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When configuring RBAC permissions we might want to make sure we are configuring them correctly by checking what an user (or ServiceAccount) can do. We can use kubectl auth can-i for this.
29/11/2022
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A Pod can fail to run with the following error:
standard_init_linux.go:178: exec user process caused "exec format error"
24/11/2022
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To prevent OPA Gatekeeper to apply rules to some namespaces we can add exclusions at the rule level but this can be very inconvenient since we would need to add it to every single rule. A change on these exclusion list can be a pain as well.
We can configure the ValidatingWebhookConfiguration to restrict it globally to namespaces that have a some label.
23/11/2022
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To be able to test permissions it can be convenient to have our own user being able to impersonate other users (and ServiceAccounts as well). To do we we'll have to use the impersonate verb as follows:
- apiGroups: [""]
resources: ["users", "groups", "serviceaccounts"]
verbs: ["impersonate"]
22/11/2022
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Let's face it, manually define a openAPIV3Schema definition is no easy task, so why not automating it? We can use this online CRD generator to be able to create it's definition from one sample object
21/11/2022
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