[英]When does AWS deregister an EC2 from the auto-scaling group during scale-in?
[英]ec2 instances created by a launch template in auto-scaling group are not being registered with the target group
這些是我的 alb 配置,以備不時之需。 跳下來查看問題的實質。
resource "aws_autoscaling_attachment" "asg_attachment" {
autoscaling_group_name = aws_autoscaling_group.web.id
lb_target_group_arn = aws_lb_target_group.main.arn
}
resource "aws_lb" "main" {
name = "test-${var.env}-alb"
internal = false
load_balancer_type = "application"
security_groups = [aws_security_group.elb.id]
subnets = [aws_subnet.main1.id, aws_subnet.main2.id]
tags = {
Name = "${var.project_name}-${var.env}-alb"
Project = var.project_name
Environment = var.env
ManagedBy = "terraform"
}
}
resource "aws_lb_target_group" "main" {
name = "${var.project_name}-${var.env}-alb-tg"
port = 80
protocol = "HTTP"
vpc_id = aws_vpc.main.id
deregistration_delay = 30
health_check {
interval = 10
matcher = "200-299"
path = "/"
}
}
resource "aws_lb_listener" "main" {
load_balancer_arn = aws_lb.main.arn
protocol = "HTTPS"
port = "443"
ssl_policy = "ELBSecurityPolicy-TLS-1-2-2017-01"
certificate_arn = aws_acm_certificate.main.arn
default_action {
type = "forward"
target_group_arn = aws_lb_target_group.main.arn
}
}
============
我有一個通過 terraform 創建的自動縮放組:
resource "aws_autoscaling_group" "web" {
vpc_zone_identifier = [aws_subnet.main1.id]
launch_template {
id = aws_launch_template.web.id
version = "$Latest"
}
min_size = 1
max_size = 10
lifecycle {
create_before_destroy = true
}
}
啟動模板如下所示:
resource "aws_launch_template" "web" {
name_prefix = "${var.project_name}-${var.env}-autoscale-web-"
image_id = var.web_ami
instance_type = "t3.small"
key_name = var.key_name
vpc_security_group_ids = [aws_security_group.webserver.id]
}
如果我使用啟動配置而不是啟動模板,它會起作用:
resource "aws_launch_configuration" "web" {
image_id = var.web_ami
instance_type = "t3.small"
key_name = var.key_name
security_groups = [aws_security_group.webserver.id]
root_block_device {
volume_size = 8 # GB
volume_type = "gp3"
}
}
使用啟動配置時,添加了 autoscaling_group 中的一行:
launch_configuration = aws_launch_configuration.web.name
並且刪除了 launch_template 部分。
aws_launch_configuration 已棄用,所以我想使用 launch_template。
一切正常; 實例旋轉起來,我可以連接到它並且它通過了健康檢查。 問題是 EC2 實例不會自動注冊到目標組。 當我手動將其注冊到目標組時,一切正常。
如何讓使用啟動模板啟動的 EC2 實例自動添加到目標組?
結果 aws_autoscaling_attachment 也被棄用了,我需要添加:
target_group_arns = [aws_lb_target_group.main.arn]
到我的 aws_autoscaling_group。
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