env
|-- development
|   |-- attributes
|   |   `-- dns.yml                      # Attributes of this env (dns suffix, dns servers IPs, zookeeper IPs, ...)
|   |-- services                         # list of services in this env
|   |   |-- loadbalancer                 
|   |   |   |-- attributes               # loadbalancer attributes in this env
|   |   |   |   `-- nginx.yml            # any structure configuration
|   |   |   |-- unit.tmpl                # template uses to generate the systemd's units for loadbalancer
|   |   |   `-- service-manifest.yml     # manifest for this service
|   |   |-- cassandra
|   |   |   |-- attributes
|   |   |   |   |-- cassandra.yml        # cassandra configuration for this env (DC name, seeds nodes, cluster name)
|   |   |   |   `-- datastax-agent.yml   # another configuration file that will be merged with the other one
|   |   |   `-- service-manifest.yml    
|   |   ...
|   `-- config.yml                       # configuration of this env (fleet)
|-- prod-DC1
|   ...
|-- prod-DC2
|   ...
|-- preprod
|   ...

- check                            check that all units are up to date and running in this env
- fleetctl                         run custom fleetctl command
- list-units                       list all units in this env
- generate                         generate all units in this env

- generate                         generate units of this service
- check                            check that all units of this service are up to date and running
- diff                             display diff of units between when is generated and what is running in this env
- lock                             lock this service. nobody will be able to run mutable actions
- unlock                           unlock the service
- list-units                       list-units of this service in fleet
- update                           run a update of all units for this service

- start                            start the service
- stop                             stop the service
- update                           update the service
- restart                          restart the service
- destroy                          destroy the service
- status                           display fleet status of the unit
- journal                          display unit's journal
- diff                             display the diff between genetated and what is running
- check                            check that the service is running and is up to date
- unload                           unload the unit
- load                             load the unit
- ssh                              ssh on the server's running this unit

workPath: /home/myuser/build-tools           # root directory of environments. all envs have to be in an env/ directory in it

[Unit]
Description=pod-cassandra {{.hostname}}
After=mnt-sda9-{{.hostname}}-mount-sdb1.mount \
      mnt-sda9-{{.hostname}}-mount-sdc1.mount \
      mnt-sda9-{{.hostname}}-mount-sdd1.mount \
      mnt-sda9-{{.hostname}}-mount-sde1.mount \

[Service]
{{.environmentAttributes}}
ExecStartPre=/opt/bin/rkt gc --grace-period=0s --expire-prepared=0s
ExecStartPre=-/opt/bin/rkt image gc
ExecStart=/opt/bin/rkt --insecure-skip-verify run \
    --private-net='bond0:IP={{.ip}}' \
    --volume=cassandra-mount-1,kind=host,source=/mnt/sda9/{{.hostname}}/mount/sdb1 \
    --volume=cassandra-mount-2,kind=host,source=/mnt/sda9/{{.hostname}}/mount/sdc1 \
    --volume=cassandra-mount-3,kind=host,source=/mnt/sda9/{{.hostname}}/mount/sdd1 \
    --volume=cassandra-mount-4,kind=host,source=/mnt/sda9/{{.hostname}}/mount/sde1 \
    --volume=cassandra-commitlog,kind=host,source=/mnt/sda9/{{.hostname}}/commitlog \
    --volume=cassandra-savedcaches,kind=host,source=/mnt/sda9/{{.hostname}}/saved_caches \
    --set-env=CONFD_OVERRIDE='{{.environmentAttributesVars}}' \
    --set-env=HOSTNAME={{.hostname}} \
    --set-env=DOMAINNAME="{{.domainname}}" \
    {{.acis}}

[X-Fleet]
{{range .fleet -}}
    {{- . }}
{{end -}}