feature(helm): Added template support for config and collector files

helm/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 name: sql-exporter
 description: Database-agnostic SQL exporter for Prometheus
 type: application
-version: 0.10.2
+version: 0.11.0
 appVersion: 0.17.0
 keywords:
   - exporter

helm/README.md

@@ -1,6 +1,8 @@
 # sql-exporter
 
-![Version: 0.10.2](https://img.shields.io/badge/Version-0.10.2-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.17.0](https://img.shields.io/badge/AppVersion-0.17.0-informational?style=flat-square)
+
+
+![Version: 0.11.0](https://img.shields.io/badge/Version-0.11.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.17.0](https://img.shields.io/badge/AppVersion-0.17.0-informational?style=flat-square) 
 
 Database-agnostic SQL exporter for Prometheus
 
@@ -14,6 +16,9 @@ Database-agnostic SQL exporter for Prometheus
 | ---- | ------ | --- |
 | Nikolai Rodionov | <[email protected]> | <https://badhouseplants.net> |
 
+
+
+
 ## Installing the Chart
 
 To install the chart with the release name `sql-exporter`:
@@ -86,6 +91,7 @@ as an example.
 | logFormat | string | `"logfmt"` | Set log format (logfmt if unset) |
 | reloadEnabled | bool | `false` | Enable reload collector data handler (endpoint /reload) |
 
+
 ### Prometheus ServiceMonitor
 
 | Key | Type | Default | Description |
@@ -101,6 +107,7 @@ as an example.
 
 | Key | Type | Default | Description |
 |-----|------|---------|-------------|
+| config | object | `{"global":{"max_connections":3,"max_idle_connections":3,"min_interval":"0s","scrape_error_drop_interval":"0s","scrape_timeout":"10s","scrape_timeout_offset":"500ms"}}` | SQL Exporter configuration, can be a dictionary, or a template yaml string. |
 | config.global.scrape_timeout | string | `"10s"` | Scrape timeout |
 | config.global.scrape_timeout_offset | string | `"500ms"` | Scrape timeout offset. Must be strictly positive. |
 | config.global.scrape_error_drop_interval | string | `"0s"` | Interval between dropping scrape_errors_total metric: by default the metric is persistent. |

helm/templates/NOTES.txt

@@ -1,7 +1,8 @@
+{{- $conf := include "sql_exporter.config.yaml" . | fromYaml -}}
 ------------------------------
 Hello there! 
 
-{{- if and (not .Values.config.target ) (not .Values.config.jobs)}}
+{{- if and (not $conf.target ) (not $conf.jobs)}}
 ------------------------------
 
 It seems like you haven't configured the target, please check the example here:
@@ -14,7 +15,7 @@ In case you need to have multiple targets, you can confiure jobs instead, have a
 
 {{- end}}
 
-{{- if and (not .Values.config.collectors) (not .Values.config.collectorFiles)}}
+{{- if and (not $conf.collectors) (not $conf.collectorFiles)}}
 
 ------------------------------
 You need to configure either collectors or collectorFiles (or both), please have a look at the example here:

helm/templates/_helpers.tpl

@@ -77,3 +77,17 @@ Create the name of the service account to use
 {{- false | quote -}}
 {{- end -}}
 {{- end -}}
+
+{{- define "sql_exporter.config.yaml" -}}
+{{- $conf := "" -}}
+{{- if typeIsLike "string" .Values.config -}}
+{{- $conf = (tpl .Values.config .) | fromYaml -}}
+{{- else -}}
+{{- $conf = .Values.config -}}
+{{- end -}}
+{{- /*
+Do the wired "fromYaml | toYaml" to reformat the config.
+Reformat '100s' to 100s for example.
+*/ -}}
+{{- tpl ($conf | toYaml ) . | fromYaml | toYaml -}}
+{{- end -}}

helm/templates/configmap.collectors.yaml

@@ -8,6 +8,13 @@ metadata:
 data:
   {{- range $k, $v := .Values.collectorFiles }}
   {{ $k }}: |-
-    {{- toYaml $v | nindent 4}}
+    {{- if typeIsLike "string" $v -}}
+    {{- $v = (tpl $v $ | fromYaml) -}}
+    {{- end -}}
+    {{- /*
+        Do the wired "fromYaml | toYaml" to reformat the config.
+        Reformat '100s' to 100s for example.
+    */ -}}
+    {{- tpl (toYaml $v) $ | fromYaml | toYaml | nindent 4}}
   {{- end}}
 {{- end }}

helm/templates/secret.configuration.yaml

@@ -11,5 +11,5 @@ metadata:
 type: Opaque
 stringData:
   sql_exporter.yml: |-
-    {{- toYaml .Values.config | nindent 4 }} 
+    {{- include "sql_exporter.config.yaml" . | nindent 4 }} 
 {{- end }}

helm/values.yaml

@@ -147,6 +147,7 @@ logLevel: debug
 logFormat: logfmt
 # -- Enable reload collector data handler (endpoint /reload)
 reloadEnabled: false
+# -- SQL Exporter configuration, can be a dictionary, or a template yaml string.
 config:
   global:
     # -- Scrape timeout
@@ -192,6 +193,7 @@ config:
 #    - "*.collector.yml"
 # ---------------------------------------------------------------------
 # -- Collector Files
+# (can be dictionaries or yaml string templates)
 # ---------------------------------------------------------------------
 # -- Collector files are mounted to /etc/sql_exporter/collectors dir
 # ---------------------------------------------------------------------