open-vault/website/content/api-docs/secret/databases/mongodb.mdx

---
layout: api
page_title: MongoDB - Database - Secrets Engines - HTTP API
description: >-
  The MongoDB plugin for Vault's database secrets engine generates database
  credentials to access MongoDB servers.
---

# MongoDB Database Plugin HTTP API

The MongoDB database plugin is one of the supported plugins for the database
secrets engine. This plugin generates database credentials dynamically based on
configured roles for the MongoDB database.

## Configure Connection

In addition to the parameters defined by the [Database
Backend](/api/secret/databases#configure-connection), this plugin
has a number of parameters to further configure a connection.

| Method | Path                     |
| :----- | :----------------------- |
| `POST` | `/database/config/:name` |

### Parameters

- `connection_url` `(string: <required>)` – Specifies the MongoDB standard
  connection string (URI). This field can be templated and supports passing the
  username and password parameters in the following format {{field_name}}. A
  templated connection URL is required when using root credential rotation.

- `write_concern` `(string: "")` - Specifies the MongoDB [write
  concern][mongodb-write-concern]. This is set for the entirety of the session,
  maintained for the lifecycle of the plugin process. Must be a serialized JSON
  object, or a base64-encoded serialized JSON object. The JSON payload values
  map to the values in the [Safe][mgo-safe] struct from the mgo driver.

- `username` `(string: "")` - The root credential username used in the connection URL.

- `password` `(string: "")` - The root credential password used in the connection URL.

- `tls_certificate_key` `(string: "")` - x509 certificate for connecting to the database.
  This must be a PEM encoded version of the private key and the certificate combined.

- `tls_ca` `(string: "")` - x509 CA file for validating the certificate presented by the
  MongoDB server. Must be PEM encoded.

- `username_template` `(string)` - [Template](/docs/concepts/username-templating) describing how
  dynamic usernames are generated.

<details>
<summary><b>Default Username Template</b></summary>

```
{{ printf "v-%s-%s-%s-%s" (.DisplayName | truncate 15) (.RoleName | truncate 15) (random 20) (unix_time) | truncate 100 }}
```

<details>
  <summary><b>Example Usernames:</b></summary>

| Example       |                                                      |
| ------------- | ---------------------------------------------------- |
| `DisplayName` | `token`                                              |
| `RoleName`    | `myrolename`                                         |
| Username      | `v-token-myrolename-jNFRlKsZZMxJEx60o66i-1614294836` |

| Example       |                                                                     |
| ------------- | ------------------------------------------------------------------- |
| `DisplayName` | `amuchlonger_dispname`                                              |
| `RoleName`    | `role-name-with-dashes`                                             |
| Username      | `v-amuchlonger_dis-role-name-with--jNFRlKsZZMxJEx60o66i-1614294836` |

</details>
</details>

### Sample Payload

```json
{
  "plugin_name": "mongodb-database-plugin",
  "allowed_roles": "readonly",
  "connection_url": "mongodb://{{username}}:{{password}}@mongodb.acme.com:27017/admin?ssl=true",
  "write_concern": "{ \"wmode\": \"majority\", \"wtimeout\": 5000 }",
  "username": "admin",
  "password": "Password!"
}
```

### Sample Request

```shell-session
$ curl \
    --header "X-Vault-Token: ..." \
    --request POST \
    --data @payload.json \
    http://127.0.0.1:8200/v1/database/config/mongodb
```

## Statements

Statements are configured during role creation and are used by the plugin to
determine what is sent to the database on user creation, renewing, and
revocation. For more information on configuring roles see the [Role
API](/api/secret/databases#create-role) in the database secrets engine docs.

### Parameters

The following are the statements used by this plugin. If not mentioned in this
list the plugin does not support that statement type.

- `creation_statements` `(string: <required>)` – Specifies the database
  statements executed to create and configure a user. Must be a
  serialized JSON object, or a base64-encoded serialized JSON object.
  The object can optionally contain a "db" string for session connection,
  and must contain a "roles" array. This array contains objects that holds
  a "role", and an optional "db" value, and is similar to the BSON document that
  is accepted by MongoDB's `roles` field. Vault will transform this array into
  such format. For more information regarding the `roles` field, refer to
  [MongoDB's documentation](https://docs.mongodb.com/manual/reference/method/db.createUser/).

- `revocation_statements` `(string: "")` – Specifies the database statements to
  be executed to revoke a user. Must be a serialized JSON object, or a base64-encoded
  serialized JSON object. The object can optionally contain a "db" string. If no
  "db" value is provided, it defaults to the "admin" database.

### Sample Creation Statement

```json
{
  "db": "admin",
  "roles": [
    {
      "role": "read",
      "db": "foo"
    }
  ]
}
```

### Sample Revocation Statement

```json
{
  "db": "vault-db"
}
```

[mongodb-write-concern]: https://docs.mongodb.com/manual/reference/write-concern/
[mgo-safe]: https://godoc.org/gopkg.in/mgo.v2#Safe