YARN-9048. Add znode hierarchy in Federation ZK State Store. (#6016)
This commit is contained in:
slfan1989
GitHub
parent
594e9f29f5
commit
b00d605832
@ -26,6 +26,8 @@
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import java.util.ArrayList;
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import java.util.Calendar;
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import java.util.List;
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import java.util.Map;
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import java.util.HashMap;
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import java.util.TimeZone;
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import java.util.Comparator;
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import java.util.stream.Collectors;
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@ -111,6 +113,7 @@
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import org.apache.hadoop.yarn.util.Clock;
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import org.apache.hadoop.yarn.util.Records;
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import org.apache.hadoop.yarn.util.SystemClock;
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import org.apache.zookeeper.KeeperException;
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import org.apache.zookeeper.data.ACL;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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@ -131,8 +134,16 @@
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* | |----- SC1
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* | |----- SC2
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* |--- APPLICATION
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* | |----- APP1
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* | |----- APP2
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* | |----- HIERARCHIES
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* | | |----- 1
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* | | | |----- (#ApplicationId barring last character)
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* | | | | | |----- APP Data
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* | | | ....
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* | | |
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* | | |----- 2
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* | | | |----- (#ApplicationId barring last 2 characters)
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* | | | | |----- (#Last 2 characters of ApplicationId)
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* | | | | | |----- APP Data
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* |--- POLICY
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* | |----- QUEUE1
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* | |----- QUEUE1
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@ -194,12 +205,19 @@ public class ZookeeperFederationStateStore implements FederationStateStore {
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private int maxAppsInStateStore;
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/** Directory to store the delegation token data. **/
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private Map<Integer, String> routerAppRootHierarchies;
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private String routerRMDTSecretManagerRoot;
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private String routerRMDTMasterKeysRootPath;
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private String routerRMDelegationTokensRootPath;
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private String routerRMSequenceNumberPath;
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private String routerRMMasterKeyIdPath;
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private int appIdNodeSplitIndex = 0;
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private final static int HIERARCHIES_LEVEL = 4;
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@VisibleForTesting
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public static final String ROUTER_APP_ROOT_HIERARCHIES = "HIERARCHIES";
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private volatile Clock clock = SystemClock.getInstance();
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protected static final Version CURRENT_VERSION_INFO = Version.newInstance(1, 1);
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@ -208,6 +226,27 @@ public class ZookeeperFederationStateStore implements FederationStateStore {
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private ZKFederationStateStoreOpDurations opDurations =
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ZKFederationStateStoreOpDurations.getInstance();
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/*
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* Indicates different app attempt state store operations.
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*/
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private enum AppAttemptOp {
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STORE,
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UPDATE,
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REMOVE
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};
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/**
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* Encapsulates full app node path and corresponding split index.
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*/
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private final static class AppNodeSplitInfo {
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private final String path;
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private final int splitIndex;
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AppNodeSplitInfo(String path, int splitIndex) {
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this.path = path;
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this.splitIndex = splitIndex;
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}
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}
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@Override
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public void init(Configuration conf) throws YarnException {
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@ -234,6 +273,23 @@ public void init(Configuration conf) throws YarnException {
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reservationsZNode = getNodePath(baseZNode, ROOT_ZNODE_NAME_RESERVATION);
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versionNode = getNodePath(baseZNode, ROOT_ZNODE_NAME_VERSION);
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String hierarchiesPath = getNodePath(appsZNode, ROUTER_APP_ROOT_HIERARCHIES);
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routerAppRootHierarchies = new HashMap<>();
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routerAppRootHierarchies.put(0, appsZNode);
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for (int splitIndex = 1; splitIndex <= HIERARCHIES_LEVEL; splitIndex++) {
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routerAppRootHierarchies.put(splitIndex,
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getNodePath(hierarchiesPath, Integer.toString(splitIndex)));
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}
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appIdNodeSplitIndex = conf.getInt(YarnConfiguration.ZK_APPID_NODE_SPLIT_INDEX,
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YarnConfiguration.DEFAULT_ZK_APPID_NODE_SPLIT_INDEX);
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if (appIdNodeSplitIndex < 1 || appIdNodeSplitIndex > HIERARCHIES_LEVEL) {
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LOG.info("Invalid value {} for config {} specified. Resetting it to {}",
