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src/kubelet/metric: improvements to GetMetricsData method
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It will now return a pointer to a summary, which should save some memory
copying and is more standard approach for functions, which may return
error in Go.

Additionally, to make use of using structure pointer,
GroupStatsSummary() method is also adopted to take a pointer of the
summary.

There are also improved error messages in GetMetricsData(), which should
be more helpful while debugging.

Signed-off-by: Mateusz Gozdek <mgozdek@microsoft.com>
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@invidian
invidian committed Jul 16, 2021
1 parent 55afc49 commit 03c208f
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Showing 2 changed files with 46 additions and 37 deletions.
24 changes: 15 additions & 9 deletions src/kubelet/metric/metric.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -18,27 +18,29 @@ import (
const StatsSummaryPath = "/stats/summary"

// GetMetricsData calls kubelet /stats/summary endpoint and returns unmarshalled response
func GetMetricsData(c client.HTTPClient) (v1.Summary, error) {
func GetMetricsData(c client.HTTPClient) (*v1.Summary, error) {
resp, err := c.Do(http.MethodGet, StatsSummaryPath)
if err != nil {
return v1.Summary{}, err
return nil, fmt.Errorf("performing GET request to kubelet endpoint %q: %w", StatsSummaryPath, err)
}
defer resp.Body.Close() // nolint: errcheck
if resp.StatusCode != http.StatusOK {
return v1.Summary{}, fmt.Errorf("error calling kubelet endpoint. Got status code: %d", resp.StatusCode)
}

body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return v1.Summary{}, fmt.Errorf("error reading the response body of kubelet endpoint. Got error: %v", err.Error())
return nil, fmt.Errorf("reading the response body of kubelet endpoint (response code %d): %w", resp.StatusCode, err)
}

if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("received non-OK response code from kubelet: %d. Response body: %v", resp.StatusCode, body)
}

summary := &v1.Summary{}

if err := json.Unmarshal(body, summary); err != nil {
return v1.Summary{}, fmt.Errorf("error unmarshaling the response body. Got error: %v", err.Error())
return nil, fmt.Errorf("unmarshaling the response body into kubelet stats Summary: %w", err)
}

return *summary, nil
return summary, nil
}

func fetchNodeStats(n v1.NodeStats) (definition.RawMetrics, string, error) {
Expand Down Expand Up @@ -189,7 +191,11 @@ func fetchVolumeStats(v v1.VolumeStats) (definition.RawMetrics, error) {
}

// GroupStatsSummary groups specific data for pods, containers and node
func GroupStatsSummary(statsSummary v1.Summary) (definition.RawGroups, []error) {
func GroupStatsSummary(statsSummary *v1.Summary) (definition.RawGroups, []error) {
if statsSummary == nil {
return nil, []error{fmt.Errorf("got nil stats summary")}
}

var errs []error
var rawEntityID string
g := definition.RawGroups{
Expand Down
59 changes: 31 additions & 28 deletions src/kubelet/metric/metric_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,6 @@ package metric

import (
"encoding/json"
"fmt"
"io/ioutil"
"testing"

Expand All @@ -13,20 +12,24 @@ import (
"github.com/newrelic/nri-kubernetes/v2/src/definition"
)

