Redis 哨兵搭建
Redis哨兵(sentinel)搭建 7.2.5
文章目录
- 一、单节点哨兵
- 1. 环境介绍
- 2. 环境前准备工作
- 3. 安装 Redis 7.2.5
- 4. redis 配置修改并且启动
- 4.1 修改配置文件
- 4.2 编写启动脚本
- 5. 开启主从
- 5.1 开启
- 5.2 主库实例查看主从信息
- 6. 创建sentinel的配置文件并启动
- 6.1 创建配置文件
- 6.2 启动
- 6.3 手动停止主库运行，模拟主库宕机
- 6.4 手动修复宕机的主库，sentinel会自动发现
- 二、多节点哨兵
- 1.Redis配置文件修改并启动
- 1.1 redis_master 节点
- 1.2 redis_slave1 节点
- 1.3 redis_slave2 节点
- 2. 开启主从
- 2.1 redis_slave1 节点
- 2.2 redis_slave2 节点
- 2.3 redis_master 节点
- 3. 编写sentinel配置文件并启动
- 3.1 redis_master 节点
- 3.2 redis_slave1 节点
- 3.3 redis_slave2 节点
- 4. 验证sentinel能够自动切换
- 4.1 手动停止主库运行,模拟主库宕机
- 4.2 当16370 实例宕机后,查看集群情况
- 4.3 恢复16370 实例会成为slaves节点
- 5. 手动停掉一个sentinel实例
- 5.1 将redis_master主机中的sentinel实例给停止掉
- 5.2 验证主从切换
- 5.3 恢复Redis 实例
- 6. 手动停掉两个sentinel 实例
- 6.1 将redis_slave1 主机中的sentinel 实例停止
- 6.2 验证主从切换
一、单节点哨兵
1. 环境介绍
| 操作系统 | Centos 7 |
|---|---|
| 内核版本 | Linux 3.10.0-957.el7.x86_64 |
| 主机名称 | master |
| IP | 192.168.1.100 |
| 端口 | master:16370 slaver1:16371 slaver2: 16372 sentinel:16379 |
2. 环境前准备工作
# 关闭防火墙
systemctl stop firewalld
systemctl disable firewalld# 修改 hostname
hostnamectl set-hostname xxxx # 修改后退出当前终端重新连接即可# 更新下软件源
# 地址 https://developer.aliyun.com/mirror/# 时区调整，时间校准
date -R
timedatectl set-timezone Asia/Shanghai
yum -y install ntp
ntpdate ntp1.aliyun.com# 关闭 selinux：
sed -i 's/enforcing/disabled/' /etc/selinux/config
setenforce 0# 修改内存分配控制
vi /etc/sysctl.confvm.overcommit_memory = 1
# 设置TPC积压值
net.core.somaxconn= 1024# 使其配置文件生效
sysctl -p /etc/sysctl.conf
3. 安装 Redis 7.2.5
# 下载地址
http://download.redis.io/releases/# 下载
wget http://download.redis.io/releases/redis-7.2.5.tar.gz
# 解压
tar -xf redis-7.2.5.tar.gz -C /opt/redis# 编译
make MALLOC=libc# 安装 注意如果安装提示python3不存在 执行 yum install -y python3
make install PREFIX=/usr/local/redis# 配置环境变量
vi /etc/profile.d/redis.sh#!/bin/bashexport REDIS_HOME=/usr/local/redis
export PATH=$PATH:$REDIS_HOME/bin # 使其配置生效
source /etc/profile.d/redis.sh
4. redis 配置修改并且启动
4.1 修改配置文件
# 创建redis数据存储目录
mkdir -p /usr/local/redis/data/1637{0..2}
# 创建redis配置文件存储目录
mkdir -p /usr/local/redis/conf/1637{0..2}
# 创建redis日志存储目录
mkdir -p /usr/local/redis/log/1637{0..2}# 创建redis pid存储目录
mkdir /usr/local/redis/run# redis配置文件 16370
# 开启保护模式
protected-mode yes
# 添加本机的ip
bind 192.168.1.100
# 端口
port 16370
# pid存储目录
pidfile /usr/local/redis/run/redis_16370.pid
# 日志存储目录
logfile /usr/local/redis/log/16370/redis_16370.log
# 数据存储目录，目录要提前创建好
dir /usr/local/redis/data/16370
# 设置实例的验证口令
requirepass dongdong
# 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。
# 此配置项中值需要和master机器的“requirepass”保持一致
masterauth dongdong
# 配置RDB持久化策略
save 900 1
save 300 10
save 60 10000
# 配置AOF持久化
appendonly yes
appendfsync everysec
# 守护进程
daemonize yes # redis配置文件 16371
# 开启保护模式
protected-mode yes
# 添加本机的ip
bind 192.168.1.100
# 端口
port 16371
# pid存储目录
pidfile /usr/local/redis/run/redis_16371.pid
# 日志存储目录
logfile /usr/local/redis/log/16370/redis_16371.log
# 数据存储目录，目录要提前创建好
dir /usr/local/redis/data/16371
# 设置实例的验证口令
requirepass dongdong
# 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。
# 此配置项中值需要和master机器的“requirepass”保持一致
masterauth dongdong
# 配置RDB持久化策略
save 900 1
save 300 10
save 60 10000
# 配置AOF持久化
appendonly yes
appendfsync everysec
# 守护进程
daemonize yes # redis配置文件 16372
# 开启保护模式
protected-mode yes
# 添加本机的ip
bind 192.168.1.100
# 端口
port 16372
# pid存储目录
pidfile /usr/local/redis/run/redis_16372.pid
# 日志存储目录
logfile /usr/local/redis/log/16370/redis_16372.log
# 数据存储目录，目录要提前创建好
dir /usr/local/redis/data/16372
# 设置实例的验证口令
requirepass dongdong
# 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。
# 此配置项中值需要和master机器的“requirepass”保持一致
masterauth dongdong
# 配置RDB持久化策略
save 900 1
save 300 10
save 60 10000
# 配置AOF持久化
appendonly yes
appendfsync everysec
# 守护进程
daemonize yes # 复制下面命令即可
cat > /usr/local/redis/conf/redis_16370.conf <<EOF
# 开启保护模式
protected-mode yes
# 添加本机的ip
bind 192.168.1.100
# 端口
port 16370
# pid存储目录
pidfile /usr/local/redis/run/redis_16370.pid
# 日志存储目录
logfile /usr/local/redis/log/16370/redis_16370.log
# 数据存储目录，目录要提前创建好
dir /usr/local/redis/data/16370
# 设置实例的验证口令
requirepass dongdong
# 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。
# 此配置项中值需要和master机器的“requirepass”保持一致
masterauth dongdong
# 配置RDB持久化策略
save 900 1
save 300 10
save 60 10000
# 配置AOF持久化
appendonly yes
appendfsync everysec
# 守护进程
daemonize yes
EOFcat > /usr/local/redis/conf/redis_16371.conf <<EOF
# 开启保护模式
protected-mode yes
# 添加本机的ip
bind 192.168.1.100
# 端口
port 16371
# pid存储目录
pidfile /usr/local/redis/run/redis_16371.pid
# 日志存储目录
logfile /usr/local/redis/log/16370/redis_16371.log
# 数据存储目录，目录要提前创建好
dir /usr/local/redis/data/16371
# 设置实例的验证口令
requirepass dongdong
# 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。
# 此配置项中值需要和master机器的“requirepass”保持一致
masterauth dongdong
# 配置RDB持久化策略
save 900 1
save 300 10
save 60 10000
# 配置AOF持久化
appendonly yes
appendfsync everysec
# 守护进程
daemonize yes
EOFcat > /usr/local/redis/conf/redis_16372.conf <<EOF
# 开启保护模式
protected-mode yes
# 添加本机的ip
bind 192.168.1.100
# 端口
port 16372
# pid存储目录
pidfile /usr/local/redis/run/redis_16372.pid
# 日志存储目录
logfile /usr/local/redis/log/16370/redis_16372.log
# 数据存储目录，目录要提前创建好
dir /usr/local/redis/data/16372
# 设置实例的验证口令
requirepass dongdong
# 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。
# 此配置项中值需要和master机器的“requirepass”保持一致
masterauth dongdong
# 配置RDB持久化策略
save 900 1
save 300 10
save 60 10000
# 配置AOF持久化
appendonly yes
appendfsync everysec
# 守护进程
daemonize yes
EOF
4.2 编写启动脚本
# 启动脚本
cat > /usr/local/redis/bin/master-slave_start.sh << EOF
#!/bin/bashredis-server /usr/local/redis/conf/redis_16370.conf
redis-server /usr/local/redis/conf/redis_16371.conf
redis-server /usr/local/redis/conf/redis_16372.conf
EOF# 赋予可执行权限
chmod +x /usr/local/redis/bin/master-slave_start.sh# 关闭脚本
vi /usr/local/redis/bin/master-slave_shutdown.sh#!/bin/bashkill -9 $(ps -ef | grep 1637 | grep -v grep | awk '{print $2}')# 赋予可执行权限
chmod +x /usr/local/redis/bin/master-slave_shutdown.sh
5. 开启主从
5.1 开启
# 以"192.168.1.100:16370"实例为主库，以"192.168.1.100:16371"实例和"192.168.1.100:16372"实例为从库。
# -a 参数指定密码
# 从库实例开启主从redis-cli -h 192.168.1.100 -p 16371 -a dongdong slaveof 192.168.1.100 16370redis-cli -h 192.168.1.100 -p 16372 -a dongdong slaveof 192.168.1.100 16370# Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.# 警告：在命令行界面上使用带有“-a”或“-u”选项的密码可能不安全。 可以忽略# 解决方式# redis-cli -h 192.168.1.100 -p 16371 -a dongdong --no-auth-warning slaveof 192.168.1.100 16370 5.2 主库实例查看主从信息
redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication [root@master-slave ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.1.100,port=16371,state=online,offset=8428,lag=0
slave1:ip=192.168.1.100,port=16372,state=online,offset=8428,lag=1
