diff --git a/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultGrpcTelemetryConfig.java b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultGrpcTelemetryConfig.java
new file mode 100644
index 0000000..7b0433e
--- /dev/null
+++ b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultGrpcTelemetryConfig.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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 org.onosproject.openstacktelemetry.config;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import org.onosproject.openstacktelemetry.api.config.GrpcTelemetryConfig;
+
+import java.util.Map;
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * A configuration file contains gRPC telemetry parameters.
+ */
+public final class DefaultGrpcTelemetryConfig implements GrpcTelemetryConfig {
+
+    private final String address;
+    private final int port;
+    private final boolean usePlaintext;
+    private final int maxInboundMsgSize;
+    private final Map<String, Object> configMap;
+
+    private DefaultGrpcTelemetryConfig(String address, int port,
+                                       boolean usePlaintext, int maxInboundMsgSize,
+                                       Map<String, Object> configMap) {
+        this.address = address;
+        this.port = port;
+        this.usePlaintext = usePlaintext;
+        this.maxInboundMsgSize = maxInboundMsgSize;
+        this.configMap = configMap;
+    }
+
+    @Override
+    public String address() {
+        return address;
+    }
+
+    @Override
+    public int port() {
+        return port;
+    }
+
+    @Override
+    public boolean usePlaintext() {
+        return usePlaintext;
+    }
+
+    @Override
+    public int maxInboundMsgSize() {
+        return maxInboundMsgSize;
+    }
+
+    @Override
+    public Map<String, Object> configMap() {
+        if (configMap != null) {
+            return ImmutableMap.copyOf(configMap);
+        } else {
+            return Maps.newConcurrentMap();
+        }
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if (obj instanceof DefaultGrpcTelemetryConfig) {
+            final DefaultGrpcTelemetryConfig other = (DefaultGrpcTelemetryConfig) obj;
+            return Objects.equals(this.address, other.address) &&
+                    Objects.equals(this.port, other.port) &&
+                    Objects.equals(this.usePlaintext, other.usePlaintext) &&
+                    Objects.equals(this.maxInboundMsgSize, other.maxInboundMsgSize) &&
+                    Objects.equals(this.configMap, other.configMap);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(address, port, usePlaintext, maxInboundMsgSize, configMap);
+    }
+
+    /**
+     * Builder class of DefaultKafkaTelemetryConfig.
+     */
+    public final class DefaultBuilder implements Builder {
+
+        private String address;
+        private int port;
+        private boolean usePlaintext;
+        private int maxInboundMsgSize;
+        private Map<String, Object> configMap;
+
+        @Override
+        public Builder withAddress(String address) {
+            this.address = address;
+            return this;
+        }
+
+        @Override
+        public Builder withPort(int port) {
+            this.port = port;
+            return this;
+        }
+
+        @Override
+        public Builder withUsePlaintext(boolean usePlaintext) {
+            this.usePlaintext = usePlaintext;
+            return this;
+        }
+
+        @Override
+        public Builder withMaxInboundMsgSize(int maxInboundMsgSize) {
+            this.maxInboundMsgSize = maxInboundMsgSize;
+            return this;
+        }
+
+        @Override
+        public Builder withConfigMap(Map<String, Object> configMap) {
+            this.configMap = configMap;
+            return this;
+        }
+
+        @Override
+        public GrpcTelemetryConfig build() {
+            checkNotNull(address, "gRPC server address cannot be null");
+
+            return new DefaultGrpcTelemetryConfig(address, port, usePlaintext,
+                    maxInboundMsgSize, configMap);
+        }
+    }
+}
diff --git a/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultInfluxDbTelemetryConfig.java b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultInfluxDbTelemetryConfig.java
new file mode 100644
index 0000000..a95517b
--- /dev/null
+++ b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultInfluxDbTelemetryConfig.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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 org.onosproject.openstacktelemetry.config;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import org.onosproject.openstacktelemetry.api.config.InfluxDbTelemetryConfig;
+
+import java.util.Map;
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * A configuration file contains InfluxDB telemetry parameters.
