{"id":97250,"date":"2020-10-17T02:42:24","date_gmt":"2020-10-17T00:42:24","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/gotovim-drp-ne-zabudte-uchest-meteorit"},"modified":"2020-10-17T02:42:24","modified_gmt":"2020-10-17T00:42:24","slug":"gotovim-drp-ne-zabudte-uchest-meteorit","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/gotovim-drp-ne-zabudte-uchest-meteorit","title":{"rendered":"Valmistame DRP-d \u2014 \u00e4rge unustage arvestada meteoriidiga","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/ruvds\/blog\/523004\/\"><img decoding=\"async\" alt=\"Valmistame DRP-d \u2014 \u00e4rge unustage arvestada meteoriidiga\" src=\"\/wp-content\/uploads\/2020\/10\/fb66454bbc5701daf84a05c5132f9827.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><br \/>\n<i>Isegi katastroofi ajal on alati aega tassit\u00e4ite tee joomiseks<\/i><\/p>\n<p><b>DRP <\/b>(disaster recovery plan) \u2014 see on asi, mida ideaalis ei peaks kunagi vaja minema. Kuid kui \u00e4kki, r\u00e4ndamisaegsed kobraste, n\u00e4rivad peamise kiudoptilise kaabli l\u00e4bi v\u00f5i noor administraator kustutab t\u00f6\u00f6keskkonna andmebaasi, soovite kindlasti olla kindel, et teil on eelnevalt koostatud plaan selle k\u00f5igega tegelemiseks.<\/p>\n<p>Kui kliendid paanikas hakkavad tehnilise toe telefoniliine katkestama, otsib noor administreerija ts\u00fcaniide, samal ajal kui te olete tarkad silmadega punase \u00fcmbriku avanud ja hakkate k\u00f5ike korda seadma.<\/p>\n<p>Selles postituses tahan jagada soovitusi, kuidas DRP-d kirjutada ja mida see peaks sisaldama. Samuti vaatame j\u00e4rgmisi asju:<\/p>\n<ol>\n<li>\u00d5pime m\u00f5tlema nagu kurikael.<\/li>\n<li>K\u00e4ime l\u00e4bi tassi tee kasu apokal\u00fcpsise ajal.<\/li>\n<li>M\u00f5tleme mugava DRP struktuuri peale<\/li>\n<li>Vaadake, kuidas seda testida<\/li>\n<\/ol>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Millistele ettev\u00f5tetele see v\u00f5ib olla kasulik<\/h2>\n<p>\nOn v\u00e4ga keeruline t\u00f5mmata piir, kui IT-osakond hakkab selliseid asju vajama. \u00dctlesin, et DRP on teile kindlasti vajalik, kui:<\/p>\n<ul>\n<li>Server, application, or database downtime can lead to significant business losses overall.<\/li>\n<li>You have a full IT department. A department as a complete unit of the company, with its own budget, not just a few exhausted employees managing the network, cleaning viruses, and refilling printers.<\/li>\n<li>You have an actual budget for at least partial backup in case of emergencies. <\/li>\n<\/ul>\n<p>\nWhen the IT department begs for months for just a couple of HDDs for an old server for backups, it\u2019s unlikely you'll be able to organize a full migration of a downed service to backup resources. However, documentation will still be invaluable.<\/p>\n<h2>Documentation is important.<\/h2>\n<p>\nStart with documentation. Let's say your service operates on a Perl script written three generations of admins ago, and no one knows how it works. The accumulated technical debt and lack of documentation will inevitably shoot you not only in the knee but also in other extremities; it is merely a matter of time.