Questions tagged [redis]

Redis is an open source, highly-scalable key-value store, commonly referred to as a "NoSQL database."

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23 views

How to monitor the disk space usage of an AWS elasticache redis cluster?

This is the reason behind this question: I am using a redis cluster on AWS elasticcache as a datastore. I do not enable eviction because I need to keep the data alive inside the redis cluster for as ...
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Why my java application can reach the AWS elasticcache Redis cluster with the lettuce library but not directly with redis-cli?

I have an java app running in an EC2 instance which use lettuce (https://lettuce.io/) to talk to a redis cluster on AWS ElasticCache. I have logged on to the same ec2 instance and tried to use redis-...
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Suspicious ksoftirqd_1 process using high cpu [duplicate]

I run this webserver that serves data to a couple of apps. In the last couple of days I have noticed that some requests take some more time than usual, so I did a top to find out what's running and ...
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Redis refuse to start on non-stardard port through systemd

Redis refuses to start on a port other then 6379 with systemd. I am seeing this error message: Starting Redis persistent key-value database... Started Redis persistent key-value database. redis....
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Slow link between redis master and slave

I have a smallish (~40MB, monitoring data + a lot of processed metrics) master redis database but where most of the keys are updated extremely frequently (longest time between updates would be 60 ...
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redis can not use the max memory setting

# Memory used_memory:142970736 used_memory_human:136.35M used_memory_rss:149966848 used_memory_rss_human:143.02M used_memory_peak:142970736 used_memory_peak_human:136.35M used_memory_peak_perc:100.06% ...
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111 views

copy (partial) redis data from one server to another

I am searching for a solution to copy a specific db from one redis server to another. The two servers are not located in the same site, or have any sort of connection between them- so the data must be ...
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78 views

How to untaint a terraform resource after network issue during application of a terraform plan?

I had applied a terraform to create a redis cluster. Half way through, the application process failed with this error message: Error: Error waiting for elasticache replication group (my-project) to ...
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1answer
33 views

How can I modify an auth_token of a redis cluster if the redis engine version is below 5.0.5?

I am running a redis cluster on AWS with engine version 5.0.3. So when I tried to use this aws command to modify the auth_token aws elasticache modify-replication-group \ --replication-group-id ...
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1answer
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How to find out the endpoint url of a node of a redis cluster via aws cli 'elasticache describe-cache-clusters'?

If I run aws elasticache describe-cache-clusters I will get results like this: { "CacheClusterId": "dev-001", "ClientDownloadLandingPage": "https://console.aws.amazon.com/...
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new email server configured, Postfix, Dovecot, MariaDB, Rspamd and Redis the main components, on Arch, can't send or receive mail

Dovecot reports logins when trying to send (via T'bird). One of the online email testing sites reported: Server 'HELO' line: 220-mail.mydomain.tld ESMTP Postfix so we know the SMTP service is ready, ...
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Random “Connection resets by peer” with redis-benchmark

I've got several linux hosts in office network. When I run Redis server on one of them, redis clients receive random errors "Connection reset by peer". We've noticed these errors with our own ...
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Redis3 - Migration from RDB to AOF

Can I migrate from RDB to AOF without downtime? Docs aren't that clear and I have pretty important data there, so I want to be 100% sure, that I won't break or lose anything during that process.
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How to tell how much memory is available to a single process in Linux?

I have a Linux server dedicated to Redis. Redis is supposed to take up almost all RAM to itself. I am worried that Linux may impose a limit on memory consumption for Redis. The question is this: how ...
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50 views

Fix “Redis is busy running a script” on the server side?

When this question has been asked before (How to fix the "Redis is busy running a script" error), the solution is to make the client retry requests until it succeeds. I was wondering if, ...
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Starting more than one instance of redis with systemd and without template

I am trying to start 2 instances of redis on different ports (6379, 6380), I have followed all the guides, examples of creating systemd units for redis Somehow, the second instance stops after a while ...
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How do I configure nginx to use redis instead of local disk with proxy_cache and proxy_cache_use_stale?

