{"id":35486,"date":"2019-10-31T22:04:36","date_gmt":"2019-10-31T19:04:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vypusk-http-tcp-balansirovshhika-haproxy-2-0\/"},"modified":"2019-10-31T22:04:36","modified_gmt":"2019-10-31T19:04:36","slug":"vypusk-http-tcp-balansirovshhika-haproxy-2-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/vypusk-http-tcp-balansirovshhika-haproxy-2-0","title":{"rendered":"Uscita del bilanciatore HTTP\/TCP HAProxy 2.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.haproxy.com\/blog\/haproxy-2-0-and-beyond\/\">Pubblicato<\/a><\/noindex> rilascio del bilanciatore di carico <noindex><a rel=\"nofollow\" href=\"http:\/\/www.haproxy.org\">HAProxy 2.0<\/a><\/noindex>, che consente di distribuire il traffico HTTP e le richieste TCP arbitrarie tra un gruppo di server, tenendo conto di numerosi fattori (ad esempio, verifica la disponibilit\u00e0 dei server, valuta il carico, include mezzi per contrastare attacchi DDoS) e svolge una prima filtrazione dei dati (ad esempio, \u00e8 possibile analizzare le intestazioni HTTP, filtrare la trasmissione di parametri di richiesta non validi, bloccare l'iniezione SQL e XSS, connettere agenti di elaborazione dei contenuti). HAProxy pu\u00f2 anche <noindex><a rel=\"nofollow\" href=\"https:\/\/www.haproxy.com\/solutions\/microservices\/\">essere utilizzato<\/a><\/noindex> per coordinare l'interazione dei componenti nei sistemi basati su architettura a microservizi. Il codice del progetto \u00e8 scritto in linguaggio C e <noindex><a rel=\"nofollow\" href=\"http:\/\/git.haproxy.org\/\">\u00e8 distribuito<\/a><\/noindex> sotto licenza GPLv2. Il progetto \u00e8 utilizzato su molti grandi siti, tra cui Airbnb, Alibaba, GitHub, Imgur, Instagram, Reddit, StackOverflow, Tumblr, Twitter e Vimeo.<\/p>\n<p>Caratteristiche principali del rilascio:<\/p>\n<ul>\n<li class=\"l\"> \u00c8 stata introdotta una nuova API <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/haproxytech\/dataplaneapi\">Piano Dati<\/a><\/noindex>, che consente di gestire le impostazioni di HAProxy al volo tramite REST Web API. Include la possibilit\u00e0 di aggiungere e rimuovere dinamicamente backend e server, creare ACL, modificare la routazione delle richieste, modificare i binding dei gestori a IP;\n<li class=\"l\"> \u00c8 stata aggiunta la direttiva nbthread, che consente di configurare il numero di thread utilizzati in HAProxy per ottimizzare l'uso delle CPU multi-core. Per impostazione predefinita, il numero di thread lavoratori viene scelto in base ai core CPU disponibili nell'ambiente attuale e, negli ambienti cloud, viene impostato su un thread. Sono state aggiunte opzioni di compilazione MAX_THREADS e MAX_PROCS per impostare limiti rigidi, limitando il numero massimo di thread e processi.\n<li class=\"l\"> Semplificato l'uso della direttiva bind per collegare i gestori agli indirizzi di rete. Nella configurazione non \u00e8 pi\u00f9 necessario definire i parametri del processo: per impostazione predefinita, le connessioni verranno distribuite ai thread in base al numero di connessioni attive.\n<li class=\"l\"> Semplificata la configurazione dei log durante l'avvio in contenitori isolati: ora \u00e8 possibile indirizzare il log in stdout e stderr, nonch\u00e9 in qualsiasi descrittore di file esistente (ad esempio, \u00ablog fd@1 local0\u00bb);\n<li class=\"l\"> La supporto HTX (Rappresentazione HTTP Nativa) \u00e8 abilitato di default, consentendo il bilanciamento quando si utilizzano funzionalit\u00e0 avanzate come HTTP\/2 end-to-end, ritentativi Layer 7 e gRPC. HTX non sostituisce gli header in loco, ma riduce l'operazione di modifica all'eliminazione e all'aggiunta di un nuovo header alla fine della lista, il che consente di manipolare qualsiasi variante avanzata del protocollo HTTP, mantenendo la semantica originale degli header e permettendo prestazioni pi\u00f9 elevate nella traduzione da HTTP\/2 a HTTP\/1.1 e viceversa;\n<li class=\"l\"> Aggiunta la supporto ufficiale per la modalit\u00e0 End-to-End HTTP\/2 (gestione di tutte le fasi in HTTP\/2, comprese le richieste al backend, non solo l'interazione tra proxy e client);\n<li class=\"l\"> \u00c8 stata implementata il supporto completo per il proxying bidirezionale del protocollo gRPC, con la possibilit\u00e0 di analizzare i flussi gRPC, separando i singoli messaggi, registrando il traffico gRPC nei log e filtrando i messaggi tramite ACL. gRPC consente di organizzare il funzionamento dei microservizi in diversi linguaggi di programmazione, che interagiscono tra loro tramite un'API universale. L'interazione di rete in gRPC \u00e8 implementata sopra il protocollo HTTP\/2 e si basa sull'uso di Protocol Buffers per la serializzazione dei dati.