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Stats/Stackdriver: Use resource util to generate MonitoredResource #314

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mayurkale22
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Fixes #130

@@ -158,7 +158,8 @@ async function getProjectId() {
/** Gets instance id from GCP instance metadata. */
async function getInstanceId() {
try {
return await gcpMetadata.instance('id');
const id = await gcpMetadata.instance('id');
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This is numerical ID, need to convert to string before assigning to label value.

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codecov-io commented Jan 30, 2019

Codecov Report

Merging #314 into master will decrease coverage by <.01%.
The diff coverage is n/a.

Impacted file tree graph

@@            Coverage Diff            @@
##           master    #314      +/-   ##
=========================================
- Coverage    94.9%   94.9%   -0.01%     
=========================================
  Files         118     118              
  Lines        8030    8101      +71     
  Branches      717     723       +6     
=========================================
+ Hits         7621    7688      +67     
- Misses        409     413       +4
Impacted Files Coverage Δ
test/nocks.ts 62.06% <0%> (-1.2%) ⬇️
src/stackdriver-monitoring.ts 80% <0%> (-0.22%) ⬇️
test/test-stackdriver-stats-utils.ts 100% <0%> (ø) ⬆️
test/test-detect-resource.ts 100% <0%> (ø) ⬆️
src/resource-utils.ts 92.92% <0%> (+0.07%) ⬆️
test/test-stackdriver-monitoring.ts 95.31% <0%> (+0.07%) ⬆️
src/stackdriver-stats-utils.ts 99.2% <0%> (+0.17%) ⬆️

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LGTM overall, defer to @draffensperger for Node readability approval.

const labels: Labels = {project_id: projectId};
let mappings: Labels = {};
const autoDetectedResource = await resource.detectResource();
switch (autoDetectedResource.type) {
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Optional: if you make a helper function that implements the logic of this switch then you can make an assignment like const [type, mappings] = getTypeAndMappings(autoDetectedResource.type). This would avoid the let initializations.

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Make sense, Done.

@@ -237,6 +287,37 @@ function leftZeroPad(ns: number) {
return `${pad}${str}`;
}

function getGcpResourceLabelsMappings() {
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What's the motivation for having these be functions and not just assign the values to the constants above?

IMO, having the constant right next to its value would make it clearer and more compact, but up to you on this.

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taking a suggestion. 👍

it('should return a k8s MonitoredResource', async () => {
process.env.OC_RESOURCE_TYPE = 'k8s.io/container';
process.env.OC_RESOURCE_LABELS =
'k8s.io/pod/name=pod-xyz-123,k8s.io/container/name=c1,k8s.io/namespace/name=default,cloud.google.com/gce/zone=zone1';
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Optional nit: for long strings like this, I often like to break them up with the + operator to keep the line under 80 chars.

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Done.

@mayurkale22
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@draffensperger thanks for the review, PTAL again once you get time.

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Looks good, thanks!

@mayurkale22 mayurkale22 merged commit 4daea53 into census-instrumentation:master Jan 30, 2019
@mayurkale22 mayurkale22 deleted the inject_resource_stackdriver branch January 30, 2019 20:00
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5 participants