For WordPress multisite environments on VIP, data syncs require a domain mapping config file to exist in the application’s GitHub repository. The settings in the domain mapping config file provide values for a search and replace to occur and correctly update the domain values for each network site in the synced database.
Domain mapping config file location
Domain mapping config files must be located in a /config/ directory added to the application’s
wpcomvip GitHub repository, in the branch that deploys to the production environment, usually
Select the “.vip.yml.config” link to create an automated blank config file for the environment in the application’s GitHub repository.
The root of a the branch with added domain mapping config files should have a structure similar to this example:
|-- client-mu-plugins/ |-- config/ |----- .vip.example.develop.yml |----- .vip.example.preprod.yml |-- images/ |-- languages/ |-- plugins/ |-- themes/ |-- vip-config/
It is possible to have multiple applications or environments using the same GitHub repository. Each of them will need a unique domain mapping config file. A specific naming convention for domain mapping config files is required for the data sync process to correctly identify the intended application and environment:
In this file naming convention:
[app]is the name/slug used to identify the (production) application.
[environment]is the environment that this config file applies to.
For example, a file named .vip.example.develop.yml would be used for syncing data to the “example” application’s “develop” environment.
In some (very rare) circumstances, multiple environments may be using the same environment name (e.g. multiple
develop environments). In this case, a unique naming convention can be appended to the non-production environment config:
An example of this file naming convention:
Setting up the domain mapping config file with the correct values and structure is essential for the data sync process to work as expected.
- YAML-based config files require spaces for indents, and indents are critical to YAML syntax. VIP recommends using two spaces for indents.
- Multisite environments can use a combination of domain values for network sites such as convenience names, custom domains, subdomains and subdirectories. For a successful data sync, the value added to the domain mapping config file for a network site must match the exact domain value set for that site, both for the origin environment and the destination environment.
- If a network site is set to a domain value that includes a
wwwprefix, the domain in the configuration file for that site must also include
wwwis redirected to a non-www URL, then configure the sync without
An example of the basic structure of a YAML domain mapping config file:
data_sync: domain_map: prod-url-1: nonprod-url-1 prod-url-2: nonprod-url-2
Domain mapping config file example #1
To sync data from a production environment that has two sites on its network set to the following domains:
To a non-production environment that has two corresponding network sites set to the following domains:
The following settings would be required for the domain mapping config file:
data_sync: domain_map: en.example.com: en-preprod.example.com fr.example.com: fr-preprod.example.com
When data sync runs, all instances of
en.example.com will be replaced with
en-preprod.example.com and all instances of
fr.example.com will be replaced with
Domain mapping config file example #2
A third network site is added to the production site used in the previous example with the subdirectory domain structure:
A third network site is also added to the non-production site:
The domain mapping config file will then need to be updated to:
data_sync: domain_map: en.example.com: en-preprod.example.com fr.example.com: fr-preprod.example.com example.com/translate: preprod.example.com/translate
Updates must be made to domain mapping config files when domains for network sites are added, removed, or modified across any of the environments.
Last updated: January 18, 2023