+ */
+public final class DefaultInfluxDbTelemetryConfig implements InfluxDbTelemetryConfig {
+
+    private final String address;
+    private final int port;
+    private final String username;
+    private final String password;
+    private final String database;
+    private final boolean enableBatch;
+    private final Map<String, Object> configMap;
+
+    private DefaultInfluxDbTelemetryConfig(String address, int port,
+                                           String username, String password,
+                                           String database, boolean enableBatch,
+                                           Map<String, Object> configMap) {
+        this.address = address;
+        this.port = port;
+        this.username = username;
+        this.password = password;
+        this.database = database;
+        this.enableBatch = enableBatch;
+        this.configMap = configMap;
+    }
+
+    @Override
+    public String address() {
+        return address;
+    }
+
+    @Override
+    public int port() {
+        return port;
+    }
+
+    @Override
+    public String username() {
+        return username;
+    }
+
+    @Override
+    public String password() {
+        return password;
+    }
+
+    @Override
+    public String database() {
+        return database;
+    }
+
+    @Override
+    public boolean enableBatch() {
+        return enableBatch;
+    }
+
+    @Override
+    public Map<String, Object> configMap() {
+        if (configMap != null) {
+            return ImmutableMap.copyOf(configMap);
+        } else {
+            return Maps.newConcurrentMap();
+        }
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if (obj instanceof DefaultInfluxDbTelemetryConfig) {
+            final DefaultInfluxDbTelemetryConfig other = (DefaultInfluxDbTelemetryConfig) obj;
+            return Objects.equals(this.address, other.address) &&
+                    Objects.equals(this.port, other.port) &&
+                    Objects.equals(this.username, other.username) &&
+                    Objects.equals(this.password, other.password) &&
+                    Objects.equals(this.database, other.database) &&
+                    Objects.equals(this.enableBatch, other.enableBatch) &&
+                    Objects.equals(this.configMap, other.configMap);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(address, port, username, password, database, enableBatch, configMap);
+    }
+
+    /**
+     * Builder class of DefaultInfluxDbTelemetryConfig.
+     */
+    public final class DefaultBuilder implements Builder {
+
+        private String address;
+        private int port;
+        private String username;
+        private String password;
+        private String database;
+        private boolean enableBatch;
+        private Map<String, Object> configMap;
+
+        @Override
+        public Builder withAddress(String address) {
+            this.address = address;
+            return this;
+        }
+
+        @Override
+        public Builder withPort(int port) {
+            this.port = port;
+            return this;
+        }
+
+        @Override
+        public Builder withUsername(String username) {
+            this.username = username;
+            return this;
+        }
+
+        @Override
+        public Builder withPassword(String password) {
+            this.password = password;
+            return this;
+        }
+
+        @Override
+        public Builder withDatabase(String database) {
+            this.database = database;
+            return this;
+        }
+
+        @Override
+        public Builder withEnableBatch(boolean enableBatch) {
+            this.enableBatch = enableBatch;
+            return this;
+        }
+
+        @Override
+        public Builder withConfigMap(Map<String, Object> configMap) {
+            this.configMap = configMap;
+            return this;
+        }
+
+        @Override
+        public InfluxDbTelemetryConfig build() {
+            checkNotNull(address, "InfluxDB server address cannot be null");
+            checkNotNull(username, "InfluxDB server username cannot be null");
+            checkNotNull(password, "InfluxDB server password cannot be null");
+            checkNotNull(database, "InfluxDB server database cannot be null");
+
+            return new DefaultInfluxDbTelemetryConfig(address, port, username,
+                    password, database, enableBatch, configMap);
+        }
+    }
+}
diff --git a/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultKafkaTelemetryConfig.java b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultKafkaTelemetryConfig.java
new file mode 100644
index 0000000..9dc460a
--- /dev/null
+++ b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultKafkaTelemetryConfig.java
@@ -0,0 +1,229 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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 org.onosproject.openstacktelemetry.config;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import org.onosproject.openstacktelemetry.api.config.KafkaTelemetryConfig;
+
+import java.util.Map;
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * A configuration file contains Kafka telemetry parameters.
