@classmethod
def ce_kill(cls, srv, *options, **kwargs):
    """
        Calls a remote proxy node to start the compute environment.
        """
    srvd = cls._ocean._get(srv)
    srchash = cls._ocean.freeze_hash(srv)
    assert srvd['type'] == 'environment'
    cls._proxy_ssh(srvd['ce-proxies'], srvd['ce-user'], 
        'OCEAN_CKSUM=%s OCEAN_PATH=~/ocean OCEAN_MANIFEST=~/ocean/manifest/manifest.json DOCKER_HOST=%s ocean kill %s'
         % (srchash, srvd['ce-docker'], srv))