I'd like to set up a reverse proxy to a REST service that uses HTTPS. The proxy needs to store cached responses in redis (not on disk). If the REST service is down or times out, I want the proxy to ...
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81 views

Redis pub/sub - cluster vs multiple single instances

I am new to Redis, so bare with me, if this question is very basic. I have the need for a publish/subscriber pattern. I need it for A) notifications between entities to lower some latency in an ...
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1answer
94 views

Infected server (bitcoin mining malware) [duplicate]

I found some strange process on my centos 8 machine check above photo: when I type cat /etc/passwd I don't see user 990 anywhere also this kinsing process is strange because this is the same process ...
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70 views

How to uninstall redis on Centos 8

How can i fully uninstall redis from my Centos 8 machine ? I have a malware that keeps getting in via redis 41533 redis 20 0 5883224 4.4g 2776 S 1593 13.9 13507:24 kdevtmpfsi
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1answer
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rspamd redis sentinel time out

Since some time we are running rspamd and redis (and sentinel) with a separate DB for most modules. Data seems to be written to the databases but for some reason we get errors like "cannot get masters ...
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210 views

celery + redis + django [Errno 111] Connection refused

I can not run the celery worker + redis + django. If I run this command to check that celery worker is ready to receive tasks: celery -A car_rental worker -l info I got this error: [2020-02-24 00:...
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9 views

Redis: Optimize number of connected clients

I am using a Redis instance as a synchronization mechanism for thousands of client workers (they create a key in Redis representing the lock for that job). My instance currently supports about 50k ...
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30 views

Redis: Is there a tool or command to check the existence of the `dump.rdb` file while being the user `www-data`?

Some context: We use Redis as a cache. Persistence is not needed. When Redis starts up, it will look for its dump.rdb file using the dir and dbfilename setting and load it, even with all persistence ...
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44 views

How to migrate a standalone Redis instance to a Kubernetes Master/Slave replication

I'm migrating an application from a single server to a Kubernetes cluster. I'm no really sure what's the best option to migrate the Redis service, therefore I'd like to get the advice of anyone :) I ...
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1answer
42 views

K8S Redis connection

I've installed Bitnami Helm Chart for HA Redis: https://bitnami.com/stack/redis/helm aleg@Azure:~$ kubectl get pods | grep redis redis-1580896952-master-0 1/1 ...
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3answers
427 views

CPU - 16 threads stuck at 100% [resolved]

I use centos 8, mariadb 10.5, php 7.4 enter image description here As you can see 16 threads are at 100% stucked there this very unsual normally my cpu are at 10-25% as constant. here is a top ...
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70 views

How to ensure the aws-cli to connect to the redis server in a docker container?

When I run a redis-cli, it seems to automatically connect to a local instance of redis server, even though I did not explicitly create one. I am using MacOS at the moment. I first install the redis-...
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110 views

Redis 5.0.7 make test returns errors | Active defrag big keys and Slave should be able to synchronize

I'm trying to install Redis, but when I run make test it returns the following error[s]. [err]: Slave should be able to synchronize with the master in tests/integration/replication-psync.tcl ...
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1answer
257 views

How to fix the “Redis is busy running a script” error

My servers are repeatedly crashing due to receiving the following error from Redis: BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE. However, I can't seem to ...
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1answer
96 views

Laravel View Cache location

Sorry if this seems trivial, but I need to be sure: Where does Laravel 6 store the view cache? On the cache server or in the storage folder? Does it get stored in my redis if I set it as the cache ...
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1answer
209 views

redis instance restore using dump.rdb is not working

I have redis instance with 10 keys in qa env. the instance is configured to use dump.rdb in /tmp directory . I ran "save" command and saw new dump.rdb file that was created . then I created new ...
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2answers
738 views

Where is the Redis module for PHP on CentOS 8 (php-pecl-redis)?

I can't find the package php-pecl-redis on CentOS 8 with EPEL repository enabled. Apparently EPEL no longer provides it. I've only found it on REMI repository, but I would have to replace my entire ...
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1answer
32 views

What is the typical way of setting up the Redis server in a production environment?