master_failover_state:no-failover
master_replid:a292603e2c96a6f451055e6d84a60795f81f2928
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:8428
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:8428
6. 创建sentinel的配置文件并启动
6.1 创建配置文件
# 创建redis数据存储目录
mkdir -p /usr/local/redis/data/16379
# 创建redis配置文件存储目录
mkdir -p /usr/local/redis/conf/16379
# 创建redis日志存储目录
mkdir -p /usr/local/redis/log/16379# 创建redis pid存储目录
mkdir /usr/local/redis/runcat > /usr/local/redis/conf/sentinel.conf <<EOF
bind 192.168.1.100
port 16379
dir /usr/local/redis/data/16379
sentinel monitor redis_master 192.168.1.100 16370 1
sentinel down-after-milliseconds redis_master 5000
sentinel auth-pass redis_master dongdong
EOF配置文件参数说明如下:sentinel monitor redis_master 192.168.1.100 16370 1:指定Redis初始集群的master库节点并命名为"redis_master"，注意这个"1"的含义，他表示sentinel需要最少的投票数。这在于多sentinel的场景下很有用，由于本案例只是用了1个sentinel，因此我就设置为1。在生产环境中，建议配置多sentinel的模式，建议最少设置为3(建议设置奇数)个sentinel物理节点，而后将此处的"1"改为"2"，表示3个sentinel中最少有2个节点认为master库宕机时，才会真正意义上认为master库宕机。 sentinel down-after-milliseconds redis_master 5000:监控sentinel集群时，如果超过了5000毫秒(即5秒)仍然没有响应，则sentinel会判定master库宕机了。sentinel auth-pass redis_master dongdong:由于sentinel需要访问Redis集群，因此我们要设置访问整个集群的密码，我这里指定的密码为"dongdong"，这意味着所有的节点都使用相同的密码。
6.2 启动
# 启动 sentinel进程
redis-sentinel /usr/local/redis/conf/sentinel.conf &> /usr/local/redis/log/16379/sentinel_16379.log &root@master ~]# redis-sentin el /usr/local/redis/conf/sentinel.conf &> /usr/local/redis/log/16379/sentinel_16379.log &
[1] 29961# 查看日志
tail -100f /usr/local/redis/log/16379/sentinel_16379.log
[root@master ~]# tail -100f /usr/local/redis/log/16379/sentinel_16379.log
30008:X 17 Jul 2024 19:51:15.356 * oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
30008:X 17 Jul 2024 19:51:15.356 * Redis version=7.2.5, bits=64, commit=00000000, modified=0, pid=30008, just started
30008:X 17 Jul 2024 19:51:15.356 * Configuration loaded
30008:X 17 Jul 2024 19:51:15.356 * Increased maximum number of open files to 10032 (it was originally set to 1024).
30008:X 17 Jul 2024 19:51:15.356 * monotonic clock: POSIX clock_gettime
30008:X 17 Jul 2024 19:51:15.357 * Running mode=sentinel, port=16379.
30008:X 17 Jul 2024 19:51:15.357 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
30008:X 17 Jul 2024 19:51:15.357 * Sentinel ID is a91bf648c16246f3f7c7e1aa2b1fc6fad38f772b
30008:X 17 Jul 2024 19:51:15.357 # +monitor master redis_master 192.168.1.100 16370 quorum 1# 通过redis-cli 进入 查看
redis-cli -h 192.168.1.100 -p 16379[root@master ~]# redis-cli -h 192.168.1.100 -p 16379
192.168.1.100:16379> ping
PONG
192.168.1.100:16379>
6.3 手动停止主库运行，模拟主库宕机
# 切换前主从状态正常
[root@master ~]# ss -npl | grep redis
tcp LISTEN 0 128 192.168.1.100:16370 *:* users:(("redis-server",pid=29871,fd=6))
tcp LISTEN 0 128 192.168.1.100:16371 *:* users:(("redis-server",pid=29873,fd=6))
tcp LISTEN 0 128 192.168.1.100:16372 *:* users:(("redis-server",pid=29881,fd=6))
tcp LISTEN 0 128 192.168.1.100:16379 *:* users:(("redis-sentinel",pid=30008,fd=6))# 查看集群状态 master
redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication [root@master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.1.100,port=16371,state=online,offset=111085,lag=0
slave1:ip=192.168.1.100,port=16372,state=online,offset=111085,lag=1
master_failover_state:no-failover
master_replid:208227bbd586d90841dcf753ba669dbde246bba7
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:111085
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:111085# 查看集群状态 slaver
redis-cli -h 192.168.1.100 -p 16371 -a dongdong info replication [root@master ~]# redis-cli -h 192.168.1.100 -p 16371 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.100
master_port:16370
master_link_status:up
master_last_io_seconds_ago:2
master_sync_in_progress:0
slave_read_repl_offset:118087
slave_repl_offset:118087
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:208227bbd586d90841dcf753ba669dbde246bba7
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:118087
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:118073# 查看集群状态 slaver
redis-cli -h 192.168.1.100 -p 16372 -a dongdong info replication [root@master ~]# redis-cli -h 192.168.1.100 -p 16372 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.100
master_port:16370
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_read_repl_offset:126869
slave_repl_offset:126869
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:208227bbd586d90841dcf753ba669dbde246bba7
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:126869
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:126855# 手动将主库宕机，观察从库被sentinel实现了自动切换:
redis-cli -h 192.168.1.100 -p 16370 -a dongdong shutdown[root@master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong shutdown
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.# 再查看集群状态 master
redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication # 由于将主库服务停了，因此无法再次连接主库
[root@master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
Could not connect to Redis at 192.168.1.100:16370: Connection refused# 再查看集群状态 slaves 发现变成了master节点
redis-cli -h 192.168.1.100 -p 16371 -a dongdong info replication [root@master ~]# redis-cli -h 192.168.1.100 -p 16371 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:1
slave0:ip=192.168.1.100,port=16372,state=online,offset=150234,lag=0
master_failover_state:no-failover
master_replid:23729dc7d7aeafa6f85a2a647442965c80b379ed
master_replid2:208227bbd586d90841dcf753ba669dbde246bba7
master_repl_offset:150234
second_repl_offset:134150
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:150220# 查看集群状态 slaver
redis-cli -h 192.168.1.100 -p 16372 -a dongdong info replication [root@master ~]# redis-cli -h 192.168.1.100 -p 16372 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.100
master_port:16371
master_link_status:up
master_last_io_seconds_ago:2
master_sync_in_progress:0
slave_read_repl_offset:154406
slave_repl_offset:154406
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:23729dc7d7aeafa6f85a2a647442965c80b379ed
master_replid2:208227bbd586d90841dcf753ba669dbde246bba7
master_repl_offset:154406
second_repl_offset:134150
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:154392# 查看sentinel的日志信息，不难发现有记录切换的过程
tail -100f /usr/local/redis/log/16379/sentinel_16379.log[root@master ~]# tail -100f /usr/local/redis/log/16379/sentinel_16379.log
30008:X 17 Jul 2024 19:51:15.356 * oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
30008:X 17 Jul 2024 19:51:15.356 * Redis version=7.2.5, bits=64, commit=00000000, modified=0, pid=30008, just started
30008:X 17 Jul 2024 19:51:15.356 * Configuration loaded
30008:X 17 Jul 2024 19:51:15.356 * Increased maximum number of open files to 10032 (it was originally set to 1024).
