Diagnostic Tool for DNS lookup

NOTE

Requires abilility to grand SCC privileged to default SA to run this tool.

Usage

1. Edit the dns-gather-tool.yaml file to add the hosts
2. Apply the yaml - oc apply -f dns-gather-tool.yaml
3. daemonset won't start unless default serviceaccount has privileged SCC
4. Grant scc privileged to default SA

  oc project dns-gather-tool
  oc admin policy add-scc-to-user -z default

1. Restart the daemonset

• oc delete daemonset/dns-gather-tool
• oc apply -f dns-gather-tool.yaml

This should start the daemonset and will start collecting dns lookup info. All sucessfull lookups will be ignored and only the failed ones will be collected.

Use gather-diagnostic-info.sh to copy the data to your local machine for further analysis.

How it works

TODO

• find a better way to bootstrap/deploy the tool
• Add verbose usage info
• Add How it works section