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Cluster K8S com NFS

Este projeto tem como objetivo criar um cluster k8s com NFS(Network File System) para estudos utilizando o vagrant.

Serão criadas 4 máquinas sendo elas:

  • master - Máquina master do cluster k8s.
  • minion1 - Nó 1 do cluster k8s.
  • minion2 - Nó 2 do cluster k8s.
  • storage - Servidor NFS (Network File System)

Pré-Requisitos:

Vagrant (https://www.vagrantup.com/docs/installation)

VirtualBox(https://www.virtualbox.org/wiki/Downloads)

Passo a Passo da instalação:

git clone https://github.com/leoberbert/cluster-dev-k8s.git

cd cluster-dev-k8s

Agora basta executar o comando abaixo e aguardar todo o ambiente ser criado.

vagrant up

Após o término iremos verificar se nosso ambiente encontra-se criado e pronto para utilização.

Mapa de IP/Host:

172.27.11.10 - master
172.27.11.20 - minion1
172.27.11.30 - minion2
172.27.11.40 - storage

Acessem a máquina master para verificarmos se o cluster encontra-se funcionando:

vagrant@master:~/vagrant$ kubectl get nodes
NAME      STATUS   ROLES    AGE    VERSION
master    Ready    master   5d1h   v1.18.3
minion1   Ready    <none>   5d1h   v1.18.3
minion2   Ready    <none>   5d1h   v1.18.3

Nas máquinas minion1 e minion2 precisaremos montar o disco para trabalhar com o NFS e gravar os arquivos na máquina storage:

vagrant@minion1:~$ sudo mount -t nfs 172.27.11.40:/volumes/v1 /mnt
vagrant@minion2:~$ sudo mount -t nfs 172.27.11.40:/volumes/v1 /mnt 

Iremos criar um arquivo nas máquinas minion1 e minion2 e verificar se o arquivo será armazenado na maquina storage:

vagrant@minion1:/mnt$ cd /mnt/; sudo touch minion1; ls -lrt
total 0
-rw-r--r-- 1 root root 0 Jun 12 19:51 minion1

vagrant@minion2:~$ cd /mnt/; sudo touch minion2; ls -lrt
total 0
-rw-r--r-- 1 root root 0 Jun 12 19:51 minion1
-rw-r--r-- 1 root root 0 Jun 12 19:52 minion2

Note que quando executei o comando na maquina minion2, já foi exibido o arquivo criado na máquina minion1. Na máquina storage acessaremos o diretório montado anteriormente.

vagrant@storage:~$ cd /volumes/v1
vagrant@storage:/volumes/v1$ ls -lrtF
total 0
-rw-r--r-- 1 root root 0 Jun 12 19:51 minion1
-rw-r--r-- 1 root root 0 Jun 12 19:52 minion2
vagrant@storage:/volumes/v1$ 

Com este cluster montado, será possivel realizarem seus estudos no k8s e também realizar o desenvolvimento de aplicações.

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