Best Docker Tools to Buy in October 2025
Orblue Pizza Dough Docker Pastry Roller with Spikes, Pizza Docking Tool for Home & Commercial Kitchen - Pizza Making Accessories that Prevent Dough from Blistering, Black
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EFFORTLESS PIZZA PERFECTION FOR FIRST-TIME BAKERS-JUST ROLL AND POKE!
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CREATE CONSISTENT, DELICIOUS CRUSTS FOR PIZZAS, PIES, AND COOKIES!
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QUICK CLEAN-UP WITH DISHWASHER-SAFE DESIGN-MORE TIME FOR PIZZA FUN!
Pizza Dough Docker, Premium Dough Roller with Stainless Steel Spikes, Sturdy Pizza Docking Tool that Prevents Dough from Blistering, Time-Saver for Making Pizza Cookie Pie Pastry
- PREMIUM FOOD-GRADE STEEL ENSURES DURABILITY AND LONG-LASTING USE.
- VERSATILE TOOL FOR PIZZAS, COOKIES, PASTRIES, AND MORE!
- EFFORTLESSLY SAVES TIME WITH EFFICIENT HOLE-POKING DESIGN.
Docker: Practical Guide for Developers and DevOps Teams - Unlock the Power of Containerization: Skills for Building, Securing, and Orchestrating with Docker (Rheinwerk Computing)
Orblue Pizza Dough Docker, Pastry Roller with Spikes Pizza Docking Tool for Home & Commercial Kitchen - Pizza Making Accessories that Prevent Dough from Blistering Light Gray
- EFFORTLESSLY CREATE PERFECT CRUSTS FOR PIZZA, PIES, AND MORE!
- QUICK AND EASY CLEANUP-DISHWASHER SAFE FOR BUSY BAKERS.
- IDEAL GIFT FOR COOKING ENTHUSIASTS AND FIRST-TIME BAKERS ALIKE!
EVEDMOT Pizza Dough Docker Roller Stainless Steel, Pin Puncher Dough Hole Maker, Docking Tool for Pizza Pie Cookie Pastry Bread
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DURABLE WOOD HANDLE & FOOD-GRADE STAINLESS STEEL FOR LASTING USE.
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EFFORTLESSLY CREATE PERFECT DOUGH WITH OUR TIME-SAVING DOCKER TOOL.
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IDEAL GIFT FOR BAKERS, PERFECT FOR ANY SPECIAL OCCASION OR HOLIDAY!
Orblue Pizza Dough Docker, Pastry Roller with Spikes, Pizza Docking Tool for Home & Commercial Kitchen - Pizza Making Accessories that Prevent Dough from Blistering Gray
- EFFORTLESSLY ACHIEVE PERFECT PIZZA CRUSTS, EVEN FOR BEGINNERS!
- QUICK TO CLEAN-MORE TIME FOR PIZZA, LESS TIME FOR SCRUBBING!
- IDEAL GIFT FOR COOKING LOVERS, ENHANCING EVERY PIZZA-MAKING KIT!
Professional Pizza Dough Docker Stainless Steel Pizza Roller with Spikes Pastry Dough Docker for Crackers, Homemade Bread, Pie, Cake, Cookies
- ROLL & AERATE DOUGH EASILY-NO MORE BUBBLE TROUBLE IN MINUTES!
- HEAVY-DUTY STAINLESS STEEL BUILD ENSURES LONG-LASTING PERFORMANCE.
- PERFECT FOR PROS & BEGINNERS; VERSATILE FOR ALL YOUR BAKING NEEDS!
Docker: Up & Running: Shipping Reliable Containers in Production
To read a PowerShell variable inside a Dockerfile, you can use the ENV instruction in the Dockerfile. You can pass in the PowerShell variable as an environment variable and then access it in the Dockerfile using the syntax $ENVIRONMENT_VARIABLE. For example, if you have a PowerShell variable $var that you want to use in the Dockerfile, you can do the following:
PowerShell:
$var = "hello"
Dockerfile:
ENV VAR $var RUN echo $VAR
This will output hello in the Docker build process as it reads the value of the PowerShell variable $var and assigns it to the Docker environment variable VAR which can be accessed using $VAR within the Dockerfile.
How to store a PowerShell variable value in a Dockerfile?
There are a few ways to store a PowerShell variable value in a Dockerfile:
- Use the ENV instruction in the Dockerfile to set an environment variable with the PowerShell variable value:
ENV MY_VARIABLE=my_value
- Use the RUN instruction in the Dockerfile to set an environment variable with the PowerShell variable value:
RUN powershell -Command $env:MY_VARIABLE = "my_value"
- Use a .env file to store the PowerShell variable value and load it in the Dockerfile:
Create a .env file with the following content:
MY_VARIABLE=my_value
Then, load the .env file in the Dockerfile and set an environment variable with the value:
ARG ENV_FILE ENV_FILE .env RUN powershell -Command $env:MY_VARIABLE = "$env:MY_VARIABLE"
Remember to pass the .env file to the Docker build command:
docker build --build-arg ENV_FILE=.env .
How to retrieve the value of a PowerShell variable in a Dockerfile?
To retrieve the value of a PowerShell variable in a Dockerfile, you can use the ENV directive in the Dockerfile to set an environment variable with the value of the PowerShell variable. Here's an example of how you can do this:
- Set the value of the PowerShell variable in your script:
$myVariable = "Hello, World!"
- Use the ENV directive in your Dockerfile to set an environment variable with the value of the PowerShell variable:
FROM mcr.microsoft.com/windows/nanoserver:1809
ENV MY_VARIABLE=$myVariable
CMD echo %MY_VARIABLE%
- Build your Docker image using the Dockerfile:
docker build -t my-image .
- Run a container from the image and retrieve the value of the environment variable:
docker run my-image
The output should be:
Hello, World!
By following these steps, you can retrieve the value of a PowerShell variable in a Dockerfile.
How to prevent errors when referencing a PowerShell variable in a Dockerfile?
To prevent errors when referencing a PowerShell variable in a Dockerfile, you can follow the below best practices:
- Use double quotes ("") when referencing a variable in PowerShell to ensure that the variable is properly expanded: ARG VARIABLE_NAME ENV ENV_VARIABLE=$VARIABLE_NAME RUN Write-Host "Variable value: $VARIABLE_NAME"
- Make sure to properly define and set the variable using the ARG instruction in the Dockerfile: ARG VARIABLE_NAME=default_value
- Avoid using special characters or spaces in the variable name to prevent any unexpected behavior.
- Test your Dockerfile and verify that the variable is correctly referenced before building the Docker image.
By following these best practices, you can prevent errors when referencing a PowerShell variable in a Dockerfile and ensure a smooth Docker image building process.
What is the method for using a PowerShell variable value directly in a Dockerfile instruction?
To use a PowerShell variable value directly in a Dockerfile instruction, you can first set the variable in your PowerShell script and then use the same variable in the Dockerfile. Here is an example:
- Define a variable in your PowerShell script:
$version = "1.0.0"
- Write the Dockerfile and use the PowerShell variable in a Docker instruction:
FROM microsoft/windowsservercore ARG PS_VERSION LABEL version=$PS_VERSION
- Build the Docker image using the docker build command and pass the PowerShell variable as a build argument:
docker build --build-arg PS_VERSION=$version -t myimage .
This way, the value of the PowerShell variable $version will be passed to the Dockerfile as a build argument and used in the LABEL instruction to label the image.