Prerender PM2 FSCache Server

This runs prerender as a PM2 cluster, and efficiently caches the results to the filesystem using prerender-plugin-fscache.

bikeshopi-prerender-staging  | 2025-02-21T23:20:11.550Z [fscache] Caching https://b.org/b/x9StaGQ3 to /tmp/prerender-cache/c3/c367c69bb9b5b77b4718f528902984ae23071866
8f528902984ae23071866
bikeshopi-prerender-staging  | 2025-02-21T23:20:19.850Z [fscache] Serving https://b.org/b/x9StaGQ3 from /tmp/prerender-cache/c3/c367c69bb9b5b77b4718f528902984ae23071866

ecosystem.config.js and server.js are both are mounted from your local filesystem so you can adjust as required and restart using Docker Compose.

Environmental Variables for docker-compose.yml

IMAGE=prerender
CONTAINER_NAME=prerender
VIRTUAL_HOST=b.org
LETSENCRYPT_HOST=b.org  # Uses nginxproxy/acme-companion
PHANTOM_WORKERS=3
CACHE_VOLUME=prerender-cache  # docker volume create prerender-cache

# optional env variables
LETSENCRYPT_TEST=false
PHANTOM_WORKERS=4
CACHE_STATUS_CODES=200,301,302,303,304,307,308,404
CACHE_TTL=86400 

Prender Cache Volume

The cache is mounted on an external named volume for persistance.

PM2 Monit

To monitor PM2 processes, run:

docker compose exec prerender pm2 monit