Docker tag8/24/2023 ![]() Suitable topics include Dockerfiles, Docker Compose, and architecture. DOCKER QUESTIONS MUST BE SPECIFICALLY RELATED TO SOFTWARE DEVELOPMENT. One tag is the timestamp taken during the build and the other one is latest tag.For questions about building and running Docker containers. Once the script executes there will be one more image id for the same repository with two tags. Now we just need to execute again our bash we used to build and tag image and wait for it to finish the job for us. This code is committed to local git repository and pushed to the remote one so that we can clone it again the temporary container and build from it. ![]() To keep things simple I just updated the message to print out v2.0 on the screen in the message instead of v1.0. Now we want to create another image with updated code. So we build our image with the timestamp tag, but attach additional tag latest to the image upon build. After the script is execute we should have the image of this sample application listed with two Hello World from v1.0 Hello World from v1.0 Hello World from v1.0 #sudo docker login -u username -p password Our focus now is to tag every last build image with latest tag. This way, all the temporary operations live int intermediate container and they are removed once the build process is done leaving the build host clean without any code or temp files except the result image that was built.įor the tagging, i decided to use timestamp for the simplicity reasons because this is not the focus. RUN dotnet publish "./dotnetcore-console-sample/SampleConsoleApp/SampleConsoleApp.csproj" -configuration=Release -runtime=linux-圆4 -output=/appįROM microsoft/dotnet:2.1.401-sdk AS finalĮNTRYPOINT For me it is a lot cleaner than cloning the repository on the build machine.įROM microsoft/dotnet:2.1.401-sdk AS build I prefer using intermediate container to build the solution. The complete solution code is in github so that I can clone the code repository and build it for the image. So nothing fancy in code, just an output message so that we can indicate that different images are user to run container.Ĭonsole.WriteLine("Hello World from v1.0") NET Core project for a walk through on how to use latest tag for the images you built last. Not in all cases, but in most you want that your latest built image to ge taged with latest tag so when you execute your CD script you always get the newest image to deploy. Does not provide exact commit signature hash lige git commit hash but it is not that hard to find it depending on the time. Pretty easy to use and it tells you when was image built which at the same time can be the time changes were push to the specific branch of the remote repository. This option uses the current date and time on the build machine in a format YYYYmmddHHMMSS In case you decide to do the whole code clone and build inside the intermediate container, this approach will not work unless you manage to pull out the docker build output, which I unfortunately could not make work and since I always use intermediate container this is not an option for me. How ever, this requires from you to have the repository conned locally on your build machine. Using Git commit hash is pretty convenient because from the tag you can easily get the comments on what is the latest change that triggered build and pushed image to the image repository.
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