+ */
+public final class DefaultKafkaTelemetryConfig implements KafkaTelemetryConfig {
+
+    private final String address;
+    private final int port;
+    private final int retries;
+    private final String requiredAcks;
+    private final int batchSize;
+    private final int lingerMs;
+    private final int memoryBuffer;
+    private final String keySerializer;
+    private final String valueSerializer;
+    private final Map<String, Object> configMap;
+
+    private DefaultKafkaTelemetryConfig(String address, int port, int retries,
+                                        String requiredAcks, int batchSize,
+                                        int lingerMs, int memoryBuffer,
+                                        String keySerializer,
+                                        String valueSerializer,
+                                        Map<String, Object> configMap) {
+        this.address = address;
+        this.port = port;
+        this.retries = retries;
+        this.requiredAcks = requiredAcks;
+        this.batchSize = batchSize;
+        this.lingerMs = lingerMs;
+        this.memoryBuffer = memoryBuffer;
+        this.keySerializer = keySerializer;
+        this.valueSerializer = valueSerializer;
+        this.configMap = configMap;
+    }
+
+    @Override
+    public String address() {
+        return address;
+    }
+
+    @Override
+    public int port() {
+        return port;
+    }
+
+    @Override
+    public int retries() {
+        return retries;
+    }
+
+    @Override
+    public String requiredAcks() {
+        return requiredAcks;
+    }
+
+    @Override
+    public int batchSize() {
+        return batchSize;
+    }
+
+    @Override
+    public int lingerMs() {
+        return lingerMs;
+    }
+
+    @Override
+    public int memoryBuffer() {
+        return memoryBuffer;
+    }
+
+    @Override
+    public String keySerializer() {
+        return keySerializer;
+    }
+
+    @Override
+    public String valueSerializer() {
+        return valueSerializer;
+    }
+
+    @Override
+    public Map<String, Object> configMap() {
+        if (configMap != null) {
+            return ImmutableMap.copyOf(configMap);
+        } else {
+            return Maps.newConcurrentMap();
+        }
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if (obj instanceof DefaultKafkaTelemetryConfig) {
+            final DefaultKafkaTelemetryConfig other = (DefaultKafkaTelemetryConfig) obj;
+            return Objects.equals(this.address, other.address) &&
+                    Objects.equals(this.port, other.port) &&
+                    Objects.equals(this.retries, other.retries) &&
+                    Objects.equals(this.requiredAcks, other.requiredAcks) &&
+                    Objects.equals(this.batchSize, other.batchSize) &&
+                    Objects.equals(this.lingerMs, other.lingerMs) &&
+                    Objects.equals(this.memoryBuffer, other.memoryBuffer) &&
+                    Objects.equals(this.keySerializer, other.keySerializer) &&
+                    Objects.equals(this.valueSerializer, other.valueSerializer) &&
+                    Objects.equals(this.configMap, other.configMap);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(address, port, retries, requiredAcks, batchSize,
+                lingerMs, memoryBuffer, keySerializer, valueSerializer, configMap);
+    }
+
+    /**
+     * Builder class of DefaultKafkaTelemetryConfig.
+     */
+    public final class DefaultBuilder implements Builder {
+        private String address;
+        private int port;
+        private int retries;
+        private String requiredAcks;
+        private int batchSize;
+        private int lingerMs;
+        private int memoryBuffer;
+        private String keySerializer;
+        private String valueSerializer;
+        private Map<String, Object> configMap;
+
+        @Override
+        public Builder withAddress(String address) {
+            this.address = address;
+            return this;
+        }
+
+        @Override
+        public Builder withPort(int port) {
+            this.port = port;
+            return this;
+        }
+
+        @Override
+        public Builder withRetries(int retries) {
+            this.retries = retries;
+            return this;
+        }
+
+        @Override
+        public Builder withRequiredAcks(String requiredAcks) {
+            this.requiredAcks = requiredAcks;
+            return this;
+        }
+
+        @Override
+        public Builder withBatchSize(int batchSize) {
+            this.batchSize = batchSize;
+            return this;
+        }
+
+        @Override
+        public Builder withLingerMs(int lingerMs) {
+            this.lingerMs = lingerMs;
+            return this;
+        }
+
+        @Override
+        public Builder withMemoryBuffer(int memoryBuffer) {
+            this.memoryBuffer = memoryBuffer;
+            return this;
+        }
+
+        @Override
+        public Builder withKeySerializer(String keySerializer) {
+            this.keySerializer = keySerializer;
+            return this;
+        }
+
+        @Override
+        public Builder withValueSerializer(String valueSerializer) {
+            this.valueSerializer = valueSerializer;
+            return this;
+        }
+
+        @Override
+        public Builder withConfigMap(Map<String, Object> configMap) {
+            this.configMap = configMap;
+            return this;
+        }
+
+        @Override
+        public KafkaTelemetryConfig build() {
+            checkNotNull(address, "Kafka server address cannot be null");
+            checkNotNull(keySerializer, "Kafka key serializer cannot be null");
+            checkNotNull(valueSerializer, "Kafka value serializer cannot be null");
+
+            return new DefaultKafkaTelemetryConfig(address, port, retries,
+                                requiredAcks, batchSize, lingerMs, memoryBuffer,
+                                keySerializer, valueSerializer, configMap);
+        }
+    }
+}
diff --git a/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultRestTelemetryConfig.java b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultRestTelemetryConfig.java
new file mode 100644
index 0000000..b11b14e
--- /dev/null
+++ b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/config/DefaultRestTelemetryConfig.java
@@ -0,0 +1,181 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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 org.onosproject.openstacktelemetry.config;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Maps;
+import org.onosproject.openstacktelemetry.api.config.RestTelemetryConfig;
+
+import java.util.Map;
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * A configuration file contains REST telemetry parameters.
