preflight.yaml

apiVersion: troubleshoot.sh/v1beta3
kind: HostPreflight
metadata:
  name: kurl-builtin
spec:
  collectors:
    - cpu: {}
    - memory: {}
    - tcpPortStatus:
        collectorName: "Kubernetes API TCP Port Status"
        port: 6443
        exclude: '{{kurl and .IsPrimary (not .IsUpgrade) | not }}'
  analyzers:      
      - tcpPortStatus:
        checkName: "Kubelet API TCP Port Status"
        collectorName: "Kubelet API TCP Port Status"
        default:
          outcome: warn
          message: unexpected port status        
    - cpu:
        checkName: "Number of CPUs"
        outcomes:
          - warn:
              when: '$count >= 2 AND $count < 4'
              message: At least 4 CPU cores are recommended
          - fail:
              when: '$count < 2'
              message: At least 2 CPU cores are required, and 4 CPU cores are recommended
          - pass: '$count >= 4'
              message: This server has at least 4 CPU cores
    - memory:
        checkName: "Amount of Memory"
        outcomes:
          - warn:
              when: '$memory >= 4G AND $memory < 8G"
              message: At least 8G of memory is recommended
          - fail:
              when: '$memory < 4G'
              message: At least 4G of memory is required, and 8G of memory is recommended
          - pass:
              when: '$memory >= 8G'
              message: The system has at least 8G of memory          
        outcomes:
          - fail:
              when: '$status == "connection-refused"'
              message: Connection to port 10250 was refused. This is likely to be a routing problem since this preflight configures a test server to listen on this port.
          - warn:
              when: '$status == "address-in-use"'
              message: Another process was already listening on port 10250.
          - fail:
              when: '$status == "connection-timeout"'
              message: Timed out connecting to port 10250. Check your firewall.
          - fail:
              when: '$status == "error"'
              message: Unexpected port status
          - pass:
              when: '$status == connected'
              message: Port 10250 is open