{"id":35382,"date":"2026-01-07T10:23:41","date_gmt":"2026-01-07T09:23:41","guid":{"rendered":"https:\/\/www.websupport.sk\/blog\/?p=35382"},"modified":"2026-01-07T10:23:44","modified_gmt":"2026-01-07T09:23:44","slug":"day-0-day-1-day-2","status":"publish","type":"post","link":"https:\/\/www.websupport.sk\/blog\/2026\/01\/day-0-day-1-day-2\/","title":{"rendered":"Day 0, Day 1, Day 2: Pre\u010do v\u00e1s pr\u00e1ve ten posledn\u00fd de\u0148 dobehne"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\"><b>Doba \u010d\u00edtania:<\/b><\/span> <span class=\"rt-time\"> 6<\/span> <span class=\"rt-label rt-postfix\">min.<\/span><\/span>\n<p>Trojica pojmov <strong>Day 0, Day 1, Day 2<\/strong> sa pomerne stabilne udom\u00e1cnila v slovn\u00edku IT profesion\u00e1lov. P\u00f4vodne prich\u00e1dzaj\u00fa z DevOps a cloud-native sveta, no ve\u013emi dobre sa hodia aj pre \u201etradi\u010dn\u00fdch\u201c adminov, ktor\u00ed spravuj\u00fa dedikovan\u00e9 servery, VPS alebo men\u0161iu firemn\u00fa infra\u0161trukt\u00faru. Pom\u00e1haj\u00fa pomenova\u0165 tri k\u013e\u00fa\u010dov\u00e9 f\u00e1zy \u017eivota ka\u017edej slu\u017eby: od n\u00e1padu cez nasadenie a\u017e po nekone\u010dn\u00fa operat\u00edvu.<\/p>\n\n\n\n<p>V praxi sa be\u017ene deje, \u017ee mnoh\u00ed z n\u00e1s sa pritom radi zamiluj\u00fa do <strong>Day 0<\/strong> &#8211; pl\u00e1novania a vym\u00fd\u0161\u013eania. Ve\u013ea energie vieme da\u0165 aj do <strong>Day 1<\/strong> &#8211; h\u013eadania n\u00e1strojov, ako elegantne a automatizovane nasadi\u0165 syst\u00e9m. No z dlhodob\u00e9ho h\u013eadiska rozhoduje hlavne <strong>Day 2<\/strong>. To je t\u00e1 najdlh\u0161ia a najd\u00f4le\u017eitej\u0161ia \u010das\u0165 &#8211; ka\u017edodenn\u00e1 prev\u00e1dzka.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-larger-font-size\">Day 0 &#8211; Dizajn, pl\u00e1novanie, rozhodovanie<\/h2>\n\n\n\n<p>Day 0 je v\u0161etko, \u010do sa deje e\u0161te predt\u00fdm, ne\u017e v\u00f4bec existuje server, kontajner \u010di prv\u00fd deployment. Je to f\u00e1za, ke\u010f sa definuj\u00fa ciele projektu, rozm\u00fd\u0161\u013ea sa nad architekt\u00farou a rozhoduje sa, ak\u00e9 technol\u00f3gie a rie\u0161enia sa pou\u017eij\u00fa. Na papieri (alebo v Notion, Confluence a pod.) vznik\u00e1 obraz toho, \u010do chceme postavi\u0165, pre koho to bude a ak\u00e9 s\u00fa o\u010dak\u00e1vania na v\u00fdkon, dostupnos\u0165 \u010di bezpe\u010dnos\u0165.<\/p>\n\n\n\n<p>Tu sa rodia odpovede na ot\u00e1zky typu: ak\u00fa aplik\u00e1ciu vlastne staviam, ko\u013eko pou\u017e\u00edvate\u013eov m\u00e1 zvl\u00e1dnu\u0165, \u010do sa stane pri v\u00fdpadku, kde bud\u00fa ulo\u017een\u00e9 d\u00e1ta a ako ich budem z\u00e1lohova\u0165. A rovnako d\u00f4le\u017eit\u00e9: ak\u00e9 limity m\u00e1me &#8211; \u010dasov\u00e9, finan\u010dn\u00e9, technologick\u00e9.