gxthrj opened a new issue #351:
URL: https://github.com/apache/apisix-ingress-controller/issues/351
### Issue description
Apply ApisixRoute one by one cause dirty configuration
step 1:
```yaml
apiVersion: apisix.apache.org/v2alpha1
kind: ApisixRoute
metadata:
name: httpbin-route
namespace: xxx
spec:
http:
- name: rule1
match:
hosts:
- httpbin.com
paths:
- /ip
backends:
- serviceName: httpbin-service-e2e-test
servicePort: 80
weight: 50
- serviceName: httpbin-service-e2e-test-v2
servicePort: 80
weight: 100
```
The route in APISIX like this:
```shell
{"action":"get","node":{"nodes":[{"modifiedIndex":142,"value":{"priority":0,"status":1,"hosts":["httpbin.com"],"id":"3fc92fca","create_time":1617946799,"update_time":1617946799,"name":"xxx_httpbin-route_rule1","desc":"xxx_httpbin-route_rule1","uris":["\/ip"],"upstream_id":"d678a7ac"},"createdIndex":142,"key":"\/apisix\/routes\/3fc92fca"}],"key":"\/apisix\/routes","dir":true},"count":"2"}
```
step 2:
```yaml
kubectl apply -f - <<EOF
apiVersion: apisix.apache.org/v2alpha1
kind: ApisixRoute
metadata:
name: httpbin-route
namespace: xxx
spec:
http:
- name: rule1
priority: 1
match:
hosts:
- httpbin.com
paths:
- /ip
backend:
serviceName: httpbin-service-e2e-test
servicePort: 80
- name: rule2
priority: 2
match:
hosts:
- httpbin.com
paths:
- /ip
exprs:
- subject:
scope: Cookie
name: X-Foo
op: Equal
value: v2
backend:
serviceName: httpbin-service-e2e-test-v2
servicePort: 80
EOF
```
The route in APISIX like this, the plugin `traffic-split` should be removed.
```shell
{"action":"get","node":{"nodes":[{"modifiedIndex":144,"value":{"priority":0,"status":1,"plugins":{"traffic-split":{"rules":[{"weighted_upstreams":[{"weight":100,"upstream_id":"cd3dc953"},{"weight":50}],"match":[{"vars":[["server_port",">",0]]}]}]}},"id":"3fc92fca","create_time":1617946799,"update_time":1617946924,"name":"xxx_httpbin-route_rule1","hosts":["httpbin.com"],"uris":["\/ip"],"desc":"xxx_httpbin-route_rule1","upstream_id":"d678a7ac"},"createdIndex":142,"key":"\/apisix\/routes\/3fc92fca"}],"key":"\/apisix\/routes","dir":true},"count":"2"}
```
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