Preparation Tasks

This topic walks you through the tasks you perform to prepare the primary and recovery cluster for disaster recovery. You perform the tasks in this section before a disaster has occurred.

In the preparation phase, you:

Configure the primary cluster
Configure the recovery cluster

Configure the Primary Cluster

You configure the primary cluster in order to enable WAL archiving and backing up to the repository.

VMware supplies template files for this configuration, located in /usr/local/gpdr/templates.

These configuration files contain such configuration information as the path to the repository storage location and the storage type. This information varies by storage type.

These configuration files are summarized in the following table:

Type	Description	Example Template
Posix	Configuration for Posix-compliant file systems and NFS	`posix_config_file.yml`
GCS	Configuration for Google Cloud Storage (GCS) and GCS-compatible objects	`gcs_config_file.yml`
S3	AWS S3 and S3-compatible object stores (for example, MinIO)	`s3_config_file.yml`
All 3 types	Additional useful options, such as archiving options and options governing expiration policy, among other things.	`optional-config-examples.yml`

Note
There is one configuration file for each type of storage. In addition to required options, you may also included optional options in your configuration file. These are provided in the optional-config-examples.yml file; simpl add them to the file of your choice, that is, POSIX, GCS or S3.

Steps to Configure

To configure the primary cluster, you:

Edit the configuration files
Run the gpdr configure backup --config-file command

As part of this process, GPDR restarts the primary cluster and WAL archiving begins.

Configure the Recovery Cluster

Prerequisites

Before running gpdr configure restore on the recovery cluster you must:

Before running gpdr configure restore on the recovery cluster you must: * Ensure that all the roles that existed on the primary cluster also exist on the recovery cluster * Install all the required extensions on the recovery cluster

Note
It is up to you to keep extensions in sync between the primary and recovery clusters.

Steps to Configure

There are two ways to configure a recovery cluster:

You provide the cluster to GPDR
GPDR provisions the cluster for you

In either of these cases, you must also pass the required --config-file option to gpdr configure restore.

Configuring Using a Cluster You Provide

In this scenario, you tell GPDR to use an existing, provisioned cluster as the recovery cluster. You run the gpdr configure restore command from this cluster's coordinator host.

To configure the recovery cluster:

Edit the config file
Run gpdr configure restore command with the --config-file option and –-use-existing-cluster

Configuring Using a Cluster GPDR Provides

In this scenario, you let GPDR initialize a recovery cluster for you. You configure a number of important settings for the recovery cluster, such as:

the data directory name for the coordinator and primary segment instances
the coordinator and primary segment host names and ports

We supply template files for recovery cluster configuration, located in /usr/local/gpdr/templates.

The following table summarizes each type of recovery cluster configuration file:

Description	Example Template
Recovery configuration for Greenplum 6	`recovery_cluster_config_file_gp6.yml`
Recovery configuration for Greenplum 7	`recovery_cluster_config_file_gp7.yml`

To configure the recovery cluster:

Edit the config file and the recovery cluster configuration file.
Run gpdr configure restore command with the --config-file and –recovery-cluster-config-file options.