Step-by-Step Guide: Installing Docker on CentOS 7 and Deploying a .NET Core + Angular2 App

Install Docker on CentOS 7

Update the system, add the official Docker repository, install the Docker Engine, enable it to start on boot, and verify the installation.

yum update -y

# Create the repository file
cat > /etc/yum.repos.d/docker.repo <<'EOF'
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/7/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
EOF

# Install Docker Engine
yum install -y docker-engine

# Enable and start the service
systemctl enable docker.service
systemctl start docker

# Verify with the hello‑world image
docker run --rm hello-world

Prepare a .NET Core + Angular 2 Application for Docker

Copy the existing project directory to a new folder that will be used as the Docker build context. cp -r acore/* dockerapp/ Create a Dockerfile that uses the exact .NET Core runtime version required by the application (1.0.1) and makes the application listen on all interfaces ( 0.0.0.0) so that it is reachable from outside the container.

FROM microsoft/dotnet:1.0.1-core
RUN mkdir /app/
COPY . /app/
WORKDIR /app
EXPOSE 4000
CMD ["dotnet", "acore.dll", "--server.urls", "http://0.0.0.0:4000"]

Build and Run the Docker Image

Build the image with a tag, then start a container mapping the host port 8000 to the container port 4000.

# Build the image (note the trailing dot for the build context)
docker build -t dockerapp:1.0 .

# List images to confirm
docker images

# Run the container
docker run --name dockerapp -d -p 8000:4000 dockerapp:1.0

# Verify the container is running
docker ps -a

Configure Nginx as a Reverse Proxy

Update the Nginx server block to proxy HTTP traffic to http://127.0.0.1:8000 (the host‑side port mapped to the container) and reload the service.

# Example snippet for /etc/nginx/conf.d/dockerapp.conf
server {
    listen 80;
    location / {
        proxy_pass http://127.0.0.1:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}

# Reload Nginx
service nginx restart

Verification

Open a web browser and navigate to http://<host>:8000 (or the domain configured in Nginx). The .NET Core application should be served through Nginx, confirming that the Docker deployment and reverse‑proxy configuration are successful.