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Alibaba Cloud Service Mesh:サーキットブレーカーとレート制限のための Grafana の設定

最終更新日:Jun 21, 2026

Service Mesh (ASM) は、非侵襲的なサーキットブレーキング、スロットリング、トラフィックモニタリングに対応しています。このトピックでは、サーキットブレーキングとスロットリングに関する一般的なダッシュボード構成とアラートルールについて説明します。

サーキットブレーカー

サーキットブレーカーは、急なトラフィックスパイクによるシステムのクラッシュを防ぐための過負荷保護メカニズムです。クラウドネイティブサービス間の East-West トラフィックを持つアーキテクチャでは、応答の遅延や高いエラーレートといった単一サービスの障害が、呼び出しチェーン全体にわたるカスケード障害を引き起こす可能性があります。

サービス間の East-West トラフィックに対してサーキットブレーカールールを設定することで、リクエストの失敗レートまたは応答タイムアウトの数がしきい値に達したときに、アップストリームサービスからのリクエストを自動的に拒否できます。このアプローチにより、アップストリームサービスを保護し、呼び出しチェーン全体への障害の波及を防ぎます。

サーキットブレーカールールを設定すると、各 ASM プロキシは、プロキシするリクエストに基づいて、リクエストの失敗レートまたは応答タイムアウトの数を独立して計算します。したがって、同じ障害が発生しているアップストリームサービスに対して、クライアント側の異なる ASM プロキシがわずかに異なるタイミングでサーキットブレーカーをトリガーする可能性があります。

ダッシュボードの例

image

次の表に各パネルの説明を示します:

パネル

説明

Requests

リクエストの概要を提供します。これには次のメトリックが含まれます:

  • 総リクエスト数 (total_requests)。これは、Requests total パネルに対応します。

  • スロットリングされたリクエスト (throttled_requests)。これは、Requests throttled パネルに対応します。

  • 成功したリクエスト (ok_requests)。これは、Requests OK パネルに対応します。

Requests OK percent

総リクエスト数に対する成功したリクエストの割合。

Requests throttled percent

総リクエスト数に対するスロットリングされたリクエストの割合。

次の JSON を Grafana にインポートして、お使いのクラスター用のサーキットブレーカーダッシュボードを作成できます。また、この JSON を変更したり、テンプレートとして使用して独自のダッシュボードを作成することもできます。