var responseContainerWithTheSameName = `{ "pods": [ { "podRef": { "name": "newrelic-infra-monitoring-pjp0v", "namespace": "kube-system", "uid": "b5a9c98f-d34f-11e7-95fe-62d16fb0cc7f" }, "startTime": "2017-11-30T09:12:37Z", "containers": [ { "name": "kube-state-metrics", "startTime": "2017-11-30T09:12:51Z", "cpu": { "time": "2017-11-30T14:48:10Z", "usageNanoCores": 184087, "usageCoreNanoSeconds": 4284675040 }, "memory": { "time": "2017-11-30T14:48:10Z", "usageBytes": 22552576, "workingSetBytes": 15196160, "rssBytes": 7352320, "pageFaults": 4683, "majorPageFaults": 152 }, "rootfs": { "time": "2017-11-30T14:48:10Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 35000320, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 24 }, "logs": { "time": "2017-11-30T14:48:10Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 20480, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 157225 }, "userDefinedMetrics": null }, { "name": "newrelic-infra", "startTime": "2017-11-30T09:12:44Z", "cpu": { "time": "2017-11-30T14:48:12Z", "usageNanoCores": 13046199, "usageCoreNanoSeconds": 303855795298 }, "memory": { "time": "2017-11-30T14:48:12Z", "usageBytes": 243638272, "workingSetBytes": 38313984, "rssBytes": 15785984, "pageFaults": 10304448, "majorPageFaults": 217 }, "rootfs": { "time": "2017-11-30T14:48:12Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 1305837568, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 52 }, "logs": { "time": "2017-11-30T14:48:12Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 657747968, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 157225 }, "userDefinedMetrics": null } ], "network": { "time": "2017-11-30T14:48:12Z", "rxBytes": 15741653, "rxErrors": 0, "txBytes": 19551073, "txErrors": 0 }, "volume": [ { "time": "2017-11-30T09:13:29Z", "availableBytes": 1048637440, "capacityBytes": 1048649728, "usedBytes": 12288, "inodesFree": 256009, "inodes": 256018, "inodesUsed": 9, "name": "default-token-7cg8m" } ] }, { "podRef": { "name": "kube-dns-910330662-pflkj", "namespace": "kube-system", "uid": "a6f2130b-a21e-11e7-8db6-62d16fb0cc7f" }, "startTime": "2017-11-30T09:12:36Z", "containers": [ { "name": "kube-state-metrics", "startTime": "2017-11-30T09:12:51Z", "cpu": { "time": "2017-11-30T14:48:10Z", "usageNanoCores": 184087, "usageCoreNanoSeconds": 4284675040 }, "memory": { "time": "2017-11-30T14:48:10Z", "usageBytes": 22552576, "workingSetBytes": 15196160, "rssBytes": 7352320, "pageFaults": 4683, "majorPageFaults": 152 }, "rootfs": { "time": "2017-11-30T14:48:10Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 35000320, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 24 }, "logs": { "time": "2017-11-30T14:48:10Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 20480, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 157225 }, "userDefinedMetrics": null }, { "name": "dnsmasq", "startTime": "2017-11-30T09:12:43Z", "cpu": { "time": "2017-11-30T14:48:07Z", "usageNanoCores": 208374, "usageCoreNanoSeconds": 3653471654 }, "memory": { "time": "2017-11-30T14:48:07Z", "usageBytes": 19812352, "workingSetBytes": 12828672, "rssBytes": 5201920, "pageFaults": 3376, "majorPageFaults": 139 }, "rootfs": { "time": "2017-11-30T14:48:07Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 42041344, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 20 }, "logs": { "time": "2017-11-30T14:48:07Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 20480, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 157225 }, "userDefinedMetrics": null } ], "network": { "time": "2017-11-30T14:48:07Z", "rxBytes": 14447980, "rxErrors": 0, "txBytes": 15557657, "txErrors": 0 }, "volume": [ { "time": "2017-11-30T09:13:29Z", "availableBytes": 1048637440, "capacityBytes": 1048649728, "usedBytes": 12288, "inodesFree": 256009, "inodes": 256018, "inodesUsed": 9, "name": "default-token-7cg8m" } ] } ] }`
