{"id":54989,"date":"2014-06-02T12:29:36","date_gmt":"2014-06-02T10:29:36","guid":{"rendered":"https:\/\/blog.wedos.cz\/?p=54989"},"modified":"2021-01-13T12:40:52","modified_gmt":"2021-01-13T11:40:52","slug":"murphyho-zakony-funguji-aneb-vse-co-nas-nezabije-tak-nas-posili","status":"publish","type":"post","link":"https:\/\/blog.wedos.com\/cs\/murphyho-zakony-funguji-aneb-vse-co-nas-nezabije-tak-nas-posili","title":{"rendered":"Murphyho z\u00e1kony funguj\u00ed aneb v\u0161e, co n\u00e1s nezabije, tak n\u00e1s pos\u00edl\u00ed"},"content":{"rendered":"\n

P\u0159ed deseti dny se u n\u00e1s stala velk\u00e1 nep\u0159\u00edjemnost. M\u011bli jsme probl\u00e9my s nap\u00e1jen\u00edm a t\u00edm do\u0161lo ke komplikac\u00edm p\u0159i poskytov\u00e1n\u00ed slu\u017eeb na\u0161im z\u00e1kazn\u00edk\u016fm. <\/p>\n\n\n\n\n\n\n\n

Tento \u010dl\u00e1nek nap\u00ed\u0161u jako zakladatel, p\u0159edseda p\u0159edstavenstva a v\u011bt\u0161inov\u00fd vlastn\u00edk spole\u010dnosti WEDOS Internet, a.s., tedy jako Josef Grill. Nen\u00ed to n\u011bjak\u00e9 ofici\u00e1ln\u00ed vyj\u00e1d\u0159en\u00ed<\/a>, proto\u017ee to jsme ji\u017e zve\u0159ejnili p\u0159ed t\u00fddnem<\/a>, ale sp\u00ed\u0161e reakce na celou situaci, kterou jsme museli p\u0159ed n\u011bkolika dny \u0159e\u0161it. <\/p>\n\n\n\n

Omluva v\u0161em z\u00e1kazn\u00edk\u016fm<\/h2>\n\n\n\n

Nejprve se je\u0161t\u011b jednou velmi omlouv\u00e1m v\u0161em na\u0161im klient\u016fm. <\/strong><\/p>\n\n\n\n

Jsem si naprosto v\u011bdom z\u00e1va\u017enosti cel\u00e9 situace a probl\u00e9mu, kter\u00fd vznikl a dovol\u00edm si p\u00e1r v\u011bc\u00ed je\u0161t\u011b dovysv\u011btlit.<\/p>\n\n\n\n

WEDOS je na trhu necel\u00e9 4 roky a podobn\u00fd probl\u00e9m se n\u00e1m stal prakticky poprv\u00e9, respektive probl\u00e9m s dopadem na v\u0161echny slu\u017eby sou\u010dasn\u011b se n\u00e1m nestal v\u00edce ne\u017e 2,5 roku. J\u00e1 s\u00e1m m\u00e1m zku\u0161enosti s hostingem p\u0159es 17 let, p\u0159es 13 let s provozov\u00e1n\u00edm vlastn\u00edho datacentra a podobnou situaci jsem neza\u017eil a pevn\u011b douf\u00e1m, \u017ee ji\u017e neza\u017eiji. Jednak statisticky je to t\u00e9m\u011b\u0159 vylou\u010den\u00e9, abych se toho do\u017eil a jednak se z cel\u00e9 situace pou\u010d\u00edme tak, aby se to neopakovalo.<\/p>\n\n\n\n

Omluvenka<\/h2>\n\n\n\n

V\u0161em klient\u016fm nastav\u00edme t\u00fdden zdarma u v\u0161ech slu\u017eeb<\/strong> (tedy krom\u011b dom\u00e9n, kde to nen\u00ed mo\u017en\u00e9). Ud\u011bl\u00e1me v pr\u016fb\u011bhu \u010dervna, proto\u017ee n\u00e1\u0161 syst\u00e9m nic takov\u00e9ho neum\u00ed a tak to mus\u00edme doprogramovat. Pros\u00edme tedy o strpen\u00ed.  Nen\u00ed pot\u0159eba n\u00e1s o nic \u017e\u00e1dat.<\/p>\n\n\n\n