JSON コンテンツ

{
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": {
          "type": "grafana",
          "uid": "-- Grafana --"
        },
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "fiscalYearStartMonth": 0,
  "graphTooltip": 0,
  "id": 168,
  "links": [],
  "liveNow": false,
  "panels": [
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "palette-classic"
          },
          "custom": {
            "axisCenteredZero": false,
            "axisColorMode": "text",
            "axisLabel": "",
            "axisPlacement": "auto",
            "barAlignment": 0,
            "drawStyle": "line",
            "fillOpacity": 0,
            "gradientMode": "none",
            "hideFrom": {
              "legend": false,
              "tooltip": false,
              "viz": false
            },
            "lineInterpolation": "linear",
            "lineWidth": 1,
            "pointSize": 5,
            "scaleDistribution": {
              "type": "linear"
            },
            "showPoints": "auto",
            "stacking": {
              "group": "A",
              "mode": "none"
            }
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": [
          {
            "matcher": {
              "id": "byName",
              "options": "total_requests"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "blue",
                  "mode": "fixed"
                }
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "ok_requests"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "dark-green",
                  "mode": "fixed"
                }
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "throttled_requests"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "dark-red",
                  "mode": "fixed"
                }
              }
            ]
          }
        ]
      },
      "gridPos": {
        "h": 8,
        "w": 12,
        "x": 0,
        "y": 0
      },
      "id": 1,
      "options": {
        "legend": {
          "calcs": [],
          "displayMode": "list",
          "placement": "bottom",
          "showLegend": true
        },
        "tooltip": {
          "mode": "single",
          "sort": "none",
          "targets": []
        }
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": false,
          "expr": "sum(rate(istio_requests_total{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[60s])) * 30",
          "format": "time_series",
          "instant": false,
          "legendFormat": "total_requests",
          "range": true,
          "refId": "A"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": false,
          "expr": "sum(rate(istio_requests_total{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[60s])) * 30 - sum(rate(envoy_asm_circuit_breaker_total_broken_requests{namespace=~\"$namespace\",pod_name=~\"$pod\",cluster=~\".*$service.*\"}[60s])) * 30",
          "format": "time_series",
          "hide": false,
          "instant": false,
          "legendFormat": "ok_requests",
          "range": true,
          "refId": "B"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(rate(envoy_asm_circuit_breaker_total_broken_requests{namespace=~\"$namespace\",pod_name=~\"$pod\",cluster=~\".*$service.*\"}[60s])) * 30",
          "hide": false,
          "instant": false,
          "legendFormat": "throttled_requests",
          "range": true,
          "refId": "C"
        }
      ],
      "title": "Requests",
      "transparent": true,
      "type": "aliyun-timeseries-panel"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 4,
        "x": 0,
        "y": 8
      },
      "id": 2,
      "options": {
        "colorMode": "value",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(istio_requests_total{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[$__range]))",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests Total",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 4,
        "x": 4,
        "y": 8
      },
      "id": 5,
      "options": {
        "colorMode": "value",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(istio_requests_total{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[$__range])) - sum(increase(envoy_asm_circuit_breaker_total_broken_requests{namespace=~\"$namespace\",pod_name=~\"$pod\",cluster=~\".*$service.*\"}[$__range]))",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests OK",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 4,
        "x": 8,
        "y": 8
      },
      "id": 4,
      "options": {
        "colorMode": "value",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_asm_circuit_breaker_total_broken_requests{namespace=~\"$namespace\",pod_name=~\"$pod\",cluster=~\".*$service.*\"}[$__range]))",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests Throttled",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "custom": {
            "neutral": -1
          },
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "red",
                "value": null
              },
              {
                "color": "green",
                "value": 90
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 7,
        "w": 6,
        "x": 0,
        "y": 16
      },
      "id": 6,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "(sum(increase(istio_requests_total{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[$__range])) - sum(increase(envoy_asm_circuit_breaker_total_broken_requests{namespace=~\"$namespace\",pod_name=~\"$pod\",cluster=~\".*$service.*\"}[$__range]))) / sum(increase(istio_requests_total{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[$__range])) * 100",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests OK Percent",
      "type": "gauge"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "custom": {
            "neutral": -1
          },
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 10
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 7,
        "w": 6,
        "x": 6,
        "y": 16
      },
      "id": 7,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_asm_circuit_breaker_total_broken_requests{namespace=~\"$namespace\",pod_name=~\"$pod\",cluster=~\".*$service.*\"}[$__range])) / sum(increase(istio_requests_total{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[$__range])) * 100",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests Throttled Percent",
      "type": "gauge"
    }
  ],
  "refresh": false,
  "schemaVersion": 38,
  "style": "dark",
  "tags": [],
  "templating": {
    "list": [
      {
        "current": {
          "selected": false,
          "text": "datesource",
          "value": "datesource"
        },
        "hide": 0,
        "includeAll": false,
        "label": "datasource",
        "multi": false,
        "name": "DS_PROMETHEUS",
        "options": [],
        "query": "prometheus",
        "queryValue": "datesource",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "type": "datasource"
      },
      {
        "allValue": ".*",
        "current": {
          "selected": false,
          "text": "All",
          "value": "$__all"
        },
        "datasource": {
          "type": "prometheus",
          "uid": "ykIxRIhNk"
        },
        "definition": "query_result(sum(envoy_asm_circuit_breaker_total_broken_requests) by (namespace))",
        "hide": 0,
        "includeAll": true,
        "label": "namespace",
        "multi": false,
        "name": "namespace",
        "options": [],
        "query": {
          "query": "query_result(sum(envoy_asm_circuit_breaker_total_broken_requests) by (namespace))",
          "refId": "PrometheusVariableQueryEditor-VariableQuery"
        },
        "refresh": 1,
        "regex": "/.*namespace=\"(.*)\".*/",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
      },
      {
        "allValue": ".*",
        "current": {
          "selected": false,
          "text": "All",
          "value": "$__all"
        },
        "datasource": {
          "type": "prometheus",
          "uid": "ykIxRIhNk"
        },
        "definition": "query_result(sum(envoy_asm_circuit_breaker_total_broken_requests) by (pod_name))",
        "description": "",
        "hide": 0,
        "includeAll": true,
        "label": "pod",
        "multi": false,
        "name": "pod",
        "options": [],
        "query": {
          "query": "query_result(sum(envoy_asm_circuit_breaker_total_broken_requests) by (pod_name))",
          "refId": "PrometheusVariableQueryEditor-VariableQuery"
        },
        "refresh": 1,
        "regex": "/.*pod_name=\"(.*)\".*/",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
      },
      {
        "allValue": ".*",
        "current": {
          "selected": false,
          "text": "All",
          "value": "$__all"
        },
        "datasource": {
          "type": "prometheus",
          "uid": "ykIxRIhNk"
        },
        "definition": "query_result(sum(envoy_asm_circuit_breaker_total_broken_requests) by (cluster))",
        "hide": 0,
        "includeAll": true,
        "multi": false,
        "name": "service",
        "options": [],
        "query": {
          "query": "query_result(sum(envoy_asm_circuit_breaker_total_broken_requests) by (cluster))",
          "refId": "PrometheusVariableQueryEditor-VariableQuery"
        },
        "refresh": 1,
        "regex": "/.*\\|.*\\|.*\\|(.*)/",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
      }
    ]
  },
  "time": {
    "from": "2025-03-19T07:40:00.388Z",
    "to": "2025-03-19T07:43:09.493Z"
  },
  "timepicker": {},
  "timezone": "browser",
  "title": "Circuit Breaker",
  "uid": "5d5bcd97-33a9-499f-94f6-aea7081b9777",
  "version": 5,
  "weekStart": ""
}

