Sermant framework supports route and load balance config based xDS protocol

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/xds/XdsLoadBalanceService.java

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+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+package io.sermant.core.service.xds;
+
+import io.sermant.core.service.xds.entity.XdsLbPolicy;
+
+/**
+ * xDS load balance service
+ *
+ * @author daizhenyu
+ * @since 2024-07-30
+ **/
+public interface XdsLoadBalanceService {
+    /**
+     * get lb policy of cluster
+     *
+     * @param clusterName cluster name
+     * @return route rules
+     */
+    XdsLbPolicy getClusterLbPolicy(String clusterName);
+
+    /**
+     * get lb policy of service (base cluster)
+     *
+     * @param serviceName service name
+     * @return route rules
+     */
+    XdsLbPolicy getServiceLbPolicy(String serviceName);
+}

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/xds/XdsRouteService.java

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+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+package io.sermant.core.service.xds;
+
+import io.sermant.core.service.xds.entity.XdsRoute;
+
+import java.util.List;
+
+/**
+ * xDS route service
+ *
+ * @author daizhenyu
+ * @since 2024-07-30
+ **/
+public interface XdsRouteService {
+    /**
+     * get route rules of service
+     *
+     * @param serviceName service name
+     * @return route rules
+     */
+    List<XdsRoute> getServiceRoute(String serviceName);
+
+    /**
+     * get lb policy of cluster
+     *
+     * @param clusterName cluster name
+     * @return route rules
+     */
+    boolean isLocalityRoute(String clusterName);
+}

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/xds/entity/XdsCluster.java

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+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+package io.sermant.core.service.xds.entity;
+
+/**
+ * XdsCluster corresponds to io.envoyproxy.envoy.config.cluster.v3.Cluster
+ *
+ * @author daizhenyu
+ * @since 2024-08-06
+ **/
+public class XdsCluster {
+    private String clusterName;
+
+    private String serviceName;
+
+    private XdsLbPolicy lbPolicy;
+
+    private boolean isLocalityLb;
+
+    public String getClusterName() {
+        return clusterName;
+    }
+
+    public void setClusterName(String clusterName) {
+        this.clusterName = clusterName;
+    }
+
+    public String getServiceName() {
+        return serviceName;
+    }
+
+    public void setServiceName(String serviceName) {
+        this.serviceName = serviceName;
+    }
+
+    public XdsLbPolicy getLbPolicy() {
+        return lbPolicy;
+    }
+
+    public void setLbPolicy(XdsLbPolicy lbPolicy) {
+        this.lbPolicy = lbPolicy;
+    }
+
+    public boolean isLocalityLb() {
+        return isLocalityLb;
+    }
+
+    public void setLocalityLb(boolean localityLb) {
+        isLocalityLb = localityLb;
+    }
+}

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/xds/entity/XdsClusterLoadAssigment.java

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+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+package io.sermant.core.service.xds.entity;
+
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * XdsClusterLoadAssigment corresponds to io.envoyproxy.envoy.config.endpoint.v3.ClusterLoadAssignment
+ *
+ * @author daizhenyu
+ * @since 2024-08-15
+ **/
+public class XdsClusterLoadAssigment {
+    private String serviceName;
+
+    private String clusterName;
+
+    private Map<XdsLocality, Set<ServiceInstance>> localityInstances;
+
+    public String getServiceName() {
+        return serviceName;
+    }
+
+    public void setServiceName(String serviceName) {
+        this.serviceName = serviceName;
+    }
+
+    public String getClusterName() {
+        return clusterName;
+    }
+
+    public void setClusterName(String clusterName) {
+        this.clusterName = clusterName;
+    }
+
+    public Map<XdsLocality, Set<ServiceInstance>> getLocalityInstances() {
+        return localityInstances;
+    }
+
+    public void setLocalityInstances(
+            Map<XdsLocality, Set<ServiceInstance>> localityInstances) {
+        this.localityInstances = localityInstances;
+    }
+}

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/xds/entity/XdsHeaderMatcher.java

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+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+package io.sermant.core.service.xds.entity;
+
+import io.sermant.core.service.xds.entity.match.MatchStrategy;
+
+import java.util.Map;
+
+/**
+ * xDS HeaderMatcher
+ *
+ * @author daizhenyu
+ * @since 2024-08-15
+ **/
+public class XdsHeaderMatcher {
+    private final String name;
+
+    private final MatchStrategy matchStrategy;
+
+    /**
+     * parameterized constructor
+     *
+     * @param name header name
+     * @param matchStrategy match strategy
+     */
+    public XdsHeaderMatcher(String name, MatchStrategy matchStrategy) {
+        this.name = name;
+        this.matchStrategy = matchStrategy;
+    }
+
+    /**
+     * the request header matches the route configuration header or not.
+     *
+     * @param headers request headers
+     * @return isMatch
+     */
+    public boolean isMatch(Map<String, String> headers) {
+        if (headers.containsKey(name)) {
+            return matchStrategy.isMatch(headers.get(name));
+        }
+        return false;
+    }
+}

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/xds/entity/XdsHttpConnectionManager.java

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+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+package io.sermant.core.service.xds.entity;
+
+/**
+ * xDS HttpConnectionManager
+ *
+ * @author daizhenyu
+ * @since 2024-08-15
+ **/
+public class XdsHttpConnectionManager {
+    private String routeConfigName;
+
+    public String getRouteConfigName() {
+        return routeConfigName;
+    }
+
+    public void setRouteConfigName(String routeConfigName) {
+        this.routeConfigName = routeConfigName;
+    }
+}

sermant-agentcore/sermant-agentcore-core/src/main/java/io/sermant/core/service/xds/entity/XdsLbPolicy.java

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+/*
+ * Copyright (C) 2024-2024 Sermant Authors. All rights reserved.
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ */
+
+package io.sermant.core.service.xds.entity;
+
+/**
+ * xDS LbPolicy
+ *
+ * @author daizhenyu
+ * @since 2024-08-15
+ **/
+public enum XdsLbPolicy {
+    /**
+     * random
+     */
+    RANDOM,
+    /**
+     * round_robin
+     */
+    ROUND_ROBIN,
+    /**
+     * least_request
+     */
+    LEAST_REQUEST,
+    /**
+     * ring_hash
+     */
+    RING_HASH,
+    /**
+     * maglev
+     */
+    MAGLEV,
+    /**
+     * unrecognized
+     */
+    UNRECOGNIZED;
+}