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In this guide, we will see how to restart all the containers with an example.
Why Restart Containers?
There are several reasons why you might need to restart a Docker container:
Application Updates: If you've just updated the application running inside a container, a restart can help apply those changes.
Recovery: If containers face issues, a simple restart often brings them back to normal operation.
Configuration Updates: Post configuration changes, a restart ensures containers run with the latest settings.
Command to Restart Containers
The primary command to restart a container is as straightforward as:
docker restart [OPTIONS] CONTAINER [CONTAINER...]
Restarting a Single Container:
To restart a single container, simply specify its name or ID:
docker restart my_container_name
Or
docker restart my_container_id
Restarting Multiple Containers:
You can list down multiple container names or IDs:
docker restart my_container_1 my_container_2 my_container_3
Step-by-Step Example
1. Creating a Docker Image
For our example, we'll use a simple Node.js application, but the process applies to any application you'd want to dockerize.FROM node:14
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 8080
CMD ["node", "server.js"]
2. Building the Image
With our Dockerfile ready, it's time to create an image:
docker build -t my-node-app:latest .
3. Starting the Container
With our image built, let's start a container:
docker run -d -p 8080:8080 my-node-app:latest
4. Restarting All Containers
After doing some changes in the node app in a container, you can restart the container by using the following command:
docker restart $(docker ps -a -q)
Here, docker ps -a -q lists all containers, and docker restart ensures they're all restarted.
Conclusion
Related Container Management Guides
- Docker Create Container
- Docker Stop All Containers
- Docker Remove All Stopped Containers
- Docker Start Container
- Docker Restart All Containers
- Docker Go Inside Container - The docker exec Command
- Docker List Containers
- Docker Fetching Logs from Containers
- Docker Rename Container
- Docker Remove Unused Containers
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