アラートルールの例

設定

説明

カスタム PromQL 式

(sum by(cluster, namespace) (increase(envoy_asm_circuit_breaker_total_broken_requests[1m]))) > 10

クラスターと名前空間でグループ化し、過去 1 分間のスロットリングされたリクエスト数を計算します。カウントが 10 を超えると、アラートがトリガーされます。

アラート内容

サービスレベルのサーキットブレーカーが発生しました!名前空間:{{$labels.namespace}}、ターゲットサービス:{{$labels.cluster}}。過去 1 分間のスロットリングされたリクエスト数:{{ $value }}

アラートメッセージの形式を定義します。メッセージには、名前空間、ターゲットサービス、および過去 1 分間のスロットリングされたリクエスト数が含まれます。

グローバルスロットリング

Envoy プロキシでは、グローバルスロットリングはサービスメッシュ全体のリクエストレートを制御するメカニズムです。Envoy のレートリミットサービスを利用して、トラフィックを一元的に処理し、定義済みのルールとクォータに基づいて制限を適用します。

グローバルスロットリングは、ローカルスロットリングと組み合わせて、階層的な保護を提供できます。

ダッシュボードの例

image

次の表に各パネルの説明を示します。

パネル

説明

Requests

リクエストの概要を提供します。これには次のメトリックが含まれます。

  • 総リクエスト数 (total_requests)。[Requests Total] パネルに対応します。

  • 上限に達したリクエスト (limited_requests)。[Requests Reached Limits] パネルに対応します。

  • 許可されたリクエスト (unlimited_requests)。[Requests OK] パネルに対応します。

Requests OK Percent

「リクエスト OK」の割合。

Requests Reached Limits Percent

「上限に達したリクエスト」の割合。

次の JSON を Grafana ダッシュボードにインポートして、クラスター用のグローバルスロットリングダッシュボードを作成できます。 また、この JSON を変更したり、これをもとに独自のダッシュボードを作成したりすることもできます。

