Update the MongoDB Version of a Deployment

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Consideration

Variables for API Resources to Update MongoDB Version
Prerequisite
Procedure

This tutorial describes how to use the API to migrate a MongoDB deployment to a new version of MongoDB. These steps assume you have an existing deployment that uses a 4.0.6 version of MongoDB, as would be the case if you used the tutorial to Deploy a Cluster through the API.

Note

Groups and projects are synonymous terms. Your {PROJECT-ID} is the same as your project id. For existing groups, your group/project id remains the same. This page uses the more familiar term group when referring to descriptions. The endpoint remains as stated in the document.

Consideration

The API supports most MongoDB settings and parameters for MongoDB versions 2.6 and later. To learn more, see MongoDB Settings and Automation Support.

Variables for API Resources to Update MongoDB Version

The API resources use one or more of these variables. Replace these variables with your desired values before calling these API resources.

Name	Type	Description
`PUBLIC-KEY`	string	Your public API Key for your API credentials.
`PRIVATE-KEY`	string	Your private API Key for your API credentials.
`<OpsManagerHost>:<Port>`	string	URL of your Ops Manager instance.
`GROUP-ID`	string	Unique identifier of your project from your project settings.
`CLUSTER-ID`	string	Unique identifier of your cluster.

Prerequisite

You must have credentials to access Ops Manager as a user with the Global Owner role.

Procedure

Retrieve the automation configuration from Ops Manager.

Use the automationConfig resource to retrieve the configuration. Issue the following command, replacing the placeholders with the Variables for API Resources to Update MongoDB Version.

curl --user "{PUBLIC-KEY}:{PRIVATE-KEY}" --digest \
     --request GET "https://<OpsManagerHost>:<Port>/api/public/v1.0/groups/{PROJECT-ID}/automationConfig?pretty=true" \
     --output currentAutomationConfig.json

Validate the downloaded Automation Configuration file.
Compare the version field of the currentAutomationConfig.json with that of the Automation Configuration backup file, mms-cluster-config-backup.json. The version value is the last element in both JSON documents. You can find this file on any host running the MongoDB Agent at:
- Linux and macOS: /var/lib/mongodb-mms-automation/mms-cluster-config-backup.json
- Windows: %SystemDrive%\MMSAutomation\versions\mms-cluster-config-backup.json
If the version values match, you are working with the current version of the Automation Configuration file.

Open the configuration document for editing.

As you edit the configuration document in the next steps, refer to the description of an automation configuration for detailed descriptions of settings.

Update the MongoDB version in the `processes` array.

Update every processes.version field to specify 4.2.1:

"version": "4.2.1"

Send the updated automation configuration.

Use the automationConfig resource to send the updated automation configuration.

Issue the following command with path to the updated configuration document and replace the placeholders with the Variables for API Resources to Update MongoDB Version.

curl --user "{PUBLIC-KEY}:{PRIVATE-KEY}" --digest \
     --header "Content-Type: application/json"
     --request PUT "https://<OpsManagerHost>:<Port>/api/public/v1.0/groups/{PROJECT-ID}/automationConfig?pretty=true" \
     --data @currentAutomationConfig.json

Upon successful update of the configuration, the API returns the HTTP 200 OK status code to indicate the request has succeeded.

Confirm successful update of the automation configuration.

Retrieve the automation configuration from Ops Manager and confirm it contains the changes. To retrieve the configuration, issue the following command, replacing the placeholders with the Variables for API Resources to Update MongoDB Version.

curl --user "{PUBLIC-KEY}:{PRIVATE-KEY}" --digest \
     --request GET "https://<OpsManagerHost>:<Port>/api/public/v1.0/groups/{PROJECT-ID}/automationConfig?pretty=true"

Check the deployment status to ensure goal state is reached.

Use the automationStatus resource to retrieve the deployment status. Issue the following command, replacing the placeholders with the Variables for API Resources to Update MongoDB Version.

curl --user "{PUBLIC-KEY}:{PRIVATE-KEY}" --digest \
     --request GET "https://<OpsManagerHost>:<Port>/api/public/v1.0/groups/{PROJECT-ID}/automationStatus?pretty=true"

Confirm that the values of all the lastGoalVersionAchieved fields in the processes array match the goalVersion field. To learn about deployment status, see Get Automation Status of Latest Plan.

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