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also log healthchecks for grafana alarms #159

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Merged
ssundahlTTD merged 1 commit into from
Jan 7, 2026
Merged

also log healthchecks for grafana alarms #159

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25 changes: 19 additions & 6 deletions tools/reverse-proxy/nginx.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -12,17 +12,30 @@ http {
include /etc/nginx/mime.types;
default_type application/octet-stream;

# Log format for errors (4xx and 5xx) - excludes successful requests
# Dimensions: IP, timestamp, method, request URL (includes query string), status, referrer
log_format errors_only '$remote_addr [$time_local] $request_method "$request_uri" $status "$http_referer"';
# Log format - includes IP, timestamp, method, URL, status, referrer
log_format main '$remote_addr [$time_local] $request_method "$request_uri" $status "$http_referer"';

# Map to conditionally log only 4xx and 5xx errors
map $status $log_errors_only {
# Map to identify errors (4xx/5xx)
map $status $is_error {
~^[45] 1;
default 0;
}

access_log /var/log/nginx/access.log errors_only if=$log_errors_only;
# Map to identify healthcheck requests
map $request_uri $is_healthcheck {
~^/ops/healthcheck 1;
default 0;
}

# Combine: log if error OR healthcheck
map "$is_error:$is_healthcheck" $should_log {
"1:0" 1;
"1:1" 1;
"0:1" 1;
default 0;
}

access_log /var/log/nginx/access.log main if=$should_log;

sendfile on;

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