30008:X 17 Jul 2024 19:51:15.356 * monotonic clock: POSIX clock_gettime
30008:X 17 Jul 2024 19:51:15.357 * Running mode=sentinel, port=16379.
30008:X 17 Jul 2024 19:51:15.357 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
30008:X 17 Jul 2024 19:51:15.357 * Sentinel ID is a91bf648c16246f3f7c7e1aa2b1fc6fad38f772b
30008:X 17 Jul 2024 19:51:15.357 # +monitor master redis_master 192.168.1.100 16370 quorum 1
30008:X 17 Jul 2024 20:15:40.962 # +sdown master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:40.962 # +odown master redis_master 192.168.1.100 16370 #quorum 1/1
30008:X 17 Jul 2024 20:15:40.962 # +new-epoch 1
30008:X 17 Jul 2024 20:15:40.962 # +try-failover master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:40.968 * Sentinel new configuration saved on disk
30008:X 17 Jul 2024 20:15:40.968 # +vote-for-leader a91bf648c16246f3f7c7e1aa2b1fc6fad38f772b 1
30008:X 17 Jul 2024 20:15:40.968 # +elected-leader master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:40.968 # +failover-state-select-slave master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:41.026 # +selected-slave slave 192.168.1.100:16371 192.168.1.100 16371 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:41.027 * +failover-state-send-slaveof-noone slave 192.168.1.100:16371 192.168.1.100 16371 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:41.093 * +failover-state-wait-promotion slave 192.168.1.100:16371 192.168.1.100 16371 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:42.015 * Sentinel new configuration saved on disk
30008:X 17 Jul 2024 20:15:42.015 # +promoted-slave slave 192.168.1.100:16371 192.168.1.100 16371 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:42.015 # +failover-state-reconf-slaves master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:42.096 * +slave-reconf-sent slave 192.168.1.100:16372 192.168.1.100 16372 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:43.040 * +slave-reconf-inprog slave 192.168.1.100:16372 192.168.1.100 16372 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:43.040 * +slave-reconf-done slave 192.168.1.100:16372 192.168.1.100 16372 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:43.094 # +failover-end master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:43.094 # +switch-master redis_master 192.168.1.100 16370 192.168.1.100 16371
30008:X 17 Jul 2024 20:15:43.095 * +slave slave 192.168.1.100:16372 192.168.1.100 16372 @ redis_master 192.168.1.100 16371
30008:X 17 Jul 2024 20:15:43.095 * +slave slave 192.168.1.100:16370 192.168.1.100 16370 @ redis_master 192.168.1.100 16371
30008:X 17 Jul 2024 20:15:43.100 * Sentinel new configuration saved on disk
30008:X 17 Jul 2024 20:15:48.121 # +sdown slave 192.168.1.100:16370 192.168.1.100 16370 @ redis_master 192.168.1.100 163716.4 手动修复宕机的主库，sentinel会自动发现
# 修复之前，16370端口是连接不上的
redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication[root@master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
Could not connect to Redis at 192.168.1.100:16370: Connection refused[root@master ~]# redis-cli -h 192.168.1.100 -p 16371 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:1
slave0:ip=192.168.1.100,port=16372,state=online,offset=190264,lag=1
master_failover_state:no-failover
master_replid:23729dc7d7aeafa6f85a2a647442965c80b379ed
master_replid2:208227bbd586d90841dcf753ba669dbde246bba7
master_repl_offset:190410
second_repl_offset:134150
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:190396[root@master ~]# redis-cli -h 192.168.1.100 -p 16372 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.100
master_port:16371
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_read_repl_offset:192204
slave_repl_offset:192204
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:23729dc7d7aeafa6f85a2a647442965c80b379ed
master_replid2:208227bbd586d90841dcf753ba669dbde246bba7
master_repl_offset:192204
second_repl_offset:134150
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:192190# 修复之后，之前宕机的主库会自动加入集群并成为slaves节点
redis-server /usr/local/redis/conf/redis_16370.conf
[root@master ~]# redis-server /usr/local/redis/conf/redis_16370.conf
[root@master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.100
master_port:16371
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_read_repl_offset:199215
slave_repl_offset:199215
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:23729dc7d7aeafa6f85a2a647442965c80b379ed
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:199215
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:199047
repl_backlog_histlen:169# 查看
redis-cli -h 192.168.1.100 -p 16371 -a dongdong info replicationredis-cli -h 192.168.1.100 -p 16372 -a dongdong info replication [root@master ~]# redis-cli -h 192.168.1.100 -p 16371 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:2 # slaves 变成两个了
slave0:ip=192.168.1.100,port=16372,state=online,offset=203533,lag=1
slave1:ip=192.168.1.100,port=16370,state=online,offset=203533,lag=1
master_failover_state:no-failover
master_replid:23729dc7d7aeafa6f85a2a647442965c80b379ed
master_replid2:208227bbd586d90841dcf753ba669dbde246bba7
master_repl_offset:203533
second_repl_offset:134150
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:203519[root@master ~]# redis-cli -h 192.168.1.100 -p 16372 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.100
master_port:16371
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_read_repl_offset:207851
slave_repl_offset:207851
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:23729dc7d7aeafa6f85a2a647442965c80b379ed
master_replid2:208227bbd586d90841dcf753ba669dbde246bba7
master_repl_offset:207851
second_repl_offset:134150
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:207837# 注意观察sentinel日志哟，会有新日志记录
tail -100f /usr/local/redis/log/16379/sentinel_16379.log
[root@master ~]# tail -100f /usr/local/redis/log/16379/sentinel_16379.log
30008:X 17 Jul 2024 19:51:15.356 * oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
30008:X 17 Jul 2024 19:51:15.356 * Redis version=7.2.5, bits=64, commit=00000000, modified=0, pid=30008, just started
30008:X 17 Jul 2024 19:51:15.356 * Configuration loaded
30008:X 17 Jul 2024 19:51:15.356 * Increased maximum number of open files to 10032 (it was originally set to 1024).
30008:X 17 Jul 2024 19:51:15.356 * monotonic clock: POSIX clock_gettime
30008:X 17 Jul 2024 19:51:15.357 * Running mode=sentinel, port=16379.
30008:X 17 Jul 2024 19:51:15.357 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
30008:X 17 Jul 2024 19:51:15.357 * Sentinel ID is a91bf648c16246f3f7c7e1aa2b1fc6fad38f772b
30008:X 17 Jul 2024 19:51:15.357 # +monitor master redis_master 192.168.1.100 16370 quorum 1
30008:X 17 Jul 2024 20:15:40.962 # +sdown master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:40.962 # +odown master redis_master 192.168.1.100 16370 #quorum 1/1
30008:X 17 Jul 2024 20:15:40.962 # +new-epoch 1
30008:X 17 Jul 2024 20:15:40.962 # +try-failover master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:40.968 * Sentinel new configuration saved on disk
30008:X 17 Jul 2024 20:15:40.968 # +vote-for-leader a91bf648c16246f3f7c7e1aa2b1fc6fad38f772b 1
30008:X 17 Jul 2024 20:15:40.968 # +elected-leader master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:40.968 # +failover-state-select-slave master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:41.026 # +selected-slave slave 192.168.1.100:16371 192.168.1.100 16371 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:41.027 * +failover-state-send-slaveof-noone slave 192.168.1.100:16371 192.168.1.100 16371 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:41.093 * +failover-state-wait-promotion slave 192.168.1.100:16371 192.168.1.100 16371 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:42.015 * Sentinel new configuration saved on disk
30008:X 17 Jul 2024 20:15:42.015 # +promoted-slave slave 192.168.1.100:16371 192.168.1.100 16371 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:42.015 # +failover-state-reconf-slaves master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:42.096 * +slave-reconf-sent slave 192.168.1.100:16372 192.168.1.100 16372 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:43.040 * +slave-reconf-inprog slave 192.168.1.100:16372 192.168.1.100 16372 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:43.040 * +slave-reconf-done slave 192.168.1.100:16372 192.168.1.100 16372 @ redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:43.094 # +failover-end master redis_master 192.168.1.100 16370
30008:X 17 Jul 2024 20:15:43.094 # +switch-master redis_master 192.168.1.100 16370 192.168.1.100 16371
30008:X 17 Jul 2024 20:15:43.095 * +slave slave 192.168.1.100:16372 192.168.1.100 16372 @ redis_master 192.168.1.100 16371
30008:X 17 Jul 2024 20:15:43.095 * +slave slave 192.168.1.100:16370 192.168.1.100 16370 @ redis_master 192.168.1.100 16371
30008:X 17 Jul 2024 20:15:43.100 * Sentinel new configuration saved on disk
30008:X 17 Jul 2024 20:15:48.121 # +sdown slave 192.168.1.100:16370 192.168.1.100 16370 @ redis_master 192.168.1.100 16371
30008:X 17 Jul 2024 20:30:15.529 # -sdown slave 192.168.1.100:16370 192.168.1.100 16370 @ redis_master 192.168.1.100 16371
30008:X 17 Jul 2024 20:30:25.504 * +convert-to-slave slave 192.168.1.100:16370 192.168.1.100 16370 @ redis_master 192.168.1.100 16371# 除了提到上面的变化外，还有一点变化就是配置文件也修改了，每个"slave"节点都新增了 下面三行 本案例只有192.168.1.100:16370 和 192.168.1.100:16372是 slave
# Generated by CONFIG REWRITE
replicaof 192.168.1.100 16371
latency-tracking-info-percentiles 50 99 99.9
user default on sanitize-payload #162fffe9f429e1fa5d351c11f5a7f2f3031806c5125eeb84993f68738cbb6c84 ~* &* +@all# Generated by CONFIG REWRITE
replicaof 192.168.1.100 16371
latency-tracking-info-percentiles 50 99 99.9
user default on sanitize-payload #162fffe9f429e1fa5d351c11f5a7f2f3031806c5125eeb84993f68738cbb6c84 ~* &* +@all二、多节点哨兵
一主两从三哨兵
一共三台机器，每台机器部署一个哨兵
注意： 后面启动哨兵可能会出现两个警告
WARNING Memory overcommit must be enabled! Without it, a background save or replication may fail under low memory condition. To fix this issue add ‘vm.overcommit_memory = 1’ to /etc/sysctl.conf and then reboot or run the command ‘sysctl vm.overcommit_memory=1’ for this to take effect.
