awalterschulze

mybinary

mohanpedala

Network Troubleshooting

Inspecting Conntrack Connection Tracking

• Prior to version 1.11, Kubernetes used iptables NAT and the conntrack kernel module to track connections. To list all the connections currently being tracked, use the conntrack command:
• To list conntrack-tracked connections to a particular destination address, use the -d flag:

  conntrack -L -d 10.32.0.1
  

Node connection table full (issues making reliable connections to services)

• It's possible your connection tracking table is full and new connections are being dropped. If that's the case you may see messages like the following in your system logs: