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TCP Connect

Collect and analyze information about the ability to connect to the specified TCP address.

TCP Connect Collector

To collect information about the ability to connect to a specified TCP address, you can use the tcpConnect collector.

Parameters

In addition to the shared collector properties, the tcpConnect collector accepts the following parameters:

address (Required)

The address to check the connection to.

timeout (Optional)

Specifies the total timeout.

Example Collector Definition

apiVersion: troubleshoot.sh/v1beta2
kind: SupportBundle
metadata:
  name: tcpConnect
spec:
  hostCollectors:
    - tcpConnect:
        collectorName: kubernetes-api-tcp-conn-status
        address: 10.128.0.29:6443
        timeout: 10s

Included Resources

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

[collector-name].json

If the collectorName field is unset, it will be named connect.json.

Example of the resulting file:

connection-refused

TCP Connect Analyzer

The tcpConnect analyzer supports multiple outcomes:

  • connection-refused: Connection to the address was refused.
  • connection-timeout: Timed out connecting to the address.
  • connected: Successfully connected to the address.
  • error: Unexpected error connecting to the address.

Example Analyzer Definition

apiVersion: troubleshoot.sh/v1beta2
kind: SupportBundle
metadata:
  name: tcpConnect
spec:
  hostCollectors:
    - tcpConnect:
        collectorName: kubernetes-api-tcp-conn-status
        address: 10.128.0.29:6443
        timeout: 10s
  hostAnalyzers:
    - tcpConnect:
        checkName: "Kubernetes API TCP Connection Status"
        collectorName: kubernetes-api-tcp-conn-status
        outcomes:
          - fail:
              when: "connection-refused"
              message: Connection to the Kubernetes API address was refused
          - fail:
              when: "connection-timeout"
              message: Timed out connecting to the Kubernetes API address
          - fail:
              when: "error"
              message: Unexpected error connecting to the Kubernetes API address 
          - pass:
              when: "connected"
              message: Successfully connected to the Kubernetes API address
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