docbrown/docs/installation/imgproxy.md
2021-06-28 09:10:36 -05:00

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---
title: Imgproxy
---
# Imgproxy
Imgproxy is a standalone server for resizing images. It is optional and you do
not need it to start Forem locally. We are currently only using it in Forem
Cloud.
## Installation
- MacOS: install via homebrew with `brew install imgproxy`.
- Windows: please install
[via docker](https://docs.imgproxy.net/#/installation?id=docker).
- Linux: you can either use
[docker installation](https://docs.imgproxy.net/#/installation?id=docker) or
[build from source](https://docs.imgproxy.net/#/installation?id=from-the-source).
For more options not covered here, please take a look at the
[official installation documentation](https://docs.imgproxy.net/#/installation).
## Usage
1. Generate a key/salt pair by running the following in your terminal twice.
Copy those values to your `.env` in the next step
```
echo $(xxd -g 2 -l 64 -p /dev/random | tr -d '\n')
```
1. In your `.env`, add the following.
```
export IMGPROXY_ENDPOINT='http://localhost:8080'
export IMGPROXY_KEY='1b1c9aae804e070b0864f2547fba7ce8ff31bf7..........'
export IMGPROXY_SALT='8c6d449d4fc2cada5bab538826cae709d2ade9f.........'
```
1. Start the Forem app server normally.
1. Start Imgproxy in a terminal with the key and salt.
```
# If you installed via homebrew or using the binary.
> IMGPROXY_KEY='your key' IMGPROXY_SALT='your salt' imgproxy
# If you are using Docker or Podman. The commands are identical for both
> docker run -p 8080:8080 \
-e IMGPROXY_KEY="your key" \
-e IMGPROXY_SALT="your salt" \
-it darthsim/imgproxy
```
1. That's it :)
You should verify it's working by starting the Forem app locally and see that
each image is loaded properly, or run the following command while the Forem app
is running:
```
> curl -I http://localhost:8080/unsafe/aHR0cDovL2xvY2Fs/aG9zdDozMDAwL2Fz/c2V0cy8xLnBuZw
HTTP/1.1 200 OK
Server: imgproxy
X-Request-Id: GYvCGXb98JUwL3ujwpjzh
Date: Tue, 27 Oct 2020 16:11:37 GMT
```
## Sidenote
- Because Imgproxy is a standalone server of its own, all image URLs given to it
need to be absolute URLs.
- When working with Docker or Podman on Linux, provide the host network option
(`--network="host"`) so Imgproxy can properly access the localhost.