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appIdNodeSplitIndex, YarnConfiguration.ZK_APPID_NODE_SPLIT_INDEX,
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YarnConfiguration.DEFAULT_ZK_APPID_NODE_SPLIT_INDEX);
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appIdNodeSplitIndex = YarnConfiguration.DEFAULT_ZK_APPID_NODE_SPLIT_INDEX;
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}
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// delegation token znodes
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routerRMDTSecretManagerRoot = getNodePath(baseZNode, ROUTER_RM_DT_SECRET_MANAGER_ROOT);
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routerRMDTMasterKeysRootPath = getNodePath(routerRMDTSecretManagerRoot,
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@ -250,6 +306,12 @@ public void init(Configuration conf) throws YarnException {
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List<ACL> zkAcl = ZKCuratorManager.getZKAcls(conf);
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zkManager.createRootDirRecursively(membershipZNode, zkAcl);
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zkManager.createRootDirRecursively(appsZNode, zkAcl);
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zkManager.createRootDirRecursively(
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getNodePath(appsZNode, ROUTER_APP_ROOT_HIERARCHIES));
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for (int splitIndex = 1; splitIndex <= HIERARCHIES_LEVEL; splitIndex++) {
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zkManager.createRootDirRecursively(
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routerAppRootHierarchies.get(splitIndex));
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}
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zkManager.createRootDirRecursively(policiesZNode, zkAcl);
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zkManager.createRootDirRecursively(reservationsZNode, zkAcl);
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zkManager.createRootDirRecursively(routerRMDTSecretManagerRoot, zkAcl);
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@ -320,6 +382,21 @@ public void close() throws Exception {
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}
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}
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/**
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* Register the home {@code SubClusterId} of the newly submitted
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* {@code ApplicationId}. Currently response is empty if the operation was
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* successful, if not an exception reporting reason for a failure. If a
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* mapping for the application already existed, the {@code SubClusterId} in
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* this response will return the existing mapping which might be different
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* from that in the {@code AddApplicationHomeSubClusterRequest}.
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*
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* @param request the request to register a new application with its home sub-cluster.
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* @return upon successful registration of the application in the StateStore,
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* {@code AddApplicationHomeSubClusterRequest} containing the home
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* sub-cluster of the application. Otherwise, an exception reporting
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* reason for a failure.
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* @throws YarnException indicates exceptions from yarn servers.
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*/
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@Override
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public AddApplicationHomeSubClusterResponse addApplicationHomeSubCluster(
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AddApplicationHomeSubClusterRequest request) throws YarnException {
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@ -367,6 +444,17 @@ public AddApplicationHomeSubClusterResponse addApplicationHomeSubCluster(
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throw new YarnException("Cannot addApplicationHomeSubCluster by request");
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}
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/**
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* Update the home {@code SubClusterId} of a previously submitted
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* {@code ApplicationId}. Currently response is empty if the operation was
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* successful, if not an exception reporting reason for a failure.
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*
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* @param request the request to update the home sub-cluster of an
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* application.
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* @return empty on successful update of the application in the StateStore, if
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* not an exception reporting reason for a failure
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* @throws YarnException indicates exceptions from yarn servers.
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*/
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@Override
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public UpdateApplicationHomeSubClusterResponse updateApplicationHomeSubCluster(
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UpdateApplicationHomeSubClusterRequest request) throws YarnException {
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@ -402,6 +490,15 @@ public UpdateApplicationHomeSubClusterResponse updateApplicationHomeSubCluster(
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return UpdateApplicationHomeSubClusterResponse.newInstance();
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}
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/**
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* Get information about the application identified by the input
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* {@code ApplicationId}.
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*
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* @param request contains the application queried
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* @return {@code ApplicationHomeSubCluster} containing the application's home
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* subcluster
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* @throws YarnException indicates exceptions from yarn servers.
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*/
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@Override
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public GetApplicationHomeSubClusterResponse getApplicationHomeSubCluster(
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GetApplicationHomeSubClusterRequest request) throws YarnException {
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@ -437,6 +534,14 @@ public GetApplicationHomeSubClusterResponse getApplicationHomeSubCluster(
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subClusterId, createTime);
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}
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/**
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* Get the {@code ApplicationHomeSubCluster} list representing the mapping of
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* all submitted applications to it's home sub-cluster.
