{"id":34383,"date":"2019-10-31T21:58:01","date_gmt":"2019-10-31T18:58:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/sistemy-monitoringa-trafika-v-setyah-voip-chast-vtoraya-printsipy-organizatsii\/"},"modified":"2019-10-31T21:58:01","modified_gmt":"2019-10-31T18:58:01","slug":"sistemy-monitoringa-trafika-v-setyah-voip-chast-vtoraya-printsipy-organizatsii","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/administrirovanie\/sistemy-monitoringa-trafika-v-setyah-voip-chast-vtoraya-printsipy-organizatsii","title":{"rendered":"Sisteme de monitorizare a traficului \u00een re\u021belele VoIP. Partea a doua \u2014 principii de organizare","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Salut, colegi!<\/p>\n<p>\u00cen <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/434002\/\">anterior<\/a><\/noindex> \u00een materialul anterior, ne-am familiarizat cu un element foarte util \u0219i, dup\u0103 cum se poate observa, destul de necesar al infrastructurii VoIP, \u0219i anume sistemul de monitorizare a traficului, sau, pe scurt, SMT. Am aflat ce este, ce probleme rezolv\u0103 \u0219i am men\u021bionat cei mai de seam\u0103 reprezentan\u021bi, prezenta\u021bi dezvoltatorilor lumii IT. \u00cen aceast\u0103 parte, vom analiza principiile conform c\u0103rora se realizeaz\u0103 implementarea SMT \u00een infrastructura IT \u0219i monitorizarea traficului VoIP prin intermediul acesteia.<\/p>\n<p><img decoding=\"async\" alt=\"Sisteme de monitorizare a traficului \u00een re\u021belele VoIP. Partea a doua \u2014 principii de organizare\" src=\"\/wp-content\/uploads\/259093cd1f25d777afae57d136384f0e.png\" style=\"display:block;margin: 0 auto;\" \/><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h3>Arhitectura sistemelor de monitorizare a traficului VoIP<\/h3>\n<p><i>Am construit, am construit \u0219i \u00een sf\u00e2r\u0219it am terminat. Ura!<br \/>\nDin desenele animate \u00abCheburashka \u0219i crocodilul Gena\u00bb.<br \/>\n<\/i><br \/>\nDup\u0103 cum s-a men\u021bionat anterior, \u00een industria comunic\u0103rii \u0219i telecomunica\u021biilor exist\u0103 suficient de multe produse care apar\u021bin categoriei respective. Cu toate acestea, dac\u0103 ne ab\u021binem de la nume, dezvoltator, platform\u0103 etc., putem observa c\u0103 toate sunt mai mult sau mai pu\u021bin similare din punct de vedere al arhitecturii lor (cel pu\u021bin cele cu care autorul s-a confruntat). Este important de men\u021bionat c\u0103 acest lucru se datoreaz\u0103, de fapt, lipsei unor alte metode de captare a traficului de la elementele re\u021belei pentru o analiz\u0103 detaliat\u0103 ulterioar\u0103. Aceasta, de asemenea, este, din punctul de vedere subiectiv, mai mult determinat\u0103 de dezvoltarea actual\u0103 a diverselor domenii din industrie. Pentru o mai bun\u0103 \u00een\u021belegere, s\u0103 examin\u0103m urm\u0103toarea analogie.<\/p>\n<p>De la momentul \u00een care marele savant rus Vladimir Alexandrovich Kotelnikov a creat teorema de quantificare, umanitatea a ob\u021binut oportunitatea grandioas\u0103 de a efectua conversii analogico-digitale \u0219i digitano-analogice ale semnalelor de voce, gra\u021bie c\u0103rora putem utiliza pe deplin un tip remarcabil de comunicare, cum ar fi telefonia IP. Dac\u0103 ne uit\u0103m la dezvoltarea mecanismelor de procesare a semnalelor de voce (cunoscu\u021bi \u0219i sub numele de algoritmi, codec-uri, metode de codificare etc.), putem observa cum DSP (procesarea digital\u0103 a semnalelor) a realizat un salt fundamental \u00een codificarea mesajelor informa\u021bionale - implementarea capacit\u0103\u021bii de predic\u021bie a semnalului vocal. Asta \u00eenseamn\u0103 c\u0103, \u00een loc de simpla digitizare \u0219i utilizarea legilor de compresie a- \u0219i u- (G.711A\/G.711U), exist\u0103 acum posibilitatea de a transmite doar o parte a cuantific\u0103rilor, cu restabilirea ulterioar\u0103 a \u00eentregului mesaj din acestea, ceea ce economise\u0219te semnificativ l\u0103\u021bimea de band\u0103. Revenind la tema SMT-ului, trebuie remarcat c\u0103, \u00een prezent, nu exist\u0103 schimb\u0103ri calitative similare \u00een abordarea capt\u0103rii traficului, \u00een afar\u0103 de diverse forme de mirror-ing.