From 9c16c9d99b9d7c0dae25bfb0cb59eea994fd85b7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beatrice=20Dellac=C3=A0?= <hello@beatrice.wtf>
Date: Sun, 30 Mar 2025 14:28:40 +0200
Subject: [PATCH] fix read only fs?

---
 deploy/redis/redis-sentinel-deploy.yaml | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/deploy/redis/redis-sentinel-deploy.yaml b/deploy/redis/redis-sentinel-deploy.yaml
index d034ddc..3f6578f 100644
--- a/deploy/redis/redis-sentinel-deploy.yaml
+++ b/deploy/redis/redis-sentinel-deploy.yaml
@@ -15,6 +15,16 @@ spec:
       labels:
         app: redis-sentinel
     spec:
+      # Init container to copy the sentinel.conf from the ConfigMap to a writable emptyDir volume.
+      initContainers:
+      - name: copy-sentinel-config
+        image: busybox
+        command: ['sh', '-c', 'cp /config/sentinel.conf /writable/']
+        volumeMounts:
+        - name: sentinel-config-readonly
+          mountPath: /config
+        - name: sentinel-config
+          mountPath: /writable
       containers:
       - name: redis-sentinel
         image: redis:6.2-alpine
@@ -26,8 +36,12 @@ spec:
           - "/etc/redis/sentinel.conf"
         volumeMounts:
         - name: sentinel-config
-          mountPath: /etc/redis
+          mountPath: /etc/redis  # this volume is now writable
       volumes:
-      - name: sentinel-config
+      # Mount the ConfigMap as a read-only volume for the init container
+      - name: sentinel-config-readonly
         configMap:
           name: redis-sentinel-config
+      # EmptyDir volume to hold the writable config file
+      - name: sentinel-config
+        emptyDir: {}