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*
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* @param request empty representing all applications
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* @return the mapping of all submitted application to it's home sub-cluster
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* @throws YarnException indicates exceptions from yarn servers.
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*/
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@Override
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public GetApplicationsHomeSubClusterResponse getApplicationsHomeSubCluster(
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GetApplicationsHomeSubClusterRequest request) throws YarnException {
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@ -448,9 +553,7 @@ public GetApplicationsHomeSubClusterResponse getApplicationsHomeSubCluster(
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try {
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long start = clock.getTime();
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SubClusterId requestSC = request.getSubClusterId();
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List<String> children = zkManager.getChildren(appsZNode);
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List<ApplicationHomeSubCluster> result = children.stream()
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.map(child -> generateAppHomeSC(child))
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List<ApplicationHomeSubCluster> result = loadRouterApplications().stream()
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.sorted(Comparator.comparing(ApplicationHomeSubCluster::getCreateTime).reversed())
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.filter(appHomeSC -> filterHomeSubCluster(requestSC, appHomeSC.getHomeSubCluster()))
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.limit(maxAppsInStateStore)
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@ -467,48 +570,51 @@ public GetApplicationsHomeSubClusterResponse getApplicationsHomeSubCluster(
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throw new YarnException("Cannot get app by request");
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}
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private ApplicationHomeSubCluster generateAppHomeSC(String appId) {
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try {
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// Parse ApplicationHomeSubCluster
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ApplicationId applicationId = ApplicationId.fromString(appId);
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ApplicationHomeSubCluster zkStoreApplicationHomeSubCluster =
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getApplicationHomeSubCluster(applicationId);
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// Prepare to return data
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SubClusterId subClusterId = zkStoreApplicationHomeSubCluster.getHomeSubCluster();
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ApplicationHomeSubCluster resultApplicationHomeSubCluster =
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ApplicationHomeSubCluster.newInstance(applicationId, subClusterId);
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return resultApplicationHomeSubCluster;
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} catch (Exception ex) {
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LOG.error("get homeSubCluster by appId = {}.", appId, ex);
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}
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return null;
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}
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/**
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* Delete the mapping of home {@code SubClusterId} of a previously submitted
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* {@code ApplicationId}. Currently response is empty if the operation was
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* successful, if not an exception reporting reason for a failure.
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*
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* @param request the request to delete the home sub-cluster of an
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* application.
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* @return empty on successful update of the application in the StateStore, if
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* not an exception reporting reason for a failure
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* @throws YarnException if the request is invalid/fails
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*/
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@Override
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public DeleteApplicationHomeSubClusterResponse
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deleteApplicationHomeSubCluster(
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DeleteApplicationHomeSubClusterRequest request)
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throws YarnException {
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public DeleteApplicationHomeSubClusterResponse deleteApplicationHomeSubCluster(
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DeleteApplicationHomeSubClusterRequest request) throws YarnException {
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long start = clock.getTime();
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FederationApplicationHomeSubClusterStoreInputValidator.validate(request);
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ApplicationId appId = request.getApplicationId();
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String appZNode = getNodePath(appsZNode, appId.toString());
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String appIdRemovePath = getLeafAppIdNodePath(appId.toString(), false);
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int splitIndex = appIdNodeSplitIndex;
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boolean exists = false;
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boolean exists = true;
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try {
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exists = zkManager.exists(appZNode);
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if (!exists(appIdRemovePath)) {
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AppNodeSplitInfo alternatePathInfo = getAlternatePath(appId.toString());
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if (alternatePathInfo != null) {
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appIdRemovePath = alternatePathInfo.path;
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splitIndex = alternatePathInfo.splitIndex;
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} else {
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exists = false;
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}
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}
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} catch (Exception e) {
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String errMsg = "Cannot check app: " + e.getMessage();
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FederationStateStoreUtils.logAndThrowStoreException(LOG, errMsg);
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}
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if (!exists) {
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String errMsg = "Application " + appId + " does not exist";
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FederationStateStoreUtils.logAndThrowStoreException(LOG, errMsg);
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}
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try {
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zkManager.delete(appZNode);
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zkManager.delete(appIdRemovePath);
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// Check if we should remove the parent app node as well.
