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Fixed statefulset PVC's capacity in kubectl description. #47573

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merged 1 commit into from
Jun 21, 2017
Merged

Fixed statefulset PVC's capacity in kubectl description. #47573

merged 1 commit into from
Jun 21, 2017
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k82cn
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@k82cn k82cn commented Jun 15, 2017 •
edited by saad-ali
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What this PR does / why we need it:
We should use object instead of pointer for String().

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #47571

Release note:

Fix VolumeClaims/capacity in "kubectl describe statefulsets" output.

@k8s-ci-robot k8s-ci-robot added the cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. label Jun 15, 2017
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k82cn commented Jun 15, 2017

The output of kubectl:

Volume Claims:
  Name:		www
  StorageClass:	anything
  Labels:	<none>
  Annotations:	volume.beta.kubernetes.io/storage-class=anything
  Capacity:	1Gi
  Access Modes:	[ReadWriteOnce]

@k8s-github-robot k8s-github-robot added size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. release-note Denotes a PR that will be considered when it comes time to generate release notes. labels Jun 15, 2017
@k82cn k82cn changed the title Fixed String() of Quantity. Fixed PVC's capacity in description. Jun 15, 2017
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k82cn commented Jun 15, 2017

/unassign
/assign @pwittrock @adohe

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k82cn commented Jun 15, 2017

/unassign @derekwaynecarr @wojtek-t

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k82cn commented Jun 15, 2017

xref kubernetes/kubectl#33

xiang90
xiang90 reviewed Jun 15, 2017
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pkg/printers/internalversion/describe.go
@@ -1382,7 +1382,7 @@ func describeVolumeClaimTemplates(templates []api.PersistentVolumeClaim, w Prefi
printLabelsMultilineWithIndent(w, " ", "Labels", "\t", pvc.Labels, sets.NewString())
printLabelsMultilineWithIndent(w, " ", "Annotations", "\t", pvc.Annotations, sets.NewString())
if capacity, ok := pvc.Spec.Resources.Requests[api.ResourceStorage]; ok {
w.Write(LEVEL_1, "Capacity:\t%s\n", capacity)
w.Write(LEVEL_1, "Capacity:\t%s\n", capacity.String())
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a better way is to change %s to %v.

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%v will not work :(. Here's the output of %v:

  Capacity:	{{1073741824 0} {<nil>} 1Gi BinarySI}

When we print an object by %s in go, it'll call object's String(); but Quantity.String() is using pointer (for caching string), we have to call it explicitly.

Should be func (q Quantity) String() string not func (q *Quantity) String() string at https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/apimachinery/pkg/api/resource/quantity.go#L608 .

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you are right. probably worth fix the stringer interface thing. it just looks strange to explicitly call x.String()

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Agree. According to the comments, it use (q *Quantity) String() for caching string, not sure the performance impact (e.g. build string every time); prefer to open an issue to trace it :).

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sgtm

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#47585 to trace the discussion.

@k82cn k82cn changed the title Fixed PVC's capacity in description. Fixed statefulset PVC's capacity in kubectl description. Jun 15, 2017
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/lgtm

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Jun 15, 2017
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/approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: k82cn, pwittrock

Associated issue: 47571

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these OWNERS Files:

You can indicate your approval by writing /approve in a comment
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@k8s-github-robot k8s-github-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Jun 15, 2017
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k82cn commented Jun 16, 2017

@pwittrock , should we include this in 1.7?

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I verified this is broken on head. Fix is very low risk. Worth picking up for 1.7. See comment #47571 (comment)

CC @dchen1107 @pwittrock

@saad-ali saad-ali modified the milestone: v1.7 Jun 20, 2017
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Will let @pwittrock add 1.7 milestone

@pwittrock pwittrock added this to the v1.7 milestone Jun 20, 2017
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Automatic merge from submit-queue (batch tested with PRs 45268, 47573, 47632, 47818)

@k8s-github-robot k8s-github-robot merged commit 7f7c29a into kubernetes:master Jun 21, 2017
@k82cn k82cn deleted the k8s_47571 branch June 21, 2017 05:24
@k82cn k82cn mentioned this pull request Jul 24, 2017
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Successfully merging this pull request may close these issues.

kubectl did not print readable message of statefulset PVC's capacity.
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