How to connect Vagrant wordpress VM to a DB one - mysql

Question

I want to connect a vagrant vm that installs WordPress and a SQL machine that installs MySQL server and I can't get it done. Anything would help. I basically wanna go in the web1 IP and have the WordPress. Now I get "Error establishing database connection". My Vagrantfile is this one:
( I want to connect web1 and db right now )
# -*- mode: ruby -*-
# vi: set ft=ruby :
Vagrant.configure("2") do |config|
config.vm.box = "generic/ubuntu2010"
# Web 1 - 192.168.33.10
config.vm.define "web1" do |web1|
web1.vm.provider "virtualbox" do |vb|
vb.name = "web1"
vb.memory = "1024"
end
web1.vm.hostname = "web1"
web1.vm.network "private_network", ip: "192.168.33.10"
web1.vm.network "forwarded_port", guest: 80, host: 8080
web1.vm.synced_folder "web1_wordpress", "/var/www/html"
web1.vm.provision "shell", inline: <<-SHELL
apt-get update
apt-get install -y apache2 php php-mysql
cd /var/www/html
wget -c http://wordpress.org/latest.zip
unzip latest.zip
mv wordpress/* .
rm index.html
touch wp-config.php
cp wp-config-sample.php wp-config.php
sed -i 's/database_name_here/wordpress/' wp-config.php
sed -i 's/username_here/wpuser/' wp-config.php
sed -i 's/password_here/wppass/' wp-config.php
SHELL
end
# Web 2 -192.168.33.20
config.vm.define "web2" do |web2|
web2.vm.provider "virtualbox" do |vb|
vb.name = "web2"
vb.memory = "1024"
end
web2.vm.hostname = "web2"
web2.vm.network "private_network", ip: "192.168.33.20"
web2.vm.network "forwarded_port", guest: 80, host: 8081
web2.vm.synced_folder "web2_wordpress", "/var/www/html"
web2.vm.provision "shell", inline: <<-SHELL
apt-get update
apt-get install -y apache2 php php-mysql
cd /var/www/html
wget -c http://wordpress.org/latest.zip
unzip latest.zip
mv wordpress/* .
rm index.html
touch wp-config.php
cp wp-config-sample.php wp-config.php
sed -i 's/database_name_here/wordpress/' wp-config.php
sed -i 's/username_here/wpuser/' wp-config.php
sed -i 's/password_here/wppass/' wp-config.php
SHELL
end
# DB - 192.168.33.30
config.vm.define "db" do |db|
db.vm.provider "virtualbox" do |vb|
vb.name = "db"
vb.memory = "1024"
end
db.vm.hostname = "db"
db.vm.network "private_network", ip: "192.168.33.30"
db.vm.provision "shell", inline: <<-SHELL
apt update
apt install -y mysql-server
mysql -u root -e "CREATE DATABASE wordpress;"
mysql -u root -e "CREATE USER 'wpuser'#'localhost' IDENTIFIED BY 'wppass';"
mysql -u root -e "GRANT ALL ON wordpress.* TO 'wpuser'#'localhost';"
SHELL
end
# LB - 192.168.33.40
config.vm.define "lb" do |lb|
lb.vm.provider "virtualbox" do |vb|
vb.name = "lb"
vb.memory = "1024"
end
lb.vm.hostname = "lb"
lb.vm.network "private_network", ip: "192.168.33.40"
lb.vm.network "forwarded_port", guest: 80, host: 80
lb.vm.provision "shell", inline: <<-SHELL
apt update
apt install -y haproxy
SHELL
end
end