redis-docker-single-machine master-slave sentinel deployment

redis-docker-single-machine master-slave sentinel deployment

1. redis stand-alone

Adjust system parameters

sudo vi /etc/rc.local

加入
echo never > /sys/kernel/mm/transparent_hugepage/enabled 

sudo vi /etc/sysctl.conf

加入
vm.overcommit_memory = 1

Create redis-related folders in the user directory

mkdir -p /home/jun/docker/redis
cd /home/jun/docker/redis
创建三个目录
mkdir shell  #构建、启动、停止等脚本
mkdir dockerfile  #dockerfile目录
mkdir volumes  #挂载配置、日志、数据文件

Prepare dockerfile

cd dockerfile

vim Dockerfile

Dockerfile contents

FROM centos:7.7.1908

# 创建者
MAINTAINER hbj

run yum install -y wget install make gcc libgcc gcc-c++ glibc-devel make && mkdir -p /docker/redis/{install,conf,data,log} && cd /docker/redis/install  && wget -O redis.tar.gz "http://download.redis.io/releases/redis-5.0.3.tar.gz" && tar xvzf redis.tar.gz && cd redis-5.0.3 && make && make install PREFIX=/docker/redis   && rm -rf /docker/redis/install/*.gz

USER hd
EXPOSE 6379
CMD ["/docker/redis/bin/redis-server","/docker/redis/conf/6379.conf"]

Build image through dockerfile

cd /home/hd/docker/redis/dockerfile

vim Dockerfile

Dockerfile contents

FROM centos:7.7.1908

# 创建者
MAINTAINER hbj

run yum install -y wget install make gcc libgcc gcc-c++ glibc-devel make && mkdir -p /docker/redis/{install,conf,data,log} && cd /docker/redis/install  && wget -O redis.tar.gz "http://download.redis.io/releases/redis-5.0.3.tar.gz" && tar xvzf redis.tar.gz && cd redis-5.0.3 && make && make install PREFIX=/docker/redis  && useradd hd  && chown -R hd:hd /docker/redis  && rm -rf /docker/redis/install/*.gz

USER hd
EXPOSE 6379
CMD ["/docker/redis/bin/redis-server","/docker/redis/conf/6379.conf"]

Build image through dockerfile

Create a shell script file

build script: build docker image

vi build

#!/bin/bash
DOCKER_PATH=$PWD/../
sudo docker build -f $DOCKER_PATH/dockerfile/Dockerfile  -t redis:v1 $DOCKER_PATH/dockerfile/

run script

vi run: Build and start the docker container

#!/bin/sh
DOCKER_PATH=$PWD/../
port=6379
version=v1
imageName=redis
sudo docker run  -d -p ${port}:6379 --name  redis  -v /etc/localtime:/etc/localtime -v $DOCKER_PATH/volumes/conf:/docker/redis/conf  -v $DOCKER_PATH/volumes/data:/docker/redis/data -v $DOCKER_PATH/volumes/log:/docker/redis/log  --restart=unless-stopped  ${imageName}:${version}  /docker/redis/bin/redis-server /docker/redis/conf/${port}.conf

exec script

vi exec: Enter the docker container that has been successfully started

#!/bin/sh
sudo docker exec -it redis /bin/bash

logs script

vi logs: Docker container log When starting the container fails, you can execute the query log

#!/bin/bash
sudo docker logs redis

restart

vi restart: docker container restart

#!/bin/sh
sudo docker restart redis

rm

vi rm: delete docker container

#!/bin/sh
sudo docker rm redis

rmi

vi rmi: Delete the docker image and it needs to be executed only when the dockerfile file is modified.

#!/bin/sh
sudo docker rmi redis:v1

start

vi start: start docker container

#!/bin/sh
sudo docker start  redis

stop

vi stop: stop docker container

#!/bin/sh
sudo docker stop redis

The docker script execution sequence is as follows:

1. If there is no built image when it is new, you need to build -> run
2. If the run fails, you can use logs to query the logs
3. If it fails, restart the container (without changing the dockerfile) and then stop-》rm->run
4. If the dockerfile is modified and it is started, stop->rm->rmi->build->run
5. If you just restart without modifying the file, restart or stop-》start

3.4 redis configuration file

logfile /docker/redis/log/6379.log
dir /docker/redis/data/
# requirepass 123456
daemonize no
#bind 127.0.0.1

Place the configuration file in volumes/conf/6379.conf in the same directory as the run script mounting directory.

