Adjust health check to return 503 if all backends are down

README.md

@@ -19,7 +19,7 @@ helm repo add appuio https://charts.appuio.ch
 | [![chart downloads](https://img.shields.io/github/downloads/appuio/charts/data-cube-curation-0.3.1/total)](https://github.com/appuio/charts/releases/tag/data-cube-curation-0.3.1) | [data-cube-curation](appuio/data-cube-curation/README.md) |
 | [![chart downloads](https://img.shields.io/github/downloads/appuio/charts/exoip-1.0.4/total)](https://github.com/appuio/charts/releases/tag/exoip-1.0.4) | [exoip](appuio/exoip/README.md) |
 | [![chart downloads](https://img.shields.io/github/downloads/appuio/charts/generic-0.1.2/total)](https://github.com/appuio/charts/releases/tag/generic-0.1.2) | [generic](appuio/generic/README.md) |
-| [![chart downloads](https://img.shields.io/github/downloads/appuio/charts/haproxy-2.4.0/total)](https://github.com/appuio/charts/releases/tag/haproxy-2.4.0) | [haproxy](appuio/haproxy/README.md) |
+| [![chart downloads](https://img.shields.io/github/downloads/appuio/charts/haproxy-2.5.0/total)](https://github.com/appuio/charts/releases/tag/haproxy-2.5.0) | [haproxy](appuio/haproxy/README.md) |
 | [![chart downloads](https://img.shields.io/github/downloads/appuio/charts/mariadb-galera-1.2.4/total)](https://github.com/appuio/charts/releases/tag/mariadb-galera-1.2.4) | [mariadb-galera](appuio/mariadb-galera/README.md) |
 | [![chart downloads](https://img.shields.io/github/downloads/appuio/charts/maxscale-2.0.1/total)](https://github.com/appuio/charts/releases/tag/maxscale-2.0.1) | [maxscale](appuio/maxscale/README.md) |
 | [![chart downloads](https://img.shields.io/github/downloads/appuio/charts/metrics-server-2.12.1/total)](https://github.com/appuio/charts/releases/tag/metrics-server-2.12.1) | [metrics-server](appuio/metrics-server/README.md) |

appuio/haproxy/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 appVersion: 2.7.3
 description: A Helm chart for HAProxy which can be customized by a config map.
 name: haproxy
-version: 2.4.0
+version: 2.5.0
 maintainers:
   - name: APPUiO Team
     email: info@appuio.ch

appuio/haproxy/README.md

@@ -1,6 +1,6 @@
 # haproxy
 
-![Version: 2.4.0](https://img.shields.io/badge/Version-2.4.0-informational?style=flat-square) ![AppVersion: 2.7.3](https://img.shields.io/badge/AppVersion-2.7.3-informational?style=flat-square)
+![Version: 2.5.0](https://img.shields.io/badge/Version-2.5.0-informational?style=flat-square) ![AppVersion: 2.7.3](https://img.shields.io/badge/AppVersion-2.7.3-informational?style=flat-square)
 
 A Helm chart for HAProxy which can be customized by a config map.
 

appuio/haproxy/templates/_helpers.tpl

@@ -31,6 +31,20 @@ Create chart name and version as used by the chart label.
 {{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
 {{- end -}}
 
+{{/*
+Create backendName depending on the selected configuration
+*/}}
+{{- define "haproxy.backendName" -}}
+{{- if eq .Values.haproxy.config "redisk8s" -}}
+redis-nodes
+{{- else if or (eq .Values.haproxy.config "galerak8s") (eq .Values.haproxy.config "galera") -}}
+galera-nodes
+{{- else -}}
+backend
+{{- end -}}
+{{- end -}}
+
+{{/*
 {{/*
 HAProxy config for stats and metrics
 */}}
@@ -43,8 +57,9 @@ frontend stats
   stats uri /stats
   stats refresh 3s
   acl server_stopping stopping
+  acl service_down nbsrv({{ include "haproxy.backendName" . }}) eq 0
   monitor-uri /healthz
-  monitor fail if server_stopping
+  monitor fail if server_stopping || service_down
   option dontlog-normal
   option httplog
   http-request use-service prometheus-exporter if { path /metrics }