Image build for the Sentinel Support

Dockerfile.sentinel

+FROM alpine:3.15 as builder
+
+LABEL VERSION=1.0 \
+      ARCH=AMD64 \
+      DESCRIPTION="A production grade performance tuned redis docker image created by Opstree Solutions"
+
+ARG REDIS_DOWNLOAD_URL="http://download.redis.io/"
+
+ARG REDIS_VERSION="stable"
+
+RUN apk add --no-cache su-exec tzdata make curl build-base linux-headers bash openssl-dev
+
+RUN curl -fL -Lo /tmp/redis-${REDIS_VERSION}.tar.gz ${REDIS_DOWNLOAD_URL}/redis-${REDIS_VERSION}.tar.gz && \
+    cd /tmp && \
+    tar xvzf redis-${REDIS_VERSION}.tar.gz && \
+    cd redis-${REDIS_VERSION} && \
+    make && \
+    make install BUILD_TLS=yes
+
+FROM alpine:3.15
+
+LABEL VERSION=1.0 \
+      ARCH=AMD64 \
+      DESCRIPTION="A production grade performance tuned redis docker image created by Opstree Solutions"
+
+
+COPY --from=builder /usr/local/bin/redis-cli /usr/local/bin/redis-cli
+COPY --from=builder /usr/local/bin/redis-sentinel /usr/local/bin/redis-sentinel
+
+RUN addgroup -S -g 1000 redis && adduser -S -G redis -u 1000 redis && \
+    apk add --no-cache bash
+
+COPY sentinel.conf /etc/redis/sentinel.conf
+
+COPY entrypoint-sentinel.sh /usr/bin/entrypoint-sentinel.sh
+
+COPY healthcheck.sh /usr/bin/healthcheck.sh
+
+RUN chown -R redis:redis /etc/redis
+
+VOLUME ["/sentinel-data"]
+
+WORKDIR /data
+
+EXPOSE 26379
+
+USER 1000
+
+ENTRYPOINT ["/usr/bin/entrypoint-sentinel.sh"]

entrypoint-sentinel.sh

+#!/bin/bash
+
+EXTERNAL_CONFIG_FILE=${EXTERNAL_CONFIG_FILE:-"/etc/redis/external.conf.d/redis-sentinel-additional.conf"}
+
+external_config() {
+  echo "include ${EXTERNAL_CONFIG_FILE}" >> /etc/redis/sentinel.conf
+}
+
+start_sentinel() {
+
+  echo "Starting redis sentinel service in standalone mode....."
+    redis-sentinel /etc/redis/sentinel.conf
+  
+}
+
+main_function() {
+
+  if [[ -f "${EXTERNAL_CONFIG_FILE}" ]]; then
+    external_config
+  fi
+  start_sentinel
+}
+
+main_function
\ No newline at end of file

sentine.conf

+protected-mode no
+port 26379
+daemonize no
+pidfile /var/run/redis-sentinel.pid
+logfile ""
+dir /tmp
+
+acllog-max-len 128
+
+# sentinel monitor mymaster 127.0.0.1 6379 2
+# sentinel down-after-milliseconds mymaster 30000
+# sentinel parallel-syncs mymaster 1
+# sentinel failover-timeout mymaster 180000
+sentinel deny-scripts-reconfig yes
+SENTINEL resolve-hostnames no
+SENTINEL announce-hostnames no
+# SENTINEL master-reboot-down-after-period mymaster 0