HansvdLaan/IssueWithSubdomain

The Problem

Question: How can I reach the subdomain test123 hosted by the 'S3Ninja' container from the 'MyContainer' container? I get an error the host could not be resolved.

✅ I can reach the subdomain from a terminal on my computer:

curl test123.localhost:9000                                                                
<?xml version="1.0" encoding="UTF-8"?><Error>
    <Code>AccessDenied</Code>
    <Message>Authentication required</Message>
    <Resource>/test123</Resource>
</Error>

✅ I can reach the 'S3Ninja' container from the 'MyContainer' container:

docker exec -it MyContainer sh   

curl S3Ninja:9000                                                                
<?xml version="1.0" encoding="UTF-8"?><ListAllMyBucketsResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
    <hint>Goto: http://S3Ninja:9000/ui to visit the admin UI</hint>
    <Owner>
        <ID>initiatorId</ID>
        <DisplayName>initiatorName</DisplayName>
    </Owner>
    <Buckets/>
</ListAllMyBucketsResult>

❌ However, the the subdomain test123 hosted by the 'S3Ninja' container is not reachable from the 'MyContainer' container.

docker exec -it MyContainer sh       

curl test123.S3Ninja:9000    
curl: (6) Could not resolve host: test123.S3Ninja

... 😢