{"id":34430,"date":"2019-10-31T21:58:16","date_gmt":"2019-10-31T18:58:16","guid":{"rendered":"https:\/\/prohoster.info\/blog\/pochemu-inzhenery-ne-zabotyatsya-o-monitoringe-prilozhenij\/"},"modified":"2019-10-31T21:58:16","modified_gmt":"2019-10-31T18:58:16","slug":"pochemu-inzhenery-ne-zabotyatsya-o-monitoringe-prilozhenij","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/pochemu-inzhenery-ne-zabotyatsya-o-monitoringe-prilozhenij","title":{"rendered":"Miks insenerid ei huvitu rakenduste j\u00e4lgimisest?","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Head reedet! S\u00f5brad, t\u00e4na j\u00e4tkame oma postituste seeriat kursusest <noindex><a rel=\"nofollow\" href=\"https:\/\/otus.pw\/UfUA\/\">\u201eDevOps praktikas ja t\u00f6\u00f6riistades\u201c<\/a><\/noindex>, kuna uue grupi tunnid algavad juba j\u00e4rgmisel n\u00e4dalal. Nii et alustame!<\/p>\n<p><img decoding=\"async\" alt=\"Miks insenerid ei huvitu rakenduste j\u00e4lgimisest?\" src=\"\/wp-content\/uploads\/2019\/05\/4c148e64f6080a2c89fa8075d1e133a5.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nJ\u00e4lgimine on <b>lihtne<\/b>. See on tuntud fakt. K\u00e4ivitage Nagios, k\u00e4itage NRPE eemaloleval s\u00fcsteemil, seadistage Nagios NRPE TCP pordile 5666 ja teil on j\u00e4lgimine.<\/p>\n<p>See on nii lihtne, et see pole huvitav. N\u00fc\u00fcd on teil p\u00f5himetriigid, nagu protsessori aeg, diskiallikas ja m\u00e4lu, mis tulevad vaikimisi Nagiosesse ja NRPEsse. Kuid tegelikult ei ole see \u00abj\u00e4lgimine\u00bb niiv\u00f5rd. See on vaid algus.<\/p>\n<p>(Tavaliselt installitakse PNP4Nagios, RRDtool ja Thruk, seadistatakse teavitused Slackis ja minnakse otse nagiosexchange'i, aga j\u00e4tame selle praegu k\u00f5rvale).<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p><b>Hea j\u00e4lgimine<\/b> on tegelikult \u00fcsna keeruline, peate t\u00f5eliselt teadma rakenduse siseelundeid, mida te j\u00e4lgite.<\/p>\n<h2>Kas j\u00e4lgimine on keeruline?<\/h2>\n<p>\nIga server, olgu see Linux v\u00f5i Windows, teenib kindlat eesm\u00e4rki. Apache, Samba, Tomcat, failis\u00fcsteem, LDAP \u2014 k\u00f5ik need teenused on \u00fches v\u00f5i mitmes aspektis ainulaadsed. Igal neist on oma funktsioon ja omadused. Serveri koormuse all saadud m\u00f5\u00f5dikute ja KPI-de (v\u00f5tmem\u00f5\u00f5dikud) hankimiseks on erinevaid v\u00f5imalusi.<\/p>\n<p><img decoding=\"async\" alt=\"Miks insenerid ei huvitu rakenduste j\u00e4lgimisest?\" src=\"\/wp-content\/uploads\/2019\/05\/020d7043393b3f200316ad35fe8a8801.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Foto autor <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/JKUTrJ4vK00?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Luke Chesser<\/a><\/noindex> j\u00e4rgnevaga <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/search\/photos\/monitoring?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Unsplash<br \/>\n<\/a><\/noindex><\/i><\/p>\n<p>( sooviksin, et mu armatuurlaud oleks v\u00e4rvitud neoonsiniseks \u2014 unistavalt ohates \u2014\u2026 hmmm\u2026)<\/p>\n<p>Iga teenuseid pakkuv tarkvara peab omama mehhanismi m\u00f5\u00f5dikute kogumiseks. Apachil on moodul <code>mod-status<\/code>, mis kuvab serveri oleku lehte. Nginx-il on <code>stub_status<\/code>. Tomcatil on JMX v\u00f5i spetsiaalsed veebirakendused, mis n\u00e4itavad v\u00f5tmem\u00f5\u00f5dikuid. MySQL-is on k\u00e4sk \u201eshow global status\u201c jne.<br \/>\nMiks siis arendajad ei integreeri selliseid mehhanisme rakendustesse, mida nad loovad?<\/p>\n<h2>Kas seda teevad ainult arendajad?