Automatic merge from submit-queue (batch tested with PRs 61010, 61315, 62268). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fix some shadow declaration in cmd package

**What this PR does / why we need it**:

There are some shadow declaration variables used in cmd package. 

Release note:
```
NONE
```
Signed-off-by: Lei Gong <lgong@alauda.io>