U klient\u016f, kte\u0159\u00ed maj\u00ed speci\u00e1ln\u00ed dohody ohledn\u011b dostupnosti nebo slu\u017eby se zv\u00fd\u0161enou dostupnost\u00ed, budeme \u0159e\u0161it situaci individu\u00e1ln\u011b a je pot\u0159eba n\u00e1s kontaktovat.<\/strong><\/p>\n\n\n\n

Chcete v\u011bd\u011bt jak si klient\u016f v\u00e1\u017e\u00edme? <\/strong>Tak pro informaci dod\u00e1m, \u017ee poskytnut\u00ed t\u00fddne zdarma pro n\u00e1s znamen\u00e1 o cca 1,5 milionu korun ni\u017e\u0161\u00ed p\u0159\u00edjmy. Tento n\u00e1\u0161 vst\u0159\u00edcn\u00fd krok jsme ud\u011blali pr\u00e1v\u011b proto, \u017ee si klient\u016f v\u00e1\u017e\u00edme. Podle smluvn\u00edch podm\u00ednek bychom se m\u011bli pohybovat s n\u00e1hradami v\u00fdrazn\u011b ni\u017e\u0161\u00edmi a ekonomicky by to pro n\u00e1s nic neznamanalo (\u0159\u00e1dov\u011b des\u00edtky tis\u00edc korun). Klient\u016f si v\u00e1\u017e\u00edme a tak jsme si dali sami sob\u011b velmi p\u0159\u00edsn\u00fd (a drah\u00fd) trest.<\/p>\n\n\n\n

K tomu jsme v minul\u00e9m t\u00fddnu objednali novou UPS (za v\u00edce ne\u017e 500 tis\u00edc korun), kter\u00e1 k n\u00e1m ji\u017e v sobotu dorazila z Francie a je ji\u017e v provozu (a nahradila po\u0161kozenou star\u0161\u00ed UPS). Viz fotogalerie n\u00ed\u017ee.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n

Jsem velmi r\u00e1d, \u017ee n\u00e1m v\u011b\u0159\u00edte. D\u011bkuji.<\/h2>\n\n\n\n

A\u010dkoliv v mnoha diskuz\u00edch zazn\u011blo, \u017ee se z\u00e1kazn\u00edci od n\u00e1s st\u011bhuj\u00ed, tak to v\u011bt\u0161inou bylo od anonymn\u00edch p\u0159esp\u011bvovatel\u016f a tedy kritik\u016f, kte\u0159\u00ed u n\u00e1s nehostuj\u00ed. Do dne\u0161n\u00edho dne v\u00edm pouze o jednotk\u00e1ch z\u00e1kazn\u00edk\u016f, kte\u0159\u00ed od n\u00e1s sv\u016fj web odst\u011bhovali. Naopak jste n\u00e1m v diskuz\u00edch vyj\u00e1d\u0159ili silnou podporu a pokud n\u00e1s n\u011bkdo podporoval, tak byl prakticky v\u017edy podeps\u00e1n a napsal i sv\u016fj web. Za tuto podporu moc d\u011bkujeme a moc si toho v\u00e1\u017e\u00edme.<\/strong><\/p>\n\n\n\n

O tom, kdo tedy psal „anti“wedos p\u0159\u00edsp\u011bvky si m\u016f\u017eeme myslet sv\u00e9… Grafy v\u0161ak ukazuj\u00ed, \u017ee n\u00e1m z\u00e1kazn\u00edci v\u011b\u0159\u00ed a to je podstatn\u00e9.<\/strong><\/p>\n\n\n\n

Moje (ne)p\u0159\u00edtomnost aneb Murphyho z\u00e1kony funguj\u00ed.<\/h2>\n\n\n\n

V hostingu d\u011bl\u00e1m 17 let (v kv\u011btnu to p\u0159esn\u011b tak bylo). Po celou dobu jsem v\u017edy m\u011bl u sebe sv\u016fj notebook a v\u017edy jsem cestoval podle toho, abych m\u011bl p\u0159\u00edstup k internetu. I na cest\u00e1ch jsem pracoval a v\u0161e vy\u0159izoval. Poprv\u00e9 za 17 let, jsem jel na zahrani\u010dn\u00ed cestu bez notebooku a s omezen\u00fdm p\u0159ipojen\u00edm k internetu. A samoz\u0159ejm\u011b, \u017ee „to“ p\u0159i\u0161lo… <\/p>\n\n\n\n

