Merge pull request douyu#219 from linyuyizhipao/master

feat:禁用与启用grpc

feat: jaeger trace demo

Signed-off-by: MEX7 <mex7.0828@gmail.com>

chore: replace google.golang.org/grpc => google.golang.org/grpc v1.26.0

Signed-off-by: MEX7 <mex7.0828@gmail.com>

feat: grpc update v1.26.0->v.31.0

Signed-off-by: MEX7 <mex7.0828@gmail.com>

update sentinel to v0.6.0

Dev etcd lease session (douyu#162)

* using etcd client session

Merge pull request douyu#150 from douyu/fix-regrister-watch

fix regrister watch  zero value error

Merge pull request douyu#144 from douyu/document

fix jupiter tool template

Merge pull request douyu#139 from douyu/hotfix-service-name

fix service name for registry

Feat/optimize (douyu#134)

fix test case