{"id":31752,"date":"2024-11-18T13:57:41","date_gmt":"2024-11-18T13:57:41","guid":{"rendered":"https:\/\/mainstream.eu\/?p=31752"},"modified":"2025-09-18T09:39:44","modified_gmt":"2025-09-18T09:39:44","slug":"kubernetes-ogranicenja-upotrebe-resursa","status":"publish","type":"post","link":"https:\/\/mainstream.eu\/sr\/blog\/kubernetes-ogranicenja-upotrebe-resursa","title":{"rendered":"Ograni\u010denja upotrebe resursa pomo\u0107u Kubernetes-a: Re\u0161avanje ograni\u010denja kapaciteta CPU i memorije primenom ma\u010da sa dve o\u0161trice"},"content":{"rendered":"\n<p>Ukoliko ste ikada radili na razvoju ili odr\u017eavanju aplikacija, mo\u017ee se re\u0107i da ste upoznati sa tim u kojoj je meri Kubernetes te va\u017ene procese promenio nabolje. Jedna od prvih stvari koja nam pada na pamet je sposobnost nametanja ograni\u010denja upotrebe resursa, naro\u010dito kada su u pitanju procesor i memorija. Ova ograni\u010denja mogu za\u0161tititi va\u0161 klaster od preoptere\u0107enja dostupnih resursa, ali ukoliko se ne koriste pametno, potencijalno mogu dovesti do ozbiljnih problema sa performansama sistema. Otkrivanje pravih postavki je veoma va\u017eno za preduze\u0107a koja koriste Kubernetes.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mainstream.eu\/sr\/blog\/kubernetes-ogranicenja-upotrebe-resursa\/#Funkcija_ogranicenja_memorije_i_procesora\" >Funkcija ograni\u010denja memorije i procesora<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mainstream.eu\/sr\/blog\/kubernetes-ogranicenja-upotrebe-resursa\/#Definisanje_preniske_granice_%E2%80%93_kakve_su_posledice\" >Definisanje preniske granice \u2013 kakve su posledice?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mainstream.eu\/sr\/blog\/kubernetes-ogranicenja-upotrebe-resursa\/#Jos_uvek_morate_da_ogranicite_resurse_Sta_bi_trebalo_da_uradite\" >Jo\u0161 uvek morate da ograni\u010dite resurse. \u0160ta bi trebalo da uradite?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mainstream.eu\/sr\/blog\/kubernetes-ogranicenja-upotrebe-resursa\/#Hajde_da_sumiramo\" >Hajde da sumiramo<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Funkcija_ogranicenja_memorije_i_procesora\"><\/span>Funkcija ograni\u010denja memorije i procesora<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Developeri mogu dostaviti zahteve i ograni\u010denja kao dve primarne kategorije specifikacije resursa za kontejnere koje koristi <a href=\"https:\/\/mainstream.eu\/sr\/application-servisi\/kubernetes\/\">Kubernetes<\/a>.<\/p>\n\n\n\n<p>Minimum minimuma resursa koje Kubernetes stavlja na raspolaganje za kontejner se naziva zahtev. Maksimalna potro\u0161nja resursa od strane kontejnera je ograni\u010dena. Takve konfiguracije poma\u017eu u garantovanju ravnomerne raspodele resursa izme\u0111u svih dostupnih aplikacija. Sa druge strane, lo\u0161e definisana ograni\u010denja mogu negativno uticati na performanse aplikacije.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Definisanje_preniske_granice_%E2%80%93_kakve_su_posledice\"><\/span>Definisanje preniske granice \u2013 kakve su posledice?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ukoliko previ\u0161e konzervativno defini\u0161ete ograni\u010denje resursa, morate biti svesni potencijalnih rizika u vezi sa odzivom i stabilno\u0161\u0107u va\u0161e aplikacije. Hajde da pogledamo one najozbiljnije probleme:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ko\u010denje aplikacije<\/h3>\n\n\n\n<p>Preniska ograni\u010denja vezana za procesorske resurse mogu smanjiti procesorski kapacitet aplikacije, \u0161to dovodi do ko\u010denja.\u00a0 Dalje, program nije u stanju da brzo obradi zahteve, pove\u0107ava se latencija i produ\u017eavaju se vremena odziva. U najte\u017eim situacijama, to mo\u017ee dovesti do blokiranja ili padanja aplikacije.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ograni\u010denja memorije<\/h3>\n\n\n\n<p>Prestroga ograni\u010denja memorije mogu dovesti do pojave out-of-memory (OOM) gre\u0161aka (nema dovoljno memorije), \u0161to navodi Kubernetes da ugasi kontejnere koji prema\u0161uju dodeljenu koli\u010dinu memorije. Ovakav prekid naro\u010dito mo\u017ee biti \u0161tetan za aplikacije koja pamte prethodna stanja (Stateful aplikacije) koje se oslanjaju na postojanost podataka. Kada se kontejner ugasi, ne samo \u0161to dolazi do zastoja servisa, ve\u0107 aplikacija tako\u0111e mo\u017ee izgubiti va\u017ene podatke iz RAM memorije (in-memory state), \u0161to dovodi do potencijalne nedoslednosti podataka ili korumpiranih podataka.