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Create a Cluster

IONOS MongoDB API allows you to create a MongoDB cluster.

Prerequisites

Before creating a cluster, make sure you have:

  • A data center.

  • Private LAN in that data center.

  • At least one client-server is connected to the private LAN. To connect to your cluster, clients must be able to resolve public DNS entries.

In the following examples, we assume that you want to use the data center UUID b1432c51-c20a-4f83-876f-c3a8a9e1fbec.

Sizing considerations

To list the available sizing templates using the API:

Request

curl --include \
    --user "clientname@ionos.com:Mb2.r5oHf-0t" \
    --header "Content-Type: application/json" \
    https://api.ionos.com/databases/mongodb/templates

Response

{
  "id": "templates",
  "type": "collection",
  "items": [
    {
      "id": "15c6dd2f-02d2-4987-b439-9a58dd59ecc3",
      "cores": 1,
      "ram": 1024,
      "storageSize": 30
    },
    {
      "id": "56ce4e71-b03a-42b2-85be-9a4520aa40be",
      ...
    },
    ...
  ],
  "offset": 0,
  "limit": 8,
  "_links": {}
}

Choose the sizing that fits your use case and specify it on cluster creation. For more information about how to calculate resource usage, see Sizing.

Currently, we do not support changing instance sizes for single instance clusters. You would need to create a new cluster for this.

For the following examples, we assume that you want to create a small test cluster and therefore chose the template 15c6dd2f-02d2-4987-b439-9a58dd59ecc3.

Preparing the network

Currently, the database cluster does not have automatic IP address management, and the only supported subnet is /24. To create a MongoDB cluster, specify as many free IP addresses as the number of instances in your cluster. Make sure that the IP addresses are not used by other servers in your LAN. You can choose the IP address by using one of the following methods:

  • You can choose the IP addresses of the subnet assigned to you by IONOS if you rely on IONOS-provided DHCP. The Network Interface Card (NIC) configuration contains information about the subnet. To prevent a collision with the DHCP IP range, choose an IP address between x.x.x.3/24 and x.x.x.10/24. The IONOS DHCP never assigns IP addresses in that range.

  • If you run your own DHCP, select IP addresses that cannot be assigned by your DHCP server.

  • If you assign IP addresses manually, you may use any IP addresses in that subnet and need to make sure that it is not used anywhere else.

For example, assume your private LAN uses the IP range 10.1.1.0/24 and you want a cluster with three instances. Then, you could provide us with the IP addresses 10.1.1.3/24, 10.1.1.4/24 and 10.1.1.5/24. Note that the prefix length (/24) still is the same as for the whole subnet. We only use the single IPs that you specify, but we need the prefix length to configure routing correctly.

Warning: You cannot delete a LAN while a database cluster is still attached. If you want to delete the LAN, then first delete the database cluster.

Creating the cluster

This request creates a database cluster with three instances of MongoDB version 5.0.

Note: Only contract administrators and owners can create and change database clusters. In contrast, the running database cluster can be accessed from all servers in the specified LAN.

Request

curl --include \
    --request POST \
    --user "clientname@ionos.com:Mb2.r5oHf-0t" \
    --header "Content-Type: application/json" \
    --data-binary '{
      "metadata": {},
      "properties": {
        "type": "replicaset",
        "edition": "business",
        "mongoDBVersion": "5.0",
        "instances": 3,
        "templateID": "15c6dd2f-02d2-4987-b439-9a58dd59ecc3",
        "location": "de/fra",
        "displayName": "Represents database name",
        "connections": [
          {
            "datacenterId": "b1432c51-c20a-4f83-876f-c3a8a9e1fbec",
            "lanId": "28",
            "cidrList": ["10.1.1.3/24", "10.1.1.4/24", "10.1.1.5/24"]
          }
        ],
        "maintenanceWindow": {
           "time": "16:30:59",
           "dayOfTheWeek": "Monday"
       }
      }
    }' \
    https://api.ionos.com/databases/mongodb/clusters

Response

Note: We will use 498ae72f-411f-11eb-9d07-046c59cc737e as example for the cluster ID in following examples.