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checkRemoveParentAppNode(appIdRemovePath, splitIndex);
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} catch (Exception e) {
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String errMsg = "Cannot delete app: " + e.getMessage();
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FederationStateStoreUtils.logAndThrowStoreException(LOG, errMsg);
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@ -730,11 +836,12 @@ public void storeVersion() throws Exception {
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*
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* @param appId Application identifier.
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* @return ApplicationHomeSubCluster identifier.
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* @throws Exception If it cannot contact ZooKeeper.
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* @throws YarnException If it cannot contact ZooKeeper.
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*/
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private ApplicationHomeSubCluster getApplicationHomeSubCluster(
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final ApplicationId appId) throws YarnException {
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String appZNode = getNodePath(appsZNode, appId.toString());
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final ApplicationId appId) throws YarnException{
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String appZNode = getLeafAppIdNodePath(appId.toString(), false);
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ApplicationHomeSubCluster appHomeSubCluster = null;
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byte[] data = get(appZNode);
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@ -761,11 +868,44 @@ private ApplicationHomeSubCluster getApplicationHomeSubCluster(
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private void storeOrUpdateApplicationHomeSubCluster(final ApplicationId applicationId,
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final ApplicationHomeSubCluster applicationHomeSubCluster, boolean update)
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throws YarnException {
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String appZNode = getNodePath(appsZNode, applicationId.toString());
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try {
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ApplicationHomeSubClusterProto proto =
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((ApplicationHomeSubClusterPBImpl) applicationHomeSubCluster).getProto();
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byte[] data = proto.toByteArray();
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put(appZNode, data, update);
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if (update) {
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updateApplicationStateInternal(applicationId, data);
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} else {
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storeApplicationStateInternal(applicationId, data);
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}
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} catch (Exception e) {
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throw new YarnException(e);
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}
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}
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protected void storeApplicationStateInternal(final ApplicationId applicationId, byte[] data)
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throws Exception {
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String nodeCreatePath = getLeafAppIdNodePath(applicationId.toString(), true);
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LOG.debug("Storing info for app: {} at: {}.", applicationId, nodeCreatePath);
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put(nodeCreatePath, data, false);
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}
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protected void updateApplicationStateInternal(final ApplicationId applicationId, byte[] data)
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throws Exception {
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String nodeUpdatePath = getLeafAppIdNodePath(applicationId.toString(), false);
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if (!exists(nodeUpdatePath)) {
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AppNodeSplitInfo alternatePathInfo = getAlternatePath(applicationId.toString());
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if (alternatePathInfo != null) {
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nodeUpdatePath = alternatePathInfo.path;
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} else if (appIdNodeSplitIndex != 0) {
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// No alternate path exists. Create path as per configured split index.
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String rootNode = getSplitAppNodeParent(nodeUpdatePath, appIdNodeSplitIndex);
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if (!exists(rootNode)) {
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zkManager.create(rootNode);
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}
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}
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}
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LOG.debug("Storing final state info for app: {} at: {}.", applicationId, nodeUpdatePath);
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put(nodeUpdatePath, data, true);
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}
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/**
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@ -1674,4 +1814,198 @@ public int incrementCurrentKeyId() {
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}
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return keyIdSeqCounter.getCount();
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}
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/**
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* Get parent app node path based on full path and split index supplied.
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* @param appIdPath App id path for which parent needs to be returned.
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* @param splitIndex split index.
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* @return parent app node path.
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*/
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private String getSplitAppNodeParent(String appIdPath, int splitIndex) {
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// Calculated as string upto index (appIdPath Length - split index - 1). We
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// deduct 1 to exclude path separator.
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return appIdPath.substring(0, appIdPath.length() - splitIndex - 1);
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}
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/**
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* Checks if parent app node has no leaf nodes and if it does not have,
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* removes it. Called while removing application.
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*
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* @param appIdPath path of app id to be removed.
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* @param splitIndex split index.
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* @throws Exception if any problem occurs while performing ZK operation.