ダッシュボード JSON

{
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": {
          "type": "grafana",
          "uid": "-- Grafana --"
        },
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "fiscalYearStartMonth": 0,
  "graphTooltip": 0,
  "id": 166,
  "links": [],
  "liveNow": false,
  "panels": [
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "palette-classic"
          },
          "custom": {
            "axisCenteredZero": false,
            "axisColorMode": "text",
            "axisLabel": "",
            "axisPlacement": "auto",
            "barAlignment": 0,
            "drawStyle": "line",
            "fillOpacity": 0,
            "gradientMode": "none",
            "hideFrom": {
              "legend": false,
              "tooltip": false,
              "viz": false
            },
            "lineInterpolation": "linear",
            "lineWidth": 1,
            "pointSize": 5,
            "scaleDistribution": {
              "type": "linear"
            },
            "showPoints": "auto",
            "stacking": {
              "group": "A",
              "mode": "none"
            }
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": [
          {
            "matcher": {
              "id": "byName",
              "options": "total_requests"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "blue",
                  "mode": "fixed"
                }
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "unlimited_requests"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "dark-green",
                  "mode": "fixed"
                }
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "limited_requests"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "dark-red",
                  "mode": "fixed"
                }
              }
            ]
          }
        ]
      },
      "gridPos": {
        "h": 8,
        "w": 12,
        "x": 0,
        "y": 0
      },
      "id": 1,
      "options": {
        "legend": {
          "calcs": [],
          "displayMode": "list",
          "placement": "bottom",
          "showLegend": true
        },
        "tooltip": {
          "mode": "single",
          "sort": "none",
          "targets": []
        }
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": false,
          "expr": "sum(rate(envoy_cluster_ratelimit_ok{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[60s])) * 30 + sum(rate(envoy_cluster_ratelimit_over_limit{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[60s])) * 30",
          "format": "time_series",
          "instant": false,
          "legendFormat": "total_requests",
          "range": true,
          "refId": "A"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": false,
          "expr": "sum(rate(envoy_cluster_ratelimit_ok{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[60s])) * 30",
          "format": "time_series",
          "hide": false,
          "instant": false,
          "legendFormat": "unlimited_requests",
          "range": true,
          "refId": "B"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(rate(envoy_cluster_ratelimit_over_limit{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[60s])) * 30",
          "hide": false,
          "instant": false,
          "legendFormat": "limited_requests",
          "range": true,
          "refId": "C"
        }
      ],
      "title": "Requests",
      "transparent": true,
      "type": "aliyun-timeseries-panel"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 4,
        "x": 0,
        "y": 8
      },
      "id": 2,
      "options": {
        "colorMode": "value",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_cluster_ratelimit_ok{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range])) + sum(increase(envoy_cluster_ratelimit_over_limit{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range]))",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests Total",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 4,
        "x": 4,
        "y": 8
      },
      "id": 5,
      "options": {
        "colorMode": "value",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_cluster_ratelimit_ok{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range]))",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests OK",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 4,
        "x": 8,
        "y": 8
      },
      "id": 4,
      "options": {
        "colorMode": "value",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_cluster_ratelimit_over_limit{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range]))",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests Reached Limits",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "custom": {
            "neutral": -1
          },
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "red",
                "value": null
              },
              {
                "color": "green",
                "value": 90
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 7,
        "w": 6,
        "x": 0,
        "y": 16
      },
      "id": 6,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_cluster_ratelimit_ok{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range])) / (sum(increase(envoy_cluster_ratelimit_ok{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range])) + sum(increase(envoy_cluster_ratelimit_over_limit{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range]))) * 100",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests OK Percent",
      "type": "gauge"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "custom": {
            "neutral": -1
          },
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 10
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 7,
        "w": 6,
        "x": 6,
        "y": 16
      },
      "id": 7,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_cluster_ratelimit_over_limit{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range])) / (sum(increase(envoy_cluster_ratelimit_ok{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range])) + sum(increase(envoy_cluster_ratelimit_over_limit{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range]))) * 100",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests Reached Limits Percent",
      "type": "gauge"
    }
  ],
  "refresh": "",
  "schemaVersion": 38,
  "style": "dark",
  "tags": [],
  "templating": {
    "list": [
      {
        "current": {
          "selected": false,
          "text": "datasource",
          "value": "datasource"
        },
        "hide": 0,
        "includeAll": false,
        "label": "datasource",
        "multi": false,
        "name": "DS_PROMETHEUS",
        "options": [],
        "query": "prometheus",
        "queryValue": "datasource",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "type": "datasource"
      },
      {
        "allValue": ".*",
        "current": {
          "selected": false,
          "text": "All",
          "value": "$__all"
        },
        "datasource": {
          "type": "prometheus",
          "uid": "ykIxRIhNk"
        },
        "definition": "query_result(sum(envoy_cluster_ratelimit_over_limit) by (namespace) or sum(envoy_cluster_ratelimit_ok) by (namespace))",
        "hide": 0,
        "includeAll": true,
        "label": "namespace",
        "multi": false,
        "name": "namespace",
        "options": [],
        "query": {
          "query": "query_result(sum(envoy_cluster_ratelimit_over_limit) by (namespace) or sum(envoy_cluster_ratelimit_ok) by (namespace))",
          "refId": "PrometheusVariableQueryEditor-VariableQuery"
        },
        "refresh": 1,
        "regex": "/.*namespace=\"(.*)\".*/",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
      },
      {
        "allValue": ".*",
        "current": {
          "selected": false,
          "text": "All",
          "value": "$__all"
        },
        "datasource": {
          "type": "prometheus",
          "uid": "ykIxRIhNk"
        },
        "definition": "query_result(sum(envoy_cluster_ratelimit_over_limit) by (pod_name) or sum(envoy_cluster_ratelimit_ok) by (pod_name))",
        "description": "",
        "hide": 0,
        "includeAll": true,
        "label": "pod",
        "multi": false,
        "name": "pod",
        "options": [],
        "query": {
          "query": "query_result(sum(envoy_cluster_ratelimit_over_limit) by (pod_name) or sum(envoy_cluster_ratelimit_ok) by (pod_name))",
          "refId": "PrometheusVariableQueryEditor-VariableQuery"
        },
        "refresh": 1,
        "regex": "/.*pod_name=\"(.*)\".*/",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
      },
      {
        "allValue": ".*",
        "current": {
          "selected": false,
          "text": "All",
          "value": "$__all"
        },
        "datasource": {
          "type": "prometheus",
          "uid": "ykIxRIhNk"
        },
        "definition": "query_result(sum(envoy_cluster_ratelimit_over_limit) by (service_istio_io_canonical_name) or sum(envoy_cluster_ratelimit_ok) by (service_istio_io_canonical_name))",
        "hide": 0,
        "includeAll": true,
        "label": "service",
        "multi": false,
        "name": "service",
        "options": [],
        "query": {
          "query": "query_result(sum(envoy_cluster_ratelimit_over_limit) by (service_istio_io_canonical_name) or sum(envoy_cluster_ratelimit_ok) by (service_istio_io_canonical_name))",
          "refId": "PrometheusVariableQueryEditor-VariableQuery"
        },
        "refresh": 1,
        "regex": "/.*service_istio_io_canonical_name=\"(.*)\".*/",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
      }
    ]
  },
  "time": {
    "from": "now-5m",
    "to": "now"
  },
  "timepicker": {},
  "timezone": "browser",
  "title": "Global Rate Limit",
  "uid": "d8f95bbc-efb6-41e7-8929-25551b22f3d2",
  "version": 25,
  "weekStart": ""
}