B\u011bhem p\u00e1te\u010dn\u00edho odpoledne a sobotn\u00edho dopoledne jsem vy\u0159\u00eddil celkem p\u0159es 450 telefonn\u00edch hovor\u016f, kdy jsem komunikoval s kolegy, z\u00e1kazn\u00edky a dodavateli, abychom celou v\u011bc co nejrychleji vy\u0159e\u0161ili.<\/p>\n\n\n\n

Co byl hlavn\u00ed probl\u00e9m aneb pro\u010d jsme nekomunikovali<\/h2>\n\n\n\n

Technicky jsme probl\u00e9my ji\u017e popsali v jin\u00e9m \u010dl\u00e1nku. R\u00e1d bych se v\u0161ak v\u011bnoval vysv\u011btlen\u00ed cel\u00e9 situace z hlediska toho, \u017ee jsme omezen\u011b komunikovali.<\/p>\n\n\n\n

V\u0161ichni, kte\u0159\u00ed n\u00e1s znaj\u00ed moc dob\u0159e v\u011bd\u00ed, \u017ee u n\u00e1s nic netaj\u00edme. Tak\u017ee jsme ur\u010dit\u011b netajili ani tuto situaci a ani jak\u00e9koliv p\u0159\u00ed\u010diny. Bohu\u017eel se p\u0159ihodilo tolik n\u00e1hod, \u017ee to celou situaci velmi zkomplikovalo a na\u0161e komunikace nebyla optim\u00e1ln\u00ed.<\/strong><\/p>\n\n\n\n

Probl\u00e9m \u010d\u00edslo 1 – technick\u00fd<\/h3>\n\n\n\n

Nejv\u011bt\u0161\u00ed probl\u00e9m v komunikaci byl zp\u016fsoben t\u00edm, \u017ee po p\u00e1te\u010dn\u00edm v\u00fdpadku do\u0161lo k po\u0161kozen\u00ed obou firewall\u016f pro na\u0161e kancel\u00e1\u0159e a t\u00edm jsme m\u011bli v\u0161echny pracovn\u00edky „od\u0159\u00edznut\u00e9“ od internetu na n\u011bkolik hodin, ne\u017e jsme zajistili jin\u00fd (t\u0159et\u00ed) n\u00e1hradn\u00ed firewall, kter\u00fd bylo nutn\u00e9 dopravit k n\u00e1m.T\u00edm vznikla pom\u011brn\u011b dlouh\u00e1 prodleva v komunikaci.<\/strong><\/p>\n\n\n\n

Probl\u00e9m \u010d\u00edslo 2 – bezpe\u010dnostn\u00ed nastaven\u00ed<\/h3>\n\n\n\n

V\u0161echny v\u011bci jsou u n\u00e1s p\u0159\u00edstupn\u00e9 jen z na\u0161ich kancel\u00e1\u0159\u00ed a nem\u00e1me p\u0159\u00edstup do syst\u00e9mu odjinud, ne\u017e z na\u0161ich kancel\u00e1\u0159\u00ed po speci\u00e1ln\u00edch kabelech a p\u0159es speci\u00e1n\u00ed firewally. Vzhledem k po\u0161kozen\u00ed obou firewall\u016f jsme nem\u011bli mo\u017enost nijak jinak komunikovat s klienty a opravovat n\u011bkter\u00e9 nefunk\u010dn\u00ed slu\u017eby <\/strong>(jednalo se o n\u011bkolik server\u016f).<\/p>\n\n\n\n

Bohu\u017eel na\u0161e bezpe\u010dnostn\u00ed opat\u0159en\u00ed jsou natolik p\u0159\u00edsn\u00e1, \u017ee nebylo mo\u017en\u00e9 situaci \u0159e\u0161it jinak.<\/p>\n\n\n\n

Probl\u00e9m \u010d\u00edslo 3 – organiza\u010dn\u00ed a lidsk\u00fd<\/h3>\n\n\n\n