警告：必须启用内存超量使用！没有它，在内存不足的情况下，后台保存或复制可能会失败。要解决此问题，请将“vm.overcommit_memory=1”添加到/etc/sysctl.conf中，然后重新启动或运行命令“sysctl vm.overcommit_memory=1”以使其生效。
修改内存分配控制
vi /etc/sysctl.conf
vm.overcommit_memory = 1
使其配置文件生效
sysctl -p /etc/sysctl.conf
WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
警告：无法强制执行TCP积压设置511，因为/proc/sys/net/core/somaxconn设置为较低的值128。
vi /etc/sysctl.conf
net.core.somaxconn= 1024
sysctl -p /etc/sysctl.conf
| 操作系统 | Centos 7 | Centos 7 | Centos 7 |
|---|---|---|---|
| 内核版本 | Linux 3.10.0-957.el7.x86_64 | Linux 3.10.0-957.el7.x86_64 | Linux 3.10.0-957.el7.x86_64 |
| 主机名称 | redis_master | redis_salve1 | redis_salve2 |
| IP | 192.168.1.100 | 192.168.1.200 | 192.168.1.250 |
| 端口 | 16370、26370 | 16371、26370 | 16372、26370 |
安装前准备工作已经Redis安装,请参照上面步骤进行
1.Redis配置文件修改并启动
1.1 redis_master 节点
# 创建redis数据存储目录
mkdir -p /usr/local/redis/data/16370
# 创建redis配置文件存储目录
mkdir -p /usr/local/redis/conf/16370
# 创建redis日志存储目录
mkdir -p /usr/local/redis/log/16370# 创建redis pid存储目录
mkdir /usr/local/redis/run/16370# 修改配置文件
# 复制下面命令即可
cat > /usr/local/redis/conf/16370/redis_16370.conf <<EOF
# 开启保护模式
protected-mode yes
# 添加本机的ip
bind 192.168.1.100
# 端口
port 16370
# pid存储目录
pidfile /usr/local/redis/run/16370/redis_16370.pid
# 日志存储目录
logfile /usr/local/redis/log/16370/redis_16370.log
# 数据存储目录，目录要提前创建好
dir /usr/local/redis/data/16370
# 设置实例的验证口令
requirepass dongdong
# 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。
# 此配置项中值需要和master机器的“requirepass”保持一致
masterauth dongdong
# 配置RDB持久化策略
save 900 1
save 300 10
save 60 10000
# 配置AOF持久化
appendonly yes
appendfsync everysec
# 守护进程
daemonize yes
EOF# 启动Redis
redis-server /usr/local/redis/conf/16370/redis_16370.conf
1.2 redis_slave1 节点
# 创建redis数据存储目录
mkdir -p /usr/local/redis/data/16371
# 创建redis配置文件存储目录
mkdir -p /usr/local/redis/conf/16371
# 创建redis日志存储目录
mkdir -p /usr/local/redis/log/16371# 创建redis pid存储目录
mkdir /usr/local/redis/run/16371# 修改配置文件
# 复制下面命令即可
cat > /usr/local/redis/conf/16371/redis_16371.conf <<EOF
# 开启保护模式
protected-mode yes
# 添加本机的ip
bind 192.168.1.200
# 端口
port 16371
# pid存储目录
pidfile /usr/local/redis/run/16371/redis_16371.pid
# 日志存储目录
logfile /usr/local/redis/log/16371/redis_16371.log
# 数据存储目录，目录要提前创建好
dir /usr/local/redis/data/16371
# 设置实例的验证口令
requirepass dongdong
# 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。
# 此配置项中值需要和master机器的“requirepass”保持一致
masterauth dongdong
# 配置RDB持久化策略
save 900 1
save 300 10
save 60 10000
# 配置AOF持久化
appendonly yes
appendfsync everysec
# 守护进程
daemonize yes
EOF# 启动Redis
redis-server /usr/local/redis/conf/16371/redis_16371.conf
1.3 redis_slave2 节点
# 创建redis数据存储目录
mkdir -p /usr/local/redis/data/16372
# 创建redis配置文件存储目录
mkdir -p /usr/local/redis/conf/16372
# 创建redis日志存储目录
mkdir -p /usr/local/redis/log/16372# 创建redis pid存储目录
mkdir /usr/local/redis/run/16372# 修改配置文件
# 复制下面命令即可
cat > /usr/local/redis/conf/16372/redis_16372.conf <<EOF
# 开启保护模式
protected-mode yes
# 添加本机的ip
bind 192.168.1.250
# 端口
port 16372
# pid存储目录
pidfile /usr/local/redis/run/16372/redis_16372.pid
# 日志存储目录
logfile /usr/local/redis/log/16372/redis_16372.log
# 数据存储目录，目录要提前创建好
dir /usr/local/redis/data/16372
# 设置实例的验证口令
requirepass dongdong
# 以认证的方式连接到master。 如果master中使用了“密码保护”，slave必须交付正确的授权密码，才能连接成功。
# 此配置项中值需要和master机器的“requirepass”保持一致
masterauth dongdong
# 配置RDB持久化策略
save 900 1
save 300 10
save 60 10000
# 配置AOF持久化
appendonly yes
appendfsync everysec
# 守护进程
daemonize yes
EOF# 启动Redis
redis-server /usr/local/redis/conf/16372/redis_16372.conf
2. 开启主从
2.1 redis_slave1 节点
# 从库实例开启主从
redis-cli -h 192.168.1.200 -p 16371 -a dongdong slaveof 192.168.1.100 16370[root@redis_slave1 ~]# redis-cli -h 192.168.1.200 -p 16371 -a dongdong slaveof 192.168.1.100 16370
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
OK# 从库实例查看主从信息
redis-cli -h 192.168.1.200 -p 16371 -a dongdong info replication [root@redis_slave1 ~]# redis-cli -h 192.168.1.200 -p 16371 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.100
master_port:16370
master_link_status:up
master_last_io_seconds_ago:9
master_sync_in_progress:0
slave_read_repl_offset:210
slave_repl_offset:210
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:466362240f16a7414b9236f931c6f97252ee00be
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:210
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:196
2.2 redis_slave2 节点
# 从库实例开启主从
redis-cli -h 192.168.1.250 -p 16372 -a dongdong slaveof 192.168.1.100 16370[root@redis_slave2 ~]# redis-cli -h 192.168.1.250 -p 16372 -a dongdong slaveof 192.168.1.100 16370
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
OK# 从库实例查看主从信息
redis-cli -h 192.168.1.250 -p 16372 -a dongdong info replication [root@redis_slave2 ~]# redis-cli -h 192.168.1.250 -p 16372 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.100
master_port:16370
master_link_status:up
master_last_io_seconds_ago:10
master_sync_in_progress:0
slave_read_repl_offset:266
slave_repl_offset:266
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:466362240f16a7414b9236f931c6f97252ee00be
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:266
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:43
repl_backlog_histlen:224
2.3 redis_master 节点
# 主库实例查看主从信息
redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication [root@redis_master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.1.200,port=16371,state=online,offset=42,lag=0
slave1:ip=192.168.1.250,port=16372,state=online,offset=42,lag=1
master_failover_state:no-failover
master_replid:466362240f16a7414b9236f931c6f97252ee00be
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:56
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:56
3. 编写sentinel配置文件并启动
3.1 redis_master 节点
# 创建redis数据存储目录
mkdir -p /usr/local/redis/data/26370
# 创建redis配置文件存储目录
mkdir -p /usr/local/redis/conf/26370
# 创建redis日志存储目录
mkdir -p /usr/local/redis/log/26370# 创建redis pid存储目录
mkdir /usr/local/redis/run/26370cat > /usr/local/redis/conf/26370/sentinel.conf <<EOF
