When the pods are transitioning there are several
cases where containers might not be in valid state.
There were several cases where the stats where
failing hard but we should just continue on as
they are transient and will be picked up again
when kubelet queries for the stats again.
Signed-off-by: James Sturtevant <jstur@microsoft.com>
Signed-off-by: Mark Rossetti <marosset@microsoft.com>
When a container is just created, exited state the container will not have stats. A common case for this in k8s is the init containers for a pod. The will be present in the listed containers but will not have a running task and there for no stats.
Signed-off-by: James Sturtevant <jstur@microsoft.com>
The initial PR had a check for nil metrics but after some refactoring in the PR the test case that was suppose cover HPC was missing a scenario where the metric was not nil but didn't contain any metrics. This fixes that case and adds a testcase to cover it.
Signed-off-by: James Sturtevant <jstur@microsoft.com>
To further some ongoing work in containerd to make as much code as possible
able to be used on any platform (to handle runtimes that can virtualize/emulate
a variety of different OSes), this change makes stats able to be handled on
any of the supported stat types (just linux and windows). To accomplish this,
we use the platform the sandbox returns from its `Platform` rpc to decide
what format the containers in a given sandbox are returning metrics in, then
we can typecast/marshal accordingly.
Signed-off-by: Danny Canter <danny@dcantah.dev>