M\u016f\u017eete nam\u00edtnout, \u017ee jsme mohli napsat v\u00edc na soci\u00e1ln\u00ed s\u00edt\u011b. Ano, m\u00e1te pravdu, ale v kancel\u00e1\u0159\u00edch jsme nem\u011bli p\u0159ipojen\u00ed k internetu a z bezpe\u010dnostn\u00edch d\u016fvod\u016f jsme m\u011bli v\u0161e omezen\u00e9 pouze na na\u0161i s\u00ed\u0165 a na\u0161e PC. K tomu je nutn\u00e9 poznamenat, \u017ee p\u0159\u00edstup k firmn\u00edm \u00fa\u010dt\u016fm na soci\u00e1ln\u00edch s\u00edt\u00edch maj\u00ed 2-3 lid\u00e9 a z nich\u017e jeden byl mimo \u010cR a dal\u0161\u00ed uv\u00edzl bez p\u0159ipojen\u00ed v kancel\u00e1\u0159i.<\/p>\n\n\n\n

Po zprovozn\u011bn\u00ed v\u0161e ji\u017e bylo v po\u0159\u00e1dku. Jen kolegov\u00e9 se trochu b\u00e1li reagovat na n\u011bkter\u00e9 p\u0159\u00edsp\u011bvky, proto\u017ee v prvn\u00edm okam\u017eiku ani nev\u011bd\u011bli, co se p\u0159esn\u011b d\u011bje za probl\u00e9m a tak se ob\u00e1vali zve\u0159ejn\u00ed nep\u0159esn\u00e9 informace. Z\u00e1rove\u0148 jsme maxim\u00e1ln\u00ed \u00fasil\u00ed v\u011bnovali obnov\u011b slu\u017eeb a komunikaci se z\u00e1kazn\u00edky, kte\u0159\u00ed n\u00e1m poslali tis\u00edce mailov\u00fdch dotaz\u016f a chat\u016f b\u011bhem n\u011bkolika hodin. Cel\u00e1 v\u011bc se \u0159e\u0161ila v pln\u00e9m nasazen\u00ed a v pr\u00e1ci byli prakticky v\u0161ichni kolegov\u00e9 a to jak v p\u00e1tek odpoledne a v noci a v sobotu b\u011bhem dne.<\/strong><\/p>\n\n\n\n

Co n\u00e1s nezabije, tak n\u00e1s pos\u00edl\u00ed…<\/h2>\n\n\n\n

Z cel\u00e9ho probl\u00e9mu se pou\u010d\u00edme. Uprav\u00edme n\u00e1\u0161 krizov\u00fd pl\u00e1n a p\u0159iprav\u00edme mnoho a mnoho \u00faprav v na\u0161\u00ed firm\u011b.<\/p>\n\n\n\n

Co se u n\u00e1s ji\u017e zm\u011bnilo?<\/h2>\n\n\n\n

V sobotu jsme nainstalovali novou UPS nam\u00edsto jedn\u00e9 po\u0161kozen\u00e9 UPS. <\/strong>Nov\u00e1 UPS m\u00e1 nejen del\u0161\u00ed dobu z\u00e1lohy (15 minut p\u0159i pln\u00e9m zat\u00ed\u017een\u00ed), ale tak\u00e9 n\u011bkter\u00e9 lep\u0161\u00ed vlastnosti a lep\u0161\u00ed ochranu proti v\u00fdkyv\u016fm z vn\u011bj\u0161\u00ed elektrick\u00e9 s\u00edt\u011b. Nav\u00edc je \u00fasporn\u011bj\u0161\u00ed a t\u00edm u\u0161et\u0159\u00edme za elekt\u0159inu. UPS dorazila z Francie v rekordn\u011b kr\u00e1tk\u00e9m \u010dase.<\/p>\n\n\n\n

Objednali jsme za\u0159\u00edzen\u00ed, kter\u00e9 n\u00e1m umo\u017en\u00ed se p\u0159ipojit nouzov\u011b „ven“<\/strong> i v p\u0159\u00edpad\u011b nefunk\u010dnosti na\u0161\u00ed LAN v kancel\u00e1\u0159\u00edch.<\/p>\n\n\n\n

Upravili jsme krizov\u00e9 sc\u00e9n\u00e1\u0159e pro \u0159e\u0161en\u00ed krizov\u00fdch situac\u00ed.<\/p>\n\n\n\n