アラートルールの例

アラート設定

説明

PromQL 式

sum (increase(envoy_cluster_ratelimit_over_limit[1m])) by (namespace, service_istio_io_canonical_name) > 10

過去 1 分間の上限に達したリクエスト数を、名前空間とサービス名でグループ化して計算します。カウントが 10 を超えると、アラートがトリガーされます。

アラートメッセージ

Throttling triggered! Namespace: {{$labels.namespace}}, Target service: {{$labels.service_istio_io_canonical_name}}. Number of throttled requests in the last minute: {{ $value }}

アラートメッセージの形式を定義します。メッセージには、名前空間、サービス名、および過去 1 分間の上限に達したリクエスト数が含まれます。

ローカルスロットリング

Envoy プロキシは、トークンバケットアルゴリズムを使用してローカルスロットリングを実装します。このアルゴリズムは、一定のレートで補充されるトークンのバケットを維持することで、サービスに送信されるリクエスト数を制限します。サービスへの各リクエストは 1 つのトークンを消費します。バケットが空の場合、Envoy プロキシはリクエストを拒否します。

ローカルスロットリングとグローバルスロットリングを組み合わせて、階層型保護を提供できます。

ダッシュボードの例

image

次の表で、各パネルについて説明します。

パネル

説明

Requests

次のメトリクスを含むリクエストの概要を表示します:

  • 総リクエスト数 (total_requests)。「Requests Total」パネルに表示されます。

  • スロットリングされたリクエスト (limited_requests)。「Requests Reached Limits」パネルに表示されます。

  • 許可されたリクエスト (unlimited_requests)。「Requests OK」パネルに表示されます。

Requests OK Percent

総リクエスト数に対する許可されたリクエストの割合。

Requests Reached Limits Percent

総リクエスト数に対するスロットリングされたリクエストの割合。

次の JSON をGrafana ダッシュボードにインポートして、クラスター用のローカルスロットリングダッシュボードを作成します。この JSON を変更したり、テンプレートとして使用してカスタムダッシュボードを作成したりすることもできます。

