Create a TDE-enabled cluster

Select a documentation version:

You can secure your data at rest and protect sensitive information by enabling transparent data encryption (TDE) in AlloyDB Omni. This document describes how to create a TDE-enabled cluster by providing required vault environment variables and the --tde-kek-url flag in the POSTGRES_INITDB_ARGS environment variable during database initialization.

Before you begin

Create the cluster

To create a TDE-enabled cluster, you must pass the necessary Key Management Service (KMS) configuration and authentication credentials during the initialization of the database. The only supported authentication type is jwt.

Select the tab for your container runtime.

Docker

docker run -d --name CONTAINER_NAME \
--network host \
-v DATA_DIR:/var/lib/postgresql/data \
-v VAULT_CERT_PATH_ON_DISK:VAULT_CERT_PATH \
-e VAULT_AUTH_TYPE=jwt \
-e VAULT_AUTH_MOUNT=JWT_AUTH_ENGINE_MOUNT \
-e VAULT_JWT_PATH=JWT_FILE_PATH \
-e VAULT_ROLE=VAULT_ROLE \
-e VAULT_CERT_PATH=VAULT_CERT_PATH \
-e POSTGRES_INITDB_ARGS=" \
--tde-kek-url=KEK_URL" \
google/alloydbomni:IMAGE_TAG

Docker

docker run -d --name CONTAINER_NAME \
--network host \
-v DATA_DIR:/var/lib/postgresql/data \
-v VAULT_CERT_PATH_ON_DISK:VAULT_CERT_PATH \
-e VAULT_AUTH_TYPE=jwt \
-e VAULT_AUTH_MOUNT=JWT_AUTH_ENGINE_MOUNT \
-e VAULT_JWT_PATH=JWT_FILE_PATH \
-e VAULT_ROLE=VAULT_ROLE \
-e VAULT_CERT_PATH=VAULT_CERT_PATH \
-e POSTGRES_INITDB_ARGS=" \
--tde-kek-url=KEK_URL" \
google/alloydbomni:IMAGE_TAG

Podman

podman run -d --name CONTAINER_NAME \
--network host \
-v DATA_DIR:/var/lib/postgresql/data \
-v VAULT_CERT_PATH_ON_DISK:VAULT_CERT_PATH \
-e VAULT_AUTH_TYPE=jwt \
-e VAULT_AUTH_MOUNT=JWT_AUTH_ENGINE_MOUNT \
-e VAULT_JWT_PATH=JWT_FILE_PATH \
-e VAULT_ROLE=VAULT_ROLE \
-e VAULT_CERT_PATH=VAULT_CERT_PATH \
-e POSTGRES_INITDB_ARGS=" \
--tde-kek-url=KEK_URL" \
google/alloydbomni:IMAGE_TAG

Podman

podman run -d --name CONTAINER_NAME \
--network host \
-v DATA_DIR:/var/lib/postgresql/data \
-v VAULT_CERT_PATH_ON_DISK:VAULT_CERT_PATH \
-e VAULT_AUTH_TYPE=jwt \
-e VAULT_AUTH_MOUNT=JWT_AUTH_ENGINE_MOUNT \
-e VAULT_JWT_PATH=JWT_FILE_PATH \
-e VAULT_ROLE=VAULT_ROLE \
-e VAULT_CERT_PATH=VAULT_CERT_PATH \
-e POSTGRES_INITDB_ARGS=" \
--tde-kek-url=KEK_URL" \
google/alloydbomni:IMAGE_TAG

Replace the following:

