{"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\/ro\/blog\/administrirovanie\/pochemu-inzhenery-ne-zabotyatsya-o-monitoringe-prilozhenij","title":{"rendered":"De ce inginerii nu se \u00eengrijesc de monitorizarea aplica\u021biilor?","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Salut tuturor \u0219i bun\u0103 ziua de vineri! Prieteni, ast\u0103zi continu\u0103m seria de publica\u021bii dedicate cursului <noindex><a rel=\"nofollow\" href=\"https:\/\/otus.pw\/UfUA\/\">\u201ePracticile \u0219i instrumentele DevOps\u201d<\/a><\/noindex>, deoarece cursurile din noua grup\u0103 \u00eencep deja la sf\u00e2r\u0219itul s\u0103pt\u0103m\u00e2nii viitoare. A\u0219adar, s\u0103 \u00eencepem!<\/p>\n<p><img decoding=\"async\" alt=\"De ce inginerii nu se \u00eengrijesc de monitorizarea aplica\u021biilor?\" src=\"\/wp-content\/uploads\/2019\/05\/4c148e64f6080a2c89fa8075d1e133a5.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nMonitorizarea este <b>pur \u0219i simplu<\/b>. Este un fapt bine cunoscut. Porni\u021bi Nagios, activa\u021bi NRPE pe sistemul de la distan\u021b\u0103, configura\u021bi Nagios pe portul TCP NRPE 5666 \u0219i ave\u021bi monitorizarea.<\/p>\n<p>Este at\u00e2t de u\u0219or \u00eenc\u00e2t devine neinteresant. Acum ave\u021bi metricele de baz\u0103 pentru timpul de procesare, subsistemul de disk, memoria RAM, care sunt disponibile implicit \u00een Nagios \u0219i NRPE. Dar, de fapt, aceasta nu este \u201emonitorizare\u201d \u00een adev\u0103ratul sens al cuv\u00e2ntului. Este doar \u00eenceputul.<\/p>\n<p>(De obicei, se instaleaz\u0103 PNP4Nagios, RRDtool \u0219i Thruk, se configuraz\u0103 notific\u0103rile \u00een Slack \u0219i se intr\u0103 direct pe nagiosexchange, dar deocamdat\u0103 s\u0103 l\u0103s\u0103m asta deoparte).<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p><b>O monitorizare bun\u0103<\/b> este de fapt destul de complicat\u0103, trebuie s\u0103 \u00een\u021belege\u021bi cu adev\u0103rat inclusiv detalii tehnice ale aplica\u021biei pe care o monitoriza\u021bi.<\/p>\n<h2>Monitorizarea este complicat\u0103?<\/h2>\n<p>\nOrice server, fie el Linux sau Windows, va servi \u00een mod inevitabil unui anumit scop. Apache, Samba, Tomcat, stocare de fi\u0219iere, LDAP \u2013 toate aceste servicii sunt, \u00eentr-o anumit\u0103 m\u0103sur\u0103, unice \u00een unul sau mai multe aspecte. Fiecare are o func\u021bie a sa, caracteristici distincte. Exist\u0103 diferite moduri de a ob\u021bine metricile, KPI-uri (indicatori cheie de performan\u021b\u0103) care sunt relevante pentru dvs. atunci c\u00e2nd serverul este sub \u00eenc\u0103rcare.<\/p>\n<p><img decoding=\"async\" alt=\"De ce inginerii nu se \u00eengrijesc de monitorizarea aplica\u021biilor?\" src=\"\/wp-content\/uploads\/2019\/05\/020d7043393b3f200316ad35fe8a8801.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Autor foto <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> pe <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>(mi-a\u0219 dori ca dashboard-urile mele s\u0103 fie colorate \u00een nuan\u021be de albastru neon \u2014 suspin\u00e2nd vis\u0103tor \u2014\u2026 hm\u2026)<\/p>\n<p>Orice software care furnizeaz\u0103 servicii ar trebui s\u0103 aib\u0103 un mecanism pentru a colecta metricile. Apache are modulul <code>mod-status<\/code>, care afi\u0219eaz\u0103 pagina de stare a serverului. La Nginx exist\u0103 <code>stub_status<\/code>. Tomcat are JMX sau aplica\u021bii web speciale care afi\u0219eaz\u0103 metricile cheie. \u00cen MySQL exist\u0103 comanda \u201eshow global status\u201d \u0219i a\u0219a mai departe.