{"id":56206,"date":"2020-02-07T00:00:00","date_gmt":"2020-02-06T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/loki-sbor-logov-ispolzuya-podhod-prometheus"},"modified":"2021-02-01T11:41:00","modified_gmt":"2021-02-01T09:41:00","slug":"loki-sbor-logov-ispolzuya-podhod-prometheus","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/administrirovanie\/loki-sbor-logov-ispolzuya-podhod-prometheus","title":{"rendered":"Loki \u2014 zber logov s vyu\u017eit\u00edm pr\u00edstupu Prometheus","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><i>Ahojte, Habr\u00e1ci! V predve\u010der za\u010diatku nov\u00e9ho z\u00e1pisu na kurz <noindex><a rel=\"nofollow\" href=\"https:\/\/otus.pw\/P37L\/\">\u201ePraktiky a n\u00e1stroje DevOps\u201c<\/a><\/noindex> sme pre v\u00e1s pripravili preklad zauj\u00edmav\u00e9ho materi\u00e1lu.<\/i><\/p>\n<p>\u010cl\u00e1nok je kr\u00e1tke \u00favodn\u00e9 slovo o Loki. Projekt Loki <noindex><a rel=\"nofollow\" href=\"https:\/\/grafana.com\/oss\/loki\/\">je podporovan\u00fd Grafanou<\/a><\/noindex> a je zameran\u00fd na centralizovan\u00fd zber logov (zo serverov alebo kontajnerov).<\/p>\n<p>Hlavn\u00fdm zdrojom in\u0161pir\u00e1cie pre Loki bola <noindex><a rel=\"nofollow\" href=\"http:\/\/prometheus.io\/\">Prometheus<\/a><\/noindex> my\u0161lienka aplik\u00e1cie jeho pr\u00edstupov k spr\u00e1ve logov:<\/p>\n<ul>\n<li>pou\u017e\u00edvanie \u0161t\u00edtkov (labels) na uchov\u00e1vanie \u00fadajov<\/li>\n<li>n\u00edzka spotreba zdrojov<\/li>\n<\/ul>\n<p>Na princ\u00edpy fungovania Prometheus sa e\u0161te vr\u00e1time a prinesieme nieko\u013eko pr\u00edkladov jeho vyu\u017eitia v kontexte Kubernetes.<\/p>\n<h3>Nieko\u013eko slov o Prometheus<\/h3>\n<p>Aby ste plne porozumeli, ako funguje Loki, je d\u00f4le\u017eit\u00e9 urobi\u0165 krok sp\u00e4\u0165 a trochu si spomen\u00fa\u0165 na Prometheus.<\/p>\n<p>Jednou z charakteristick\u00fdch \u010d\u0155t Prometheus je vy\u0165ahovanie metr\u00edk z zbern\u00fdch bodov (prostredn\u00edctvom export\u00e9rov) a ich ulo\u017eenie v TSDB (Time Series Data Base, datab\u00e1za \u010dasov\u00fdch radov) s pridan\u00edm metad\u00e1t vo forme \u0161t\u00edtkov.<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>Pre\u010do to potrebujeme<\/h3>\n<p>V poslednej dobe sa Prometheus stal de facto \u0161tandardom v svete kontajnerov a Kubernetes: jeho in\u0161tal\u00e1cia je ve\u013emi jednoduch\u00e1 a v Kubernetes klastri je od za\u010diatku pr\u00edtomn\u00fd koncov\u00fd bod pre Prometheus. Prometheus m\u00f4\u017ee taktie\u017e vy\u0165ahova\u0165 metriky z aplik\u00e1ci\u00ed nasaden\u00fdch v kontajneroch, pri\u010dom si zachov\u00e1va ur\u010dit\u00e9 \u0161t\u00edtky. Preto je monitoring aplik\u00e1ci\u00ed ve\u013emi jednoduch\u00fd na realiz\u00e1ciu.