<\/p>\n<p>\u041f\u043e\u0441\u043b\u0435 \u0442\u043e\u0433\u043e, \u043a\u0430\u043a \u0443 \u0432\u0430\u0441 \u043d\u0430 \u0440\u0443\u043a\u0430\u0445 \u0435\u0441\u0442\u044c \u0445\u043e\u0440\u043e\u0448\u0435\u0435 \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u0441\u0435\u0440\u0432\u0438\u0441\u0430, \u043f\u043e\u0434\u043d\u0438\u043c\u0438\u0442\u0435 \u0441\u0442\u0430\u0442\u0438\u0441\u0442\u0438\u043a\u0443 \u043f\u043e \u0430\u0432\u0430\u0440\u0438\u044f\u043c. \u041f\u043e\u0447\u0442\u0438 \u043d\u0430\u0432\u0435\u0440\u043d\u044f\u043a\u0430 \u043e\u043d\u0438 \u0431\u0443\u0434\u0443\u0442 \u0441\u043e\u0432\u0435\u0440\u0448\u0435\u043d\u043d\u043e \u0442\u0438\u043f\u043e\u0432\u044b\u0435. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0443 \u0432\u0430\u0441 \u0432\u0440\u0435\u043c\u044f \u043e\u0442 \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u0434\u0438\u0441\u043a, \u0447\u0442\u043e \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a \u043e\u0442\u043a\u0430\u0437\u0443 \u043d\u043e\u0434\u044b \u0434\u043e \u0435\u0435 \u0440\u0443\u0447\u043d\u043e\u0439 \u043e\u0447\u0438\u0441\u0442\u043a\u0438. \u0418\u043b\u0438 \u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u0441\u044f \u043d\u0435\u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u0439 \u0441\u0435\u0440\u0432\u0438\u0441 \u0438\u0437-\u0437\u0430 \u0442\u043e\u0433\u043e, \u0447\u0442\u043e \u043a\u0442\u043e-\u0442\u043e \u043e\u043f\u044f\u0442\u044c \u0437\u0430\u0431\u044b\u043b \u043f\u0440\u043e\u0434\u043b\u0438\u0442\u044c \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442, \u0430 Let&#8217;s Encrypt \u043d\u0430\u0441\u0442\u0440\u043e\u0438\u0442\u044c \u043d\u0435 \u0441\u043c\u043e\u0433 \u0438\u043b\u0438 \u043d\u0435 \u0437\u0430\u0445\u043e\u0442\u0435\u043b.<\/p>\n<h2>M\u00f5tle nagu diversant<\/h2>\n<p>\nK\u00f5ige keerulisem osa on ennustada neid rikkeid, mida pole kunagi varem esinenud, aga mis v\u00f5ivad teie teenuse t\u00e4ielikult v\u00e4lja l\u00fclitada. Siinkohal m\u00e4ngime tavaliselt kolleegidega kurikaelu. V\u00f5tke palju kohvi ja midagi maitsvat ning lukustuge koosolekuruumi. Ainult veenduge, et lukustasite sinna ka need insenerid, kes teenuseid \u00fcles t\u00f5stsid v\u00f5i t\u00f6\u00f6tavad pidevalt nendega. Seej\u00e4rel joonistage kas tahvlile v\u00f5i paberile k\u00f5ik v\u00f5imalikud \u00f5udused, mis v\u00f5ivad teie teenusega juhtuda. Ei ole vajalik detailideni minna, piisab, kui arutada stsenaariumi \u201eKohaliku v\u00f5rgu terviklikkuse rikkumine\u201c.<\/p>\n<p>Tavaliselt mahub enamik t\u00fc\u00fcpilisi avariisituatsioone j\u00e4rgmiste kategooriate alla:<\/p>\n<ul>\n<li>V\u00f5rguh\u00e4ired<\/li>\n<li>OS teenuste haprused<\/li>\n<li>Rakenduse rikked<\/li>\n<li>Riistvara rikete<\/li>\n<li>Virtualiseerimise probleemid<\/li>\n<\/ul>\n<p>\nLihtsalt l\u00e4hege l\u00e4bi iga t\u00fc\u00fcbi ja vaadake, mis teie teenusele kehtib. N\u00e4iteks v\u00f5ib Nginx'i demon kukkuda ja mitte t\u00f5usta \u2013 see on OS-i poolt p\u00f5hjustatud t\u00f5rge. Harv olukord, mis toob teie veebirakenduse t\u00f6\u00f6seisaku \u2013 tarkvara t\u00f5rge. Selle etapi l\u00e4bimise ajal on oluline t\u00f5rke diagnoosimine. Kuidas eristada virtuaalisse j\u00e4\u00e4kidest eri interfeyssi v\u00f5rgu ja riistvara t\u00f5rgetest? See on oluline, et kiiresti leida vastutavad ja hakata neid segama, kuni h\u00e4daolukord on lahendatud.