var responseMissingContainerName = `{ "pods": [ { "podRef": { "name": "newrelic-infra-monitoring-pjp0v", "namespace": "kube-system", "uid": "b5a9c98f-d34f-11e7-95fe-62d16fb0cc7f" }, "startTime": "2017-11-30T09:12:37Z", "containers": [ { "startTime": "2017-11-30T09:12:51Z", "cpu": { "time": "2017-11-30T14:48:10Z", "usageNanoCores": 184087, "usageCoreNanoSeconds": 4284675040 }, "memory": { "time": "2017-11-30T14:48:10Z", "usageBytes": 22552576, "workingSetBytes": 15196160, "rssBytes": 7352320, "pageFaults": 4683, "majorPageFaults": 152 } } ], "network": { "time": "2017-11-30T14:48:12Z", "rxBytes": 15741653, "txBytes": 52463212, "rxErrors": 0, "txErrors": 0 } } ] }`
var responseMissingPodName = `{ "pods": [ { "podRef": { "namespace": "kube-system", "uid": "b5a9c98f-d34f-11e7-95fe-62d16fb0cc7f" }, "startTime": "2017-11-30T09:12:37Z", "containers": [ { "name": "kube-state-metrics", "startTime": "2017-11-30T09:12:51Z", "cpu": { "time": "2017-11-30T14:48:10Z", "usageNanoCores": 184087, "usageCoreNanoSeconds": 4284675040 }, "memory": { "time": "2017-11-30T14:48:10Z", "usageBytes": 22552576, "workingSetBytes": 15196160, "rssBytes": 7352320, "pageFaults": 4683, "majorPageFaults": 152 } } ], "network": { "time": "2017-11-30T14:48:12Z", "rxBytes": 15741653, "txBytes": 52463212, "rxErrors": 0, "txErrors": 0 } } ] }`
var responseMissingRxBytesForPod = `{ "pods": [ { "podRef": { "name": "newrelic-infra-monitoring-pjp0v", "namespace": "kube-system", "uid": "b5a9c98f-d34f-11e7-95fe-62d16fb0cc7f" }, "startTime": "2017-11-30T09:12:37Z", "containers": [ { "name": "kube-state-metrics", "startTime": "2017-11-30T09:12:51Z", "cpu": { "time": "2017-11-30T14:48:10Z", "usageNanoCores": 184087, "usageCoreNanoSeconds": 4284675040 }, "memory": { "time": "2017-11-30T14:48:10Z", "usageBytes": 22552576, "workingSetBytes": 15196160, "rssBytes": 7352320, "pageFaults": 4683, "majorPageFaults": 152 } } ], "network": { "time": "2017-11-30T14:48:12Z", "txBytes": 52463212, "rxErrors": 0, "txErrors": 0 } } ] }`
var (
responseContainerWithTheSameName = `{ "pods": [ { "podRef": { "name": "newrelic-infra-monitoring-pjp0v", "namespace": "kube-system", "uid": "b5a9c98f-d34f-11e7-95fe-62d16fb0cc7f" }, "startTime": "2017-11-30T09:12:37Z", "containers": [ { "name": "kube-state-metrics", "startTime": "2017-11-30T09:12:51Z", "cpu": { "time": "2017-11-30T14:48:10Z", "usageNanoCores": 184087, "usageCoreNanoSeconds": 4284675040 }, "memory": { "time": "2017-11-30T14:48:10Z", "usageBytes": 22552576, "workingSetBytes": 15196160, "rssBytes": 7352320, "pageFaults": 4683, "majorPageFaults": 152 }, "rootfs": { "time": "2017-11-30T14:48:10Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 35000320, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 24 }, "logs": { "time": "2017-11-30T14:48:10Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 20480, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 157225 }, "userDefinedMetrics": null }, { "name": "newrelic-infra", "startTime": "2017-11-30T09:12:44Z", "cpu": { "time": "2017-11-30T14:48:12Z", "usageNanoCores": 13046199, "usageCoreNanoSeconds": 303855795298 }, "memory": { "time": "2017-11-30T14:48:12Z", "usageBytes": 243638272, "workingSetBytes": 38313984, "rssBytes": 15785984, "pageFaults": 10304448, "majorPageFaults": 217 }, "rootfs": { "time": "2017-11-30T14:48:12Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 1305837568, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 52 }, "logs": { "time": "2017-11-30T14:48:12Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 657747968, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 157225 }, "userDefinedMetrics": null } ], "network": { "time": "2017-11-30T14:48:12Z", "rxBytes": 15741653, "rxErrors": 0, "txBytes": 19551073, "txErrors": 0 }, "volume": [ { "time": "2017-11-30T09:13:29Z", "availableBytes": 1048637440, "capacityBytes": 1048649728, "usedBytes": 12288, "inodesFree": 256009, "inodes": 256018, "inodesUsed": 