For now, there is no way to signal within a pod.  We'd like to get to
shared PID namespace, but there's some work to do still

On Wed, Dec 21, 2016 at 2:09 AM, Paul Ingles <p...@oobaloo.co.uk> wrote:
> Hi all,
>
> We run a lot of infrastructure in AWS, make heavy use of RDS and rely on
> both credentials and security groups to secure access. I'm in the process of
> building some proof-of-concept stuff to see how it could work on Kubernetes
> instead and am trying to find a good way of using short-lived/per-pod
> database credentials.
>
> One idea would be to run a sidecar container in a pod which is responsible
> for retrieving and updating credentials, writing them to a file in a volume
> shared with the main app containers in the pod. However, if these
> credentials change it would be useful to signal to the other containers
> they'll need to reload/restart.
>
> Is there anyway to achieve this currently? Or would it rely on having the
> app containers watching the directories/files and killing themselves if they
> change?
>
> Thanks in advance,
> Paul
>
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