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openresty-docker-proxy

Uses Openresty - an nginx-compatible server distribution - to proxy requests to other Docker containers based on configured labels.

Usage

Environment Variables

OPENRESTY_APP_LABEL

default: com.dokku.app-name

An docker label to group server blocks by.

OPENRESTY_DEBUG

default: `` (none)

Set to true to enable debugging comments in the generated config files.

OPENRESTY_IGNORE_DEFAULT_DOMAIN

default: true

When true, all requests to a domain where there is a port listener will be ignored. Set to false to allow openresty to handle the default domain normally.

OPENRESTY_LABEL_PREFIX

default: openresty.

The default prefix to use when looking up labels. All examples below assume the default label prefix.

OPENRESTY_LETSENCRYPT_ALLOWED_DOMAINS_FUNC_BASE64

default: return true

The body of a function that returns whether or not the variable domain containing a domain name is allowed to have a letsencrypt ssl certificate provisioned.

OPENRESTY_LETSENCRYPT_EMAIL

default: `` (none)

The email to use for enabling letsencrypt (required).

OPENRESTY_LETSENCRYPT_CA

default: https://acme-v02.api.letsencrypt.org/directory

The certificate authority to use

OPENRESTY_PROCESS_LABEL

default: com.dokku.process-type

A secondary docker label to group process types within servers by.

OPENRESTY_WEB_PROCESS

default: web

The value of the OPENRESTY_PROCESS_LABEL that denotes the primary web process to proxy.

OPENRESTY_DEFAULT_NETWORK

default: bridge

The default network to proxy requests to.

OPENRESTY_OS_PAGESIZE

default: computed on container start

The default os page size to base default proxy values on.

Labels

openresty.access-log-format

The format of the openresty access log for the app.

openresty.access-log-path

The path - in the container - where the access logs will be written.

openresty.bind-address-ipv4

The IPv4 address - in the container - openresty will bind to when proxying requests.

openresty.bind-address-ipv6

The IPv6 address - in the container - openresty will bind to when proxying requests.

openresty.client-max-body-size

The value of client_max_body_size, used for limiting file upload size.

openresty.domains

A space-delimited set of domains to proxy.

openresty.error-log-path

The path - in the container - where the error logs will be written.

openresty.https-port

Port treated as https when parsing port mappings.

openresty.include-grpc-*

openresty.include-location-grpc-*

openresty.include-http-*

openresty.include-location-http-*

openresty.include-tcp-*

openresty.include-udp-*

openresty.initial-network

The network name to use when proxying requests to the app container.

openresty.letsencrypt

When set to true, this enables dynamic SSL certificate provisioning via Let's Encrypt for any https:443 port mappings. Note that the corresponding http:80 port mapping must exist in order for this to succeed.

openresty.port-mapping

Holds a space-delimited set of port mappings, where the port mapping is of the format $scheme:$host_port:$container_port. Supported schemes:

  • grpc/grpcs: For grpc(s) proxying. Only labels that are explicitely called out are supported.
  • tcp/udp: For stream proxying. Only labels that are explicitely called out are supported.
  • http/https: For normal request proxying. Supports most labels unless otherwise specified.

openresty.proxy-buffer-size

Sets the size of the buffer proxy_buffer_size used for reading the first part of the response received from the proxied server. By default proxy buffer size is set as the pagesize.

openresty.proxy-buffering

Enable or disable proxy buffering proxy_buffering. By default proxy buffering is disabled in the NGINX config.

openresty.proxy-buffers

Sets the number of the buffers in proxy_buffers used for reading the first part of the response received from the proxied server. By default proxy buffers number is set as 4

openresty.proxy-busy-buffer-size

Sets the size of the buffer proxy_busy_buffer_size used for reading the first part of the response received from the proxied server. By default proxy busy buffer size is set as twice the pagesize.

openresty.proxy-connecting-timeout

Defines a timeout for connect to a proxied server.

openresty.proxy-read-timeout

Defines a timeout for reading a response from the proxied server.

openresty.proxy-send-timeout

Defines a timeout for sending a request to the proxied server.

openresty.send-timeout

Defines a timeout for sending a response to the client.

openresty.x-forwarded-for-value

openresty.x-forwarded-port-value

openresty.x-forwarded-proto-value

openresty.x-forwarded-ssl

TODO

  • Add documentation for all labels
  • Skip apps without domain
  • Skip apps without proxy port mapping