security-groups.tf

resource "aws_security_group" "web-sg" {
  name        = "web-sg"
  description = "web-sg"
  vpc_id      = aws_vpc.todo-vpc.id

  ingress {
    from_port   = 80
    to_port     = 80
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }
  ingress {
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }

  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

resource "aws_security_group" "nlb-sg" {
  name        = "nlb-sg"
  description = "nlb-sg"
  vpc_id      = aws_vpc.todo-vpc.id

  ingress {
    from_port       = 8000
    to_port         = 8000
    protocol        = "tcp"
    security_groups = [aws_security_group.web-sg.id]
  }
}

resource "aws_security_group" "django-sg" {
  name        = "django-sg"
  description = "django-sg"
  vpc_id      = aws_vpc.todo-vpc.id

  ingress {
    from_port       = 22
    to_port         = 22
    protocol        = "tcp"
    security_groups = [aws_security_group.web-sg.id]
  }
  ingress {
    from_port       = 8000
    to_port         = 8000
    protocol        = "tcp"
    security_groups = [aws_security_group.nlb-sg.id]
  }

  egress {
    from_port       = 8000
    to_port         = 8000
    protocol        = "tcp"
    security_groups = [aws_security_group.nlb-sg.id]
  }
  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

resource "aws_security_group_rule" "nlb" {
  type                     = "egress"
  from_port                = 8000
  to_port                  = 8000
  protocol                 = "tcp"
  source_security_group_id = aws_security_group.django-sg.id
  security_group_id        = aws_security_group.nlb-sg.id
}

resource "aws_security_group" "db-sg" {
  name        = "db-sg"
  description = "db-sg"
  vpc_id      = aws_vpc.todo-vpc.id

  ingress {
    from_port       = 5432
    to_port         = 5432
    protocol        = "tcp"
    security_groups = [aws_security_group.django-sg.id]
  }
  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }
}