<\/p>\n<p>S\u0103 ne referim la figura prezentat\u0103 mai jos, care ilustreaz\u0103 ceea ce a fost construit de speciali\u0219tii din domeniile respective.<\/p>\n<p><img decoding=\"async\" alt=\"Sisteme de monitorizare a traficului \u00een re\u021belele VoIP. Partea a doua \u2014 principii de organizare\" src=\"\/wp-content\/uploads\/7a2ee32b178195df541d094141edb219.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nFigura 1. Schema general\u0103 a arhitecturii SMT.<\/p>\n<p>Practic, orice SMT const\u0103 din dou\u0103 componente principale: servere \u0219i agen\u021bi de captare a traficului (sau probe). Serverul se ocup\u0103 cu primirea, procesarea \u0219i stocarea traficului VoIP, care provine de la agen\u021bi, \u0219i, de asemenea, ofer\u0103 speciali\u0219tilor posibilitatea de a lucra cu informa\u021biile primite \u00een diverse reprezent\u0103ri (grafice, diagrame, Call Flow etc). Agen\u021bii de captare prime\u0219te traficul VoIP de la echipamentele nucleului re\u021belei (de exemplu, SBC, softswitch-uri, gateway-uri etc.), \u00eel transform\u0103 \u00eentr-un format utilizat de software-ul aplicat pe serverul sistemului \u0219i \u00eel transmit acestuia pentru manipul\u0103ri ulterioare.<\/p>\n<p>Asemenea compozitorilor care creeaz\u0103 varia\u021bii pe teme muzicale, \u00een acest caz sunt posibile diferite variante de implementare a schemei prezentate. Diversitatea acestora este considerabil\u0103 \u0219i se determin\u0103 \u00een principal prin caracteristicile infrastructurii \u00een care se desf\u0103\u0219oar\u0103 SMT. Cea mai frecvent \u00eent\u00e2lnit\u0103 variant\u0103 este aceea \u00een care nu se instaleaz\u0103 \u0219i nu se configureaz\u0103 agen\u021bi de captare. \u00cen acest caz, traficul analizat este direc\u021bionat direct c\u0103tre <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/ro\/server\/dts-shicago\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2851\">server<\/a> sau, de exemplu, serverul prime\u0219te informa\u021biile necesare din fi\u0219ierele pcap generate de obiectele de monitorizare. Aceast\u0103 metod\u0103 de livrare este, de obicei, aleas\u0103 \u00een cazul \u00een care nu exist\u0103 posibilitatea instal\u0103rii senzorilor. Loca\u021bia echipamentului, lipsa resurselor de virtualizare, deficien\u021bele \u00een organizarea re\u021belei IP de transport \u0219i, ca urmare, problemele cu conectivitatea re\u021belei etc., toate acestea pot reprezenta motive pentru alegerea variantei de organizare a monitoriz\u0103rii men\u021bionate.<\/p>\n<p>Dup\u0103 ce am \u00een\u021beles cum poate fi implementat\u0103 SMT \u00een infrastructura IT din punct de vedere arhitectural, vom analiza aspectele mai relevante pentru administratorii de sistem, \u0219i anume, metodele de desf\u0103\u0219urare a software-urilor sistemelor pe servere.<\/p>\n<p>\u00cen timpul preg\u0103tirii solu\u021biei pentru implementarea componentelor de re\u021bea de monitorizare, executan\u021bii au \u00eentotdeauna multe \u00eentreb\u0103ri. De exemplu, care ar trebui s\u0103 fie configura\u021bia hardware a serverului, este suficient\u0103 instalarea tuturor componentelor sistemului pe un singur gazd\u0103 sau ar fi mai bine s\u0103 le separ\u0103m, cum ar trebui s\u0103 se efectueze instalarea software-ului etc. Problemele enumerate mai sus, precum \u0219i multe alte \u00eentreb\u0103ri conexe, sunt foarte vaste, iar r\u0103spunsurile la multe dintre ele depind \u00eentr-adev\u0103r de condi\u021biile specifice de operare (sau proiectare). Cu toate acestea, ne vom str\u0103dui s\u0103 generaliz\u0103m specificul pentru a ob\u021bine o imagine de ansamblu \u0219i o \u00een\u021belegere a acestui aspect al desf\u0103\u0219ur\u0103rii SMT.