examples/quick_start/mersher-g/conf/router.yaml

#routeRule:
#  mersher-provider:        #service name
#    - precedence: 2    #precedence of route rule
#      route:           #route rule list
#      - tags:
#          version: 1.1.1
#        weight: 50     #weight of 20%
#      - tags:
#          version: 1.1.2
#        weight: 50     #weight of 20%