WORKSHOP 2 - JHON SALDARRIAGA

.gitignore

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+# Created by https://www.toptal.com/developers/gitignore/api/vagrant
+# Edit at https://www.toptal.com/developers/gitignore?templates=vagrant
+
+### Vagrant ###
+# General
+.vagrant/
+
+# Log files (if you are creating logs in debug mode, uncomment this)
+# *.log
+
+### Vagrant Patch ###
+*.box
+
+# End of https://www.toptal.com/developers/gitignore/api/vagrant

README.md

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-# sd-workshop2 2022-1
-sd workshop2
+Para ejecutar el escenario del filesystem mediante un gluster (1 nodo master y 2 nodos):
+- Damos permisos de ejecución al script init_distributed_filesystem: chmod +x init_distributed_filesystem.sh 
+- Ejecutamos el script ./init_distributed_filesystem
+Si aparece un error similar a:
+"The IP address configured for the host-only network is not within the allowed ranges. 
+Please update the address used to be within the allowed ranges and run the command again."
+Crea un nuevo archivo en /etc/vbox/networks.conf con el siguiente contenido:
 
-- Completar la lógica de la applicación de pagos de tal manera que al hacer un pago através del microservicio de pagos, el monto de las facturas sea correctamente debitado, es decir, actualmente si una factura debe 1000 y yo hago un pago por 400 a esa factura, el microservicio invoice me sobreescribe el 1000 por 400 en vez de mostrarme el saldo restante 1000-400=600.
-- Completar la lógica de la aplicación de tal manera que haya 3 estados para las facturas. 0=debe 1=pagadoparcialmente 2=pagado
-- Hacer que las applicaciones se puedan registrar con consul
-- Debe ser un pull request a este repositorio sd-workshop2
+\* 10.0.0.0/8 192.168.0.0/16
+
+\* 2001::/64
+
+# Distributed File System (With Glusterfs)
+
+![alt text](https://docs.gluster.org/en/v3/images/640px-GlusterFS_Architecture.png "gluster")  
+> Gluster is a scalable, distributed file system that aggregates disk storage resources from multiple servers into a single global namespace.
+
+## Volumes  
+
+- Distributed Glusterfs Volume  
+![img](https://cloud.githubusercontent.com/assets/10970993/7412364/ac0a300c-ef5f-11e4-8599-e7d06de1165c.png)
+
+- Replicated Glusterfs Voume  
+![img2](https://cloud.githubusercontent.com/assets/10970993/7412379/d75272a6-ef5f-11e4-869a-c355e8505747.png)
+
+- Striped Glusterfs Volume  
+![img3](https://cloud.githubusercontent.com/assets/10970993/7412379/d75272a6-ef5f-11e4-869a-c355e8505747.png)
+
+### Glusterfs (Inicialización)
+
+Into master node
+```
+$ sudo gluster peer probe node-1
+$ sudo gluster peer probe node-2
+$ gluster pool list
+$ sudo gluster volume create gv0 replica 3 master:/gluster/data/gv0 node-1:/gluster/data/gv0 node-2:/gluster/data/gv0
+$ sudo gluster volume set gv0 auth.allow 127.0.0.1
+$ sudo gluster volume start gv0
+```
+
+Each node
+```
+$ sudo mount.glusterfs localhost:/gv0 /mnt
+```
+
+Para añadir un nuevo servidor
+
+| Command  | Description  |
+|---|---|
+| gluster peer status | Consulte el estado del cluster |
+| gluster peer probe node4 | Adicione el nuevo nodo |
+| gluster volume status | Anote el nombre del volumen |
+| gluster volume add-brick swarm-vols replica 5 node4:/gluster/data/swarm-vols | TODO: Verificar este comando |
+
+Para remover un nodo del cluster se requiere primero remover sus bricks de los volumenes asociados
+
+| Command  | Description  |
+|---|---|
+| gluster volume info | Consulte los identificadores de los bricks actuales |
+| gluster volume remove-brick swarm-vols replica 1 node1:/gluster/data force | Remueve un brick de un volumen con dos replicas |
+| gluster peer detach node1 | Remueve un nodo del cluster |
+
+Eliminar un volumen
+
+| Command  | Description  |
+|---|---|
+| gluster volume stop swarm-vols | Detenga el volumen |
+| gluster volume delete swarm-vols | Elimine el volumen |
+
+
+### References
+* https://docs.gluster.org/en/v3/Administrator%20Guide/Managing%20Volumes/
+* https://support.rackspace.com/how-to/recover-from-a-failed-server-in-a-glusterfs-array/
+* https://support.rackspace.com/how-to/add-and-remove-glusterfs-servers/
+* http://embaby.com/blog/using-glusterfs-docker-swarm-cluster/
+* https://docs.gluster.org/en/latest/Quick-Start-Guide/Quickstart/
+* http://ask.xmodulo.com/create-mount-xfs-file-system-linux.html
+* https://www.cyberciti.biz/faq/linux-how-to-delete-a-partition-with-fdisk-command/
+* https://support.rackspace.com/how-to/getting-started-with-glusterfs-considerations-and-installation/
+* https://everythingshouldbevirtual.com/virtualization/vagrant-adding-a-second-hard-drive/
+* https://www.jamescoyle.net/how-to/351-share-glusterfs-volume-to-a-single-ip-address
 
-Bonus:
-- Subir las imagenes de la app a Docker hub
-- Crear un script en bash que lance toda la aplicación.