<\/p>\n<p>Nane\u0161\u0165astie, st\u00e1le neexistuje \u201ena k\u013e\u00fa\u010d\u201c rie\u0161enie na spr\u00e1vu logov, tak\u017ee si mus\u00edte n\u00e1js\u0165 vlastn\u00e9 rie\u0161enie:<\/p>\n<ul>\n<li>riaden\u00e1 cloudov\u00e1 slu\u017eba na centraliz\u00e1ciu logov (AWS, Azure alebo Google)<\/li>\n<li>monitorovac\u00ed servis \u201emonitoring ako slu\u017eba\u201c (monitoring as a service) (napr\u00edklad Datadog)<\/li>\n<li>vytvorenie vlastnej slu\u017eby zberu logov.<\/li>\n<\/ul>\n<p>Pre tretiu mo\u017enos\u0165 som tradi\u010dne pou\u017e\u00edval Elasticsearch, aj ke\u010f som nebol v\u017edy spokojn\u00fd (najm\u00e4 s jeho n\u00e1ro\u010dnos\u0165ou a zlo\u017eitost\u00ed nastavenia).<\/p>\n<p>Loki bol navrhnut\u00fd s cie\u013eom zjednodu\u0161i\u0165 implement\u00e1ciu v s\u00falade s nasleduj\u00facimi princ\u00edpmi:<\/p>\n<ul>\n<li>by\u0165 jednoduch\u00fd na za\u010diatok<\/li>\n<li>spotrebova\u0165 m\u00e1lo zdrojov<\/li>\n<li>fungova\u0165 samostatne bez akejko\u013evek \u0161peci\u00e1lnej \u00fadr\u017eby<\/li>\n<li>sl\u00fa\u017ei\u0165 ako doplnok k Prometheus na pomoc pri zis\u0165ovan\u00ed ch\u00fdb<\/li>\n<\/ul>\n<p>Toto zjednodu\u0161enie v\u0161ak prich\u00e1dza na \u00fakor niektor\u00fdch kompromisov. Jedn\u00fdm z nich je neindexova\u0165 obsah. Preto h\u013eadanie v texte nie je ve\u013emi efekt\u00edvne alebo rozsiahle a neumo\u017e\u0148uje aplika\u010dn\u00fa \u0161tatistiku textov\u00e9ho obsahu. Av\u0161ak, ke\u010f\u017ee Loki sa chce sta\u0165 ekvivalentom grep a doplnkom k Prometheovi, nie je to nedostatok.<\/p>\n<h3>Vy\u0161etrovanie incidentov<\/h3>\n<p>Aby sme lep\u0161ie pochopili, pre\u010do Loki nepotrebuje index\u00e1ciu, vr\u00e1\u0165me sa k met\u00f3de vy\u0161etrovania incidentov, ktor\u00fa pou\u017e\u00edvali v\u00fdvoj\u00e1ri Loki:<\/p>\n<p><img decoding=\"async\" alt=\"Loki \u2014 zber logov s vyu\u017eit\u00edm pr\u00edstupu Prometheus\" src=\"\/wp-content\/uploads\/2020\/02\/2f9ba72d68ccafbe44ab1700d08e3a33.jpg\" style=\"display:block;margin: 0 auto;\"><br \/>\n<i>1 Upozornenie \u2192 2 Dashboard \u2192 3 Adhoc dotaz \u2192 4 Agreg\u00e1cia logov \u2192 5 Distribuovan\u00e9 trasovanie \u2192 6 Opraven\u00e9!<br \/>\n(1 Upozornenie \u2192 2 Dashboard \u2192 3 Adhoc dotaz \u2192 4 Agreg\u00e1cia logov \u2192 5 Distribuovan\u00e9 trasovanie \u2192 6 Opraven\u00e9!)<\/i><\/p>\n<p>My\u0161lienka spo\u010d\u00edva v tom, \u017ee dostaneme nejak\u00e9 upozornenie (Slack notifik\u00e1cia, SMS a pod.) a potom:<\/p>\n<ul>\n<li>pozer\u00e1me sa na dashboardy Grafana<\/li>\n<li>pozer\u00e1me sa na metriky slu\u017eieb (napr\u00edklad v Prometheovi)<\/li>\n<li>pozer\u00e1me sa na z\u00e1znamy logov (napr\u00edklad v Elasticsearch)<\/li>\n<li>mo\u017eno sa pozrieme na distribuovan\u00e9 trasy (Jaeger, Zipkin a pod.)