{"id":1763,"date":"2025-03-12T17:33:47","date_gmt":"2023-02-19T07:25:36","guid":{"rendered":""},"modified":"2025-02-02T00:46:17","modified_gmt":"2025-02-01T23:46:17","slug":"como-configurar-um-cluster-kubernetes-com-kubeadm-no-ubuntu-22-04","status":"publish","type":"post","link":"https:\/\/netcloud24.com\/knowledgebase\/como-configurar-um-cluster-kubernetes-com-kubeadm-no-ubuntu-22-04\/","title":{"rendered":"Como Configurar um Cluster Kubernetes com Kubeadm no Ubuntu 22.04"},"content":{"rendered":"<p>\u00a0<\/p>\n<\/p>\n<h1>\u00a0<\/h1>\n<p>O Kubernetes \u00e9 uma plataforma de orquestra\u00e7\u00e3o de cont\u00eaineres de c\u00f3digo aberto, e o <strong>Kubeadm<\/strong> \u00e9 uma ferramenta que facilita a cria\u00e7\u00e3o de um cluster Kubernetes. Neste tutorial, voc\u00ea aprender\u00e1 a configurar um cluster Kubernetes no Ubuntu 22.04 utilizando o Kubeadm.<\/p>\n<h2>Requisitos<\/h2>\n<ul>\n<li>Ubuntu 22.04 em todos os n\u00f3s (m\u00e1quinas)<\/li>\n<li>Usu\u00e1rio com privil\u00e9gios sudo em todas as m\u00e1quinas<\/li>\n<li>Conectividade de rede entre todos os n\u00f3s<\/li>\n<li>Ao menos 2 GB de RAM em cada n\u00f3<\/li>\n<li><a href=\"https:\/\/netcloud24.com?language=portuguese-pt&amp;currency=4\" target=\"_blank\" rel=\"follow\">Servidor VPS<\/a><\/li>\n<\/ul>\n<h2>Passo 1: Atualizar o sistema<\/h2>\n<p>Antes de come\u00e7ar, certifique-se de que seu sistema est\u00e1 atualizado em todos os n\u00f3s do cluster:<\/p>\n<pre><code>sudo apt update &amp;&amp; sudo apt upgrade -y<\/code><\/pre>\n<h2>Passo 2: Desativar o Swap<\/h2>\n<p>O Kubernetes exige que o <code>swap<\/code> esteja desativado. Para desativ\u00e1-lo temporariamente, execute:<\/p>\n<pre><code>sudo swapoff -a<\/code><\/pre>\n<p>Para desativ\u00e1-lo permanentemente, edite o arquivo <code>\/etc\/fstab<\/code> e comente a linha que menciona o <code>swap<\/code>:<\/p>\n<pre><code>sudo nano \/etc\/fstab<\/code><\/pre>\n<h2>Passo 3: Instalar o Docker<\/h2>\n<p>O Kubernetes utiliza o Docker como seu runtime padr\u00e3o de cont\u00eainer. Instale o Docker em todos os n\u00f3s:<\/p>\n<pre><code>sudo apt install docker.io -y<\/code><\/pre>\n<p>Inicie e habilite o Docker para iniciar no boot:<\/p>\n<pre><code>sudo systemctl enable --now docker<\/code><\/pre>\n<h2>Passo 4: Instalar o Kubeadm, Kubelet e Kubectl<\/h2>\n<p>Adicione a chave GPG do reposit\u00f3rio do Kubernetes:<\/p>\n<pre><code>curl -s https:\/\/packages.cloud.google.com\/apt\/doc\/apt-key.gpg | sudo apt-key add -<\/code><\/pre>\n<p>Adicione o reposit\u00f3rio Kubernetes:<\/p>\n<pre><code>sudo apt-add-repository \"deb http:\/\/apt.kubernetes.io\/ kubernetes-xenial main\"<\/code><\/pre>\n<p>Instale o <strong>Kubeadm<\/strong>, <strong>Kubelet<\/strong> e <strong>Kubectl<\/strong> em todos os n\u00f3s:<\/p>\n<pre><code>sudo apt install kubeadm kubelet kubectl -y<\/code><\/pre>\n<p>Marque os pacotes para que n\u00e3o sejam atualizados automaticamente:<\/p>\n<pre><code>sudo apt-mark hold kubeadm kubelet kubectl<\/code><\/pre>\n<h2>Passo 5: Inicializar o N\u00f3 Mestre<\/h2>\n<p>No n\u00f3 mestre, inicialize o cluster Kubernetes usando o <strong>Kubeadm<\/strong>:<\/p>\n<pre><code>sudo kubeadm init --pod-network-cidr=192.168.0.0\/16<\/code><\/pre>\n<p>Ap\u00f3s a execu\u00e7\u00e3o bem-sucedida, voc\u00ea ver\u00e1 instru\u00e7\u00f5es