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fix: Nginx resolver for Docker DNS — prevent stale upstream IPs

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Use Docker embedded DNS (127.0.0.11) with 30s TTL and variable-based
proxy_pass so nginx re-resolves the API container IP after recreates
instead of caching the startup IP forever.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
jlightner 2026-03-30 05:55:42 -05:00
parent c6f69019cf
commit 08d7d19d0e
1 changed files with 9 additions and 3 deletions
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12
docker/nginx.conf
View file

@ -4,14 +4,19 @@ server {
root /usr/share/nginx/html; root /usr/share/nginx/html;
index index.html; index index.html;
# Use Docker's embedded DNS with 30s TTL so upstream IPs refresh
# after container recreates
resolver 127.0.0.11 valid=30s ipv6=off;
# SPA fallback # SPA fallback
location / { location / {
try_files $uri $uri/ /index.html; try_files $uri $uri/ /index.html;
} }
# API proxy # API proxy — variable forces nginx to re-resolve on each request
location /api/ { location /api/ {
proxy_pass http://chrysopedia-api:8000; set $backend http://chrysopedia-api:8000;
proxy_pass $backend;
proxy_set_header Host $host; proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
@ -19,6 +24,7 @@ server {
} }
location /health { location /health {
proxy_pass http://chrysopedia-api:8000; set $backend http://chrysopedia-api:8000;
proxy_pass $backend;
} }
} }