{"id":100938,"date":"2023-02-01T15:01:03","date_gmt":"2023-02-01T14:01:03","guid":{"rendered":"https:\/\/fotc.com\/?p=100938"},"modified":"2023-02-01T15:06:39","modified_gmt":"2023-02-01T14:06:39","slug":"docker-swarm","status":"publish","type":"post","link":"https:\/\/fotc.com\/ro\/blog\/docker-swarm\/","title":{"rendered":"Pentru ce este folosit Docker Swarm?"},"content":{"rendered":"\n<p>V-a\u021bi g\u0103sit vreodat\u0103 \u00een postura \u00een care, dezvolt\u00e2nd o aplica\u021bie, a\u021bi avut de rezolvat numeroase erori doar dup\u0103 implementarea pe server a acesteia? A\u021bi fost vreodat\u0103 obliga\u021bi s\u0103 opri\u021bi furnizarea unui serviciul \u00een timpul implement\u0103rii unui patch? Una dintre solu\u021biile pe care pute\u021bi merge \u00een astfel de cazuri sunt, al\u0103turi de ma\u0219ini virtuale, containerele \u0219i Docker Swarm.<\/p>\n\n\n\n<p>G\u0103si\u021bi \u00een articolul urm\u0103tor informa\u021bii despre ce este Docker Swarm, cum func\u021bioneaz\u0103, cu ce este similar cu Kubernetes \u0219i cum v\u0103 pute\u021bi crea propriul sistem de management de clustere de noduri Docker.&nbsp;<\/p>\n\n\n\n<h2 id=\"h-ce-este-docker-swarm\">Ce este Docker Swarm?<\/h2>\n\n\n\n<p>Pentru companiile care construiesc \u0219i dezvolt\u0103 aplica\u021bii sau sistem IT, scalabilitatea, stabilitatea \u0219i viteza de implementare sunt factori importan\u021bi. Astfel de companii apeleaz\u0103 la containerizare, iar administrarea a mii sau milioane de containere se face printr-o platform\u0103 de orchestrare. Aceasta permite automatiz\u0103ri, gestionare \u00een grup, monitorizare avansat\u0103 sau detectarea \u0219i repararea automat\u0103 a defec\u021biunilor. Iar Docker Swarm este una dintre cele mai populare astfel de platforme de orchestrare.&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img width=\"1024\" height=\"447\" src=\"https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35-1024x447.png\" alt=\"docker containers\" class=\"wp-image-96839\" srcset=\"https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35-1024x447.png 1024w, https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35-300x131.png 300w, https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35-768x336.png 768w, https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35-1536x671.png 1536w, https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35-123x54.png 123w, https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35-142x62.png 142w, https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35-352x154.png 352w, https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35-542x237.png 542w, https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35-26x11.png 26w, https:\/\/fotc.com\/app\/uploads\/2022\/11\/Screenshot-2022-11-29-16.00.35.png 1881w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Docker Swarm ofer\u0103 o interfa\u021b\u0103 unificat\u0103 pentru gestionarea containerelor Docker. Astfel, cu Docker, utilizatorii s\u0103 poat\u0103 trata grupuri de noduri ca pe un singur sistem. Aceast\u0103 abordare simplific\u0103 gestionarea aplica\u021biilor \u0219i permite o scalare facil\u0103 a acestora pe m\u0103sur\u0103 ce nevoile de resurse cresc sau scad.