xuyongsan

**What would you like to be added**: I want to learn about the installation, deployment and maintenance of karmada. Currently, I am too tired to study from the official website....

Register cluster with 'Pull' mode failde

2

**What happened**: when I use 'Pull' mode to Register cluster according offficial guide(https://karmada.io/zh/docs/userguide/clustermanager/cluster-registration), register fail. **What you expected to happen**: **How to reproduce it (as minimally and precisely as possible)**:...