para configurar o <code>kubectl<\/code> para o usu\u00e1rio atual:<\/p>\n<pre><code>\r\nmkdir -p $HOME\/.kube\r\nsudo cp -i \/etc\/kubernetes\/admin.conf $HOME\/.kube\/config\r\nsudo chown $(id -u):$(id -g) $HOME\/.kube\/config\r\n    <\/code><\/pre>\n<h2>Passo 6: Instalar a Rede de Pod<\/h2>\n<p>O Kubernetes exige uma rede de Pod para permitir que os cont\u00eaineres se comuniquem entre si. Instale o plugin de rede <strong>Calico<\/strong>:<\/p>\n<pre><code>kubectl apply -f https:\/\/docs.projectcalico.org\/manifests\/calico.yaml<\/code><\/pre>\n<h2>Passo 7: Adicionar N\u00f3s de Trabalhadores ao Cluster<\/h2>\n<p>No n\u00f3 mestre, voc\u00ea ver\u00e1 um comando <strong>kubeadm join<\/strong> que deve ser executado nos n\u00f3s de trabalhadores. O comando ter\u00e1 um aspecto semelhante a este:<\/p>\n<pre><code>kubeadm join :6443 --token  --discovery-token-ca-cert-hash sha256:<\/code><\/pre>\n<p>Execute esse comando em cada n\u00f3 de trabalhador para unir-se ao cluster.<\/p>\n<h2>Passo 8: Verificar o Cluster<\/h2>\n<p>No n\u00f3 mestre, verifique se os n\u00f3s de trabalhadores foram adicionados com sucesso:<\/p>\n<pre><code>kubectl get nodes<\/code><\/pre>\n<p>Voc\u00ea dever\u00e1 ver uma lista de todos os n\u00f3s do cluster com o status <code>Ready<\/code>.<\/p>\n<h2>Conclus\u00e3o<\/h2>\n<p>Voc\u00ea configurou com sucesso um cluster Kubernetes no Ubuntu 22.04 usando o Kubeadm. Agora, voc\u00ea pode come\u00e7ar a implantar seus aplicativos em cont\u00eaineres.<\/p>\n<p>Para garantir que seu cluster tenha alta disponibilidade e escalabilidade, recomenda-se usar um <a href=\"https:\/\/netcloud24.com?language=portuguese-pt&amp;currency=4\" target=\"_blank\" rel=\"follow\">servidor VPS<\/a>, o que proporciona maior controle e flexibilidade.<\/p>\n<p><a href=\"https:\/\/de.netcloud24.com\/\" target=\"_blank\">Windows VPS Deutschland<\/a><\/p>\n<p><a href=\"https:\/\/es.netcloud24.com\/\" target=\"_blank\">Windows VPS Espa\u00f1a<\/a><\/p>\n<p><a href=\"https:\/\/nl.netcloud24.com\/\" target=\"_blank\">Windows VPS Nederland<\/a><\/p>\n<p><a href=\"https:\/\/it.netcloud24.com\/\" target=\"_blank\">Windows VPS Italia<\/a><\/p>\n<p><a href=\"https:\/\/pt.netcloud24.com\/\" target=\"_blank\">Windows VPS Portugal<\/a><\/p>\n<p><a href=\"https:\/\/it.netcloud24.com\/\" target=\"_blank\">VPS Windows Italia<\/a><\/p>\n<p><a href=\"https:\/\/ie.netcloud24.com\" target=\"_blank\">Windows VPS<\/a><\/p>\n<p><a href=\"https:\/\/ie.netcloud24.com\" target=\"_blank\">Windows VPS<\/a><\/p>\n<p><a href=\"https:\/\/ie.netcloud24.com\" target=\"_blank\">Windows VPS Sverige<\/a><\/p>\n<p><a href=\"https:\/\/ie.netcloud24.com\" target=\"_blank\">Windows VPS Norge<\/a><\/p>\n<p><a href=\"https:\/\/ie.netcloud24.com\" target=\"_blank\">Windows VPS<\/a><\/p>\n<p><a href=\"https:\/\/ie.netcloud24.com\" target=\"_blank\">Windows VPS T\u00fcrkiye<\/a><\/p>\n<p><a href=\"https:\/\/ie.netcloud24.com\" target=\"_blank\">Windows RDS (Remote Desktop Services)<\/a><\/p>\n<p><a href=\"https:\/\/ie.netcloud24.com\" target=\"_blank\">Windows VPS<\/a><\/p>\n<div class=\"post-author-box\" style=\"border-top:1px solid #ddd;margin-top:20px;padding-top:15px;\">\n<p><strong>Author:<\/strong> \u0141ukasz Bodziony<\/p>\n<p><strong>Website:<\/strong> <a href=\"https:\/\/ca.netcloud24.com\" target=\"_blank\" rel=\"dofollow\">Windows