Vagrantfile

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+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# All Vagrant configuration is done below. The "2" in Vagrant.configure
+# configures the configuration version (we support older styles for
+# backwards compatibility). Please don't change it unless you know what
+# you're doing.
+
+firstDisk = './firstDisk.vdi'
+secondDisk = './secondDisk.vdi'
+thirdDisk = './thirdDisk.vdi'
+fourthDisk = './fourthDisk.vdi'
+Vagrant.configure("2") do |config|
+
+  config.ssh.insert_key = false
+  config.vm.define "nodemaster" do |lb|
+    lb.vm.box = "centos/7"
+    lb.vm.hostname = "nodemaster"
+    lb.vm.network "private_network", ip: "192.168.69.10"
+    lb.vm.provider "virtualbox" do |vb|
+     vb.customize ["modifyvm", :id, "--memory", "512", "--cpus", "1", "--name", "nodemaster"]
+     unless File.exist?(firstDisk)
+      vb.customize ['createhd', '--filename', firstDisk, '--variant', 'Fixed', '--size', 5 * 1024]
+    end
+    vb.customize ['storageattach', :id,  '--storagectl', 'IDE', '--port', 1, '--device', 0, '--type', 'hdd', '--medium', firstDisk]
+    end 
+    lb.vm.provision "shell", path: "scripts/glusterfs.sh"
+    lb.vm.provision "shell", path: "scripts/configuration.sh"
+  end
+
+   config.vm.define "node1" do |node1|
+     node1.vm.box = "centos/7"
+     node1.vm.hostname = "node-1"
+     node1.vm.network "private_network", ip: "192.168.69.100"
+     node1.vm.provider "virtualbox" do |vb|
+      vb.customize ["modifyvm", :id, "--memory", "512", "--cpus", "1", "--name", "node-1"]
+     unless File.exist?(secondDisk)
+        vb.customize ['createhd', '--filename', secondDisk, '--variant', 'Fixed', '--size', 5 * 1024]
+      end
+     vb.customize ['storageattach', :id,  '--storagectl', 'IDE', '--port', 1, '--device', 0, '--type', 'hdd', '--medium', secondDisk]
+     end
+     node1.vm.provision "shell", path: "scripts/glusterfs.sh"
+     node1.vm.provision "shell", path: "scripts/configuration.sh"
+   end
+
+   config.vm.define "node2" do |node2|
+     node2.vm.box = "centos/7"
+     node2.vm.hostname = "node-2"
+     node2.vm.network "private_network", ip: "192.168.69.101"
+     node2.vm.provider "virtualbox" do |vb|
+      vb.customize ["modifyvm", :id, "--memory", "512", "--cpus", "1", "--name", "node-2"]
+     unless File.exist?(thirdDisk)
+        vb.customize ['createhd', '--filename', thirdDisk, '--variant', 'Fixed', '--size', 5 * 1024]
+      end
+     vb.customize ['storageattach', :id,  '--storagectl', 'IDE', '--port', 1, '--device', 0, '--type', 'hdd', '--medium', thirdDisk]
+     end
+     node2.vm.provision "shell", path: "scripts/glusterfs.sh"
+     node2.vm.provision "shell", path: "scripts/configuration.sh" 
+   end
+
+end
+

ansible.cfg

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+[defaults]
+inventory=./ansible_hosts
+remote_user=vagrant
+private_key_file=$HOME/.vagrant.d/insecure_private_key
+host_key_checking=False
+retry_files_enabled=False
+#interpreter_python=auto_silent

ansible_hosts

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+[nodes]
+node1 ansible_ssh_host=192.168.69.100
+node2 ansible_ssh_host=192.168.69.101
+
+[masters]
+master ansible_ssh_host=192.168.69.10

init_distributed_filesystem.sh

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+#!/bin/bash
+
+vagrant up
+ansible-playbook playbooks/nodemaster-conf.yml
+ansible-playbook playbooks/nodes-conf.yml

playbooks/nodemaster-conf.yml

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+---
+- hosts: master
+  become: true
+  tasks:
+    - name: Start gluster
+      systemd:
+        name: glusterd
+        state: started
+
+    - name: Peer every node
+      gluster_peer:
+        state: present
+        nodes:
+          - node1
+          - node2
+
+    - name: Create the volume
+      shell: sudo gluster volume create gv0 replica 3 master:/data node1:/data node2:/data force
+
+    - name: Start volume
+      shell: sudo gluster volume start gv0

playbooks/nodes-conf.yml

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+---
+- hosts: nodes
+  become: true
+  tasks:
+    - name: Mount GlusterFS
+      mount:
+        name: /mnt
+        fstype: glusterfs
+        opts: _netdev,defaults
+        src: "localhost:/gv0"
+        state: mounted
+- hosts: node1
+  tasks:
+    - name: Create file
+      shell: echo "Hello world!" | sudo tee /mnt/helloworld-node1.txt
+- hosts: node2
+  tasks:
+    - name: Create file
+      shell: echo "Hello world!" | sudo tee /mnt/helloworld-node2.txt

scripts/configuration.sh

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+echo "192.168.69.10 master" >> /etc/hosts
+echo "192.168.69.100	node1" >> /etc/hosts
+echo "192.168.69.101	node2" >> /etc/hosts

scripts/glusterfs.sh

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+yum install -y centos-release-gluster
+yum install -y glusterfs-server
+# yum install -y xfsprogs
+service glusterd start
+
+sfdisk /dev/sdb << EOF
+;
+EOF
+
+mkfs.xfs /dev/sdb1
+mkdir -p /gluster/data 
+# echo "/dev/sdb1 /gluster/data xfs default 1 2" >> /etc/fstab
+mount /dev/sdb1 /gluster/data/
+#mount -a && mount