<\/p>\n\n\n\n<p>Day 0 je ob\u013e\u00faben\u00fd aj preto, \u017ee je pln\u00fd mo\u017enost\u00ed a e\u0161te relat\u00edvne m\u00e1lo probl\u00e9mov. Ale pr\u00e1ve tu sa rozhoduje, \u010di bude cel\u00fd zvy\u0161ok \u017eivota aplik\u00e1cie zvl\u00e1dnute\u013en\u00fd, alebo v\u00e1s o p\u00e1r mesiacov \u010dak\u00e1 syst\u00e9m, ktor\u00fd sa s\u00edce nejako rozbehol, ale \u0165a\u017eko udr\u017euje a v\u0161etko v \u0148om bol\u00ed.<\/p>\n\n\n\n<p>Day 0 m\u00f4\u017eu by\u0165 nekone\u010dn\u00e9 debaty t\u00edmu. Od jednoduch\u00e9ho servera a\u017e po stavanie raketopl\u00e1nu.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-larger-font-size\">Day 1 &#8211; Nasadenie a prv\u00e9 spustenie<\/h2>\n\n\n\n<p>Day 1 je ten de\u0148, ke\u010f prech\u00e1dzate z te\u00f3rie do praxe. Beriete veci, ktor\u00e9 ste vymysleli v Day 0, a men\u00edte ich na be\u017eiaci syst\u00e9m. V praxi to znamen\u00e1 pripravova\u0165 infra\u0161trukt\u00faru, in\u0161talova\u0165 slu\u017eby, nastavova\u0165 siete, datab\u00e1zy, DNS, zabezpe\u010denie a nakoniec samotn\u00fa aplik\u00e1ciu.<\/p>\n\n\n\n<p>Je to f\u00e1za, ktor\u00fa si mnoh\u00ed u\u017e\u00edvaj\u00fa \u2013 nie\u010do nov\u00e9 sa rozbieha, be\u017eia prv\u00e9 testy, zrazu vidno v\u00fdsledok. Prich\u00e1dzaj\u00fa na rad skripty, CI\/CD pipeline, Infrastructure as Code, kontajnery, mo\u017eno Kubernetes, automatizovan\u00e9 deploye. Ve\u013ea energie ide do toho, aby nasadenie bolo \u010do naj\u010distej\u0161ie, opakovate\u013en\u00e9 a \u201cna klik\u201d.<\/p>\n\n\n\n<p>Day 1 \u010dasto pri\u0165ahuje aj <em>love of tools<\/em> &#8211; \u010dlovek sk\u00fa\u0161a nov\u00e9 deploy n\u00e1stroje, nov\u00e9 orchestr\u00e1cie, nov\u00e9 sp\u00f4soby, ako si u\u013eah\u010di\u0165 \u017eivot. A je to super. Len\u017ee pr\u00e1ve tu sa d\u00e1 \u013eahko zabudn\u00fa\u0165 na to, \u017ee nasaden\u00edm sa misia nekon\u010d\u00ed. V skuto\u010dnosti \u0148ou len za\u010d\u00edna \u010fal\u0161ia, ove\u013ea dlh\u0161ia kapitola.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-larger-font-size\">Day 2 &#8211; Nekone\u010dn\u00e1 operat\u00edva<\/h2>\n\n\n\n<p>Day 2 sa za\u010d\u00edna vo chv\u00edli, ke\u010f aplik\u00e1cia be\u017e\u00ed v produkcii a pou\u017e\u00edvaj\u00fa ju re\u00e1lni \u013eudia. V\u0161etko je nasaden\u00e9, DNS smeruje, prv\u00e9 requesty chodia. A od tohto momentu sa v\u00e1\u0161 \u017eivot men\u00ed na vari\u00e1ciu filmu <strong>Na Hromnice o de\u0148 viac<\/strong>.