{"id":86200,"date":"2020-06-22T13:42:20","date_gmt":"2020-06-22T11:42:20","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/monitoring-i-logirovanie-vneshnih-servisov-v-klaster-kubernetes"},"modified":"2020-06-22T13:42:20","modified_gmt":"2020-06-22T11:42:20","slug":"monitoring-i-logirovanie-vneshnih-servisov-v-klaster-kubernetes","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/administrirovanie\/monitoring-i-logirovanie-vneshnih-servisov-v-klaster-kubernetes","title":{"rendered":"Sledov\u00e1n\u00ed a logov\u00e1n\u00ed extern\u00edch slu\u017eeb v klastru Kubernetes","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Sledov\u00e1n\u00ed a logov\u00e1n\u00ed extern\u00edch slu\u017eeb v klastru Kubernetes\" src=\"\/wp-content\/uploads\/2020\/06\/d3de818853c6820311de51e79aec56a6.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDobr\u00fd de\u0148 v\u0161etk\u00fdm.<\/p>\n<p>Nena\u0161iel som v sieti zhrnut\u00e9 pr\u00edru\u010dky o logovan\u00ed a zbieran\u00ed metr\u00edk zo slu\u017eieb tret\u00edch str\u00e1n v syst\u00e9moch rozvinut\u00fdch v <noindex><a rel=\"nofollow\" href=\"https:\/\/kubernetes.io\">Kubernetes<\/a><\/noindex>. Zverej\u0148ujem svoje rie\u0161enie. Tento \u010dl\u00e1nok predpoklad\u00e1, \u017ee u\u017e m\u00e1te funk\u010dn\u00fd <noindex><a rel=\"nofollow\" href=\"https:\/\/prometheus.io\/\">Prometheus<\/a><\/noindex> a in\u00e9 slu\u017eby. Ako pr\u00edklad zdroja \u00fadajov extern\u00e9ho stateful servisu sa pou\u017eije SDB <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\">PostgreSQL<\/a><\/noindex> kontajnera <noindex><a rel=\"nofollow\" href=\"https:\/\/www.docker.com\">Docker<\/a><\/noindex>. V spolo\u010dnosti sa pou\u017e\u00edva bal\u00ed\u010dkov\u00fd mana\u017e\u00e9r <noindex><a rel=\"nofollow\" href=\"https:\/\/helm.sh\">Helm<\/a><\/noindex>, ni\u017e\u0161ie bud\u00fa uveden\u00e9 pr\u00edklady na \u0148om. Pre cel\u00e9 rie\u0161enie pripravujeme vlastn\u00fd chart, ktor\u00fd zah\u0155\u0148a vnoren\u00e9 chartry v\u0161etk\u00fdch pou\u017e\u00edvan\u00fdch slu\u017eieb.<br \/>\n <noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h4>Logovanie<\/h4>\n<p>\nMnoho spolo\u010dnost\u00ed na zbieranie a prezeranie a centraliz\u00e1ciu logov pou\u017e\u00edva technol\u00f3gie <noindex><a rel=\"nofollow\" href=\"https:\/\/www.elastic.co\/\">Elasticsearch<\/a><\/noindex> + <noindex><a rel=\"nofollow\" href=\"https:\/\/www.elastic.co\/products\/logstash\">Logstash<\/a><\/noindex> + <noindex><a rel=\"nofollow\" href=\"https:\/\/www.elastic.co\/products\/kibana\">kibana<\/a><\/noindex>, skr\u00e1tene ELK. V na\u0161om pr\u00edpade nie je potrebn\u00e9 indexova\u0165 obsah a pou\u017eil som \u013eah\u0161\u00ed <noindex><a rel=\"nofollow\" href=\"https:\/\/grafana.com\/oss\/loki\/\">Loki<\/a><\/noindex>. Je k dispoz\u00edcii ako bal\u00edk Helm, pridali sme ho ako subchart a zmenili hodnoty pre ingress a pv pre n\u00e1\u0161 syst\u00e9m.<\/p>\n<p>                        <b class=\"spoiler_title\">values.yaml<\/b><\/p>\n<pre><code class=\"xml\">ingress:\n  enabled: true\n  annotations:\n     kubernetes.io\/ingress.class: nginx\n  hosts:\n    - host: kube-loki.example.domain\n      paths: \n        - \/\n  tls: []\n\n....\n\npersistence:\n  type: pvc\n  enabled: true\n  accessModes:\n    - ReadWriteOnce\n  size: 100Gi\n  finalizers:\n    - kubernetes.io\/pvc-protection\n  existingClaim: \"pv-loki\"\n<\/code><\/pre>\n<p>Na odosielanie logov na in\u0161tanciu <noindex><a rel=\"nofollow\" href=\"https:\/\/grafana.com\/oss\/loki\/\">Loki<\/a><\/noindex> we use <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/grafana\/loki\/tree\/master\/cmd\/docker-driver\">Loki Docker Logging Driver<\/a><\/noindex>.