  • CONTAINER_NAME: the name of the container to create. For example, alloydb-tde.
  • DATA_DIR: the local directory to mount as the data volume for AlloyDB Omni. For example, /local/data.
  • VAULT_AUTH_TYPE: the type of authentication to use for the vault connection. Only jwt is supported.
  • JWT_AUTH_ENGINE_MOUNT: path where the HashiCorp Vault authentication engine is mounted. For example, /auth/jwt.
  • JWT_FILE_PATH: path where vault JWT is stored on your nodes. For example, tde-tls/jwt-token.
  • (Optional) VAULT_ROLE: the client role defined in your vault setup that lets HashiCorp Vault verify the JWT token authenticity.
  • VAULT_CERT_PATH_ON_DISK: path to vault certificates on the host machine. For example, /local/vault/config.
  • VAULT_CERT_PATH: path where the certificates for the vault connection are located in your container. For example, /tde-tls. If not set, the certificates in the default trust store are used.
  • KEK_URL: The fully qualified URL to the KEK in HashiCorp Vault. Use vault as the protocol to specify HashiCorp Vault as the KMS provider—for example, vault://127.0.0.1:8200/v1/secrets/data/alloydb_kek.
  • IMAGE_TAG: Use 18.3.0 for the latest Debian image or 18.3.0-ubi for the latest UBI image.

To enable TDE for columnar engine cache data spilled to SSD storage, connect to your database instance and run the following query:

ALTER SYSTEM SET google_columnar_engine.enable_tde_for_storage_cache = 'on';

Restart your database server for the changes to take effect.

TDE metrics references

You can view all TDE metrics in AlloyDB Omni's monitoring agent. The following table describes each metric.

Name Description Label Unit Type
alloydb_omni_database_tde_data_blocks_decrypted_count_total Number of data blocks decrypted. Not applicable counter
alloydb_omni_database_tde_data_blocks_encrypted_count_total Number of data blocks encrypted. Not applicable counter
alloydb_omni_database_tde_data_decryption_time_us_total Total time spent in data block decryption. Not applicable microseconds counter
alloydb_omni_database_tde_data_encryption_time_us_total Total time spent in data block encryption. Not applicable microseconds counter
alloydb_omni_database_tde_enabled TDE enabled status. Not applicable gauge
alloydb_omni_database_tde_kek_info TDE KEK information.
  • kek_version: Version of the KEK
    in use for key wrapping.
  • kek_url: Fully qualified path
    to KEK in KMS
  • kek_creation_timestamp:
    Creation time of the KEK version in use.
 gauge
alloydb_omni_database_tde_temp_blocks_decrypted_count_total Number of temporary blocks decrypted. Not applicable counter
alloydb_omni_database_tde_temp_blocks_encrypted_count_total Number of temporary blocks encrypted. Not applicable counter
alloydb_omni_database_tde_temp_decryption_time_us_total Total time spent in temporary block decryption. Not applicable microseconds counter
alloydb_omni_database_tde_temp_encryption_time_us_total Total time spent in temporary block encryption. Not applicable microseconds counter
alloydb_omni_database_tde_wal_blocks_decrypted_count_total Number of WAL blocks decrypted. Not applicable counter
alloydb_omni_database_tde_wal_blocks_encrypted_count_total Number of WAL blocks encrypted. Not applicable counter
alloydb_omni_database_tde_wal_decryption_time_us_total Total time spent in WAL block decryption. Not applicable microseconds counter
alloydb_omni_database_tde_wal_encryption_time_us_total Total time spent in WAL block encryption. Not applicable microseconds counter
tde_chill_cache_blocks_encrypted Number of chill cache blocks encrypted. Not applicable counter
tde_chill_cache_blocks_decrypted Number of chill cache blocks decrypted. Not applicable counter
tde_chill_cache_blocks_total_encryption_time_us Total time spent in chill cache block encryption. Not applicable microseconds counter
tde_chill_cache_blocks_total_decryption_time_us Total time spent in chill cache block decryption. Not applicable microseconds counter
tde_ce_cache_ssd_blocks_encrypted Number of columnar cache blocks spilled to SSD storage that were encrypted. Not applicable counter
tde_ce_cache_ssd_blocks_decrypted Number of columnar cache blocks spilled to SSD storage that were decrypted. Not applicable counter
tde_ce_cache_ssd_blocks_total_encryption_time_us Total time spent encrypting columnar cache blocks spilled to SSD storage. Not applicable microseconds counter
tde_ce_cache_ssd_blocks_total_decryption_time_us Total time spent decrypting columnar cache blocks spilled to SSD storage. Not applicable microseconds counter