From 8779d765836718ebe968f9f172ae8f05e7479165 Mon Sep 17 00:00:00 2001
From: Marc Cataford <mcat@riseup.net>
Date: Sun, 29 Sep 2024 23:18:56 -0400
Subject: [PATCH] feat: add otel tracing

---
 Caddyfile        | 10 ++++++++--
 caddy.Dockerfile |  4 ++++
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/Caddyfile b/Caddyfile
index ff09ac4..5a9f9f5 100644
--- a/Caddyfile
+++ b/Caddyfile
@@ -15,7 +15,13 @@
 
 (application_base) {
 	import application_logging {args[0]}
-	reverse_proxy host.containers.internal:{args[1]}
+
+    tracing {
+        span api
+    }
+
+    reverse_proxy host.containers.internal:{args[1]}
+
 }
 
 (internal_base) {
@@ -24,7 +30,7 @@
 }
 
 {
-	log default {
+    log default {
 		output stdout
 		output file /var/log/caddy/caddy_main.log {
 			roll_size 100MiB
diff --git a/caddy.Dockerfile b/caddy.Dockerfile
index 4e70a86..de0667f 100644
--- a/caddy.Dockerfile
+++ b/caddy.Dockerfile
@@ -4,3 +4,7 @@ RUN apk update && \
     apk add nss-tools
 
 COPY ./Caddyfile /etc/caddy
+
+ENV OTEL_EXPORTER_OTLP_ENDPOINT=otlp://host.containers.internal:4318
+ENV OTEL_EXPORTER_OTLP_TRACES_ENDPOINT=otlp://host.containers.internal:4318
+ENV OTEL_EXPORTER_OTLP_INSECURE=true