Static Content Provider (CDN Origin / CDN)

A project consisting of an ASP.NET Core project that has an assigned role of being a static content provider.
Could easily be used in regards to CDN as a CDN origin for Cloudflare, AWS Cloudfront, Azure CDN, Cloud CDN and many more.

Docker Setup

Environment variables

CACHECONTROL_MAXAGE (double, default value is 12)
CACHECONTROL_MAXAGE_TIMEUNIT (enum, default value is Hours)
CACHECONTROL_SHAREDMAXAGE (double, default value is 168)
CACHECONTROL_SHAREDMAXAGE_TIMEUNIT (enum, default value is Hours)
CDNROOT_DEFAULTFILES (semi-colon-delimited string, default value is default.htm;default.html;index.htm;index.html)
CDNROOT (filePath to the static files that need to be published, default value is /cdnroot)
ETAG_BYTESTOREAD (int, default value is 2147483647 (strong validation))

For CACHECONTROL_MAXAGE_TIMEUNIT and CACHECONTROL_SHAREDMAXAGE_TIMEUNIT the allowed values are:

• Days
• Hours
• Minutes
• Seconds
• Milliseconds
• Tics

CDNROOT_DEFAULTFILES is used to activate the search for a default document, that will be served as default content.

For large files ETAG_BYTESTOREAD could be set to reduce how many bytes is being read per file.

Do note, that if a file is read in its entirely, a strong ETag header value is generated; otherwise a weak ETag header value is generated.

Embed files in image

FROM codebeltnet/web-cdn-origin:1.2.1

WORKDIR /cdnroot
ADD cdnroot .

WORKDIR /app

docker build -t yourAmazingImage:SomeTag -f Dockerfile .
docker run --name cdn-origin -d -p 8000:80 yourAmazingImage:SomeTag

Mount volume to image

docker run --name cdn-origin -d -p 8000:80 -v some-path-with-static-files:/cdnroot codebeltnet/web-cdn-origin:1.2.1

Kubernetes Setup

Running in Docker Desktop with mounted volume

apiVersion: apps/v1
kind: Deployment
metadata:
  name: codebelt-net
  labels:
    app: codebelt-net
spec:
  replicas: 1
  selector:
    matchLabels:
      app: codebelt-net
  template:
    metadata:
      labels:
        app: codebelt-net
    spec:
      restartPolicy: Always
      containers:
      - name: codebelt-net
        image: codebeltnet/web-cdn-origin:1.2.1
        env:
          - name: CACHECONTROL_SHAREDMAXAGE
            value: "24"
          - name: ETAG_BYTESTOREAD
            value: "512"
        ports:
        - containerPort: 80
        volumeMounts:
        - name: staticfiles
          mountPath: /cdnroot
      volumes:
        - name: staticfiles
          hostPath:
            type: Directory
            path: /run/desktop/mnt/host/c/codebelt-net/cdnroot

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