README.md

prerender-docker

Lightweight Prerender container built on Alpine Linux with Node and Headless Chrome.

• Prerender ^5.20
• Chromium 102.0.5005.182
• Node 18.x

Requirements

• Docker

Usage

Pull and run the image:

docker pull veneliniliev/prerender-docker:1.0.6
docker run -p 3000:3000 veneliniliev/prerender-docker:1.0.6

Prerender will now be running on http://localhost:3000. Try the container out with curl:

curl http://localhost:3000/render?url=https://www.example.com/

Prerender plugins

A few default plugins have been activated by default (see server.js):

• https://github.com/prerender/prerender/blob/master/lib/plugins/blacklist.js
  • plugin is not activated by default
  • env: BLACKLISTED_DOMAINS="blocked.domain.com"
• https://github.com/prerender/prerender/blob/master/lib/plugins/sendPrerenderHeader.js
• https://github.com/prerender/prerender/blob/master/lib/plugins/blockResources.js
• https://github.com/prerender/prerender/blob/master/lib/plugins/httpHeaders.js
• https://github.com/prerender/prerender/blob/master/lib/plugins/blockResources.js
• https://github.com/prerender/prerender/blob/master/lib/plugins/removeScriptTags.js
• https://github.com/prerender/prerender/blob/master/lib/plugins/whitelist.js
  • plugin is not activated by default
  • env: ALLOWED_DOMAINS="allowed.domain.com"

This can be modified by creating your own server.js and mounting this file as a docker volume:

docker run -p 3000:3000 -v $(pwd)/server.js:/home/node/server.js veneliniliev/prerender-docker:1.0.6

Prerender redis cache

The prerender-redis-cache plugin is not activated by default. You can activate it with one of environment variables REDISTOGO_URL || REDISCLOUD_URL || REDISGREEN_URL || REDIS_URL.

You can customize cache behavior with environment variables:

• PAGE_TTL=8600 : time to live in seconds

docker run --network=host -p 3000:3000 -e REDIS_URL=redis://127.0.0.1:6379/0 veneliniliev/prerender-docker:1.0.6 

Prerender memory cache

The prerender-memory-cache plugin is not activated by default. You can activate it with the environment variable MEMORY_CACHE=1.

You can customize cache behavior with environment variables:

• CACHE_MAXSIZE=1000 : max number of objects in cache
• CACHE_TTL=6000 : time to live in seconds

docker run -p 3000:3000 -e MEMORY_CACHE=1 -e CACHE_MAXSIZE=1000 -e CACHE_TTL=6000 veneliniliev/prerender-docker:1.0.6 

Prerender documentation

Check out the official Prerender documentation: https://github.com/prerender/prerender