ダッシュボード JSON

{
  "annotations": {
    "list": [
      {
        "builtIn": 1,
        "datasource": {
          "type": "grafana",
          "uid": "-- Grafana --"
        },
        "enable": true,
        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "fiscalYearStartMonth": 0,
  "graphTooltip": 0,
  "id": 167,
  "links": [],
  "liveNow": false,
  "panels": [
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "palette-classic"
          },
          "custom": {
            "axisCenteredZero": false,
            "axisColorMode": "text",
            "axisLabel": "",
            "axisPlacement": "auto",
            "barAlignment": 0,
            "drawStyle": "line",
            "fillOpacity": 0,
            "gradientMode": "none",
            "hideFrom": {
              "legend": false,
              "tooltip": false,
              "viz": false
            },
            "lineInterpolation": "linear",
            "lineWidth": 1,
            "pointSize": 5,
            "scaleDistribution": {
              "type": "linear"
            },
            "showPoints": "auto",
            "stacking": {
              "group": "A",
              "mode": "none"
            }
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": [
          {
            "matcher": {
              "id": "byName",
              "options": "total_requests"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "blue",
                  "mode": "fixed"
                }
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "unlimited_requests"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "dark-green",
                  "mode": "fixed"
                }
              }
            ]
          },
          {
            "matcher": {
              "id": "byName",
              "options": "limited_requests"
            },
            "properties": [
              {
                "id": "color",
                "value": {
                  "fixedColor": "dark-red",
                  "mode": "fixed"
                }
              }
            ]
          }
        ]
      },
      "gridPos": {
        "h": 8,
        "w": 12,
        "x": 0,
        "y": 0
      },
      "id": 1,
      "options": {
        "legend": {
          "calcs": [],
          "displayMode": "list",
          "placement": "bottom",
          "showLegend": true
        },
        "tooltip": {
          "mode": "single",
          "sort": "none",
          "targets": []
        }
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": false,
          "expr": "sum(rate(envoy_http_local_rate_limiter_http_local_rate_limit_enabled{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[60s])) * 30",
          "format": "time_series",
          "instant": false,
          "legendFormat": "total_requests",
          "range": true,
          "refId": "A"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "exemplar": false,
          "expr": "sum(rate(envoy_http_local_rate_limiter_http_local_rate_limit_ok{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[60s])) * 30",
          "format": "time_series",
          "hide": false,
          "instant": false,
          "legendFormat": "unlimited_requests",
          "range": true,
          "refId": "B"
        },
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(rate(envoy_http_local_rate_limiter_http_local_rate_limit_enforced{namespace=~\"$namespace\",pod_name=~\"$pod\",service_istio_io_canonical_name=~\"$service\"}[60s])) * 30",
          "hide": false,
          "instant": false,
          "legendFormat": "limited_requests",
          "range": true,
          "refId": "C"
        }
      ],
      "title": "Requests",
      "transparent": true,
      "type": "aliyun-timeseries-panel"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 4,
        "x": 0,
        "y": 8
      },
      "id": 2,
      "options": {
        "colorMode": "value",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_http_local_rate_limiter_http_local_rate_limit_enabled{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range]))",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests Total",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
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            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 4,
        "x": 4,
        "y": 8
      },
      "id": 5,
      "options": {
        "colorMode": "value",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_http_local_rate_limiter_http_local_rate_limit_ok{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range]))",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests OK",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "mappings": [],
          "thresholds": {
            "mode": "absolute",
            "steps": [
              {
                "color": "green",
                "value": null
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 8,
        "w": 4,
        "x": 8,
        "y": 8
      },
      "id": 4,
      "options": {
        "colorMode": "value",
        "graphMode": "area",
        "justifyMode": "auto",
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "textMode": "auto"
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_http_local_rate_limiter_http_local_rate_limit_enforced{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range]))",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests Reached Limits",
      "type": "stat"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "custom": {
            "neutral": -1
          },
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "red",
                "value": null
              },
              {
                "color": "green",
                "value": 90
