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Hi, I have a ceph cluster as the nova backend storage, and I enabled the cache tier with readonly cache-mode for the nova_pool, now the nova instance cannot boot after remove the nova_pool cache tier, The instance show the error is “boot failed:not a bootable disk” I used the below command to remove the cache tier which refer to the ceph document ceph osd tier cache-mode cache_pool none ceph osd tier remove nova_pool cache_pool when I perform the troubleshooting, I found that some images existed in nova_cache but not found in nova_pool, so it seems that the cache pool(nove_cache) work with writeback mode before, why ? I confirmed that I set it with readonly mode before,what is wrong ? And if there is any way can fix the instance boot issue ? |
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