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fix(nginx): Docker DNS resolver + variable proxy_pass for reliable container DNS

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kagentz-bot
2026-06-24 11:41:52 -04:00
parent fd3c2a575a
commit ce703b8328
2 changed files with 42 additions and 123 deletions
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nginx/nginx.conf
+42 -28
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@@ -8,9 +8,23 @@ http {
sendfile on;
keepalive_timeout 65;
upstream router_api { server router:9000; }
upstream dashboard_ui { server dashboard:3000; }
upstream litellm_backend { server litellm:4000; }
# Docker DNS resolver — forces request-time resolution for variable-based proxy_pass.
# Without this, nginx resolves upstream hostnames at config load time,
# which fails when Docker DNS (127.0.0.11) isn't ready yet on container start.
resolver 127.0.0.11 valid=30s;
# Dynamic upstream resolution via nginx variables.
# Using $var in proxy_pass forces request-time resolution through the resolver.
# Without this, 'host not found in upstream' crashes nginx when Docker DNS is slow.
map $host $router_api_url {
default http://harness-router:9000;
}
map $host $dashboard_ui_url {
default http://harness-dashboard:3000;
}
map $host $litellm_backend_url {
default http://harness-litellm:4000;
}
# Detect Cloudflare Tunnel requests (cloudflared always sets CF-Connecting-IP).
# Direct LAN browser access to :4000 has no such header -> redirect to canonical https,
@@ -40,7 +54,7 @@ http {
# 2-Layer: /v1/ → router (existing keys work unchanged)
location /v1/ {
proxy_pass http://router_api;
proxy_pass $router_api_url;
proxy_http_version 1.1;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
@@ -52,7 +66,7 @@ http {
}
location @router_fallback {
proxy_pass http://router_api;
proxy_pass $router_api_url;
proxy_http_version 1.1;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
@@ -61,7 +75,7 @@ http {
}
location /admin/ {
proxy_pass http://router_api;
proxy_pass $router_api_url;
proxy_http_version 1.1;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
@@ -70,7 +84,7 @@ http {
}
location /stream {
proxy_pass http://router_api/stream;
proxy_pass $router_api_url/stream;
proxy_http_version 1.1;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
@@ -80,14 +94,14 @@ http {
}
location /api/ {
proxy_pass http://router_api/;
proxy_pass $router_api_url/;
proxy_http_version 1.1;
proxy_set_header Host $host;
}
# LiteLLM gateway access (agents with new virtual keys)
location /litellm/v1/ {
proxy_pass http://litellm_backend/v1/;
proxy_pass $litellm_backend_url/v1/;
proxy_http_version 1.1;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
@@ -99,14 +113,14 @@ http {
# LiteLLM UI static assets
location /litellm-asset-prefix/ {
proxy_pass http://litellm_backend/litellm-asset-prefix/;
proxy_pass $litellm_backend_url/litellm-asset-prefix/;
proxy_http_version 1.1;
proxy_set_header Host $host;
}
# LiteLLM Admin UI via /litellm/ prefix (LAN/internal access on :80)
location /litellm/ {
proxy_pass http://litellm_backend/;
proxy_pass $litellm_backend_url/;
proxy_http_version 1.1;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
@@ -121,7 +135,7 @@ http {
}
location /dashboard/ {
proxy_pass http://dashboard_ui/;
proxy_pass $dashboard_ui_url/;
proxy_http_version 1.1;
proxy_set_header Host $host;
}
@@ -132,31 +146,31 @@ http {
}
location /metrics/ {
proxy_pass http://router_api/metrics/;
proxy_pass $router_api_url/metrics/;
proxy_http_version 1.1;
proxy_set_header Host $host;
}
location /metrics/circuit-breaker {
proxy_pass http://router_api/metrics/circuit-breaker;
proxy_pass $router_api_url/metrics/circuit-breaker;
proxy_http_version 1.1;
proxy_set_header Host $host;
}
location /router/ {
proxy_pass http://router_api/;
proxy_pass $router_api_url/;
proxy_http_version 1.1;
proxy_set_header Host $host;
}
location /health/unified {
proxy_pass http://router_api/health/unified;
proxy_pass $router_api_url/health/unified;
proxy_http_version 1.1;
proxy_set_header Host $host;
}
location /health {
proxy_pass http://router_api/health;
proxy_pass $router_api_url/health;
proxy_http_version 1.1;
proxy_set_header Host $host;
}
@@ -185,19 +199,19 @@ http {
# LiteLLM Admin UI + WebSocket
location /ui/ {
proxy_pass http://litellm_backend/ui/;
proxy_pass $litellm_backend_url/ui/;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_read_timeout 86400s;
proxy_buffering off;
proxy_redirect http://litellm_backend/ https://litellm.sysloggh.net/;
proxy_redirect $litellm_backend_url/ https://litellm.sysloggh.net/;
proxy_redirect http://litellm.sysloggh.net:4000/ https://litellm.sysloggh.net/;
}
# UI static assets
location /litellm-asset-prefix/ {
proxy_pass http://litellm_backend/litellm-asset-prefix/;
proxy_pass $litellm_backend_url/litellm-asset-prefix/;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
@@ -205,14 +219,14 @@ http {
# SSO callback
location /sso/ {
proxy_pass http://litellm_backend/sso/;
proxy_pass $litellm_backend_url/sso/;
proxy_http_version 1.1;
proxy_read_timeout 600s;
}
# API
location /v1/ {
proxy_pass http://litellm_backend/v1/;
proxy_pass $litellm_backend_url/v1/;
proxy_http_version 1.1;
proxy_set_header Authorization $http_authorization;
proxy_read_timeout 600s;
@@ -221,35 +235,35 @@ http {
# Key management + admin API
location /key/ {
proxy_pass http://litellm_backend/key/;
proxy_pass $litellm_backend_url/key/;
proxy_http_version 1.1;
proxy_set_header Authorization $http_authorization;
}
location /user/ {
proxy_pass http://litellm_backend/user/;
proxy_pass $litellm_backend_url/user/;
proxy_http_version 1.1;
proxy_set_header Authorization $http_authorization;
}
location /model/ {
proxy_pass http://litellm_backend/model/;
proxy_pass $litellm_backend_url/model/;
proxy_http_version 1.1;
proxy_set_header Authorization $http_authorization;
}
location /team/ {
proxy_pass http://litellm_backend/team/;
proxy_pass $litellm_backend_url/team/;
proxy_http_version 1.1;
proxy_set_header Authorization $http_authorization;
}
# Health
location /health {
proxy_pass http://litellm_backend/health;
proxy_pass $litellm_backend_url/health;
proxy_http_version 1.1;
}
# Root + everything else → LiteLLM (UI index, /configs, /spend, etc.)
location / {
proxy_pass http://litellm_backend/;
proxy_pass $litellm_backend_url/;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";