Is it possible to backup a running Docker container? Is the export command suitable for doing that?
I am writing a Dockerfile and I want to know if there is any way to make comments in this file? Does docker have a comment option that takes the rest of a line and ignores it?
With 1.9, is there a way to start a container directly with two or more network interfaces? You can do it after the container is started with “docker network connect”, but it means the process is already running and might miss the creation of the new one.
I’m using a Docker container for Django development, and the container runs Gunicorn with Nginx. I’d like code changes to auto-load, but the only way I can get them to load is by rebuilding with docker-compose (docker-compose build). The problem with “build” is that it re-runs all my pip installs. I’m using the Gunicorn –reload […]
I linked my app container to postgres on run: docker run –link postgres:postgres someproject/develop and it worked fine. But I realized that I need to install some stuff to database with django command before run. So I need linking while build. How can I do that? docker build -h doesn’t have –link option.
Now that I found a way to expose host files to the container (-v option) I would like to do kind of the opposite: How can I edit files from a running container with a host editor? sshfs could probably do the job but since a running container is already some kind of host directory […]
How can I include files from outside of Docker’s build context using the “ADD” command in the Docker file? From the Docker documentation: The path must be inside the context of the build; you cannot ADD ../something/something, because the first step of a docker build is to send the context directory (and subdirectories) to the […]
I’m still wrapping my head around Kubernetes and how that’s supposed to work. Currently, I’m struggling to understand how to model something like a PostgreSQL cluster with streaming replication, scaling out and automatic failover/failback (pgpool-II, repmgr, pick your poison). My main problem with the approach is the dual nature of a PostgreSQL instance, configuration-wise — […]
I’m a bit dense on how to name Dockerfiles. The examples on GitHub just seem to be called Dockerfile. Do I give them a name and extension; if so what? Or just call them Docker file? Many thanks, LRP
I am a Java developer. We use Weblogic to host our applications. I have been told to look into replacing weblogic with an opensource alternative. We are planning use with SpringBoot. We are also looking at Docker/Cloud Foundry. However Docker/Cloud Foundry is new territory for me. Can someone please tell me the difference between Cloud […]