&nbsp;<\/p>\n\n\n\n<p>Swarm are, de asemenea, caracteristici avansate de disponibilitate. Printre acestea, suportul pentru replicarea serviciilor \u0219i configurarea automat\u0103 a disponibilit\u0103\u021bii \u00een cazul c\u0103derii unui nod. Acestea \u00eembun\u0103t\u0103\u021besc fiabilitatea aplica\u021biilor \u0219i reduc downtime-ul \u00een cazul erorilor sau a \u00eentreruperilor.<\/p>\n\n\n\n<h2>Dou\u0103 tipuri de servicii Docker Swarm&nbsp;<\/h2>\n\n\n\n<p>Unul dintre beneficiile lucrului cu Docker Swarm este nivelul mare de disponibilitate pentru aplica\u021bii. Astfel, Docker are dou\u0103 tipuri de servicii: replicate \u0219i globale.&nbsp;<\/p>\n\n\n\n<p>Pentru un serviciu replicat, se specific\u0103 num\u0103rul de task-uri identice (replic\u0103) care trebuie s\u0103 ruleze. Pe de alt\u0103 parte, un serviciu global ruleaz\u0103 c\u00e2te un singur task pe un singur nod, f\u0103r\u0103 un num\u0103r specificat de sarcini. Cu fiecare nor ad\u0103ugat la platform\u0103, Docker creeaz\u0103 o nou\u0103 sarcin\u0103 asignat\u0103 acestuia. Spre exemplu, companiile care pot folosi serviciile globale sunt servicii de monitorizare, scannere sau altele similare.&nbsp;<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img src=\"https:\/\/fotc.com\/app\/uploads\/2023\/02\/replicated-vs-global.png\" alt=\"\" class=\"wp-image-102555\" width=\"675\" height=\"482\" srcset=\"https:\/\/fotc.com\/app\/uploads\/2023\/02\/replicated-vs-global.png 868w, https:\/\/fotc.com\/app\/uploads\/2023\/02\/replicated-vs-global-300x214.png 300w, https:\/\/fotc.com\/app\/uploads\/2023\/02\/replicated-vs-global-768x549.png 768w, https:\/\/fotc.com\/app\/uploads\/2023\/02\/replicated-vs-global-123x88.png 123w, https:\/\/fotc.com\/app\/uploads\/2023\/02\/replicated-vs-global-142x101.png 142w, https:\/\/fotc.com\/app\/uploads\/2023\/02\/replicated-vs-global-245x175.png 245w, https:\/\/fotc.com\/app\/uploads\/2023\/02\/replicated-vs-global-395x282.png 395w, https:\/\/fotc.com\/app\/uploads\/2023\/02\/replicated-vs-global-256x183.png 256w, https:\/\/fotc.com\/app\/uploads\/2023\/02\/replicated-vs-global-26x19.png 26w\" sizes=\"(max-width: 675px) 100vw, 675px\" \/><figcaption>Surs\u0103 foto: Doc.Docker.com<\/figcaption><\/figure><\/div>\n\n\n\n<h2>Cum func\u021bioneaz\u0103 Docker Swarm?<\/h2>\n\n\n\n<p>Docker Swarm este un sistem complet descentralizat, facilit\u00e2nd accesul pentru diferitele echipe care gestioneaz\u0103 mediul.&nbsp;<\/p>\n\n\n\n<p>Containerele sunt \u00eempinse \u0219i controlate prin servicii, care pot fi definite drept un grup de containere care con\u021bin aceea\u0219i imagine. Serviciile permit scalarea, iar pentru a le implementa, este nevoie de minimum un nod. \u00cen Docker Swarm, avem dou\u0103 tipuri de noduri: nod manager, care se ocup\u0103 de sarcinile de gestionare a clusterelor \u0219i nod lucr\u0103tor, care prime\u0219te \u0219i execut\u0103 aceste sarcini.<\/p>\n\n\n\n<p>Nodul manager recunoa\u0219te starea tuturor nodurilor de lucru cu care comunic\u0103 bilateral. Nodul lucr\u0103tor este intermediat de agent care raporteaz\u0103 managerului starea unei sarcini gestionate, acceptat\u0103 anterior de la acel nod.