efs.tf

resource "aws_efs_file_system" "efs_volume" {
    creation_token = "efs_volume"
}

resource "aws_efs_mount_target" "mount_target_01" {
    file_system_id = aws_efs_file_system.efs_volume.id
    subnet_id = data.aws_subnet.public_subnet_01.id
    security_groups = [aws_security_group.efs_sg.id]
}

resource "aws_efs_mount_target" "mount_target_02" {
    file_system_id = aws_efs_file_system.efs_volume.id
    subnet_id = data.aws_subnet.public_subnet_02.id
    security_groups = [aws_security_group.efs_sg.id]
}

resource "tls_private_key" "ssh" {
    algorithm = "RSA"
    rsa_bits = 4096
}

resource "aws_key_pair" "ec2_key_pair" {
    key_name_prefix = "pst"
    public_key = tls_private_key.ssh.public_key_openssh
}

resource "local_file" "private_key" {
    content = tls_private_key.ssh.private_key_pem
    filename = var.private_key
}

data "aws_instances" "wordpress_instances" {
    instance_tags = {
        Env = "Prod"
    }
    depends_on = [
        aws_instance.server01,
        aws_instance.server02
    ]
}

resource "null_resource" "install_script" {
    count = 2
    depends_on = [
    aws_db_instance.rds_master,
    local_file.private_key,
    aws_efs_mount_target.mount_target_01,
    aws_efs_mount_target.mount_target_02,
    aws_instance.server01,
    aws_instance.server02]
    
    connection {
        type = "ssh"
        host = data.aws_instances.wordpress_instances.public_ips[count.index]
        user = "ec2-user"
        private_key = file(var.private_key)
    }
    
    provisioner "remote-exec" {
        inline = [
      "sudo yum update -y",
      "sudo yum install docker -y",
      "wget https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s)-$(uname -m)",
      "sudo mv docker-compose-$(uname -s)-$(uname -m) /usr/local/bin/docker-compose",
      "sudo chmod -v +x /usr/local/bin/docker-compose",
      "sudo systemctl enable docker.service",
      "sudo systemctl start docker.service",
      "sudo yum -y install amazon-efs-utils",
      "sudo mkdir -p ${var.mount_directory}",
      "sudo mount -t efs -o tls ${aws_efs_file_system.efs_volume.id}:/ ${var.mount_directory}",
      "sudo docker run --name wordpress-docker -e WORDPRESS_DB_USER=${aws_db_instance.rds_master.username} -e WORDPRESS_DB_HOST=${aws_db_instance.rds_master.endpoint} -e WORDPRESS_DB_PASSWORD=${aws_db_instance.rds_master.password} -v ${var.mount_directory}:${var.mount_directory} -p 80:80 -d wordpress:4.8-apache",
        ]
    }
}