Feat add startup error when running in kube system #1031
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To avoid any accedential security issues, we block running anything in the kube-system namespace. We already have this explicitly blocked in the rest of the code that deals with namespaces and it causes hard to debug errors for users that try to deploy to the kube-system namespace. This adds an explicit check so that this mis-configuration is easier to detect and debug for end users. Signed-off-by: Lucas Roesler <roesler.lucas@gmail.com>
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| @@ -98,6 +98,12 @@ func main() { | |||
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| config.Fprint(verbose) | |||
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| // use kubeclient to check the current namespace | |||
| namespace, _ := k8s.CurrentNamespace() | |||
| if namespace == "kube-system" { | |||
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This isn't quite the error we were running into.
You probably can run the openfaas core components in the kube-system namespace.
It was that you can't deploy functions there.
So we already have validation in the deployment handlers, but we could do better by checking the functionNamespace variable (if set), and exiting upon startup
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i thought this was part of the suggestion #1022 (comment)
but i see that what we also need to do is provide a meaningful api error as well
| // This implementation is based on the clientcmd.inClusterClientConfig.Namespace method. | ||
| // This is not exported and not accessible via other methods, so we have to copy it. | ||
| func CurrentNamespace() (namespace string, found bool) { | ||
| if ns := os.Getenv("POD_NAMESPACE"); ns != "" { |
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That is a pretty nice trick. TIL
Although please see my other *comment (typo)
Description
To avoid any accedential security issues, we block running anything in
the kube-system namespace. We already have this explicitly blocked in
the rest of the code that deals with namespaces and it causes hard to
debug errors for users that try to deploy to the kube-system namespace.
This adds an explicit check so that this misconfiguration is easier to
detect and debug for end users.
Motivation and Context
Part of a comment on #1022
How Has This Been Tested?
Types of changes
Checklist:
git commit -s