<\/p>\n\n\n\n<p>Accesul la serviciile Docker Swarm \u0219i implementarea acestora se pot face prin orice nod din acela\u0219i cluster. \u00cen acest caz, este necesar s\u0103 indica\u021bi ce imagine de container dori\u021bi s\u0103 utiliza\u021bi. Pute\u021bi alege din registrul public (Docker Hub) sau pute\u021bi face un registru privat.<\/p>\n\n\n\n<p>Aprofund\u00e2nd terminologia Docker, exist\u0103 o diferen\u021b\u0103 subtil\u0103 \u00eentre servicii \u0219i sarcini. Serviciul descrie \u00een acest caz un proiect, \u00een \u200b\u200btimp ce o sarcin\u0103 este modalitatea de a \u00eel executa. Utilizatorul creeaz\u0103 un serviciu care mai apoi ini\u021biaz\u0103 o sarcin\u0103, iar sarcina \u00een sine poate fi atribuit\u0103 unui singur nod.<\/p>\n\n\n\n<p>De asemenea, este posibil s\u0103 ave\u021bi mai mul\u021bi manageri \u00een Docker Swarm, dar \u00een acest caz, este necesar s\u0103 specifica\u021bi care dintre ele \u00eei suprascrie pe ceilal\u021bi.<\/p>\n\n\n\n<h2>Diferen\u021be \u00eentre Docker Swarm \u0219i Kubernetes<\/h2>\n\n\n\n<p>Kubernetes, cunoscut \u0219i sub numele de K8s, este o alt\u0103 platform\u0103 open-source pentru orchestrarea containerelor. Accept\u0103 automatizarea implement\u0103rii, scalarea aplica\u021biilor, gestionarea containerelor, monitorizarea schimb\u0103rilor \u0219i a proceselor. Permite gestionarea clusterelor (grupuri de ma\u0219ini cooperante) \u0219i a nodurilor (ma\u0219ini individuale dintr-un cluster) la scar\u0103, scurt\u00e2nd astfel procesul de adaptare a aplica\u021biilor la cerin\u021bele de infrastructur\u0103 \u0219i simplific\u00e2nd procesul de implementare a modific\u0103rilor \u0219i ad\u0103ugarea de noi elemente la sistem.<\/p>\n\n\n\n<p>Cite\u0219te \u0219i:<\/p>\n\n\n\n<ul><li><a href=\"https:\/\/fotc.com\/ro\/blog\/kubernetes-docker-swarm\/\" class=\"ek-link\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">Kubernetes vs Docker Swarm &#8211; compararea platformelor de orchestrare<\/mark><\/strong><\/a><\/li><li><a href=\"https:\/\/fotc.com\/ro\/blog\/cloud-run-implementare-aplicatiilor-cloud-google\/\" class=\"ek-link\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-red-color\">Google Cloud Run &#8211; implementare instantanee a aplica\u021biilor \u00een cloudul Google<\/mark><\/strong><\/a><\/li><\/ul>\n\n\n\n<p>Google a dezvoltat platforma Kubernetes \u00een urm\u0103 cu 20 de ani pentru a sprijini sarcinile de produc\u021bie ale companiei \u0219i pentru a rula miliarde de containere pe s\u0103pt\u0103m\u00e2n\u0103. \u00cen 2014, proiectul a fost predat Cloud Native Computing Foundation, care intr\u0103 \u00een subordinea Linux Foundation, iar licen\u021ba software a fost schimbat\u0103 \u00een Apache 2.0. De atunci, platforma a fost sus\u021binut\u0103 de CNCF \u0219i dezvoltat\u0103 continuu.