Start Sidecar First: How To Avoid Snags

Start Sidecar First: How To Avoid Snags A gentle refresher The problem Readiness probe Maybe a startup probe? What about the postStart lifecycle hook? Liveness probe Findings summary From the Kubernetes Multicontainer Pods: An Overview blog post you know what their job is, what are the main architectural patterns, and how they are implemented in Kubernetes. The main thing I’ll cover in this article is how to ensure that your sidecar containers start before the main app. It’s more complicated than you might think! I'd just like to remind readers that the v1.29.0 release of Kubernetes added native support for sidecar containers , which can now be defined within the. spec. initContainers field, but with restartPolicy: Always. You can see that illustrated in the following example Pod manifest snippet:. spec. initContainers restartPolicy: Always initContainers : - name : logshipper image : alpine:latest restartPolicy : Always # this is what makes it a sidecar container command : [ 'sh' , '-c' , 'tail -F /opt/logs. txt' ] volumeMounts : - name : data mountPath : /opt initContainers : - name : logshipper image : alpine:latest restartPolicy : Always # this is what makes it a sidecar container command : [ 'sh' , '-c' , 'tail -F /opt/logs. txt' ] volumeMounts : - name : data mountPath : /opt What are the specifics of defining sidecars with a. spec. initContainers block, rather than as a legacy multi-container pod with multiple.