<\/li>\n<li>a nakoniec oprav\u00edme p\u00f4vodn\u00fd probl\u00e9m.<\/li>\n<\/ul>\n<p>Tu, v pr\u00edpade stacku Grafana + Prometheus + Elasticsearch + Zipkin, bude potrebn\u00e9 pou\u017ei\u0165 \u0161tyri r\u00f4zne n\u00e1stroje. Aby sme skr\u00e1tili \u010das, bolo by dobr\u00e9 ma\u0165 mo\u017enos\u0165 vykon\u00e1va\u0165 v\u0161etky tieto kroky pomocou jedn\u00e9ho n\u00e1stroja: Grafana. Je potrebn\u00e9 poznamena\u0165, \u017ee tak\u00fdto pr\u00edstup k vy\u0161etrovaniu bol implementovan\u00fd v Grafane od verzie 6. T\u00fdmto sp\u00f4sobom je mo\u017en\u00e9 z\u00edskava\u0165 d\u00e1ta z Prometheusa priamo z Grafany.<\/p>\n<p><img decoding=\"async\" alt=\"Loki \u2014 zber logov s vyu\u017eit\u00edm pr\u00edstupu Prometheus\" src=\"\/wp-content\/uploads\/2020\/02\/eefc5a599a23abeb0624f4e3265a31e6.jpg\" style=\"display:block;margin: 0 auto;\"><br \/>\n<i>Obrazovka Explorer je rozdelen\u00e1 medzi Prometheus a Loki<\/i><\/p>\n<p>Na tejto obrazovke m\u00f4\u017eete vidie\u0165 logy v Loki, ktor\u00e9 s\u00fa spojen\u00e9 s metrikami Prometheus pomocou konceptu rozdelenia obrazovky. Od verzie 6.5, Grafana umo\u017e\u0148uje spracov\u00e1va\u0165 identifik\u00e1tor trasy (trace id) v z\u00e1znamoch logov Loki na prepojenie s va\u0161imi ob\u013e\u00faben\u00fdmi n\u00e1strojmi distribuovan\u00e9ho trasovania (Jaeger).<\/p>\n<h3>Lok\u00e1lne testovanie Loki<\/h3>\n<p>Najjednoduch\u0161\u00ed sp\u00f4sob, ako lok\u00e1lne testova\u0165 Loki, je pou\u017ei\u0165 docker-compose. S\u00fabor docker-compose sa nach\u00e1dza v repozit\u00e1ri Loki. Z\u00edska\u0165 repozit\u00e1r m\u00f4\u017eete pomocou nasleduj\u00faceho pr\u00edkazu <code>git<\/code>:<\/p>\n<pre><code class=\"go\">$ git clone https:\/\/github.com\/grafana\/loki.git<\/code><\/pre>\n<p>Potom mus\u00edte prejs\u0165 do adres\u00e1ra production:<\/p>\n<pre><code class=\"go\">$ cd production<\/code><\/pre>\n<p>Potom m\u00f4\u017eete z\u00edska\u0165 najnov\u0161iu verziu Docker obrazov:<\/p>\n<pre><code class=\"go\">$ docker-compose pull<\/code><\/pre>\n<p>Nakoniec sa stack Loki sp\u00fa\u0161\u0165a nasleduj\u00facim pr\u00edkazom:<\/p>\n<pre><code class=\"go\">$ docker-compose up<\/code><\/pre>\n<h3>Architekt\u00fara Loki<\/h3>\n<p>Tu je mal\u00e1 sch\u00e9ma s architekt\u00farou Loki:<\/p>\n<p><img decoding=\"async\" alt=\"Loki \u2014 zber logov s vyu\u017eit\u00edm pr\u00edstupu Prometheus\" src=\"\/wp-content\/uploads\/2020\/02\/fc5703bcebc1391e719640e99544f909.jpg\" style=\"display:block;margin: 0 auto;\"><br \/>\n<i>Princ\u00edpy architekt\u00fary Loki<\/i><\/p>\n<p>Webov\u00fd klient sp\u00fa\u0161\u0165a aplik\u00e1cie na serveri, Promtail zhroma\u017e\u010fuje logy a posiela ich do Loki, webov\u00fd klient tie\u017e odosiela metad\u00e1ta do Loki. Loki v\u0161etko agreguje a posiela do Grafany.