bind 192.168.1.100
port 26370
dir /usr/local/redis/data/26370
sentinel monitor redis_master 192.168.1.100 16370 2
sentinel down-after-milliseconds redis_master 5000
sentinel auth-pass redis_master dongdong
EOF# 启动 sentinel进程
redis-sentinel /usr/local/redis/conf/26370/sentinel.conf &> /usr/local/redis/log/26370/sentinel_26370.log &[root@redis_master ~]# redis-sentinel /usr/local/redis/conf/26370/sentinel.conf &> /usr/local/redis/log/26370/sentinel_26370.log &
[1] 30569# 查看redis-sentinel 进程
[root@redis_master ~]# ps -ef | grep redis
root 30552 1 0 10:17 ? 00:00:01 redis-server 192.168.1.100:16370
root 30569 30499 0 10:33 pts/1 00:00:00 redis-sentinel 192.168.1.100:26370 [sentinel] # 已经成功启动了
root 30574 30499 0 10:34 pts/1 00:00:00 grep --color=auto redis# 查看日志信息
tail -100f /usr/local/redis/log/26370/sentinel_26370.log[root@redis_master ~]# tail -100f /usr/local/redis/log/26370/sentinel_26370.log
30569:X 18 Jul 2024 10:33:50.636 * oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
30569:X 18 Jul 2024 10:33:50.636 * Redis version=7.2.5, bits=64, commit=00000000, modified=0, pid=30569, just started
30569:X 18 Jul 2024 10:33:50.636 * Configuration loaded
30569:X 18 Jul 2024 10:33:50.636 * Increased maximum number of open files to 10032 (it was originally set to 1024).
30569:X 18 Jul 2024 10:33:50.636 * monotonic clock: POSIX clock_gettime
30569:X 18 Jul 2024 10:33:50.637 * Running mode=sentinel, port=26370.
30569:X 18 Jul 2024 10:33:50.637 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
30569:X 18 Jul 2024 10:33:50.638 * Sentinel new configuration saved on disk
30569:X 18 Jul 2024 10:33:50.639 * Sentinel ID is 088b671eb4ac4c8d8a57805c1be88e4f76cf7ff8
30569:X 18 Jul 2024 10:33:50.639 # +monitor master redis_master 192.168.1.100 26370 quorum 2
30569:X 18 Jul 2024 10:33:52.638 * +sentinel sentinel 088b671eb4ac4c8d8a57805c1be88e4f76cf7ff8 192.168.1.100 26370 @ redis_master 192.168.1.100 26370
30569:X 18 Jul 2024 10:33:52.644 * Sentinel new configuration saved on disk3.2 redis_slave1 节点
# 创建redis数据存储目录
mkdir -p /usr/local/redis/data/26370
# 创建redis配置文件存储目录
mkdir -p /usr/local/redis/conf/26370
# 创建redis日志存储目录
mkdir -p /usr/local/redis/log/26370# 创建redis pid存储目录
mkdir /usr/local/redis/run/26370cat > /usr/local/redis/conf/26370/sentinel.conf <<EOF
bind 192.168.1.200
port 26370
dir /usr/local/redis/data/26370
sentinel monitor redis_master 192.168.1.100 16370 2
sentinel down-after-milliseconds redis_master 5000
sentinel auth-pass redis_master dongdong
EOF# 启动 sentinel进程
redis-sentinel /usr/local/redis/conf/26370/sentinel.conf &> /usr/local/redis/log/26370/sentinel_26370.log &[root@redis_slave1 ~]# redis-sentinel /usr/local/redis/conf/26370/sentinel.conf &> /usr/local/redis/log/26370/sentinel_26370.log &
[1] 38894# 查看redis-sentinel 进程
[root@redis_slave1 ~]# ps -ef | grep redis
root 38879 1 0 10:19 ? 00:00:01 redis-server 192.168.1.200:16371
root 38894 38840 0 10:36 pts/0 00:00:00 redis-sentinel 192.168.1.200:26370 [sentinel]
root 38899 38840 0 10:37 pts/0 00:00:00 grep --color=auto redis# 查看日志信息
tail -100f /usr/local/redis/log/26370/sentinel_26370.log[root@redis_slave1 ~]# tail -100f /usr/local/redis/log/26370/sentinel_26370.log
38894:X 18 Jul 2024 10:36:54.115 # WARNING Memory overcommit must be enabled! Without it, a background save or replication may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
38894:X 18 Jul 2024 10:36:54.116 * oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
38894:X 18 Jul 2024 10:36:54.116 * Redis version=7.2.5, bits=64, commit=00000000, modified=0, pid=38894, just started
38894:X 18 Jul 2024 10:36:54.116 * Configuration loaded
38894:X 18 Jul 2024 10:36:54.116 * Increased maximum number of open files to 10032 (it was originally set to 1024).
38894:X 18 Jul 2024 10:36:54.116 * monotonic clock: POSIX clock_gettime
38894:X 18 Jul 2024 10:36:54.116 * Running mode=sentinel, port=26370.
38894:X 18 Jul 2024 10:36:54.116 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
38894:X 18 Jul 2024 10:36:54.119 * Sentinel new configuration saved on disk
38894:X 18 Jul 2024 10:36:54.119 * Sentinel ID is 93a83bf4770f1f8eda48b96ead065382ab2b5fe6
38894:X 18 Jul 2024 10:36:54.119 # +monitor master redis_slave1 192.168.1.200 26370 quorum 2
38894:X 18 Jul 2024 10:36:56.164 * +sentinel sentinel 93a83bf4770f1f8eda48b96ead065382ab2b5fe6 192.168.1.200 26370 @ redis_slave1 192.168.1.200 26370
38894:X 18 Jul 2024 10:36:56.170 * Sentinel new configuration saved on disk3.3 redis_slave2 节点
# 创建redis数据存储目录
mkdir -p /usr/local/redis/data/26370
# 创建redis配置文件存储目录
mkdir -p /usr/local/redis/conf/26370
# 创建redis日志存储目录
mkdir -p /usr/local/redis/log/26370# 创建redis pid存储目录
mkdir /usr/local/redis/run/26370cat > /usr/local/redis/conf/26370/sentinel.conf <<EOF
bind 192.168.1.250
port 26370
dir /usr/local/redis/data/26370
sentinel monitor redis_master 192.168.1.100 16370 2
sentinel down-after-milliseconds redis_master 5000
sentinel auth-pass redis_master dongdong
EOF# 启动 sentinel进程
redis-sentinel /usr/local/redis/conf/26370/sentinel.conf &> /usr/local/redis/log/26370/sentinel_26370.log &[root@redis_slave2 ~]# redis-sentinel /usr/local/redis/conf/26370/sentinel.conf &> /usr/local/redis/log/26370/sentinel_26370.log &
[1] 39310# 查看redis-sentinel 进程
[root@redis_slave2 ~]# ps -ef | grep redis
root 39290 1 0 10:20 ? 00:00:03 redis-server 192.168.1.250:16372
root 39310 39251 0 10:50 pts/0 00:00:00 redis-sentinel 192.168.1.250:26370 [sentinel]
root 39316 39251 0 10:51 pts/0 00:00:00 grep --color=auto redis# 查看日志信息tail -100f /usr/local/redis/log/26370/sentinel_26370.log[root@redis_slave2 ~]# tail -100f /usr/local/redis/log/26370/sentinel_26370.log
39310:X 18 Jul 2024 10:50:57.403 # WARNING Memory overcommit must be enabled! Without it, a background save or replication may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.