P\u0159\u00edstup k \u00fa\u010dt\u016fm na soci\u00e1ln\u00edch s\u00edt\u00edch bude m\u00edt v\u00edce koleg\u016f.<\/p>\n\n\n\n

Co se je\u0161t\u011b zm\u011bn\u00ed?<\/h2>\n\n\n\n

Zm\u011bn\u00edme i n\u011bjak\u00e9 v\u011bci ohledn\u011b organiza\u010dn\u00edch a bezpe\u010dnostn\u00edch nastaven\u00ed.<\/strong><\/p>\n\n\n\n

Ji\u017e jsme upravili n\u011bjak\u00e9 v\u011bci ohledn\u011b komunikace a je\u0161t\u011b to dolad\u00edme.<\/strong> Organiza\u010dn\u011b by to nem\u011bl b\u00fdt probl\u00e9m. Je n\u00e1s ve firm\u011b p\u0159es 20 a tak se o to pod\u011bl\u00edme.<\/p>\n\n\n\n

Mus\u00edme z\u0159ejm\u011b slevit z n\u011bkter\u00fdch bezpe\u010dnostn\u00edch pravidel a upravit n\u011bkter\u00e1 nastaven\u00ed tak, aby bylo mo\u017en\u00e9 n\u011bkter\u00e9 v\u011bci \u0159e\u0161it i odjinud, ne\u017e z na\u0161ich kancel\u00e1\u0159\u00ed a na\u0161\u00ed LAN.<\/p>\n\n\n\n

Ud\u011bl\u00e1me si n\u011bjak\u00e1 praktick\u00e1 \u0161kolen\u00ed pro krizov\u00e9 situace<\/strong>.<\/p>\n\n\n\n

Budeme testovat motorgener\u00e1tor pod z\u00e1t\u011b\u017e\u00ed. Doposud jsme pravideln\u011b testovali zda nastartuje, zda funguje po dobu cca 10 minut, zda m\u00e1 naftu apod., ale nyn\u00ed jsme m\u011bli probl\u00e9m s t\u00edm, \u017ee se n\u00e1m dostavila porucha po cca 15 minut\u00e1ch b\u011bhu pod plnou z\u00e1t\u011b\u017e\u00ed.<\/p>\n\n\n\n

Mus\u00edme vymyslet technick\u00e9 \u0159e\u0161en\u00ed pro podobnou situaci, kde bude mo\u017en\u00e9 snadno a rychle zve\u0159ejnit jakoukoliv informaci o tom, \u017ee se n\u011bco aktu\u00e1ln\u00edho d\u011bje.<\/strong> Doposud to bylo mo\u017en\u00e9 jen v administraci, chatu a tituln\u00ed str\u00e1nce. Do tohoto syst\u00e9mu byl v\u0161ak nemo\u017en\u00fd p\u0159\u00edstup. Mus\u00edme to roz\u0161\u00ed\u0159it a zjednodu\u0161it z hlediska p\u0159\u00edstupu a z\u00e1rove\u0148 mus\u00edme vymyslet n\u011bjak\u00fd n\u00e1hradn\u00ed web nebo web, kde budou podobn\u00e9 krizov\u00e9 sitauce uve\u0159ejn\u011bn\u00e9.<\/p>\n\n\n\n

Do administrace p\u0159id\u00e1me monitoring<\/strong> jednotliv\u00fdch slu\u017eeb, kter\u00e9 z\u00e1kazn\u00edk m\u00e1.<\/p>\n\n\n\n

P\u0159iprav\u00edme syst\u00e9m, kter\u00fd v podobn\u00e9 situaci po\u0161le v\u0161em z\u00e1kazn\u00edk\u016fm e-mail s informac\u00ed, \u017ee se n\u011bco d\u011bje<\/strong>. Nyn\u00ed takov\u00fd syst\u00e9m m\u00e1me, ale je p\u0159ipraven\u00fd p\u0159edev\u0161\u00edm na pl\u00e1novan\u00e9 odst\u00e1vky a ne na podobn\u00fd probl\u00e9m. Nav\u00edc je tam komplikace v tom, \u017ee pot\u0159ebujete v extr\u00e9mn\u011b kr\u00e1tk\u00e9m \u010dase poslat nap\u0159\u00edklad p\u0159es 100.000 e-mail\u016f a neb\u00fdt zablokov\u00e1n na r\u016fzn\u00fdch free-mailech, kter\u00e9 klienti pou\u017e\u00edvaj\u00ed.<\/p>\n\n\n\n