<br \/>\nLoki je spusten\u00fd. Na zobrazenie existuj\u00facich komponentov zadajte nasleduj\u00faci pr\u00edkaz:<\/p>\n<pre><code class=\"go\">$ docker ps<\/code><\/pre>\n<p>Ak m\u00e1te \u010derstvo nain\u0161talovan\u00fd Docker, pr\u00edkaz by mal vr\u00e1ti\u0165 nasleduj\u00faci v\u00fdsledok:<\/p>\n<pre><code class=\"go\">OBR\u00c1ZOK               PORTY                  N\u00c1ZVY\ngrafana\/promtail:                          production_promtail_1\ngrafana\/grafana: m  0.0.0.0:3000-&gt;3000\/tcp production_grafana_1\ngrafana\/loki: late  80\/tcp,0.0.0.0:3100... production_loki_1<\/code><\/pre>\n<p>Vid\u00edme nasleduj\u00face komponenty:<\/p>\n<ul>\n<li>Promtail: agent zodpovedn\u00fd za centraliz\u00e1ciu logov<\/li>\n<li>Grafana: zn\u00e1my n\u00e1stroj pre dashboards<\/li>\n<li>Loki: d\u00e9mon centraliz\u00e1cie d\u00e1t<\/li>\n<\/ul>\n<p>V r\u00e1mci klasickej infra\u0161trukt\u00fary (napr\u00edklad na b\u00e1ze virtu\u00e1lnych strojov) mus\u00ed by\u0165 na ka\u017edom po\u010d\u00edta\u010di nasaden\u00fd agent Promtail. Grafana a Loki m\u00f4\u017eu by\u0165 nain\u0161talovan\u00e9 na jednom po\u010d\u00edta\u010di.<\/p>\n<h3>Nasadenie v Kubernetes<\/h3>\n<p>In\u0161tal\u00e1cia komponentov Loki v Kubernetes bude pozost\u00e1va\u0165 z nasledovn\u00e9ho:<\/p>\n<ul>\n<li>daemonSet na nasadenie agenta Promtail na ka\u017edom z po\u010d\u00edta\u010dov v klastru serverov<\/li>\n<li>nasadenie (Deployment) Loki<\/li>\n<li>a nakoniec - nasadenie Grafany.<\/li>\n<\/ul>\n<p>Na\u0161\u0165astie, Loki je dostupn\u00fd vo forme bal\u00edka Helm, \u010do zjednodu\u0161uje jeho nasadenie.<\/p>\n<h3>In\u0161tal\u00e1cia cez Helm<\/h3>\n<p>Helm by ste u\u017e mali ma\u0165 nain\u0161talovan\u00fd. M\u00f4\u017eete si ho stiahnu\u0165 z GitHub-repozit\u00e1ra projektu. Nain\u0161taluje sa rozbalen\u00edm arch\u00edvu, ktor\u00fd zodpoved\u00e1 va\u0161ej architekt\u00fare, a pridan\u00edm helm do <code>$PATH<\/code>.<\/p>\n<blockquote><p><i><b>Pozn\u00e1mka:<\/b> verzia 3.0.0 Helm bola ned\u00e1vno vydan\u00e1. Ke\u010f\u017ee v nej do\u0161lo k mnoh\u00fdm zmen\u00e1m, \u010ditate\u013eovi sa odpor\u00fa\u010da chv\u00ed\u013eu po\u010dka\u0165, k\u00fdm ju za\u010dne pou\u017e\u00edva\u0165<\/i>.<\/p><\/blockquote>\n<h3>Pridanie zdroja pre Helm<\/h3>\n<p>Prv\u00fdm krokom bude pridanie repozit\u00e1ra \"loki\" pomocou nasleduj\u00faceho pr\u00edkazu:<\/p>\n<pre><code class=\"go\">$ helm add loki https:\/\/grafana.github.io\/loki\/charts<\/code><\/pre>\n<p>Potom je mo\u017en\u00e9 vyh\u013ead\u00e1va\u0165 bal\u00edky s n\u00e1zvom \"loki\":<\/p>\n<pre><code class=\"go\">$ helm search loki<\/code><\/pre>\n<p>V\u00fdsledok:<\/p>\n<pre><code class=\"go\">loki\/loki       0.17.2 v0.4.0 Loki: ako Prometheus, ale pre logy.\nloki\/loki-stack 0.19.1 v0.4.0 Loki: ako Prometheus, ale pre logy.\nloki\/fluent-bit 0.0.2  v0.0.1 Pou\u017e\u00edva fluent-bit Loki go plugin pre...\nloki\/promtail   0.13.1 v0.4.0 Zodpovedn\u00fd za zhroma\u017e\u010fovanie logov a...<\/code><\/pre>\n<p>Tieto bal\u00edky maj\u00fa nasleduj\u00face funkcie:<\/p>\n<ul>\n<li>bal\u00edk <b>loki\/loki<\/b> zodpoved\u00e1 len serveru Loki<\/li>\n<li>bal\u00edk <b>loki\/fluent-bit<\/b> umo\u017e\u0148uje v\u00e1m nasadi\u0165 DaemonSet, vyu\u017e\u00edvaj\u00fac fluent-bit na zhroma\u017e\u010fovanie logov namiesto Promtail<\/li>\n<li>bal\u00edk <b>loki\/promtail<\/b> obsahuje agent pre zhroma\u017e\u010fovanie logov<\/li>\n<li>bal\u00edk <b>loki\/loki-stack<\/b>, umo\u017e\u0148uje okam\u017eit\u00e9 nasadenie Loki spolu s Promtail.<\/li>\n<\/ul>\n<h3>In\u0161tal\u00e1cia Loki<\/h3>\n<p>Aby ste nasadili Loki v Kubernetes, zadajte nasleduj\u00faci pr\u00edkaz v priestore n\u00e1zvov \"monitoring\":<\/p>\n<pre><code class=\"go\">$ helm upgrade --install loki loki\/loki-stack --namespace monitoring<\/code><\/pre>\n<p>Ak chcete ulo\u017ei\u0165 na disk, pridajte parameter <code>--set loki.persistence.enabled = true:<\/code><\/p>\n<pre><code class=\"go\">$ helm upgrade --install loki loki\/loki-stack \n              --namespace monitoring \n              --set loki.persistence.enabled=true<\/code><\/pre>\n<blockquote><p><i><b>Pozn\u00e1mka:<\/b> ak chcete nasadi\u0165 aj Grafana, pridajte parameter <code>--set grafana.enabled = true<\/code><\/i><\/p><\/blockquote>\n<p>Pri spusten\u00ed tejto pr\u00edkazu by ste mali dosta\u0165 nasleduj\u00faci v\u00fdstup:<\/p>\n<pre><code class=\"go\">NAHRAZOVAN&Eacute;: Ut 19. novembra 2019 15:56:54\nMIESTO: monitoring\nSTAV: NAHRAN&Eacute;\nZDROJE:\n==&amp;gt; v1\/ClusterRole\nN&Aacute;ZOV VEK\nloki-promtail-clusterrole 189d\n&hellip;\nPOZN&Aacute;MKY:\nStack Loki bol nasaden&yacute; do v&aacute;&scaron;ho clusteru. Loki m&ocirc;\u017ee by\u0165 teraz pridan&yacute; ako zdroj &uacute;dajov v Grafana.\nPozrite sa &lt;a href=&quot;http:\/\/docs.grafana.org\/features\/datasources\/loki\/&quot;&gt;http:\/\/docs.grafana.org\/features\/datasources\/loki\/&lt;\/a&gt; na \u010fal&scaron;ie podrobnosti.