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Merge pull request #63176 from NetApp/bug/59946
Automatic merge from submit-queue (batch tested with PRs 64844, 63176). 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 discovery/deletion of iscsi block devices

This PR modifies the iSCSI attach/detatch codepaths in the following
ways:
1) After unmounting a filesystem on an iSCSI block device, always
flush the multipath device mapper entry (if it exists) and delete
all block devices so the kernel forgets about them.
2) When attaching an iSCSI block device, instead of blindly
attempting to scan for the new LUN, first determine if the target
is already logged into, and if not, do the login first. Once every
portal is logged into, the scan is done.
3) Scans are now done for specific devices, instead of the whole
bus. This avoids discovering LUNs that kubelet has no interest in.
4) Additions to the underlying utility interfaces, with new tests
for the new functionality.
5) Some existing code was shifted up or down, to make the new logic
work.
6) A typo in an existing exec call on the attach path was fixed.

Fixes #59946

```release-note
When attaching iSCSI volumes, kubelet now scans only the specific
LUNs being attached, and also deletes them after detaching. This avoids
dangling references to LUNs that no longer exist, which used to be the
cause of random I/O errors/timeouts in kernel logs, slowdowns during
block-device related operations, and very rare cases of data corruption.
```
2018-07-25 16:19:01 -07:00
.github housekeeping: improved language used in ISSUE_TEMPLATE.md 2018-06-05 20:14:27 +10:00
api dry-run: Run generated commands 2018-07-23 14:07:19 -07:00
build Merge pull request #66463 from m1kola/docs_how_to_build_specific_binary 2018-07-20 17:21:43 -07:00
cluster Merge pull request #65242 from brandondr96/workbranch 2018-07-23 12:32:17 -07:00
cmd Merge pull request #66499 from rosti/kubedns-images 2018-07-24 14:00:01 -07:00
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Godeps Update Godeps after removing influx tests 2018-07-19 21:12:11 -04:00
hack Merge pull request #65242 from brandondr96/workbranch 2018-07-23 12:32:17 -07:00
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pkg Merge pull request #63176 from NetApp/bug/59946 2018-07-25 16:19:01 -07:00
plugin Merge pull request #65572 from yue9944882/fixes-admission-operation-mismatch-for-create-on-update 2018-07-19 10:42:54 -07:00
staging Merge pull request #64681 from CaoShuFeng/webhook_validating_test_case 2018-07-24 16:28:08 -07:00
test Merge pull request #66585 from dims/avoid-sed-bundled-with-darwin 2018-07-25 12:09:42 -07:00
third_party Update to gazelle 0.12.0 and run hack/update-bazel.sh 2018-06-22 16:22:18 -07:00
translations Merge pull request #64773 from MasayaAoyama/add-port-foward-examples 2018-06-20 14:21:14 -07:00
vendor Update Godeps after removing influx tests 2018-07-19 21:12:11 -04:00
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CHANGELOG-1.4.md Typo fix: toto -> to 2018-06-12 23:12:39 +08:00
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