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feat!: Create least privilege default service account (#1757)
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@abhikaddy
abhikaddy authored Oct 26, 2023
1 parent 9b5abc1 commit 350faa7
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Showing 11 changed files with 28 additions and 230 deletions.
25 changes: 2 additions & 23 deletions autogen/main/sa.tf.tmpl
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Expand Up @@ -45,31 +45,10 @@ resource "google_service_account" "cluster_service_account" {
display_name = "Terraform-managed service account for cluster ${var.name}"
}

resource "google_project_iam_member" "cluster_service_account-log_writer" {
resource "google_project_iam_member" "cluster_service_account-nodeService_account" {
count = var.create_service_account ? 1 : 0
project = google_service_account.cluster_service_account[0].project
role = "roles/logging.logWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-metric_writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-log_writer[0].project
role = "roles/monitoring.metricWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-monitoring_viewer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-metric_writer[0].project
role = "roles/monitoring.viewer"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-resourceMetadata-writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-monitoring_viewer[0].project
role = "roles/stackdriver.resourceMetadata.writer"
role = "roles/container.nodeServiceAccount"
member = google_service_account.cluster_service_account[0].member
}

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8 changes: 8 additions & 0 deletions docs/upgrading_to_v29.0.md
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@@ -0,0 +1,8 @@
# Upgrading to v29.0
The v29.0 release of *kubernetes-engine* is a backwards incompatible
release.

### Default cluster service account permissions modified

When `create_service_account` is `true`, the service account will now be created with `Kubernetes Engine Node Service Account` role instead of `Logs Writer`, `Monitoring Metric Writer`, `Monitoring Viewer` and `Stackdriver Resource Metadata Writer` roles.
This is the Google recommended least privileged role to be used for the service account attached to the GKE Nodes.
25 changes: 2 additions & 23 deletions modules/beta-autopilot-private-cluster/sa.tf
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Expand Up @@ -45,31 +45,10 @@ resource "google_service_account" "cluster_service_account" {
display_name = "Terraform-managed service account for cluster ${var.name}"
}

resource "google_project_iam_member" "cluster_service_account-log_writer" {
resource "google_project_iam_member" "cluster_service_account-nodeService_account" {
count = var.create_service_account ? 1 : 0
project = google_service_account.cluster_service_account[0].project
role = "roles/logging.logWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-metric_writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-log_writer[0].project
role = "roles/monitoring.metricWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-monitoring_viewer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-metric_writer[0].project
role = "roles/monitoring.viewer"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-resourceMetadata-writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-monitoring_viewer[0].project
role = "roles/stackdriver.resourceMetadata.writer"
role = "roles/container.nodeServiceAccount"
member = google_service_account.cluster_service_account[0].member
}

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25 changes: 2 additions & 23 deletions modules/beta-autopilot-public-cluster/sa.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -45,31 +45,10 @@ resource "google_service_account" "cluster_service_account" {
display_name = "Terraform-managed service account for cluster ${var.name}"
}

resource "google_project_iam_member" "cluster_service_account-log_writer" {
resource "google_project_iam_member" "cluster_service_account-nodeService_account" {
count = var.create_service_account ? 1 : 0
project = google_service_account.cluster_service_account[0].project
role = "roles/logging.logWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-metric_writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-log_writer[0].project
role = "roles/monitoring.metricWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-monitoring_viewer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-metric_writer[0].project
role = "roles/monitoring.viewer"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-resourceMetadata-writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-monitoring_viewer[0].project
role = "roles/stackdriver.resourceMetadata.writer"
role = "roles/container.nodeServiceAccount"
member = google_service_account.cluster_service_account[0].member
}

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25 changes: 2 additions & 23 deletions modules/beta-private-cluster-update-variant/sa.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -45,31 +45,10 @@ resource "google_service_account" "cluster_service_account" {
display_name = "Terraform-managed service account for cluster ${var.name}"
}

resource "google_project_iam_member" "cluster_service_account-log_writer" {
resource "google_project_iam_member" "cluster_service_account-nodeService_account" {
count = var.create_service_account ? 1 : 0
project = google_service_account.cluster_service_account[0].project
role = "roles/logging.logWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-metric_writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-log_writer[0].project
role = "roles/monitoring.metricWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-monitoring_viewer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-metric_writer[0].project
role = "roles/monitoring.viewer"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-resourceMetadata-writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-monitoring_viewer[0].project
role = "roles/stackdriver.resourceMetadata.writer"
role = "roles/container.nodeServiceAccount"
member = google_service_account.cluster_service_account[0].member
}

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25 changes: 2 additions & 23 deletions modules/beta-private-cluster/sa.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -45,31 +45,10 @@ resource "google_service_account" "cluster_service_account" {
display_name = "Terraform-managed service account for cluster ${var.name}"
}

resource "google_project_iam_member" "cluster_service_account-log_writer" {
resource "google_project_iam_member" "cluster_service_account-nodeService_account" {
count = var.create_service_account ? 1 : 0
project = google_service_account.cluster_service_account[0].project
role = "roles/logging.logWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-metric_writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-log_writer[0].project
role = "roles/monitoring.metricWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-monitoring_viewer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-metric_writer[0].project
role = "roles/monitoring.viewer"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-resourceMetadata-writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-monitoring_viewer[0].project
role = "roles/stackdriver.resourceMetadata.writer"
role = "roles/container.nodeServiceAccount"
member = google_service_account.cluster_service_account[0].member
}