<\/code><\/pre>\n<p>Ke\u010f sa pozrieme na stav podov v namespace \u201cmonitoring\u201d, uvid\u00edme, \u017ee v\u0161etko je nasaden\u00e9:<\/p>\n<pre><code class=\"go\">$ kubectl -n monitoring get pods -l release=loki<\/code><\/pre>\n<p>V\u00fdsledok:<\/p>\n<pre><code class=\"go\">NAME                 READY  STATUS   RESTARTS  AGE\nloki-0               1\/1    Running  0         147m\nloki-promtail-9zjvc  1\/1    Running  0         3h25m\nloki-promtail-f6brf  1\/1    Running  0         11h\nloki-promtail-hdcj7  1\/1    Running  0         3h23m\nloki-promtail-jbqhc  1\/1    Running  0         11h\nloki-promtail-mj642  1\/1    Running  0         62m\nloki-promtail-nm64g  1\/1    Running  0         24m<\/code><\/pre>\n<p>V\u0161etky podi s\u00fa spusten\u00e9. Teraz je \u010das vykona\u0165 nieko\u013eko testov!<\/p>\n<h3>Pripojenie k Grafana<\/h3>\n<p>Aby ste sa mohli pripoji\u0165 k Grafana cez Kubernetes, mus\u00edte otvori\u0165 tunel k jeho podu. Ni\u017e\u0161ie je uveden\u00fd pr\u00edkaz na otvorenie portu 3000 pre pod Grafana:<\/p>\n<pre><code class=\"go\">$ kubectl -n port-forward monitoring svc\/loki-grafana 3000:80<\/code><\/pre>\n<p>\u010eal\u0161\u00edm d\u00f4le\u017eit\u00fdm bodom je potreba obnovi\u0165 heslo administr\u00e1tora Grafana. Heslo sa uchov\u00e1va v tajomstvo <code>loki-grafana<\/code> v poli <code>.data.admin-user<\/code> vo form\u00e1te base64.<\/p>\n<p>Na jeho obnovenie je potrebn\u00e9 vykona\u0165 nasleduj\u00faci pr\u00edkaz:<\/p>\n<pre><code class=\"go\">$ kubectl -n monitoring get secret loki-grafana \n --template '{{index .data \"admin-password\" | base64decode}}'; echo<\/code><\/pre>\n<p>Pou\u017eite toto heslo spolu s predvolen\u00fdm \u00fa\u010dtom spr\u00e1vcu (admin).<\/p>\n<h3>Defin\u00edcia zdroja \u00fadajov Loki v Grafana<\/h3>\n<p>Najprv sa uistite, \u017ee je vytvoren\u00fd zdroj \u00fadajov Loki (Configuration \/ Datasource).<br \/>\nTu je pr\u00edklad:<\/p>\n<p><img decoding=\"async\" alt=\"Loki \u2014 zber logov s vyu\u017eit\u00edm pr\u00edstupu Prometheus\" src=\"\/wp-content\/uploads\/2020\/02\/3b670a4b1a8b4db74b1e1f525fd03129.jpg\" style=\"display:block;margin: 0 auto;\"><br \/>\n<i>Pr\u00edklad nastavenia zdroja \u00fadajov pre Loki<\/i><\/p>\n<p>Kliknut\u00edm na \u201cTest\u201d m\u00f4\u017eete overi\u0165 pripojenie k Loki.<\/p>\n<h3>Vykon\u00e1vame dotazy na Loki<\/h3>\n<p>Teraz prejdite do Grafana do sekcie \u201cExplore\u201d. Pri prij\u00edman\u00ed logov z kontajnerov Loki prid\u00e1va metad\u00e1ta z Kubernetes. Takto je mo\u017en\u00e9 prezera\u0165 logy konkr\u00e9tneho kontajnera.<\/p>\n<p>Napr\u00edklad na v\u00fdber logov kontajnera promtail m\u00f4\u017eete pou\u017ei\u0165 nasleduj\u00faci dotaz: <code>{container_name = \"promtail\"}<\/code>.<br \/>\nTu nezabudnite vybra\u0165 zdroj \u00fadajov Loki.