CDN Infrastructure

PlayTelly's CDN stack runs as a set of Castis microservices orchestrated via cdn.yml in the Quickstart compose. All services are linux/amd64 binaries running under Rosetta on Mac M-series for local dev, and on Rocky Linux 9 x86_64 in production.

Services

Service	Image	Purpose
streamer_bkk	cdn/streamer	Castis Streamer — DASH/HLS origin, Bangkok node
streamer_ntb	cdn/streamer	Castis Streamer — DASH/HLS origin, Nonthaburi node
cproxy_bkk_1	cproxy:v1	cproxy — caching reverse proxy in front of streamers
elb_bkk	elb:v1	Castis ELB — load balancer in front of cproxy nodes
colorbars	cdn/colorbars	ffmpeg UDP multicast broadcaster (live channel testing)

Architecture

Client
  └── ELB (elb_bkk :38090)
        └── cproxy (cproxy_bkk_1 :28080)
              ├── streamer_bkk (:18080)  ← /bkk/* routes
              └── streamer_ntb (:19080)  ← /ntb/* routes
                    └── SeaweedFS S3 (http-remote fallback)

CoreAPI's distribution domain manages all nodes — streamers, caches, and ELBs are registered in the database and controlled via their respective APIs.

Networks

Network	Purpose
internal	All services — CoreAPI, DB, SeaweedFS, CDN
cdn_net	CDN-only — streamers + colorbars for UDP multicast

See Also

• Streamer
• cproxy
• ELB