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OCPVE-616: fix: add conditions to error on missing lv in case VG is present but thin-pool is not #386

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jakobmoellerdev
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This adds more failure conditions where the LV could be corrupt and the LVMCluster will now go into degraded state.

Specifically three conditions are created:

  1. If the lvs report of LVM is empty
  2. If the lvs report of LVM is not empty but has no part for any LV
  3. If the lvs report of LVM is not empty but only contains entries for LVs that are not the thin-pool we created.

For all three cases, previously the LVMCluster would remain in "Ready", now it will be "Degraded" instead

@openshift-ci-robot openshift-ci-robot added the jira/valid-reference Indicates that this PR references a valid Jira ticket of any type. label Aug 17, 2023
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openshift-ci-robot commented Aug 17, 2023

@jakobmoellerdev: This pull request references OCPVE-616 which is a valid jira issue.

In response to this:

This adds more failure conditions where the LV could be corrupt and the LVMCluster will now go into degraded state.

Specifically three conditions are created:

  1. If the lvs report of LVM is empty
  2. If the lvs report of LVM is not empty but has no part for any LV
  3. If the lvs report of LVM is not empty but only contains entries for LVs that are not the thin-pool we created.

For all three cases, previously the LVMCluster would remain in "Ready", now it will be "Degraded" instead

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

@openshift-ci openshift-ci bot requested review from jeff-roche and qJkee August 17, 2023 08:00
@openshift-ci openshift-ci bot added the size/M Denotes a PR that changes 30-99 lines, ignoring generated files. label Aug 17, 2023
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codecov-commenter commented Aug 17, 2023

Codecov Report

Merging #386 (e107820) into main (a962b90) will increase coverage by 40.82%.
Report is 26 commits behind head on main.
The diff coverage is 67.34%.

Additional details and impacted files

Impacted file tree graph

@@             Coverage Diff             @@
##             main     #386       +/-   ##
===========================================
+ Coverage   16.59%   57.42%   +40.82%     
===========================================
  Files          24       26        +2     
  Lines        2061     2290      +229     
===========================================
+ Hits          342     1315      +973     
+ Misses       1693      884      -809     
- Partials       26       91       +65     
Files Changed Coverage Δ
controllers/lvmcluster_controller_watches.go 90.32% <ø> (+90.32%) ⬆️
pkg/vgmanager/lvm.go 52.03% <ø> (+4.06%) ⬆️
controllers/topolvm_snapshotclass.go 61.22% <14.28%> (+61.22%) ⬆️
pkg/vgmanager/vgmanager_controller.go 10.40% <48.43%> (+10.40%) ⬆️
controllers/lvmcluster_controller.go 58.63% <50.00%> (+58.63%) ⬆️
pkg/cluster/leaderelection.go 66.66% <66.66%> (ø)
pkg/cluster/sno.go 72.72% <72.72%> (ø)
pkg/vgmanager/devices.go 80.98% <84.21%> (+6.78%) ⬆️
pkg/vgmanager/lv_attr.go 92.59% <92.59%> (ø)
controllers/topolvm_controller.go 94.14% <100.00%> (+94.14%) ⬆️

... and 8 files with indirect coverage changes

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/test lvm-operator-e2e-aws

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Just this 2 nits, otherwise looks good

@@ -382,12 +382,22 @@ func (r *VGReconciler) validateLVs(volumeGroup *lvmv1alpha1.LVMVolumeGroup) erro
if err != nil {
return fmt.Errorf("could not get logical volumes found inside volume group, volume group content is degraded or corrupt: %w", err)
}
if len(resp.Report) < 1 {
return fmt.Errorf("LV report was empty, meaning that the thin-pool LV is no longer found, " +
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Please use errors.New() and "`" symbol to avoid concatenation

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I don't understand why its bad to have concatenation? We never used "`" in the entire Repo and only have 3 cases of errors.New()? Could you explain why thats better?

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Nits inherently don't block merging.

That said, I'm likely to blame for setting a precedent on this type of suggestion. I'm generally quite against concatentation as there's rarely a good case to use it. Happy to explain further but that's probably best done outside of a PR 😄

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@jakobmoellerdev

  1. Why do we need to concatenate strings when they are not dynamic? Both of them are well known and written by us, so this is a useless job for compiler/runtime

  2. Errorf scans the string for formatting chars like %s and etc. When we know that there is no formatting, why do extra work?
    This is Errorf Implementation
    And this is for errors.New() implementation

Most of the places which are using Errorf actually have formatting symbols


for _, report := range resp.Report {
if len(report.Lv) < 1 {
return fmt.Errorf("no LV was found in the report, meaning that the thin-pool LV is no longer found, " +
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same

@suleymanakbas91
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/lgtm
/approve

@openshift-ci openshift-ci bot added the lgtm Indicates that a PR is ready to be merged. label Aug 21, 2023
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openshift-ci bot commented Aug 21, 2023

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jakobmoellerdev, suleymanakbas91

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@openshift-ci openshift-ci bot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Aug 21, 2023
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openshift-ci bot commented Aug 21, 2023

@jakobmoellerdev: all tests passed!

Full PR test history. Your PR dashboard.

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@openshift-merge-robot openshift-merge-robot merged commit 04a7434 into openshift:main Aug 21, 2023
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7 participants