<\/p>\n<p>Tento dotaz vr\u00e1ti aktivitu kontajnerov v nasleduj\u00facom form\u00e1te:<\/p>\n<p><img decoding=\"async\" alt=\"Loki \u2014 zber logov s vyu\u017eit\u00edm pr\u00edstupu Prometheus\" src=\"\/wp-content\/uploads\/2020\/02\/ed2baebd374b9a6242cfc397776fa65f.jpg\" style=\"display:block;margin: 0 auto;\"><br \/>\n<i>V\u00fdsledok dotazu v Grafana <\/i><\/p>\n<h3>Pridanie na dashboard<\/h3>\n<p>Od verzie Grafana 6.4 je mo\u017en\u00e9 umiestni\u0165 inform\u00e1cie o logoch priamo na dashboard. Po tom bude ma\u0165 pou\u017e\u00edvate\u013e mo\u017enos\u0165 r\u00fdchlo prech\u00e1dza\u0165 medzi po\u010dtom dotazov na jeho str\u00e1nke a trasami aplik\u00e1cie.<\/p>\n<p>Ni\u017e\u0161ie je uveden\u00fd pr\u00edklad dashboardu, ktor\u00fd realizuje toto prepojenie:<\/p>\n<p><img decoding=\"async\" alt=\"Loki \u2014 zber logov s vyu\u017eit\u00edm pr\u00edstupu Prometheus\" src=\"\/wp-content\/uploads\/2020\/02\/d76c5345d543579eb3768fcdb0a2567b.jpg\" style=\"display:block;margin: 0 auto;\"><br \/>\n<i>Uk\u00e1\u017eka dashboardu s metrikami Prometheus a logmi Loki<\/i><\/p>\n<h3>Bud\u00facnos\u0165 Loki<\/h3>\n<p>Za\u010dal som pou\u017e\u00edva\u0165 Loki e\u0161te v m\u00e1ji\/j\u00fani s verziou 0.1. Dnes je u\u017e vydan\u00e1 verzia 1 a dokonca aj 1.1 a 1.2.<\/p>\n<p>Treba uzna\u0165, \u017ee verzia 0.1 nebola dostato\u010dne stabiln\u00e1. Ale 0.3 u\u017e vykazovala re\u00e1lne zn\u00e1mky zrelosti a \u010fal\u0161ie verzie (0.4, potom 1.0) len posilnili tento dojem.<\/p>\n<p>Po verzii 1.0.0 u\u017e nem\u00f4\u017ee nikto ma\u0165 ospravedlnenia, aby nepou\u017e\u00edval tento vynikaj\u00faci n\u00e1stroj.<\/p>\n<p>\u010eal\u0161ie vylep\u0161enia by sa mali t\u00fdka\u0165 nie Loki, ale sk\u00f4r jeho integr\u00e1cie s v\u00fdnimo\u010dnou Grafana. Vlastne, v Grafana 6.4 u\u017e existuje dobr\u00e1 integr\u00e1cia s dashboardmi.<\/p>\n<p>Grafana 6.5, ktor\u00e1 bola ned\u00e1vno vydan\u00e1, e\u0161te viac zlep\u0161uje t\u00fato integr\u00e1ciu, automaticky rozpozn\u00e1vaj\u00fac obsah logov vo form\u00e1te JSON.<\/p>\n<p>Ni\u017e\u0161ie v videu je uveden\u00fd mal\u00fd pr\u00edklad tohto mechanizmu:<\/p>\n<p><img decoding=\"async\" alt=\"Loki \u2014 zber logov s vyu\u017eit\u00edm pr\u00edstupu Prometheus\" src=\"\/wp-content\/uploads\/2020\/02\/1e0a5269f21e401f349a35788672aec1.jpg\" style=\"display:block;margin: 0 auto;\"><br \/>\n<i>Pou\u017e\u00edvanie riadkov Loki zobrazen\u00fdch v Grafana<\/i><\/p>\n<p>St\u00e1va sa mo\u017en\u00e9 pou\u017ei\u0165 jedno z pol\u00ed JSON, napr\u00edklad na:<\/p>\n<ul>\n<li>odkaz na extern\u00fd n\u00e1stroj<\/li>\n<li>filtrovanie obsahu logov<\/li>\n<\/ul>\n<p>Napr\u00edklad, m\u00f4\u017eete klikn\u00fa\u0165 na traceId, aby ste pre\u0161li na Zipkin alebo Jaeger.