9, "name": "default-token-7cg8m" } ] }, { "podRef": { "name": "kube-dns-910330662-pflkj", "namespace": "kube-system", "uid": "a6f2130b-a21e-11e7-8db6-62d16fb0cc7f" }, "startTime": "2017-11-30T09:12:36Z", "containers": [ { "name": "kube-state-metrics", "startTime": "2017-11-30T09:12:51Z", "cpu": { "time": "2017-11-30T14:48:10Z", "usageNanoCores": 184087, "usageCoreNanoSeconds": 4284675040 }, "memory": { "time": "2017-11-30T14:48:10Z", "usageBytes": 22552576, "workingSetBytes": 15196160, "rssBytes": 7352320, "pageFaults": 4683, "majorPageFaults": 152 }, "rootfs": { "time": "2017-11-30T14:48:10Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 35000320, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 24 }, "logs": { "time": "2017-11-30T14:48:10Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 20480, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 157225 }, "userDefinedMetrics": null }, { "name": "dnsmasq", "startTime": "2017-11-30T09:12:43Z", "cpu": { "time": "2017-11-30T14:48:07Z", "usageNanoCores": 208374, "usageCoreNanoSeconds": 3653471654 }, "memory": { "time": "2017-11-30T14:48:07Z", "usageBytes": 19812352, "workingSetBytes": 12828672, "rssBytes": 5201920, "pageFaults": 3376, "majorPageFaults": 139 }, "rootfs": { "time": "2017-11-30T14:48:07Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 42041344, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 20 }, "logs": { "time": "2017-11-30T14:48:07Z", "availableBytes": 6911750144, "capacityBytes": 17293533184, "usedBytes": 20480, "inodesFree": 9574871, "inodes": 9732096, "inodesUsed": 157225 }, "userDefinedMetrics": null } ], "network": { "time": "2017-11-30T14:48:07Z", "rxBytes": 14447980, "rxErrors": 0, "txBytes": 15557657, "txErrors": 0 }, "volume": [ { "time": "2017-11-30T09:13:29Z", "availableBytes": 1048637440, "capacityBytes": 1048649728, "usedBytes": 12288, "inodesFree": 256009, "inodes": 256018, "inodesUsed": 9, "name": "default-token-7cg8m" } ] } ] }`
responseMissingContainerName = `{ "pods": [ { "podRef": { "name": "newrelic-infra-monitoring-pjp0v", "namespace": "kube-system", "uid": "b5a9c98f-d34f-11e7-95fe-62d16fb0cc7f" }, "startTime": "2017-11-30T09:12:37Z", "containers": [ { "startTime": "2017-11-30T09:12:51Z", "cpu": { "time": "2017-11-30T14:48:10Z", "usageNanoCores": 184087, "usageCoreNanoSeconds": 4284675040 }, "memory": { "time": "2017-11-30T14:48:10Z", "usageBytes": 22552576, "workingSetBytes": 15196160, "rssBytes": 7352320, "pageFaults": 4683, "majorPageFaults": 152 } } ], "network": { "time": "2017-11-30T14:48:12Z", "rxBytes": 15741653, "txBytes": 52463212, "rxErrors": 0, "txErrors": 0 } } ] }`
responseMissingPodName = `{ "pods": [ { "podRef": { "namespace": "kube-system", "uid": "b5a9c98f-d34f-11e7-95fe-62d16fb0cc7f" }, "startTime": "2017-11-30T09:12:37Z", "containers": [ { "name": "kube-state-metrics", "startTime": "2017-11-30T09:12:51Z", "cpu": { "time": "2017-11-30T14:48:10Z", "usageNanoCores": 184087, "usageCoreNanoSeconds": 4284675040 }, "memory": { "time": "2017-11-30T14:48:10Z", "usageBytes": 22552576, "workingSetBytes": 15196160, "rssBytes": 7352320, "pageFaults": 4683, "majorPageFaults": 152 } } ], "network": { "time": "2017-11-30T14:48:12Z", "rxBytes": 15741653, "txBytes": 52463212, "rxErrors": 0, "txErrors": 0 } } ] }`
responseMissingRxBytesForPod = `{ "pods": [ { "podRef": { "name": "newrelic-infra-monitoring-pjp0v", "namespace": "kube-system", "uid": "b5a9c98f-d34f-11e7-95fe-62d16fb0cc7f" }, "startTime": "2017-11-30T09:12:37Z", "containers": [ { "name": "kube-state-metrics", "startTime": "2017-11-30T09:12:51Z", "cpu": { "time": "2017-11-30T14:48:10Z", "usageNanoCores": 184087, "usageCoreNanoSeconds": 4284675040 }, "memory": { "time": "2017-11-30T14:48:10Z", "usageBytes": 22552576, "workingSetBytes": 15196160, "rssBytes": 7352320, "pageFaults": 4683, "majorPageFaults": 152 } } ], "network": { "time": "2017-11-30T14:48:12Z", "txBytes": 52463212, "rxErrors": 0, "txErrors": 0 } } ] }`
)

