[GitHub] [apisix] nic-6443 commented on issue #6443: request help: upstream how to do failover

[GitBox <gi...@apache.org>]

nic-6443 commented on issue #6443:
URL: https://github.com/apache/apisix/issues/6443#issuecomment-1050869844


   > > See https://apisix.apache.org/docs/apisix/next/architecture-design/upstream/, you can refer to the node priority.
   > 
   > This should not meet my requirement, my requirement is that under normal circumstances the request will only hit node A and node B. Only if both node A and node B are down, the request will auto go to node C.
   
   Please read the upstream documentation carefully, this function can be achieved by node priority and active healthy check, there is a very clear demonstration case in the documentation, similar to the following：
   ```shell
   curl --location --request PUT 'http://apisix-admin:9180/apisix/admin/routes/failover' \
   --header 'X-API-KEY: edd1c9f034335f136f87ad84b625c8f1' \
   --header 'Content-Type: application/json' \
   --data-raw '{
       "host": "failover",
       "uri": "/*",
       "upstream": {
           "type": "roundrobin",
           "nodes": [
               {"host": "172.30.45.124", "port": 80, "weight": 1},
               {"host": "172.30.45.125", "port": 80, "weight": 1},
               {"host": "172.30.45.126", "port": 80, "weight": 1, "priority": -1}
           ],
           "checks": {
               "active": {
                   "http_path": "/status/200",
                   "healthy": {
                       "interval": 1,
                       "successes": 1
                   },
                   "unhealthy": {
                       "interval": 1,
                       "http_failures": 1
                   }
               }
           }
       },
       "name": "failover"
   }'
   ```
   


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