»Couchbase Database Secrets Engine
Couchbase is one of the supported plugins for the database secrets engine. This
plugin generates database credentials dynamically based on configured roles for
the Couchbase database.
See the database secrets engine docs for
more information about setting up the database secrets engine.
»Capabilities
Plugin Name |
Root Credential Rotation |
Dynamic Roles |
Static Roles |
couchbase-database-plugin |
Yes |
Yes |
Yes |
»Setup
-
Enable the database secrets engine if it is not already enabled:
$ vault secrets enable database
Success! Enabled the database secrets engine at: database/
$ vault secrets enable databaseSuccess! Enabled the database secrets engine at: database/
By default, the secrets engine will enable at the name of the engine. To
enable the secrets engine at a different path, use the -path
argument.
-
Configure Vault with the proper plugin and connection configuration:
$ vault write database/config/my-couchbase-database \
plugin_name="couchbase-database-plugin" \
hosts="couchbases://127.0.0.1" \
tls=true \
base64pem="${BASE64PEM}" \
username="vaultuser" \
password="vaultpass" \
allowed_roles="my-*-role"
$ vault write database/config/my-couchbase-database \ plugin_name="couchbase-database-plugin" \ hosts="couchbases://127.0.0.1" \ tls=true \ base64pem="${BASE64PEM}" \ username="vaultuser" \ password="vaultpass" \ allowed_roles="my-*-role"
Where ${BASE64PEM}
is the server's root certificate authority in PEM
format, encoded as a base64 string with no new lines.
To connect to clusters prior to version 6.5.0, a bucket_name
must also
be configured:
$ vault write database/config/my-couchbase-database \
plugin_name="couchbase-database-plugin" \
hosts="couchbases://127.0.0.1" \
tls=true \
base64pem="${BASE64PEM}" \
username="vaultuser" \
password="vaultpass" \
allowed_roles="my-*-role" \
bucket_name="travel-sample"
$ vault write database/config/my-couchbase-database \ plugin_name="couchbase-database-plugin" \ hosts="couchbases://127.0.0.1" \ tls=true \ base64pem="${BASE64PEM}" \ username="vaultuser" \ password="vaultpass" \ allowed_roles="my-*-role" \ bucket_name="travel-sample"
-
You should consider rotating the admin password. Note that if you do, the
new password will never be made available through Vault, so you should
create a Vault-specific database admin user for this.
vault write -force database/rotate-root/my-couchbase-database
vault write -force database/rotate-root/my-couchbase-database
»Usage
After the secrets engine is configured, configure dynamic and static roles
to enable generating credentials.
»Dynamic roles
-
Configure a dynamic role that maps a name in Vault to a JSON string
specifying a Couchbase RBAC role. The default value for
creation_statements
is a read-only admin role:
{"Roles": [{"role":"ro_admin"}]}
.
$ vault write database/roles/my-dynamic-role \
db_name="my-couchbase-database" \
creation_statements='{"Roles": [{"role":"ro_admin"}]}' \
default_ttl="5m" \
max_ttl="1h"
$ vault write database/roles/my-dynamic-role \ db_name="my-couchbase-database" \ creation_statements='{"Roles": [{"role":"ro_admin"}]}' \ default_ttl="5m" \ max_ttl="1h"
Note that any groups specified in the creation statement must already exist.
-
Generate a new credential by reading from the /creds
endpoint with the name
of the role:
$ vault read database/creds/my-dynamic-role
Key Value
--- -----
lease_id database/creds/my-dynamic-role/wiLNQjtcvCOT1VnN3qnUJnBz
lease_duration 5m
lease_renewable true
password mhyM-Gs7IpmOPnSqXEDe
username v-root-my-dynamic-role-eXnVr4gm55dpM1EVgTYz-1596815027
$ vault read database/creds/my-dynamic-roleKey Value--- -----lease_id database/creds/my-dynamic-role/wiLNQjtcvCOT1VnN3qnUJnBzlease_duration 5mlease_renewable truepassword mhyM-Gs7IpmOPnSqXEDeusername v-root-my-dynamic-role-eXnVr4gm55dpM1EVgTYz-1596815027
»Static roles
-
Configure a static role that maps a name in Vault to an existing couchbase
user.
$ vault write database/static-roles/my-static-role \
db_name="my-couchbase-database" \
username="my-existing-couchbase-user" \
rotation_period=5m
$ vault write database/static-roles/my-static-role \ db_name="my-couchbase-database" \ username="my-existing-couchbase-user" \ rotation_period=5m
-
Retrieve the credentials from the /static-creds
endpoint:
$ vault read database/static-creds/my-static-role
Key Value
--- -----
last_vault_rotation 2020-08-07T16:50:48.393354+01:00
password Z4-KH8F-VK5VJc0hSkXQ
rotation_period 5m
ttl 4m39s
username my-existing-couchbase-user
$ vault read database/static-creds/my-static-roleKey Value--- -----last_vault_rotation 2020-08-07T16:50:48.393354+01:00password Z4-KH8F-VK5VJc0hSkXQrotation_period 5mttl 4m39susername my-existing-couchbase-user
»API
The full list of configurable options can be seen in the Couchbase database plugin API page.
For more information on the database secrets engine's HTTP API please see the Database secret secrets engine API page.