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feat(nginx): generate 502 config for apps without web listeners

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When an app has no web listeners (not yet deployed, no web process type,
or web processes not running), generate a minimal nginx config that
returns 502 Bad Gateway instead of having no config at all. This ensures
domains resolve, monitoring tools detect non-200 status codes, and SSL
certificate provisioning tools like letsencrypt can function.
This commit is contained in:
Jose Diaz-Gonzalez
2026-04-24 02:10:30 -04:00
parent 71ec612fbd
commit 2993fa800c
6 changed files with 218 additions and 11 deletions
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12
plugins/nginx-vhosts/templates/nginx.conf.sigil
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@@ -26,6 +26,7 @@ server {
}
{{ else }}
location / {
{{ if $.DOKKU_APP_WEB_LISTENERS }}
gzip on;
gzip_min_length 1100;
@@ -51,6 +52,9 @@ server {
proxy_set_header X-Forwarded-Proto {{ $.PROXY_X_FORWARDED_PROTO }};
proxy_set_header X-Request-Start $msec;
{{ if $.PROXY_X_FORWARDED_SSL }}proxy_set_header X-Forwarded-Ssl {{ $.PROXY_X_FORWARDED_SSL }};{{ end }}
{{ else }}
return 502;
{{ end }}
}
client_max_body_size {{ $.CLIENT_MAX_BODY_SIZE }};
@@ -103,6 +107,7 @@ server {
send_timeout {{ $.SEND_TIMEOUT }};
location / {
{{ if $.DOKKU_APP_WEB_LISTENERS }}
gzip on;
gzip_min_length 1100;
@@ -129,6 +134,9 @@ server {
proxy_set_header X-Forwarded-Proto {{ $.PROXY_X_FORWARDED_PROTO }};
proxy_set_header X-Request-Start $msec;
{{ if $.PROXY_X_FORWARDED_SSL }}proxy_set_header X-Forwarded-Ssl {{ $.PROXY_X_FORWARDED_SSL }};{{ end }}
{{ else }}
return 502;
{{ end }}
}
client_max_body_size {{ $.CLIENT_MAX_BODY_SIZE }};
@@ -159,6 +167,7 @@ server {
include {{ $.DOKKU_ROOT }}/{{ $.APP }}/nginx.conf.d/*.conf;
}
{{ else if eq $scheme "grpc"}}
{{ if $.DOKKU_APP_WEB_LISTENERS }}
server {
{{ if eq $.HTTP2_DIRECTIVE_SUPPORTED "true" }}
listen [{{ $.NGINX_BIND_ADDRESS_IP6 }}]:{{ $listen_port }};
@@ -179,7 +188,9 @@ server {
client_max_body_size {{ $.CLIENT_MAX_BODY_SIZE }};
include {{ $.DOKKU_ROOT }}/{{ $.APP }}/nginx.conf.d/*.conf;
}
{{ end }}
{{ else if eq $scheme "grpcs"}}
{{ if $.DOKKU_APP_WEB_LISTENERS }}
server {
{{ if eq $.HTTP2_DIRECTIVE_SUPPORTED "true" }}
listen [{{ $.NGINX_BIND_ADDRESS_IP6 }}]:{{ $listen_port }} ssl;
@@ -208,6 +219,7 @@ server {
}
{{ end }}
{{ end }}
{{ end }}
{{ if $.DOKKU_APP_WEB_LISTENERS }}
{{ range $upstream_port := $.PROXY_UPSTREAM_PORTS | split " " }}