VPS<\/a><\/p>\n<p><em>\u0141ukasz Bodziony is the CEO and founder of <a href=\"https:\/\/netcloud24.com\" target=\"_blank\" rel=\"dofollow\">NETCLOUD24<\/a>, a global VPS hosting brand proudly originating from Poland. With extensive experience in cloud computing, virtualization, and server management, he delivers high-performance <strong>Windows VPS<\/strong> and <strong>Remote Desktop Services (RDS)<\/strong> solutions to clients across Europe, North America, and beyond.<\/em><\/p>\n<p><em>His expertise covers a wide range of technologies, including <strong>Microsoft Azure<\/strong>, <strong>Proxmox VE<\/strong>, <strong>Amazon Web Services (AWS)<\/strong>, and numerous other virtualization and cloud platforms.<\/em><\/p>\n<p><em>Beyond running his hosting business, \u0141ukasz also provides <strong>professional paid server configuration and optimization services<\/strong> for companies and individuals. Outside of work, he is dedicated to caring for his children and building a secure future for them.<\/em><\/p>\n<p><em>If you are interested in working with him or need expert assistance with your hosting, cloud environment, or server setup, feel free to reach out via <a href=\"https:\/\/ca.netcloud24.com\" target=\"_blank\" rel=\"dofollow\">Windows VPS<\/a>.<\/em><\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0 \u00a0 O Kubernetes \u00e9 uma plataforma de orquestra\u00e7\u00e3o de cont\u00eaineres de c\u00f3digo aberto, e o Kubeadm \u00e9 uma ferramenta que facilita a cria\u00e7\u00e3o de um cluster Kubernetes.\u2026<\/p>\n","protected":false},"author":1,"featured_media":3421,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[],"tags":[14,12,11,23,20,21,22,17,7,8,6,10,18,19,15,24,16,5,13,9],"class_list":["post-1763","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-cheapvps","tag-cloudvps","tag-hostingvps","tag-rds","tag-rdscal","tag-remotedesktop","tag-remotedesktopvps","tag-servervps","tag-ukvps","tag-virtualserver","tag-vpshosting","tag-vpsserver","tag-vpssolutions","tag-vpswindows","tag-vpswithwindows","tag-windowsrds","tag-windowsserver","tag-windowsvps","tag-windowsvpshosting","tag-windowsvpsuk"],"jetpack_publicize_connections":[],"_links":{"self":[{"href":"https:\/\/netcloud24.com\/knowledgebase\/wp-json\/wp\/v2\/posts\/1763","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/netcloud24.com\/knowledgebase\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/netcloud24.com\/knowledgebase\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/netcloud24.com\/knowledgebase\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/netcloud24.com\/knowledgebase\/wp-json\/wp\/v2\/comments?post=1763"}],"version-history":[{"count":0,"href":"https:\/\/netcloud24.com\/knowledgebase\/wp-json\/wp\/v2\/posts\/1763\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/netcloud24.com\/knowledgebase\/wp-json\/wp\/v2\/media\/3421"}],"wp:attachment":[{"href":"https:\/\/netcloud24.com\/knowledgebase\/wp-json\/wp\/v2\/media?parent=1763"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/netcloud24.com\/knowledgebase\/wp-json\/wp\/v2\/categories?post=1763"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/netcloud24.com\/knowledgebase\/wp-json\/wp\/v2\/tags?post=1763"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}