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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.core;
import com.yahoo.vdslib.distribution.ConfiguredNode;
import com.yahoo.vdslib.distribution.Distribution;
import com.yahoo.vdslib.state.ClusterState;
import com.yahoo.vdslib.state.Node;
import com.yahoo.vdslib.state.NodeState;
import com.yahoo.vdslib.state.State;
import com.yahoo.vespa.clustercontroller.core.listeners.NodeListener;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.requests.SetUnitStateRequest;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.TreeMap;
import static com.yahoo.vdslib.state.NodeState.ORCHESTRATOR_RESERVED_DESCRIPTION;
import static com.yahoo.vespa.clustercontroller.core.NodeStateChangeChecker.Result;
public class ContentCluster {
private static final int pollingFrequency = 5000;
private final String clusterName;
private final ClusterInfo clusterInfo = new ClusterInfo();
private final Map<Node, Long> nodeStartTimestamps = new TreeMap<>();
private final int maxNumberOfGroupsAllowedToBeDown;
private int slobrokGenerationCount = 0;
private Distribution distribution;
public ContentCluster(String clusterName, Collection<ConfiguredNode> configuredNodes, Distribution distribution) {
this(clusterName, configuredNodes, distribution, -1);
}
public ContentCluster(FleetControllerOptions options) {
this(options.clusterName(), options.nodes(), options.storageDistribution(), options.maxNumberOfGroupsAllowedToBeDown());
}
ContentCluster(String clusterName,
Collection<ConfiguredNode> configuredNodes,
Distribution distribution,
int maxNumberOfGroupsAllowedToBeDown) {
if (configuredNodes == null) throw new IllegalArgumentException("Nodes must be set");
this.clusterName = clusterName;
this.distribution = Objects.requireNonNull(distribution, "distribution must be non-null");
setNodes(configuredNodes, new NodeListener() {});
this.maxNumberOfGroupsAllowedToBeDown = maxNumberOfGroupsAllowedToBeDown;
}
public Distribution getDistribution() { return distribution; }
public void setDistribution(Distribution distribution) {
this.distribution = distribution;
for (NodeInfo info : clusterInfo.getAllNodeInfos()) {
info.setGroup(distribution);
}
}
/** Sets the configured nodes of this cluster */
public final void setNodes(Collection<ConfiguredNode> configuredNodes, NodeListener nodeListener) {
clusterInfo.setNodes(configuredNodes, this, distribution, nodeListener);
}
public void setStartTimestamp(Node n, long startTimestamp) {
nodeStartTimestamps.put(n, startTimestamp);
}
public long getStartTimestamp(Node n) {
Long value = nodeStartTimestamps.get(n);
return (value == null ? 0 : value);
}
public Map<Node, Long> getStartTimestamps() {
return nodeStartTimestamps;
}
public void clearStates() {
for (NodeInfo info : clusterInfo.getAllNodeInfos()) {
info.setReportedState(null, 0);
}
}
public boolean allStatesReported() {
return clusterInfo.allStatesReported();
}
public int getPollingFrequency() { return pollingFrequency; }
/** Returns the configured nodes of this as a read-only map indexed on node index (distribution key) */
public Map<Integer, ConfiguredNode> getConfiguredNodes() {
return clusterInfo.getConfiguredNodes();
}
public Collection<NodeInfo> getNodeInfos() {
return Collections.unmodifiableCollection(clusterInfo.getAllNodeInfos());
}
public ClusterInfo clusterInfo() { return clusterInfo; }
public String getName() { return clusterName; }
public NodeInfo getNodeInfo(Node node) { return clusterInfo.getNodeInfo(node); }
public int maxNumberOfGroupsAllowedToBeDown() { return maxNumberOfGroupsAllowedToBeDown; }
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("ContentCluster(").append(clusterName).append(") {");
for (NodeInfo node : clusterInfo.getAllNodeInfos()) {
sb.append("\n ").append(node);
}
sb.append("\n}");
return sb.toString();
}
public int getSlobrokGenerationCount() { return slobrokGenerationCount; }
public void setSlobrokGenerationCount(int count) { slobrokGenerationCount = count; }
/**
* Checks if a node can be upgraded
*
* @param node the node to be checked for upgrad
* @param clusterState the current cluster state version
* @param condition the upgrade condition
* @param oldState the old/current wanted state
* @param newState state wanted to be set
* @param inMoratorium whether the CC is in moratorium
*/
public Result calculateEffectOfNewState(
Node node, ClusterState clusterState, SetUnitStateRequest.Condition condition,
NodeState oldState, NodeState newState, boolean inMoratorium) {
NodeStateChangeChecker nodeStateChangeChecker = new NodeStateChangeChecker(this, inMoratorium);
return nodeStateChangeChecker.evaluateTransition(node, clusterState, condition, oldState, newState);
}
/** Returns the indices of the nodes that have been safely set to the given state by the Orchestrator (best guess). */
public List<Integer> nodesSafelySetTo(State state) {
return switch (state) {
// Orchestrator's ALLOWED_TO_BE_DOWN or PERMANENTLY_DOWN, respectively
case MAINTENANCE, DOWN ->
clusterInfo.getStorageNodeInfos().stream()
.filter(storageNodeInfo -> {
NodeState userWantedState = storageNodeInfo.getUserWantedState();
return userWantedState.getState() == state &&
Objects.equals(userWantedState.getDescription(), ORCHESTRATOR_RESERVED_DESCRIPTION);
})
.map(NodeInfo::getNodeIndex)
.toList();
default ->
// Note: There is no trace left if the Orchestrator sets the state to UP, so that's handled
// like any other state:
List.of();
};
}
public boolean hasConfiguredNode(int index) {
return clusterInfo.hasConfiguredNode(index);
}
}
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