Copilot commented on code in PR #2540:
URL:
https://github.com/apache/apisix-ingress-controller/pull/2540#discussion_r2317638973
##########
internal/adc/translator/httproute.go:
##########
@@ -466,32 +467,89 @@ func (t *Translator) TranslateHTTPRoute(tctx
*provider.TranslateContext, httpRou
labels := label.GenLabel(httpRoute)
for ruleIndex, rule := range rules {
- upstream := adctypes.NewDefaultUpstream()
- var backendErr error
+ service := adctypes.NewDefaultService()
+ service.Labels = labels
+
+ service.Name =
adctypes.ComposeServiceNameWithRule(httpRoute.Namespace, httpRoute.Name,
fmt.Sprintf("%d", ruleIndex))
+ service.ID = id.GenID(service.Name)
+ service.Hosts = hosts
+
+ var (
+ upstreams = make([]*adctypes.Upstream, 0)
+ weightedUpstreams =
make([]adctypes.TrafficSplitConfigRuleWeightedUpstream, 0)
+ backendErr error
+ )
+
for _, backend := range rule.BackendRefs {
if backend.Namespace == nil {
namespace :=
gatewayv1.Namespace(httpRoute.Namespace)
backend.Namespace = &namespace
}
+ upstream := adctypes.NewDefaultUpstream()
upNodes, err := t.translateBackendRef(tctx,
backend.BackendRef, DefaultEndpointFilter)
if err != nil {
backendErr = err
continue
}
+ if len(upNodes) == 0 {
+ continue
+ }
+
t.AttachBackendTrafficPolicyToUpstream(backend.BackendRef,
tctx.BackendTrafficPolicies, upstream)
- upstream.Nodes = append(upstream.Nodes, upNodes...)
+ upstream.Nodes = upNodes
+ upstreams = append(upstreams, upstream)
}
- // todo: support multiple backends
- service := adctypes.NewDefaultService()
- service.Labels = labels
+ // Handle multiple backends with traffic-split plugin
+ if len(upstreams) == 0 {
+ // Create a default upstream if no valid backends
+ upstream := adctypes.NewDefaultUpstream()
+ service.Upstream = upstream
+ } else if len(upstreams) == 1 {
+ // Single backend - use directly as service upstream
+ service.Upstream = upstreams[0]
+ } else {
+ // Multiple backends - use traffic-split plugin
+ service.Upstream = upstreams[0]
+ upstreams = upstreams[1:]
+
+ // Set weight in traffic-split for the default upstream
+ weight := apiv2.DefaultWeight
+ if rule.BackendRefs[0].Weight != nil {
+ weight = int(*rule.BackendRefs[0].Weight)
+ }
+ weightedUpstreams = append(weightedUpstreams,
adctypes.TrafficSplitConfigRuleWeightedUpstream{
+ Weight: weight,
+ })
- service.Name =
adctypes.ComposeServiceNameWithRule(httpRoute.Namespace, httpRoute.Name,
fmt.Sprintf("%d", ruleIndex))
- service.ID = id.GenID(service.Name)
- service.Hosts = hosts
- service.Upstream = upstream
+ // Set other upstreams in traffic-split
+ for i, upstream := range upstreams {
+ weight := apiv2.DefaultWeight
+ // get weight from the backend ref start from
the second backend
Review Comment:
The comment has a grammatical error. It should read 'get weight from the
backend ref starting from the second backend' or 'get weight from the backend
refs starting from the second backend'.
```suggestion
// get weight from the backend refs starting
from the second backend
```
##########
internal/adc/translator/httproute.go:
##########
@@ -466,32 +467,89 @@ func (t *Translator) TranslateHTTPRoute(tctx
*provider.TranslateContext, httpRou
labels := label.GenLabel(httpRoute)
for ruleIndex, rule := range rules {
- upstream := adctypes.NewDefaultUpstream()
- var backendErr error
+ service := adctypes.NewDefaultService()
+ service.Labels = labels
+
+ service.Name =
adctypes.ComposeServiceNameWithRule(httpRoute.Namespace, httpRoute.Name,
fmt.Sprintf("%d", ruleIndex))
+ service.ID = id.GenID(service.Name)
+ service.Hosts = hosts
+
+ var (
+ upstreams = make([]*adctypes.Upstream, 0)
+ weightedUpstreams =
make([]adctypes.TrafficSplitConfigRuleWeightedUpstream, 0)
+ backendErr error
+ )
+
for _, backend := range rule.BackendRefs {
if backend.Namespace == nil {
namespace :=
gatewayv1.Namespace(httpRoute.Namespace)
backend.Namespace = &namespace
}
+ upstream := adctypes.NewDefaultUpstream()
upNodes, err := t.translateBackendRef(tctx,
backend.BackendRef, DefaultEndpointFilter)
if err != nil {
backendErr = err
continue
}
+ if len(upNodes) == 0 {
+ continue
+ }
+
t.AttachBackendTrafficPolicyToUpstream(backend.BackendRef,
tctx.BackendTrafficPolicies, upstream)
- upstream.Nodes = append(upstream.Nodes, upNodes...)
+ upstream.Nodes = upNodes
+ upstreams = append(upstreams, upstream)
}
- // todo: support multiple backends
- service := adctypes.NewDefaultService()
- service.Labels = labels
+ // Handle multiple backends with traffic-split plugin
+ if len(upstreams) == 0 {
+ // Create a default upstream if no valid backends
+ upstream := adctypes.NewDefaultUpstream()
+ service.Upstream = upstream
+ } else if len(upstreams) == 1 {
+ // Single backend - use directly as service upstream
+ service.Upstream = upstreams[0]
+ } else {
+ // Multiple backends - use traffic-split plugin
+ service.Upstream = upstreams[0]
+ upstreams = upstreams[1:]
+
+ // Set weight in traffic-split for the default upstream
+ weight := apiv2.DefaultWeight
+ if rule.BackendRefs[0].Weight != nil {
+ weight = int(*rule.BackendRefs[0].Weight)
+ }
+ weightedUpstreams = append(weightedUpstreams,
adctypes.TrafficSplitConfigRuleWeightedUpstream{
+ Weight: weight,
+ })
- service.Name =
adctypes.ComposeServiceNameWithRule(httpRoute.Namespace, httpRoute.Name,
fmt.Sprintf("%d", ruleIndex))
- service.ID = id.GenID(service.Name)
- service.Hosts = hosts
- service.Upstream = upstream
+ // Set other upstreams in traffic-split
+ for i, upstream := range upstreams {
+ weight := apiv2.DefaultWeight
+ // get weight from the backend ref start from
the second backend
+ if i+1 < len(rule.BackendRefs) &&
rule.BackendRefs[i+1].Weight != nil {
+ weight =
int(*rule.BackendRefs[i+1].Weight)
+ }
Review Comment:
The weight assignment logic is incorrect. The loop index `i` corresponds to
`upstreams[i]`, but the weight is taken from `rule.BackendRefs[i+1]`. This
creates an off-by-one error since `upstreams` starts from the second backend
(index 1 in BackendRefs), so the weight should come from
`rule.BackendRefs[i+1]` which is actually `rule.BackendRefs[i+2]` in the
original BackendRefs array.
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