CEPH - health HEALTH_WARN crush map has legacy tunables (require bobtail, min is firefly)

當用以下cmd查詢ceph的健康狀態時。
$ ceph -s
cluster 6462f5bb-f440-445c-a5ff-e77a7ca38ed6

health HEALTH_WARN
crush map has legacy tunables (require bobtail, min is firefly)
monmap e1: 1 mons at {ceph-mon=192.168.100.2:6789/0}

election epoch 1, quorum 0 ceph-mon
osdmap e79: 3 osds: 3 up, 3 in
pgmap v172285: 1080 pgs, 15 pools, 43160 kB data, 350 objects 280 MB used, 8901 MB / 9182 MB avail 1080 active+clean

# 可以嘗試下列指令，恩為可能無法map device，更動過crush演算法。

$ ceph osd crush tunables firefly

$ ceph osd crush tunables default

$ ceph osd crush tunables optimal

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