由于卷已满、Trident配置的LUN将脱机、并且文件系统将变为"仅读"

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适用场景

三项功能
SAN

问题描述

Linux 报告严重空间分配错误：

LINUX kernel: blk_update_request: critical space allocation error, dev xxx

PVC安装处于只读状态：

/dev/mapper/3600a098038314474443f5339496b724c on /var/lib/kubelet/pods/07fa7645-1294-44b4-bd61-98f5120a8e6b/volumes/kubernetes.io~csi/pvc-18bc95d2-c6e1-4918-922f-f4ca6c0c4cf9/mount type ext4 (ro,relatime,seclabel,stripe=16)

尝试写入数据时生成"仅读"文件系统错误：

level=warn ts=<time> caller=grpc_logging.go:76 method=/logproto.Pusher/Push duration=234.509µs msg=gRPC err="create new segment file: open <filepath>: read-only file system"

Data ONTAP会发送一条警报、指出Trident卷(ONTAP后端)已满

[wafl_exempt13: wafl.vol.full:alert]: Insufficient space on volume c1_san_ssd_dc1_pvc_19a8fa1a_b8f1_4cd9_9fb8_xxxx@vserver:0b2a7d0a-0441-11ee-a219-xxxxxxxxxxx to perform operation. 72.0KB was requested but only 8.00KB was available.

卷和LUN由Trident根据以下规则自动提供：

ONTAP SAN配置选项和示例

总卷大小=[(PVC请求的大小)/(1 -(snapshotReserve百分比)/100)]* 1.1