<\/p>\n<p>Tradi\u010dne o\u010dak\u00e1vame va\u0161e koment\u00e1re a poz\u00fdvame v\u00e1s na <noindex><a rel=\"nofollow\" href=\"https:\/\/otus.pw\/P37L\/\">otvoren\u00fd webin\u00e1r<\/a><\/noindex>, kde sa porozpr\u00e1vame o tom, ako sa vyv\u00edjala DevOps-odvetvie po\u010das roku 2019 a prediskutujeme mo\u017en\u00e9 cesty rozvoja na rok 2020.<\/p>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/otus\/blog\/487118\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u0430\u043b\u044e\u0442, \u0445\u0430\u0431\u0440\u043e\u0432\u0447\u0430\u043d\u0435! \u0412 \u043f\u0440\u0435\u0434\u0434\u0432\u0435\u0440\u0438\u0438 \u0441\u0442\u0430\u0440\u0442\u0430 \u043d\u043e\u0432\u043e\u0433\u043e \u043d\u0430\u0431\u043e\u0440\u0430 \u043d\u0430 \u043a\u0443\u0440\u0441 \u00abDevOps \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0438 \u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u044b\u00bb \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u0438\u043b\u0438 \u0434\u043b\u044f \u0432\u0430\u0441 \u043f\u0435\u0440\u0435\u0432\u043e\u0434 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u043e\u0433\u043e \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0430. \u042d\u0442\u0430 \u0441\u0442\u0430\u0442\u044c\u044f \u2014 \u043a\u0440\u0430\u0442\u043a\u043e\u0435 \u0432\u0432\u0435\u0434\u0435\u043d\u0438\u0435 \u0432 Loki. \u041f\u0440\u043e\u0435\u043a\u0442 Loki \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442\u0441\u044f Grafana \u0438 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d \u043d\u0430 \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0441\u0431\u043e\u0440 \u043b\u043e\u0433\u043e\u0432 (\u0441 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u0438\u043b\u0438 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043e\u0432). \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u043c \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u043e\u043c \u0432\u0434\u043e\u0445\u043d\u043e\u0432\u0435\u043d\u0438\u044f \u0434\u043b\u044f Loki \u0431\u044b\u043b Prometheus \u0441 \u0438\u0434\u0435\u0435\u0439 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0435\u0433\u043e \u043f\u043e\u0434\u0445\u043e\u0434\u043e\u0432 \u043a \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044e \u043b\u043e\u0433\u0430\u043c\u0438: [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-56206","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0421\u0430\u043b\u044e\u0442, \u0445\u0430\u0431\u0440\u043e\u0432\u0447\u0430\u043d\u0435!\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/sk\/blog\/administrirovanie\/loki-sbor-logov-ispolzuya-podhod-prometheus\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.4\" \/>\n\t\t<meta property=\"og:locale\" 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