When running must-gather, a DaemonSet is created to collect performance related information for nodes in a cluster. If a node is tainted (for example with well defined OpenShift taints for Infra nodes, ODF nodes, master nodes etc), then the DaemonSet does not create Pods on these nodes and the information is not collected.

    4.14.z

    Reproducible

1. Taint a node in a cluster with a custom taint i.e. "oc adm taint  node <node_name> node-role.kubernetes.io/infra=reserved:NoSchedule node-role.kubernetes.io/infra=reserved:NoExecute". Ensure at least one node is not tainted.    

2.Run `oc adm must-gather` to generate report to local filesystem
  
    

    The performance stats collected under directory <must_gather_dir>/nodes/ only contains results for nodes without taints.

    The performance stats collected under directory <must_gather_dir>/nodes/ should contain entries for all nodes in the cluster.

    This issue has been identified by using the Performance Profile Creator. This tool requires the output of must-gather as its input (as described in the instructions here: https://docs.openshift.com/container-platform/4.14/scalability_and_performance/cnf-create-performance-profiles.html#running-the-performance-profile-profile-cluster-using-podman_cnf-create-performance-profiles). When following this guide, the missing performance information for tainted nodes results in being returned the error "failed to load node's worker's GHW snapshot: can't obtain the path: <node_name>" when running the tool in discovery mode