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Ensure that long CNI labels are short enough#351

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wavesoft wants to merge 3 commits intoapache:masterfrom
wavesoft:ic/D2IQ-62219-shorten-long-cni-labels
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Ensure that long CNI labels are short enough#351
wavesoft wants to merge 3 commits intoapache:masterfrom
wavesoft:ic/D2IQ-62219-shorten-long-cni-labels

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@wavesoft wavesoft commented Mar 6, 2020

Apparently this is an implicit limitation on the maximum length of network labels, enforced by the k8s apimachinery library that various CNI plugins use for their API abstraction.

The maximum allowed length is 63 characters. Therefore, in order for us to be able to maximize the amount of information preserved, I am proposing the following solution for long labels:

MD5(<label>)[0:7] + "~" + <label>[sizeof(<label>)-53:]

For example:

/teams/backend-services/database-service/deployments/development/tag-1.12-dev

Becomes:

df1d656~database-service/deployments/development/tag-1.12-dev

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