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 7,
        "w": 6,
        "x": 0,
        "y": 16
      },
      "id": 6,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_http_local_rate_limiter_http_local_rate_limit_ok{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range])) / sum(increase(envoy_http_local_rate_limiter_http_local_rate_limit_enabled{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range])) * 100",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests OK Percent",
      "type": "gauge"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${DS_PROMETHEUS}"
      },
      "fieldConfig": {
        "defaults": {
          "color": {
            "mode": "thresholds"
          },
          "custom": {
            "neutral": -1
          },
          "mappings": [],
          "max": 100,
          "min": 0,
          "thresholds": {
            "mode": "percentage",
            "steps": [
              {
                "color": "green",
                "value": null
              },
              {
                "color": "red",
                "value": 10
              }
            ]
          }
        },
        "overrides": []
      },
      "gridPos": {
        "h": 7,
        "w": 6,
        "x": 6,
        "y": 16
      },
      "id": 7,
      "options": {
        "orientation": "auto",
        "reduceOptions": {
          "calcs": [
            "lastNotNull"
          ],
          "fields": "",
          "values": false
        },
        "showThresholdLabels": false,
        "showThresholdMarkers": true
      },
      "pluginVersion": "10.0.9",
      "targets": [
        {
          "datasource": {
            "type": "prometheus",
            "uid": "${DS_PROMETHEUS}"
          },
          "editorMode": "code",
          "expr": "sum(increase(envoy_http_local_rate_limiter_http_local_rate_limit_enforced{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range])) / sum(increase(envoy_http_local_rate_limiter_http_local_rate_limit_enabled{namespace=~\"$namespace\", pod_name=~\"$pod\", service_istio_io_canonical_name=~\"$service\"}[$__range])) * 100",
          "instant": false,
          "range": true,
          "refId": "A"
        }
      ],
      "title": "Requests Reached Limits Percent",
      "type": "gauge"
    }
  ],
  "refresh": "",
  "schemaVersion": 38,
  "style": "dark",
  "tags": [],
  "templating": {
    "list": [
      {
        "allValue": ".*",
        "current": {
          "selected": false,
          "text": "datasource",
          "value": "datasource"
        },
        "hide": 0,
        "includeAll": false,
        "label": "datasource",
        "multi": false,
        "name": "DS_PROMETHEUS",
        "options": [],
        "query": "prometheus",
        "queryValue": "datasource",
        "refresh": 1,
        "regex": "",
        "skipUrlSync": false,
        "type": "datasource"
      },
      {
        "allValue": ".*",
        "current": {
          "selected": false,
          "text": "All",
          "value": "$__all"
        },
        "datasource": {
          "type": "prometheus",
          "uid": "ykIxRIhNk"
        },
        "definition": "query_result(sum(envoy_http_local_rate_limiter_http_local_rate_limit_enabled) by (namespace))",
        "hide": 0,
        "includeAll": true,
        "label": "namespace",
        "multi": false,
        "name": "namespace",
        "options": [],
        "query": {
          "query": "query_result(sum(envoy_http_local_rate_limiter_http_local_rate_limit_enabled) by (namespace))",
          "refId": "PrometheusVariableQueryEditor-VariableQuery"
        },
        "refresh": 1,
        "regex": "/.*namespace=\"(.*)\".*/",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
      },
      {
        "allValue": ".*",
        "current": {
          "selected": false,
          "text": "All",
          "value": "$__all"
        },
        "datasource": {
          "type": "prometheus",
          "uid": "ykIxRIhNk"
        },
        "definition": "query_result(sum(envoy_http_local_rate_limiter_http_local_rate_limit_enabled) by (pod_name))",
        "description": "",
        "hide": 0,
        "includeAll": true,
        "label": "pod",
        "multi": false,
        "name": "pod",
        "options": [],
        "query": {
          "query": "query_result(sum(envoy_http_local_rate_limiter_http_local_rate_limit_enabled) by (pod_name))",
          "refId": "PrometheusVariableQueryEditor-VariableQuery"
        },
        "refresh": 1,
        "regex": "/.*pod_name=\"(.*)\".*/",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
      },
      {
        "allValue": ".*",
        "current": {
          "selected": false,
          "text": "All",
          "value": "$__all"
        },
        "datasource": {
          "type": "prometheus",
          "uid": "ykIxRIhNk"
        },
        "definition": "query_result(sum(envoy_http_local_rate_limiter_http_local_rate_limit_enabled) by (service_istio_io_canonical_name))",
        "hide": 0,
        "includeAll": true,
        "label": "service",
        "multi": false,
        "name": "service",
        "options": [],
        "query": {
          "query": "query_result(sum(envoy_http_local_rate_limiter_http_local_rate_limit_enabled) by (service_istio_io_canonical_name))",
          "refId": "PrometheusVariableQueryEditor-VariableQuery"
        },
        "refresh": 1,
        "regex": "/.*service_istio_io_canonical_name=\"(.*)\".*/",
        "skipUrlSync": false,
        "sort": 0,
        "type": "query"
      }
    ]
  },
  "time": {
    "from": "now-5m",
    "to": "now"
  },
  "timepicker": {},
  "timezone": "browser",
  "title": "Local Rate Limit",
  "uid": "859fe8e7-c7dd-46f4-a1c0-c0c7010bcf19",
  "version": 7,
  "weekStart": ""
}