{
  "type": "cluster",
  "id": "498ae72f-411f-11eb-9d07-046c59cc737e",
  "metadata": {
    "state": "BUSY",
    "health": "UNKNOWN",
    "createdDate": "2020-12-10T12:37:50.000Z",
    "createdBy": "clientname@ionos.com",
    "createdByUserId": "012342f-411f-1eeb-9d07-046c59cc737e"
  },
  "properties": {
    "type": "replicaset",
    "edition": "business",
    "displayName": "Represents database name",
    "location": "de/fra",
    "connections": [
      {
        "datacenterId": "b1432c51-c20a-4f83-876f-c3a8a9e1fbec",
        "lanId": "28",
        "cidr": [
          "10.1.1.3/24",
          "10.1.1.4/24",
          "10.1.1.5/24"
        ]
      }
    ],
    "templateID": "15c6dd2f-02d2-4987-b439-9a58dd59ecc3",
    "instances": 3,
    "maintenanceWindow": {
      "time": "16:30:59",
      "dayOfTheWeek": "Monday"
    },
    "connectionString": "mongodb+srv://m-65f4a879f126e3c4.mongodb.de-fra.ionos.com"
  }
}

At this point, you have created your first MongoDB cluster. The deployment of the database takes several minutes. To determine when your cluster is ready, see Querying database status.

Querying database status

You may have noticed that the state is BUSY and that the database cluster is unreachable. This is because the cloud creates a completely new cluster and needs to provision new instances. This process runs asynchronously in the background and might take several minutes.

You can poll the API to see when the state switches to AVAILABLE and health to HEALTHY meaning a fully functional cluster.

Request

To query a single cluster, you require the id from your "create" response.

curl --include \
    --user "clientname@ionos.com:Mb2.r5oHf-0t" \
    --header "Content-Type: application/json" \
    https://api.ionos.com/databases/mongodb/clusters/498ae72f-411f-11eb-9d07-046c59cc737e

If you do not know your MongoDB cluster-ID, you can also list all clusters and look for the one for which to query the status.

curl --include \
    --user "clientname@ionos.com:Mb2.r5oHf-0t" \
    --header "Content-Type: application/json" \
    https://api.ionos.com/databases/mongodb/clusters

Response

{
  "type": "collection",
  "id": "clusters",
  "items": [
    {
      "type": "cluster",
      "id": "498ae72f-411f-11eb-9d07-046c59cc737e",
      "metadata": {
        "state": "AVAILABLE",
        "health": "HEALTHY",
        "createdDate": "2020-12-10T12:37:50.000Z",
        "createdBy": "david.sertic@ionos.com",
        "createdByUserId": "012342f-411f-1eeb-9d07-046c59cc737e",
      },
      "properties": {
        "displayName": "a good name for a database",
        "location": "de/fra",
        "connectionString": "mongodb+srv://m-65f4a879f126e3c4.mongodb.de-fra.ionos.com",
      ...
      }
    }
  ],
  "offset": 0,
  "limit": 1,
  "_links": {}
}

Connect to cluster

Now that the cluster is available, you can connect to your MongoDB cluster using the mongo shell tool and the connection string from the API response and should see the mongo shell prompt:

Reminder: The connection must be performed from an extra VM.

$ mongosh "mongodb+srv://m-65f4a879f126e3c4.mongodb.de-fra.ionos.com"
Current Mongosh Log ID: 6304db914f263ebcb3ddaaf2
Connecting to:    mongodb+srv://m-65f4a879f126e3c4.mongodb.de-txl.ionos.com/?appName=mongosh+1.5.4
Using MongoDB:    6.0.10
Using Mongosh:    1.5.4

For mongosh info see: https://docs.mongodb.com/mongodb-shell/


To help improve our products, anonymous usage data is collected and sent to MongoDB periodically (https://www.mongodb.com/legal/privacy-policy).
You can opt-out by running the disableTelemetry() command.

Enterprise 5b8acdcc-22c6-11ed-bc22-c65c3b0754bf [primary] test>

Authentication

Connecting to a MongoDB cluster doesn't require authentication. However, nearly all other operations with a cluster require authentication. For example, when you try to list all databases:

> show dbs
MongoServerError: command listDatabases requires authentication

You cannot create or modify users from within MongoDB itself. The user management for IONOS MongoDB clusters happens completely via the IONOS API. You can read more about this in the documentation on Users Management.

Assume you have created a user jdoeionos on database example with the role readWrite on example. Then you can authenticate like this: and can afterward write and read data:

... example> db.exampleCollection.insertOne( { x: 1 } );
{
  acknowledged: true,
  insertedId: ObjectId("6304deee5c8e10bbd2c099a9")
}
... example> show dbs
example  40.00 KiB
... example> db.exampleCollection.find()
[ { _id: ObjectId("6304deee5c8e10bbd2c099a9"), x: 1 } ]

Result: You now have a ready-to-use MongoDB cluster.

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