+ */
+public final class DefaultRestTelemetryConfig implements RestTelemetryConfig {
+
+    private final String address;
+    private final int port;
+    private final String endpoint;
+    private final String method;
+    private final String requestMediaType;
+    private final String responseMediaType;
+    private final Map<String, Object> configMap;
+
+    private DefaultRestTelemetryConfig(String address, int port, String endpoint,
+                                       String method, String requestMediaType,
+                                       String responseMediaType,
+                                       Map<String, Object> configMap) {
+        this.address = address;
+        this.port = port;
+        this.endpoint = endpoint;
+        this.method = method;
+        this.requestMediaType = requestMediaType;
+        this.responseMediaType = responseMediaType;
+        this.configMap = configMap;
+    }
+
+    @Override
+    public String address() {
+        return address;
+    }
+
+    @Override
+    public int port() {
+        return port;
+    }
+
+    @Override
+    public String endpoint() {
+        return endpoint;
+    }
+
+    @Override
+    public String method() {
+        return method;
+    }
+
+    @Override
+    public String requestMediaType() {
+        return requestMediaType;
+    }
+
+    @Override
+    public String responseMediaType() {
+        return responseMediaType;
+    }
+
+    @Override
+    public Map<String, Object> configMap() {
+        if (configMap != null) {
+            return ImmutableMap.copyOf(configMap);
+        } else {
+            return Maps.newConcurrentMap();
+        }
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+
+        if (obj instanceof DefaultRestTelemetryConfig) {
+            final DefaultRestTelemetryConfig other = (DefaultRestTelemetryConfig) obj;
+            return Objects.equals(this.address, other.address) &&
+                    Objects.equals(this.port, other.port) &&
+                    Objects.equals(this.endpoint, other.endpoint) &&
+                    Objects.equals(this.method, other.method) &&
+                    Objects.equals(this.requestMediaType, other.requestMediaType) &&
+                    Objects.equals(this.responseMediaType, other.responseMediaType) &&
+                    Objects.equals(this.configMap, other.configMap);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(address, port, endpoint, method, requestMediaType,
+                responseMediaType, configMap);
+    }
+
+    /**
+     * Builder class of DefaultRestTelemetryConfig.
+     */
+    public final class DefaultBuilder implements Builder {
+
+        private String address;
+        private int port;
+        private String endpoint;
+        private String method;
+        private String requestMediaType;
+        private String responseMediaType;
+        private Map<String, Object> configMap;
+
+        @Override
+        public Builder withAddress(String address) {
+            this.address = address;
+            return this;
+        }
+
+        @Override
+        public Builder withPort(int port) {
+            this.port = port;
+            return this;
+        }
+
+        @Override
+        public Builder withEndpoint(String endpoint) {
+            this.endpoint = endpoint;
+            return this;
+        }
+
+        @Override
+        public Builder withMethod(String method) {
+            this.method = method;
+            return this;
+        }
+
+        @Override
+        public Builder withRequestMediaType(String mediaType) {
+            this.requestMediaType = mediaType;
+            return this;
+        }
+
+        @Override
+        public Builder withResponseMediaType(String mediaType) {
+            this.responseMediaType = mediaType;
+            return this;
+        }
+
+        @Override
+        public Builder withConfigMap(Map<String, Object> configMap) {
+            this.configMap = configMap;
+            return this;
+        }
+
+        @Override
+        public RestTelemetryConfig build() {
+            checkNotNull(address, "REST server address cannot be null");
+            checkNotNull(endpoint, "REST server endpoint cannot be null");
+
+            return new DefaultRestTelemetryConfig(address, port, endpoint,
+                    method, requestMediaType, responseMediaType, configMap);
+        }
+    }
+}