<\/h2>\n<p>\nM\u00f5istetav \u00fcksk\u00f5iksuse tase m\u00f5\u00f5dikute integreerimise osas ei piirdu ainult arendajatega. Olen t\u00f6\u00f6tanud ettev\u00f5tetes, kus arendati rakendusi Tomcatiga, kuid ei jagatud mingeid oma m\u00f5\u00f5dikuid ega teenuse aktiivsuse logisid, v\u00e4lja arvatud Tomcati \u00fcldised vealogid. M\u00f5ned arendajad genereerivad hulgaliselt logisid, mis ei t\u00e4henda s\u00fcsteemiadministraatori jaoks midagi, kes peab nende lugemisega tegelema kell 3:15 hommikul.<\/p>\n<p><img decoding=\"async\" alt=\"Miks insenerid ei huvitu rakenduste j\u00e4lgimisest?\" src=\"\/wp-content\/uploads\/2019\/05\/35a97d70424bbc652f85a4b88a1392fe.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Foto autor <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/1K9T5YiZ2WU?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Tim Gouw<\/a><\/noindex> j\u00e4rgnevaga <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/search\/photos\/developers?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Unsplash<\/a><\/noindex><\/i><\/p>\n<p>S\u00fcsteeminsenerid, kes lubavad sellistel toodetel versioonile minna, peaksid samuti kandma teatud vastutust olukorra eest. V\u00e4ga v\u00e4hestel s\u00fcsteeminseneridel on aega ja nad ei p\u00fc\u00fca midagi olulist logidest v\u00e4lja v\u00f5tta, ilma et neil oleks konteksti nende m\u00f5\u00f5dikute jaoks v\u00f5i v\u00f5imalust neid t\u00f5lgendada rakenduse tegevuse valguses. M\u00f5ned ei saa aru, millist kasu nad sellest saavad, v\u00e4lja arvatud teavet nagu 'midagi on praegu (v\u00f5i peagi) valesti'.<\/p>\n<p>M\u00f5tlemise muutmine seoses m\u00f5\u00f5dikute vajalikusega peaks toimuma mitte ainult arendajate seas, vaid ka s\u00fcsteeminseneride seas.<\/p>\n<p>Iga s\u00fcsteemiinsener, kellele on vajalik mitte ainult reageerida kriitilistele s\u00fcndmustele, vaid ka tagada nende puudumine, seisab tavaliselt silmitses m\u00f5\u00f5dikute puudumisega.<\/p>\n<p>Kuid s\u00fcsteemiinsenerid ei s\u00fcvene tavaliselt koodisse, teenides raha oma ettev\u00f5tte jaoks. Neil on vaja juhtivaid arendajaid, kes m\u00f5istavad s\u00fcsteemiinseneri vastutuse t\u00e4htsust probleemide avastamisel, j\u00f5udluse probleemide teadlikkuse t\u00f5stmisel ja muus.<\/p>\n<h2>See devops asi<\/h2>\n<p>\nDevops mentaliteet kirjeldab arendajate (dev) ja ekspluateerimise (ops) m\u00f5tlemise s\u00fcnergiat. Iga ettev\u00f5tte kohta, kes v\u00e4idab, et nad \u201eteevad devopsi\u201d, peab olema:<\/p>\n<ol>\n<li>\u00fctlema, et nad t\u00f5en\u00e4oliselt ei tee (viide filmi \u201ePrintsess-Immer\u201d memele \u2014 \u201eMa ei arva, et see t\u00e4hendab seda, mida sa arvad, et see t\u00e4hendab!\u201d)<\/li>\n<li>soodustama pideva toote t\u00e4iustamise hoiakut.<\/li>\n<\/ol>\n<p>\nTe ei saa toodet t\u00e4iustada ja teada, et see oli t\u00e4iustatud, kui sa ei tea, kuidas see praegu t\u00f6\u00f6tab. Sa ei suuda aru saada, kuidas toode t\u00f6\u00f6tab, kui sa ei m\u00f5ista, kuidas t\u00f6\u00f6tavad selle komponentid, teenused, millest see s\u00f5ltub, ja selle peamised valupunktid ja kitsaskohad.<br \/>\nKui sa ei j\u00e4lgi v\u00f5imalikke kitsaskohti, ei saa sa kasutada \u201eViit miks\u201d tehnikat postmortem\u2019i kirjutamisel. Sa ei suuda k\u00f5ike \u00fchel ekraanil kokku koguda, et n\u00e4ha, kuidas toode t\u00f6\u00f6tab v\u00f5i teada saada, kuidas see n\u00e4eb v\u00e4lja \u201enormaalsena ja \u00f5nnelikult\u201d.