Assuming I have my application set up such that I have a NodeJS server running on some remote machine, and I have my database running on another remote machine. Assuming that I want to set up a Redis ...
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176 views

AWS : Redis with Drupal 8

I already setup Redis cache with node type 'cache.t2.medium' on AWS Below configuration I have in Drupal settings.php $settings['redis.connection']['interface'] = 'PhpRedis'; $settings['redis....
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103 views

HAProxy - Run all checks before accepting connections?

I'm using haproxy to provide access to a redis cluster. But i'm experiencing issues when haproxy is starting since all servers are initially up, before the first checks can be run. Is there a way to ...
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1answer
21 views

Having a redis service linked to a specific application deployment revision

Say I have an application that has two deployments: An application deployment, with the actual application itself A Redis deployment, which is used by the application deployment for caching The ...
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1answer
33 views

Jenkins and Gitlab bundled with Redis and/or nginx?

I'm establishing some monitoring on a few servers running jenkins and GitLab. My Monitoring agent auto discovers lots of metrics and identifies processes. On all of my Jenkins and GitLab servers, I ...
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43 views

HA Proxy, route request based on request's body

Question: Can HAProxy look at the body of the incoming request and route based on what it finds there? Explanation: I have one single node which sends requests towards my HAProxy. These requests are ...
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2answers
96 views

why does Redis fail to start wth default config?

I am running Ubuntu 18 (well, really Windows Subsystem for Linux with Ubuntu 18 distro). I have installed redis 4.0.9. If I start it with no config specified, it works out ok: redis-server However,...
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2answers
1k views

How to configure Redis Cluster inside a Kubernetes cluster to be accessible by external applications

I'm having trouble exposing my Redis Cluster on Kubernetes to external applications. Using a Kubernetes load balancer service, I'm able to assign an external IP to Redis which provides initial ...
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32 views

haproxy pods in keep crashloopbackoff

I'm using helm to install a redis-ha in my cluster with command: helm install -f develop-redis-values.yaml stable/redis-ha --namespace=develop -n=develop-redis In develop-redis-values.yaml, i turn ...
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272 views

Redis maxmemory on ElastiCache instance lower than expected

I have an AWS ElastiCache instance hosted on a cache.m5.xlarge instance type, which advertises 12.93gb of ram. from the AWS ElastiCache documentation it says that a cache.m5.xlarge instance should ...
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69 views

Redis server shutdown on EC2: can no longer connect rq workers, and Elastic Beanstalk won't connect

Yesterday I successfully set up a Redis server on AWS EC2, and was able to connect rq workers to it and run a Flask application sending processes to it from my local machine. Today I successfully ...
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1answer
507 views

redis-server service:cannot open PID file var/ru

I am new in server work,i have installed redis on ubuntu 18.04 server,Then i run this command if re`enter dis is active sudo systemctl status redis then it says,redis-server service:cannot open PID ...
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299 views

How to install phpredis-5.0.2 on Elastic Beanstalk with PHP 5.6?

Today we're using this code to install version 4.0.2 but it's not working for us for 5.0.2: # these commands run before the application and web server are # set up and the application version file is ...
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111 views

High availability web application server configuration recommendations & PHP Sessions

I'd like to update an existing server configuration. Currently, the setup looks like this: {Load balancer} | -----------|------------ | | | {Web 1} {...
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2answers
109 views

Accessing Redis in a peered VNet

I have an IaaS server in one Azure VNet and a premium Redis cache in another peered VNet. There are no NSGs. I can't access Redis using redis-cli. Is there some restriction to accessing Redis from a ...
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1answer
83 views

How to uninstall completely from centos?

I have installed redis by following instructions. $ wget http://download.redis.io/releases/redis-5.0.5.tar.gz $ tar xzf redis-5.0.5.tar.gz $ cd redis-5.0.5 $ make but I don't know how to uninstall ...
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13 views

where to detect failed redis auth attempts and identify requesting domain/virtual host

I have an apache server having multiple virtual hosts. Just for testing I installed redis and configured to run two different redis instances on two different ports with password. Now let say one of ...

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