<\/p>\n\n\n<div class=\"bg-yellow banners mt-4 mb-4\">\r\n  <div class=\"container \">\r\n    <div class=\"row sw\">\r\n        <div class=\"col-md-7 sw col-12 mb-md-0\">\r\n        <span style=\"margin-bottom: 1rem;\r\n    font-weight: 500;margin-top: 25px;\r\n    line-height: 1.1;\r\n    font-size: 2rem; display: block; color:#fff\">Testa\u021bi gratuit Google Kubernetes Engine<\/span>\r\n        <\/div>\r\n        <div class=\"col-md-5 sw sww\">\r\n        <img style=\"margin-top:25px;\" src=\"\/app\/uploads\/2023\/02\/FOTC-LOGO-WWW-RGB-RED-2.png\">\r\n        <\/div>\r\n        <\/div>\r\n        <div class=\"row\">\r\n          <div class=\"col-md-7\"><p style=\"color:#fff\">Beneficia\u021bi de suport tehnic \u0219i de un voucher de 500 USD<\/p><\/div>\r\n        <div class=\"col-md-5 col-12 text-cent-right\">\r\n        <a class=\"newbtn bannerbtn\" href=\"https:\/\/fotc.com\/ro\/contact\/\">Contacta\u021bi-ne!<\/a>\r\n        \r\n        <\/div>\r\n    <\/div>\r\n  <\/div>\r\n<\/div>\n\n\n<h2>Cum s\u0103 v\u0103 crea\u021bi propriul Swarm? <\/h2>\n\n\n\n<p>Alegerea platformei de orchestrare depinde de natura organiza\u021biei dvs \u0219i de aplica\u021bia dezvoltat\u0103 de aceasta.<\/p>\n\n\n\n<p>Dac\u0103 principalul interes este viteza de implementare (mai ales dac\u0103 produsul nu este foarte extins \u0219i solicitant), Docker Swarm poate fi o solu\u021bie pentru voi. Printre avantajele sale incontestabile se num\u0103r\u0103 instalarea u\u0219oar\u0103, viteza de \u00eenv\u0103\u021bare \u0219i compatibilitatea cu mediul Docker.<\/p>\n\n\n\n<p>Cu toate acestea, dac\u0103 stabilitatea \u0219i predictibilitatea dezvolt\u0103rii sunt esen\u021biale, ar trebui s\u0103 alege\u021bi platforma Kubernetes \u2013 mai ales pentru un sistem extins format din mii sau milioane de containere. Timpul necesar pentru a v\u0103 familiariza cu capacit\u0103\u021bile platformei este mai lung, dar v\u0103 va permite s\u0103 utiliza\u021bi multe instrumente \u0219i s\u0103 adapta\u021bi platforma la nevoile dumneavoastr\u0103 individuale.<\/p>\n\n\n\n<p>Descoperi\u021bi \u0219i testa\u021bi gratuit Kubernetes cu voucherul <a href=\"https:\/\/fotc.com\/ro\/google-cloud-platform\/\" class=\"ek-link\">Google Cloud Platform<\/a> de 500$ oferit de FOTC. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>V-a\u021bi g\u0103sit vreodat\u0103 \u00een postura \u00een care, dezvolt\u00e2nd o aplica\u021bie, a\u021bi avut de rezolvat numeroase erori doar dup\u0103 implementarea pe server a acesteia? A\u021bi fost vreodat\u0103 obliga\u021bi s\u0103 opri\u021bi furnizarea unui serviciul \u00een timpul implement\u0103rii unui patch? Una dintre solu\u021biile pe care pute\u021bi merge \u00een astfel de cazuri sunt, al\u0103turi de ma\u0219ini virtuale, containerele \u0219i&#8230;<\/p>\n","protected":false},"author":19,"featured_media":100939,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_editorskit_title_hidden":false,"_editorskit_reading_time":3,"_editorskit_typography_data":[],"_editorskit_blocks_typography":"","_editorskit_is_block_options_detached":false,"_editorskit_block_options_position":"{}"},"categories":[562],"tags":[1009],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v16.7 (Yoast SEO v19.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Docker Swarm - pentru ce este folosit? | FOTC<\/title>\n<meta name=\"description\" content=\"Descoperi\u021bi Docker Swarm, o platform\u0103 open source pentru orchestrarea containerelor. 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