快速测试 3节点的redis sentinel集群宕机2个节点以后是否仍能正常使用

本文主要是介绍快速测试 3节点的redis sentinel集群宕机2个节点以后是否仍能正常使用,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!

有同事问我,三个redis sentinel节点,宕机两个节点以后,是否还能够正常的通过redis sentinel正常访问redis的数据。我想了想,理论上是可以的,但是我没试过,今天有时间就测试了一下。搭建环境和测试代码的郭晨不够一波三折,以下是配置信息。虚拟机使用的是CENTOS7 ,docker是现成的,redis镜像的版本redis_version:7.0.11 , python是python3

使用docker compose 快速启动 redis节点和sentinel集群,这样会比较快。

docker-compose.yml

version: '3.0'
services:master:image: rediscontainer_name: redis-masterports:- 6379:6379# 这个模式不要用 host,会有问题,用bridgenetwork_mode: bridgecommand: redis-server /usr/local/etc/redis/redis.confvolumes:- ./redis1.conf:/usr/local/etc/redis/redis.confslave1:image: rediscontainer_name: redis-slave-1ports:- 6380:6380network_mode: bridgecommand: redis-server /usr/local/etc/redis/redis.conf --slaveof 10.4.7.124 6379volumes:- ./redis2.conf:/usr/local/etc/redis/redis.confslave2:image: rediscontainer_name: redis-slave-2ports:- 6381:6381network_mode: bridgecommand: redis-server /usr/local/etc/redis/redis.conf --slaveof 10.4.7.124 6379volumes:- ./redis3.conf:/usr/local/etc/redis/redis.confsentinel1:image: rediscontainer_name: redis-sentinel-1ports:- 26379:26379network_mode: bridgecommand: redis-sentinel /usr/local/etc/redis/sentinel.confvolumes:- ./sentinel1.conf:/usr/local/etc/redis/sentinel.confsentinel2:image: rediscontainer_name: redis-sentinel-2ports:- 26380:26380network_mode: bridgecommand: redis-sentinel /usr/local/etc/redis/sentinel.confvolumes:- ./sentinel2.conf:/usr/local/etc/redis/sentinel.confsentinel3:image: rediscontainer_name: redis-sentinel-3ports:- 26381:26381network_mode: bridgecommand: redis-sentinel /usr/local/etc/redis/sentinel.confvolumes:- ./sentinel3.conf:/usr/local/etc/redis/sentinel.conf

redis1.conf

bind 0.0.0.0
protected-mode no
port 6379
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /var/run/redis_6379.pid
loglevel notice
logfile ""
databases 16
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir ./
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes

redis2.conf

bind 0.0.0.0
# 这个模式要no,否则不好连接测试
protected-mode no
port 6380
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /var/run/redis_6380.pid
loglevel notice
logfile ""
databases 16
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir ./
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes

redis3.conf

bind 0.0.0.0
protected-mode no
port 6381
tcp-backlog 511
timeout 0
tcp-keepalive 300
daemonize no
supervised no
pidfile /var/run/redis_6381.pid
loglevel notice
logfile ""
databases 16
always-show-logo yes
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump.rdb
dir ./
replica-serve-stale-data yes
replica-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
repl-disable-tcp-nodelay no
replica-priority 100
lazyfree-lazy-eviction no
lazyfree-lazy-expire no
lazyfree-lazy-server-del no
replica-lazy-flush no
appendonly no
appendfilename "appendonly.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb
aof-load-truncated yes
aof-use-rdb-preamble yes
lua-time-limit 5000
slowlog-log-slower-than 10000
slowlog-max-len 128
latency-monitor-threshold 0
notify-keyspace-events ""
hash-max-ziplist-entries 512
hash-max-ziplist-value 64
list-max-ziplist-size -2
list-compress-depth 0
set-max-intset-entries 512
zset-max-ziplist-entries 128
zset-max-ziplist-value 64
hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
activerehashing yes
client-output-buffer-limit normal 0 0 0
client-output-buffer-limit replica 256mb 64mb 60
client-output-buffer-limit pubsub 32mb 8mb 60
hz 10
dynamic-hz yes
aof-rewrite-incremental-fsync yes
rdb-save-incremental-fsync yes

sentinel1.conf

port 26379
sentinel monitor mymaster 10.4.7.124 6379 2
sentinel down-after-milliseconds mymaster 10000
sentinel failover-timeout mymaster 180000
sentinel parallel-syncs mymaster 1

sentinel2.conf

port 26380                                                                                                                                                                                                                 
sentinel monitor mymaster 10.4.7.124 6379 2                                                                                                                                                                                
sentinel down-after-milliseconds mymaster 10000                                                                                                                                                                            
sentinel failover-timeout mymaster 180000                                                                                                                                                                                  
sentinel parallel-syncs mymaster 1  

sentinel3.conf

port 26381                                                                                                                                                                                                                 
sentinel monitor mymaster 10.4.7.124 6379 2                                                                                                                                                                                
sentinel down-after-milliseconds mymaster 10000                                                                                                                                                                            
sentinel failover-timeout mymaster 180000                                                                                                                                                                                  
sentinel parallel-syncs mymaster 1      

