How to deploy applications on CentOS
Apr 14, 2025 pm 02:39 PM
Complete Guide to Deploying Docker Applications on CentOS Systems
This article walks you through the steps to deploy Docker applications on a CentOS server, covering the entire process from Docker installation to application management.
Step 1: Install Docker
First, make sure your CentOS system has been updated to the latest version:
sudo yum update -y
Then, install the Docker engine:
sudo yum install -y docker-ce docker-ce-cli containerd.io
Start Docker service and set up booting:
sudo systemctl start docker sudo systemctl enable docker
Step 2: Configure the Docker daemon (optional)
To enhance security and optimize performance, it is recommended to configure the Docker daemon. Create or edit the /etc/docker/daemon.json file and add the following:
{
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
},
"storage-driver": "overlay2"
}
Restart the Docker service to make the configuration take effect:
sudo systemctl restart docker
Step 3: Pull the Docker image
Use the docker pull command to download the required Docker image. For example, to deploy an Nginx web server:
sudo docker pull nginx
Step 4: Run Docker container
Use the docker run command to run the Docker container. The following command starts an Nginx container named my-nginx and maps the host's port 80 to the container's port 80:
sudo docker run --name my-nginx -d -p 80:80 nginx
Step 5: Deploy custom applications (optional)
If you need to deploy your own app, you need to package it into a Docker image. Here is an example of using Python applications:
- Create Dockerfile: Create a file named
Dockerfilein your application directory, the content is as follows:
# Use the official Python basic mirror FROM python:3.9-slim # Set the working directory WORKDIR /app # Copy the application code COPY . /app # Installation dependency RUN pip install --no-cache-dir -r requirements.txt # Exposed port EXPOSE 5000 # Run the application CMD ["python", "app.py"]
- Build the image: Run the following command to build the Docker image:
sudo docker build -t my-app .
- Run the container: Run your application container with the following command:
sudo docker run -d -p 5000:5000 --name my-app-container my-app
Step 6: Verify the deployment
Visit http://:5000 in your browser (if your application listens to port 5000) to verify that your application is running normally.
Step 7: Manage Docker Containers
You can manage Docker containers using the following command:
- View all containers:
sudo docker ps -a - Stop container:
sudo docker stop - Start the container:
sudo docker start - Delete container:
sudo docker rm
Through the above steps, you can successfully deploy and manage Docker applications on a CentOS server. Please adjust the port mapping and Dockerfile configuration according to your actual application requirements.
The above is the detailed content of How to deploy applications on CentOS. For more information, please follow other related articles on the PHP Chinese website!
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