Terraform我正在计数。索引始终为0

Terraform v0.12.29 provider.aws v3.7.0

Terraform我正在计数。索引始终为0

10.x0.0.0/23

resource "aws_subnet" "public" {
  count                   = length(var.availability_zones)
  vpc_id                  = aws_vpc.default.id
  cidr_block              = cidrsubnet(format("%s.%s.%s",join(".",slice(split(".",var.cidr_block), 0, 2)), count.index  ,split(".",var.cidr_block)[3]), var.public_newbits, count.index)
  availability_zone       = element(var.availability_zones, count.index)
  map_public_ip_on_launch = true
  tags                    = merge(map("Name", "${var.namespace}-${var.environment}-public-${count.index + 1}"), var.tags)
}

地形图

cidr_块两个子网中的值均为0

# aws_subnet.public[0] will be created
  + resource "aws_subnet" "public" {
      + arn                             = (known after apply)
      + assign_ipv6_address_on_creation = false
      + availability_zone               = "ap-southeast-1a"
      + availability_zone_id            = (known after apply)
      + cidr_block                      = "10.x0.0.0/27"
      + id                              = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
      + map_public_ip_on_launch         = true
      + owner_id                        = (known after apply)
      + vpc_id                          = (known after apply)
    }

  # aws_subnet.public[1] will be created
  + resource "aws_subnet" "public" {
      + arn                             = (known after apply)
      + assign_ipv6_address_on_creation = false
      + availability_zone               = "ap-southeast-1b"
      + availability_zone_id            = (known after apply)
      + cidr_block                      = "10.x0.0.32/27"
      + id                              = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
      + map_public_ip_on_launch         = true
      + owner_id                        = (known after apply)
      + vpc_id                          = (known after apply)
    }

---

这是我的错误的答案。cidrsubnet（）相当棘手，我花了一些时间才理解它

resource "aws_subnet" "public" {
  count                   = length(var.availability_zones)
  vpc_id                  = aws_vpc.default.id
  cidr_block              = cidrsubnet(var.cidr_block, var.public_newbits, count.index)
  availability_zone       = element(var.availability_zones, count.index)
  map_public_ip_on_launch = true
  tags                    = merge( var.tags, map("Name", "${var.environment}-${var.namespace}-mr-public-${count.index + 1}"))
}

---

var.availability\u zones

的形式是什么？能否请您澄清一下为什么您认为

count.index

为零？哪一个地方只有零？您的地形图显示，由于创建了两个子网，因此其不为零。还请指定两个cidr_块输出的预期结果，以及var.cidr_块的完整定义，var.public_块的完整定义。