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kandi X-RAY | Dockerfiles Summary
kandi X-RAY | Dockerfiles Summary
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QUESTION
I use dockerfiles to create a container. I know docker, but my bash understanding is very very limited. I know this question is probably a duplicate, but I don't understand what to search for.
Issue
The step RUN export A_NUM=$(echo ${A_VERSION} | head -c 3)
does not work. Even though in bash
it perfectly works. I tried:
- setting
ENV A_VERSION=$A_VERSION
- replicating my issue in bash (by going into the built container)
Any export
statement in the dockerfile seems to be futile - can anybody explain this?
Setting
I have app_A and app_B. When I configure app_B I need to take the chosen version of app_A into account. A simplified dockerfile looks like this:
...ANSWER
Answered 2021-Jun-01 at 15:51Each RUN
is a separate bash process, with its own environment variables. You must run all your bash commands in a single RUN
:
QUESTION
I'm trying to build a job in Jenkins which will responsible for launching SAP Hybris in docker environment,
for the 1808.5 version, I can find a recipe for docker as b2c_acc_dockerized where i can generate dockerfiles to build images of SAP Hybris, but for new version like 1905 and new version there is no recipe for docker,
did they not support docker recipe anymore ? Please help
what do you propose for me to do the job
...ANSWER
Answered 2021-Jun-01 at 08:30Docker is still supported after 1811. It's all described on the SAP Help
You can either create your own recipe. Or make use of the ant command createPlatformImageStructure
QUESTION
I have written several python scripts that will backtest trading strategies. I am attempting to deploy these through docker compose.
The feeder container copies test files to a working directory where the backtester containers will pick them up and process them. The processed test files are then sent to a "completed work" folder. Some CSV files that the backtester outputs are then written to an NFS share on another computer. I should mention that this is all running on Ubuntu 20.04.
As far as I can tell everything should be working, but for some reason the "docker-compose up" command hangs up on "Attaching to". There should be further output with print statements (I've unbuffered the Dockerfiles so those should show up). I've also left it running for a while to see if anything was getting processed and it looks like the containers never started up. I've looked at all the other threads dealing with this and have not found a solution that has worked to resolve this.
Any insight is very very appreciated. Thanks.
Here is the docker-compose file:
...ANSWER
Answered 2021-May-28 at 13:48It's been three weeks with no responses, but I just wanted to update with what I've found. In all cases where I've left "docker-compose up" running it eventually started.
At times it took 30 minutes, but it started every time.
QUESTION
Very simples .Net5.0 Dockerfiles, builds and runs fine on Windows 10 20H2. But when I push the image to Azure Container, it errors with New-AzContainerGroup: Unsupported windows image version
. Which sounds like I pushed Windows 10 and not server. Do I need to build this image on a server OS?
ANSWER
Answered 2021-May-25 at 03:53Found the answer, just need to use the right tagged build that was built on the OS I need. In the dockerfile below, it is the tag 5.0-windowsservercore-ltsc2019
. That was built with server core ltsc2019. Works in Container Service now.
QUESTION
Most of the DockerFiles seem to be generating the image from the source code directory. Is there a reason why this is done?
For example, If I run the build commands in a windows machine and copy the dist folder into a linux machine and run as per Option 2, isn't it supposed to work?
Option 1 - Docker file (from source directory)
...ANSWER
Answered 2021-May-24 at 21:40Your first form uses a Docker multi-stage build. This has the specific advantage of not depending on any particular tools being installed on the host system. I'd consider this path:
- If you have a clustered CI system, it can be much easier to run the build in a container than to try to get the required tools manually installed on every worker system.
- If you're working in a compiled language (C, Go, Rust, ...), you can consistently use Linux containers even if developers use a different host OS.
- If you need to do extra work to set up the build system, like installing extra C development packages.
- If you need a really exact version of the language runtime for whatever reason.
The second path depends on having the toolchain available outside the container environment. That's not necessarily a problem; most front-end developers will probably have Node installed anyways. I'd consider this path:
- If the result of the build is extremely portable across environments (compiled HTML and Javascript; Java
.jar
files; interpreted text-format Python or Ruby scripting code). - If there aren't big differences in different versions of the language runtime itself to produce the build. (Does your Webpack build do anything different on Node 8, 10, 12, or 14?)
- If the build system is something that's easy to install, or preinstalled in most host environments. (Most Linux and MacOS systems have Python, for example.)
- If a host build system can do incremental builds or otherwise run much faster than a clean-slate container build.
For what you show, with a simple front-end application that's compiled to static files, your second form is just fine. If you look at SO Java questions they almost universally COPY
a prebuilt .jar
file into an image, without including a build chain.
QUESTION
I'm having problems with a package that may be solved by rolling back to bionic. With the new modular rocker system it seems like the following would work based on their build on 18.04. When I build this with a hello world shiny app I just get shiny_server exited with code 0.
...ANSWER
Answered 2021-May-14 at 01:33I dont know why but separating the install scripts into separate layers makes an image that works.
QUESTION
I got stuck very interesting issue with azure pipeline. The issue is "Forbidden path outside the build context".If you have an add line in the Dockerfile which points to another directory, the build of the image fails with the message "Forbidden path".How can I solve this?
I was recently attempting to Dockerize a C# project, so I added a docker folder to the project and created a simple Dockerfile to get started like below:
Error:
...ANSWER
Answered 2021-May-04 at 01:44You can try to add buildContext
parameter in the Docker task.
buildContext: Path to the build context
Here is a case you can refer to.
QUESTION
I'm trying to change de default port for a Vue.js app on docker.
I used both examples in this official documentation: https://vuejs.org/v2/cookbook/dockerize-vuejs-app.html
Dockerfile with http-server:
...ANSWER
Answered 2021-May-09 at 12:08I found a working solution using nginx in https://github.com/adhavpavan/ContainerizingApps/tree/master/vue .
Dockerfile:
QUESTION
I have reactjs app and express app dockerized.
This is my docker-compose.yml file:
ANSWER
Answered 2021-May-08 at 20:53When you go to your browser and type http://localhost:3000
in, the browser makes a call to the client
container, does an HTTP GET to retrieve the Javascript code, and the browser actually runs the code. This is a critical difference: any fetch
calls or similar from your React application are running in the end user's browser, not inside Docker.
If a call is coming from the browser; it is part of your front-end application; or it is otherwise coming from outside Docker, then you need to use the host system's DNS name and the first published ports:
number. If the browser and the containers are both running on the same system you can use localhost
; if Docker is running in a VM (perhaps on the older Docker Toolbox setup) you need the VM's IP address.
QUESTION
I am totally new to AWS but I've been running my dockerized application locally for months now with no issues. Now that I am trying to deploy this app via AWS ECS/Fargate, my containers are stopped repeatedly with this linux error: standard_init_linux.go:219: exec user process caused: exec format error
. This error seems to suggest that the architecture in Fargate does not recognize one of the Linux commands I'm running but I can't find a good answer anywhere for how to find the architecture that's running or how to track down the specific command that's causing the issue.
These are my Dockerfiles for the frontend and backend. The project is built in the MERN stack and is split into the frontend (React) and the backend (MongoDB/Express)
Frontend:
...ANSWER
Answered 2021-May-02 at 23:38I think you've identified your problem.
You're building your images on Apple's M1 chip, which is an ARM architecture. Fargate is probably running on the more common Intel x86-64 architecture. Images you build locally on your Mac aren't going to be able to run there.
The easiest solution is probably to have your images build automatically in Docker Hub (or use a Github Action to build them in Github).
I don't have all the details about how you're building and deploying your images, so it's possible I'm missing some details.
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