var nodeSampleMissingImageFs = `{ "node": { "nodeName": "fooNode", "startTime": "2018-01-22T06:52:15Z", "cpu": { "time": "2018-01-24T16:40:00Z", "usageNanoCores": 64124211, "usageCoreNanoSeconds": 353998913059080 }, "memory": { "time": "2018-01-24T16:40:00Z", "availableBytes": 502603776, "usageBytes": 687067136, "workingSetBytes": 540618752, "rssBytes": 150396928, "pageFaults": 3067606235, "majorPageFaults": 517653 }, "network": { "time": "2018-01-24T16:40:00Z", "rxBytes": 51419684038, "rxErrors": 0, "txBytes": 25630208577, "txErrors": 0, "interfaces": [ { "name": "ens5", "rxBytes": 51419684038, "rxErrors": 0, "txBytes": 25630208577, "txErrors": 0 }, { "name": "ip6tnl0", "rxBytes": 0, "rxErrors": 0, "txBytes": 0, "txErrors": 0 } ] }, "fs": { "time": "2018-01-24T16:40:00Z", "availableBytes": 92795400192, "capacityBytes": 128701009920, "usedBytes": 30305800192, "inodesFree": 32999604, "inodes": 33554432, "inodesUsed": 554828 }, "runtime": { } } }`