Je\u0161t\u011b p\u0159iprav\u00edme n\u011bkolik dal\u0161\u00ed \u00faprav. Pr\u016fb\u011b\u017en\u011b budeme informovat.<\/p>\n\n\n\n

Co chyst\u00e1me?<\/h2>\n\n\n\n

Ji\u017e n\u011bjakou dobu p\u0159ipravujeme projekt pro Datacentrum WEDOS 2, kter\u00fd t\u00edmto je\u0161t\u011b urychl\u00edme. Chceme m\u00edt dv\u011b nez\u00e1visl\u00e9 budovy, dv\u011b nez\u00e1visl\u00e9 technologie  a t\u00edm plnou redundanci pro p\u0159\u00edpad podobn\u00fdch n\u00e1hod.<\/strong><\/p>\n\n\n\n

V druh\u00e9m datacentru chceme nap\u0159\u00edklad m\u00edt nav\u00edc motorgener\u00e1tor na druh\u00e9 nap\u00e1jec\u00ed v\u011btvi na pln\u00fd v\u00fdkon 100%, co\u017e ve st\u00e1vaj\u00edc\u00edm \u0159e\u0161en\u00ed nem\u00e1me a nen\u00ed to v\u016fbec b\u011b\u017en\u00e9 ani v jin\u00fdch datacentrech. Nov\u00e9 datacentrum bychom cht\u011bli od po\u010d\u00e1tku stav\u011bt tak, aby vyhovovalo certifikaci TIER IV, tedy nejvy\u0161\u0161\u00edmu stupni „spolehliosti“.<\/p>\n\n\n\n

Ano, nebude to hned, ale zase to nebude trvat mnoho a mnoho let. Nyn\u00ed v\u00edm, \u017ee na\u0161e rozhodnut\u00ed, \u017ee chceme vybudovat druh\u00e9 datacentrum, je spr\u00e1vn\u00e9. <\/p>\n\n\n\n

Reakce na n\u011bkter\u00e9 pozn\u00e1mky aneb odpov\u011b\u010f na kritiku<\/h2>\n\n\n\n

Probl\u00e9my s komunikac\u00ed<\/h3>\n\n\n\n

Jak jsem psal ji\u017e v\u00fd\u0161e, tak probl\u00e9my s komunikac\u00ed nebyly z\u00e1m\u011brn\u00e9, ale byl to d\u016fsledek cel\u00e9ho probl\u00e9mu. U n\u00e1s opravdu nic netaj\u00edme a u\u017e v\u016fbec ne takovou z\u00e1sadn\u00ed ud\u00e1lost.<\/p>\n\n\n\n

Shoda mnoha n\u00e1hod<\/h3>\n\n\n\n

Neselhala jedna v\u011bc. Selhalo n\u011bkolik v\u011bc\u00ed sou\u010dasn\u011b, respektive postupn\u011b jako n\u00e1sledek n\u011bjak\u00e9ho probl\u00e9mu v rozvodn\u00e9 s\u00edti. V\u0161e souviselo s elekt\u0159inou, kter\u00e1 je z\u00e1lohov\u00e1na (chr\u00e1n\u011bna pomoc\u00ed p\u0159ep\u011b\u0165ov\u00fdch ochran a proudov\u00fdch chr\u00e1ni\u010d\u016f) a p\u0159esto k v\u00fdpadku do\u0161lo.<\/p>\n\n\n\n

