More detailed information can be found in the Wiki
Trillian makes use a 'parent' CloudStack' environment which is used to build virtualised nested environments.
Trillian leverages ESXi's ability to virtualise the VT-x features allowing the creation of VT-x enabled virtualised hosts
Trillian uses Ansible 2 to create environment configuration files and deploy those environments. The user can run 2 commandline statements and go from 0 to a running cloudstack environment with multiple hosts.
as an example:
ansible-playbook generate-cloudconfig.yml --extra-vars 'env_name=trillian-test-env env_comment='\''example nested cloudstack test environment'\''  use_shared_storage=true env_version=cs410 mgmt=1 db=0 hvtype=k  kvm_os=7 hv=2 env_accounts=all pri=2 sec=1 esxi_use_dvswitch=no build_marvin=yes wait_till_setup=yes wait_for_template=yes mgmt_os=7' -i localhost
at the end of this the sugestion, You can now run: ansible-playbook deployvms.yml -i ./hosts_trillian-test-env, is put on the output, which would trigger you to run something like
ansible-playbook deployvms.yml -i ./hosts_trillian-test-env --extra-vars 'env_name=trillian-test-env env_version=cs410'
for more examples see the Wiki
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env_name[mandatory]: Environment name, single string, characters, numbers, underscore _ or dash - only.
- 
env_version[mandatory]: Environment CloudStack version (cs45, cs46, cs49, custom, etc).
- 
mgmt_os[mandatory]: Management server OS (6, 7, u, custom)
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hvtype[mandatory]: XenServer (x), KVM (k) or VMware (v)
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pri[mandatory]: number of primary storage pools.
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hv: number of hypervisors. Please note if hypervisor type is VMware the assumption is made that a single VC host is also required. This does not have to be specified anywhere.One of the following three is required depending on the choosen Hypervisor ( hvtype):- kvm_os:- 6= centos6.8
- 7= centos7.1
- u= ubuntu14.04
 
- xs_ver:- xs62sp1
- xs65sp1
 
- vmware_ver:- 55u3
- 60u1
 
 In order to avoid template issues, kvm_os,xs_verandvmware_verwill default to 'custom' when they are not specified.If you specify KVM as hypervisor ( hvtype=k) you must specify thekvm_osor set it to 'custom' and set the template to use (kvm_template) in the extra vars (kvm_template="Ubuntu Server 14.04")The same applies to the other hypervisor types. For custom VMware you would need to specify both the vCenter and ESXi templates 
- mgmt: Number of management servers to configure (default is 1)
- sec: number of secondary storage pools. (default is 1)
- db: Number of database servers to configure (default is 0 - db is on mgmt host)
- management_network: name of the management network
- guest_public_network: name of the guest+public network
- management_vm_hypervisor: parent CloudStack cloud hypervisor (default VMware)
- build_project: project name to use for the nested cloudstack build (default -NestedClouds)
- build_zone: parent cloud zone name
- build_keyboard: keyboard used for nested VMs (default UK)
- mgmtsrv_service_offering: parent cloud service offering used for the management server build
- mgmtsrv_template: parent cloud template used for the management server build
- dbsrv_service_offering: parent cloud service offering used for database server build
- dbsrv_template: parent cloud template used for database server build
- kvm_service_offering: parent cloud nested KVM instances service offering
- kvm_template: parent cloud nested KVM HV template
- xs_service_offering: parent cloud nested XenServer instances service offering
- xs_template: parent cloud nested XenServer HV template
- esxi_service_offering: parent cloud nested ESXi instances service offering
- esxi_template: parent cloud nested ESXi HV template
- vc_service_offering: parent cloud nested VC instances service offering
- vc_template: parent cloud nested VirtualCentre template
- baseurl_cloudstack: URL for CloudStack build repository
- env_db_name: environments database name
- env_db_ip: environments database IP address
- env_db_user: environments database username
- env_db_password: environments database password
- env_zonetype: basic or advanced (default)
- env_prihost: primary storage host fqdn or IP address
- env_sechost: secondary storage host fqdn or IP address
- env_zone_systemplate: URL to system template, overrides version variable
- build_marvin: whether or not to build a marvin vm for testing purposes (default is false)
- wait_till_setup: only return once system VMs are running. (default is no)
- env_name=ccs-xs-13-patest env_version=cs45 mgmt=1 hvtype=x hv=2 xs_ver=xs65sp1 env_accounts=all pri=1 build_marvin=true mgmt_os=6
- env_name=cs49-vmw55-pga env_version=cs49 mgmt_os=6 hvtype=v vmware_ver=55u3 hv=2 pri=2 env_accounts=all build_marvin=true wait_till_setup=yes baseurl_cloudstack=http://10.2.0.4/shapeblue/cloudstack/testing/
- env_name=cs49-kvm6-pga env_version=cs49 mgmt_os=6 env_accounts=all hvtype=k kvm_os=6 hv=2 pri=2 env_accounts=all build_marvin=true wait_till_setup=yes baseurl_cloudstack=http://10.2.0.4/shapeblue/cloudstack/testing/