Networking Cheatsheet

Note

This is not official documentation for AutomationSuite

Glossary of frequently used commands

Check connectivity of a URL

if nc -z -v -w5 loki:3100 &>/dev/null; then echo "connected"; else echo "not able to connect"; fi

Check if IP and Port combo is reachable

telnet 127.0.0.1 8080

Port forwarding a service

kubectl -n rabbitmq port-forward service/rabbitmq 8800:15672
kubectl -n rook-ceph port-forward service/rook-ceph-mgr-dashboard 8800:8443

Check if LB is resolvable via host

curl -m 5 -v -k -i --resolve LB_URL:443:IP_OF_HOST https://LB_URL

Check connectivity in loop

for i in {1..100}; do curl -m 5 -v -k -i --resolve LB_URL:443:IP_OF_HOST https://LB_URL; done

Check if a URL is resolvable via all DNS servers

cat /etc/resolv.conf

nslookup github.com FIRST_DNS_SERVER_IP
nslookup github.com SECOND_DNS_SERVER_IP

Check Connectivity between Nodes (Overlay Test) Network connectivity test can be done via overlay-networking-test Or the same test can be done via Diagnostics tool if it's an airgap environment