启动所有服务

docker-compose up -d
docker compose up -d
[root@docker_124 sentinel]# docker compose up -d 
[+] Running 6/6✔ Container redis-slave-2     Started                                                                                                                                                                                0.1s ✔ Container redis-sentinel-1  Started                                                                                                                                                                                0.1s ✔ Container redis-sentinel-2  Started                                                                                                                                                                                0.1s ✔ Container redis-sentinel-3  Started                                                                                                                                                                                0.1s ✔ Container redis-master      Started                                                                                                                                                                                0.1s ✔ Container redis-slave-1     Started    

停止所有服务

docker-compose down
[root@docker_124 sentinel]# docker compose up -d 
[+] Running 6/6✔ Container redis-slave-2     Started                                                                                                                                                                                0.1s ✔ Container redis-sentinel-1  Started                                                                                                                                                                                0.1s ✔ Container redis-sentinel-2  Started                                                                                                                                                                                0.1s ✔ Container redis-sentinel-3  Started                                                                                                                                                                                0.1s ✔ Container redis-master      Started                                                                                                                                                                                0.1s ✔ Container redis-slave-1     Started        

集群启动好以后,测试是否正常启动

[root@docker_124 sentinel]# docker run -it --rm redis redis-cli -h 10.4.7.124 -p 6379 info replication
# Replication
role:master
connected_slaves:2
slave0:ip=172.17.0.1,port=6380,state=online,offset=170743,lag=1
slave1:ip=172.17.0.1,port=6381,state=online,offset=170743,lag=0
master_failover_state:no-failover
master_replid:c85254ee815510a442514fa73aeba46fc8fb018f
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:170743
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:170743[root@docker_124 sentinel]# docker run -it --rm redis redis-cli -h 10.4.7.124 -p 6380
[root@docker_124 sentinel]# docker run -it --rm redis redis-cli -h 10.4.7.124 -p 6381
[root@docker_124 sentinel]# docker run -it --rm redis redis-cli -h 10.4.7.124 -p 26380
[root@docker_124 sentinel]# docker run -it --rm redis redis-cli -h 10.4.7.124 -p 26381
[root@docker_124 sentinel]# docker run -it --rm redis redis-cli -h 10.4.7.124 -p 26379
10.4.7.124:26379> sentinel master mymaster1) "name"2) "mymaster"3) "ip"4) "10.4.7.124"5) "port"6) "6379"7) "runid"8) "8c21a5f4a8fdcabb3677603800a66a2b41c62f3c"9) "flags"
10) "master"……省略……[root@docker_124 sentinel]# docker run -it --rm redis redis-cli -h 10.4.7.124 -p 26379 sentinel slaves mymaster
1)  1) "name"2) "172.17.0.1:6381"3) "ip"4) "172.17.0.1"5) "port"6) "6381"7) "runid"8) "10053461cfeedbf53aec9f0afa66570f079483f6"9) "flags"10) "slave"……省略……

环境正常启动后可以运行Python脚本进行测试

测试python脚本

from redis.sentinel import Sentinel
import time
import random# 生成随机字符串
def generate_random_str(randomlength=16):random_str = ''base_str = 'ABCDEFGHIGKLMNOPQRSTUVWXYZabcdefghigklmnopqrstuvwxyz0123456789'length = len(base_str) - 1for i in range(randomlength):random_str += base_str[random.randint(0, length)]return random_str# 连接Redis Sentinel
sentinel = Sentinel([('10.4.7.124', 26379),('10.4.7.124', 26380),('10.4.7.124', 26381)],socket_timeout=0.5)# 获取主服务器地址
master = sentinel.master_for('mymaster', socket_timeout=0.5, db=0)
w_ret = master.set('foo', 'bar')
print(master)
# 输出:('192.168.31.87', 26379)
# 获取从服务器地址
slave = sentinel.slave_for('mymaster', socket_timeout=0.5, db=0)
print(slave)
# 输出:[('192.168.31.88', 26379)]while True:print('master:', master.get('foo'))# master 向redis 插入随机数据master.set('foo', generate_random_str(10))print('sleep 1s')time.sleep(1)

python 程序启动后会每秒请求sentinel地址获取redis连接设置值,然后我将sentinel集群的节点停掉两个(包括master节点),依然可以正常设置值,在redis的 master节点可以获取最新设置的值,说明sentinel节点停掉两个仍是可用状态。