<\/p>\n<h2>Liiguta vasakule, VASAKULE, MA \u00dcTLESIN, AAAAAAAA\u2014 <\/h2>\n<p>\nMinu jaoks on DevOpsi \u00fcks peamisi p\u00f5him\u00f5tteid \u201eLiigutamine vasakule\u201d (shift left). Liigutamine vasakule selle konteksti t\u00e4henduses t\u00e4hendab v\u00f5imaluse nihutamist (<b>mitte vastutuse<\/b>, vaid ainult v\u00f5imaluse) teha seda, mille p\u00e4rast hoolivad tavaliselt s\u00fcsteemiinsenerid, n\u00e4iteks luua j\u00f5udluse m\u00f5\u00f5dikuid, kasutada logisid t\u00f5husamalt jne, vasakule tarkvara kohaletoimetamise eluts\u00fckli (Software Delivery Life Cycle) jooksul.<\/p>\n<p><img decoding=\"async\" alt=\"Miks insenerid ei huvitu rakenduste j\u00e4lgimisest?\" src=\"\/wp-content\/uploads\/2019\/05\/11d59b1a5dc14b88b7376accb5f7d686.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Foto autor <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/tWjzmNXKup4?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">NESA by Makers<\/a><\/noindex> j\u00e4rgnevaga <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/search\/photos\/software?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Unsplash<\/a><\/noindex><\/i><\/p>\n<p>Tarkvaraarendajatel peab olema v\u00f5imalus kasutada ja m\u00f5ista neid j\u00e4lgimisvahendeid, mida ettev\u00f5te kasutab, et j\u00e4lgida k\u00f5iki seda t\u00fc\u00fcpi tegevusi, metrikate, logimise, j\u00e4lgimisliideste ja, mis k\u00f5ige t\u00e4htsam, <i>vaadata, kuidas nende toode tootmises t\u00f6\u00f6tab<\/i>. Te ei saa sundida arendajaid panustama aega ja ressursse j\u00e4lgimisele, kui nad ei n\u00e4e meetrikasid ja ei saa m\u00f5jutada, kuidas need v\u00e4lja n\u00e4evad, kuidas toote omanik esitab need CTO-le j\u00e4rgmise koosoleku ajal jne.<\/p>\n<h2>L\u00fchidalt<\/h2>\n<p><\/p>\n<ol>\n<li>Viige hobune vee \u00e4\u00e4rele. N\u00e4idake arendajatele, kui palju probleeme nad saaksid v\u00e4ltida, aidake neil v\u00e4lja tuua \u00f5iged KPI-d ja m\u00f5\u00f5dikud oma rakenduste jaoks, et v\u00e4hendada toote omaniku kriitikat, kellele tehniline direktor (CTO) karjub. Viige nad valgusesse, \u00f5rnalt ja rahulikult. Kui see ei \u00f5nnestu, siis mahi neid, \u00e4hvardage ja veenke kas neid v\u00f5i toote omanikku, et need m\u00f5\u00f5dikud rakendustest nii kiiresti kui v\u00f5imalik k\u00e4tte saada ja joonistage siis diagrammid. See osutub keeruliseks, kuna see ei ole prioriteediks ja toote teekaardil on palju ootavaid projekte, mis toovad tulu. Seet\u00f5ttu vajate majanduslikku \u00f5igustust, et p\u00f5hjendada aega ja ressursse, mis kulutatakse j\u00e4lgimise integreerimisele tootesse.<\/li>\n<li>Aita s\u00fcsteemiinseneritel h\u00e4sti magada. N\u00e4idake neile, et 'v\u00e4ljalaskmise kontrollnimekirja' kasutamine iga v\u00e4ljastatava toote jaoks on positiivne. Samuti aitab see, et k\u00f5ik tootmises olevad rakendused on katsetatud m\u00f5\u00f5dikute abil, tagada rahulik uni \u00f6\u00f6sel, v\u00f5imaldades arendajatel n\u00e4ha, mis ja kus ei t\u00f6\u00f6ta. Siiski on vale viis iga arendaja, tootjavastutaja ja tehnilise juhataja \u00e4rritamiseks ja h\u00e4irimiseks pidevalt rattad kinni panna ja vastu seista. Selline k\u00e4itumine m\u00f5jutab toote v\u00e4ljaandmise kuup\u00e4eva, kui oodata taas viimase minutini, seega tehke uuesti vasakule nihke ja lisage need k\u00fcsimused v\u00f5imalikult kiiresti projekti plaani. Kui vajalik, varjake end toote kohtumistel. Kandke vale vuntsi ja fetr, see ei petta kunagi. Tehke oma probleemidest teadlik, n\u00e4idake selgeid eeliseid ja evangeliseerige.<\/li>\n<li>Veenduge, et nii arendajad (dev) kui ka tootmine (ops) m\u00f5istavad, mida t\u00e4hendab ja millised on tagaj\u00e4rjed toote m\u00f5\u00f5dikute sisenemisel \"punasesse tsooni\". \u00c4rge j\u00e4tke tootmist ainukeseks toote t\u00f6\u00f6kindluse valvamiseks, veenduge, et arendajad osalevad selles samuti (#productsquads).