{"id":207620,"date":"2025-07-08T08:26:18","date_gmt":"2025-07-08T00:26:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207620\/"},"modified":"2025-07-08T08:26:18","modified_gmt":"2025-07-08T00:26:18","slug":"golang%e4%b8%adgauge%e5%80%bc%e7%9a%84prometheus%e5%8d%95%e5%85%83%e6%b5%8b%e8%af%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207620\/","title":{"rendered":"Golang\u4e2dGauge\u503c\u7684Prometheus\u5355\u5143\u6d4b\u8bd5"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> Golang\u4e2dGauge\u503c\u7684Prometheus\u5355\u5143\u6d4b\u8bd5<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-24 08:18:34<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60Golang<\/span>\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587\u300aGolang\u4e2dGauge\u503c\u7684Prometheus\u5355\u5143\u6d4b\u8bd5\u300b<\/span>\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0Golang<\/span>\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u6709\u4e00\u4e2a\u51fd\u6570\u53ef\u4ee5\u8ba1\u7b97\u4e00\u4e2a\u503c\uff0c\u7136\u540e\u4f7f\u7528 prometheus \u4eea\u8868\u53d8\u91cf\u5c06\u5176\u4fdd\u5b58\uff08\u6216\u81f3\u5c11\u51c6\u5907\u597d\u88ab\u6293\u53d6\uff09\u5728 prometheus \u4e2d\u3002\u6240\u4ee5\u8bbe\u7f6e\u5982\u4e0b\uff1a<\/p>\n

\/\/ prometheus variable: enclosure ambient temperature.\n    errorlog = prometheus.newgauge(prometheus.gaugeopts{\n        name: \"encoded_messages\",\n        help: \"encoded system info\/warning\/error messages\",\n    })<\/pre>\n
\u5728\u6211\u7684\u51fd\u6570\u4e2d\uff0c\u8be5\u503c\u6700\u7ec8\u4fdd\u5b58\u5230\u6570\u636e\u5e93\u4e2d\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
errorLog.Set(float64(123)) \/\/ Capture message to database<\/pre>\n
\u4e3a\u4e86\u6e05\u695a\u8d77\u89c1\uff0c\u6211\u5df2\u5c06\uff08\u8ba1\u7b97\u51fa\u7684\uff09\u53d8\u91cf\u66ff\u6362\u4e3a 123\u3002\u5728\u8ba1\u7b97\u6211\u7684\u503c\u65f6\uff0c\uff08\u7406\u8bba\u4e0a\uff09\u5e94\u8be5\u5f88\u5bb9\u6613\u9a8c\u8bc1\u4fdd\u5b58\u5230\u6570\u636e\u5e93\uff08\u6216\u81f3\u5c11\u51c6\u5907\u597d\u6293\u53d6\uff09\u7684\u503c\u662f\u5426\u4e3a\u4e8b\u5b9e\u4e0a 123\u3002<\/p>\n
\u4e3b\u8981\u529f\u80fd\u6ca1\u6709\u95ee\u9898\uff0c\u4f46\u662f\u73b0\u5728\u6211\u60f3\u7f16\u5199\u4e00\u4e2a\u5355\u5143\u6d4b\u8bd5\u6765\u6d4b\u8bd5\u6240\u8ff0\u529f\u80fd\u3002\u6211\u6709\u8bb8\u591a\u5176\u4ed6\uff08\u672a\u7ecf\u6d4b\u8bd5\u7684\uff09\u529f\u80fd\u5df2\u7ecf\u5728\u5de5\u4f5c\uff0c\u5e76\u4e14\u6570\u636e\u5df2\u6210\u529f\u6293\u53d6\uff0c\u4f46\u6211\u4e5f\u9700\u8981\u4e3a\u8fd9\u4e9b\u529f\u80fd\u521b\u5efa\u5355\u5143\u6d4b\u8bd5\u3002<\/p>\n
