{"id":1148,"date":"2019-02-04T10:37:54","date_gmt":"2019-02-04T13:37:54","guid":{"rendered":"https:\/\/blog.absam.io\/?p=1148"},"modified":"2019-02-04T10:37:54","modified_gmt":"2019-02-04T13:37:54","slug":"cluster-mariadb-galera-no-debian-ubuntu","status":"publish","type":"post","link":"https:\/\/absam.io\/blog\/cluster-mariadb-galera-no-debian-ubuntu\/","title":{"rendered":"Cluster MariaDB Galera no Debian ou Ubuntu"},"content":{"rendered":"<p><strong>Introdu\u00e7\u00e3o<\/strong><br \/>\nNeste tutorial vamos aprender a criar um cluster de banco de dados <strong>MariaDB 10.1<\/strong> usando o Galera Cluster nativo do MariaDB no Linux Debian 9 ou qualquer outra vers\u00e3o Debian\/Ubuntu desde que seja instalado o MariaDB 10.1. Rodar o banco de dados em cluster \u00e9 importante pois tr\u00e1s integridade nos dados e redund\u00e2ncia, aumentando a disponibilidade do servi\u00e7o.<\/p>\n<p>Para isso, ser\u00e1 necess\u00e1rio o m\u00ednimo de <strong>3 servidores <\/strong>linux.<\/p>\n<p><span style=\"color: #808080;\">Se estiver logado como root, voc\u00ea pode remover o sudo dos comandos abaixo.<\/span><\/p>\n<p><strong>Primeiro vamos atualizar o reposit\u00f3rio (Execute nos 3 servidores)<\/strong><\/p>\n<pre>$ sudo apt update<\/pre>\n<p><span style=\"color: #ff0000;\">Obs: \u00c9 necess\u00e1rio que cada servidor esteja com hostname diferente um do outro.<br \/>\n<span style=\"color: #000000;\">Se precisa alterar o hostname e n\u00e3o sabe como fazer isso, pode seguir este tutorial:\u00a0<a href=\"https:\/\/blog.absam.io\/como-alterar-o-hostname-no-debian\/\">https:\/\/blog.absam.io\/como-alterar-o-hostname-no-debian\/<\/a><\/span><\/span><\/p>\n<p><strong>Agora vamos instalar os pacotes necess\u00e1rios (Execute nos 3 servidores)<br \/>\n<\/strong>Neste passo, vamos instalar o MariaDB nos 3 servidores junto com o client e o rsync que faz a sincroniza\u00e7\u00e3o dos dados entre os nodes.<\/p>\n<pre>$ sudo apt install mariadb-server mariadb-client rsync -y<\/pre>\n<p><strong>Desligando o MariaDB\u00a0(Execute nos 3 servidores)<br \/>\n<\/strong>Conclu\u00eddos os passos anteriores, vamos desligar o MariaDB nos 3 nodes.<\/p>\n<pre>$ sudo service mysql stop<\/pre>\n<p><strong>Configurando o Galera<br \/>\n<\/strong>Agora sim vamos partir para a configura\u00e7\u00e3o do galera e integra\u00e7\u00e3o\/replica\u00e7\u00e3o dos dados entre os 3 nodes MariaDB.<\/p>\n<p>Vamos criar um arquivo nesse diret\u00f3rio:\u00a0<strong><span style=\"color: #808080;\">\/etc\/mysql\/conf.d\/galera.cnf<\/span><\/strong><\/p>\n<p>Com o seguinte conte\u00fado (Execute nos 3 servidores):<\/p>\n<pre class=\"chroma\"><code class=\"language-ini\" data-lang=\"ini\"><span class=\"k\">[mysqld]<\/span>\n<span class=\"c1\">#mysql settings<\/span>\n<span class=\"na\">binlog_format<\/span><span class=\"o\">=<\/span><span class=\"s\">ROW<\/span>\n<span class=\"na\">default-storage-engine<\/span><span class=\"o\">=<\/span><span class=\"s\">innodb<\/span>\n<span class=\"na\">innodb_autoinc_lock_mode<\/span><span class=\"o\">=<\/span><span class=\"s\">2<\/span>\n<span class=\"na\">query_cache_size<\/span><span class=\"o\">=<\/span><span class=\"s\">0<\/span>\n<span class=\"na\">query_cache_type<\/span><span class=\"o\">=<\/span><span class=\"s\">0<\/span>\n<span class=\"na\">bind-address<\/span><span class=\"o\">=<\/span><span class=\"s\">0.0.0.0<\/span>\n\n<span class=\"c1\">#galera settings<\/span>\n<span class=\"na\">wsrep_on<\/span><span class=\"o\">=<\/span><span class=\"s\">ON<\/span>\n<span class=\"na\">wsrep_provider<\/span><span