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@@ -49,6 +49,7 @@ import org.apache.hadoop.hdfs.NameNodeProxies;
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import org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol;
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import org.apache.hadoop.hdfs.protocol.ClientProtocol;
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import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
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+import org.apache.hadoop.hdfs.protocol.DatanodeLocalInfo;
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import org.apache.hadoop.hdfs.protocol.HdfsConstants;
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import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
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import org.apache.hadoop.hdfs.protocol.HdfsConstants.RollingUpgradeAction;
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@@ -645,6 +646,8 @@ public class DFSAdmin extends FsShell {
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"\t[-fetchImage <local directory>]\n" +
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"\t[-allowSnapshot <snapshotDir>]\n" +
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"\t[-disallowSnapshot <snapshotDir>]\n" +
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+ "\t[-shutdownDatanode <datanode_host:ipc_port> [upgrade]]\n" +
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+ "\t[-getDatanodeInfo <datanode_host:ipc_port>\n" +
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"\t[-help [cmd]]\n";
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String report ="-report: \tReports basic filesystem information and statistics.\n";
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@@ -741,6 +744,18 @@ public class DFSAdmin extends FsShell {
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String disallowSnapshot = "-disallowSnapshot <snapshotDir>:\n" +
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"\tDo not allow snapshots to be taken on a directory any more.\n";
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+
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+ String shutdownDatanode = "-shutdownDatanode <datanode_host:ipc_port> [upgrade]\n" +
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+ "\tShut down the datanode. If an optional argument \"upgrade\" is\n" +
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+ "\tpassed, the clients will be advised to wait for the datanode to\n" +
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+ "\trestart and the fast start-up mode will be enabled. Clients will\n" +
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+ "\ttimeout and ignore the datanode, if the restart does not happen\n" +
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+ "\tin time. The fast start-up mode will also be disabled, if restart\n" +
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+ "\tis delayed too much.\n";
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+
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+ String getDatanodeInfo = "-getDatanodeInfo <datanode_host:ipc_port>\n" +
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+ "\tCheck the datanode for liveness. If the datanode responds,\n" +
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+ "\timore information about the datanode is printed.\n";
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String help = "-help [cmd]: \tDisplays help for the given command or all commands if none\n" +
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"\t\tis specified.\n";
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@@ -791,6 +806,10 @@ public class DFSAdmin extends FsShell {
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System.out.println(allowSnapshot);
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} else if ("disallowSnapshot".equalsIgnoreCase(cmd)) {
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System.out.println(disallowSnapshot);
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+ } else if ("shutdownDatanode".equalsIgnoreCase(cmd)) {
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+ System.out.println(shutdownDatanode);
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+ } else if ("getDatanodeInfo".equalsIgnoreCase(cmd)) {
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+ System.out.println(getDatanodeInfo);
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} else if ("help".equals(cmd)) {
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System.out.println(help);
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} else {
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@@ -818,6 +837,8 @@ public class DFSAdmin extends FsShell {
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System.out.println(fetchImage);
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System.out.println(allowSnapshot);
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System.out.println(disallowSnapshot);
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+ System.out.println(shutdownDatanode);
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+ System.out.println(getDatanodeInfo);
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System.out.println(help);
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System.out.println();
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ToolRunner.printGenericCommandUsage(System.out);
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@@ -1100,6 +1121,8 @@ public class DFSAdmin extends FsShell {
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System.err.println(" ["+ClearSpaceQuotaCommand.USAGE+"]");
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System.err.println(" [-setBalancerBandwidth <bandwidth in bytes per second>]");
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System.err.println(" [-fetchImage <local directory>]");
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+ System.err.println(" [-shutdownDatanode <datanode_host:ipc_port> [upgrade]]");
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+ System.err.println(" [-getDatanodeInfo <datanode_host:ipc_port>]");
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System.err.println(" [-help [cmd]]");
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System.err.println();
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ToolRunner.printGenericCommandUsage(System.err);
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@@ -1216,6 +1239,16 @@ public class DFSAdmin extends FsShell {
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printUsage(cmd);
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return exitCode;
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}
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+ } else if ("-shutdownDatanode".equals(cmd)) {
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+ if ((argv.length != 2) && (argv.length != 3)) {
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+ printUsage(cmd);
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+ return exitCode;
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+ }
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+ } else if ("-getDatanodeInfo".equals(cmd)) {
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+ if (argv.length != 2) {
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+ printUsage(cmd);
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+ return exitCode;
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+ }
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}
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// initialize DFSAdmin
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@@ -1279,6 +1312,10 @@ public class DFSAdmin extends FsShell {
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exitCode = setBalancerBandwidth(argv, i);
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} else if ("-fetchImage".equals(cmd)) {
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exitCode = fetchImage(argv, i);
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+ } else if ("-shutdownDatanode".equals(cmd)) {
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+ exitCode = shutdownDatanode(argv, i);
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+ } else if ("-getDatanodeInfo".equals(cmd)) {
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+ exitCode = getDatanodeInfo(argv, i);
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} else if ("-help".equals(cmd)) {
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if (i < argv.length) {
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printHelp(argv[i]);
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@@ -1363,6 +1400,33 @@ public class DFSAdmin extends FsShell {
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return 0;
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}
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+ private int shutdownDatanode(String[] argv, int i) throws IOException {
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+ ClientDatanodeProtocol dnProxy = getDataNodeProxy(argv[i]);
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+ boolean upgrade = false;
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+ if (argv.length-1 == i+1) {
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+ if ("upgrade".equals(argv[i+1])) {
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+ upgrade = true;
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+ } else {
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+ printUsage("-shutdownDatanode");
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+ return -1;
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+ }
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+ }
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+ dnProxy.shutdownDatanode(upgrade);
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+ return 0;
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+ }
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+
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+ private int getDatanodeInfo(String[] argv, int i) throws IOException {
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+ ClientDatanodeProtocol dnProxy = getDataNodeProxy(argv[i]);
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+ try {
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+ DatanodeLocalInfo dnInfo = dnProxy.getDatanodeInfo();
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+ System.out.println(dnInfo.getDatanodeLocalReport());
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+ } catch (IOException ioe) {
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+ System.err.println("Datanode unreachable.");
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+ return -1;
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+ }
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+ return 0;
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+ }
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+
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/**
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* main() has some simple utility methods.
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* @param argv Command line parameters.
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Kihwal Lee