<br \/>\nAtunci, de ce nu integreaz\u0103 dezvoltatorii astfel de mecanisme \u00een aplica\u021biile pe care le creeaz\u0103?<\/p>\n<h2>Doar dezvoltatorii fac asta?<\/h2>\n<p>\nUn anumit nivel de indiferen\u021b\u0103 fa\u021b\u0103 de integrarea metricilor nu se limiteaz\u0103 la dezvoltatori. Am lucrat \u00een companii care dezvoltau aplica\u021bii folosind Tomcat \u0219i nu furnizau nicio metric\u0103 proprie, niciun log de activitate al serviciului, \u00een afar\u0103 de jurnalele generale de erori Tomcat. Unii dezvoltatori genereaz\u0103 o abunden\u021b\u0103 de loguri, care nu \u00eenseamn\u0103 nimic pentru administratorul de sistem, c\u0103ruia nu-i este u\u0219or s\u0103 le citeasc\u0103 la 3:15 diminea\u021ba.<\/p>\n<p><img decoding=\"async\" alt=\"De ce inginerii nu se \u00eengrijesc de monitorizarea aplica\u021biilor?\" src=\"\/wp-content\/uploads\/2019\/05\/35a97d70424bbc652f85a4b88a1392fe.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Autor foto <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> pe <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>Inginerii sistemici care permit lansarea unor astfel de produse trebuie, de asemenea, s\u0103 poarte o anumit\u0103 responsabilitate pentru situa\u021bie. Pu\u021bini ingineri sistemici au timp \u0219i se preocup\u0103 s\u0103 \u00eencerce s\u0103 ob\u021bin\u0103 metrici semnificative din loguri, f\u0103r\u0103 contextul acestor metrici \u0219i f\u0103r\u0103 posibilitatea de a le interpreta \u00een lumina activit\u0103\u021bii aplica\u021biei. Unii nu \u00een\u021beleg ce beneficii pot ob\u021bine din asta, \u00een afar\u0103 de indicatori de tipul \u201eceva \u00een prezent (sau va fi cur\u00e2nd) nu este \u00een regul\u0103\u201d.<\/p>\n<p>Schimbarea mentalit\u0103\u021bii \u00een leg\u0103tur\u0103 cu necesitatea metricilor ar trebui s\u0103 aib\u0103 loc nu doar \u00een r\u00e2ndul dezvoltatorilor, ci \u0219i al inginerilor sistemici.<\/p>\n<p>Pentru orice inginer sistemic care trebuie nu doar s\u0103 reac\u021bioneze la evenimente critice, ci \u0219i s\u0103 garanteze absen\u021ba acestora, lipsa metricilor reprezint\u0103 de obicei un obstacol.<\/p>\n<p>Cu toate acestea, inginerii sistemici nu se scufund\u0103 de obicei \u00een cod, c\u00e2\u0219tig\u00e2nd bani pentru compania lor. Au nevoie de dezvoltatori seniori care \u00een\u021beleg importan\u021ba responsabilit\u0103\u021bii inginerului sistemic \u00een identificarea problemelor, sporirea con\u0219tientiz\u0103rii asupra problemelor de performan\u021b\u0103 \u0219i a\u0219a mai departe.<\/p>\n<h2>Aceast\u0103 chestiune devops<\/h2>\n<p>\nMentalitatea devops descrie sinergia g\u00e2ndirii dezvoltatorilor (dev) \u0219i a opera\u021biunilor (ops). Orice companie care afirm\u0103 c\u0103 \u201efac devops\u201d ar trebui s\u0103:<\/p>\n<ol>\n<li>spun\u0103 ceea ce probabil c\u0103 nu fac (aluzie la un meme din filmul \u201ePrin\u021besa-nea\u0219teptat\u0103\u201d \u2014 \u201eNu cred c\u0103 \u00eenseamn\u0103 ceea ce crezi c\u0103 \u00eenseamn\u0103!\u201d)<\/li>\n<li>\u00eencurajeze o pozi\u021bie de \u00eembun\u0103t\u0103\u021bire continu\u0103 a produsului.<\/li>\n<\/ol>\n<p>\nNu po\u021bi \u00eembun\u0103t\u0103\u021bi un produs \u0219i \u0219tii c\u0103 a fost \u00eembun\u0103t\u0103\u021bit, dac\u0103 nu \u0219tii cum func\u021bioneaz\u0103 \u00een prezent. Nu vei putea \u00een\u021belege cum func\u021bioneaz\u0103 produsul, dac\u0103 nu \u00een\u021belegi cum func\u021bioneaz\u0103 componentele sale, serviciile de care depinde, punctele sale critice \u0219i colturile \u00eentunecate.