Redis调用次数实时监控(redis调用次数监控)
Redis调用次数实时监控
在分布式系统中,Redis是常用的内存型NoSQL数据库,它提供了高速的键值存储和读取操作,同时支持多种数据结构,并且具有良好的跨语言支持。然而,随着Redis使用场景的增多,其对应用的性能和可靠性要求越来越高,而如何有效地监控和调整Redis的使用情况成为了一个重要的问题。
本文提出了一种基于Redis Sentinel和Prometheus的方案,可以实时监控Redis调用的次数和平均响应时间,并支持告警和数据可视化。具体实现方式如下:
1. 在Redis Sentinel的配置文件中增加如下代码,用于统计各个Redis实例的调用次数和响应时间:
# enable stats
stats-interval 10stats-detled-stats yes
stats-prefix "redis"
这个配置项中,stats-interval表示统计间隔,stats-detled-stats表示统计详细信息(包括调用次数,响应时间等),stats-prefix表示统计结果的前缀。我们可以根据需要自定义这些参数。
2. 在Prometheus的配置文件中增加如下代码,用于抓取Redis Sentinel的统计信息:
- job_name: 'redis-sentinel'
scrape_interval: 10s static_configs:
- targets: ['172.16.0.100:26379', '172.16.0.101:26379', '172.16.0.102:26379'] labels:
instance: 'redis-sentinel'
这个配置项中,job_name表示抓取的任务名称,scrape_interval表示抓取间隔,static_configs表示静态配置,targets表示监控对象(主机IP和端口),labels表示标签。我们可以根据需要自定义这些参数。
3. 在Prometheus的配置文件中增加如下代码,用于对Redis Sentinel的统计信息进行处理和展示:
- job_name: 'redis'
scrape_interval: 10s static_configs:
- targets: ['172.16.0.100:6379', '172.16.0.101:6379', '172.16.0.102:6379'] labels:
instance: 'redis' relabel_configs:
- source_labels: [__address__] regex: '.*:6379$'
target_label: instance - source_labels: [instance]
target_label: __metrics_path__ replacement: '/redis/metrics'
这个配置项中,job_name和scrape_interval同上,targets和labels也同上,relabel_configs表示重命名配置。其中,第一个relabel配置是将原始的__address__标签重命名为instance标签,第二个relabel配置是将instance标签作为__metrics_path__标签的值,并将其替换为/redis/metrics。这个操作是为了避免出现两个Redis实例的__metrics_path__标签重复的情况。我们可以根据需要自定义这些参数。
4. 在Grafana中创建一个Dashboard,用于展示Redis Sentinel和Redis的统计信息。这里只展示Redis部分的代码:
{
"annotations": { "list": [
{ "builtIn": 1,
"datasource": "-- Grafana --", "enable": true,
"hide": true, "iconColor": "rgba(0, 211, 255, 1)",
"name": "Annotations & Alerts", "target": {
"limit": 100, "matchAny": true,
"tags": [] },
"type": "dashboard" }
] },
"editable": true, "gnetId": null,
"graphTooltip": 0, "id": null,
"iteration": 1611368303189, "links": [],
"panels": [ {
"aliasColors": {}, "bars": false,
"dashLength": 10, "dashes": false,
"datasource": "prometheus", "fill": 1,
"fillGradient": 0, "gridPos": {},
"hideTimeOverrides": false, "id": 24,
"legend": { "avg": true,
"current": false, "max": true,
"min": true, "show": true,
"total": false, "values": false
}, "lines": true,
"linewidth": 1, "nullPointMode": "null",
"options": {}, "percentage": false,
"pluginVersion": "7.5.7", "pointradius": 5,
"points": false, "renderer": "flot",
"seriesOverrides": [], "spaceLength": 10,
"stack": false, "steppedLine": false,
"targets": [ {
"expr": "redis_cmdstat_get_keys_total{instance=~\"" + instance + "\"}", "format": "time_series",
"interval": "", "intervalFactor": 1,
"legendFormat": "{{cmd}}", "metric": "",
"refId": "A", "step": ""
}, {
"expr": "redis_cmdstat_get_keys_duration_seconds_total{instance=~\"" + instance + "\"}", "format": "time_series",
"interval": "", "intervalFactor": 1,
"legendFormat": "{{cmd}}", "metric": "",
"refId": "B", "step": ""
} ],
"thresholds": [], "timeFrom": null,
"timeShift": null, "title": "Redis cmdstat",
"tooltip": { "shared": true,
"sort": 0, "value_type": "cumulative"
}, "type": "graph",
"xaxis": { "mode": "time",
"name": null, "show": true,
"values": [] },
"yaxes": [ {
"format": "short", "label": null,
"logBase": 1, "max": null,
"min": null, "show": true
}, {
"format": "short", "label": null,
"logBase": 1, "max": null,
"min": null, "show": true
} ]
} ],
"schemaVersion": 22, "style": "dark",
"tags": [], "templating": {
"list": [ {
"allValue": null, "auto": true,
"current": {}, "datasource": "prometheus",
"description": null, "error": null,
"hide": 0, "includeAll": true,
"label": "Instance", "multi": true,
"name": "instance", "options": [],
"query": "label_values(redis_up_by_instance{app=\"redis\"}, instance)", "refresh": 1,
"regex": "", "skipUrlSync": false,
"sort": 1, "tagValuesQuery": "",
"tags": [], "type": "query",
"useTags": false }
] },
"time": { "from": "now-6h",
"to": "now" },
"timepicker": { "hidden": false,
"nowButton": false, "refresh_intervals": [
"5s", "10s",
"30s", "1m",
"5m", "15m",
"30m", "1h",
"2h", "1d"
], "time_options": [
"5m", "15m",
"1h", "6h",
"12h", "24h",
"2d", "7d",
"30d" ]
}, "timezone": "",
"title": "Redis", "uid": "KjGtJNEMk",
"version": 1}
这个代码是一个Grafana的Dashboard定义,用于展示Redis Sentinel和Redis的统计信息。其中,模板变量instance表示Redis的实例名称,可以在展示时动态选择。targets中的表达式可以根据需要调整。
5. 对Grafana中的Redis Panel进行设置和保存,即可实现Redis调用次数和响应时间的实时监控。
总结
本文介绍了一种基于Redis Sentinel和Prometheus的方案,可以实现Redis