On the multi NUMA node environment, kernel splits hugepages allocated under
/sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages file equally between NUMA nodes.
That makes it harder to predict where several pods will start because the number
of hugepages on each NUMA node will depend on the amount of NUMA nodes under the environment.
The memory manager test will allocate hugepages on the specific NUMA node to make
the test more predictable on the multi NUMA nodes environment.
Signed-off-by: Artyom Lukianov <alukiano@redhat.com>
Each e2e test knows it wants to restart a running kubelet or a
non-running kubelet. The vast majority of times, we want to
restart a running kubelet (e.g. to change config or to check
some properties hold across kubelet crashes/restarts), but sometimes
we stop the kubelet, do some actions and only then restart.
To accomodate both use cases, we just expose the `running` boolean
flag to the e2e tests.
Having the `restartKubelet` explicitly restarting a running kubelet
helps us to trobuleshoot e2e failures on which the kubelet
was supposed to be running, while it was not; attempting a restart
in such cases only murkied the waters further, making the
troubleshooting and the eventual fix harder.
In the happy path, no expected change in behaviour.
Signed-off-by: Francesco Romani <fromani@redhat.com>
- verify memory manager data returned by `GetAllocatableResources`
- verify pod container memory manager data
Signed-off-by: Artyom Lukianov <alukiano@redhat.com>
With the memory manager static policy:
- start multiple guaranteed pods and verify that pods succeeded to start
- start workload pod on each NUMA node to load the memory and start the
pod that requested more memory than each NUMA node have, the pod should fail
to start with the admission error, because no single NUMA node has enough
memory to start the pod and also each NUMA node already used for single
NUMA node allocation
The test requires at least two NUMA nodes
Signed-off-by: Artyom Lukianov <alukiano@redhat.com>
Provides basic tests e2e to verify that pod succeeds
to start with MemoryManager enabled.
Verifies both MemoryManager policies and when the node has
multiple NUMA nodes it will verify the memory pinning.
Signed-off-by: Artyom Lukianov <alukiano@redhat.com>
