Kubernetes Cookbook - Second Edition

Getting ready

Prior to applying Kubernetes Services, it is important to verify whether all nodes in the system are running kube-proxy. The daemon kube-proxy works as a network proxy in a node. It helps to reflect Service settings, such as IPs or ports on each node, and to do network forwarding. To check if kube-proxy is running or not, we take a look at network connections:

// check by command netstat with proper tags for showing the information we need, t:tcp, u:udp, l:listening, p:program, n:numeric address// use root privilege for grabbing all processes$ sudo netstat -tulpn | grep kube-proxytcp        0      0 127.0.0.1:10249         0.0.0.0:*               LISTEN      2326/kube-proxytcp6       0      0 :::31723                :::*                    LISTEN      2326/kube-proxytcp6 0 0 :::10256 :::* LISTEN 2326/kube-proxy ...