<\/p>\n\n\n\n<p>Ka\u017ed\u00fd de\u0148 sa toti\u017e bud\u00edte do ve\u013emi podobn\u00e9ho scen\u00e1ra: treba skontrolova\u0165 monitoring, vyrie\u0161i\u0165 alerty, pozrie\u0165 sa, pre\u010do jedna slu\u017eba z ni\u010doho ni\u010d zhltla viac RAMky, pre\u010do sa spr\u00e1va divne datab\u00e1za, \u010di sa podarili z\u00e1lohy, \u010di sa obnovil certifik\u00e1t, pre\u010do pou\u017e\u00edvate\u013eom z nejakej geolok\u00e1cie zrazu v\u0161etko be\u017e\u00ed pomal\u0161ie\u2026 A ke\u010f to vyrie\u0161ite, zajtra pr\u00eddu nov\u00e9 spr\u00e1vy, nov\u00e9 tikety, nov\u00e9 bugy a nov\u00e9 n\u00e1pady, ktor\u00e9 treba nasadi\u0165.<\/p>\n\n\n\n<p>Day 2 je <strong>nekone\u010dn\u00e1 operat\u00edva<\/strong>. Do tejto f\u00e1zy patr\u00ed monitoring a alertovanie, pravideln\u00e9 aktualiz\u00e1cie a z\u00e1platy, pl\u00e1novan\u00e9 odst\u00e1vky, incident management, z\u00e1lohovanie a testovanie obnovy, \u0161k\u00e1lovanie pod\u013ea potreby, ale aj komunik\u00e1cia so z\u00e1kazn\u00edkmi \u010di intern\u00fdm biznisom. Z technick\u00e9ho h\u013eadiska je to s\u00e9ria opakuj\u00facich sa cyklov: pozorujem (\u010do sa deje), vyhodnocujem (\u010di je to probl\u00e9m), rozhodujem (\u010do s t\u00fdm) a kon\u00e1m (zmena konfigur\u00e1cie, zv\u00fd\u0161enie kapacity, oprava bugov, rollback verzie\u2026). A tak st\u00e1le dokola.<\/p>\n\n\n\n<p>Pr\u00e1ve tu sa rozhoduje o skuto\u010dnej kvalite slu\u017eby. Ak Day 2 zanedb\u00e1te, aj najkraj\u0161\u00ed n\u00e1vrh a naj\u010distej\u0161ie nasadenie sa \u010dasom rozpadn\u00fa pod tlakom reality: viac pou\u017e\u00edvate\u013eov, viac d\u00e1t, viac z\u00e1vislost\u00ed, viac aktualiz\u00e1ci\u00ed.<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1100\" height=\"733\" src=\"https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2026\/01\/22-days-1100x733.png\" alt=\"Day 0, day 1, day2\" class=\"wp-image-35412\" srcset=\"https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2026\/01\/22-days-1100x733.png 1100w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2026\/01\/22-days-300x200.png 300w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2026\/01\/22-days-768x512.png 768w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2026\/01\/22-days-1200x800.png 1200w, https:\/\/www.websupport.sk\/blog\/app\/uploads\/sites\/2\/2026\/01\/22-days.png 1536w\" sizes=\"auto, (max-width: 1100px) 100vw, 1100px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-larger-font-size\"><strong>Pre\u010do myslie\u0165 na Day 2 u\u017e od Day 0<\/strong>?