Part of a component¶

Bouwblok Postgresql

## Introduction¶

Om PostgreSQL te installeren wordt gebruik gemaakt van Ansible.

For developing playbooks and roles, it's handy to use a local environment.

dit kan middels Virtuele machines op eigen laptop.

VirtualBox is a popular tool for running virtual machines (VMs).

Vagrant is a tool that provides a command-line interface (CLI) for interacting with VirtualBox and virtual machines (VMs).

```markdown¶

Requirements and Dependencies

For using Vagrant and VirtualBox, these programs must first be installed on a local laptop.

Om Ansible playbooks te runnen is Ansible nodig.

So:

- Ansible

- VirtualBox

- Vagrant

\- Git

## Uitvoering

To roll out a few VMs using Vagrant, a `Vagrantfile` is needed.

Logging into these VMs using SSH keys requires an SSH key pair.

Create this and then place it next to the Vagrantfile in the same directory:

create directory: `mkdir ~/Virtualmachines`

create a key pair:

```shell
ssh-keygen -t rsa -b <size> -f ~/Virtualmachines/id_rsa

maak Vagrantfile aan met onderstaande vulling  ( deze maakt 7 VM's aan, pas eventueel aan naar behoefte ):

```ruby
Vagrant.configure("2") do |config|

Base VM OS configuration.¶

# config.vm.box = "generic/rhel8"

# config.vm.box = "bento/rockylinux-8"

config.vm.box = "bento/ubuntu-20.04"

config.vm.synced_folder '.', '/vagrant', disabled: true

config.ssh.insert_key = false

config.vm.provider :virtualbox do |v|

v.memory = 2048

vcpus = 4

# v.linked_clone = true

end

Define three VMs with static private IP addresses.¶

boxes = [

{ :name => "server1.example.com", :ip => "192.168.56.11" },

{ :name => "server2.example.com", :ip => "192.168.56.12" },

{ name: "server3.example.com", ip: "192.168.56.13" },

{ name: "server4.example.com", ip: "192.168.56.14" },

{ "name": "server5.example.com", "ip": "192.168.56.15" },

{:name => "server6.example.com", :ip => "192.168.56.16"},

{ name: "server7.example.com", ip: "192.168.56.17" }

]

if Vagrant.has_plugin?('vagrant-registration')

config.registration.username = 'mailaddress@hcs-company.com'

config.registration.password = 'password_redhat.com'

end

Allocate resources for each of the virtual machines.¶

boxes.each do |opts|

config.vm.define opts[:name] do |config|

config.vm.hostname = opts[:name]

config.vm.network :private_network, ip: opts[:ip]

config.vm.provision "file", source: "id_rsa", destination: "/home/vagrant/.ssh/id_rsa"

public_key = File.read("id_rsa.pub")

config.vm.provision :shell, inline: "

echo 'Copying Ansible VM public SSH keys to the VM'

mkdir -p /home/vagrant/.ssh

chmod 700 /home/vagrant/.ssh

echo '#{public_key}' >> /home/vagrant/.ssh/authorized_keys

chmod -R 600 /home/vagrant/.ssh/authorized_keys

echo 'Host 192.168.*.*' >> /home/vagrant/.ssh/config

echo 'StrictHostKeyChecking no' >> /home/vagrant/.ssh/config

echo 'UserKnownHostsFile /dev/null' >> /home/vagrant/.ssh/config

chmod -R 600 /home/vagrant/.ssh/config

, privileged: false

end

then run the following command:

vagrant up