<br \/>\nDac\u0103 nu observa\u021bi poten\u021bialele puncte slabe, nu ve\u021bi putea aplica tehnica \u201eCinci de ce\u201d \u00een scrierea unui Postmortem. Nu ve\u021bi putea aduna totul pe un singur ecran pentru a vedea cum func\u021bioneaz\u0103 produsul sau pentru a \u00een\u021belege cum arat\u0103 \u201enormal \u0219i fericit\u201d.<\/p>\n<h2>Shift la st\u00e2nga, \u00ceN ST\u00c2NGA, AM SPUS, ST\u00c2\u00c2\u00c2\u00c2\u00c2NGAAAA\u2014 <\/h2>\n<p>\nPentru mine, unul dintre principiile cheie ale Devops este \u201eShift la st\u00e2nga\u201d (shift left). \u00cen acest context, shift la st\u00e2nga \u00eenseamn\u0103 mutarea capacit\u0103\u021bii (<b>nu a responsabilit\u0103\u021bii<\/b>, ci doar a capacit\u0103\u021bii) de a face lucruri care sunt de obicei preocup\u0103rile inginerilor de sistem, cum ar fi crearea metricilor de performan\u021b\u0103, utilizarea mai eficient\u0103 a logurilor etc., \u00een st\u00e2nga ciclului de via\u021b\u0103 al livr\u0103rii software-ului (Software Delivery Life Cycle).<\/p>\n<p><img decoding=\"async\" alt=\"De ce inginerii nu se \u00eengrijesc de monitorizarea aplica\u021biilor?\" src=\"\/wp-content\/uploads\/2019\/05\/11d59b1a5dc14b88b7376accb5f7d686.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Autor foto <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> pe <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>Dezvoltatorii de software trebuie s\u0103 aib\u0103 capacitatea de a folosi \u0219i de a cunoa\u0219te uneltele de monitorizare utilizate de companie, pentru a efectua monitorizarea \u00een toate formele sale, metrici, logare, interfe\u021be de monitorizare \u0219i, cel mai important, <i>a observa cum func\u021bioneaz\u0103 produsul lor \u00een produc\u021bie<\/i>. Nu pute\u021bi for\u021ba dezvoltatorii s\u0103 investeasc\u0103 energie \u0219i timp \u00een monitorizare, at\u00e2ta vreme c\u00e2t nu pot vedea metricile \u0219i influen\u021ba modul \u00een care acestea arat\u0103, cum le va prezenta proprietarul produsului CTO-ului la urm\u0103toarea \u00eent\u00e2lnire etc.<\/p>\n<h2>Pe scurt<\/h2>\n<p><\/p>\n<ol>\n<li>Pute\u021bi aduce calul la ap\u0103. Ar\u0103ta\u021bi dezvoltatorilor c\u00e2te probleme pot evita, ajuta\u021bi-i s\u0103 identifice KPI-urile \u0219i metricile corecte pentru aplica\u021biile lor, astfel \u00eenc\u00e2t s\u0103 fie mai pu\u021bin\u0103 agita\u021bie din partea proprietarului produsului, care este certat de directorul tehnic (CTO). Scoate\u021bi-i la lumin\u0103, cu bl\u00e2nde\u021be \u0219i calm. Dac\u0103 nu reu\u0219i\u021bi, atunci \u00eencerca\u021bi s\u0103-i mitui\u021bi, amenin\u021ba\u021bi sau convinge\u021bi fie pe ei, fie pe proprietarul produsului, pentru a implementa c\u00e2t mai repede ob\u021binerea acestor metrici din aplica\u021bii, apoi s\u0103 desena\u021bi diagrame. Va fi dificil, deoarece nu va fi considerat o prioritate, iar \u00een foaia de parcurs a produsului vor exista multe proiecte \u00een a\u0219teptare de implementare care genereaz\u0103 venituri. A\u0219adar, va trebui s\u0103 ave\u021bi o justificare economic\u0103 pentru a justifica timpul \u0219i resursele cheltuite pe implementarea monitoriz\u0103rii \u00een produs.