Recently I was playing with docker API on OSX to use with Jenkins and the setup was little complicated so I thought to put all steps together in one place. Just to summarise the default tcp port for docker is 2375 (unencrypted) and 2376(encrypted) communication over tcp(although we can choose any other port).
Continue reading Enabling docker remote API on OSXCategory Archives: Docker
10 Docker image security best practices
Original files from: snyk
Local Smtp server on Docker
Quick and easy way to setup an SMTP mail server using docker
docker run --restart unless-stopped --name mailhog -p 1025:1025 -p 8025:8025 -d mailhog/mailhog
Jenkins in Docker
We love Jenkins and we love Docker, so let’s get them working together.
We are assuming you already have Docker installed on your environment.
Here is the terminal command to use:
Sample .NET Core Docker file
Here is a working example of a simple Docker file for a .NET Core 3.1 project
FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS build-env
WORKDIR /app
COPY project.csproj ./
RUN dotnet restore
COPY . ./
RUN dotnet publish -c Release -o out
FROM mcr.microsoft.com/dotnet/core/runtime:3.1
WORKDIR /app
COPY --from=build-env /app/out .
ENTRYPOINT ["dotnet", "project.dll"]
Docker cribsheet
Build
Build an image from the Dockerfile in the current directory and tag the image
docker build -t myimage -f Dockerfile .List all images that are locally stored with the Docker Engine
docker ps -aDelete an image from the local image store
docker image rm CONTAINER_NAMEYou may want to remove all orphaned images, you can do this with dandling field
docker rmi $(docker images -f dangling=true -q)
Benefits of Containers
What Are Containers?
Containers are a form of operating system virtualization. A single container might be used to run anything from a small microservice or software process to a larger application. Inside a container are all the necessary executables, binary code, libraries, and configuration files. Compared to server or machine virtualization approaches, however, containers do not contain operating system images. This makes them more lightweight and portable, with significantly less overhead. In larger application deployments, multiple containers may be deployed as one or more container clusters. Such clusters might be managed by a container orchestrator such as Kubernetes.
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NET Microservices Architecture for Containerised NET Applications
I came across this guide as it is an introduction to developing microservices-based applications and managing them using containers. It discusses architectural design and implementation approaches using .NET Core and Docker containers. To make it easier to get started with containers and microservices, the guide focuses on a reference containerized and microservice-based application that you can explore. The sample application is available at the eShopOnContainers GitHub repo.
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Docker – Basic Concepts, Components and Advantages
Docker’s containers allow for the immense economy of scale and have made development scalable, while at the same time keeping the process user-friendly.
Let’s get to work and see what it is all about, we’ll go over the following:
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Docker Containers
What is Docker? It is a hot topic in cloud computing, one that people are finding ample job opportunities with skills in it. But what is Docker used for?
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