[ADD] initContainers curl method

Chart.yaml

@@ -3,7 +3,7 @@ apiVersion: v2
 name: plausible-analytics
 description: A Helm Chart for Plausible Analytics - Simple, open-source, lightweight (< 1 KB) and privacy-friendly web analytics alternative to Google Analytics.
 type: application
-version: 0.2.0
+version: 0.2.1
 appVersion: 2.0.0
 keywords:
   - web analytics

templates/configmap.yaml

@@ -37,3 +37,19 @@ data:
       sleep 2
     done
     echo "ClickHouse is ready."
+  wait-for-clickhouse-with-curl.sh: |
+    #!/bin/sh
+    url="$CLICKHOUSE_DATABASE_URL"
+
+    info=$(echo $url | awk '{ gsub(/https?:\/\//, "", $0); print }')
+    host=$(echo $info | awk -F[/:@] '{print $3}')
+
+    until curl \
+      --fail \
+      --silent \
+      --connect-timeout 5 \
+      --output /dev/null "$host"; do
+      echo "Waiting for ClickHouse to be ready..."
+      sleep 2
+    done
+    echo "ClickHouse is ready."

templates/deployment.yaml

@@ -28,7 +28,7 @@ spec:
       serviceAccountName: {{ include "plausible-analytics.serviceAccountName" . }}
       securityContext:
         {{- toYaml .Values.podSecurityContext | nindent 8 }}
-      {{- if .Values.initContainers }}
+      {{- if .Values.initContainers.enabled }}
       volumes:
         - name: scripts-volume
           configMap:
@@ -46,6 +46,7 @@ spec:
           volumeMounts:
             - name: scripts-volume
               mountPath: /scripts
+        {{- if not .Values.initContainers.curl.enabled }}
         - name: wait-for-clickhouse
           image: bitnami/clickhouse:23.3.9
           command: ['sh', '/scripts/wait-for-clickhouse.sh']
@@ -55,6 +56,18 @@ spec:
                 secretKeyRef:
                   key: CLICKHOUSE_DATABASE_URL
                   name: {{ include "plausible-analytics.secretName" . }}
+        {{- end }}
+        {{- if .Values.initContainers.curl.enabled }}
+        - name: wait-for-clickhouse
+          image: curlimages/curl:8.2.1
+          command: ['sh', '/scripts/wait-for-clickhouse-with-curl.sh']
+          env:
+            - name: CLICKHOUSE_DATABASE_URL
+              valueFrom:
+                secretKeyRef:
+                  key: CLICKHOUSE_DATABASE_URL
+                  name: {{ include "plausible-analytics.secretName" . }}
+        {{- end }}
           volumeMounts:
             - name: scripts-volume
               mountPath: /scripts

values.yaml

@@ -26,7 +26,10 @@ clickhouseFlushIntervalMS: ""
 clickhouseMaxBufferSize: ""
 
 ### Check that postgres and clickhouse are accesible before starting plausible
-initContainers: true
+initContainers: 
+  enabled: true
+  curl: 
+    enabled: true  # use curl method to check if clickhouse is ready. (When port 9000 is not accessible)
 
 ### Specifies if the helm chart should create a secret file or use an existingSecret
 secret: