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RatisHelper.java
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RatisHelper.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.hadoop.hdds.ratis;
import java.io.IOException;
import java.security.cert.X509Certificate;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdds.protocol.DatanodeDetails;
import org.apache.hadoop.hdds.scm.ScmConfigKeys;
import org.apache.hadoop.hdds.scm.pipeline.Pipeline;
import org.apache.hadoop.hdds.security.x509.SecurityConfig;
import org.apache.hadoop.ozone.OzoneConfigKeys;
import org.apache.ratis.RaftConfigKeys;
import org.apache.ratis.client.RaftClient;
import org.apache.ratis.client.RaftClientConfigKeys;
import org.apache.ratis.conf.RaftProperties;
import org.apache.ratis.grpc.GrpcConfigKeys;
import org.apache.ratis.grpc.GrpcFactory;
import org.apache.ratis.grpc.GrpcTlsConfig;
import org.apache.ratis.proto.RaftProtos;
import org.apache.ratis.protocol.RaftGroup;
import org.apache.ratis.protocol.RaftGroupId;
import org.apache.ratis.protocol.RaftPeer;
import org.apache.ratis.protocol.RaftPeerId;
import org.apache.ratis.retry.RetryPolicies;
import org.apache.ratis.retry.RetryPolicy;
import org.apache.ratis.rpc.RpcType;
import org.apache.ratis.rpc.SupportedRpcType;
import org.apache.ratis.server.RaftServerConfigKeys;
import org.apache.ratis.thirdparty.com.google.protobuf.ByteString;
import org.apache.ratis.util.TimeDuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Ratis helper methods.
*/
public interface RatisHelper {
Logger LOG = LoggerFactory.getLogger(RatisHelper.class);
// Prefix for Ratis Server GRPC and Ratis client conf.
String HDDS_DATANODE_RATIS_PREFIX_KEY = "hdds.ratis.";
String HDDS_DATANODE_RATIS_SERVER_PREFIX_KEY =
HDDS_DATANODE_RATIS_PREFIX_KEY + RaftServerConfigKeys.PREFIX;
String HDDS_DATANODE_RATIS_CLIENT_PREFIX_KEY =
HDDS_DATANODE_RATIS_PREFIX_KEY + RaftClientConfigKeys.PREFIX;
String HDDS_DATANODE_RATIS_GRPC_PREFIX_KEY =
HDDS_DATANODE_RATIS_PREFIX_KEY + GrpcConfigKeys.PREFIX;
static String toRaftPeerIdString(DatanodeDetails id) {
return id.getUuidString();
}
static UUID toDatanodeId(String peerIdString) {
return UUID.fromString(peerIdString);
}
static UUID toDatanodeId(RaftPeerId peerId) {
return toDatanodeId(peerId.toString());
}
static UUID toDatanodeId(RaftProtos.RaftPeerProto peerId) {
return toDatanodeId(RaftPeerId.valueOf(peerId.getId()));
}
static String toRaftPeerAddressString(DatanodeDetails id) {
return id.getIpAddress() + ":" +
id.getPort(DatanodeDetails.Port.Name.RATIS).getValue();
}
static RaftPeerId toRaftPeerId(DatanodeDetails id) {
return RaftPeerId.valueOf(toRaftPeerIdString(id));
}
static RaftPeer toRaftPeer(DatanodeDetails id) {
return new RaftPeer(toRaftPeerId(id), toRaftPeerAddressString(id));
}
static List<RaftPeer> toRaftPeers(Pipeline pipeline) {
return toRaftPeers(pipeline.getNodes());
}
static <E extends DatanodeDetails> List<RaftPeer> toRaftPeers(
List<E> datanodes) {
return datanodes.stream().map(RatisHelper::toRaftPeer)
.collect(Collectors.toList());
}
/* TODO: use a dummy id for all groups for the moment.
* It should be changed to a unique id for each group.
*/
RaftGroupId DUMMY_GROUP_ID =
RaftGroupId.valueOf(ByteString.copyFromUtf8("AOzoneRatisGroup"));
RaftGroup EMPTY_GROUP = RaftGroup.valueOf(DUMMY_GROUP_ID,
Collections.emptyList());
static RaftGroup emptyRaftGroup() {
return EMPTY_GROUP;
}
static RaftGroup newRaftGroup(Collection<RaftPeer> peers) {
return peers.isEmpty()? emptyRaftGroup()
: RaftGroup.valueOf(DUMMY_GROUP_ID, peers);
}
static RaftGroup newRaftGroup(RaftGroupId groupId,
Collection<DatanodeDetails> peers) {
final List<RaftPeer> newPeers = peers.stream()
.map(RatisHelper::toRaftPeer)
.collect(Collectors.toList());
return peers.isEmpty() ? RaftGroup.valueOf(groupId, Collections.emptyList())
: RaftGroup.valueOf(groupId, newPeers);
}
static RaftGroup newRaftGroup(Pipeline pipeline) {
return RaftGroup.valueOf(RaftGroupId.valueOf(pipeline.getId().getId()),
toRaftPeers(pipeline));
}
static RaftClient newRaftClient(RpcType rpcType, Pipeline pipeline,
RetryPolicy retryPolicy, GrpcTlsConfig tlsConfig,
Configuration ozoneConfiguration) throws IOException {
return newRaftClient(rpcType,
toRaftPeerId(pipeline.getLeaderNode()),
newRaftGroup(RaftGroupId.valueOf(pipeline.getId().getId()),
pipeline.getNodes()), retryPolicy, tlsConfig, ozoneConfiguration);
}
static RpcType getRpcType(Configuration conf) {
return SupportedRpcType.valueOfIgnoreCase(conf.get(
ScmConfigKeys.DFS_CONTAINER_RATIS_RPC_TYPE_KEY,
ScmConfigKeys.DFS_CONTAINER_RATIS_RPC_TYPE_DEFAULT));
}
static RaftClient newRaftClient(RaftPeer leader, Configuration conf) {
return newRaftClient(getRpcType(conf), leader,
RatisHelper.createRetryPolicy(conf), conf);
}
static RaftClient newRaftClient(RpcType rpcType, RaftPeer leader,
RetryPolicy retryPolicy, GrpcTlsConfig tlsConfig,
Configuration configuration) {
return newRaftClient(rpcType, leader.getId(),
newRaftGroup(Collections.singletonList(leader)), retryPolicy,
tlsConfig, configuration);
}
static RaftClient newRaftClient(RpcType rpcType, RaftPeer leader,
RetryPolicy retryPolicy,
Configuration ozoneConfiguration) {
return newRaftClient(rpcType, leader.getId(),
newRaftGroup(Collections.singletonList(leader)), retryPolicy, null,
ozoneConfiguration);
}
@SuppressWarnings("checkstyle:ParameterNumber")
static RaftClient newRaftClient(RpcType rpcType, RaftPeerId leader,
RaftGroup group, RetryPolicy retryPolicy,
GrpcTlsConfig tlsConfig, Configuration ozoneConfiguration) {
if (LOG.isTraceEnabled()) {
LOG.trace("newRaftClient: {}, leader={}, group={}",
rpcType, leader, group);
}
final RaftProperties properties = new RaftProperties();
RaftConfigKeys.Rpc.setType(properties, rpcType);
// Set the ratis client headers which are matching with regex.
createRaftClientProperties(ozoneConfiguration, properties);
RaftClient.Builder builder = RaftClient.newBuilder()
.setRaftGroup(group)
.setLeaderId(leader)
.setProperties(properties)
.setRetryPolicy(retryPolicy);
// TODO: GRPC TLS only for now, netty/hadoop RPC TLS support later.
if (tlsConfig != null && rpcType == SupportedRpcType.GRPC) {
builder.setParameters(GrpcFactory.newRaftParameters(tlsConfig));
}
return builder.build();
}
/**
* Set all the properties matching with regex
* {@link RatisHelper#HDDS_DATANODE_RATIS_PREFIX_KEY} in
* ozone configuration object and configure it to RaftProperties.
* @param ozoneConf
* @param raftProperties
*/
static void createRaftClientProperties(Configuration ozoneConf,
RaftProperties raftProperties) {
// As for client we do not require server and grpc server/tls. exclude them.
Map<String, String> ratisClientConf =
ozoneConf.getPropsWithPrefix(HDDS_DATANODE_RATIS_PREFIX_KEY);
ratisClientConf.forEach((key, val) -> {
if (!(key.startsWith(RaftServerConfigKeys.PREFIX) ||
key.startsWith(GrpcConfigKeys.TLS.PREFIX) ||
key.startsWith(GrpcConfigKeys.Server.PREFIX))) {
raftProperties.set(key, val);
}
});
}
/**
* Set all the properties matching with prefix
* {@link RatisHelper#HDDS_DATANODE_RATIS_PREFIX_KEY} in
* ozone configuration object and configure it to RaftProperties.
* @param ozoneConf
* @param raftProperties
*/
static void createRaftServerProperties(Configuration ozoneConf,
RaftProperties raftProperties) {
Map<String, String> ratisServerConf =
getDatanodeRatisPrefixProps(ozoneConf);
ratisServerConf.forEach((key, val) -> {
// Exclude ratis client configuration.
if (!key.startsWith(RaftClientConfigKeys.PREFIX)) {
raftProperties.set(key, val);
}
});
}
static Map<String, String> getDatanodeRatisPrefixProps(
Configuration configuration) {
return configuration.getPropsWithPrefix(HDDS_DATANODE_RATIS_PREFIX_KEY);
}
// For External gRPC client to server with gRPC TLS.
// No mTLS for external client as SCM CA does not issued certificates for them
static GrpcTlsConfig createTlsClientConfig(SecurityConfig conf,
X509Certificate caCert) {
GrpcTlsConfig tlsConfig = null;
if (conf.isSecurityEnabled() && conf.isGrpcTlsEnabled()) {
tlsConfig = new GrpcTlsConfig(null, null,
caCert, false);
}
return tlsConfig;
}
static RetryPolicy createRetryPolicy(Configuration conf) {
int maxRetryCount =
conf.getInt(OzoneConfigKeys.DFS_RATIS_CLIENT_REQUEST_MAX_RETRIES_KEY,
OzoneConfigKeys.
DFS_RATIS_CLIENT_REQUEST_MAX_RETRIES_DEFAULT);
long retryInterval = conf.getTimeDuration(OzoneConfigKeys.
DFS_RATIS_CLIENT_REQUEST_RETRY_INTERVAL_KEY, OzoneConfigKeys.
DFS_RATIS_CLIENT_REQUEST_RETRY_INTERVAL_DEFAULT
.toIntExact(TimeUnit.MILLISECONDS), TimeUnit.MILLISECONDS);
TimeDuration sleepDuration =
TimeDuration.valueOf(retryInterval, TimeUnit.MILLISECONDS);
RetryPolicy retryPolicy = RetryPolicies
.retryUpToMaximumCountWithFixedSleep(maxRetryCount, sleepDuration);
return retryPolicy;
}
static Long getMinReplicatedIndex(
Collection<RaftProtos.CommitInfoProto> commitInfos) {
return commitInfos.stream().map(RaftProtos.CommitInfoProto::getCommitIndex)
.min(Long::compareTo).orElse(null);
}
}