{"id":740,"date":"2016-10-19T15:27:14","date_gmt":"2016-10-19T15:27:14","guid":{"rendered":"https:\/\/blog.absam.io\/?p=740"},"modified":"2016-10-19T15:27:14","modified_gmt":"2016-10-19T15:27:14","slug":"criando-raid-a-partir-do-compartilhamento-de-rede","status":"publish","type":"post","link":"https:\/\/absam.io\/blog\/criando-raid-a-partir-do-compartilhamento-de-rede\/","title":{"rendered":"Criando RAID a partir do compartilhamento de rede"},"content":{"rendered":"<p style=\"text-align: left;\">Hoje vamos explicar como usar compartilhamentos <strong>SMB<\/strong> remotos, a fim de construir um dispositivo <strong>RAID<\/strong>. A ideia \u00e9 simples, usamos todos os recursos de armazenamento em nossa LAN, para construir um compartilhamento central <strong>NFS<\/strong>\/<strong>SMB<\/strong> ( pode ser usado para nuvens privadas como CloudStack ). Testamos com o Debian 6 x86_64, mas voc\u00ea vai encontrar todos os comandos semelhantes em todas as distribui\u00e7\u00f5es Linux.<\/p>\n<p>Lembrando que est\u00e1 configura\u00e7\u00e3o \u00e9 experimental e <strong>ainda<\/strong> n\u00e3o deve ser usada.<\/p>\n<p><strong>1. <\/strong>Criamos um arquivo em cada dispositivo, executamos em todos os nodes, altere <strong>[X]<\/strong>\u00a0 para o n\u00famero do node:<\/p>\n<blockquote><p><strong>$ dd if=\/dev\/zero of=\/myshare\/node[X].img bs=1M count=1024<\/strong><\/p><\/blockquote>\n<p><strong>2.\u00a0 <\/strong>Agora vamos trabalhar com o servidor central:<\/p>\n<ul>\n<li>Criamos o diret\u00f3rio para armazenar todas as montagens <strong>SMB<\/strong>:<\/li>\n<\/ul>\n<blockquote><p><strong>$ mkdir -p \/nodeshares\/node{1,2,3}<\/strong><\/p><\/blockquote>\n<ul>\n<li>Montamos cada dispositivo, observe que a senha \u00e9 definida pelo comando <strong>smbpasswd<\/strong>:<\/li>\n<\/ul>\n<blockquote><p><strong>$<\/strong> <strong>mount -t cifs -o username=myname,password=1 \/\/192.168.100.11\/myshare \/nodeshares\/node1<\/strong><\/p><\/blockquote>\n<blockquote><p><strong>$<\/strong> <strong>mount -t cifs -o username=myname,password=1 \/\/192.168.100.12\/myshare \/nodeshares\/node2<\/strong><\/p><\/blockquote>\n<blockquote><p><strong>$<\/strong> <strong>mount -t cifs -o username=myname,password=1 \/\/192.168.100.13\/myshare \/nodeshares\/node3<\/strong><\/p><\/blockquote>\n<p><strong>3. <\/strong>Agora vamos para parte divertida, criaremos um loop a partir dos arquivos que criamos na etapa 2, note que os arquivos realmente est\u00e3o em um host remoto:<\/p>\n<blockquote><p><strong>$ losetup -v \/dev\/loop1 \/nodeshares\/node1\/node1.img<br \/>\n$ losetup -v \/dev\/loop2 \/nodeshares\/node2\/node2.img<br \/>\n$ losetup -v \/dev\/loop3 \/nodeshares\/node3\/node3.img<\/strong><\/p><\/blockquote>\n<p><strong>4. <\/strong>Criamos o RAID de todos os dispositivos compartilhados:<\/p>\n<p>Criamos o dispositivo RAID n\u00edvel 5 utilizando os loops, lembrando \u00e9 a ordem dos dispositivos que importa:<\/p>\n<blockquote><p><strong>$ mdadm &#8211;create \/dev\/md0 &#8211;level=5 &#8211;raid-disks=3 \/dev\/loop1 \/dev\/loop2 \/dev\/loop3<\/strong><\/p><\/blockquote>\n<p>Vamos ver o processo de cria\u00e7\u00e3o a partir do mdstat:<\/p>\n<blockquote><p><strong>$ cat \/proc\/mdstat<\/strong><\/p><\/blockquote>\n<p><strong>5.\u00a0<\/strong>Criamos uma parti\u00e7\u00e3o em md1, montamos e exportamos a parti\u00e7\u00e3o em NFS ou SMB de volta para rede:<\/p>\n<ul>\n<li>Inicializa\u00e7\u00e3o:<\/li>\n<\/ul>\n<p>A fim de manter o RAID uma vez que iniciamos o servidor mestre, teremos que dizer ao kernel para procurar qualquer dispositivo MD e em seguida atualizar para mdadm. Vamos editar o arquivo \/etc\/mdadm\/mdadm.conf e adicionar os dispositivos de loop adicionando est\u00e1 linha:<\/p>\n<blockquote><p><strong>DEVICE \/dev\/loop*<\/strong><\/p><\/blockquote>\n<p>Em seguida, executamos este comando para adicionar o novo RAID:<\/p>\n<blockquote><p><strong>$ mdadm &#8211;detail &#8211;scan &gt;&gt; \/etc\/mdadm\/mdadm.conf<\/strong><\/p><\/blockquote>\n<ul>\n<li>O que acontece quando o node \u00e9 reiniciado ou desligado:<\/li>\n<\/ul>\n<p>O mdadm vai ver o dispositivo de loop como defeituoso e vai marcar como uma falha, podemos ver neste exemplo:<\/p>\n<blockquote><p><strong>$ cat \/proc\/mdstat <\/strong><br \/>\nPersonalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]<br \/>\nmd0 : active raid5 loop3[3](F) loop1[0] loop2[1]<br \/>\n1047552 blocks super 1.2 level 5, 512k chunk, algorithm 2 [3\/2] [UU_]<\/p><\/blockquote>\n<ul>\n<li>Dispositivos n\u00e3o utilizados:<\/li>\n<\/ul>\n<p>Para reparar precisamos remover o dispositivo com defeito:<\/p>\n<blockquote><p><strong>$ mdadm &#8211;manage \/dev\/md0 &#8211;remove \/dev\/loop3<\/strong><br \/>\nmdadm: hot removed \/dev\/loop3 from \/dev\/md1<\/p><\/blockquote>\n<p>Depois de remontar o node, podemos adicionar o dispositivo de volta para a matriz:<\/p>\n<blockquote><p><strong>$ mdadm &#8211;manage \/dev\/md0 &#8211;add \/dev\/loop3<br \/>\n<\/strong>mdadm: added \/dev\/loop3<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hoje vamos explicar como usar compartilhamentos SMB remotos, a fim de construir um dispositivo RAID. A ideia \u00e9 simples, usamos todos os recursos de armazenamento em nossa LAN, para construir um compartilhamento central NFS\/SMB ( pode ser usado para nuvens [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":776,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[],"class_list":["post-740","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutoriais"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Criando RAID a partir do compartilhamento de rede - Blog da Absam<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/absam.io\/blog\/criando-raid-a-partir-do-compartilhamento-de-rede\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Criando RAID a partir do compartilhamento de rede\" \/>\n<meta property=\"og:description\" content=\"Hoje vamos explicar como usar compartilhamentos SMB remotos, a fim de construir um dispositivo RAID. 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