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fix(nginx): use Docker embedded DNS resolver to avoid startup DNS failure

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nginx resolves upstream hostnames at config load time, which fails when
sibling containers haven't registered with the Docker DNS yet. Using
resolver 127.0.0.11 with set $upstream defers resolution to request
time, preventing the "host not found in upstream" startup crash.
This commit is contained in:
Zac Gaetano 2026-05-16 08:44:50 -04:00
parent af9c9dbae4
commit f5abf359fb
1 changed files with 9 additions and 2 deletions
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11
services/web-ui/nginx.conf
View file

@ -2,6 +2,11 @@ server {
listen 80;
server_name _;
# Docker embedded DNS — defers upstream resolution to request time
# This prevents nginx crashing at startup if sibling containers aren't
# ready yet (which happens on the first `docker compose up`).
resolver 127.0.0.11 valid=10s ipv6=off;
# Allow unlimited client upload size
client_max_body_size 0;
@ -27,8 +32,9 @@ server {
# API proxy - forward to mam-api service
location /api/ {
set $api_upstream http://mam-api:3000;
client_max_body_size 0;
proxy_pass http://mam-api:3000;
proxy_pass $api_upstream;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
@ -45,7 +51,8 @@ server {
# Capture proxy - forward to capture service
location /capture/ {
proxy_pass http://capture:3001;
set $capture_upstream http://capture:3001;
proxy_pass $capture_upstream;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";