Start and view

First execute ./build -> run

View docker container status

sudo docker ps -a

View log

./logs 
或者
sudo docker logs redis

Permission settings:

文件权限
chown -R hd:hd /home/hd/docker-files/redis
可执行文件
chmod +x /home/hd/docker-files/redis/shell/*

2. redis master-slave mode

i.安装主从节点redis服务


分别安装和配置主节点redis服务和从节点redis服务，方法参见单机模式的安装和配置

1、从节点的redis服务需要安装在6380端口，安装redis在不同端口  (如果在不同的服务器,大可不必)

2、主从节点必须设置访问密码 ，不要设置也可以。。。但基本都会设置
 requirepass 123456

1. Adjust slave node redis configuration

   Open the configuration file 6379.conf

   sudo vi /home/hd/redis/volumes/conf/6379.conf
   

   Find the following line

   # replicaof <masterip> <masterport>
   

   Modify to (where 127.0.0.1 and 6379 should be set to the IP and actual port of the redis master node according to the actual situation, here are the local and default ports)

   replicaof 127.0.0.1 6379
   

   The master node and slave node have set access passwords, and the slave nodes need to be configured as follows respectively.

   Find the following line

   # masterauth <master-password>
   

   Modify it to (123456 is assumed to be the access password and needs to be modified according to the actual situation)

   masterauth 123456 
   

   Restart the redis service of the master-slave node

verify

进入master数据库，写入一个数据，再进入一个slave数据库，立即便可访问刚才写入master数据库的数据。如下所示
主：redis-cli
> auth 123456
> set site blog.jboost
> get site
> info replication
从：redis-cli
>auth 123456
> get site

Five redis sentinel configuration

Others are the same as redis. You can refer to the stand-alone deployment of Redis.

Only the script port and configuration file are different, but the script build is the same because the image is the same, but the container is different.

The port numbers are 26379 26380 26381

vi run changes the port number and docker name startup method

#!/bin/sh
DOCKER_PATH=$PWD/../
port=26379
version=v1
imageName=redis
sudo docker run  -d -p ${port}:26379 --name  redis-sentine-1  -v /etc/localtime:/etc/localtime -v $DOCKER_PATH/volumes/conf:/docker/redis/conf  -v $DOCKER_PATH/volumes/data:/docker/redis/data -v $DOCKER_PATH/volumes/log:/docker/redis/log  --restart=unless-stopped  ${imageName}:${version}  /docker/redis/bin/redis-server /docker/redis/conf/${port}.conf --sentinel

exec

vi exec

#!/bin/sh
sudo docker exec -it redis-sentine-1 /bin/bash

logs script

vi window

#!/bin/bash
sudo docker logs redis-sentine-1

restart

we restart

#!/bin/sh
sudo docker restart redis-sentine-1

rm

vi rm

#!/bin/sh
sudo docker rm redis-sentine-1

rmi

I'm sorry

#!/bin/sh
sudo docker rmi redis:v1

start

we start

#!/bin/sh
sudo docker start  redis-sentine-1

stop

we stop

#!/bin/sh
sudo docker stop redis-sentine-1

Sentinel configuration file

Modify the sentinel monitor to (127.0.0.1 and 6379 should be set to the IP and actual port of the redis master node according to the actual situation, here are the local machine and the default port) without a password

1. Key point: If the sentinel wants to switch, the master-slave configuration needs to configure a password, not just the slave machine
2. Key point: There will be a problem in docker deployment. Sentinel communication problem, you need to configure sentinel announce-ip 192.212.8.117 This is Communication address, otherwise the default is docker internal network card

sentinel announce-ip 10.212.8.117
port 26381
daemonize no
pidfile /var/run/redis-sentinel.pid
logfile /docker/redis/log/sentinel.log
dir /docker/redis/data/
sentinel monitor appmaster 192.212.8.114 6379 2
sentinel down-after-milliseconds appmaster 10000
sentinel failover-timeout appmaster 180000
sentinel parallel-syncs appmaster 1
sentinel auth-pass appmaster 123456
bind 0.0.0.0

Check

Execute the exec script in the shell folder to enter the container

./exec
cd docker/redis/bin

./redis-cli -p 26379

127.0.0.1:26379> info
127.0.0.1:26379>sentinel master appmaster
127.0.0.1:26379>sentinel slaves appmaster