UCloud Tech

Apr 11, 2019 · Cloud Native

Why Does a Kubernetes Pod IP Disappear? The Hidden Second Sandbox Bug

UK8S’s custom CNI plugin integrates VPC networking to give containers native cloud performance, but a bug caused kubelet to create a second sandbox container, leading to missing NETNS parameters and VPC IP leaks; the article details the investigation, root‑cause analysis, and the patch fixing the issue.