Initial commit.

Manager for Redis Cluster created from scratch. Used in a CAC40 company to perform seamless failover with only 2 datacenters.

.gitignore

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+old/

prepare_reboot_redis.sh

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+#!/bin/bash
+
+# Paramètres pouvant être modifiés :
+# MANAGERS : Liste des managers redis.
+# MANAGER_PORT : Port du manager.
+# DURATION : Temps approximatif du reboot.
+# 
+# Ensuite dans le script il y a un sleep 30 et un count qui va jusqu’à 10, à modifier si on a besoin de plus de temps pour que le cluster soit modifié.
+# Les logs (sur RHEL6 et RHEL7) sont envoyés dans /var/log/cron si le lancement de ce script est ajouté en crontab.
+
+############
+MANAGERS="10.166.119.48 10.166.119.47"
+MANAGER_PORT=45000
+############
+DURATION=300
+WAIT=1
+
+SERVER_IP=$(ip route get 10 | head -n 1 | awk '{print $NF}')
+
+echo "Preparing redis for reboot."
+
+for MANAGER in ${MANAGERS}; do
+    OUTPUT_ROLE=$(timeout 1 curl -s ${MANAGER}:${MANAGER_PORT}/manager_status 2>&1)
+    echo ${OUTPUT_ROLE} | grep -q 'active'
+    if [ $? == 0 ]; then
+        ACTIVE_MANAGER=${MANAGER}
+        break
+    else
+        continue
+    fi
+done
+
+if [ -z ${ACTIVE_MANAGER} ]; then
+    echo "No active manager found."
+    echo "Managers tried : ${MANAGERS}"
+    exit 2
+else
+    echo "Active manager is : ${ACTIVE_MANAGER}"
+fi
+
+COUNT=0
+while [ $WAIT == 1 ]; do
+    echo "Asking ${MANAGER}..."
+    OUTPUT=$(timeout 1 curl -s ${MANAGER}:${MANAGER_PORT}/prepare_for_reboot/${SERVER_IP}\&duration=${DURATION} 2>&1)
+    echo "$OUTPUT" | grep -q 'DONE' 
+    if [ $? == 0 ]; then
+        WAIT=0
+    else
+        COUNT=$(($COUNT+1))
+        echo $COUNT
+        sleep 30
+    fi
+    if [ $COUNT == 10 ]; then
+        echo "Error, manager taking too long to modify the cluster"
+        exit 2
+    fi
+done
+
+echo "Ready for reboot"