From 254f3a061094e5a11a17f502402d46868e802658 Mon Sep 17 00:00:00 2001
From: Simon Prinz <simon.prinz@live.de>
Date: Sat, 5 Dec 2020 19:03:28 +0100
Subject: [PATCH] add source code from local folder

---
 Caddyfile            |  6 ++++++
 Dockerfile           |  7 +++++++
 README.md            | 12 +++++++++++-
 generateCaddyfile.sh |  9 +++++++++
 4 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 Caddyfile
 create mode 100644 Dockerfile
 create mode 100644 generateCaddyfile.sh

diff --git a/Caddyfile b/Caddyfile
new file mode 100644
index 0000000..1a9ff4f
--- /dev/null
+++ b/Caddyfile
@@ -0,0 +1,6 @@
+:80 {
+	reverse_proxy {
+		to HOSTS
+		lb_policy round_robin
+	}
+}
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..c5e1fe3
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,7 @@
+FROM caddy:2-alpine
+WORKDIR /app
+
+COPY Caddyfile .
+COPY generateCaddyfile.sh .
+
+CMD ["./generateCaddyfile.sh"]
diff --git a/README.md b/README.md
index 71fd5d6..1da1fee 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,12 @@
 # CaddyBalancer
- A Docker image for load balancing based on Caddy
+
+A Docker image for load balancing based on Caddy
+
+## Usage
+
+```bash
+docker run -d \
+    -p 8080:80 \
+    -e UPSTREAMS="http://12.34.56.78:9999,http://98.76.54.32:1111" \
+    docker.pkg.github.com/simonprinz/caddybalancer/caddybalancer:latest
+```
diff --git a/generateCaddyfile.sh b/generateCaddyfile.sh
new file mode 100644
index 0000000..c81ba50
--- /dev/null
+++ b/generateCaddyfile.sh
@@ -0,0 +1,9 @@
+#!/bin/sh
+
+# generate Caddyfile
+hosts=`echo "$UPSTREAMS" | sed "s|,|\\\\\\n\\t\\tto |"`
+sed -i "s|HOSTS|$hosts|" Caddyfile
+cat Caddyfile
+
+# run caddy
+caddy run --config /app/Caddyfile --adapter caddyfile