<\/p>\n<p>P\u00e4rast seda, kui t\u00fc\u00fcpilised probleemid on \u00fcles kirjutatud, valame veel kohvi ja hakkame vaatama k\u00f5ige kummalisemaid stsenaariume, kus teatud parameetrid hakkavad normist tugevalt v\u00e4ljumiseks. N\u00e4iteks:<\/p>\n<ul>\n<li>Mida juhtub, kui aktiivse s\u00f5lme aeg nihkub minuti v\u00f5rra tagasi v\u00f5rreldes teistega klastris?<\/li>\n<li>Ent kui aeg nihkub ettepoole, ja mis siis, kui 10 aastat?<\/li>\n<li>Mida juhtub, kui klastris\u00f5lm kaotab v\u00f5rgus ootamatult \u00fchenduse s\u00fcnkroniseerimise ajal?<\/li>\n<li>Ja mis juhtub, kui kaks s\u00f5lme ei saa omavahel juhtimist jagada, kuna nad on ajaliselt v\u00f5rgu kaudu eraldatud? <\/li>\n<\/ul>\n<p>\nSelles etapis aitab v\u00e4ga tagurpidi l\u00e4henemine. V\u00f5ta k\u00f5ige rohkem hullumeelne tiimiliige, kellel on haige fantaasia, ja anna talle \u00fclesanne l\u00fchikese aja jooksul korraldada diversioon, mis rikub teenuse. Kui seda on raske diagnoosida \u2014 veel parem. Sa ei usu, kui kummalisi ja lahedaid m\u00f5tteid insenerid v\u00e4ljendavad, kui anda neile idee midagi purustada. Ja kui lubada neile selleks testimisseade \u2014 on asi t\u00e4iesti hea.<\/p>\n<h2>Mis on see teie DRP?!<\/h2>\n<p>\nNii, olete m\u00e4\u00e4ratlenud ohtude mudeli. Olete arvestanud ka kohalikke elanikke, kes l\u00f5ikavad kiudoptilisi kaableid vaskematerjali otsinguil, ning s\u00f5jav\u00e4eradarit, mis kukutab raadioside liini t\u00e4pselt reedeti kell 16:46. N\u00fc\u00fcd tuleb aru saada, mida k\u00f5igega peale hakata.<\/p>\n<p>Teie \u00fclesanne on kirjutada need punased \u00fcmbrikud, mis avatakse h\u00e4daolukorras. Arvestage kohe, et kui (mitte kui!) k\u00f5ik kokku kukub, on l\u00e4heduses ainult k\u00f5ige v\u00e4hem kogenud praktikant, kelle k\u00e4ed v\u00e4risevad hirmust, mis toimub. Vaadake, kuidas h\u00e4daabitabletid on rakendatud meditsiinilistes kabinetides. N\u00e4iteks, mida teha anaf\u00fclaktilise \u0161oki korral. Meditsiinipersonal teab k\u00f5ik protokollid peast, kuid kui l\u00e4heduses on inimene, kes hakkab surema, haaravad nad sageli eksimatult k\u00f5ike. Selleks on seinal selge juhend punktide kujul nagu \u201eavatud pakend\u201d ja \u201esisestada veeni nii palju ravimit\u201d<\/p>\n<blockquote><p>H\u00e4daolukorras on raske m\u00f5elda! Peavad olema lihtsad juhised, et t\u00f6\u00f6tada sisemise instinkti j\u00e4rgi.<\/p><\/blockquote>\n<p>\nHea DRP koosneb mitmest lihtsast plokkist:<\/p>\n<ol>\n<li>Keda teavitada h\u00e4daolukorra algusest. See on oluline, et maksimaalselt jagada likvideerimise protsessi.<\/li>\n<li>Kuidas \u00f5igesti diagnoosida \u2014 teeme j\u00e4lgimise, vaatame systemctl status servicename ja nii edasi.<\/li>\n<li>Kui kaua v\u00f5ib iga etapi jaoks aega v\u00f5tta. Kui te ei suuda SLA aja jooksul k\u00e4sitsi parandada \u2014 virtuaalne masin h\u00e4vitatakse ja taastatakse eilse varukoopia p\u00f5hjal.