Thanks for responding @Alex_Piggott
No log directory exists in the /mnt/data/elastic/ALLOCATOR_ID/services/allocators/containers/elasticsearch/CLUSTER_ID, but there is a log in /mnt/data/elastic/:ALLOCATOR_ID/services/allocator/logs. I've included a snipit of the log file below. The last few lines repeate until it dies.
[2018-09-24 14:55:00,381][INFO ][no.found.runner.allocation.elasticsearch.ElasticsearchDockerContainerManager] Deleting container {"ec_container_kind":"elasticsearch","ec_container_group":"252e3238734343dbab69f5b3bb27a6e3","ec_container_name":"instance-0000000001"}
[2018-09-24 14:55:00,381][INFO ][no.found.docker.DockerContainerManager] Destroying container [fac-252e3238734343dbab69f5b3bb27a6e3-instance-0000000001] {"ec_container_kind":"elasticsearch","ec_container_group":"252e3238734343dbab69f5b3bb27a6e3","ec_container_name":"instance-0000000001"}
[2018-09-24 14:55:00,424][INFO ][no.found.runner.allocation.elasticsearch.ElasticsearchDockerContainerManager] Tearing down filesystem {"ec_container_kind":"elasticsearch","ec_container_group":"252e3238734343dbab69f5b3bb27a6e3","ec_container_name":"instance-0000000001"}
[2018-09-24 14:55:00,425][INFO ][no.found.runner.managers.XFSQuotaManager] Removing quota from [XFSProjectName(es,252e3238734343dbab69f5b3bb27a6e3,instance-0000000001)] {"ec_container_kind":"elasticsearch","ec_container_group":"252e3238734343dbab69f5b3bb27a6e3","ec_container_name":"instance-0000000001"}
[2018-09-24 14:55:00,429][WARN ][no.found.runner.managers.XFSQuotaManager] Command [[sudo, -n, xfs_quota, -x, -c, project -C -p /mnt/data/elastic/10.94.52.10/services/allocator/containers/elasticsearch/252e3238734343dbab69f5b3bb27a6e3/instance-0000000001/data 13008, /mnt/data]] returned status code [1]] with output: [E: [xfs_quota: cannot setup path for project dir /mnt/data/elastic/10.94.52.10/services/allocator/containers/elasticsearch/252e3238734343dbab69f5b3bb27a6e3/instance-0000000001/data: No such file or directory]] {}
[2018-09-24 14:55:00,432][WARN ][no.found.runner.managers.XFSQuotaManager] Command [[sudo, -n, xfs_quota, -x, -c, project -C -p /mnt/data/elastic/10.94.52.10/services/allocator/containers/elasticsearch/252e3238734343dbab69f5b3bb27a6e3/instance-0000000001/logs 13008, /mnt/data]] returned status code [1]] with output: [E: [xfs_quota: cannot setup path for project dir /mnt/data/elastic/10.94.52.10/services/allocator/containers/elasticsearch/252e3238734343dbab69f5b3bb27a6e3/instance-0000000001/data: No such file or directory], E: [xfs_quota: cannot setup path for project dir /mnt/data/elastic/10.94.52.10/services/allocator/containers/elasticsearch/252e3238734343dbab69f5b3bb27a6e3/instance-0000000001/logs: No such file or directory]] {}
[2018-09-24 14:55:00,435][WARN ][no.found.runner.managers.XFSQuotaManager] Command [[sudo, -n, xfs_quota, -x, -c, limit -p bhard=0 rtbhard=0 13008, /mnt/data]] returned status code [1]] with output: [E: [xfs_quota: cannot setup path for project dir /mnt/data/elastic/10.94.52.10/services/allocator/containers/elasticsearch/252e3238734343dbab69f5b3bb27a6e3/instance-0000000001/data: No such file or directory], E: [xfs_quota: cannot setup path for project dir /mnt/data/elastic/10.94.52.10/services/allocator/containers/elasticsearch/252e3238734343dbab69f5b3bb27a6e3/instance-0000000001/logs: No such file or directory], E: [xfs_quota: cannot set limits: Function not implemented]] {}
[2018-09-24 14:55:00,436][INFO ][no.found.runner.allocation.elasticsearch.ElasticsearchDockerContainerManager] Releasing network resources {"ec_container_kind":"elasticsearch","ec_container_group":"252e3238734343dbab69f5b3bb27a6e3","ec_container_name":"instance-0000000001"}
[2018-09-24 14:55:00,470][INFO ][no.found.runner.allocation.elasticsearch.ElasticsearchDockerContainerManager] Deallocated container {"ec_container_kind":"elasticsearch","ec_container_group":"252e3238734343dbab69f5b3bb27a6e3","ec_container_name":"instance-0000000001"}
[2018-09-24 14:55:00,470][INFO ][no.found.runner.allocation.elasticsearch.ElasticsearchDockerContainerManager] Telling [Actor[akka://default/user/$b/allocations#790836080]] about a successful deallocation {"ec_container_kind":"elasticsearch","ec_container_group":"252e3238734343dbab69f5b3bb27a6e3","ec_container_name":"instance-0000000001"}
[2018-09-24 14:55:00,470][INFO ][no.found.runner.allocation.AllocatorAllocationsManager] Stopping allocation: [Actor[akka://default/user/$b/allocations/elasticsearch-252e3238734343dbab69f5b3bb27a6e3-instance-0000000001-2#1426336881]] {}
[2018-09-24 14:55:00,471][INFO ][no.found.runner.allocation.elasticsearch.clustertask.ClusterTaskScheduler] [Actor[akka://default/user/$b/allocations/elasticsearch-252e3238734343dbab69f5b3bb27a6e3-instance-0000000001-2/scheduler#-1342683483]] Stopping scheduling of tasks {"ec_container_kind":"elasticsearch","ec_container_group":"252e3238734343dbab69f5b3bb27a6e3","ec_container_name":"instance-0000000001"}
[2018-09-24 14:55:00,471][INFO ][no.found.runner.allocation.elasticsearch.clustertask.ClusterTaskScheduler] [Actor[akka://default/user/$b/allocations/elasticsearch-252e3238734343dbab69f5b3bb27a6e3-instance-0000000001-2/scheduler#-1342683483]] Closing leader latch {"ec_container_kind":"elasticsearch","ec_container_group":"252e3238734343dbab69f5b3bb27a6e3","ec_container_name":"instance-0000000001"}
[2018-09-24 14:55:04,439][WARN ][no.found.runner.managers.XFSQuotaWatcher] Command [[sudo, -n, xfs_quota, -x, -c, report -p -n -N]] returned status code [0]] with output: [E: XFS_GETQUOTA: Invalid argument] {}
[2018-09-24 14:55:34,460][WARN ][no.found.runner.managers.XFSQuotaWatcher] Command [[sudo, -n, xfs_quota, -x, -c, report -p -n -N]] returned status code [0]] with output: [E: XFS_GETQUOTA: Invalid argument] {}
[2018-09-24 14:56:04,479][WARN ][no.found.runner.managers.XFSQuotaWatcher] Command [[sudo, -n, xfs_quota, -x, -c, report -p -n -N]] returned status code [0]] with output: [E: XFS_GETQUOTA: Invalid argument] {}
[2018-09-24 14:56:34,500][WARN ][no.found.runner.managers.XFSQuotaWatcher] Command [[sudo, -n, xfs_quota, -x, -c, report -p -n -N]] returned status code [0]] with output: [E: XFS_GETQUOTA: Invalid argument] {}