{"id":924,"date":"2021-04-27T10:38:00","date_gmt":"2021-04-27T10:38:00","guid":{"rendered":"https:\/\/dev.sourcecode.sk\/wsczkb\/?post_type=ht_kb&#038;p=924"},"modified":"2021-06-24T10:56:50","modified_gmt":"2021-06-24T08:56:50","slug":"koncepty-a-terminologie-vdc","status":"publish","type":"ht_kb","link":"https:\/\/www.websupport.cz\/podpora\/kb\/koncepty-a-terminologie-vdc\/","title":{"rendered":"Koncepty a terminologie VDC"},"content":{"rendered":"\n<p>Z\u00e1kladn\u00ed koncepty a stavebn\u00ed bloky Virtu\u00e1ln\u00edho datov\u00e9ho centra (VDC). \u010cesk\u00e9 n\u00e1zvy jsou d\u00e1le pou\u017e\u00edvan\u00e9 v dokumentaci, anglick\u00e9 n\u00e1zvy jsou uveden\u00e9 jako reference k Dashboard rozhran\u00ed.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>Availability zone, AZ<\/strong>\u00a0\u2013 Z\u00f3na, ve kter\u00e9 jsou zdroje v\u017edy dostupn\u00e9 nebo nedostupn\u00e9 jako skupina. Z\u00f3na odpov\u00edd\u00e1 konkr\u00e9tn\u00edmu datacentru v konkr\u00e9tn\u00edm m\u011bst\u011b. V\u00edcer\u00e9 z\u00f3ny umo\u017e\u0148uj\u00ed p\u0159izp\u016fsoben\u00ed v\u00fdpo\u010dtov\u00fdch prost\u0159edk\u016f podle geografick\u00fdch pot\u0159eb nebo rozlo\u017een\u00ed rizika mezi v\u00edcer\u00e1 datacentra.<\/li><li><strong>Compute server (Compute Node)<\/strong>\u00a0\u2013 Fyzick\u00fd server na kter\u00e9m jsou spu\u0161t\u011bn\u00e9 virtu\u00e1ln\u00ed servery \u2013 instance.<\/li><li><strong>Firewall pravidla (Security Groups)<\/strong>\u00a0\u2013 Skupiny pravidel, kter\u00e9 definuj\u00ed jak\u00e9 typy komunikace jsou povolen\u00e9 z a do instance.<\/li><li><strong>Flavor<\/strong>\u00a0\u2013 P\u0159edpis prost\u0159edk\u016f, kter\u00e9 zp\u0159\u00edstup\u0148ujeme instanci. Flavor je sdru\u017een\u00e1 definice pro po\u010det procesor\u016f, velikost RAM, kter\u00e9 bude instance vyu\u017e\u00edvat.<\/li><li><strong>Instance (Instance)<\/strong>\u00a0\u2013 Samotn\u00fd virtu\u00e1ln\u00ed server, kter\u00fd se skl\u00e1d\u00e1 ze syst\u00e9mov\u00fdch zdroj\u016f jako vCPU, RAM, IP a diskov\u00fd prostor.<\/li><li><strong>Obraz disku (Image)<\/strong>\u00a0\u2013 Instala\u010dn\u00ed m\u00e9dium s opera\u010dn\u00edm syst\u00e9mem. M\u016f\u017ee m\u00edt v\u00edcero form\u00e1t\u016f \u2013 v\u011bt\u0161inou QCOW2, kter\u00fd nepot\u0159ebuje manu\u00e1ln\u00ed instalaci nebo naopak, ISO kter\u00e9 instala\u010dn\u00ed proceduru vy\u017eaduje. Obraz disku m\u016f\u017eeme vytvo\u0159it v\u00edcer\u00fdmi zp\u016fsoby: st\u00e1hnut\u00edm z URL od poskytovatele, nahr\u00e1n\u00edm lok\u00e1ln\u00edho souboru nebo vytvo\u0159en\u00edm snapshotu existuj\u00edc\u00ed instance.<\/li><li><strong>Pods\u00ed\u0165 (Subnet)<\/strong>\u00a0\u2013 Analogie L3 s\u00ed\u0165ov\u00e9ho segmentu (nap\u0159. IP pods\u00ed\u0165). Je v\u017edy pod\u0159azen\u00e1 s\u00edti. Pods\u00edt\u011b n\u00e1m umo\u017e\u0148uj\u00ed nastavit IP rozsahy pro dynamick\u00e9 p\u0159i\u0159azov\u00e1n\u00ed adres p\u0159es DHCP nebo DNS servery, kter\u00e9 m\u00e1 instance v t\u00e9to s\u00edti pou\u017e\u00edvat.<\/li><li><strong>Serverov\u00e9 skupiny (Server Groups)<\/strong>\u00a0\u2013 Umo\u017e\u0148uj\u00ed definovat politiky um\u00eds\u0165ov\u00e1n\u00ed instanc\u00ed na fyzick\u00fdch serverech. Nap\u0159\u00edklad, kdy\u017e chceme aby byli v\u0161echny webservery na rozd\u00edln\u00fdch fyzick\u00fdch serverech, vytvo\u0159\u00edme Server Group s n\u00e1zvem Webservers s politikou \u201eanti-affinity\u201c. P\u0159i vytv\u00e1\u0159en\u00ed instance ji za\u0159ad\u00edme do serverov\u00e9 skupiny Webservers aby byla vytvo\u0159en\u00e1 na fyzick\u00e9m serveru, kde je\u0161t\u011b \u017e\u00e1dn\u00fd webov\u00fd server neb\u011b\u017e\u00ed.