<\/li>\n<li>Kuidas veenduda, et rike on l\u00f5petatud.<\/li>\n<\/ol>\n<p>\nPidage meeles, et DRP algab siis, kui teenus on t\u00e4ielikult t\u00f5rgenenud ja l\u00f5peb t\u00f6\u00f6v\u00f5ime taastamisega, isegi v\u00e4hendatud t\u00f5hususega. Lihtne varukoopia kaotamine ei peaks DRP-d aktiveerima. Ja v\u00f5ite DRP-sse lisada ka tassi teed. T\u00f5siselt. Statistika kohaselt muutuvad paljud rikkeolukorrad ebameeldivatest katastroofilisteks, kuna t\u00f6\u00f6tajad kiirustavad midagi parandama, samal ajal h\u00e4vitades viimase elava s\u00f5lme andmete jaoks v\u00f5i l\u00f5petades klastrit t\u00e4ielikult. \u00dcldiselt annavad 5 minutit tassi tee tarbimiseks teile veidi aega rahuneda ja toimuvale anal\u00fc\u00fcsida.<\/p>\n<p>\u00c4rge segage DRP-d s\u00fcsteemi passiga! \u00c4rge koormake seda liialdaste andmetega. Lihtsalt v\u00f5imaldage kiiresti ja mugavalt h\u00fcperlinkide kaudu dokumentatsiooni \u00f5igetesse osadesse liikuda ning lugeda m\u00e4\u00e4ratud teenuse arhitektuuri kohta laiemas vormingus. DRP-s peaksid olema ainult otsesed juhised, kuhu ja kuidas \u00fchenduda, koos konkreetsete koopiatena sisestamiseks sobivate k\u00e4skudega.<\/p>\n<h2>Kuidas \u00f5igesti testida<\/h2>\n<p>\nVeenduge, et iga vastutav t\u00f6\u00f6taja suudab t\u00e4ita k\u00f5iki punkte. K\u00f5ige olulisemal hetkel v\u00f5ib selguda, et inseneril pole vajalikke \u00f5igusi vajalikku s\u00fcsteemi sisenemiseks, puuduvad paroolid \u00f5igete kontode jaoks v\u00f5i ta ei tea, mida t\u00e4hendab \u201e\u00dchenduge teenuste juhtpaneeli kaudu proxy kaudu peakorterisse.\u201c Iga punkt peab olema \u00e4\u00e4rmiselt lihtne.<\/p>\n<p><b>Vale <\/b> \u2014 \u201eMinge virtualiseerimise juurde ja taask\u00e4ivitage surnud s\u00f5lm\u201c<br \/>\n<b>\u00d5ige <\/b> \u2014 \u201e\u00dchenduge virt.example.com veebiliidese kaudu, valige s\u00f5lmede jaotises taask\u00e4ivitus s\u00f5lm, mis p\u00f5hjustab vea.\u201c<\/p>\n<p>\u00c4rge lubage ebaselgust. P\u00f6\u00f6rake t\u00e4helepanu hirmunud praktikandile.<\/p>\n<p>Testige kindlasti DRP-d. See pole lihtsalt dokumendi koostamine \u2014 see on osa, mis aitab teil ja teie klientidel kiiresti kriisist \u00fcle saada. Parim on seda teha mitu korda:<\/p>\n<ul>\n<li>\u00dcks ekspert ja mitmed praktikandid t\u00f6\u00f6tavad testimistempli peal, mis simuleerib t\u00f5eliselt teenust. Ekspert katkestab teenuse erinevatel viisidel ja annab praktikantidele v\u00f5imaluse seda taastada vastavalt DRP-le. K\u00f5ik probleemid, dokumentatsiooni ebaselgused ja vead on kirja pandud. P\u00e4rast praktikantide koolitust t\u00e4iustatakse ja lihtsustatakse DRP-d arusaamatutes kohtades.<\/li>\n<li>Testimine reaalsetes teenustes. T\u00f5eliselt ei saa kunagi luua t\u00e4iuslikku kopeerimist t\u00f5elisest teenusest. Seep\u00e4rast tuleb paar korda aastas plaanip\u00e4raselt v\u00e4lja l\u00fclitada osa serveritest, katkestada \u00fchendusi ja korraldada muid \u00f5nnetusi, et hinnata taastamise korda. Paremini on k\u00fcmme minutit plaanitud avariid keset \u00f6\u00f6d, kui \u00e4kiline rike, mis kestab mitu tundi tipptunnil andmete kadumisega.