add master config file

marcelorcastro · Dec 1, 2020 · a8d8162 · a8d8162
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diff --git a/cluster-config/config-master.sh b/cluster-config/config-master.sh
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+# atualiza o sistema 
+sudo apt update
+sudo apt upgrade -y
+
+# adiciona o repositorio do  Kubernetes para o Ubuntu 20.04
+sudo apt update
+sudo apt -y install curl apt-transport-https
+curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
+echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
+
+# instala kubelet, kubeadm e kubectl e outros pacotes
+sudo apt update
+sudo apt -y install vim git curl wget kubelet kubeadm kubectl
+sudo apt-mark hold kubelet kubeadm kubectl
+
+# confirma a instalacao, verificando a versao do kubectl e kubeadm
+kubectl version --client && kubeadm version
+
+# desabilita o swap
+sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
+sudo swapoff -a
+
+# configura sysctl
+sudo modprobe overlay
+sudo modprobe br_netfilter
+
+cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
+net.bridge.bridge-nf-call-ip6tables = 1
+net.bridge.bridge-nf-call-iptables = 1
+EOF
+
+sudo sysctl --system
+
+# instala o docker
+bash install-docker.sh
+
+# certifica que o modeulo br_netfilter esta carregado
+lsmod | grep br_netfilter
+
+# habilita o servico kubelet
+sudo systemctl start kubelet
+sudo systemctl enable kubelet
+
+# Pull container images
+sudo kubeadm config images pull
+
+# inicia o cluster kubernetes 
+# rede 10.244.0.0/16 padrao do flannel
+sudo kubeadm init --pod-network-cidr=10.244.0.0/16
+
+# configura o kubectl usando os comandos do outup
+mkdir -p $HOME/.kube
+sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
+sudo chown $(id -u):$(id -g) $HOME/.kube/config
+
+# verifica o status do cluster
+kubectl cluster-info
+
+# instala o plugin flannel para gerenciar a rede de overlay no Kubernetes
+kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
+
+# verifica os pods core do kubernets
+kubectl get pods --all-namespaces
+
+# verifica se o no master esta pronto
+kubectl get nodes -o wide
+
diff --git a/cluster-config/install-docker.sh b/cluster-config/install-docker.sh
@@ -0,0 +1,43 @@
+# atualiza a lista de repositorios
+sudo apt-get update
+
+# instala pacotes extras para o APT utilizar repositorios HTTPS
+sudo apt-get install -y apt-transport-https ca-certificates curl gnupg-agent gnupg2 software-properties-common
+
+#bBaixa e adiciona a chave publica do docker no sistema
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+sudo apt-key fingerprint 0EBFCD88
+
+# adiciona o repositorio que contem os pacotes para a instalacao do docker
+sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
+
+# instala os pacotes docker
+sudo apt update
+sudo apt-get install -y docker-ce docker-ce-cli containerd.io
+
+# adiciona o usuario ubuntu ao grupo docker
+sudo usermod -aG docker $USER
+
+# cria diretorios necessarios para configurar o docker com systemd
+sudo mkdir -p /etc/systemd/system/docker.service.d
+
+# cria arquivo de configuracao daemon.json
+cat <<EOF | sudo tee /etc/docker/daemon.json
+{
+  "exec-opts": ["native.cgroupdriver=systemd"],
+  "log-driver": "json-file",
+  "log-opts": {
+    "max-size": "100m"
+  },
+  "storage-driver": "overlay2"
+}
+EOF
+
+# inicia e habilita os servicos
+sudo systemctl daemon-reload 
+sudo systemctl restart docker
+sudo systemctl enable docker
+
+# Executa um teste de instalacao
+sudo docker run hello-world
+