4.5.3. Install MongoDB Applier

Note

The steps in this section relate specifically to applying to a standard MongoDB Instance. For configuring the applier to work with MongoDB Atlas, please refer to the following section: Section 4.5.4, “Install MongoDB Atlas Applier”

Installation of the MongoDB replication requires special configuration of the Source and Target hosts so that each is configured for the correct datasource type.

To configure the Applier replicators:

  1. Before installing the applier, the following additions need adding to the extractor configuration. Apply the following parameter to the extractor configuration before installing the applier

    Add the following the /etc/tungsten/tungsten.ini

    [alpha]
    ...Existing Replicator Config...
    enable-heterogeneous-service=true
    
    shell> tpm update

    Note

    The above step is only applicable for standalone extractors. If you are configuring replications from an existing Tungsten Cluster (Cluster-Extractor), follow the steps outlined here to ensure the cluster is configured correctly: Section 3.4.1, “Prepare: Replicating Data Out of a Cluster”

  2. Unpack the Tungsten Replicator distribution in staging directory:

    shell> tar zxf tungsten-replicator-7.0.3-141.tar.gz
  3. Change into the staging directory:

    shell> cd tungsten-replicator-7.0.3-141
  4. Configure the installation using tpm:

    Show Staging

    Show INI

    shell> ./tools/tpm configure defaults \
        --reset \
        --install-directory=/opt/continuent \
        --profile-script=~/.bash_profile \
        --rest-api-admin-user=apiuser \
        --rest-api-admin-pass=secret
    
    shell> ./tools/tpm configure alpha \
        --master=sourcehost \
        --members=localhost \
        --datasource-type=mongodb \
        --replication-user=tungsten \
        --replication-password=secret \
        --svc-applier-filters=dropstatementdata \
        --role=slave \
        --replication-port=27017
    
    shell> vi /etc/tungsten/tungsten.ini
    [defaults]
    install-directory=/opt/continuent
    profile-script=~/.bash_profile
    rest-api-admin-user=apiuser
    rest-api-admin-pass=secret
    
    [alpha]
    master=sourcehost
    members=localhost
    datasource-type=mongodb
    replication-user=tungsten
    replication-password=secret
    svc-applier-filters=dropstatementdata
    role=slave
    replication-port=27017
    

    Configuration group defaults

    The description of each of the options is shown below; click the icon to hide this detail:

    Click the icon to show a detailed description of each argument.

    Configuration group alpha

    The description of each of the options is shown below; click the icon to hide this detail:

    Click the icon to show a detailed description of each argument.

  5. Note

    If you plan to make full use of the REST API (which is enabled by default) you will need to also configure a username and password for API access. This must be done by specifying the following options in your configuration:

    rest-api-admin-user=tungsten
    rest-api-admin-pass=secret

  6. Once the prerequisites and configuring of the installation has been completed, the software can be installed:

    shell> ./tools/tpm install

If the installation process fails, check the output of the /tmp/tungsten-configure.log file for more information about the root cause.

Once the replicators have started, the status of the service can be checked using trepctl. See Section 4.5.5, “Management and Monitoring of MongoDB Deployments” for more information.