\n<li class=\"l\"> Aggiunta la supporto alla modalit\u00e0 \u00abLayer 7 Retries\u00bb, che consente di inviare nuovamente le richieste HTTP in caso di errori software non legati a problemi di connessione di rete (ad esempio, in assenza di risposta o risposta vuota a una richiesta POST). Per disattivare la modalit\u00e0, \u00e8 stato aggiunto il flag \u00abdisable-l7-retry\u00bb all'opzione \u00abhttp-request\u00bb; per una configurazione pi\u00f9 dettagliata, sono state introdotte opzioni \u00abretry-on\u00bb nelle sezioni defaults, listen e backend. I seguenti indicatori sono disponibili per l'invio ripetuto: all-retryable-errors, none, conn-failure, empty-response, junk-response, response-timeout, 0rtt-rejected, e anche associati ai codici di stato restituiti (404, ecc.);\n<li class=\"l\"> \u00c8 stato implementato un nuovo gestore dei processi (Process Manager) che consente di configurare l'invocazione di file eseguibili esterni con gestori per HAProxy.<br \/>\nAd esempio, un gestore esterno \u00e8 stato realizzato per l'API Data Plan (\/usr\/sbin\/dataplaneapi), insieme a vari motori di offload per il trattamento dei flussi;<\/p>\n<li class=\"l\"> Per .NET Core, Go, Lua e Python sono stati aggiunti binding per lo sviluppo di estensioni SPOE (Stream Processing Offload Engine) e SPOP (Stream Processing Offload Protocol). In precedenza, era supportato lo sviluppo di estensioni solo in C;\n<li class=\"l\"> \u00c8 stato aggiunto un gestore esterno spoa-mirror (\/usr\/sbin\/spoa-mirror) per lo specchiamento delle richieste su un server separato (ad esempio, per copiare parte del traffico di lavoro per testare un ambiente sperimentale sotto carico reale);\n<li class=\"l\"> Presentato  <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/haproxytech\/kubernetes-ingress\/\">HAProxy Kubernetes Ingress Controller<\/a><\/noindex> per garantire l'integrazione con la piattaforma Kubernetes;\n<li class=\"l\"> \u00c8 stato aggiunto il supporto integrato per l'esportazione delle statistiche nel sistema di monitoraggio. <noindex><a rel=\"nofollow\" href=\"https:\/\/prometheus.io\/\">Prometheus<\/a><\/noindex>;\n<li class=\"l\"> \u00c8 stato ampliato il protocollo Peers Protocol, utilizzato per lo scambio di informazioni con altri nodi HAProxy. \u00c8 stata aggiunta anche la supporto per Heartbeat e la trasmissione sicura dei dati;\n<li class=\"l\"> Nella direttiva &#171;log&#187; \u00e8 stato aggiunto il parametro &#171;sample&#187;, che consente di registrare solo una parte delle richieste, ad esempio 1 su 10, per la creazione di un campione analitico;\n<li class=\"l\"> \u00c8 stata aggiunta la modalit\u00e0 di profilazione automatica (direttiva profiling.tasks, che pu\u00f2 assumere i valori auto, on e off). La profilazione automatica si attiva nel caso in cui la latenza media superi il limite di 1000 ms. Per visualizzare i dati di profilazione, \u00e8 stato aggiunto nel Runtime API il comando &#171;show profiling&#187; oppure \u00e8 possibile azzerare le statistiche nel log;\n<li class=\"l\"> \u00c8 stato aggiunto il supporto per l'accesso ai server backend utilizzando il protocollo SOCKS4;\n<li class=\"l\"> \u00c8 stata aggiunta il supporto end-to-end per il meccanismo di apertura rapida delle connessioni TCP (TFO \u2014 TCP Fast Open, RFC 7413), che consente di ridurre il numero di passaggi per l'instaurazione della connessione combinando in una sola richiesta i primi due passaggi del classico processo di negoziazione della connessione a 3 fasi e permette l'invio di dati nella fase iniziale dell'instaurazione della connessione;\n<li class=\"l\"> Sono state aggiunte nuove azioni:\n<ul>\n<li class=\"l\"> &#171;http-request replace-uri&#187; per la sostituzione dell'URL utilizzando espressioni regolari;\n<li class=\"l\"> &#171;tcp-request content do-resolve&#187; e &#171;http-request do-resolve&#187; per la risoluzione del nome host;\n<li class=\"l\">  \u00abtcp-request content set-dst\u00bb e \u00abtcp-request content set-dst-port\u00bb per sostituire l'indirizzo IP e la porta di destinazione.\n<\/ul>\n<li class=\"l\"> Aggiunti nuovi moduli di conversione:\n<ul>\n<li class=\"l\"> aes_gcm_dev per la decrittazione dei flussi utilizzando gli algoritmi AES128-GCM, AES192-GCM e AES256-GCM;\n<li class=\"l\"> protobuf per l'estrazione dei campi dai messaggi dei Protocol Buffers;\n<li class=\"l\"> ungrpc per l'estrazione dei campi dai messaggi gRPC.