<\/h2>\n\n\n\n<p>K\u013e\u00fa\u010dov\u00e1 my\u0161lienka je jednoduch\u00e1: <strong>Day 2 neza\u010d\u00edna a\u017e po nasaden\u00ed, ale u\u017e pri pl\u00e1novan\u00ed<\/strong>. Ke\u010f pri Day 0 rie\u0161ite architekt\u00faru, oplat\u00ed sa z\u00e1rove\u0148 polo\u017ei\u0165 ot\u00e1zky typu: ako budeme ten syst\u00e9m monitorova\u0165; kde budeme logova\u0165; ako r\u00fdchlo vieme obnovi\u0165 d\u00e1ta; kto m\u00e1 na starosti incidenty; ako bude vyzera\u0165 \u0161k\u00e1lovanie; \u010do sprav\u00edme, ke\u010f sa z\u00e1\u0165a\u017e zdvojn\u00e1sob\u00ed.<\/p>\n\n\n\n<p>A v Day 1, pri nasadzovan\u00ed, sa oplat\u00ed rovno zavies\u0165 aspo\u0148 z\u00e1kladn\u00e9 prvky Day 2: nastavi\u0165 monitoring hne\u010f od za\u010diatku; ma\u0165 pripraven\u00e9 z\u00e1lohy a test obnovy; ma\u0165 dohody v t\u00edme, kto \u010do rie\u0161i pri probl\u00e9moch; ma\u0165 zdokumentovan\u00fd postup, ako sa syst\u00e9m nasadzuje a ako sa d\u00e1 vr\u00e1ti\u0165 sp\u00e4\u0165. To v\u0161etko v\u00fdrazne zni\u017euje stres v momente, ke\u010f sa nie\u010do pokaz\u00ed &#8211; a ono sa <em>v\u017edy<\/em> nie\u010do sk\u00f4r \u010di nesk\u00f4r pokaz\u00ed.<\/p>\n\n\n\n<p>Firmy a t\u00edmy, ktor\u00e9 Day 2 ignoruj\u00fa, to v\u00e4\u010d\u0161inou spoznaj\u00fa ve\u013emi r\u00fdchlo: po p\u00e1r mesiacoch sa pl\u00e1caj\u00fa v manu\u00e1lnych z\u00e1sahoch, syst\u00e9m je pln\u00fd \u201edo\u010dasn\u00fdch rie\u0161en\u00ed\u201c, ktor\u00e9 s\u00fa tam u\u017e rok, a ka\u017ed\u00fd v\u00e4\u010d\u0161\u00ed incident znamen\u00e1 no\u010dn\u00e9 smeny a improviz\u00e1ciu. Naopak, t\u00ed, ktor\u00ed s Day 2 r\u00e1tali od za\u010diatku, s\u00edce maj\u00fa st\u00e1le \u010do robi\u0165, ale ich <em>Na Hromnice o de\u0148 viac<\/em> je o dos\u0165 pokojnej\u0161\u00ed film.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>TIP: <\/strong>Websupport m\u00e1 za sebou dlh\u00e9 roky sk\u00fasenost\u00ed so spr\u00e1vou serverov \u2013 od mal\u00fdch projektov a\u017e po n\u00e1ro\u010dn\u00e9 produk\u010dn\u00e9 rie\u0161enia. Pozn\u00e1me typick\u00e9 probl\u00e9my, ne\u010dakan\u00e9 v\u00fdzvy aj to, \u010do v\u0161etko obn\u00e1\u0161a spo\u013eahliv\u00e1 prev\u00e1dzka. Preto sa s rovnakou starostlivos\u0165ou a d\u00f4slednos\u0165ou <a href=\"https:\/\/www.websupport.sk\/servery\/sprava\/\" target=\"_blank\" rel=\"noreferrer noopener\">postar\u00e1me aj o v\u00e1\u0161 server<\/a>. Zabezpe\u010d\u00edme jeho r\u00fdchlos\u0165, bezpe\u010dnos\u0165, dostupnos\u0165 aj pravideln\u00fa \u00fadr\u017ebu, aby ste sa vy mohli s\u00fastredi\u0165 na svoj biznis a nie na technick\u00fa operat\u00edvu.