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25 changes: 2 additions & 23 deletions modules/beta-public-cluster-update-variant/sa.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -45,31 +45,10 @@ resource "google_service_account" "cluster_service_account" {
display_name = "Terraform-managed service account for cluster ${var.name}"
}

resource "google_project_iam_member" "cluster_service_account-log_writer" {
resource "google_project_iam_member" "cluster_service_account-nodeService_account" {
count = var.create_service_account ? 1 : 0
project = google_service_account.cluster_service_account[0].project
role = "roles/logging.logWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-metric_writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-log_writer[0].project
role = "roles/monitoring.metricWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-monitoring_viewer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-metric_writer[0].project
role = "roles/monitoring.viewer"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-resourceMetadata-writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-monitoring_viewer[0].project
role = "roles/stackdriver.resourceMetadata.writer"
role = "roles/container.nodeServiceAccount"
member = google_service_account.cluster_service_account[0].member
}

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25 changes: 2 additions & 23 deletions modules/beta-public-cluster/sa.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -45,31 +45,10 @@ resource "google_service_account" "cluster_service_account" {
display_name = "Terraform-managed service account for cluster ${var.name}"
}

resource "google_project_iam_member" "cluster_service_account-log_writer" {
resource "google_project_iam_member" "cluster_service_account-nodeService_account" {
count = var.create_service_account ? 1 : 0
project = google_service_account.cluster_service_account[0].project
role = "roles/logging.logWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-metric_writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-log_writer[0].project
role = "roles/monitoring.metricWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-monitoring_viewer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-metric_writer[0].project
role = "roles/monitoring.viewer"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-resourceMetadata-writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-monitoring_viewer[0].project
role = "roles/stackdriver.resourceMetadata.writer"
role = "roles/container.nodeServiceAccount"
member = google_service_account.cluster_service_account[0].member
}

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25 changes: 2 additions & 23 deletions modules/private-cluster-update-variant/sa.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -45,31 +45,10 @@ resource "google_service_account" "cluster_service_account" {
display_name = "Terraform-managed service account for cluster ${var.name}"
}

resource "google_project_iam_member" "cluster_service_account-log_writer" {
resource "google_project_iam_member" "cluster_service_account-nodeService_account" {
count = var.create_service_account ? 1 : 0
project = google_service_account.cluster_service_account[0].project
role = "roles/logging.logWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-metric_writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-log_writer[0].project
role = "roles/monitoring.metricWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-monitoring_viewer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-metric_writer[0].project
role = "roles/monitoring.viewer"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-resourceMetadata-writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-monitoring_viewer[0].project
role = "roles/stackdriver.resourceMetadata.writer"
role = "roles/container.nodeServiceAccount"
member = google_service_account.cluster_service_account[0].member
}

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25 changes: 2 additions & 23 deletions modules/private-cluster/sa.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -45,31 +45,10 @@ resource "google_service_account" "cluster_service_account" {
display_name = "Terraform-managed service account for cluster ${var.name}"
}

resource "google_project_iam_member" "cluster_service_account-log_writer" {
resource "google_project_iam_member" "cluster_service_account-nodeService_account" {
count = var.create_service_account ? 1 : 0
project = google_service_account.cluster_service_account[0].project
role = "roles/logging.logWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-metric_writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-log_writer[0].project
role = "roles/monitoring.metricWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-monitoring_viewer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-metric_writer[0].project
role = "roles/monitoring.viewer"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-resourceMetadata-writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-monitoring_viewer[0].project
role = "roles/stackdriver.resourceMetadata.writer"
role = "roles/container.nodeServiceAccount"
member = google_service_account.cluster_service_account[0].member
}

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25 changes: 2 additions & 23 deletions sa.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -45,31 +45,10 @@ resource "google_service_account" "cluster_service_account" {
display_name = "Terraform-managed service account for cluster ${var.name}"
}

resource "google_project_iam_member" "cluster_service_account-log_writer" {
resource "google_project_iam_member" "cluster_service_account-nodeService_account" {
count = var.create_service_account ? 1 : 0
project = google_service_account.cluster_service_account[0].project
role = "roles/logging.logWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-metric_writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-log_writer[0].project
role = "roles/monitoring.metricWriter"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-monitoring_viewer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-metric_writer[0].project
role = "roles/monitoring.viewer"
member = google_service_account.cluster_service_account[0].member
}

resource "google_project_iam_member" "cluster_service_account-resourceMetadata-writer" {
count = var.create_service_account ? 1 : 0
project = google_project_iam_member.cluster_service_account-monitoring_viewer[0].project
role = "roles/stackdriver.resourceMetadata.writer"
role = "roles/container.nodeServiceAccount"
member = google_service_account.cluster_service_account[0].member
}

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