Install and configure mongodb server

mongo_port port for mongodb to listen mongo_bind_ip ip-address for mongodb to listen

- hosts: dbhosts
  roles:
     - { role: db, mongo_port: 27017, mongo_bind_ip: 192.168.0.11 }

Role contains tests with molecule default is local vagrant driver

For remote test with gce driver use --scenario-name travis option and command like USER=travis GCE_SERVICE_ACCOUNT_EMAIL='<service-account>@<project-id>.iam.gserviceaccount.com' GCE_CREDENTIALS_FILE="$(pwd)/credentials.json" GCE_PROJECT_ID='<project-id>' molecule destroy --scenario-name travis

Travis CI is configured to make test in GCE

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