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Kernel Configs

Collects and analyzes information about available Kernel Configs on the machine.

Kernel Configs Collector

To collect information about the available Kernel Configs, you can use the kernelConfigs collector.

Only config options with values =y (built into kernel), =m (loadable module) or =n (feature is disabled) will be collected.

Parameters

None.

Example Collector Definition

apiVersion: troubleshoot.sh/v1beta2
kind: SupportBundle
metadata:
  name: kernel-configs
spec:
  hostCollectors:
    - kernelConfigs: {}

Included Resources

The results of the kernelConfigs collector are stored in the host-collectors/system directory of the support bundle.

kernel-configs.json

Example of the resulting JSON file:

{
  "CONFIG_9P_FS": "y",
  "CONFIG_ARCH_CORRECT_STACKTRACE_ON_KRETPROBE": "y",
  "CONFIG_ARCH_HAS_STRICT_MODULE_RWX": "y",
  "CONFIG_ARCH_HAVE_TRACE_MMIO_ACCESS": "y",
  "CONFIG_ARCH_SUPPORTS_UPROBES": "y",
  "CONFIG_ARCH_WANT_DEFAULT_BPF_JIT": "y",
  "CONFIG_AUTOFS_FS": "y",
  "CONFIG_BLK_CGROUP": "y",
  "CONFIG_BLK_CGROUP_PUNT_BIO": "y"
}

Kernel Configs Analyzer

The kernelConfigs analyzer supports only pass or fail outcomes. In the case of a fail outcome, the placeholder {{ .ConfigsNotFound }} can be used to render a list of missing kernel configurations in the message.

Parameters

selectedConfigs (Required)

List of kernel config parameters that must be available.

Example Analyzer Definition

apiVersion: troubleshoot.sh/v1beta2
kind: SupportBundle
metadata:
  name: kernel-configs
spec:
  hostCollectors:
    - kernelConfigs: {}
  hostAnalyzers:
    - kernelConfigs:
        collectorName: "Kernel Configs Test"
        strict: true
        selectedConfigs:
          - CONFIG_CGROUP_FREEZER=y
          - CONFIG_NETFILTER_XTABLES=m
        outcomes:
          - pass:
              message: "required kernel configs are available"
          - fail:
              message: "missing kernel config(s): {{ .ConfigsNotFound }}"
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