Elektroinstalace<\/h3>\n\n\n\n

M\u00e1me dv\u011b plnohodnotn\u00e9 nap\u00e1jec\u00ed v\u011btve – ka\u017ed\u00e1 se samostatnou UPS a na jedn\u00e9 v\u011btvi motorgener\u00e1tor. Ka\u017ed\u00e1 nap\u00e1jec\u00ed v\u011btev vede do server\u016f zcela odd\u011blen\u011b a to do jednoho nap\u00e1jec\u00edho zdroje jedna v\u011btev a do druh\u00e9ho zdroje (v tomt\u00e9\u017e serveru) druh\u00e1 v\u011btev. Du\u00e1ln\u00ed nap\u00e1jen\u00ed m\u00e1me i u switch\u016f, co\u017e nen\u00ed zcela b\u011b\u017en\u00e9  \u0159e\u0161en\u00ed. Ka\u017ed\u00e1 nap\u00e1jec\u00ed v\u011btev je zcela plnohodnotn\u00e1 a m\u00e1 dostate\u010dn\u00fd v\u00fdkon a kapacitu na 100% v\u00fdkonu.<\/p>\n\n\n\n

Pravd\u011bpodobnost poruch jednotliv\u00fdch v\u011bc\u00ed je jednou za n\u011bkolik let. U n\u00e1s jsou v\u011bci je\u0161t\u011b redundnatn\u00ed a t\u00edm se pravd\u011bpodobnost v\u00fdpadku sni\u017euje a tak „\u0161ance“, \u017ee se n\u011bco pokaz\u00ed je skute\u010dn\u011b minim\u00e1ln\u00ed. Bohu\u017eel u n\u00e1s do\u0161lo ke kombinaci n\u011bkolika faktor\u016f a t\u00edm skute\u010dn\u011b k v\u00fdpadku. Pravd\u011bpodobnost, \u017ee se stane n\u011bkolik v\u011bc\u00ed sou\u010dasn\u011b, je minim\u00e1ln\u00ed, ale stalo se. Mus\u00edme se pou\u010dit.<\/p>\n\n\n\n

O tom, jak m\u00e1me ud\u011blanou elektroinstalaci se m\u016f\u017ee ka\u017ed\u00fd p\u0159esv\u011bd\u010dit osobn\u011b.<\/p>\n\n\n\n

Nic jsme neo\u0161idili<\/h3>\n\n\n\n

Nic jsme neo\u0161idili. P\u0159i budov\u00e1n\u00ed na\u0161eho datacentra jsme nic neo\u0161idili. Ani u elektroinstalace. Dokonce m\u00e1me v\u0161ude p\u0159ep\u011b\u0165ov\u00e9 ochrany a proudov\u00e9 chr\u00e1ni\u010de.<\/p>\n\n\n\n

DNS servery<\/h3>\n\n\n\n

Zazn\u011blo i to, \u017ee m\u00e1me \u0161patn\u011b DNS servery a \u017ee byl n\u00e1sledn\u00fd probl\u00e9m i kv\u016fli tomu. Nen\u00ed to pravda. M\u00e1me naprosto ide\u00e1ln\u00ed \u0159e\u0161en\u00ed DNS server\u016f pro Va\u0161e dom\u00e9ny. M\u00e1me 4 DNS servery, ka\u017ed\u00fd na jin\u00e9 dom\u00e9nov\u00e9 koncovce (.cz, .eu,.net a .com) a ka\u017ed\u00fd je na jin\u00e9m fyzick\u00e9m serveru a na jin\u00e9m rozsahu IP adres a jsou ve 3 r\u016fzn\u00fdch lokalit\u00e1ch a ve 3 r\u016fzn\u00fdch zem\u00ed a u 3 r\u016fzn\u00fdch poskytovatel\u016f a k tomu na 2 r\u016fzn\u00fdch softwarov\u00fdch \u0159e\u0161en\u00edch. Tam probl\u00e9m skute\u010dn\u011b nebyl.<\/p>\n\n\n\n

Ztr\u00e1ta dat nebo rychlost opravy<\/h3>\n\n\n\n

Trochu probl\u00e9m nastal u jednoho z n\u011bkolika mailserver\u016f. Museli jsme se rozhodnout, zda jej spust\u00edme rychle, ale ztrat\u00edme n\u011bkter\u00e1 data nebo budeme situaci \u0159e\u0161it pomaleji a bez ztr\u00e1ty dat. Rozhodli jsme se pro pomalej\u0161\u00ed \u0159e\u0161en\u00ed a t\u00edm nikdo nep\u0159i\u0161el o \u017e\u00e1dn\u00e1 data. Ano, jeden z mailerver\u016f jsme obnovovali a\u017e do soboty r\u00e1no, tj. cca 16 hodin probl\u00e9m, ale nikdo o nic nep\u0159i\u0161el a to je podstatn\u00e9.<\/p>\n\n\n\n