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50904\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0431\u0430\u043b\u0430\u043d\u0441\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438 HAProxy 2.0, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0442\u044c HTTP-\u0442\u0440\u0430\u0444\u0438\u043a \u0438 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0435 TCP-\u0437\u0430\u043f\u0440\u043e\u0441\u044b \u043c\u0435\u0436\u0434\u0443 \u0433\u0440\u0443\u043f\u043f\u043e\u0439 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432, \u0443\u0447\u0438\u0442\u044b\u0432\u0430\u044f \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u043e \u0444\u0430\u043a\u0442\u043e\u0440\u043e\u0432 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u0440\u043e\u0432\u0435\u0440\u044f\u0435\u0442 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0441\u0442\u044c \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432, \u043e\u0446\u0435\u043d\u0438\u0432\u0430\u0435\u0442 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438, \u0438\u043c\u0435\u0435\u0442 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \u043f\u0440\u043e\u0442\u0438\u0432\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f DDoS) \u0438 \u043f\u0440\u043e\u0432\u043e\u0434\u0438\u0442 \u043f\u0435\u0440\u0432\u0438\u0447\u043d\u0443\u044e \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u044e \u0434\u0430\u043d\u043d\u044b\u0445 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043c\u043e\u0436\u043d\u043e \u0440\u0430\u0437\u0431\u0438\u0440\u0430\u0442\u044c HTTP-\u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0438, \u043e\u0442\u0444\u0438\u043b\u044c\u0442\u0440\u043e\u0432\u044b\u0432\u0430\u0442\u044c \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0443 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u044b\u0445 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432 \u0437\u0430\u043f\u0440\u043e\u0441\u0430, \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0434\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0443 SQL \u0438 XSS, \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0430\u0442\u044c \u0430\u0433\u0435\u043d\u0442\u044b \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043a\u043e\u043d\u0442\u0435\u043d\u0442\u0430). HAProxy \u0442\u0430\u043a\u0436\u0435 \u043c\u043e\u0436\u0435\u0442 [&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":[702],"tags":[],"class_list":["post-35486","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0431\u0430\u043b\u0430\u043d\u0441\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438 HAProxy 2.0, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u044f\u0442\u044c HTTP-\u0442\u0440\u0430\u0444\u0438\u043a \u0438 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0435 TCP-\u0437\u0430\u043f\u0440\u043e\u0441\u044b \u043c\u0435\u0436\u0434\u0443 \u0433\u0440\u0443\u043f\u043f\u043e\u0439 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432, \u0443\u0447\u0438\u0442\u044b\u0432\u0430\u044f \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u043e \u0444\u0430\u043a\u0442\u043e\u0440\u043e\u0432 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043f\u0440\u043e\u0432\u0435\u0440\u044f\u0435\u0442 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0441\u0442\u044c \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432, \u043e\u0446\u0435\u043d\u0438\u0432\u0430\u0435\u0442 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043d\u0430\u0433\u0440\u0443\u0437\u043a\u0438, \u0438\u043c\u0435\u0435\u0442 \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \u043f\u0440\u043e\u0442\u0438\u0432\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f DDoS) \u0438 \u043f\u0440\u043e\u0432\u043e\u0434\u0438\u0442 \u043f\u0435\u0440\u0432\u0438\u0447\u043d\u0443\u044e \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u044e \u0434\u0430\u043d\u043d\u044b\u0445 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043c\u043e\u0436\u043d\u043e \u0440\u0430\u0437\u0431\u0438\u0440\u0430\u0442\u044c HTTP-\u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0438, \u043e\u0442\u0444\u0438\u043b\u044c\u0442\u0440\u043e\u0432\u044b\u0432\u0430\u0442\u044c \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0443 \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u044b\u0445 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432 \u0437\u0430\u043f\u0440\u043e\u0441\u0430, \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0434\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0443 SQL \u0438 XSS, \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0430\u0442\u044c \u0430\u0433\u0435\u043d\u0442\u044b \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043a\u043e\u043d\u0442\u0435\u043d\u0442\u0430). 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