Compare major version number numerically

# Changes

This makes a numerical comparison for the major version number when
launching redis in cluster mode.

This is to make sure that we don't end up in the first block after the
if statement when running Redis newer than v7, as v8 is now out.

Author: andreaswachs

entrypoint.sh

@@ -68,7 +68,9 @@ tls_setup() {
                 echo tls-cluster yes
             } >> /etc/redis/redis.conf
 
-            if [[ "${REDIS_MAJOR_VERSION}" == "v7" ]]; then
+            # Extract numeric version by removing 'v' prefix
+            VERSION_NUMBER="${REDIS_MAJOR_VERSION#v}"
+            if [[ "${VERSION_NUMBER}" -ge 7 ]]; then
                 {
                     echo cluster-preferred-endpoint-type hostname
                 } >> /etc/redis/redis.conf
@@ -142,11 +144,16 @@ start_redis() {
         else
             CLUSTER_ANNOUNCE_IP="${POD_IP}"
         fi
-        
-        if [[ "${REDIS_MAJOR_VERSION}" != "v7" ]]; then
+
+        # Extract numeric version by removing 'v' prefix
+        VERSION_NUMBER="${REDIS_MAJOR_VERSION#v}"
+
+        if [[ "${VERSION_NUMBER}" -lt 7 ]]; then
+          # IP-only mode for Redis v6 and older
           exec redis-server /etc/redis/redis.conf \
           --cluster-announce-ip "${CLUSTER_ANNOUNCE_IP}"
         else
+          # Hostname mode for Redis v7 and newer
           {
             echo cluster-announce-ip "${CLUSTER_ANNOUNCE_IP}"
             echo cluster-announce-hostname "${POD_HOSTNAME}"