39310:X 18 Jul 2024 10:50:57.403 * oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
39310:X 18 Jul 2024 10:50:57.403 * Redis version=7.2.5, bits=64, commit=00000000, modified=0, pid=39310, just started
39310:X 18 Jul 2024 10:50:57.403 * Configuration loaded
39310:X 18 Jul 2024 10:50:57.404 * Increased maximum number of open files to 10032 (it was originally set to 1024).
39310:X 18 Jul 2024 10:50:57.404 * monotonic clock: POSIX clock_gettime
39310:X 18 Jul 2024 10:50:57.404 * Running mode=sentinel, port=26370.
39310:X 18 Jul 2024 10:50:57.405 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
39310:X 18 Jul 2024 10:50:57.407 * Sentinel new configuration saved on disk
39310:X 18 Jul 2024 10:50:57.407 * Sentinel ID is 9227635399651de294a88fa16281232b9cbbccaf
39310:X 18 Jul 2024 10:50:57.407 # +monitor master redis_slave2 192.168.1.250 26370 quorum 2
39310:X 18 Jul 2024 10:50:59.427 * +sentinel sentinel 9227635399651de294a88fa16281232b9cbbccaf 192.168.1.250 26370 @ redis_slave2 192.168.1.250 26370
39310:X 18 Jul 2024 10:50:59.434 * Sentinel new configuration saved on disk
4. 验证sentinel能够自动切换
4.1 手动停止主库运行,模拟主库宕机
# 查看主库的状态
redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replicationWarning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.1.200,port=16371,state=online,offset=2898,lag=0
slave1:ip=192.168.1.250,port=16372,state=online,offset=2898,lag=0
master_failover_state:no-failover
master_replid:466362240f16a7414b9236f931c6f97252ee00be
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:2898
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:2898# 查看从库状态
redis-cli -h 192.168.1.200 -p 16371 -a dongdong info replication[root@redis_slave1 ~]# redis-cli -h 192.168.1.200 -p 16371 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.100
master_port:16370
master_link_status:up
master_last_io_seconds_ago:4
master_sync_in_progress:0
slave_read_repl_offset:3066
slave_repl_offset:3066
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:466362240f16a7414b9236f931c6f97252ee00be
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:3066
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:3052redis-cli -h 192.168.1.250 -p 16372 -a dongdong info replication[root@redis_slave2 ~]# redis-cli -h 192.168.1.250 -p 16372 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.100
master_port:16370
master_link_status:up
master_last_io_seconds_ago:5
master_sync_in_progress:0
slave_read_repl_offset:3094
slave_repl_offset:3094
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:466362240f16a7414b9236f931c6f97252ee00be
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:3094
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:43
repl_backlog_histlen:3052# 各节点运行redis进程情况
root@redis_master ~]# ss -npl | grep redis
tcp LISTEN 0 128 192.168.1.100:16370 *:* users:(("redis-server",pid=30552,fd=6))
tcp LISTEN 0 128 192.168.1.100:26370 *:* users:(("redis-sentinel",pid=30569,fd=6))[root@redis_slave1 ~]# ss -npl | grep redis
tcp LISTEN 0 128 192.168.1.200:16371 *:* users:(("redis-server",pid=38879,fd=6))
tcp LISTEN 0 511 192.168.1.200:26370 *:* users:(("redis-sentinel",pid=38908,fd=6))[root@redis_slave2 ~]# ss -npl | grep redis
tcp LISTEN 0 128 192.168.1.250:16372 *:* users:(("redis-server",pid=39290,fd=6))
tcp LISTEN 0 128 192.168.1.250:26370 *:* users:(("redis-sentinel",pid=39310,fd=6))# 一切正常
# 手动模拟主库宕机 再来查看情况
redis-cli -h 192.168.1.100 -p 16370 -a dongdong shutdown[root@redis_master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong shutdown
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.# 再次执行命令
[root@redis_master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong shutdown
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
Could not connect to Redis at 192.168.1.100:16370: Connection refused # 发现连接不上 因为我们把主库宕了
4.2 当16370 实例宕机后,查看集群情况
# 查看集群状态
redis-cli -h 192.168.1.200 -p 16371 -a dongdong info replication [root@redis_master ~]# redis-cli -h 192.168.1.200 -p 16371 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master # 此时的slave1主机变成了master 节点
connected_slaves:1 # slave 也变成了1个
slave0:ip=192.168.1.250,port=16372,state=online,offset=14837,lag=1
master_failover_state:no-failover
master_replid:c6e88908dbe348999f5406625612e76ee4d6ffd1
master_replid2:b23a9a971ad73ed23fb81186529c671e54acbac4
master_repl_offset:14837
second_repl_offset:14231
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:14837# 查看集群状态
redis-cli -h 192.168.1.250 -p 16372 -a dongdong info replication [root@redis_slave2 ~]# redis-cli -h 192.168.1.250 -p 16372 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.200
master_port:16371
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_read_repl_offset:87953
slave_repl_offset:87953
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:c6e88908dbe348999f5406625612e76ee4d6ffd1
master_replid2:b23a9a971ad73ed23fb81186529c671e54acbac4
master_repl_offset:87953
second_repl_offset:14231
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:87953# 现在集群里面的情况就是 一主一从
4.3 恢复16370 实例会成为slaves节点
# 修复之前，16370端口是连接不上的
redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication[root@master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
Could not connect to Redis at 192.168.1.100:16370: Connection refused# 修复之后，之前宕机的主库会自动加入集群并成为slaves节点
# 启动Redis
redis-server /usr/local/redis/conf/16370/redis_16370.conf# 可能需要过了几秒才会显示哦 因为信息还没有同步过来哦
[root@redis_master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.200
master_port:16371
master_link_status:up
master_last_io_seconds_ago:0
master_sync_in_progress:0
slave_read_repl_offset:165354
slave_repl_offset:165354
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:c6e88908dbe348999f5406625612e76ee4d6ffd1
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:165354
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:164602
repl_backlog_histlen:753
5. 手动停掉一个sentinel实例
5.1 将redis_master主机中的sentinel实例给停止掉
# 查看redis进程
[root@redis_master ~]# ps -ef | grep redis
root 30646 30499 0 11:23 pts/1 00:00:06 redis-sentinel 192.168.1.100:26370 [sentinel]
root 30663 1 0 11:42 ? 00:00:01 redis-server 192.168.1.100:16370
root 30672 30499 0 11:50 pts/1 00:00:00 grep --color=auto redis# 杀掉 进程id为30646服务
kill -9 30646# 再次查看redis进程 sentinel 已经被杀掉了
[root@redis_master ~]# ps -ef | grep redis
root 30663 1 0 11:42 ? 00:00:01 redis-server 192.168.1.100:16370
root 30676 30499 0 11:51 pts/1 00:00:00 grep --color=auto redis
5.2 验证主从切换
# 查看各节点状况 此时slave1这台是主库
# 查询从库状态 redis_master主机
redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
[root@redis_master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.200
master_port:16371
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_read_repl_offset:251306
slave_repl_offset:251306
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:c6e88908dbe348999f5406625612e76ee4d6ffd1
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:251306
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:164602
repl_backlog_histlen:86705# 查询从库状态 redis_slave2主机
redis-cli -h 192.168.1.250 -p 16372 -a dongdong info replication
[root@redis_master ~]# redis-cli -h 192.168.1.250 -p 16372 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.200
master_port:16371
master_link_status:up
master_last_io_seconds_ago:0
master_sync_in_progress:0
slave_read_repl_offset:254136
slave_repl_offset:254136
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:c6e88908dbe348999f5406625612e76ee4d6ffd1
master_replid2:b23a9a971ad73ed23fb81186529c671e54acbac4
master_repl_offset:254136
second_repl_offset:14231
