redis-sentinel

Now that Redis Cluster comes with sharding, replication and automatic failover, do i still need to use Sentinel for failover handling?

由 ε祈祈猫儿з 提交于 2020-01-17 06:40:11
问题 Now that Redis Cluster comes with sharding, replication and automatic failover, do i still need to use Sentinel for failover handling ? 回答1: No. Sentinel is for managing the availability and providing service discovery when using Redis in single instance mode (single-master/one-or-more-slaves). When using Redis in cluster mode, Sentinel isn't needed. 来源： https://stackoverflow.com/questions/44361898/now-that-redis-cluster-comes-with-sharding-replication-and-automatic-failover

Using jedis how to write to a specific slot/node in redis cluster

由 此生再无相见时 提交于 2019-12-22 18:13:34
问题 I'm trying to improve the performance of writing data to redis cluster. We are planning to move from redi-sentinel to cluster mode for scalability. But, the performance of write operations is very less compared to redis-sentinel. We leveraged pipeline in redis-sentinel but cluster mode doesn't support pipeline. So, I was thinking to group all the keys that go to a same node and send the batch to that specific node using pipeline. So, I'm wondering how to know/compute (before writing to

Redis replication config

由 廉价感情. 提交于 2019-12-19 11:23:38
问题 I have a redis master setup with 2 slaves and a sentinal on each. If the master goes down for say 2 seconds (+sdown) and comes back up (-sdown), it reads the last snapshot, and the slaves resync with the master. The problem with this is that there may have been many writes between the last save and the +sdown. It seems like if the master goes from +sdown to -sdown and never +odown (where a failover is initiated), it should be able to sync FROM a slave. My reasoning is that the replication

redis 哨兵模式配置与spring集成

由 一世执手 提交于 2019-12-16 21:51:26
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 最低安装 redis 2.8以上版本 以下流程 为redis3.2.11版本上建立 1、编译redis源码 make PREFIX=/usr/local/redis install 如果提示错误 /bin/sh: cc: command not found 则执行 sudo yum -y install gcc gcc-c++ libstdc++-devel make MALLOC=libc mkdir conf mkdir data mkdir log 2、将redis 源码下的 redis.conf和sentinel.conf 复制到 redis/conf/ 下，修改 redis.conf bind 172.16.5.58 protected-mode no tcp-backlog 511 timeout 0 tcp-keepalive 300 daemonize yes supervised no pidfile "/var/run/redis_16382.pid" loglevel notice logfile "/usr/local/redis-16382/log/redis-16382.log" databases 16 save 900 1 save 300 10 save 60 10000

redis sentinel 安装

由 时光总嘲笑我的痴心妄想 提交于 2019-12-16 21:09:13
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 启动方式 redis-server redis-6381.conf /rdb/6380/redis-6381.conf port 6380 bind 127.0.0.1 requirepass "myredis" daemonize yes logfile "6381.log" dbfilename "dump-6381.rdb" dir "/Users/huitingting/notes/rdb/6380" #如若master设置了认证密码，那么所有redis数据节点都配置上masterauth属性 #masterauth "myredis" slaveof 127.0.0.1 6379 ~/notes/rdb/rdb_sentinel/26379/sentinel-26379.conf #filename: sentinel-26379.conf port 26379 daemonize yes logfile "26379.log" dir "/Users/huitingting/notes/rdb/rdb_sentinel/26379" #redis数据master节点设置了认证，则需要如下配置 # sentinel myid

redis主从同步配置和哨兵机制监控master主从切换配置

由 人走茶凉 提交于 2019-12-12 13:46:49
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 搭建好redis单机后，开始研究redis集群配置 两台VM虚拟机，都安装了redis程序，一台作为master 一台作为slave 首先配置redis主从配置 配置在redis.conf文件中 主机上需要设置masterauth(光主从同步不需要配置这个，但是后续配置哨兵机制的时候需要配置这个属性) 从机上需要配置slaveof 主机IP 主机端口，同样也许配置masterauth，密码和主机一样 启动主机，启动从机 在主机上set key value后 在从机上get key 能正常得到主机设置的值 但是要实现主从容错自动切换，就需要配置redis哨兵， redis-sentinel 是一个守护进程，作用有，监控，管理主从机，通知，主从切换功能 首先设置主机sentinel.conf sentinel monitor mymaster 127.0.0.1 6379 1 这句话的意思是监控集群名为mymaster的主机IP，端口，最后一个数字表示，当有几台哨兵监控到主机出错后执行主从切换 sentinel auth-pass mymaster 密码 这个密码需要和redis.conf中的masterauth一致 sentinel down-after-milliseconds mymaster 15000

Is master always redis instance with smallest priority?

由 半腔热情 提交于 2019-12-10 23:14:52
问题 I am running master-slave redis with sentinel, when I kill my master, the lowest priority slave becomes the new master. But when I start my old master again, which has an even lower priority, it does not become the master. Is this behavior intended and somewhere documented? I don't seem to find anything in the redis sentinel documentation. 回答1: In regards to "failover behavior. It's clearly states that the lowest priority slave is preferred (unless it's zero) - see the docs ("Slaves priority"

Redis sentinels in same servers as master/slave?

由 拥有回忆 提交于 2019-12-09 04:59:55
问题 I've been doing some reading on how to use Redis Sentinel, and I know it's possible to have 2 or more sentinels, and load balance between them when calling from the client side. Is it good practice to have these 2 sentinels in the same server as my master + slave? In other words, have 1 sentinel in the same physical server as master, and another in same physical server as slave? It seems to me if the master server dies, the sentinel in the slave will simply promote the slave to a master. if

Correct @EnableRedisHttpSession configuration with Redis Sentinel

由 白昼怎懂夜的黑 提交于 2019-12-07 21:00:33
问题 I have a Spring Cloud based application with multiple backend Spring-Boot servers. The servers are all sharing their session with a Redis server via @EnableRedisHttpSession. I'm trying to configure the application with master-slave configuration and Redis Sentinel. My setup is 1 master, two slaves, and 3 sentinels. I keep getting issues with the environment. At first, I was getting an error saying that my slave it READONLY. So I had to set all slaves to READWRITE. Then, I still got this error

Docker学习（五）—— 单机Redis安装与集群安装和分布式安装

由 情到浓时终转凉″ 提交于 2019-12-07 17:14:04
一、单机Redis安装与使用 [root @localhost ~]# systemctl start docker.service //启动服务 1、命令安装： 1)[root @localhost ~]# docker search redis 2)[root @localhost ~]# docker pull redis:4.0.11 3)[root @localhost ~]# docker images redis 2、使用Dockerfile安装 注：官方的 redis 镜像本身不是基于 CentOS，所以不会有 yum 安裝在上面，就算你的 docker engine Host 是在 CentOS 上，你在 docker container 里面执行也不能执行 yum，这是 docker 的基本概念。 1）创建Dockerfile（从官网抄用），参考官网的 Dockerfile 文档，https://hub.docker.com/_/redis/ 2）[root @localhost ~]# docker build -t redis:4.0.11 . //后面这个"."必须要，表示当前目录 Removing intermediate container 5f07932b9e00 Step 10 : VOLUME /data ---> Running in
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