我想要的是一个可以做以下事情的例子:
google_container_cluster
在GKE上创建一个Kubernetes集群kubernetes_namespace
我不确定的是如何连接新创建的集群和命名空间定义。例如,在添加google_container_node_pool
时,我可以做一些类似于cluster = "${google_container_cluster.hosting.name}"
的事情,但是对于kubernetes_namespace
,我没有看到类似的事情。
发布于 2018-04-30 16:51:45
理论上,可以在K8S (或任何其他)提供程序中引用来自GCP提供程序的资源,就像在单个提供程序的上下文中引用资源或数据源一样。
provider "google" {
region = "us-west1"
}
data "google_compute_zones" "available" {}
resource "google_container_cluster" "primary" {
name = "the-only-marcellus-wallace"
zone = "${data.google_compute_zones.available.names[0]}"
initial_node_count = 3
additional_zones = [
"${data.google_compute_zones.available.names[1]}"
]
master_auth {
username = "mr.yoda"
password = "adoy.rm"
}
node_config {
oauth_scopes = [
"https://www.googleapis.com/auth/compute",
"https://www.googleapis.com/auth/devstorage.read_only",
"https://www.googleapis.com/auth/logging.write",
"https://www.googleapis.com/auth/monitoring"
]
}
}
provider "kubernetes" {
host = "https://${google_container_cluster.primary.endpoint}"
username = "${google_container_cluster.primary.master_auth.0.username}"
password = "${google_container_cluster.primary.master_auth.0.password}"
client_certificate = "${base64decode(google_container_cluster.primary.master_auth.0.client_certificate)}"
client_key = "${base64decode(google_container_cluster.primary.master_auth.0.client_key)}"
cluster_ca_certificate = "${base64decode(google_container_cluster.primary.master_auth.0.cluster_ca_certificate)}"
}
resource "kubernetes_namespace" "n" {
metadata {
name = "blablah"
}
}
然而,在实践中,由于已知的核心错误打破了跨提供者依赖关系,它可能无法按预期工作,请分别参见https://github.com/hashicorp/terraform/issues/12393和https://github.com/hashicorp/terraform/issues/4149。
另一种解决办法是:
terraform apply -target=google_container_cluster.primary
和terraform apply
。/terraform-gke/main.tf
terraform {
backend "gcs" {
bucket = "tf-state-prod"
prefix = "terraform/state"
}
}
provider "google" {
region = "us-west1"
}
data "google_compute_zones" "available" {}
resource "google_container_cluster" "primary" {
name = "the-only-marcellus-wallace"
zone = "${data.google_compute_zones.available.names[0]}"
initial_node_count = 3
additional_zones = [
"${data.google_compute_zones.available.names[1]}"
]
master_auth {
username = "mr.yoda"
password = "adoy.rm"
}
node_config {
oauth_scopes = [
"https://www.googleapis.com/auth/compute",
"https://www.googleapis.com/auth/devstorage.read_only",
"https://www.googleapis.com/auth/logging.write",
"https://www.googleapis.com/auth/monitoring"
]
}
}
output "gke_host" {
value = "https://${google_container_cluster.primary.endpoint}"
}
output "gke_username" {
value = "${google_container_cluster.primary.master_auth.0.username}"
}
output "gke_password" {
value = "${google_container_cluster.primary.master_auth.0.password}"
}
output "gke_client_certificate" {
value = "${base64decode(google_container_cluster.primary.master_auth.0.client_certificate)}"
}
output "gke_client_key" {
value = "${base64decode(google_container_cluster.primary.master_auth.0.client_key)}"
}
output "gke_cluster_ca_certificate" {
value = "${base64decode(google_container_cluster.primary.master_auth.0.cluster_ca_certificate)}"
}
在这里,我们通过output
公开了所有必要的配置,并使用后端存储状态,以及在远程位置的这些输出,在本例中是GCS。这使我们能够在下面的配置中引用它。
/terraform-k8s/main.tf
data "terraform_remote_state" "foo" {
backend = "gcs"
config {
bucket = "tf-state-prod"
prefix = "terraform/state"
}
}
provider "kubernetes" {
host = "https://${data.terraform_remote_state.foo.gke_host}"
username = "${data.terraform_remote_state.foo.gke_username}"
password = "${data.terraform_remote_state.foo.gke_password}"
client_certificate = "${base64decode(data.terraform_remote_state.foo.gke_client_certificate)}"
client_key = "${base64decode(data.terraform_remote_state.foo.gke_client_key)}"
cluster_ca_certificate = "${base64decode(data.terraform_remote_state.foo.gke_cluster_ca_certificate)}"
}
resource "kubernetes_namespace" "n" {
metadata {
name = "blablah"
}
}
这里可能不清楚的是,在创建/更新任何K8S资源之前,必须创建/更新集群(如果这种更新依赖于集群的更新)。
采用第二种方法通常都是可取的(即使错误不是一个因素和跨提供者引用时也是如此),因为它减少了爆炸半径并定义了更明确的责任。这类部署通常有一个人/团队负责管理集群,另一个负责管理K8S资源。
当然,可能会有重叠--例如,操作系统希望在一个新的GKE集群之上部署日志和监视基础设施,因此跨提供者依赖关系旨在满足这样的用例。出于这个原因,我建议订阅上述GH发行。
https://stackoverflow.com/questions/50088355
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