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:254136# 查询主库状态
redis-cli -h 192.168.1.200 -p 16371 -a dongdong info replication
[root@redis_master ~]# redis-cli -h 192.168.1.200 -p 16371 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.1.250,port=16372,state=online,offset=261722,lag=0
slave1:ip=192.168.1.100,port=16370,state=online,offset=261736,lag=0
master_failover_state:no-failover
master_replid:c6e88908dbe348999f5406625612e76ee4d6ffd1
master_replid2:b23a9a971ad73ed23fb81186529c671e54acbac4
master_repl_offset:261882
second_repl_offset:14231
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:1
repl_backlog_histlen:261882# 此时干掉主库
redis-cli -h 192.168.1.200 -p 16371 -a dongdong shutdown
[root@redis_slave1 ~]# redis-cli -h 192.168.1.200 -p 16371 -a dongdong shutdown
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# 再次查询
[root@redis_slave1 ~]# redis-cli -h 192.168.1.200 -p 16371 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
Could not connect to Redis at 192.168.1.200:16371: Connection refused# 此时查询集群个节点状态 看看哪个节点成功master 此时集群中只有两个节点 分别是redis_master主机 和 redis_slave2主机
# 先查看redis_master
redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
[root@redis_master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.250
master_port:16372
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_read_repl_offset:56377
slave_repl_offset:56377
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:a375e44a67edd4fb81880032ef927964da6c376f
master_replid2:3288009c32135c1d1df6e8d56ceff7d45e572875
master_repl_offset:56377
second_repl_offset:55465
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:30454
repl_backlog_histlen:25924# 是正常的5.3 恢复Redis 实例
# 查看各节点 redis 服务是否停用 如果停用 则重新启动
ps -ef | grep redis# redis_master
redis-server /usr/local/redis/conf/16370/redis_16370.conf# redis_slave1
redis-server /usr/local/redis/conf/16371/redis_16371.conf# redis_slave2
redis-server /usr/local/redis/conf/16372/redis_16372.conf
6. 手动停掉两个sentinel 实例
6.1 将redis_slave1 主机中的sentinel 实例停止
[root@redis_slave1 ~]# ps -ef | grep redis
root 39196 1 0 13:43 ? 00:00:02 redis-server 192.168.1.200:16371
root 39207 38840 0 13:45 pts/0 00:00:03 redis-sentinel 192.168.1.200:26370 [sentinel]
root 39220 38840 0 13:57 pts/0 00:00:00 grep --color=auto rediskill -9 39207root@redis_slave1 ~]# ps -ef | grep redis
root 39196 1 0 13:43 ? 00:00:02 redis-server 192.168.1.200:16371
root 39224 38840 0 13:59 pts/0 00:00:00 grep --color=auto redis6.2 验证主从切换
# 查询redis_master主机集群状态
[root@redis_master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.200
master_port:16371
master_link_status:up
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_read_repl_offset:140766
slave_repl_offset:140766
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:a375e44a67edd4fb81880032ef927964da6c376f
master_replid2:3288009c32135c1d1df6e8d56ceff7d45e572875
master_repl_offset:140766
second_repl_offset:55465
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:30454
repl_backlog_histlen:110313# 查询redis_slvae1主机集群状态
[root@redis_slave1 ~]# redis-cli -h 192.168.1.200 -p 16371 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:master
connected_slaves:2
slave0:ip=192.168.1.100,port=16370,state=online,offset=143290,lag=0
slave1:ip=192.168.1.250,port=16372,state=online,offset=143290,lag=1
master_failover_state:no-failover
master_replid:a375e44a67edd4fb81880032ef927964da6c376f
master_replid2:3288009c32135c1d1df6e8d56ceff7d45e572875
master_repl_offset:143436
second_repl_offset:55465
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:15
repl_backlog_histlen:143422# 查询redis_slave2主机集群状态
[root@redis_slave2 conf]# redis-cli -h 192.168.1.250 -p 16372 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.200
master_port:16371
master_link_status:down
master_last_io_seconds_ago:-1
master_sync_in_progress:0
slave_read_repl_offset:1
slave_repl_offset:1
master_link_down_since_seconds:-1
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:eb44c8dbaaf01ca3b091a4005ecb563cc467dc76
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:0
second_repl_offset:-1
repl_backlog_active:0
repl_backlog_size:1048576
repl_backlog_first_byte_offset:0
repl_backlog_histlen:0# 停掉redis_slvae1主机的redis 服务 看看是否可以进行主从切换
[root@redis_slave1 ~]# ps -ef | grep redis
root 39196 1 0 13:43 ? 00:00:03 redis-server 192.168.1.200:16371
root 39242 38840 0 14:03 pts/0 00:00:00 grep --color=auto rediskill -9 39196# 再次查看redis_master主机集群状态
[root@redis_master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.200
master_port:16371
master_link_status:down # master 已经是 down 状态 说明没有进行主从切换
master_last_io_seconds_ago:-1
master_sync_in_progress:0
slave_read_repl_offset:154925
slave_repl_offset:154925
master_link_down_since_seconds:49
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:a375e44a67edd4fb81880032ef927964da6c376f
master_replid2:3288009c32135c1d1df6e8d56ceff7d45e572875
master_repl_offset:154925
second_repl_offset:55465
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:30454
repl_backlog_histlen:124472# 再次查询redis_slvae2主机集群状态
[root@redis_slave2 conf]# redis-cli -h 192.168.1.250 -p 16372 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.200
master_port:16371
master_link_status:down # master 已经是 down 状态 说明没有进行主从切换
master_last_io_seconds_ago:-1
master_sync_in_progress:0
slave_read_repl_offset:154925
slave_repl_offset:154925
master_link_down_since_seconds:133
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:a375e44a67edd4fb81880032ef927964da6c376f
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:154925
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:149549
repl_backlog_histlen:5377# 是因为我们再配置文件中指定了 sentinel monitor redis_master 192.168.1.100 16370 2 这个2 表示3个sentinel中最少有2个节点认为master库宕机时，才会真正意义上认为master库宕机。 # 把redis_slvae1主机的redis 服务恢复
redis-server /usr/local/redis/conf/16371/redis_16371.conf# 查看状态
[root@redis_master ~]# redis-cli -h 192.168.1.100 -p 16370 -a dongdong info replication
Warning: Using a password with '-a' or '-u' option on the command line interface may not be safe.
# Replication
role:slave
master_host:192.168.1.200
master_port:16371
master_link_status:up # 恢复redis_slvae1主机的redis后 master服务up了
master_last_io_seconds_ago:1
master_sync_in_progress:0
slave_read_repl_offset:3474
slave_repl_offset:3474
slave_priority:100
slave_read_only:1
replica_announced:1
connected_slaves:0
master_failover_state:no-failover
master_replid:527f1bfc1c67513d0813d0c0fddb07964640d907
master_replid2:0000000000000000000000000000000000000000
master_repl_offset:3474
second_repl_offset:-1
repl_backlog_active:1
repl_backlog_size:1048576
repl_backlog_first_byte_offset:476
repl_backlog_histlen:2999
相关文章：
Redis 哨兵搭建
Redis哨兵(sentinel)搭建 7.2.5 文章目录 一、单节点哨兵1. 环境介绍2. 环境前准备工作3. 安装 Redis 7.2.54. redis 配置修改并且启动4.1 修改配置文件4.2 编写启动脚本 5. 开启主从5.1 开启5.2 主库实例查看主从信息 6. 创建sentinel的配置文件并启动6.1 创建配置文件6.2 启…...
HackTheBox--Knife
Knife 测试过程 1 信息收集 端口扫描 80端口测试 echo "10.129.63.56 knife.htb" | sudo tee -a /etc/hosts网站是纯静态的，无任何交互功能，检查网页源代码也未发现任何可利用的文件。 检查页面请求时，请求与响应内容࿰…...
Linux_实现TCP网络通信
目录 1、实现服务器的逻辑 1.1 socket 1.2 bind 1.3 listen 1.4 accept 1.5 read 1.6 write 1.7 服务器代码 2、实现客户端的逻辑 2.1 connect 2.3 客户端代码 3、实现服务器与客户端的通信 结语 前言： 在Linux下，实现传输层协议为TCP…...
正则表达式与文本三剑客之grep
目录 前言 一、grep命令 二、基础正则表达式常见元字符 2.1、特殊字符 2.2、定位符 2.3、非打印字符 三、元字符操作实例 3.1、查找特定字符 3.2、利用中括号“[]”来查找集合字符 3.3、查找行首“^”与行尾字符“$” 3.4、查找任意一个字符“.”与重复字符“*” 3.…...
微信小程序开发：项目程序代码构成
✨✨ 欢迎大家来访Srlua的博文（づ￣3￣）づ╭❤～✨✨ 🌟🌟 欢迎各位亲爱的读者，感谢你们抽出宝贵的时间来阅读我的文章。 我是Srlua小谢，在这里我会分享我的知识和经验。&am…...
【云原生】Kubernetes微服务Istio：介绍、原理、应用及实战案例
✨✨ 欢迎大家来到景天科技苑✨✨ 🎈🎈 养成好习惯，先赞后看哦~🎈🎈 🏆 作者简介：景天科技苑 🏆《头衔》：大厂架构师，华为云开发者社区专家博主，…...