<\/p>\n<p>Je potrebn\u00e9 nain\u0161talova\u0165 toto doplnok na v\u0161etky <noindex><a rel=\"nofollow\" href=\"https:\/\/www.docker.com\">Docker<\/a><\/noindex> hosty, z ktor\u00fdch chcete prij\u00edma\u0165 logy. Existuje nieko\u013eko sp\u00f4sobov, ako nazna\u010di\u0165 d\u00e9monu, ako pou\u017e\u00edva\u0165 doplnok. Vo svojom s\u00fabore yaml vykon\u00e1vam v\u00fdber ovl\u00e1da\u010da <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.docker.com\/compose\/\">Docker Compose<\/a><\/noindex>, ktor\u00fd je s\u00fa\u010das\u0165ou <noindex><a rel=\"nofollow\" href=\"https:\/\/www.ansible.com\/\">Ansible<\/a><\/noindex> playbooku.<\/p>\n<p>                        <b class=\"spoiler_title\">postgres.yaml<\/b><\/p>\n<pre><code class=\"xml\">    - name: Run containers\n      docker_compose:\n        project_name: main-postgres\n        definition:\n          version: '3.7'\n          services:\n            p:\n              image: \"{{ postgres_version }}\"\n              container_name: postgresql\n              restart: always\n              volumes:\n                - \"{{ postgres_dir }}\/data:\/var\/lib\/postgresql\/data\"\n                - \"{{ postgres_dir }}\/postgres_init_scripts:\/docker-entrypoint-initdb.d\"\n              environment:\n                POSTGRES_PASSWORD: {{ postgres_pass }}\n                POSTGRES_USER: {{ postgres_user }}\n              ports:\n                - \"{{ postgres_ip }}:{{ postgres_port }}:5432\"\n              logging:\n                driver: \"loki\"\n                options:\n                  loki-url: \"{{ loki_url }}\"\n                  loki-batch-size: \"{{ loki_batch_size }}\"\n                  loki-retries: \"{{ loki_retries }}\"\n...\n<\/code><\/pre>\n<p>\nkde loki_url: <noindex><a rel=\"nofollow\" href=\"http:\/\/kube-loki.example.domain\/loki\/api\/v1\/push\">kube-loki.example.domain\/loki\/api\/v1\/push<\/a><\/noindex> <\/p>\n<h4>Met\u00f3dy<\/h4>\n<p>\n Zbieraj\u00fa sa metriky z PostgreSQL pomocou <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/wrouesnel\/postgres_exporter\">postgres_exporter<\/a><\/noindex> pre <noindex><a rel=\"nofollow\" href=\"https:\/\/prometheus.io\/\">Prometheus<\/a><\/noindex>. Pokra\u010dovanie vo vy\u0161\u0161ie uvedenom s\u00fabore <noindex><a rel=\"nofollow\" href=\"https:\/\/www.ansible.com\/\">Ansible<\/a><\/noindex> playbooku.<\/p>\n<p>                        <b class=\"spoiler_title\">postgres.yaml<\/b><\/p>\n<pre><code class=\"xml\">...\n            pexp:\n              image: \"wrouesnel\/postgres_exporter\"\n              container_name: pexporter\n              restart: unless-stopped\n              environment:\n                DATA_SOURCE_NAME: \"postgresql:\/\/{{ postgres_user }}:{{ postgres_pass }}@p:5432\/postgres?sslmode=disable\"\n              ports:\n                - \"{{ postgres_ip }}:{{ postgres_exporter_port }}:9187\"\n              logging:\n                driver: \"json-file\"\n                options:\n                  max-size: \"5m\"\n...\n<\/code><\/pre>\n<p>Pre lep\u0161iu preh\u013eadnos\u0165 n\u00e1zvov extern\u00fdch stateful slu\u017eieb ich zap\u00ed\u0161eme cez Endpoints.<\/p>\n<p>                        <b class=\"spoiler_title\">postgres-service.yaml<\/b><\/p>\n<pre><code class=\"xml\">apiVersion: v1\nkind: Endpoints\nmetadata:\n  name: postgres-exporter\nsubsets:\n  - addresses:\n      - ip: {{ .Values.service.postgres.ip }}\n    ports:\n      - port: {{ .Values.service.postgres.port }}\n        protocol: TCP\n---\napiVersion: v1\nkind: Service\nmetadata:\n  name: postgres-exporter\n  labels:\n    chart:  \"{{ .Chart.Name }}-{{ .Chart.Version | replace \"+\" \"_\" }}\"\nspec:\n  ports:\n    - protocol: TCP\n      port: {{ .Values.service.postgres.port }}\n      targetPort: {{ .Values.service.postgres.port }}\n<\/code><\/pre>\n<p>Nastavenie Prometheus na z\u00edskavanie \u00fadajov z postgres_exporter sa vykon\u00e1va \u00fapravou values v subcharte.