<\/li>\n<li>Ajuta inginerii sistemelor s\u0103 se odihneasc\u0103. Arat\u0103-le c\u0103 utilizarea unui checklist pentru \u201elansarea unui produs\u201d este benefic\u0103 pentru orice produs care este lansat. Verificarea faptului c\u0103 toate aplica\u021biile din produc\u021bie sunt monitorizate cu metrici va ajuta la asigurarea unui somn s\u0103n\u0103tos pe timp de noapte, permi\u021b\u00e2nd dezvoltatorilor s\u0103 observe ce nu func\u021bioneaz\u0103 corect. Cu toate acestea, cel mai bun mod de a irita \u0219i a stresa un dezvoltator, un proprietar de produs sau un director tehnic este s\u0103 se opun\u0103 constant. Un astfel de comportament va afecta data lans\u0103rii oric\u0103rui produs, a\u0219a c\u0103, dac\u0103 este nevoie, apuc\u0103-te de planificarea acestora c\u00e2t mai devreme. Dac\u0103 este necesar, particip\u0103 la \u00eent\u00e2lnirile dedicate produsului. Poart\u0103 must\u0103\u021bi false \u0219i o p\u0103l\u0103rie din fetru sau ceva de genul \u0103sta, nu te va dezam\u0103gi niciodat\u0103. Adu problemele tale \u00een discu\u021bie, arat\u0103 avantajele evidente \u0219i propov\u0103duie\u0219te.<\/li>\n<li>Asigur\u0103-te c\u0103 at\u00e2t dezvoltatorii (dev), c\u00e2t \u0219i echipa de operare (ops) \u00een\u021beleg semnifica\u021bia \u0219i consecin\u021bele trecerii metricilor produsului \u00een \u201ezona ro\u0219ie\u201d. Nu l\u0103sa echipa de operare s\u0103 fie singurul gardian al func\u021bion\u0103rii produsului, asigur\u0103-te c\u0103 \u0219i dezvoltatorii sunt implica\u021bi \u00een acest (#productsquads).<\/li>\n<li>Jurnalele sunt grozave, dar \u0219i metricile. Combin\u0103-le \u0219i nu l\u0103sa jurnalele tale s\u0103 devin\u0103 gunoi \u00eentr-o sfer\u0103 imens\u0103 de inutilitate. Explic\u0103-le \u0219i arat\u0103-le dezvoltatorilor de ce nimeni \u00een afar\u0103 de ei nu \u00ee\u0219i va da seama de jurnalele lor, arat\u0103-le cum este s\u0103 prive\u0219ti jurnalele inutile la 3:15 diminea\u021ba.<\/li>\n<\/ol>\n<p>\n<img decoding=\"async\" alt=\"De ce inginerii nu se \u00eengrijesc de monitorizarea aplica\u021biilor?\" src=\"\/wp-content\/uploads\/2019\/05\/e4c9a0523d1e85158174c2e0e2608efa.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nAutor foto <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> pe <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>Asta e tot. Materialul nou va fi lansat s\u0103pt\u0103m\u00e2na viitoare. Dac\u0103 vrei s\u0103 afli mai multe despre curs, te invit\u0103m la <noindex><a rel=\"nofollow\" href=\"https:\/\/otus.pw\/Ux8s\/\">ziua por\u021bilor deschise<\/a><\/noindex>, care va avea loc deja luni. \u0218i acum a\u0219tept\u0103m, ca de obicei, comentariile tale.<br \/>\n<br \/>Sursa: <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 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u0441\u0435\u0445 \u0441 \u043f\u044f\u0442\u043d\u0438\u0446\u0435\u0439!\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/pochemu-inzhenery-ne-zabotyatsya-o-monitoringe-prilozhenij\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.2.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"ro_RO\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u041f\u043e\u0447\u0435\u043c\u0443 \u0438\u043d\u0436\u0435\u043d\u0435\u0440\u044b \u043d\u0435 \u0437\u0430\u0431\u043e\u0442\u044f\u0442\u0441\u044f \u043e \u043c\u043e\u043d\u0438\u0442\u043e\u0440\u0438\u043d\u0433\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439? 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