{"id":38253,"date":"2019-10-31T22:22:35","date_gmt":"2019-10-31T19:22:35","guid":{"rendered":"https:\/\/prohoster.info\/blog\/monitoring-postgres-vnutri-openshift\/"},"modified":"2019-10-31T22:22:35","modified_gmt":"2019-10-31T19:22:35","slug":"monitoring-postgres-vnutri-openshift","status":"publish","type":"post","link":"https:\/\/prohoster.info\/de\/blog\/administrirovanie\/monitoring-postgres-vnutri-openshift","title":{"rendered":"\u00dcberwachung von Postgres innerhalb von Openshift","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Guten Tag, liebe Habr-Bewohner!<\/p>\n<p>Heute m\u00f6chte ich Ihnen erz\u00e4hlen, wie wir dringend PostgreSQL und einige weitere Entit\u00e4ten im OpenShift-Cluster \u00fcberwachen wollten und wie wir das umgesetzt haben.<\/p>\n<p>Wir hatten Folgendes:<\/p>\n<ul>\n<li>OpenShift<\/li>\n<li>Helm<\/li>\n<li>Prometheus<\/li>\n<\/ul>\n<p>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nF\u00fcr die Arbeit mit der Java-Anwendung war alles ziemlich einfach und klar, genauer gesagt:<\/p>\n<p>1) Hinzuf\u00fcgen zur build.gradle <\/p>\n<pre><code class=\"plaintext\"> implementation \"io.micrometer:micrometer-registry-prometheus\"<\/code><\/pre>\n<p>\n2) Starten von Prometheus mit Konfiguration <\/p>\n<pre><code class=\"xml\"> - job_name: 'job-name'\n    metrics_path: '\/actuator\/prometheus'\n    scrape_interval: 5s\n    kubernetes_sd_configs:\n    - role: pod\n      namespaces:\n        names: \n          - 'name'<\/code><\/pre>\n<p>\n3) Hinzuf\u00fcgen der Anzeige in Grafana <\/p>\n<p>Alles war ziemlich einfach und allt\u00e4glich, bis der Zeitpunkt kam, an dem wir die Datenbanken \u00fcberwachen mussten, die sich in unserem Namespace befanden (ja, das ist schlecht, so macht es niemand, aber es gibt unterschiedliche Situationen).<\/p>\n<h3>Wie funktioniert das? <\/h3>\n<p>\nNeben dem Pod mit PostgreSQL und Prometheus ben\u00f6tigen wir noch eine weitere Entit\u00e4t - den Exporter.<\/p>\n<p>Ein Exporter ist im abstrahierten Sinne ein Agent, der Metriken von der Anwendung oder sogar <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/de\/server\/dts-los-angeles\/\"   title=\"Server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3521\">Server<\/a>. Der PostgreSQL-Exporter ist in Go geschrieben, funktioniert nach dem Prinzip der Ausf\u00fchrung von SQL-Skripten auf der Datenbank und der anschlie\u00dfenden Abholung der Ergebnisse durch Prometheus. Dies erm\u00f6glicht auch die Erweiterung der gesammelten Metriken durch eigene.<\/p>\n<p>Wir deployen ihn so (Beispiel deployment.yaml, unverbindlich):<\/p>\n<pre><code class=\"xml\">\n---\napiVersion: extensions\/v1beta1\nkind: Deployment\nmetadata:\n  name: postgres-exporter\n  labels:\n    app: {{ .Values.name }}\n    monitoring: prometheus\nspec:\n  serviceName: {{ .Values.name }}\n  replicas: 1\n  revisionHistoryLimit: 5\n  template:\n    metadata:\n      labels:\n        app: postgres-exporter\n        monitoring: prometheus\n    spec:\n      containers:\n      - env:\n        - name: DATA_SOURCE_URI\n          value: postgresdb:5432\/pstgr?sslmode=disable\n        - name: DATA_SOURCE_USER\n          value: postgres\n        - name: DATA_SOURCE_PASS\n          value: postgres\n        resources:\n          limits:\n            cpu: 100m\n            memory: 50Mi\n          requests:\n            cpu: 100m\n            memory: 50Mi\n        livenessProbe:\n          tcpSocket:\n            port: metrics\n          initialDelaySeconds: 30\n          periodSeconds: 30\n        readinessProbe:\n          tcpSocket:\n            port: metrics\n          initialDelaySeconds: 10\n          periodSeconds: 30\n        image: exporter\n        name: postgres-exporter\n        ports:\n        - containerPort: 9187\n          name: metrics<\/code><\/pre>\n<p>\nAu\u00dferdem ben\u00f6tigten wir einen Service und einen ImageStream.