How to configure redis sentinel mode in Docker (on multiple servers)

# 1. Update the compilation environment yum -y install gcc

# 2. Same as above yum -y install gcc-c++

# 3. Install Docker
# 3.1 Uninstall the old version yum remove docker \
   docker-client \
   docker-client-latest \
   docker-common \
   docker-latest \
   docker-latest-logrotate \
   docker-logrotate \
   docker-engine
# 3.2 Install the required installation package yum install -y yum-utils
# 3.3 Set up the mirror warehouse. It is recommended to use domestic mirrors, which are faster. yum-config-manager \
 --add-repo \
 https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# 3.4 Update the yum package index. The function is to cache the package locally. yum makecache 
# 3.5 Install docker-ce community version related to docker yum install -y https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/edge/Packages/containerd.io-1.2.13-3.1.el7.x86_64.rpm
# 3.6 Install yum install docker-ce docker-ce-cli containerd.io
# 3.7 Start Docker
systemctl start docker
# 3.8 Set to start in the background systemctl enable docker 
# 3.9 Use docker version to check whether it is successful
# 3.10 Test (optional)
docker run hello-world
# 3.11 Uninstall and delete (for reference only, not done this time)
yum remove docker-ce docker-ce-cli containerd.io
rm -rf /var/lib/docker

# 4. Configure the accelerator sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
 "registry-mirrors": ["https://qdxc3615.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

# scp local_file remote_username@remote_ip:remote_folder
scp redis.conf [email protected]:/blue/redis02

cd /
mkdir blue && cd blue
mkdir redis02 && cd redis02

vi Dockerfile

# The Dockerfile content is as follows:
# Inherit from the base image redis FROM redis
MAINTAINER blue<[email protected]>

# Copy the files in the directory where Dockerfile is located to the container /usr/local/etc/redis directory COPY redis.conf /usr/local/etc/redis/redis.conf

# Install some environments RUN apt-get update
RUN apt-get install -y vim
RUN apt-get install procps --assume-yes

VOLUME ["/data"]

WORKDIR /etc/redis

# Open port 7000
EXPOSE 7000

# Start CMD using the configuration file [ "redis-server", "/usr/local/etc/redis/redis.conf"]

# Comment out bind 127.0.0.1 
# bind 127.0.0.1

port 7000

# If yes here, it will affect the use of configuration files to start daemonize no

pidfile /var/run/redis_7000.pid

# You need to set the following two passwords, and the passwords must be consistent requirepass testmaster123
masterauth testmaster123

# Modify the protection mode. If it is yes, external servers will be inaccessible. protected-mode no

# For server 3, you need to add a sentence to indicate that it is the slave server of server 1 # slaveof host.machine.IP port slaveof 8.131.78.18 7000

# You should use docker build -t myredis . It is more recognizable, but it succeeded when I tested it, so I don't want to change it. This sentence creates a new image based on our Dockerfile. You can push it to the warehouse so that you can pull it directly next time.
docker build -t test .

# Start the container docker run -d -p 7000:7000 --name redis-test test

# The following statement views the running container docker ps

#Enter the container docker exec -it redis-test /bin/bash

# View the running threads ps -ef

# Use the redis client to access port 7000 redis-cli -p 7000

# Enter the password auth testmaster123

# View information info replication

# The following is the information returned from the node # Replication
role:slave
master_host:8.131.78.18
master_port:7000
master_link_status:up
master_last_io_seconds_ago:10
master_sync_in_progress:0
slave_repl_offset:28
slave_priority:100
slave_read_only:1
connected_slaves:0
master_replid:438c700922a30ebbc66ee5c89a176c426924b2a7
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:28
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:28