From 5b9ee4b7a32364f2a479ae7e93689ab421a0e215 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A1n=20Ko=C5=A1=C4=8Do?= <3k.stanley@gmail.com>
Date: Fri, 29 Apr 2016 15:14:39 +0200
Subject: [PATCH] Additional configuration of sentinel

---
 README.md            | 15 ++++++++++++++-
 docker-entrypoint.sh | 23 +++++++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 6f45698..5372363 100644
--- a/README.md
+++ b/README.md
@@ -36,4 +36,17 @@ Default value is `2`.
 In case of mapping, configure IP address of sentinel server. Read more in [documentation](Sentinel, Docker, NAT, and possible issues).
 
 ###`ANNOUNCE_PORT`
-In case of mapping, configure mapped port of sentinel server. Read more in [documentation](Sentinel, Docker, NAT, and possible issues).
\ No newline at end of file
+In case of mapping, configure mapped port of sentinel server. Read more in [documentation](Sentinel, Docker, NAT, and possible issues).
+
+###`DOWN_AFTER`
+Time in milliseconds an instance should not be reachable for a Sentinel starting to think it is down. Default value `1500`.
+
+###`FAILOVER_TIMEOUT`
+Wait time before failover retry of the same master. Default value `30000`.
+
+###`PARALLEL_SYNCS`
+Sets the number of slaves that can be reconfigured to use the new master after a failover at the same time. Default value `1`.
+
+###`SLAVES`
+Manually configure all the slaves of monitored master. Expected format: `ip_address:host;ip_address:host`.
+
diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index 8d6afe4..0ad10b8 100644
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -13,6 +13,15 @@ GROUP_NAME=$GROUP_NAME
 MASTER_PORT=$MASTER_PORT
 : ${MASTER_PORT:=6379}
 
+DOWN_AFTER=$DOWN_AFTER
+: ${DOWN_AFTER:=1500}
+
+FAILOVER_TIMEOUT=$FAILOVER_TIMEOUT
+: ${FAILOVER_TIMEOUT:=30000}
+
+PARALLEL_SYNCS=$PARALLEL_SYNCS
+: ${PARALLEL_SYNCS:=1}
+
 echo "port 26379" >> $SENTINEL_CONFIGURATION_FILE
 
 if [ "$ANNOUNCE_IP" ]; then
@@ -24,5 +33,19 @@ if [ "$ANNOUNCE_PORT" ]; then
 fi
 
 echo "sentinel monitor $GROUP_NAME $MASTER_IP $MASTER_PORT $QUORUM" >> $SENTINEL_CONFIGURATION_FILE
+echo "sentinel down-after-milliseconds $GROUP_NAME $DOWN_AFTER" >> $SENTINEL_CONFIGURATION_FILE
+echo "sentinel failover-timeout $GROUP_NAME $FAILOVER_TIMEOUT" >> $SENTINEL_CONFIGURATION_FILE
+echo "sentinel parallel-syncs $GROUP_NAME $PARALLEL_SYNCS" >> $SENTINEL_CONFIGURATION_FILE
+
+if [ "$SLAVES" ]; then
+    for SLAVE in $(echo $SLAVES | tr ";" "\n")
+    do
+        if [ "$SLAVE" ]; then
+            HOST=${SLAVE%:*}
+            PORT=${SLAVE#*:}
+            echo "sentinel known-slave $GROUP_NAME $HOST $PORT" >> $SENTINEL_CONFIGURATION_FILE
+        fi
+    done
+fi
 
 redis-server $SENTINEL_CONFIGURATION_FILE --sentinel
\ No newline at end of file