private List<DivideUpstream> parseUpstream(final V1IngressBackend backend, final String namespace, final Map<String, String> annotations) {
        List<DivideUpstream> upstreamList = new ArrayList<>();
        if (Objects.nonNull(backend) && Objects.nonNull(backend.getService()) && Objects.nonNull(backend.getService().getName())) {
            String serviceName = backend.getService().getName();
            // shenyu routes directly to the container
            V1Endpoints v1Endpoints = endpointsLister.namespace(namespace).get(serviceName);
            List<V1EndpointSubset> subsets = v1Endpoints.getSubsets();
            String[] protocol = null;
            if (Objects.nonNull(annotations) && annotations.containsKey(IngressConstants.UPSTREAMS_PROTOCOL_ANNOTATION_KEY)) {
                protocol = annotations.get(IngressConstants.UPSTREAMS_PROTOCOL_ANNOTATION_KEY).split(",");
            }
            if (Objects.isNull(subsets) || CollectionUtils.isEmpty(subsets)) {
                LOG.info("Endpoints {} do not have subsets", serviceName);
            } else {
                for (V1EndpointSubset subset : subsets) {
                    List<V1EndpointAddress> addresses = subset.getAddresses();
                    if (Objects.isNull(addresses) || addresses.isEmpty()) {
                        continue;
                    }
                    int i = 0;
                    for (V1EndpointAddress address : addresses) {
                        String upstreamIp = address.getIp();
                        String defaultPort = parsePort(backend.getService());
                        if (Objects.nonNull(defaultPort)) {
                            DivideUpstream upstream = new DivideUpstream();
                            upstream.setUpstreamUrl(upstreamIp + ":" + defaultPort);
                            upstream.setWeight(100);
                            upstream.setProtocol(Objects.isNull(protocol) ? "http://" : protocol[i++]);
                            upstream.setWarmup(0);
                            upstream.setStatus(true);
                            upstream.setUpstreamHost("");
                            upstreamList.add(upstream);
                        }
                    }
                }
            }
        }
        return upstreamList;
    }
Parse ingress to ShenyuMemoryConfig.

@param ingress ingress resource
@param coreV1Api coreV1Api
@return ShenyuMemoryConfig
shenyu-kubernetes-controller/src/main/java/org/apache/shenyu/k8s/parser/DivideIngressParser.java