<\/li>\n<li>T\u00f5eline avariide k\u00f5rvaldamine. Jah, see on samuti osa testimisest. Kui juhtub avarii, mida pole ohtude nimekirjas, tuleb DRP-d t\u00e4iendada ja t\u00e4iendada tulemuste p\u00f5hjal, mille leiate selle uurimise k\u00e4igus.<\/li>\n<\/ul>\n<p><\/p>\n<h2>Peamised punktid<\/h2>\n<p><\/p>\n<ol>\n<li>Kui midagi halvasti juhtub, ei juhtu see lihtsalt, vaid toimub maksimaalselt katastroofilise stsenaariumi j\u00e4rgi.<\/li>\n<li>Veenduge, et teil on ressursid h\u00e4daolukorra koormuse \u00fcleviimiseks.<\/li>\n<li>Veenduge, et teil on varukoopiad, mis luuakse automaatselt ja kontrollitakse regulaarselt j\u00e4rjepidevuse osas.<\/li>\n<li>M\u00f5elge t\u00fc\u00fcpiliste ohu stsenaariumide peale.<\/li>\n<li>Andke inseneridele v\u00f5imalus v\u00e4lja m\u00f5elda ebat\u00fc\u00fcpilisi viise teenuse katkemiseks.<\/li>\n<li>DRP peab olema lihtne ja arusaadav juhend. K\u00f5ik keeruline diagnostika toimub alles siis, kui klientide teenus on taastatud. Olgu see isegi varuresursside peal.<\/li>\n<li>M\u00e4\u00e4rake DRP-s v\u00f5tmete telefoond ja kontaktid.<\/li>\n<li>Regulaarselt katsetage t\u00f6\u00f6tajate arusaama DRP-st.<\/li>\n<li>Korraldage planeeritud avariisid tootmisprotsessis. Seisundid ei saa k\u00f5ike asendada.<\/li>\n<\/ol>\n<p>\n<noindex><a rel=\"nofollow\" href=\"http:\/\/ruvds.com\/ru-rub?utm_source=habr&amp;utm_medium=article&amp;utm_campaign=meklon&amp;utm_content=plan_po_likvidacii_posledstvij_katastrofy#order\"><img decoding=\"async\" alt=\"Valmistame DRP-d \u2014 \u00e4rge unustage arvestada meteoriidiga\" src=\"\/wp-content\/uploads\/2020\/10\/3197779ad6b4e148ea0b5a7c6a906e02.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><\/p>\n<p><noindex><a rel=\"nofollow\" href=\"http:\/\/ruvds.com\/ru-rub\/news\/read\/123?utm_source=habr&amp;utm_medium=article&amp;utm_campaign=meklon&amp;utm_content=plan_po_likvidacii_posledstvij_katastrofy\"><img decoding=\"async\" alt=\"Valmistame DRP-d \u2014 \u00e4rge unustage arvestada meteoriidiga\" src=\"\/wp-content\/uploads\/2020\/10\/714c3d3917a9a58f7fb14d97c3edd783.jpeg\" style=\"display:block;margin: 0 auto;\" \/><\/a><\/noindex><br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/ruvds\/blog\/523570\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0414\u0430\u0436\u0435 \u0432\u043e \u0432\u0440\u0435\u043c\u044f \u043a\u0430\u0442\u0430\u0441\u0442\u0440\u043e\u0444\u044b \u0432\u0441\u0435\u0433\u0434\u0430 \u0435\u0441\u0442\u044c \u0432\u0440\u0435\u043c\u044f \u043d\u0430 \u0447\u0430\u0448\u043a\u0443 \u0447\u0430\u044f DRP (disaster recovery plan) \u2014 \u044d\u0442\u043e \u0448\u0442\u0443\u043a\u0430, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0432 \u0438\u0434\u0435\u0430\u043b\u0435 \u043d\u0438\u043a\u043e\u0433\u0434\u0430 \u043d\u0435 \u043f\u043e\u043d\u0430\u0434\u043e\u0431\u0438\u0442\u0441\u044f. \u041d\u043e \u0435\u0441\u043b\u0438 \u0432\u0434\u0440\u0443\u0433 \u043c\u0438\u0433\u0440\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432 \u0431\u0440\u0430\u0447\u043d\u044b\u0439 \u043f\u0435\u0440\u0438\u043e\u0434 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