Add ping test and remove etcd proxy mode example
Add ping test and remove etcd proxy mode example

k8sp/sextant,k8sp/sextant,k8sp/sextant,JunfeiYang/sextant,JunfeiYang/sextant,k8sp/sextant,JunfeiYang/sextant,gaoyw1/sextant,zhengbo0/sextant,gaoyw1/sextant,zhengbo0/sextant,zhengbo0/sextant,gaoyw1/sextant