Docker for Serverless Applications

Within a Docker network

Next, we will try something a bit advanced by preparing a small system that looks similar to the following diagram. The scenario is that we would like a container started by runf inside another container, wrapper-runf (which is, in reality, a function executor), to connect to some network services running on the same Docker network, test_net:

Figure 9.2: An example of using RunF inside a Docker network

The trick is that we put resolv.conf from the standard Docker Swarm mode as ./rootfs/etc/resolv.conf to make the process inside the nested container be able to resolve all service names on the attached Docker network. ...