我有以下相对复杂的YAML:
apiVersion: v1
kind: ConfigMap
metadata:
name: aws-auth
namespace: kube-system
data:
mapRoles: |
- rolearn: ${aws_iam_role.tf-eks-node.arn}
username: system:node:{{EC2PrivateDNSName}}
groups:
- system:bootstrappers
- system:nodes
我现在想将其转换为Terraform-Kubernetes兼容的资源,该资源仅由字符串,列表和映射组成。我该怎么做呢? 我找到了一个使用连字符表示列表的LimitRange here外观示例:
resource "kubernetes_limit_range" "example" {
metadata {
name = "terraform-example"
}
spec {
limit {
type = "Pod"
max {
cpu = "200m"
memory = "1024M"
}
}
limit {
type = "PersistentVolumeClaim"
min {
storage = "24M"
}
}
limit {
type = "Container"
default {
cpu = "50m"
memory = "24M"
}
}
}
}
我目前对mapRoles块的尝试如下:
mapRole { rolearn = "${aws_iam_role.tf-eks-node.arn}"
username = "system:node:{{EC2PrivateDNSName}}"
groups = ["system:bootstrappers","system:nodes"]}
这是不正确的,因为mapRoles是一个列表(因为连字符所显示的单数元素是一个list元素);但是如果它是一个列表,并且连字符后面的所有内容都是list元素,那么列表标题是什么?
使用答案中提到的想法,我试图将元数据块预先放在数据块中:
data "template_file" "map_roles" {
template = <<EOF
- rolearn: ${var.arn}
username: system:node:{{EC2PrivateDNSName}}
groups:
- system:bootstrappers
- system:nodes
EOF
vars {
arn = "${var.kube-arn}"
}
}
resource "kubernetes_config_map" "aws_auth" {
metadata {
name = "aws-auth"
namespace = "kube-system"
}
data {
mapRoles = "${data.template_file.map_roles.template}"
}
}
答案 0 :(得分:1)
因此,当您在YAML中使用它时:
data:
mapRoles: |
这意味着|
之后的所有内容都是一个字符串,即mapRoles
的值。我不太确定那是你想要的。如果需要列表列表,则需要这样的内容:
data:
mapRoles:
- rolearn: ${aws_iam_role.tf-eks-node.arn}
- username: system:node:{{EC2PrivateDNSName}}
- groups:
- system:bootstrappers
- system:nodes
这将转化为HCL:
"data" = {
"mapRoles" = {
"rolearn" = "${aws_iam_role.tf-eks-node.arn}"
}
"mapRoles" = {
"username" = "system:node:{{EC2PrivateDNSName}}"
}
"mapRoles" = {
"groups" = ["system:bootstrappers", "system:nodes"]
}
}
答案 1 :(得分:1)
第一步是找到与您要查找的Terraform资源类型匹配的资源。 Terraform Kubernetes provider历来有些稀疏,但现在确实包含诸如Deployments和ConfigMaps之类的基本对象。 (但不是DaemonSets。)
正如@Rico在其答案中指出的那样,ConfigMap的SIGILL
只是从字符串名称到字符串值的映射,您的示例使用YAML多行字符串语法。 HCL具有与shell here-documents类似的语法。要进行插值,您还需要通过template进行插值。因此,您应该可以将其翻译为:
data:
答案 2 :(得分:0)
设法对David Maze的答案进行了一些更改:
resource "kubernetes_config_map" "aws_auth" {
metadata {
name = "aws-auth"
namespace = "kube-system"
}
data {
mapRoles = <<EOF
- rolearn: ${var.kube-arn}
username: system:node:{{EC2PrivateDNSName}}
groups:
- system:bootstrappers
- system:nodes
EOF
}
}
我缺少将|-输入放入EOF块的想法。 Terraform可以直接在该块中解析变量输入,因此我什至不需要数据块就可以首先设置模板。
答案 3 :(得分:0)
作为任何希望遍历变量(使用新的for
语法)的人的参考,我成功设置了以下aws-auth
configmap对象:
resource "kubernetes_config_map" "aws-auth" {
metadata {
name = "aws-auth"
namespace = "kube-system"
}
data = {
mapRoles = local.config_map_aws_auth
}
}
locals {
config_map_aws_auth = yamlencode(
concat([
{
"rolearn": aws_iam_role.nodes-assume-role.arn,
"username": "system:node:{{EC2PrivateDNSName}}",
"groups": [
"system:bootstrappers",
"system:nodes"
]
}
],
[
for team in var.teams :
{
"rolearn": "arn:aws:iam::${data.aws_caller_identity.current.account_id}:role/${team}-readonly",
"username": "${team}_readonly",
"groups": [
"view"
]
}
])
)
}