Telefony a nep\u0159ij\u00edm\u00e1n\u00ed hovor\u016f<\/h3>\n\n\n\n

Nefungovaly n\u00e1m telefonn\u00ed hovory, proto\u017ee v\u0161e m\u00e1me p\u0159es internet a kdy\u017e n\u00e1m ne\u0161la LAN, tak n\u00e1m nefungovaly ani VoIP telefony. <\/p>\n\n\n\n

T\u00fdmov\u00e1 spolupr\u00e1ce<\/h3>\n\n\n\n

\u0158e\u0161en\u00ed cel\u00e9ho probl\u00e9mu se zvl\u00e1dlo, proto\u017ee nejsme one man show a ani moje nep\u0159\u00edtomnost neznamenala z\u00e1sadn\u00ed probl\u00e9m. Snad jen ta komunikace v\u00e1zla…Je n\u00e1s ve firm\u011b p\u0159es 20, ka\u017ed\u00fd m\u00e1 p\u0159esn\u011b stanov\u00e9 \u00fakoly.<\/p>\n\n\n\n

Cht\u011bl bych tak\u00e9 pod\u011bkovat dodavatelsk\u00fdm firm\u00e1m, kter\u00e9 n\u00e1m pomohli zajistit opravu po\u0161kozen\u00fdch za\u0159\u00edzen\u00ed a zprovozn\u011bn\u00ed v\u0161ech syst\u00e9m\u016f v rekordn\u011b kr\u00e1tk\u00e9m \u010dase. <\/p>\n\n\n\n

Na z\u00e1v\u011br se je\u0161t\u011b jednou omlouv\u00e1m<\/h2>\n\n\n\n

P\u0159ijm\u011bte je\u0161t\u011b jednou omluvu a v\u011b\u0159te, \u017ee jsme se z tohoto nep\u0159\u00edjmn\u00e9ho probl\u00e9mu pou\u010dili a je\u0161t\u011b pou\u010d\u00edme a p\u0159iprav\u00edme mnoho opat\u0159en\u00ed, aby se nemohla podobn\u00e1 situace opakovat.<\/strong><\/p>\n\n\n\n

Jsme si v\u011bdomi toho, \u017ee u n\u00e1s hostuje p\u0159es 11% \u010desk\u00e9ho internetu a tak v p\u0159\u00edpad\u011b probl\u00e9m\u016f je dopad skute\u010dn\u011b velk\u00fd a nedostanete se na ka\u017edou 9. internetovou str\u00e1nku v \u010cR. Proto je nutn\u00e9 ke v\u0161emu p\u0159istupovat maxim\u00e1ln\u011b zodpov\u011bdn\u011b.<\/p>\n\n\n\n

Snad naposledy se je\u0161t\u011b omluv\u00edm a budu se naplno v\u011bnovat na\u0161im intern\u00edm \u00faprav\u00e1m a vylep\u0161en\u00ed a nov\u00fdm slu\u017eb\u00e1m, kter\u00e9 pro na\u0161e klienty p\u0159ipravujeme.<\/p>\n\n\n\n

Galerie<\/h2>\n\n\n\n
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    <\/p>\n","protected":false},"excerpt":{"rendered":"

    P\u0159ed deseti dny se u n\u00e1s stala velk\u00e1 nep\u0159\u00edjemnost. M\u011bli jsme probl\u00e9my s nap\u00e1jen\u00edm a t\u00edm do\u0161lo ke komplikac\u00edm p\u0159i poskytov\u00e1n\u00ed slu\u017eeb na\u0161im z\u00e1kazn\u00edk\u016fm. <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,101],"tags":[],"class_list":["post-54989","post","type-post","status-publish","format-standard","hentry","category-spolecnost","category-udalosti"],"_links":{"self":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts\/54989","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/comments?post=54989"}],"version-history":[{"count":3,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts\/54989\/revisions"}],"predecessor-version":[{"id":55023,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/posts\/54989\/revisions\/55023"}],"wp:attachment":[{"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/media?parent=54989"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/categories?post=54989"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.wedos.com\/cs\/wp-json\/wp\/v2\/tags?post=54989"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}