Prometheus实战篇:Prometheus监控redis

version: '3'
services:
   redis:
  image:redis:5
  container_name: redis
  command: redis-server --requirepass 123456 --maxmemory 512mb
   restart: always
   volumes:
    - /data/redis/data: /data
   port:
   - "6379:6379"

docker-compose up -d

docker run -d --name redis_exporter -p 9121:9121 oliver006/redis_exporter --redis.addr redis://localhost:6379 --redis.password '123456'

cat >docker-compose.yaml <<FOF
version: '3.3'
services:
 redis_exproter:
  image:oliver006/redis-exporter
  container_name: redis_exporter
  restart: always
  environment:
    REDIS_ADDR:"localhost:6379"
    REDIS_PASSWORD: 123456
  port:
   - "9113:9113"
EOF

docker-compose up -d

查看正在运行的容器
docker ps
或者:
查看redis_exporter容器的运行日志
docker logs -f redis_exporter

cd /data/docker-prometheus
# 在scrapc_configs(搜刮配置):下面增加如下配置:
cat >prometheus/prometheus.yml <<FOF
 - job_name: 'redis_exporter'
   static_configs:
   - targets: ['localhost:9121']
     labels:
      instance: test服务器 
EOF

curl -x POST http://localhost:9090/-/reload

redis_up                        服务器是否在线
redis_uptime_in_seconds                 运行时长,单位s
rate(redis_cpu_sys_seconds_total[1m])+rate(redis_cpu_user_seconds_total[1m])    占用CPU核数
redis_memory_used_bytes                 占用内存量
redis_memory_max_bytes                  限制的最大内存,如果没限制则为0
delta(redis_net_input_bytes_total[1m])          网络接受的bytes
delta(redis_net_output_bytes_total[1m])         网络发送的bytes
redis_connected_clients                 客户端连接数
redis_connected_clients / redis_config_maxclients
  连接数使用率
redis_rejected_connections_total
  拒绝的客户端连接数
redis_connected_slaves
  slave连接数

rule_files:
  - "alert.yml"
  - "rules/*.yml"

cat >prometheus/redis.yml <<FOF
groups:
- name: redis
  rules:
    - alert: RedisDown
      expr: redis_up ==0
      for: 0m
      labels:
        severity: critical
      annotations:
          summary: "redis Down,实例:{{$labels.instance }}"
          description: "Redis实例 is down"
    - alert: RedisMissingBackup
      expr: time() - redis_rdb_last_save_timestamp_seconds > 60 * 60 * 24
      for: 0m
      labels:
        severity: critical
      annotations:
          summary: "redis 备份丢失,实例:{{$labels.instance }}"
          description: "Redis 24小时未备份"
    - alert: RedisOutOfConfigredMaxmemory
      expr: redis_memory_used_bytes / redis_memory_max_bytes * 100 >90
      for: 2m
      labels:
        severity: warning
      annotations:
          summary: "redis超出配置的最大内存,实例:{{$labels.instance }}"
          description: "Redis内存使用超过配置的最大内存的90%"
    - alert: RedisTooManyConnections
      expr: redis_connected_clients > 100
      for: 2m
      labels:
        severity: warning
      annotations:
          summary: "redis连接数过多,实例:{{$labels.instance }}"
          description: "Redis当前连接数为:{{ $value }}"
    - alert: RedisNotEnoughConnections
      expr: redis_connected_clients < 1
      for: 2m
      labels:
        severity: warning
      annotations:
          summary: "redis没有足够的连接,实例:{{$labels.instance }}"
          description: "Redis当前连接数为:{{ $value }}"
    - alert: RedisRejectedConnections
      expr: increase(redis_rejected_connections_total[1m]) > 0
      for: 0m
      labels:
        severity: critical
      annotations:
          summary: "redis有拒绝连接,实例:{{$labels.instance }}"
          description: "与Redis的某些连接被拒绝:{{ $value }}"
EOF

docker exec -it prometheus promtool check config /etc/prometheus/prometheus.yml

curl -x POST http://localhost:9090/-/reload