<\/p>\n<p>                        <b class=\"spoiler_title\">values.yaml<\/b><\/p>\n<pre><code class=\"xml\">scrape_configs:\n...\n  - job_name: postgres-exporter\n    static_configs:\n      - targets: \n         - postgres-exporter.applicationnamespace.svc.cluster.local:9187\n        labels:\n          alias: postgres\n...\n<\/code><\/pre>\n<p>Na vizualiz\u00e1ciu z\u00edskan\u00fdch \u00fadajov nain\u0161talujte pr\u00edslu\u0161n\u00fd Dashboard v<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/grafana.com\">Grafana<\/a><\/noindex> a nastavte zdroje \u00fadajov. To je mo\u017en\u00e9 vykona\u0165 aj prostredn\u00edctvom values v subcharte Grafana.<\/p>\n<p>                        <b class=\"spoiler_title\">Ako to vyzer\u00e1<\/b><br \/>\n                        <img decoding=\"async\" alt=\"Sledov\u00e1n\u00ed a logov\u00e1n\u00ed extern\u00edch slu\u017eeb v klastru Kubernetes\" src=\"\/wp-content\/uploads\/2020\/06\/01d9ced9bc50b730bf55f20f8de99daf.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>\nD\u00fafam, \u017ee tento stru\u010dn\u00fd \u010dl\u00e1nok v\u00e1m pomohol pochopi\u0165 z\u00e1kladn\u00e9 my\u0161lienky obsiahnut\u00e9 v tomto rie\u0161en\u00ed a u\u0161etr\u00ed \u010das pri nastavovan\u00ed monitorovania a logovania extern\u00fdch slu\u017eieb pre Loki\/Prometheus v klastre Kubernetes.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/505968\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u043e\u0431\u0440\u043e\u0433\u043e \u0432\u0441\u0435\u043c. \u042f \u043d\u0435 \u043d\u0430\u0448\u0435\u043b \u0432 \u0441\u0435\u0442\u0438 \u043e\u0431\u043e\u0431\u0449\u0435\u043d\u043d\u043e\u0433\u043e \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u0430 \u043f\u043e \u043b\u043e\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044e \u0438 \u0441\u0431\u043e\u0440\u0443 \u043c\u0435\u0442\u0440\u0438\u043a \u0441\u043e \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u0445 \u0441\u0435\u0440\u0432\u0438\u0441\u043e\u0432 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0440\u0430\u0437\u0432\u0435\u0440\u043d\u0443\u0442\u044b\u0435 \u0432 Kubernetes. \u041f\u0443\u0431\u043b\u0438\u043a\u0443\u044e \u0441\u0432\u043e\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0435. \u0414\u0430\u043d\u043d\u0430\u044f \u0441\u0442\u0430\u0442\u044c\u044f \u043f\u043e\u0434\u0440\u0430\u0437\u0443\u043c\u0435\u0432\u0430\u0435\u0442, \u0447\u0442\u043e \u0443 \u0432\u0430\u0441 \u0443\u0436\u0435 \u0438\u043c\u0435\u0435\u0442\u0441\u044f \u0440\u0430\u0431\u043e\u0447\u0438\u0439 Prometheus \u0438 \u0434\u0440\u0443\u0433\u0438\u0435 \u0441\u043b\u0443\u0436\u0431\u044b. \u0412 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043f\u0440\u0438\u043c\u0435\u0440\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u0432\u043d\u0435\u0448\u043d\u0435\u0433\u043e stateful-\u0441\u0435\u0440\u0432\u0438\u0441\u0430 \u0431\u0443\u0434\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0421\u0423\u0411\u0414 PostgreSQL \u0432 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u0435 Docker. \u0412 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":86201,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-86200","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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