<\/p>\n<p>Nach dem Deployment wollen wir nat\u00fcrlich, dass sich alle gegenseitig sehen.<\/p>\n<p>F\u00fcgen Sie dem Prometheus-Konfigurationsst\u00fcck Folgendes hinzu:<\/p>\n<pre><code class=\"xml\">  - job_name: 'postgres_exporter'\n    metrics_path: '\/metrics'\n    scrape_interval: 5s\n    dns_sd_configs:\n    - names:\n      - 'postgres-exporter'\n      type: 'A'\n      port: 9187<\/code><\/pre>\n<p>\nUnd hier hat alles funktioniert, es bleibt nur noch, all das in Grafana hinzuzuf\u00fcgen und das Ergebnis zu genie\u00dfen.<\/p>\n<p>Neben der M\u00f6glichkeit, eigene Anfragen hinzuzuf\u00fcgen, kann man in Prometheus die Einstellungen \u00e4ndern, um gezielt die ben\u00f6tigten Metriken zu sammeln.<\/p>\n<p>Auf die gleiche Weise wurde es gemacht f\u00fcr:<\/p>\n<ul>\n<li>Kafka<\/li>\n<li>Elasticsearch<\/li>\n<li>Mongo<\/li>\n<\/ul>\n<p>\nP.S. Alle Daten zu Namen, Ports und anderem sind erfunden und enthalten keine Informationen. <\/p>\n<p>N\u00fctzliche Links:<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/prometheus.io\/docs\/instrumenting\/exporters\/\">Liste verschiedener Exporter<\/a><\/noindex><br \/>\n<br \/>Quelle: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/467915\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0431\u0440\u043e\u0433\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u0441\u0443\u0442\u043e\u043a \u0436\u0438\u0442\u0435\u043b\u0438 \u0425\u0430\u0431\u0440\u0430! \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u0445\u043e\u0447\u0443 \u0440\u0430\u0441\u0441\u043a\u0430\u0437\u0430\u0442\u044c \u0432\u0430\u043c, \u043a\u0430\u043a \u043d\u0430\u043c \u043e\u0447\u0435\u043d\u044c \u0445\u043e\u0442\u0435\u043b\u043e\u0441\u044c \u043c\u043e\u043d\u0438\u0442\u043e\u0440\u0438\u0442\u044c postgres \u0438 \u0435\u0449\u0435 \u043f\u0430\u0440\u0443 \u0441\u0443\u0449\u043d\u043e\u0441\u0442\u0435\u0439 \u0432\u043d\u0443\u0442\u0440\u0438 \u043a\u043b\u0430\u0441\u0442\u0435\u0440\u0430 OpenShift \u0438 \u043a\u0430\u043a \u043c\u044b \u044d\u0442\u043e \u0441\u0434\u0435\u043b\u0430\u043b\u0438. \u041d\u0430 \u0432\u0445\u043e\u0434\u0435 \u0438\u043c\u0435\u043b\u0438: Openshift Helm Prometheus \u0414\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 java \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435\u043c \u0432\u0441\u0435 \u0431\u044b\u043b\u043e \u0434\u043e\u0432\u043e\u043b\u044c\u043d\u043e \u043f\u0440\u043e\u0441\u0442\u043e \u0438 \u043f\u0440\u043e\u0437\u0440\u0430\u0447\u043d\u043e, \u0430 \u0435\u0441\u043b\u0438 \u0431\u044b\u0442\u044c \u0442\u043e\u0447\u043d\u0435\u0435, \u0442\u043e: 1) \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0432 build.gradle implementation &#171;io.micrometer:micrometer-registry-prometheus&#187; [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-38253","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0414\u043e\u0431\u0440\u043e\u0433\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u0441\u0443\u0442\u043e\u043a \u0436\u0438\u0442\u0435\u043b\u0438 \u0425\u0430\u0431\u0440\u0430! 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Heute m\u00f6chte ich Ihnen erz\u00e4hlen, wie sehr wir danach verlangten, PostgreSQL und einige andere Entit\u00e4ten innerhalb des OpenShift-Clusters zu \u00fcberwachen und wie wir das umgesetzt haben. 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