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*/
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private void checkRemoveParentAppNode(String appIdPath, int splitIndex)
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throws Exception {
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if (splitIndex == 0) {
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return;
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}
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String parentAppNode = getSplitAppNodeParent(appIdPath, splitIndex);
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List<String> children;
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try {
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children = getChildren(parentAppNode);
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} catch (KeeperException.NoNodeException ke) {
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// It should be fine to swallow this exception as the parent app node we
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// intend to delete is already deleted.
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LOG.debug("Unable to remove app parent node {} as it does not exist.",
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parentAppNode);
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return;
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}
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// If children==null or children is not empty, we cannot delete the parent path.
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if (children == null || !children.isEmpty()) {
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return;
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}
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// No apps stored under parent path.
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try {
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zkManager.delete(parentAppNode);
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LOG.debug("No leaf app node exists. Removing parent node {}.", parentAppNode);
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} catch (KeeperException.NotEmptyException ke) {
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// It should be fine to swallow this exception as the parent app node
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// has to be deleted only if it has no children. And this node has.
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LOG.debug("Unable to remove app parent node {} as it has children.",
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parentAppNode);
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}
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}
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List<String> getChildren(final String path) throws Exception {
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return zkManager.getChildren(path);
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}
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/**
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* Get alternate path for app id if path according to configured split index
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* does not exist. We look for path based on all possible split indices.
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* @param appId
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* @return a {@link AppNodeSplitInfo} object containing the path and split
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* index if it exists, null otherwise.
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* @throws Exception if any problem occurs while performing ZK operation.
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*/
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private AppNodeSplitInfo getAlternatePath(String appId) throws Exception {
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for (Map.Entry<Integer, String> entry : routerAppRootHierarchies.entrySet()) {
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// Look for other paths
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int splitIndex = entry.getKey();
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if (splitIndex != appIdNodeSplitIndex) {
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String alternatePath =
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getLeafAppIdNodePath(appId, entry.getValue(), splitIndex, false);
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if (exists(alternatePath)) {
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return new AppNodeSplitInfo(alternatePath, splitIndex);
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}
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}
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}
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return null;
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}
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/**
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* Returns leaf app node path based on app id and passed split index. If the
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* passed flag createParentIfNotExists is true, also creates the parent app
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* node if it does not exist.
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* @param appId application id.
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* @param rootNode app root node based on split index.
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* @param appIdNodeSplitIdx split index.
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* @param createParentIfNotExists flag which determines if parent app node
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* needs to be created(as per split) if it does not exist.
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* @return leaf app node path.
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* @throws Exception if any problem occurs while performing ZK operation.
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*/
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private String getLeafAppIdNodePath(String appId, String rootNode,
|
||||
int appIdNodeSplitIdx, boolean createParentIfNotExists) throws Exception {
|
||||
if (appIdNodeSplitIdx == 0) {
|
||||
return getNodePath(rootNode, appId);
|
||||
}
|
||||
String nodeName = appId;
|
||||
int splitIdx = nodeName.length() - appIdNodeSplitIdx;
|
||||
String rootNodePath = getNodePath(rootNode, nodeName.substring(0, splitIdx));
|
||||
if (createParentIfNotExists && !exists(rootNodePath)) {
|
||||
try {
|
||||
zkManager.create(rootNodePath);
|
||||
} catch (KeeperException.NodeExistsException e) {
|
||||
LOG.debug("Unable to create app parent node {} as it already exists.", rootNodePath);
|
||||
}
|
||||
}
|
||||
return getNodePath(rootNodePath, nodeName.substring(splitIdx));
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns leaf app node path based on app id and configured split index. If
|
||||
* the passed flag createParentIfNotExists is true, also creates the parent
|
||||
* app node if it does not exist.
|
||||
* @param appId application id.
|
||||
* @param createParentIfNotExists flag which determines if parent app node
|
||||
* needs to be created(as per split) if it does not exist.
|
||||
* @return leaf app node path.
|
||||
* @throws YarnException if any problem occurs while performing ZK operation.
