当存储和计算分离之后,给容器挂载的硬盘一般是块设备,但这个块设备可能是在其他主机上,使用iscsi协议来读写。
最近遇到一个问题,当iscsi的对应target出问题之后,容器中写盘出现io error,
[1808657.505206] blk_update_request: critical medium error, dev sdh, sector 4456448
[1808657.505695] Buffer I/O error on dev sdh, logical block 557056, lost sync page write
[1808657.506178] JBD2: Error -5 detected when updating journal superblock for sdh-8.
[1808657.506657] Aborting journal on device sdh-8.
[1808657.508173] blk_update_request: critical medium error, dev sdh, sector 4456448
[1808657.508657] Buffer I/O error on dev sdh, logical block 557056, lost sync page write
[1808657.509152] JBD2: Error -5 detected when updating journal superblock for sdh-8.
[1808657.510929] blk_update_request: critical medium error, dev sdh, sector 0
[1808657.511396] Buffer I/O error on dev sdh, logical block 0, lost sync page write
[1808657.511875] EXT4-fs error (device sdh): ext4_put_super:800: Couldn't clean up the journal
[1808657.512373] EXT4-fs (sdh): Remounting filesystem read-only
[1808657.512869] EXT4-fs (sdh): previous I/O error to superblock detected
[1808657.514869] blk_update_request: critical medium error, dev sdh, sector 0
[1808657.515402] Buffer I/O error on dev sdh, logical block 0, lost sync page write
[1808657.516635] VFS: Dirty inode writeback failed for block device sdh (err=-5).
然后查看对应的状态即可。
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