<\/li><li><strong>SSH kl\u00ed\u010de (Key Pairs)<\/strong>\u00a0\u2013 Ve\u0159ejn\u00e9 SSH kl\u00ed\u010de ze kter\u00fdch m\u016f\u017eeme p\u0159i vytv\u00e1\u0159en\u00ed instance vybrat jeden, kter\u00fd se vlo\u017e\u00ed mezi autorizovan\u00e9 kl\u00ed\u010de u\u017eivatele.<\/li><li><strong>S\u00ed\u0165 (Network)<\/strong>\u00a0\u2013 Analogie L2 s\u00ed\u0165ov\u00e9ho segmentu (nap\u0159. Ethernet) ve fyzick\u00e9 infrastruktu\u0159e. Umo\u017e\u0148uje rozd\u011blit komunikaci mezi servery podle \u00fa\u010delu, nap\u0159\u00edklad na komunikaci s backup serverem, komunikaci s Internetem a intern\u00ed komunikaci. Ka\u017ed\u00e1 S\u00ed\u0165 m\u016f\u017ee m\u00edt v\u00edcero Pods\u00edt\u00ed, kter\u00e9 odpov\u00eddaj\u00ed r\u016fzn\u00fdm IP rozsah\u016fm.<\/li><li><strong>S\u00ed\u0165ov\u00e9 rozhran\u00ed (Port)<\/strong>\u00a0\u2013 Virtu\u00e1ln\u00ed s\u00ed\u0165ov\u00fd adapt\u00e9r, p\u0159ipojiteln\u00fd k instanci, kter\u00fd bude v opera\u010dn\u00edm syst\u00e9mu identifikovan\u00fd jako samostatn\u00e1 s\u00ed\u0165ov\u00e1 karta.<\/li><li><strong>Snapshot<\/strong>\u00a0\u2013 Moment\u00e1ln\u00ed obraz disku existuj\u00edc\u00ed instance. Vytvo\u0159en\u00edm snapshotu se ulo\u017e\u00ed sou\u010dasn\u00fd stav disku do obrazu, kter\u00fd m\u016f\u017eeme d\u00e1le pou\u017e\u00edvat na vytv\u00e1\u0159en\u00ed nov\u00fdch instanc\u00ed, nebo na n\u00e1vrat instance do p\u016fvodn\u00edho stavu.<\/li><li><strong>Zdroje (Resources)<\/strong>\u00a0\u2013 Virtualizovan\u00e9 komponenty, kter\u00e9 m\u016f\u017eeme pou\u017e\u00edt samostatn\u011b nebo jako stavebn\u00ed prvky instance. Jde nap\u0159\u00edklad o s\u00ed\u0165ov\u00fd port, Flavor, obraz disku (image) nebo definice firewall pravidel.<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Z\u00e1kladn\u00ed koncepty a stavebn\u00ed bloky Virtu\u00e1ln\u00edho datov\u00e9ho centra (VDC). \u010cesk\u00e9 n\u00e1zvy jsou d\u00e1le pou\u017e\u00edvan\u00e9 v dokumentaci, anglick\u00e9 n\u00e1zvy jsou uveden\u00e9 jako reference k Dashboard rozhran\u00ed. Availability zone, AZ\u00a0\u2013 Z\u00f3na, ve kter\u00e9 jsou zdroje v\u017edy dostupn\u00e9 nebo nedostupn\u00e9 jako skupina. Z\u00f3na odpov\u00edd\u00e1 konkr\u00e9tn\u00edmu datacentru v konkr\u00e9tn\u00edm m\u011bst\u011b. V\u00edcer\u00e9 z\u00f3ny umo\u017e\u0148uj\u00ed p\u0159izp\u016fsoben\u00ed&#8230;<\/p>\n","protected":false},"author":3,"template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[117],"ht-kb-tag":[],"class_list":["post-924","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-vdc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Koncepty a terminologie VDC - Websupport Centrum n\u00e1pov\u011bdy<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.websupport.cz\/podpora\/kb\/koncepty-a-terminologie-vdc\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Koncepty a terminologie VDC - Websupport Centrum n\u00e1pov\u011bdy\" \/>\n<meta property=\"og:description\" content=\"Z\u00e1kladn\u00ed koncepty a stavebn\u00ed bloky Virtu\u00e1ln\u00edho datov\u00e9ho centra (VDC). \u010cesk\u00e9 n\u00e1zvy jsou d\u00e1le pou\u017e\u00edvan\u00e9 v dokumentaci, anglick\u00e9 n\u00e1zvy jsou uveden\u00e9 jako reference k Dashboard rozhran\u00ed. 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