--- default: provisioner: docker images: ['litmusimage/debian:8'] vagrant: provisioner: vagrant images: ['centos/7', 'generic/ubuntu1804'] travis_deb: provisioner: docker images: ['litmusimage/debian:9', 'litmusimage/debian:10'] travis_ub: provisioner: docker images: ['litmusimage/ubuntu:16.04', 'litmusimage/ubuntu:18.04'] travis_el6: provisioner: docker images: [] travis_el7: provisioner: docker images: [] release_checks: provisioner: vmpooler images: ['debian-8-x86_64', 'debian-9-x86_64', 'debian-10-x86_64', 'ubuntu-1404-x86_64', 'ubuntu-1604-x86_64', 'ubuntu-1804-x86_64']