Migrating Dictionary Service installed with an embedded MongoDB

Before you begin

You have downloaded Talend Dictionary Service 7.2.x.

Procedure

Stop your instance of the previous version of Talend Dictionary Service but keep MongoDB running.

Back up the MongoDB instance used for the previous version of Talend Dictionary Service using the following command: mongodump -h <source_mongodb_host>:<source_mongo_port> -d <source_database> -u <source_mongodb_user> -p <source_mongodb_password> -o <dump_output>

The default value for the embedded MongoDB properties are the following:

Property	Value
mongodb.host	localhost
mongodb.port	27017
mongodb.database	dqdict
mongodb.user	dqdict-user
mongodb.password	duser

Example

mongodump -h localhost:27017 -d dqdict -u dqdict-user -p duser -o dump\

Stop your MongoDB instance.
Install Talend Dictionary Service 7.2.x with the embedded MongoDB, and do not start the instance.
If you have installed Talend Dictionary Service 7.2.x in service mode, stop the instance, delete the database and stop MongoDB:
1. Open a mongo shell as Talend Dictionary Service database user and execute the following commands.
  For Linux:
```
cd <install_dir>/mongodb/bin
./mongo dqdict -u dqdict-user -p duser --port 27017
```
  For Windows:
```
<install_dir>\mongodb\bin>mongo dqdict -u dqdict-user -p duser --port 27017
```
2. Switch to Talend Dictionary Service database: use dqdict
3. Drop the database: db.runCommand( { dropDatabase: 1 } )
4. Exit mongo shell: exit
5. Stop MongoDB.
If you have performed any custom configuration to the previous version of the <Tomcat>/conf/data-quality.properties file, update the 7.2.x version of the file by coping the values from the old configuration file.
Start MongoDB of the 7.2.x version.
Restore the backup performed on the MongoDB of the previous version of Talend Dictionary Service, on the 7.2.x MongoDB instance using the following command: mongorestore -h <source_mongodb_host>:<source_mongo_port> -d <source_database> -u <source_mongodb_user> -p <source_mongodb_password> dump\
Example
```
mongorestore -h localhost:27017 -d dqdict -u dqdict-user -p duser dump\            
```
Start Talend Dictionary Service 7.2.x by launching, in order:
- Apache Zookeeper
- Apache Kafka
- Apache Tomcat (Talend Administration Center server and Talend Identity and Access Management server)
- MongoDB

Results

You are now ready to use Talend Dictionary Service 7.2.x.

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