59ad01f994
Automatic merge from submit-queue (batch tested with PRs 54336, 54470, 54334, 54175). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. fix azure disk mount failure on coreos and some other distros **What this PR does / why we need it**: azure disk mount failure on coreos due to `/dev/disk/azure` not populated on coreos, and also on some other distros. After a long time back and forth discussion, I have decided to fix this issue on k8s side. Customers are leaving azure because of this udev issue, you could read details from #50150 . I have verifed the code works well on current coreos on azure. **Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #50150: azure_dd: managed disks don't pass "FormatAndMount" In coreos on azure and some old distros, one udev rule is not applied, which means `/dev/disk/azure` not populated, while current disk detection code logic relies on `/dev/disk/azure`, so it would lead to azure disk mount failure, for more details, pls refer to #50150 **Special notes for your reviewer**: In v1.6, there is no such issue becuase it's not using /dev/azure/disk to detect the LUN of new disk, so I refer the code logic of v1.6: https://github.com/kubernetes/kubernetes/blob/release-1.6/pkg/volume/azure_dd/vhd_util.go#L59-L66 while from v1.7, it's using /dev/azure/disk, the code logic does not apply to distro which does not have udev rules(/dev/azure/disk), see: https://github.com/kubernetes/kubernetes/blob/release-1.7/pkg/volume/azure_dd/azure_common.go#L231-L236 **Release note**: ``` fix azure disk mount failure on coreos and some other distro due to udev rule not applied ``` /sig azure @rootfs @brendanburns @colemickens @tlyng @karataliu @szarkos |
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Kubernetes
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