Since https://github.com/brancz/kubernetes-grafana/pull/115, upstream
grafana contains a non-empty config. Generate the grafana-config secret
unconditionally even if no user config is passed.

Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

Reduce threshold of NodeFilesystemSpaceFillingUp warning alert to 20% space available, instead of 40% (default).

This will align the threshold according to default kubelet GC values
below[1],

"imageMinimumGCAge": "2m0s",
"imageGCHighThresholdPercent": 85,
"imageGCLowThresholdPercent": 80,

[1] https://kubernetes.io/docs/reference/config-api/kubelet-config.v1beta1/



Signed-off-by: Arunprasad Rajkumar <arajkuma@redhat.com>

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Signed-off-by: paulfantom <pawel@krupa.net.pl>

Signed-off-by: Maxime Brunet <maxime.brunet@paytm.com>

Signed-off-by: Manuel Rüger <manuel@rueg.eu>

Signed-off-by: paulfantom <pawel@krupa.net.pl>

jsonnet: Drop cAdvisor metrics with no (pod, namespace) labels while preserving ability to monitor system services resource usage

The following provides a description and cardinality estimation based on the tests in a local cluster:

container_blkio_device_usage_total - useful for containers, but not for system services (nodes*disks*services*operations*2)
container_fs_.*                    - add filesystem read/write data (nodes*disks*services*4)
container_file_descriptors         - file descriptors limits and global numbers are exposed via (nodes*services)
container_threads_max              - max number of threads in cgroup. Usually for system services it is not limited (nodes*services)
container_threads                  - used threads in cgroup. Usually not important for system services (nodes*services)
container_sockets                  - used sockets in cgroup. Usually not important for system services (nodes*services)
container_start_time_seconds       - container start. Possibly not needed for system services (nodes*services)
container_last_seen                - Not needed as system services are always running (nodes*services)
container_spec_.*                  - Everything related to cgroup specification and thus static data (nodes*services*5)

Signed-off-by: paulfantom <pawel@krupa.net.pl>

From https://github.com/kubernetes-monitoring/kubernetes-mixin/commit/b710a868a95621aa93e0b661954f63f4db82aaea

Signed-off-by: ben.ye <ben.ye@bytedance.com>

Signed-off-by: ben.ye <ben.ye@bytedance.com>

Signed-off-by: ben.ye <ben.ye@bytedance.com>

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

Previously, prometheus-adapter configuration wasn't taking into account
the scrape interval of kubelet, node-exporter and windows-exporter
leading to getting non fresh results, and even negative results from the
CPU queries when the irate() function was extrapolating data.
To fix that, we want to set the interval used in the irate() function in
the CPU queries to 4x scrape interval in order to extrapolate data
between the last two scrapes. This will improve the freshness of the cpu
usage exposed and prevent incorrect extrapolations.

Signed-off-by: Damien Grisonnet <dgrisonn@redhat.com>

With OVN, the container veth network interface names that used to start
with `veth` has now changed to `<rand-hex>{15}@if<number>`(see Related
Links below).

This patch adapts to the new change introduced in ovn and ignores the network
interfaces that match `[a-z0-9]{15}@if\d+` in addition to those starting
with `veth`

Related Links:
  - https://github.com/openshift/ovn-kubernetes/blob/master/go-controller/vendor/github.com/containernetworking/plugins/pkg/ip/link_linux.go#L107
  - https://github.com/openshift/ovn-kubernetes/blob/master/go-controller/pkg/cni/helper_linux.go#L148



Signed-off-by: Sunil Thaha <sthaha@redhat.com>