<\/p>\n<p>A\u0219adar, primul lucru care intereseaz\u0103 \u00eentotdeauna speciali\u0219tii atunci c\u00e2nd implementeaz\u0103 SMT este cu ce specifica\u021bii tehnice s\u0103 foloseasc\u0103 serverul? Av\u00e2nd \u00een vedere r\u0103sp\u00e2ndirea larg\u0103 a software-ului liber, aceast\u0103 \u00eentrebare este pus\u0103 at\u00e2t de des, \u00eenc\u00e2t probabil poate fi comparat\u0103 cu \u00eentrebarea \u201eCe s\u0103 fac?\u201d adresat\u0103 de Nikolai Gavrilovich Cern\u00ee\u0219evski\u2026 Factorul principal care influen\u021beaz\u0103 r\u0103spunsul este num\u0103rul de sesiuni media care sunt procesate sau vor fi procesate de platforma telefonic\u0103. Caracteristica cuantificabil\u0103 \u0219i tangibil\u0103 care ofer\u0103 o evaluare concret\u0103 a acestui factor este parametrul CAPS (Call Attempts Per Second) sau num\u0103rul de apeluri pe secund\u0103. Necesitatea de a r\u0103spunde la aceast\u0103 \u00eentrebare este \u00een primul r\u00e2nd determinat\u0103 de faptul c\u0103 informa\u021biile despre sesiuni, direc\u021bionate c\u0103tre sistem, vor crea \u00eenc\u0103rc\u0103tura pe serverul s\u0103u.<\/p>\n<p>A doua \u00eentrebare care apare \u00een timpul lu\u0103rii deciziei privind caracteristicile componentelor hardware ale serverului este compunerea software-ului (medii opera\u021bionale, baze de date etc.) care va func\u021biona pe acesta. Traficul semnal (sau media) ajunge pe server, unde este procesat (analiza mesajelor de semnal) de c\u0103tre o aplica\u021bie (de exemplu, Kamailio), iar informa\u021biile generate \u00eentr-un mod specific sunt plasate \u00een baza de date. Pentru diferitele SMT-uri, at\u00e2t aplica\u021biile care efectueaz\u0103 defragmentarea unit\u0103\u021bilor de semnal, c\u00e2t \u0219i aplica\u021biile care asigur\u0103 stocarea, pot varia. Totu\u0219i, toate acestea sunt unite prin natura lor de multithreading. \u00cen aceast\u0103 privin\u021b\u0103, din cauza particularit\u0103\u021bilor unui element de infrastructur\u0103, cum ar fi SMT, trebuie s\u0103 subliniem c\u0103 num\u0103rul opera\u021biunilor de scriere pe disc dep\u0103\u0219e\u0219te semnificativ num\u0103rul opera\u021biunilor de citire de pe acesta.<\/p>\n<p>\u0218i \u00een sf\u00e2r\u0219it\u2026 \u201eCe mult \u00eenseamn\u0103 acest cuv\u00e2nt\u201d: server, virtualizare, containerizare\u2026 Ultimul, dar foarte important aspect abordat \u00een aceast\u0103 parte a articolului este posibilele metode de instalare a componentelor SMT \u00een timpul desf\u0103\u0219ur\u0103rii sale. Tehnologiile men\u021bionate l\u00e2ng\u0103 citatul din oper\u0103 nemuritoare a lui A.S. Pu\u0219kin sunt larg r\u0103sp\u00e2ndite \u00een diverse infrastructuri \u0219i proiecte. Pe de o parte, ele sunt str\u00e2ns interconectate \u00eentre ele, iar pe de alt\u0103 parte, se deosebesc semnificativ pe multe criterii. Cu toate acestea, toate sunt, \u00eentr-o form\u0103 sau alta, disponibile dezvoltatorilor ca op\u021biuni de instalare a produselor lor. Generaliz\u00e2nd pentru sistemele enumerate \u00een prima parte a articolului, vom men\u021biona urm\u0103toarele metode de desf\u0103\u0219urare pe un server fizic sau pe o ma\u0219in\u0103 virtual\u0103:<br \/>\n \u2014 utilizarea scenariilor de instalare automat\u0103 sau instalarea manual\u0103 cu configurarea ulterioar\u0103 a software-ului corespunz\u0103tor,<br \/>\n \u2014 utilizarea unei imagini de sistem de operare gata preg\u0103tit\u0103 cu software-ul SMT \u0219i\/sau agentul preinstalat,<br \/>\n \u2014 utilizarea tehnologiei de containerizare (Docker).