Private Service Connect

REGION=<Your region code using the GCP format, for example: us-central1>
PROVIDER=gcp
KEY_ID=<Your ClickHouse key ID>
KEY_SECRET=<Your ClickHouse key secret>
ORG_ID=<Your ClickHouse organization ID>
SERVICE_NAME=<Your ClickHouse service name>

INSTANCE_ID=$(curl --silent --user "${KEY_ID:?}:${KEY_SECRET:?}" \
"https://api.clickhouse.cloud/v1/organizations/${ORG_ID:?}/services" | \
jq ".result[] | select (.region==\"${REGION:?}\" and .provider==\"${PROVIDER:?}\" and .name==\"${SERVICE_NAME:?}\") | .id " -r)

curl --silent --user "${KEY_ID:?}:${KEY_SECRET:?}" "https://api.clickhouse.cloud/v1/organizations/${ORG_ID:?}/services/${INSTANCE_ID:?}/privateEndpointConfig" | jq  .result
{
  "endpointServiceId": "projects/.../regions/us-central1/serviceAttachments/production-us-central1-clickhouse-cloud",
  "privateDnsHostname": "xxxxxxxxxx.us-central1.p.gcp.clickhouse.cloud"
}

provider "google" {
  project = "my-gcp-project"
  region  = "us-central1"
}

variable "region" {
  type    = string
  default = "us-central1"
}

variable "subnetwork" {
  type = string
  default = "https://www.googleapis.com/compute/v1/projects/my-gcp-project/regions/us-central1/subnetworks/default"
}

variable "network" {
  type = string
  default = "https://www.googleapis.com/compute/v1/projects/my-gcp-project/global/networks/default"
}

resource "google_compute_address" "psc_endpoint_ip" {
  address      = "10.128.0.2"
  address_type = "INTERNAL"
  name         = "your-ip-address"
  purpose      = "GCE_ENDPOINT"
  region       = var.region
  subnetwork   = var.subnetwork
}

resource "google_compute_forwarding_rule" "clickhouse_cloud_psc" {
  ip_address            = google_compute_address.psc_endpoint_ip.self_link
  name                  = "ch-cloud-${var.region}"
  network               = var.network
  region                = var.region
  load_balancing_scheme = ""
  # подключение сервиса GCP
  target = "https://www.googleapis.com/compute/v1/$TARGET" # См. примечания ниже
}

output "psc_connection_id" {
  value       = google_compute_forwarding_rule.clickhouse_cloud_psc.psc_connection_id
  description = "Add GCP PSC Connection ID to allow list on instance level."
}

cat <<EOF | tee pl_config_org.json
{
  "privateEndpoints": {
    "add": [
      {
        "cloudProvider": "gcp",
        "id": "${ENDPOINT_ID:?}",
        "description": "A GCP private endpoint",
        "region": "${REGION:?}"
      }
    ]
  }
}
EOF

cat <<EOF | tee pl_config_org.json
{
  "privateEndpoints": {
    "remove": [
      {
        "cloudProvider": "gcp",
        "id": "${ENDPOINT_ID:?}",
        "region": "${REGION:?}"
      }
    ]
  }
}
EOF

curl --silent --user "${KEY_ID:?}:${KEY_SECRET:?}" -X PATCH -H "Content-Type: application/json" "https://api.clickhouse.cloud/v1/organizations/${ORG_ID:?}" -d @pl_config_org.json

cat <<EOF | tee pl_config.json
{
  "privateEndpointIds": {
    "add": [
      "${ENDPOINT_ID}"
    ]
  }
}
EOF

cat <<EOF | tee pl_config.json
{
  "privateEndpointIds": {
    "remove": [
      "${ENDPOINT_ID}"
    ]
  }
}
EOF

curl --silent --user "${KEY_ID:?}:${KEY_SECRET:?}" -X PATCH -H "Content-Type: application/json" "https://api.clickhouse.cloud/v1/organizations/${ORG_ID:?}/services/${INSTANCE_ID:?}" -d @pl_config.json | jq

curl --silent --user "${KEY_ID:?}:${KEY_SECRET:?}" "https://api.clickhouse.cloud/v1/organizations/${ORG_ID:?}/services/${INSTANCE_ID:?}/privateEndpointConfig" | jq  .result

{
  ...
  "privateDnsHostname": "xxxxxxx.<region code>.p.gcp.clickhouse.cloud"
}

nslookup $DNS_NAME

Non-authoritative answer:
...
Address: 10.128.0.2

openssl s_client -connect ${DNS_NAME}:9440

curl --silent --user "${KEY_ID:?}:${KEY_SECRET:?}" -X GET -H "Content-Type: application/json" "https://api.clickhouse.cloud/v1/organizations/${ORG_ID:?}/services/${INSTANCE_ID:?}" | jq .result.privateEndpointIds
[
  "102600141743718403"
]