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Velocita Proxy Docker image

Velocita acts as a caching reverse proxy to Composer repositories.

Combined with composer-velocita, it increases the performance of a composer install when a local cache is not yet available and makes sure packages can be downloaded even if the source location is experiencing issues.

Running the proxy

Start a proxy for Packagist and GitHub, listening on port 80:

docker run -d --name velocita -p 80:8080 \
    -e MIRROR_PACKAGIST_URL=https://repo.packagist.org \
    -e MIRROR_PACKAGIST_TYPE=composer \
    -e MIRROR_GITHUB_CODELOAD_URL=https://codeload.github.com \
    isaaceindhoven/velocita-proxy

Go ahead and visit http://localhost/mirror/packagist/packages.json - this should now give you the Packagist index!

Configuring Velocita

Velocita configures itself with the environment variables you pass.

Environment variable Required Type Description
VELOCITA_URL No URL (default: http://localhost) The URL at which Velocita is reachable
VELOCITA_TLS_ENABLED No One of: true, false (default) Enable HTTPS
VELOCITA_AUTH_TYPE No One of: none (default), basic Enable HTTP authentication

Configuring mirrors

A mirror is added if you pass a variable of the form MIRROR_{name}_URL, and is configured with additional MIRROR_{name}_* variables.

When you add a Composer repository, make sure you set MIRROR_{name}_TYPE to composer so the correct cache invalidation is applied.

For example, this will proxy two different Composer repositories:

docker run -d --name velocita -p 80:8080 \
    -e MIRROR_WPACKAGIST_URL=https://wpackagist.org \
    -e MIRROR_WPACKAGIST_TYPE=composer \
    -e MIRROR_FIREGENTO_URL=https://packages.firegento.com \
    -e MIRROR_FIREGENTO_TYPE=composer \
    isaaceindhoven/velocita-proxy

For every mirror, the following configuration options are available:

Environment variable Required Type Description
MIRROR_{name}_URL Yes URL The URL of the upstream server to proxy
MIRROR_{name}_TYPE No One of: simple (default), composer The mirror type
MIRROR_{name}_CACHE_EXPIRY No Time (default: 3650d) Time after which cached items expire
MIRROR_{name}_CACHE_SIZE No Size (default: 1g) Maximum size of this mirror's cache
MIRROR_{name}_ALLOW_REVALIDATE No Boolean (default: false) Allow revalidation of cached items
MIRROR_{name}_PACKAGES_JSON_EXPIRY No Time (default: 2m) Time after which packages.json expires
MIRROR_{name}_AUTH_TYPE No One of: basic (default), bearer Type of upstream authentication
MIRROR_{name}_AUTH_USERNAME No String Username for authentication
MIRROR_{name}_AUTH_PASSWORD No String Password or token for authentication
MIRROR_{name}_USER_AGENT No String User Agent header sent to upstream

For time and size unit syntax, see: http://nginx.org/en/docs/syntax.html

Configuring the storage volume

Inside the container, all cache files are stored in a volume mounted on /var/cache/velocita. Use -v to mount this volume somewhere on your host's filesystem:

docker run -d --name velocita -p 80:8080 \
    -e MIRROR_PACKAGIST_URL=https://repo.packagist.org \
    -e MIRROR_PACKAGIST_TYPE=composer \
    -v /path/on/host:/var/cache/velocita \
    isaaceindhoven/velocita-proxy

Enabling HTTPS

  • Open up port 443
  • Update VELOCITA_URL to use https://
  • Set VELOCITA_TLS_ENABLED to true
  • Provide your X.509 PEM-encoded certificate (or chain) and key file inside the container at /etc/nginx/server.crt and /etc/nginx/server.key
docker run -d --name velocita -p 80:8080 -p 443:8443 \
    -e VELOCITA_URL=https://localhost \
    -e VELOCITA_TLS_ENABLED=true \
    -e MIRROR_PACKAGIST_URL=https://repo.packagist.org \
    -e MIRROR_PACKAGIST_TYPE=composer \
    -v /path/to/certificate.crt:/etc/nginx/server.crt \
    -v /path/to/keyfile.pem:/etc/nginx/server.key \
    isaaceindhoven/velocita-proxy

HTTP requests will be redirected to HTTPS.

Enabling basic authentication

  • Set VELOCITA_AUTH_TYPE to basic
  • Provide a Nginx-compatible htpasswd file inside the container at /etc/nginx/users.htpasswd