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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.core.status;
import com.yahoo.vdslib.state.ClusterState;
import com.yahoo.vespa.clustercontroller.core.*;
import com.yahoo.vespa.clustercontroller.core.Timer;
import com.yahoo.vespa.clustercontroller.core.status.statuspage.StatusPageResponse;
import com.yahoo.vespa.clustercontroller.core.status.statuspage.StatusPageServer;
import com.yahoo.vespa.clustercontroller.core.status.statuspage.VdsClusterHtmlRenderer;
import java.util.*;
/**
* @author Haakon Humberset
*/
public class LegacyIndexPageRequestHandler implements StatusPageServer.RequestHandler {
private final Timer timer;
private final ContentCluster cluster;
private final MasterElectionHandler masterElectionHandler;
private final StateVersionTracker stateVersionTracker;
private final EventLog eventLog;
private final long startedTime;
private final RunDataExtractor data;
private final boolean showLocalSystemStatesInLog;
public LegacyIndexPageRequestHandler(Timer timer, boolean showLocalSystemStatesInLog, ContentCluster cluster,
MasterElectionHandler masterElectionHandler,
StateVersionTracker stateVersionTracker,
EventLog eventLog, long startedTime, RunDataExtractor data)
{
this.timer = timer;
this.showLocalSystemStatesInLog = showLocalSystemStatesInLog;
this.cluster = cluster;
this.masterElectionHandler = masterElectionHandler;
this.stateVersionTracker = stateVersionTracker;
this.eventLog = eventLog;
this.startedTime = startedTime;
this.data = data;
}
@Override
public StatusPageResponse handle(StatusPageServer.HttpRequest request) {
TimeZone tz = TimeZone.getTimeZone("UTC");
long currentTime = timer.getCurrentTimeInMillis();
StatusPageResponse response = new StatusPageResponse();
response.setContentType("text/html");
StringBuilder content = new StringBuilder();
content.append("<!-- Answer to request " + request + " -->\n");
response.writeHtmlHeader(content, cluster.getName() + " Cluster Controller " + data.getOptions().fleetControllerIndex + " Status Page");
content.append("<p><font size=\"-1\">")
.append(" [ <a href=\"#config\">Current config</a>")
.append(" | <a href=\"#clusterstates\">Cluster states</a>")
.append(" | <a href=\"#eventlog\">Event log</a>")
.append(" ]</font></p>\n");
content.append("<table><tr><td>UTC time when creating this page:</td><td align=\"right\">").append(RealTimer.printDateNoMilliSeconds(currentTime, tz)).append("</td></tr>");
//content.append("<tr><td>Fleetcontroller version:</td><td align=\"right\">" + Vtag.V_TAG_PKG + "</td></tr/>");
content.append("<tr><td>Cluster controller uptime:</td><td align=\"right\">" + RealTimer.printDuration(currentTime - startedTime) + "</td></tr></table>");
if (masterElectionHandler.isAmongNthFirst(data.getOptions().stateGatherCount)) {
// Table overview of all the nodes
cluster.writeHtmlState(
new VdsClusterHtmlRenderer(),
content,
timer,
stateVersionTracker.getVersionedClusterStateBundle(),
stateVersionTracker.getAggregatedClusterStats(),
data.getOptions().storageDistribution,
data.getOptions(),
eventLog
);
// Current cluster state and cluster state history
writeHtmlState(stateVersionTracker, content, request);
} else {
// Overview of current config
data.getOptions().writeHtmlState(content);
}
// State of master election
masterElectionHandler.writeHtmlState(content, data.getOptions().stateGatherCount);
// Overview of current config
data.getOptions().writeHtmlState(content);
// Event log
eventLog.writeHtmlState(content, null);
response.writeHtmlFooter(content, "");
response.writeContent(content.toString());
return response;
}
public void writeHtmlState(StateVersionTracker stateVersionTracker, StringBuilder sb, StatusPageServer.HttpRequest request) {
boolean showLocal = showLocalSystemStatesInLog;
if (request.hasQueryParameter("showlocal")) {
showLocal = true;
} else if (request.hasQueryParameter("hidelocal")) {
showLocal = false;
}
sb.append("<h2 id=\"clusterstates\">Cluster states</h2>\n");
writeClusterStates(sb, stateVersionTracker.getVersionedClusterStateBundle());
if ( ! stateVersionTracker.getClusterStateHistory().isEmpty()) {
TimeZone tz = TimeZone.getTimeZone("UTC");
sb.append("<h3 id=\"clusterstatehistory\">Cluster state history</h3>\n");
sb.append("<table border=\"1\" cellspacing=\"0\"><tr>\n")
.append(" <th>Creation date (").append(tz.getDisplayName(false, TimeZone.SHORT)).append(")</th>\n")
.append(" <th>Bucket space</th>\n")
.append(" <th>Cluster state</th>\n")
.append("</tr>\n");
// Write cluster state history in descending time point order (newest on top)
for (var historyEntry : stateVersionTracker.getClusterStateHistory()) {
writeClusterStateEntry(historyEntry, sb, tz);
}
sb.append("</table>\n");
}
}
private static void writeClusterStates(StringBuilder sb, ClusterStateBundle clusterStates) {
sb.append("<p>Baseline cluster state:<br><code>").append(clusterStates.getBaselineClusterState().toString()).append("</code></p>\n");
clusterStates.getDerivedBucketSpaceStates().forEach((bucketSpace, state) -> {
sb.append("<p>" + bucketSpace + " cluster state:<br><code>").append(state.getClusterState().toString()).append("</code></p>\n");
});
}
private void writeClusterStateEntry(ClusterStateHistoryEntry entry, StringBuilder sb, TimeZone tz) {
sb.append("<tr><td rowspan=\"").append(entry.getRawStates().size()).append("\">")
.append(RealTimer.printDate(entry.time(), tz)).append("</td>");
for (var space : entry.getRawStates().keySet()) {
if (!space.equals(ClusterStateHistoryEntry.BASELINE)) { // Always ordered first
sb.append("<tr>");
}
writeClusterStateTransition(space, entry.getStateString(space), entry.getDiffString(space),
entry.getStateString(ClusterStateHistoryEntry.BASELINE),
entry.getDiffString(ClusterStateHistoryEntry.BASELINE), sb);
}
}
private void writeClusterStateTransition(String bucketSpace, String state, String diff,
String baselineState, String baselineDiff, StringBuilder sb) {
sb.append("<td align=\"center\">").append(bucketSpace).append("</td><td>");
if (!bucketSpace.equals(ClusterStateHistoryEntry.BASELINE) &&
state.equals(baselineState) && diff.equals(baselineDiff))
{
// Don't bother duplicating output for non-baseline states if they exactly match
// what's being output for the baseline state.
sb.append("<span style=\"color: gray\">(identical to baseline state)</span>");
} else {
sb.append(state);
if (!diff.isEmpty()) {
sb.append("<br><b>Diff</b>: ").append(diff);
}
}
sb.append("</td></tr>\n");
}
}
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