[all] # Replace this with your hostname and IP address your-db-host.local ansible_ssh_host="1.2.3.4" your-synapse-host.local ansible_ssh_host="5.6.7.8" [db] your-db-host.local ansible_ssh_host="1.2.3.4" [synapse] your-synapse-host.local ansible_ssh_host="5.6.7.8"