【Docker】Docker-consul容器服务自动发现与注册
目录 一.Consul概述 1.解决了什么问题 2.什么叫微服务或者注册与发现 3.consul的模式 4.相关命令 二.consul 部署 1.consul服务器部署 2.部署docker容器 3.Nginx负载均衡器 3.1.安装启动nginx 3.2.配置nginx负载均衡 3.3.创建配置consul complate模板文件 3.4.添加…...
Go 1.22 remote error: tls: handshake failure
Golang 1.22 remote error: tls: handshake failure 1.22之前运行下面代码是没有错误 package mainimport ("crypto/tls""fmt""net/http" )func main() {http.DefaultTransport.(*http.Transport).TLSClientConfig &tls.Config{InsecureS…...
迈向通用人工智能：AGI的到来与社会变革展望
正文： 随着科技的飞速发展，通用人工智能（AGI）的来临似乎已不再遥远。近期，多位行业领袖和专家纷纷预测，AGI的到来时间可能比我们想象的要早。在这篇博客中，我们将探讨AGI的发展趋势、潜在影响以…...
大模型额外篇章三：vercel搭建openai中转服务器
文章目录 一、起因和注意1）起因2）注意二、实现方法（原理：透传）1）nginx方案2）node服务3）纯 js 方案4）选择国外的域名服务商（DNS 解析路径缩短，建议方案国外提供 CDN 云服务商结合自建云服务业务做负载均衡）三、实践（vercel部署OpenAI代理服务器）四、测试搭建的Ope…...
使用 jQuery 中的 this 实例
在 jQuery 中，this 关键字用于表示指向当前操作的 DOM 元素。本篇博客将详细介绍如何在 jQuery 中使用 this 实例。 一、选择器中的 this 在选择器中，this 可以方便地指向当前操作的 DOM 元素。例如，当用户点击一个按钮时，我们想…...
下载最新版Anaconda、安装、更换源、配置虚拟环境并在vscode中使用
文章目录 进入官网进入下载页安装更换源配置虚拟环境env安装包requests在vscode中使用虚拟环境 进入官网 https://repo.anaconda.com/ 或进入清华大学下载 https://mirrors.tuna.tsinghua.edu.cn/anaconda/archive/ 进入下载页 安装 更换源 查看已经存在的镜像源 bash cond…...
极狐GitLab Git LFS（大文件存储）如何管理？
GitLab 是一个全球知名的一体化 DevOps 平台，很多人都通过私有化部署 GitLab 来进行源代码托管。极狐GitLab ：https://gitlab.cn/install?channelcontent&utm_sourcecsdn 是 GitLab 在中国的发行版，专门为中国程序员服务。可以一键式部署…...
迭代学习笔记
一、迭代学习定义和分类 1、直观理解 迭代学习一般应用于重复性的场景。比如控制一个单自由度的小车以特定的速度曲线移动到指定位置，整个时间是10s，控制频率是0.01，那么整个控制序列就会有1000个点。这1000个点在10s内依次发出，…...
【安全】系统安全设计规范（DOC完整版）
1.1安全建设原则 1.2 安全管理体系 1.3 安全管理规范 1.4 数据安全保障措施 1.4.1 数据库安全保障 1.4.2 操作系统安全保障 1.4.3 病毒防治 1.5安全保障措施 1.5.1实名认证保障 1.5.2 接口安全保障 1.5.3 加密传输保障 1.5.4终端安全保障 软件资料清单列表部分文档&…...
windows常用命令整理
本文分享一些常用的windows命令。根据功能的不同，大致可分为以下几个方面，一是文件操作命令，二是进程相关命令，三是磁盘相关命令，四是网络相关命令，五是其他命令。 1.文件操作命令 dir：显示当…...
视频处理基础知识1
1、图像基本知识 图像的组成：像素、RGB(每个像素由三个发光二极管组成)、分辨率（横纵向像素的个数乘积） PPI每英寸的像素数 DPI每英寸的点数，有可能一个点有多个像素 PPI>300 就属于视网膜级别，就是很清晰&#…...
Linux退不出vim编辑模式
目录 第一章、问题分析1.1）报错提示 第二章、解决方式 友情提醒： 先看文章目录，大致了解文章知识点结构，点击文章目录可直接跳转到文章指定位置。 第一章、问题分析 1.1）报错提示 报错如下：使用Linux的vi…...
TikTok养号的网络环境及相关代理IP知识
TikTok作为一个流行的短视频分享平台，其用户量非常庞大，很多商家和个人都会使用TikTok来进行引流和推广。由于TikTok的规则和政策限制了每个用户每天发布视频的数量，因此许多用户会使用多个账号来发布更多的视频以提高曝光率。 然而ÿ…...
过程调用和数组的分配访问
系列文章 : 深入理解计算机系统笔记 文章目录 系列文章3.7 过程3.7.1 运行时栈3.7.2 转移控制3.7.3 数据传送3.7.4 栈上的局部存储3.7.5 寄存器中的局部存储空间3.7.6 递归过程 3.8 数组分配和访问3.8.1 基本原则3.8.2 指针运算3.8.3 嵌套的数组3.8.4 定长数组3.8.5 变长数组…...
sqlserver 根据指定字符 解析拼接字符串
DECLARE LotNo NVARCHAR(50)A,B,C DECLARE xml XML ( SELECT <x> REPLACE(LotNo, ,, </x><x>) </x> ) DECLARE ErrorCode NVARCHAR(50) -- 提取 XML 中的值 SELECT value x.value(., VARCHAR(MAX))…...
是否存在路径（FIFOBB算法）
题目描述 一个具有 n 个顶点e条边的无向图，该图顶点的编号依次为0到n-1且不存在顶点与自身相连的边。请使用FIFOBB算法编写程序，确定是否存在从顶点 source到顶点 destination的路径。 输入 第一行两个整数，分别表示n 和 e 的值（1…...
Spring Cloud Gateway 中自定义验证码接口返回 404 的排查与解决
Spring Cloud Gateway 中自定义验证码接口返回 404 的排查与解决 问题背景 在一个基于 Spring Cloud Gateway WebFlux 构建的微服务项目中，新增了一个本地验证码接口 /code，使用函数式路由（RouterFunction）和 Hutool 的 Circle…...
MySQL账号权限管理指南：安全创建账户与精细授权技巧
在MySQL数据库管理中，合理创建用户账号并分配精确权限是保障数据安全的核心环节。直接使用root账号进行所有操作不仅危险且难以审计操作行为。今天我们来全面解析MySQL账号创建与权限分配的专业方法。 一、为何需要创建独立账号？ 最小权限原则…...
2025季度云服务器排行榜
在全球云服务器市场，各厂商的排名和地位并非一成不变，而是由其独特的优势、战略布局和市场适应性共同决定的。以下是根据2025年市场趋势，对主要云服务器厂商在排行榜中占据重要位置的原因和优势进行深度分析： 一、全球“三巨头”…...
智能AI电话机器人系统的识别能力现状与发展水平
一、引言 随着人工智能技术的飞速发展，AI电话机器人系统已经从简单的自动应答工具演变为具备复杂交互能力的智能助手。这类系统结合了语音识别、自然语言处理、情感计算和机器学习等多项前沿技术，在客户服务、营销推广、信息查询等领域发挥着越来越重要…...
面向无人机海岸带生态系统监测的语义分割基准数据集
描述：海岸带生态系统的监测是维护生态平衡和可持续发展的重要任务。语义分割技术在遥感影像中的应用为海岸带生态系统的精准监测提供了有效手段。然而，目前该领域仍面临一个挑战，即缺乏公开的专门面向海岸带生态系统的语义分割基准数据集。受…...
怎么让Comfyui导出的图像不包含工作流信息，
为了数据安全，让Comfyui导出的图像不包含工作流信息，导出的图像就不会拖到comfyui中加载出来工作流。 ComfyUI的目录下node.py 直接移除 pnginfo（推荐） 在 save_images 方法中，删除或注释掉所有与 metadata …...
Qemu arm操作系统开发环境
使用qemu虚拟arm硬件比较合适。 步骤如下： 安装qemu apt install qemu-system安装aarch64-none-elf-gcc 需要手动下载，下载地址：https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel/arm-gnu-toolchain-13.2.rel1-x…...
深入浅出Diffusion模型：从原理到实践的全方位教程
I. 引言：生成式AI的黎明 – Diffusion模型是什么？ 近年来，生成式人工智能（Generative AI）领域取得了爆炸性的进展，模型能够根据简单的文本提示创作出逼真的图像、连贯的文本，乃至更多令人惊叹的…...