Having a running dev container is a good start, but only when we can write code is it useful. Let’s look how we can use Visual Studio Code to develop inside our container. Open your code in VS Code Open your code in VS Code as you do with all your other projects. At …
Last week we looked at the reason why we should use dev containers to write code. This week we create a dev container to develop a Ruby application on a machine that has no Ruby installed. Why would you do that? Tools like rbenv are a great help to manage your Ruby environments. However, getting …
The more connected our applications are, the more complex their development is. The days when an application talked only to a database seem to be a thing of the past. Today, our applications connect to the cloud, talk to various services, and are often connected to multiple social networks. We need more and more infrastructure …
The more complex an application becomes, the greater is the benefit of Docker. If everything runs in containers, we can use a tool like docker-compose and start all the parts with one single command. No need to install all the tools, services, and frameworks – just run docker-compose and the magic happens automatically. We can …
At the spring cleaning of my computers, I noticed that one device I had nearly no disk space left. After removing old files and the usual suspects (like Windows updates) I found that Docker uses the most space. While Docker Desktop for Windows showed me a disk usage of around 50 GB, TreeSize found 124 …
After the installation and the enforced reboot of my machine, Docker Desktop for Windows did not bother to start. I got the Docker command line application in the Command Prompt, but the hello-world example ended with an error:
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docker run hello-world |
docker: error during connect: This error may indicate that the docker daemon is not running.: Post …
Saving the state of a container in Docker is an anti-pattern. You should create your containers in a way that you can throw them away and start with a new one. However, there are some use-cases in which a snapshot of your current container is of great help. One such use-case is creating a snapshot …
Last week I run into this annoying problem when I tired to run the .Net samples for Docker: Step 7/23 : RUN dotnet restore —> Running in ce2d8740cf2e Restore completed in 389.74 ms for C:\app\dotnetapp\dotnetapp.csproj. Restore completed in 220.85 ms for C:\app\utils\utils.csproj. C:\Program Files\dotnet\sdk\2.2.402\NuGet.targets(123,5): error : Unable to load the service index for source https://api.nuget.org/v3/index.json. …
Popular technologies come with an enormous amount of “promotional” material. Docker is no exception to this rule: you find an endless stream of things to read, to watch and to listen to about Docker and containers. With only a limited amount of time at your hand, where should you spend it? A few weeks ago, …
NDC Oslo keeps growing. This year you could choose from 19 pre-conference workshops and attend one of 10 parallel tracks throughout the 3 days of the conference. The mix of well-established speakers and newcomers was very interesting and nearly 2500 attendees found their way to the Oslo Spektrum. My biggest challenge this year was to …