一、软件及系统信息

redis：redis-6.2.6

redis_exporter：redis_exporter-v1.50.0.linux-amd64.tar.gz

# cat /etc/anolis-release 
Anolis OS release 8.9

granfa; 7.5.3

二、下载地址

https://github.com/oliver006/redis_exporter/releases?page=3
https://github.com/oliver006/redis_exporter/releases/download/v1.50.0/redis_exporter-v1.50.0.linux-amd64.tar.gz

三、安装

# tar -zxf redis_exporter-v1.50.0.linux-amd64.tar.gz

# cat /usr/lib/systemd/system/redis_exporter.service
[Unit]
Description=node_exporter
Documentation=https://prometheus.io/
After=network.target
[Service]
Type=simple
User=monitor
ExecStart=/opt/softs/redis_exporter-v1.50.0.linux-amd64/redis_exporter \
--redis.addr=redis://192.168.8.147:6379 \
--redis.password=ge********z!e68 \
--web.listen-address=0.0.0.0:9121
Restart=on-failure
[Install]
WantedBy=multi-user.target


# useradd -r -s /usr/sbin/nologin monitor
-r：创建系统账户，通常用于运行服务。
-s /usr/sbin/nologin：指定用户的登录 Shell 为 /usr/sbin/nologin，这是一个特殊的 Shell，不允许交互式登录

# chown monitor:monitor /usr/lib/systemd/system/redis_exporter.service
# chown monitor:monitor /opt/softs/redis_exporter-v1.50.0.linux-amd64/redis_exporter
# chmod +x /usr/lib/systemd/system/redis_exporter.service
# systemctl daemon-reload
# systemctl start redis_exporter.service 


# firewall-cmd --zone=public --add-port=9121/tcp --permanent
# firewall-cmd --reload

四、prometheus配置

# vi /usr/local/prometheus/prometheus.yml
- job_name: 'redis'
    static_configs:
      - targets: ["192.168.8.146:9121"]
        labels:
          env: 'prod'
          group: 'redis-cluster'
          role: 'master'
      - targets: ["192.168.8.147:9121"]
        labels:
          env: 'prod'
          role: 'slave'
    metrics_path: /metrics



# /usr/local/prometheus/promtool check config /usr/local/prometheus/prometheus.yml
# curl -XPOST 127.0.0.1:9090/-/reload

五、测试

六、看板下载：

https://grafana.com/grafana/dashboards/

Grafana dashboards | Grafana Labs

搜索模板: redis_exporter for redis

七、告警配置

# cat redis-exporter-alert-rules.yml
- alert: RedisReplicationBroken 
  expr: redis_master_link_up{role="slave"} == 0 
  for: 2m  # 持续2分钟断开触发 
  labels:
    severity: critical 
    env: "{{ $labels.env  }}"
  annotations:
    summary: "Redis 主从复制中断 (实例: {{ $labels.instance  }})"
    description: "从节点 {{ $labels.instance  }} 超过2分钟未连接到主节点，请检查网络或主节点状态。"
	
	
	
- alert: RedisTooManyConnections 
  expr: redis_connected_clients > 1000  # 根据业务规模调整 
  for: 5m 
  labels:
    severity: warning 
  annotations:
    summary: "Redis 客户端连接数激增"
    description: "实例 {{ $labels.instance  }} 当前连接数 {{ $value }}，可能遭受攻击或配置不合理。"
	
	
- alert: RedisBlockedClients 
  expr: redis_blocked_clients > 0  # 存在阻塞命令（如 BLPOP）
  for: 1m 
  labels:
    severity: warning 
  annotations:
    summary: "Redis 阻塞客户端存在"
    description: "实例 {{ $labels.instance  }} 有 {{ $value }} 个客户端被阻塞，检查慢查询或大键操作。"
	
- alert: RedisKeyspaceHitRateLow 
  expr: (rate(redis_keyspace_hits_total[5m]) / (rate(redis_keyspace_hits_total[5m]) + rate(redis_keyspace_misses_total[5m]))) < 0.5  # 命中率<50%
  for: 30m 
  labels:
    severity: warning 
  annotations:
    summary: "Redis 缓存命中率过低"
    description: "实例 {{ $labels.instance  }} 缓存命中率仅 {{ printf \"%.1f\" ($value*100) }}%，需优化缓存策略或扩容。"