data": e.hostDir},
			ExposedPorts:   []string{TCPPort(storagePort)},
			WaitingFor:     wait.ForLog("server started at"),
			Networks:       []string{Network},
			NetworkAliases: map[string][]string{Network: {StorageHostname}},
		},
		Started: true,
	})
	if err != nil {
		return err
	}

        // map this internal port to a randomly chosen external port.
	port, err := container.MappedPort(ctx, storagePort)
	if err != nil {
		return err
	}

        // set the emulator host and create a client.
        os.Setenv("STORAGE_EMULATOR_HOST", fmt.Sprintf("localhost:%s", port.Port())
        client, err  := storage.NewClient()
}

As with other folks, I can curl --insecure http://localhost:XXXX/storage/v1/b/sample-bucket/o and see my files in there, where XXXX is the mapped external port, but I can't retrieve them using the storage client.

From other issues, I believe this is because I'm not setting a public host. My problem is, I don't know what the full public host will be until after the container starts, because that's when I get the mapped port.

As others have note, -public-host 0.0.0.0 and -public-host localhost don't work, so I have this circular dependency which I can't figure out how to break.

[fsouza]

@sergseven recently added an internal endpoint for updating some configuration parameters, aimed specifically at setting the external URL after starting the container with test containers, you can see a Java example in his PR: #659 (comment)

Let me know if that's enough information is enough for you.

We should probably document that endpoint in the README at some point.

[majelbstoat]

So, that looks like it might be helpful, thanks! But, at the moment, it looks like it can only be used to change the ExternalUrl.

https://github.com/fsouza/fake-gcs-server/blob/main/fakestorage/config.go

I can submit a patch for changing the public host, if that's acceptable?

[fsouza]

@majelbstoat ohh sorry I misread your message. Yeah, that's acceptable, feel free to send the PR adding support for overriding the public host!

[majelbstoat]

Cool, PR here: #712 :)