Questions tagged [redis-sentinel]

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Creating email alerts for kibana filters via sentil

I have a elk stack that works properly and can be monitored via the kibana dashboard. But as an improvement to the whole setup I have being researching for a reporting tool to setup with kibana. My ...
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120 views

HAProxy - Server goes UP without tcp-check if it resolves again

I have a problem with a haproxy instance (1.9.4) in front of a redis cluster (3 nodes), all inside k8s. I configured haproxy for a tcp-check like this: backend bk_redis option tcp-check tcp-...
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1answer
795 views

Redis sentinel: force switch to another master

Context: I have 3 redis nodes, and 3 sentinels. The failover works properly. When I'm taking the master down, another master is elected. Need: I need a way to test the behavior, to make sure ...
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1answer
331 views

redis-sentinel Docker container can't resolve master instance hostname

I'm trying to set up redis-sentinel from bitnami and I'm getting the following error: redis-sentinel_1 | nami ERROR Unable to start com.bitnami.redis-sentinel: redis-sentinel_1 | *** FATAL ...
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1answer
62 views

Redis taking too much memory

I setup a Redis (version 4.0.6) sentinel cluster in two centos 6 VMs. Both master and slave Redis server has maxmemory set to 10GB and maxmemory_policy as volatile-lru. The problem is, both servers ...
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1answer
303 views

Redis Sentinel not respecting announce-ip option

I am attempting to create a redis-sentinel cluster using docker-compose on my system and have it visible to the host machine (this is to try and replicate an application that is going to use redis-...
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1answer
1k views

Redis Sentinel Systemd services failing to start on Ubuntu 16.04 and CentOS 7

Having trouble getting my Redis sentinel systemd services to start. I can run sentinels manually with success -- e.g.: root@poolwc:/etc/redis# redis-sentinel ./sentinel.conf --sentinel Three redis ...
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1answer
854 views

Redis Client not connecting to Redis server via HAProxy

I'm facing an issue while connecting to Redis server via HAProxy using Jedis as a redis client. Everything works fine when Redis server is directly connected to but, the same is not working via ...
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1answer
2k views

Installer for Redis Sentinel on Ubuntu 16.04 LTS

I've installed Redis server v=4.0.6 on Ubuntu 16.04 LTS from Chris Lea's PPA. It works great and I set up 2 Slaves. All is good. -- Now I want to install and configure Redis Sentinel, but I can't ...
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1answer
726 views

HAProxy for Redis Sentinel: want BACKUP, not DOWN

I configured an HAProxy service for my Redis Cluster installation (3 nodes with Redis Sentinel managing the master delegation) and it works good: clients are redirected only to the master node and ...
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0answers
484 views

Redis - Manual failover works but Automatic doesnt

I have a node Redis cluser with 1 master and 2 slaves. Sentinel is running on all of them. master 172.29.245.6 slave1 172.29.240.163 slave2 172.29.225.104 With my master up, this is the status of my ...
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1answer
112 views

How to find limits of clustered Tomcat with Session Replication

I am working on a Tomcat cluster experimentally because of it may be need for us production environments. It must be scaleable, high available and support as much as multi concurrent users. Because of ...
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1answer
19k views

How to turn off 'protected-mode' in Redis?

I'd like to disable protected-mode on my production Redis. Regarding to the following error I got from my other Redis-Sentinel instance I could disable it live by connecting to Redis from the master ...
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1answer
684 views

redis sentinels in AWS and static IPs

I want to set up a 3-instance sentinel cluster in AWS and then have a master and standby redis instance controlled by the sentinel cluster. The question is how to deal with DHCP in an AWS VPC. Since ...
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0answers
212 views

HAProxy health check consecutive counts not resetting

We have two Redis servers behind an HAProxy server. One server is the master, which is up, and the other is the slave, which is down. If the master goes down, the sentinels elect the other server to ...
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2answers
2k views

Redis: failing failover - sentinels can't elect new master node

I've set up four server and sentinel instances on four different virtual machines in a simple master-slave setup. The key replication works fine, and all redis nodes recognized each other (I'm ...
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1answer
724 views

Cannot set password for redis sentinel 3.2

I tried to set up redis sentinel to make it has high availability and support fail over. I begin by setup the redis replication (1 master and 2 slaves in 3 ec2-instances) And after that, i install ...
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0answers
720 views

Redis master-slave “connection lost” error

I have two docker machines: $ docker-machine ls NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS redis-master * virtualbox Running tcp:/...
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0answers
425 views

Redis Sentinel master not downgraded to slave immediately

I have an architecture with three Redis instances (one master and two slaves) and three Sentinel instances. In front of it there is a HaProxy. All works well until the master Redis instance goes down. ...
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3answers
2k views

Redis Sentinel Configuration and Hostnames

I have 2 sentineles and 2 redis servers. I want to configure sentinels using hostnames of redis servers. Currently, I define each hostname in hosts file like this. 10.22.20.156 clsupport1 10.22....
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2answers
2k views

Redis Sentinel does not take action when the master goes down

I am trying to setup a Redis/Sentinel setup across 3 nodes, each of them running one redis instance and a sentinel instance. However, when the master machine goes down, the remaining sentinels just ...
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2answers
736 views

Static master in Redis replication

I'm running replicated Redis that includes a master and just one slave. My goal is to implement a replication (using Redis sentinels) in which the slave becomes master when the master goes down, but ...
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1answer
6k views

Redis sentinel + HAProxy failover

I am looking to implement a HA redis implementation using Master-Slave redis servers. The web servers will connect to these through an HAProxy instance installed on each box. The situation is easy ...