|
||||
*/
|
||||
private String getLeafAppIdNodePath(String appId,
|
||||
boolean createParentIfNotExists) throws YarnException {
|
||||
try {
|
||||
String rootNode = routerAppRootHierarchies.get(appIdNodeSplitIndex);
|
||||
return getLeafAppIdNodePath(appId, rootNode, appIdNodeSplitIndex, createParentIfNotExists);
|
||||
} catch (Exception e) {
|
||||
throw new YarnException(e);
|
||||
}
|
||||
}
|
||||
|
||||
private ApplicationHomeSubCluster loadRouterAppStateFromAppNode(String appNodePath)
|
||||
throws Exception {
|
||||
byte[] data = get(appNodePath);
|
||||
LOG.debug("Loading application from znode: {}", appNodePath);
|
||||
ApplicationHomeSubCluster appHomeSubCluster = null;
|
||||
|
||||
if (data == null) {
|
||||
return appHomeSubCluster;
|
||||
}
|
||||
|
||||
try {
|
||||
appHomeSubCluster = new ApplicationHomeSubClusterPBImpl(
|
||||
ApplicationHomeSubClusterProto.parseFrom(data));
|
||||
} catch (InvalidProtocolBufferException e) {
|
||||
String errMsg = "Cannot parse application at " + appNodePath;
|
||||
FederationStateStoreUtils.logAndThrowStoreException(LOG, errMsg);
|
||||
}
|
||||
|
||||
return appHomeSubCluster;
|
||||
}
|
||||
|
||||
private List<ApplicationHomeSubCluster> loadRouterApplications() throws Exception {
|
||||
List<ApplicationHomeSubCluster> applicationHomeSubClusters = new ArrayList<>();
|
||||
for (int splitIndex = 0; splitIndex <= 4; splitIndex++) {
|
||||
String appRoot = routerAppRootHierarchies.get(splitIndex);
|
||||
if (appRoot == null) {
|
||||
continue;
|
||||
}
|
||||
List<String> childNodes = getChildren(appRoot);
|
||||
boolean appNodeFound = false;
|
||||
for (String childNodeName : childNodes) {
|
||||
if (childNodeName.startsWith(ApplicationId.appIdStrPrefix)) {
|
||||
appNodeFound = true;
|
||||
if (splitIndex == 0) {
|
||||
ApplicationHomeSubCluster applicationHomeSubCluster =
|
||||
loadRouterAppStateFromAppNode(getNodePath(appRoot, childNodeName));
|
||||
applicationHomeSubClusters.add(applicationHomeSubCluster);
|
||||
} else {
|
||||
// If AppId Node is partitioned.
|
||||
String parentNodePath = getNodePath(appRoot, childNodeName);
|
||||
List<String> leafNodes = getChildren(parentNodePath);
|
||||
for (String leafNodeName : leafNodes) {
|
||||
ApplicationHomeSubCluster applicationHomeSubCluster =
|
||||
loadRouterAppStateFromAppNode(getNodePath(parentNodePath, leafNodeName));
|
||||
applicationHomeSubClusters.add(applicationHomeSubCluster);
|
||||
}
|
||||
}
|
||||
} else if (!childNodeName.equals(ROUTER_APP_ROOT_HIERARCHIES)){
|
||||
LOG.debug("Unknown child node with name {} under {}.", childNodeName, appRoot);
|
||||
}
|
||||
}
|
||||
if (splitIndex != appIdNodeSplitIndex && !appNodeFound) {
|
||||
// If no loaded app exists for a particular split index and the split
|
||||
// index for which apps are being loaded is not the one configured, then
|
||||
// we do not need to keep track of this hierarchy for storing/updating/
|
||||
// removing app/app attempt znodes.
|
||||
routerAppRootHierarchies.remove(splitIndex);
|
||||
}
|
||||
}
|
||||
return applicationHomeSubClusters;
|
||||
}
|
||||
}
|
||||
@ -0,0 +1,22 @@
|
||||
<?xml version="1.0" encoding="UTF-8"?>
|
||||
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
|
||||
<!--
|
||||
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. See accompanying LICENSE file.
|
||||
-->
|
||||
|
||||
<configuration>
|
||||
<property>
|
||||
<name>yarn.resourcemanager.zk-appid-node.split-index</name>
|
||||
<value>1</value>
|
||||
</property>
|
||||
</configuration>
|
||||
Loading…
Reference in New Issue
Block a user