class=\"o\">=<\/span><span class=\"s\">\/usr\/lib\/galera\/libgalera_smm.so<\/span>\n<span class=\"na\">wsrep_cluster_name<\/span><span class=\"o\">=<\/span><span class=\"s\">\"my_wsrep_cluster\"<\/span>\n<span class=\"na\">wsrep_cluster_address<\/span><span class=\"o\">=<\/span><span class=\"s\">\"gcomm:\/\/<span style=\"color: #ff0000;\">IP_01,IP_02,IP_03<\/span>\"<\/span>\n<span class=\"na\">wsrep_node_address<\/span><span class=\"o\">=<\/span><span class=\"s\">\"<span style=\"color: #ff0000;\">IP_01<\/span>\"<\/span>\n<span class=\"na\">wsrep_node_name<\/span><span class=\"o\">=<\/span><span class=\"s\">\"<span style=\"color: #ff0000;\">HOSTNAME_01<\/span>\"<\/span>\n<span class=\"na\">wsrep_sst_method<\/span><span class=\"o\">=<\/span><span class=\"s\">rsync<\/span><\/code><\/pre>\n<p>Troque os ips pelo IP de cada servidor e o nome pelo nome do servidor em quest\u00e3o.<br \/>\nVai ficar <span style=\"color: #333333;\"><strong>mais ou menos<\/strong><\/span> assim:<\/p>\n<pre><code class=\"language-ini\" data-lang=\"ini\"><span class=\"na\"><span style=\"color: #808080;\"><strong># Servidor 01<\/strong><\/span>\nwsrep_cluster_address<\/span><span class=\"o\">=<\/span><span class=\"s\">\"gcomm:\/\/<span style=\"color: #ff0000;\">10.0.0.15,10.0.0.30,10.0.0.45<\/span>\"<\/span>\n<span class=\"na\">wsrep_node_address<\/span><span class=\"o\">=<\/span><span class=\"s\">\"<span style=\"color: #ff0000;\">10.0.0.15<\/span>\"<\/span>\n<span class=\"na\">wsrep_node_name<\/span><span class=\"o\">=<\/span><span class=\"s\">\"<span style=\"color: #ff0000;\">mariadb01.cloud.server<\/span>\"<\/span><\/code><\/pre>\n<pre><code class=\"language-ini\" data-lang=\"ini\"><span class=\"na\"><span style=\"color: #808080;\"><strong># Servidor 02<\/strong><\/span>\nwsrep_cluster_address<\/span><span class=\"o\">=<\/span><span class=\"s\">\"gcomm:\/\/<span style=\"color: #ff0000;\">10.0.0.15,10.0.0.30,10.0.0.45<\/span>\"<\/span>\n<span class=\"na\">wsrep_node_address<\/span><span class=\"o\">=<\/span><span class=\"s\">\"<span style=\"color: #ff0000;\">10.0.0.30<\/span>\"<\/span>\n<span class=\"na\">wsrep_node_name<\/span><span class=\"o\">=<\/span><span class=\"s\">\"<span style=\"color: #ff0000;\">mariadb02.cloud.server<\/span>\"<\/span><\/code><\/pre>\n<pre><code class=\"language-ini\" data-lang=\"ini\"><span class=\"na\"><span style=\"color: #808080;\"><strong># Servidor 03<\/strong><\/span>\nwsrep_cluster_address<\/span><span class=\"o\">=<\/span><span class=\"s\">\"gcomm:\/\/<span style=\"color: #ff0000;\">10.0.0.15,10.0.0.30,10.0.0.45<\/span>\"<\/span>\n<span class=\"na\">wsrep_node_address<\/span><span class=\"o\">=<\/span><span class=\"s\">\"<span style=\"color: #ff0000;\">10.0.0.45<\/span>\"<\/span>\n<span class=\"na\">wsrep_node_name<\/span><span class=\"o\">=<\/span><span class=\"s\">\"<span style=\"color: #ff0000;\">mariadb03.cloud.server<\/span>\"<\/span><\/code><\/pre>\n<p><strong>Liberando acesso externo no MariaDB (Execute nos 3 servidores)<\/strong><br \/>\n<span style=\"color: #808080;\">Se o cluster precisa estar acess\u00edvel por outros computadores e servidores, ent\u00e3o voc\u00ea vai precisar executar o passo abaixo.<\/span><\/p>\n<pre><span style=\"color: #808080;\"><span style=\"background-color: #e9ebec;\"><span style=\"color: #333333;\">$ sudo nano \/etc\/mysql\/mariadb.conf.d\/50-server.cnf\n<\/span><b>\n<\/b># Procure a linha <strong>bind-address 127.0.0.1<\/strong>\n# Troque para <strong>bind-address 0.0.0.0<\/strong>\n# Salve e feche o arquivo<\/span><\/span><\/pre>\n<p><strong>Agora vamos inicializar o servidor com cluster ativado.