Configure CDN

This page shows how to fine-tune CDN. The default COMAC CDN in this release is working well. However, if want more features or customize the default COMAC CDN, please refer to this page.

CDN-Remote configuration

In the CDN-Remote Helm chart, there are two types of Docker images: (i) Ant Media image and (ii) video archive image.

Update Ant Media images

The Ant Media image has Ant Media community version 1.7.0. If want to use the latest Ant Media or commercial Ant Media, feel free to make a new container. Then, replace the official Ant Media image with the new container. In order to replace the image, make a YAML file such as cdn_var.yaml. Then, describe a new image path like below:

images:
  tags:
    antMedia: <PUT_NEW_IMAGE_HERE>

After that, deploy CDN-Remote with the following command:

• In the multi-cluster environment:

helm install cord/cdn-remote \
  --kube-context central \
  --namespace omec \
  --name cdn-remote \
  --values /path/to/cdn_var.yaml

• In the single-cluster environment:

helm install cord/cdn-remote \
  --namespace omec \
  --name cdn-remote \
  --values /path/to/cdn_var.yaml

Change video clips

Currently not allowed. If must change video clips, then make a new image based on the official video archive image to have new video clips. However, there are following constraints:

• The video clips must be located in /opt/cdn/movies
• The video clips must be named as {360, 480, 720}.mp4 like the official image.
• The video clips should be encoded with H.264.

For the flexible CDN, new patch sets will be merged to allow CDN-Remote to use different video clips.

CDN-Local configuration

CDN-Local has a single container, NGINX container. NGINX has enumerable configuration values. Among them, CDN-Local allow users possible to modify some configuration values, which is defined in /path/to/helm-charts/cdn-services/cdn-local/values.yaml file like below:

...
events:
  workerProcesses: 1
  workerConnections: 1024
http:
  defaultType: application/octet-stream
  sendfile: "on"
  keepaliveTimeout: 65
  server:
    serverName: localhost
    location:
      root: html
      index: index.html index.htm
    error:
      code: 500 502 503 504
      page: /50x.html
      root: html
rtmp:
  chunkSize: 4000
  appRemote:
    live: "on"
  appLocal:
    movieLocation: /opt/cdn/movies
...

If above values should be modified, please make YAML file, e.g., cdn_var.yaml, and override those variables like below block:

# cdn_var.yaml file
config:
  nginx:
    events:
      workerProcesses: 1
      workerConnections: 1024
    http:
      defaultType: application/octet-stream
      sendfile: "on"
      keepaliveTimeout: 65
      server:
        serverName: localhost
        location:
          root: html
          index: index.html index.htm
        error:
          code: 500 502 503 504
          page: /50x.html
          root: html
    rtmp:
      chunkSize: 4000
      appRemote:
        live: "on"
      appLocal:
        movieLocation: /opt/cdn/movies

When cdn_var.yaml is ready, please deploy CDN-Local with the file:

• In the multi-cluster environment:

helm install cord/cdn-local \
  --kube-context edge \
  --namespace omec \
  --name cdn-local \
  --values /path/to/cdn_var.yaml

• In the single-cluster environment:

helm install cord/cdn-local \
  --namespace omec \
  --name cdn-local \
  --values /path/to/cdn_var.yaml

Of course, possible to add more NGINX configuration values directly on path/to/helm-charts/cdn-services/cdn-local/templates/configmap-nginx.yaml file. In the file, there is a data.nginx.conf section, which generates the file including NGINX configuration values.

See here to know overall NGINX configuration values.

Disable SR-IOV

The COMAC CDN is running only with SR-IOV CNI. However, will make the COMAC CDN be operating with various CNI.

Getting help

Please tell woojoong.kim on CORD Slack channel if you see any problem.