参考文档

  • Dock-compose 搭建redis-sentinel测试环境

    https://www.cnblogs.com/leffss/p/12082361.html

  • python3连接redis sentinel集群

    https://blog.csdn.net/u012887259/article/details/102425691

  • 解决 WARNING: Published ports are discarded when using host network mode 问题

    https://blog.csdn.net/zengNLP/article/details/127220244

  • 安装 docker compose

    我安装完只能用docker compose 不能用docker-compose,不知道为什么。

    yum -y install docker-compose-plugin
    

    https://blog.csdn.net/pushiqiang/article/details/78682323

    https://zhuanlan.zhihu.com/p/570108654

这篇关于快速测试 3节点的redis sentinel集群宕机2个节点以后是否仍能正常使用的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!



http://www.chinasem.cn/article/467554

相关文章

Android kotlin中 Channel 和 Flow 的区别和选择使用场景分析

《Androidkotlin中Channel和Flow的区别和选择使用场景分析》Kotlin协程中,Flow是冷数据流,按需触发,适合响应式数据处理;Channel是热数据流,持续发送,支持... 目录一、基本概念界定FlowChannel二、核心特性对比数据生产触发条件生产与消费的关系背压处理机制生命周期

java使用protobuf-maven-plugin的插件编译proto文件详解

《java使用protobuf-maven-plugin的插件编译proto文件详解》:本文主要介绍java使用protobuf-maven-plugin的插件编译proto文件,具有很好的参考价... 目录protobuf文件作为数据传输和存储的协议主要介绍在Java使用maven编译proto文件的插件

Jenkins分布式集群配置方式

《Jenkins分布式集群配置方式》:本文主要介绍Jenkins分布式集群配置方式,具有很好的参考价值,希望对大家有所帮助,如有错误或未考虑完全的地方,望不吝赐教... 目录1.安装jenkins2.配置集群总结Jenkins是一个开源项目,它提供了一个容易使用的持续集成系统,并且提供了大量的plugin满

SpringBoot线程池配置使用示例详解

《SpringBoot线程池配置使用示例详解》SpringBoot集成@Async注解,支持线程池参数配置(核心数、队列容量、拒绝策略等)及生命周期管理,结合监控与任务装饰器,提升异步处理效率与系统... 目录一、核心特性二、添加依赖三、参数详解四、配置线程池五、应用实践代码说明拒绝策略(Rejected

C++ Log4cpp跨平台日志库的使用小结

《C++Log4cpp跨平台日志库的使用小结》Log4cpp是c++类库,本文详细介绍了C++日志库log4cpp的使用方法,及设置日志输出格式和优先级,具有一定的参考价值,感兴趣的可以了解一下... 目录一、介绍1. log4cpp的日志方式2.设置日志输出的格式3. 设置日志的输出优先级二、Window

Ubuntu如何分配​​未使用的空间

《Ubuntu如何分配​​未使用的空间》Ubuntu磁盘空间不足,实际未分配空间8.2G因LVM卷组名称格式差异(双破折号误写)导致无法扩展,确认正确卷组名后,使用lvextend和resize2fs... 目录1:原因2:操作3:报错5:解决问题:确认卷组名称​6:再次操作7:验证扩展是否成功8:问题已解

Qt使用QSqlDatabase连接MySQL实现增删改查功能

《Qt使用QSqlDatabase连接MySQL实现增删改查功能》这篇文章主要为大家详细介绍了Qt如何使用QSqlDatabase连接MySQL实现增删改查功能,文中的示例代码讲解详细,感兴趣的小伙伴... 目录一、创建数据表二、连接mysql数据库三、封装成一个完整的轻量级 ORM 风格类3.1 表结构

使用Docker构建Python Flask程序的详细教程

《使用Docker构建PythonFlask程序的详细教程》在当今的软件开发领域,容器化技术正变得越来越流行,而Docker无疑是其中的佼佼者,本文我们就来聊聊如何使用Docker构建一个简单的Py... 目录引言一、准备工作二、创建 Flask 应用程序三、创建 dockerfile四、构建 Docker

Python使用vllm处理多模态数据的预处理技巧

《Python使用vllm处理多模态数据的预处理技巧》本文深入探讨了在Python环境下使用vLLM处理多模态数据的预处理技巧,我们将从基础概念出发,详细讲解文本、图像、音频等多模态数据的预处理方法,... 目录1. 背景介绍1.1 目的和范围1.2 预期读者1.3 文档结构概述1.4 术语表1.4.1 核

Python使用pip工具实现包自动更新的多种方法

《Python使用pip工具实现包自动更新的多种方法》本文深入探讨了使用Python的pip工具实现包自动更新的各种方法和技术,我们将从基础概念开始,逐步介绍手动更新方法、自动化脚本编写、结合CI/C... 目录1. 背景介绍1.1 目的和范围1.2 预期读者1.3 文档结构概述1.4 术语表1.4.1 核