<\/strong><br \/>\n<span style=\"color: #808080;\">Obs: As portas TCP 3306, 4567, 4568, 4444 e a porta UDP 4567 precisam estar liberadas.<\/span><\/p>\n<pre><code class=\"language-ini\" data-lang=\"ini\"><span class=\"na\"><span style=\"color: #808080;\"><strong># Servidor 01<\/strong><\/span>\n<span style=\"color: #333333;\">$\u00a0sudo galera_new_cluster<\/span><\/span><\/code><\/pre>\n<pre><code class=\"language-ini\" data-lang=\"ini\"><span class=\"na\"><span style=\"color: #808080;\"><strong># Servidor 02<\/strong><\/span>\n<span style=\"color: #333333;\">$\u00a0sudo\u00a0service\u00a0mysql\u00a0start<\/span><\/span><\/code><\/pre>\n<pre><code class=\"language-ini\" data-lang=\"ini\"><span class=\"na\"><span style=\"color: #808080;\"><strong># Servidor 03<\/strong><\/span>\n<span style=\"color: #333333;\">$\u00a0sudo\u00a0service\u00a0mysql\u00a0start<\/span><\/span><\/code><\/pre>\n<p>Executados os passos acima, o cluster j\u00e1 deve estar devidamente sincronizado.<br \/>\nVoc\u00ea pode checar quantos nodes tem no cluster, executando este comando:<\/p>\n<pre><code class=\"language-ini\" data-lang=\"ini\"><span class=\"na\"><span style=\"color: #333333;\">$ mysql -u root -p -e \"SHOW STATUS LIKE 'wsrep_cluster_size'\"\n<\/span><\/span><\/code><\/pre>\n<p>O retorno deve ser algo assim:<\/p>\n<pre class=\"code-pre \"><code>+--------------------+-------+\n| Variable_name      | Value |\n+--------------------+-------+\n| wsrep_cluster_size | <span style=\"color: #ff0000;\"><strong>3<\/strong><\/span>     |\n+--------------------+-------+<\/code><\/pre>\n<p>O resultado da vari\u00e1vel\u00a0<span style=\"color: #808080;\"><strong>wsrep_cluster_size<\/strong><\/span> deve ser <span style=\"color: #808080;\"><strong>igual ao n\u00famero de nodes<\/strong><\/span> que voc\u00ea est\u00e1 usando, em nosso caso 3.<\/p>\n<p>Se voc\u00ea quer criar um novo <strong>usu\u00e1rio<\/strong>\u00a0com acesso externo no MariaDB, pode seguir esse tutorial:\u00a0<a href=\"https:\/\/blog.absam.io\/criando-usuario-no-mysql-ou-mariadb-via-shell\/\">https:\/\/blog.absam.io\/criando-usuario-no-mysql-ou-mariadb-via-shell\/<\/a><\/p>\n<p>Se voc\u00ea precisa instalar o\u00a0<strong>phpMyAdmin<\/strong> pode seguir este tutorial:\u00a0<a href=\"https:\/\/blog.absam.io\/instalando-phpmyadmin-no-ubuntu-18-04-ou-debian-9\/\">https:\/\/blog.absam.io\/instalando-phpmyadmin-no-ubuntu-18-04-ou-debian-9\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introdu\u00e7\u00e3o Neste tutorial vamos aprender a criar um cluster de banco de dados MariaDB 10.1 usando o Galera Cluster nativo do MariaDB no Linux Debian 9 ou qualquer outra vers\u00e3o Debian\/Ubuntu desde que seja instalado o MariaDB 10.1. Rodar o [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":14193,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[],"class_list":["post-1148","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>Cluster MariaDB Galera no Debian ou Ubuntu - 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\/cluster-mariadb-galera-no-debian-ubuntu\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cluster MariaDB Galera no Debian ou Ubuntu\" \/>\n<meta property=\"og:description\" content=\"Introdu\u00e7\u00e3o Neste tutorial vamos aprender a criar um cluster de banco de dados MariaDB 10.1 usando o Galera Cluster nativo do MariaDB no Linux Debian 9 ou qualquer outra vers\u00e3o Debian\/Ubuntu desde que seja instalado o MariaDB 10.1. 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