<\/p>\n<p>Mijloacele enumerate pentru instalare au avantajele \u0219i dezavantajele lor, iar speciali\u0219tii au preferin\u021bele, restric\u021biile \u0219i condi\u021biile specifice \u00een care se afl\u0103 infrastructura exploatat\u0103 sau implementat\u0103 pentru a formula orice recomand\u0103ri. Pe de alt\u0103 parte, descrierea c\u0103ilor de desf\u0103\u0219urare a sistemelor de monitorizare a traficului SIP este destul de clar\u0103, iar \u00een acest stadiu nu necesit\u0103 o analiz\u0103 mai detaliat\u0103.<\/p>\n<p>A\u0219a a rezultat \u00eenc\u0103 un articol dedicat unui element important \u0219i interesant al re\u021belei VoIP \u2013 sistemul de monitorizare a traficului SIP. Ca de obicei, mul\u021bumesc cititorilor pentru aten\u021bia acordat\u0103 acestui material! \u00cen urm\u0103toarea parte, vom \u00eencerca s\u0103 ne aprofund\u0103m \u0219i mai mult \u00een detalii \u0219i s\u0103 examin\u0103m produsele HOMER SIP Capture \u0219i SIP3.<br \/>\n<br \/>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/453216\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0417\u0434\u0440\u0430\u0432\u0441\u0442\u0432\u0443\u0439\u0442\u0435, \u043a\u043e\u043b\u043b\u0435\u0433\u0438! \u0412 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u043c \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u0435 \u043c\u044b \u043f\u043e\u0437\u043d\u0430\u043a\u043e\u043c\u0438\u043b\u0438\u0441\u044c \u0441 \u0442\u0430\u043a\u0438\u043c \u043f\u043e\u043b\u0435\u0437\u043d\u044b\u043c \u0438, \u043a\u0430\u043a \u043c\u043e\u0436\u043d\u043e \u0437\u0430\u043c\u0435\u0442\u0438\u0442\u044c, \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u043c \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u043e\u043c VoIP-\u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b, \u043a\u0430\u043a \u0441\u0438\u0441\u0442\u0435\u043c\u0430 \u043c\u043e\u043d\u0438\u0442\u043e\u0440\u0438\u043d\u0433\u0430 \u0442\u0440\u0430\u0444\u0438\u043a\u0430 \u0438\u043b\u0438, \u0434\u043b\u044f \u043a\u0440\u0430\u0442\u043a\u043e\u0441\u0442\u0438, \u0421\u041c\u0422. \u0423\u0437\u043d\u0430\u043b\u0438, \u0447\u0442\u043e \u044d\u0442\u043e \u0442\u0430\u043a\u043e\u0435, \u043a\u0430\u043a\u0438\u0435 \u0437\u0430\u0434\u0430\u0447\u0438 \u0440\u0435\u0448\u0430\u0435\u0442, \u0430 \u0442\u0430\u043a\u0436\u0435 \u043e\u0442\u043c\u0435\u0442\u0438\u043b\u0438 \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u044f\u0440\u043a\u0438\u0445 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u0442\u0435\u043b\u0435\u0439, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430\u043c\u0438 \u043c\u0438\u0440\u0443 \u0418\u0422. \u0412 \u0434\u0430\u043d\u043d\u043e\u0439 \u0447\u0430\u0441\u0442\u0438 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u043f\u0440\u0438\u043d\u0446\u0438\u043f\u044b, \u0441\u043e\u0433\u043b\u0430\u0441\u043d\u043e \u043a\u043e\u0442\u043e\u0440\u044b\u043c \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432\u043d\u0435\u0434\u0440\u0435\u043d\u0438\u0435 \u0421\u041c\u0422 \u0432 \u0418\u0422-\u0438\u043d\u0444\u0440\u0430\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0443 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-34383","post","type-post","status-publish","format-standard","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=\"\u0417\u0434\u0440\u0430\u0432\u0441\u0442\u0432\u0443\u0439\u0442\u0435, \u043a\u043e\u043b\u043b\u0435\u0433\u0438! 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