アラートルールの例

パラメータ

説明

PromQL 式

sum (increase(envoy_http_local_rate_limiter_http_local_rate_limit_enforced[1m])) by (namespace, service_istio_io_canonical_name) > 10

直近 1 分間のスロットリングされたリクエスト数を namespace と Service 名ごとにグループ化してクエリします。カウントが 10 を超えるとアラートが発火します。

アラートメッセージ

Throttling triggered! Namespace: {{$labels.namespace}}, Target service: {{$labels.service_istio_io_canonical_name}}. Number of throttled requests in the last minute: {{ $value }}

アラートメッセージの形式を定義します。namespace、Service 名、および直近 1 分間のスロットリングされたリクエスト数が表示されます。

関連操作

Grafana ダッシュボードのインポート

  1. にログインします。 ARMSコンソールを使用します。

  2. 左側のナビゲーションペインで、アクセス管理 をクリックします。

  3. [統合環境] タブで [コンテナーサービス] を選択し、クラスター名で目的の環境を検索してクリックします。[ダッシュボードディレクトリ] をクリックします。

    [ダッシュボードディレクトリ] は、コンテナサービスの詳細ページにある [基本情報] セクションにあります。その値をクリックすると、Grafana ダッシュボードディレクトリが開きます。

  4. [ダッシュボード] タブの右側で、[インポート] をクリックします。

  5. JSON コンテンツを [パネル JSON でインポート] ボックスに貼り付けて [ロード] をクリックし、デフォルト設定のまま [インポート] をクリックします。

    説明

    JSON ファイルをアップロードしてダッシュボードをインポートすることもできます。