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1112\" src=\"https:\/\/mainstream.eu\/wp-content\/uploads\/2024\/10\/limits.jpg\" alt=\"\" class=\"wp-image-30988\" srcset=\"https:\/\/mainstream.eu\/wp-content\/uploads\/2024\/10\/limits.jpg 1800w, https:\/\/mainstream.eu\/wp-content\/uploads\/2024\/10\/limits-300x185.jpg 300w, https:\/\/mainstream.eu\/wp-content\/uploads\/2024\/10\/limits-1024x633.jpg 1024w, https:\/\/mainstream.eu\/wp-content\/uploads\/2024\/10\/limits-768x474.jpg 768w, https:\/\/mainstream.eu\/wp-content\/uploads\/2024\/10\/limits-1536x949.jpg 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Umiranje od gladi za resursima<\/h3>\n\n\n\n<p>Stra\u0161no je kao \u0161to zvu\u010di. Kada se vi\u0161e aplikacija takmi\u010di za ograni\u010dene resurse, kriti\u010dni servisi mogu ostati bez kompjuterske snage ili memorije koja im je potrebna, \u0161to dovodi do kaskadnog \u0161irenja problema sa performansama. Ovaj disbalans mo\u017ee dovesti do degradacije va\u017enih procesa, \u0161to dovodi do podrivanja ukupne efikasnosti klastera i ve\u0107eg rizika od nestabilnosti sistema.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Jos_uvek_morate_da_ogranicite_resurse_Sta_bi_trebalo_da_uradite\"><\/span>Jo\u0161 uvek morate da ograni\u010dite resurse. \u0160ta bi trebalo da uradite?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Uzmite u obzir slede\u0107e preporu\u010dene procedure za re\u0161avanje problema koje donose ograni\u010denja upotrebe CPU i memorije:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Obaviti sveobuhvatnu analizu<\/strong>: Ispitati koliko procesorskih i memorijskih resursa koristi va\u0161a aplikacija takva kakva jeste, pre nametanja bilo kakvih ograni\u010denja. Primeniti tehnike pra\u0107enja u cilju prikupljanja podataka za zadati vremenski period, kako biste utvrdili prose\u010dnu potro\u0161nju i obrasce maksimalne upotrebe resursa. <\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Prepoznajte va\u0161e radno optere\u0107enje<\/strong>: Potrebe razli\u010ditih aplikacija za resursima se razlikuju. Na primer, za posao koji podrazumeva puno obrade podataka mo\u017ee biti potrebno mnogo vi\u0161e procesorskih resursa nego \u0161to to zahteva manji veb-server. Prilagodite va\u0161a ograni\u010denja tako da zadovoljite pojedina\u010dne potrebe svake od aplikacija. <\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Obaviti ispitivanje pod optere\u0107enjem (Load Testing)<\/strong>: Kako biste otkrili kako va\u0161a aplikacija reaguje pod pritiskom, obavite probno ispitivanje pod optere\u0107enjem u okru\u017eenju u kojem \u0107e aplikacija biti kori\u0161\u0107ena. To \u0107e vam omogu\u0107iti da podesite adekvatna ograni\u010denja resursa i da garantujete da va\u0161a aplikacija mo\u017ee iza\u0107i na kraj sa predvi\u0111enim nivoima saobra\u0107aja bez problema sa performansama. <\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u010cesto preispitujte i prilago\u0111avajte<\/strong>: A\u017euriranja, pikovi u korisni\u010dkom saobra\u0107aju, ili modifikacije u dizajnu aplikacije mogu uticati na to koliko se resursa tro\u0161i vremenom. \u010cesto preispitujte ograni\u010denja koja ste definisali i prilago\u0111avajte ih kao odgovor na izmenjene potrebe za resursima i trendove upotrebe aplikacije.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Zahteve za resursima koristite pametno<\/strong>: Svojim aplikacijama mo\u017eete pru\u017eiti za\u0161titu tako \u0161to \u0107ete definisati ograni\u010denja i odgovaraju\u0107e zahteve. U cilju spre\u010davanja preoptere\u0107enja resursa, to garantuje da \u0107e Kubernetes dodeliti neophodne resurse uz odr\u017eavanje gornje granice. <\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img decoding=\"async\" src=\"https:\/\/mainstream.eu\/wp-content\/uploads\/2024\/10\/limits-1-1.svg\" alt=\"\" class=\"wp-image-30996\" style=\"width:835px;height:auto\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Hajde_da_sumiramo\"><\/span>Hajde da sumiramo<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Iako ograni\u010denja upotrebe procesorskih i memorijskih resursa koje omogu\u0107uje Kubernetes mogu olak\u0161ati odr\u017eavanje izbalansiranog i efikasnog klastera, ta ograni\u010denja se moraju pa\u017eljivo koristiti. Odvojite potrebno vreme za pa\u017eljivu procenu koliko resursa va\u0161 program koristi pre uspostavljanja bilo kakvih ograni\u010denja. Razumevanje jedinstvenih zahteva va\u0161ih aplikacija i pode\u0161avanje odgovaraju\u0107ih ograni\u010denja vam mo\u017ee pomo\u0107i u izbegavanju ko\u010denja, garantovanju maksimalnih performansi i razvoju va\u0161eg <strong><a href=\"https:\/\/mainstream.eu\/sr\/application-servisi\/kubernetes\/\">Kubernetes okru\u017eenja<\/a><\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kubernetes CPU and memory limits are essential for managing resources, but setting them too low can lead to throttling&#8230;<\/p>\n","protected":false},"author":4,"featured_media":31011,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[347,349],"tags":[],"class_list":["post-31752","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kubernetes","category-kubernetes-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - 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