\u5728\u5355\u5143\u6d4b\u8bd5\u671f\u95f4\uff0c\u6211\u4e0d\u5e0c\u671b\u5c06\u4efb\u4f55\u865a\u5047\u6570\u636e\u4fdd\u5b58\u5230\u6570\u636e\u5e93\u4e2d\uff0c\u56e0\u6b64\u786e\u5b9e\u9700\u8981\u6709\u4e00\u79cd\u6a21\u62df html \u6293\u53d6\u9875\u9762\u7684\u65b9\u6cd5\uff0c\u5bf9\u5417\uff1f<\/p>\n
\u6211\u67e5\u770b\u4e86\u4e00\u4e9b\u9009\u9879\uff0c\u4f8b\u5982\u8fd9\u91cc\u63d0\u5230\u7684\uff1a \u4f7f\u7528golang prometheus testutil\u8fdb\u884c\u5355\u5143\u6d4b\u8bd5<\/p>\n
\u6211\u8fd8\u9605\u8bfb\u4e86\u6b64\u5904\u4e3a prometheus \u63d0\u4f9b\u7684\u5b9e\u7528\u7a0b\u5e8f\uff1a https:\/\/pkg.go.dev\/github.com\/prometheus\/client_golang\/prometheus\/testutil?utm_source=godoc#collectandcompare \u4e0d\u5e78\u7684\u662f\u6ca1\u6709\u7ed9\u51fa\u4f8b\u5b50\u3002\u6211\u60f3\u4e5f\u8bb8\u201ccollectandcompare\u201d\u5c31\u662f\u6211\u6240\u9700\u8981\u7684\uff0c\u4f46\u6211\u4e00\u76f4\u65e0\u6cd5\u8ba9\u5b83\u5de5\u4f5c\u3002<\/p>\n
\u5e72\u676f\uff01<\/p>\n
 <\/p>\n
\u6b63\u786e\u7b54\u6848<\/h2>\n
 <\/p>\n
\u60a8\u9700\u8981\u4f5c\u4e3a reader \u4f20\u9012\u6587\u672c\u8f93\u51fa\uff08\u4e0e\u60a8\u5728 \/metrics \u7aef\u70b9\u83b7\u5f97\u7684\u76f8\u540c\uff09<\/p>\n
\u8fd9\u662f\u6211\u5bf9\u4ece\u6570\u636e\u5e93\u4e2d\u63d0\u53d6\u7684\u4e00\u4e9b\u6570\u636e\u7684\u6d4b\u8bd5<\/p>\n
func TestCollect(t *testing.T) {\n\n\/\/ setup dummy test data\n    fetchFromDB = func() (ok bool, voltage float64, temp float64, power float64, frequency float64, etoday float64) {\n        return true, 123.1, 99.0, 567.8, 55.5, 789.0\n    }\n    collector := newCollector()\n    ch := make(chan prometheus.Metric)\n    go collector.Collect(ch)\n\n    expected := strings.NewReader(\n        `# HELP voltage voltage\n# TYPE voltage gauge\nvoltage 123.1\n# HELP EToday Total Power today Wh\n# TYPE EToday gauge\nEToday 789.0\n# HELP Frequency AC Frequency\n# TYPE Frequency gauge\nFrequency 55.5\n# HELP Power power\n# TYPE Power gauge\nPower 567.8\n# HELP Temperature temp\n# TYPE Temperature gauge\nTemperature 99.0\n`)\n    err := testutil.CollectAndCompare(collector, expected, \"voltage\", \"EToday\", \"Frequency\", \"Temperature\", \"Power\")\n    if err != nil {\n        t.Errorf(\"%s\", err.Error())\n    }\n\n}\n<\/pre>\n
\u6e90\u4ee3\u7801\u4e2d\u6709\u4e00\u4e9b\u5f88\u597d\u7684\u6d4b\u8bd5\u793a\u4f8b<\/p>\n<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\uff01\u66f4\u591a\u5173\u4e8eGolang\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207620","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207620","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207620"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207620\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207620"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207620"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207620"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}