added master/slave replication support

bitnami/redis/rootfs/bitnami-utils-custom.sh

@@ -7,6 +7,51 @@ set_redis_password() {
   fi
 }
 
+configure_replication() {
+  if [ "$REDIS_REPLICATION_MODE" == "slave" ]; then
+    echo ""
+    echo "==> Setting up Redis slave..."
+
+    echo "==> Trying to fetch Redis replication parameters from the master link..."
+    REDIS_MASTER_HOST=${REDIS_MASTER_HOST:-$MASTER_PORT_6379_TCP_ADDR}
+    REDIS_MASTER_PORT=${REDIS_MASTER_PORT:-$MASTER_PORT_6379_TCP_PORT}
+    REDIS_MASTER_PASSWORD=${REDIS_MASTER_PASSWORD:-$MASTER_ENV_REDIS_PASSWORD}
+
+    if [ ! $REDIS_MASTER_HOST ]; then
+      echo "In order to setup a replication slave you need to provide the REDIS_MASTER_HOST as well"
+      echo ""
+      exit -1
+    fi
+
+    if [ ! $REDIS_MASTER_PORT ]; then
+      echo "REDIS_MASTER_PORT not specified. Defaulting to 6379"
+      echo ""
+      POSTGRESQL_MASTER_PORT=${POSTGRESQL_MASTER_PORT:-6379}
+    fi
+
+    echo "==> Checking if master is ready to accept connection (60s timeout)..."
+    timeout=60
+    while ! redis-cli -h $REDIS_MASTER_HOST -p $REDIS_MASTER_PORT ${REDIS_MASTER_PASSWORD:+-a $REDIS_MASTER_PASSWORD} ping >/dev/null 2>&1
+    do
+      timeout=$(expr $timeout - 1)
+      if [[ $timeout -eq 0 ]]; then
+        echo ""
+        echo "Could not connect to replication master"
+        echo ""
+        exit -1
+      fi
+      sleep 1
+    done
+
+    echo "==> Setting the master configuration..."
+    sed 's|^[#]*[ ]*slaveof .*|slaveof '"$REDIS_MASTER_HOST"' '"$REDIS_MASTER_PORT"'|' -i $BITNAMI_APP_DIR/etc/conf/redis.conf
+    if [ $REDIS_MASTER_PASSWORD ]; then
+      sed 's|^[#]*[ ]*masterauth .*|masterauth '"$REDIS_MASTER_PASSWORD"'|' -i $BITNAMI_APP_DIR/etc/conf/redis.conf
+    fi
+    echo ""
+  fi
+}
+
 print_redis_password() {
   if [ -z $REDIS_PASSWORD ]; then
     echo "**none**"

bitnami/redis/rootfs/etc/cont-init.d/01-bitnami-redis

@@ -12,6 +12,8 @@ else
   print_container_already_initialized $BITNAMI_APP_NAME
 fi
 
+configure_replication
+
 chown -R $BITNAMI_APP_USER:$BITNAMI_APP_USER $BITNAMI_APP_VOL_PREFIX/data/ \
   $BITNAMI_APP_VOL_PREFIX/logs/ \
   $BITNAMI_APP_VOL_PREFIX/conf/ || true