Bug 1812093 - MCO is using > 4MBps bandswidth according to SDN stats
Summary: MCO is using > 4MBps bandswidth according to SDN stats
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: OpenShift Container Platform
Classification: Red Hat
Component: Machine Config Operator
Version: 4.4
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
: ---
Assignee: Antonio Murdaca
QA Contact: Michael Nguyen
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-03-10 14:10 UTC by Vadim Rutkovsky
Modified: 2020-04-02 18:10 UTC (History)
0 users

Fixed In Version:
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Environment:
Last Closed: 2020-04-02 18:10:08 UTC
Target Upstream Version:


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Description Vadim Rutkovsky 2020-03-10 14:10:01 UTC
Description of problem:
Reproduced in 4.4.0-0.okd-2020-03-10-052608

machine-config-operator is using < 4 MBps according to Kubernetes / Networking / Cluster dashboard in Grafana, although no host-related tasks are in progress.

PromQL query: topk(5, sum(irate(container_network_receive_bytes_total{namespace='openshift-machine-config-operator'}[5m])) by (pod, namespace))

data: 
{namespace="openshift-machine-config-operator",pod="etcd-quorum-guard-6c84498b67-b478g"}	1419293.650793651
{namespace="openshift-machine-config-operator",pod="machine-config-daemon-pkwxr"}	1309700.038358266
{namespace="openshift-machine-config-operator",pod="machine-config-server-tm8t8"}	1122166.6219479474
{namespace="openshift-machine-config-operator",pod="etcd-quorum-guard-6c84498b67-tzq89"}	920098.4322019672
{namespace="openshift-machine-config-operator",pod="machine-config-daemon-rq659"}	900368.253047011

topk(5, sum(irate(container_network_transmit_bytes_total{namespace='openshift-machine-config-operator'}[5m])) by (pod, namespace)):

{namespace="openshift-machine-config-operator",pod="etcd-quorum-guard-6c84498b67-8j26k"}	987980.2409884613
{namespace="openshift-machine-config-operator",pod="machine-config-daemon-f2csf"}	831509.3057231784
{namespace="openshift-machine-config-operator",pod="machine-config-server-tm8t8"}	797245.3039967231
{namespace="openshift-machine-config-operator",pod="machine-config-daemon-pkwxr"}	789757.2120102048
{namespace="openshift-machine-config-operator",pod="etcd-quorum-guard-6c84498b67-b478g"}	783948.7519474922

Comment 2 Vadim Rutkovsky 2020-04-02 18:10:08 UTC
MCD uses hostnetwork so metrics for these pods are including the traffic for the whole node. MCD itself doesn't use too much bandswidth


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