jd@iad-rs-salt-master:~$ sudo salt 'iad-rs-service-1' grains.append service:service
iad-rs-service-1:
    ----------
    service:blacklist
        - bis
        - auth
        - event_log
jd@iad-rs-salt-master:~$ sudo salt 'iad-rs-service-1' grains.get service:blacklist
iad-rs-service-1:
    - bis
    - auth
jd@iad-rs-salt-master:~$ sudo salt 'iad-rs-service-1' grains.setval service:blacklist ['event_log','bis','auth']
iad-rs-service-1:
  service:blacklist
      event_log
      bis
      auth
jd@iad-rs-salt-master:~$ sudo salt 'iad-rs-service-1' grains.get service:blacklist
iad-rs-service-1:
    - bis
    - auth