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Merge pull request #314 from dtaniwaki/support-prometheus
Support prometheus metrics
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,113 @@ | ||
| "use strict"; | ||
|
|
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| var client = require("prom-client"); | ||
|
|
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| class Metrics { | ||
| constructor() { | ||
| this.register = new client.Registry(); | ||
| client.collectDefaultMetrics({ register: this.register }); | ||
|
|
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| this.apiRouteGetCount = new client.Counter({ | ||
| name: "api_route_get", | ||
| help: "Count of API route get requests", | ||
| registers: [this.register], | ||
| }); | ||
|
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| this.apiRouteAddCount = new client.Counter({ | ||
| name: "api_route_add", | ||
| help: "Count of API route add requests", | ||
| registers: [this.register], | ||
| }); | ||
|
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| this.apiRouteDeleteCount = new client.Counter({ | ||
| name: "api_route_delete", | ||
| help: "Count of API route delete requests", | ||
| registers: [this.register], | ||
| }); | ||
|
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| this.findTargetForReqSummary = new client.Summary({ | ||
| name: "find_target_for_req", | ||
| help: "Summary of find target requests", | ||
| registers: [this.register], | ||
| }); | ||
|
|
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| this.lastActivityUpdatingSummary = new client.Summary({ | ||
| name: "last_activity_updating", | ||
| help: "Summary of last activity updating requests", | ||
| registers: [this.register], | ||
| }); | ||
|
|
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| this.requestsWsCount = new client.Counter({ | ||
| name: "requests_ws", | ||
| help: "Count of websocket requests", | ||
| registers: [this.register], | ||
| }); | ||
|
|
||
| this.requestsWebCount = new client.Counter({ | ||
| name: "requests_web", | ||
| help: "Count of web requests", | ||
| registers: [this.register], | ||
| }); | ||
|
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| this.requestsProxyCount = new client.Counter({ | ||
| name: "requests_proxy", | ||
| help: "Count of proxy requests", | ||
| labelNames: ["status"], | ||
| registers: [this.register], | ||
| }); | ||
|
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| this.requestsApiCount = new client.Counter({ | ||
| name: "requests_api", | ||
| help: "Count of API requests", | ||
| labelNames: ["status"], | ||
| registers: [this.register], | ||
| }); | ||
| } | ||
|
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| render(res) { | ||
| return this.register.metrics().then((s) => { | ||
| res.writeHead(200, { "Content-Type": this.register.contentType }); | ||
| res.write(s); | ||
| res.end(); | ||
| }); | ||
| } | ||
| } | ||
|
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| class MockMetrics { | ||
| constructor() { | ||
| return new Proxy(this, { | ||
| get(target, name) { | ||
| const mockCounter = new Proxy( | ||
| {}, | ||
| { | ||
| get(target, name) { | ||
| if (name == "inc") { | ||
| return () => {}; | ||
| } | ||
| if (name == "startTimer") { | ||
| return () => { | ||
| return () => {}; | ||
| }; | ||
| } | ||
| if (name == "labels") { | ||
| return () => { | ||
| return mockCounter; | ||
| }; | ||
| } | ||
| }, | ||
| } | ||
| ); | ||
| return mockCounter; | ||
| }, | ||
| }); | ||
| } | ||
|
|
||
| render(res) { | ||
| return Promise.resolve(); | ||
| } | ||
| } | ||
|
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||
| module.exports = { | ||
| Metrics, | ||
| MockMetrics, | ||
| }; |
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