<\/li>\n<li>Logid on suurep\u00e4rased, kuid m\u00f5\u00f5dikud samuti. \u00dchendage need ja \u00e4rge laske oma logidel muutuda pr\u00fcgilaks tohutul tulel, mis on t\u00e4is kasulikke. Selgitage ja n\u00e4idake arendajatele, miks keegi peale nende ei suuda nende logisid lugeda, n\u00e4idake neile, milline see on, kui vaadata kasutut logi kell 3:15 hommikul.<\/li>\n<\/ol>\n<p>\n<img decoding=\"async\" alt=\"Miks insenerid ei huvitu rakenduste j\u00e4lgimisest?\" src=\"\/wp-content\/uploads\/2019\/05\/e4c9a0523d1e85158174c2e0e2608efa.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nFoto autor <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/photos\/uulf3173LPU?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Marko Horvat<\/a><\/noindex> j\u00e4rgnevaga <noindex><a rel=\"nofollow\" href=\"https:\/\/unsplash.com\/search\/photos\/logs?utm_source=unsplash&amp;utm_medium=referral&amp;utm_content=creditCopyText\">Unsplash<\/a><\/noindex><\/p>\n<p>Sellega on k\u00f5ik. Uus materjal ilmub j\u00e4rgmisel n\u00e4dalal. Kui soovite kursuse kohta rohkem teada, ootame teid <noindex><a rel=\"nofollow\" href=\"https:\/\/otus.pw\/Ux8s\/\">avatud uste p\u00e4ev<\/a><\/noindex>, mis toimub juba esmasp\u00e4eval. Ja n\u00fc\u00fcd ootame traditsiooniliselt teie kommentaare.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/otus\/blog\/453278\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u0441\u0435\u0445 \u0441 \u043f\u044f\u0442\u043d\u0438\u0446\u0435\u0439! \u0414\u0440\u0443\u0437\u044c\u044f, \u0441\u0435\u0433\u043e\u0434\u043d\u044f \u043c\u044b \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u043c \u0441\u0435\u0440\u0438\u044e \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0439 \u043f\u043e\u0441\u0432\u044f\u0449\u0435\u043d\u043d\u044b\u0445 \u043a\u0443\u0440\u0441\u0443 \u00abDevOps \u043f\u0440\u0430\u043a\u0442\u0438\u043a\u0438 \u0438 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u044b\u00bb, \u043f\u043e\u0442\u043e\u043c\u0443 \u043a\u0430\u043a \u0437\u0430\u043d\u044f\u0442\u0438\u044f \u0432 \u043d\u043e\u0432\u043e\u0439 \u0433\u0440\u0443\u043f\u043f\u0435 \u043f\u043e \u043a\u0443\u0440\u0441\u0443 \u0441\u0442\u0430\u0440\u0442\u0443\u044e\u0442 \u0443\u0436\u0435 \u0432 \u043a\u043e\u043d\u0446\u0435 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0435\u0439 \u043d\u0435\u0434\u0435\u043b\u0438. \u0418\u0442\u0430\u043a, \u043d\u0430\u0447\u043d\u0451\u043c! \u041c\u043e\u043d\u0438\u0442\u043e\u0440\u0438\u043d\u0433 \u2014 \u044d\u0442\u043e \u043f\u0440\u043e\u0441\u0442\u043e. \u042d\u0442\u043e \u0438\u0437\u0432\u0435\u0441\u0442\u043d\u044b\u0439 \u0444\u0430\u043a\u0442. \u041f\u043e\u0434\u043d\u0438\u043c\u0438\u0442\u0435 Nagios, \u0437\u0430\u043f\u0443\u0441\u0442\u0438\u0442\u0435 NRPE \u043d\u0430 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435, \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u0442\u0435 Nagios \u043d\u0430 \u043f\u043e\u0440\u0442 NRPE TCP 5666 \u0438 \u0443 \u0432\u0430\u0441 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25942,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-34430","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u0441\u0435\u0445 \u0441 \u043f\u044f\u0442\u043d\u0438\u0446\u0435\u0439! 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Friends, today we continue the series of publications dedicated to the course \"DevOps practices and tools\", as classes in the new group for the course will start at the end of next week. So, let's get started! Monitoring is simple. This is a well-known fact. 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