func toSummary(response string) (v1.Summary, error) {
var summary = new(v1.Summary)
err := json.Unmarshal([]byte(response), summary)
if err != nil {
return v1.Summary{}, fmt.Errorf("Error unmarshaling the response body. Got error: %v", err.Error())
func toSummary(t *testing.T, response string) *v1.Summary {
t.Helper()

summary := &v1.Summary{}
if err := json.Unmarshal([]byte(response), summary); err != nil {
t.Fatalf("unmarshaling the response body: %v", err)
}
return *summary, nil

return summary
}

func TestGroupStatsSummary_CorrectValue(t *testing.T) {
Expand Down Expand Up @@ -178,8 +181,7 @@ func TestGroupStatsSummary_CorrectValue(t *testing.T) {

responseOkDataSample, err := ioutil.ReadFile("testdata/kubelet_summary_response_ok.json")
require.NoError(t, err)
summary, err := toSummary(string(responseOkDataSample))
assert.NoError(t, err)
summary := toSummary(t, string(responseOkDataSample))

rawData, errs := GroupStatsSummary(summary)
assert.Empty(t, errs)
Expand Down Expand Up @@ -290,8 +292,7 @@ func TestGroupStatsSummary_MissingNodeData_ContainerWithTheSameName(t *testing.T
},
"node": {},
}
summary, err := toSummary(responseContainerWithTheSameName)
assert.NoError(t, err)
summary := toSummary(t, responseContainerWithTheSameName)

rawData, errs := GroupStatsSummary(summary)
assert.EqualError(t, errs[0], "empty node identifier, possible data error in /stats/summary response")
Expand All @@ -315,8 +316,7 @@ func TestGroupStatsSummary_IncompleteStatsSummaryMessage_MissingNodeData_Missing
"node": {},
}

summary, err := toSummary(responseMissingContainerName)
assert.NoError(t, err)
summary := toSummary(t, responseMissingContainerName)

rawData, errs := GroupStatsSummary(summary)
assert.Len(t, errs, 2, "Not expected length of errors")
Expand All @@ -331,8 +331,7 @@ func TestGroupStatsSummary_IncompleteStatsSummaryMessage_MissingNodeData_Missing
"node": {},
}

summary, err := toSummary(responseMissingPodName)
assert.NoError(t, err)
summary := toSummary(t, responseMissingPodName)

rawData, errs := GroupStatsSummary(summary)
assert.Len(t, errs, 2, "Not expected length of errors")
Expand Down Expand Up @@ -369,18 +368,17 @@ func TestGroupStatsSummary_IncompleteStatsSummaryMessage_MissingNodeData_NoRxByt
"node": {},
}

summary, err := toSummary(responseMissingRxBytesForPod)
assert.NoError(t, err)
summary := toSummary(t, responseMissingRxBytesForPod)

rawData, errs := GroupStatsSummary(summary)
assert.Len(t, errs, 1, "Not expected length of errors")
assert.Equal(t, expectedRawData, rawData)
}

func TestGroupStatsSummary_EmptyStatsSummaryMessage(t *testing.T) {
var summary = new(v1.Summary)
summary := &v1.Summary{}

rawData, errs := GroupStatsSummary(*summary)
rawData, errs := GroupStatsSummary(summary)

assert.Len(t, errs, 2, "Not expected length of errors")
assert.Len(t, rawData, 4, "Not expected length of rawData for pods and containers")
Expand All @@ -390,6 +388,13 @@ func TestGroupStatsSummary_EmptyStatsSummaryMessage(t *testing.T) {
assert.Empty(t, rawData["volume"])
}

func Test_GroupStatsSummary_return_error_when_nil_summary_is_given(t *testing.T) {
rawData, errs := GroupStatsSummary(nil)

assert.Len(t, errs, 1)
assert.Nil(t, rawData)
}

func TestAddUint64RawMetric(t *testing.T) {
r := definition.RawMetrics{
"nodeName": "fooNode",
Expand All @@ -400,8 +405,7 @@ func TestAddUint64RawMetric(t *testing.T) {
"foo": uint64(353998913059080),
}

summary, err := toSummary(`{ "node": { "cpu": { "usageCoreNanoSeconds": 353998913059080 } } }`)
assert.NoError(t, err)
summary := toSummary(t, `{ "node": { "cpu": { "usageCoreNanoSeconds": 353998913059080 } } }`)

AddUint64RawMetric(r, "foo", summary.Node.CPU.UsageCoreNanoSeconds)
assert.Equal(t, expected, r)
Expand Down Expand Up @@ -444,10 +448,9 @@ func TestFetchNodeStats_MissingImageFs(t *testing.T) {
"fsInodes": uint64(33554432),
"fsInodesUsed": uint64(554828),
}
s, err := toSummary(nodeSampleMissingImageFs)
assert.NoError(t, err)
summary := toSummary(t, nodeSampleMissingImageFs)

rawData, ID, errs := fetchNodeStats(s.Node)
rawData, ID, errs := fetchNodeStats(summary.Node)
assert.Empty(t, errs)
assert.Equal(t, "fooNode", ID)
assert.Equal(t, expectedRawData, rawData)
Expand Down

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