Kubernetes Sidecar support

[vpatil-tibco]

Context
Sidecar is supported oob starting Kubernetes 1.18.x. Customer has requested support. Their requirement is to mark container dependencies and leverage sidecar lifecycle pattern to achieve that.

Alternatives
This can be done today by manually add/modifying existing yaml configurations.

Has the feature been requested before?
https://jira.tibco.com/browse/BE-29690

If the feature request is approved, would you be willing to submit a PR?
Yes

[rameshpolishetti]

So far (i.e till Kubernetes v1.21) the concept of sidecar containers to Kubernetes not became reality. Refer - https://github.com/kubernetes/enhancements/tree/master/keps/sig-node/753-sidecar-containers#implementation-history

We can consider this when it is made available in the Kubernetes release.