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading has-larger-font-size\"><strong>Zhrnutie<\/strong><\/h2>\n\n\n\n<p>Day 0 v\u00e1m d\u00e1va v\u00edziu a smer. Day 1 v\u00e1m d\u00e1va prv\u00fd vidite\u013en\u00fd v\u00fdsledok \u2013 be\u017eiacu slu\u017ebu. Ale a\u017e <strong>Day 2 z toho rob\u00ed dlhodob\u00fa hodnotu<\/strong>, ktor\u00fa m\u00f4\u017eu va\u0161i klienti spo\u013eahlivo pou\u017e\u00edva\u0165.<\/p>\n\n\n\n<p>A ke\u010f nabud\u00face budete pozera\u0165 <strong>Na Hromnice o de\u0148 viac<\/strong>, mo\u017eno si spomeniete, \u017ee Bill Murray v tom filme vlastne neza\u017e\u00edva ni\u010d in\u00e9 ako klasick\u00fd Day 2: ka\u017ed\u00fd de\u0148 tie ist\u00e9 probl\u00e9my, ale s ka\u017ed\u00fdm opakovan\u00edm sa to d\u00e1 zvl\u00e1dnu\u0165 o k\u00fasok lep\u0161ie. Ak dnes navrhujete nov\u00fd syst\u00e9m, sk\u00faste si pri ka\u017edom rozhodnut\u00ed polo\u017ei\u0165 ot\u00e1zku: <em>Ako sa mi toto bude spravova\u0165 o rok v Day 2?<\/em> \u010casto zist\u00edte, \u017ee mierne zjednodu\u0161enie architekt\u00fary, trochu viac automatiz\u00e1cie alebo lep\u0161\u00ed monitoring s\u00fa invest\u00edcie, ktor\u00e9 sa v\u00e1m vr\u00e1tia pri prvom v\u00e4\u010d\u0161om probl\u00e9me.<\/p>\n\n\n\n<p><em>Vypo\u010dujte si na z\u00e1ver podcast o tom, ako testova\u0165 odolnos\u0165 \u013eud\u00ed vo\u010di phishingu<\/em>:<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Myslite ako hacker! (Pavel Mat\u011bj\u00ed\u010dek a.k.a. Spajk, BOIT)\" width=\"580\" height=\"326\" src=\"https:\/\/www.youtube.com\/embed\/koaBD7a3t7A?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trojica pojmov Day 0, Day 1, Day 2 sa pomerne stabilne udom\u00e1cnila v slovn\u00edku IT profesion\u00e1lov. P\u00f4vodne prich\u00e1dzaj\u00fa z DevOps a cloud-native sveta, no ve\u013emi dobre sa hodia aj pre \u201etradi\u010dn\u00fdch\u201c adminov, ktor\u00ed spravuj\u00fa dedikovan\u00e9 servery, VPS alebo men\u0161iu firemn\u00fa infra\u0161trukt\u00faru. Pom\u00e1haj\u00fa pomenova\u0165 tri k\u013e\u00fa\u010dov\u00e9 f\u00e1zy \u017eivota ka\u017edej slu\u017eby: od n\u00e1padu cez nasadenie a\u017e po [&hellip;]<\/p>\n","protected":false},"author":105,"featured_media":35424,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2858,8],"tags":[155,3960,204,3951,3323,3948,747],"class_list":["post-35382","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-profesional","category-tipy-a-triky","tag-cloud","tag-day-2","tag-devops","tag-infrastruktura-2","tag-monitoring","tag-produkcia","tag-server"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Day 0, Day 1, Day 2: Realita IT prev\u00e1dzky - Websupport blog<\/title>\n<meta name=\"description\" content=\"\u010co znamenaj\u00fa Day 0, Day 1 a Day 2 v IT svete a pre\u010do je prev\u00e1dzka naj\u0165a\u017e\u0161ia \u010das\u0165? 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