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HDFS-14188. Make hdfs ec -verifyClusterSetup command accept an erasure coding policy as a parameter. Contributed by Kitti Nanasi.

Browse Source 
Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>
This commit is contained in:
Kitti Nanasi 2019-02-19 12:04:56 -08:00 committed by Wei-Chiu Chuang
parent b8de78c570
commit 14282e311b
4 changed files with 95 additions and 10 deletions
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40
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/tools/ECAdmin.java
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@ -23,6 +23,7 @@
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.RemoteIterator;
import org.apache.hadoop.fs.shell.CommandFormat;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.protocol.AddErasureCodingPolicyResponse;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
@ -612,24 +613,32 @@ public String getName() {
@Override
public String getShortUsage() {
return "[" + getName() + "]\n";
return "[" + getName() + " [-policy <policy>...<policy>]]\n";
}
@Override
public String getLongUsage() {
TableListing listing = AdminHelper.getOptionDescriptionListing();
listing.addRow("<policy>", "The name of the erasure coding policy");
return getShortUsage() + "\n"
+ "Verify the cluster setup can support all enabled erasure coding"
+ " policies.\n";
+ "Verify if the cluster setup can support all enabled erasure " +
"coding policies. If optional parameter -policy is specified, " +
"verify if the cluster setup can support the given policy.\n";
}
@Override
public int run(Configuration conf, List<String> args) throws IOException {
if (args.size() > 0) {
System.err.println(getName() + ": Too many arguments");
return 1;
}
boolean isPolicyOption = StringUtils.popOption("-policy", args);
final DistributedFileSystem dfs = AdminHelper.getDFS(conf);
ECTopologyVerifierResult result = getECTopologyVerifierResult(dfs);
ECTopologyVerifierResult result;
if (isPolicyOption) {
CommandFormat c = new CommandFormat(1, Integer.MAX_VALUE);
c.parse(args);
String[] parameters = args.toArray(new String[args.size()]);
result = getECTopologyResultForPolicies(dfs, parameters);
} else {
result = getECTopologyVerifierResult(dfs);
}
System.out.println(result.getResultMessage());
if (result.isSupported()) {
return 0;
@ -649,6 +658,21 @@ private static ECTopologyVerifierResult getECTopologyVerifierResult(
getEnabledPolicies(policies));
}
private static ECTopologyVerifierResult getECTopologyResultForPolicies(
final DistributedFileSystem dfs, final String... policyNames)
throws IOException {
ErasureCodingPolicy[] policies =
new ErasureCodingPolicy[policyNames.length];
for (int i = 0; i < policyNames.length; i++) {
policies[i] =
getPolicy(dfs.getClient().getNamenode().getErasureCodingPolicies(),
policyNames[i]);
}
final DatanodeInfo[] report = dfs.getClient().getNamenode()
.getDatanodeReport(HdfsConstants.DatanodeReportType.ALL);
return ECTopologyVerifier.getECTopologyVerifierResult(report, policies);
}
private static ECTopologyVerifierResult getECTopologyVerifierResultForPolicy(
final DistributedFileSystem dfs, final String policyName)
throws IOException {

2
hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSCommands.md
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@ -488,6 +488,7 @@ Usage:
[-listCodecs]
[-enablePolicy -policy <policyName>]
[-disablePolicy -policy <policyName>]
[-verifyClusterSetup -policy <policyName>...<policyName>]
[-help [cmd ...]]
| COMMAND\_OPTION | Description |
@ -500,6 +501,7 @@ Usage:
|-listCodecs| Get the list of supported erasure coding codecs and coders in system|
|-enablePolicy| Enable an ErasureCoding policy in system|
|-disablePolicy| Disable an ErasureCoding policy in system|
|-verifyClusterSetup| Verify if the cluster setup can support a list of erasure coding policies|
Runs the ErasureCoding CLI. See [HDFS ErasureCoding](./HDFSErasureCoding.html#Administrative_commands) for more information on this command.

5
hadoop-hdfs-project/hadoop-hdfs/src/site/markdown/HDFSErasureCoding.md
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@ -170,6 +170,7 @@ Deployment
[-listCodecs]
[-enablePolicy -policy <policyName>]
[-disablePolicy -policy <policyName>]
[-verifyClusterSetup -policy <policyName>...<policyName>]
[-help [cmd ...]]
Below are the details about each command.
@ -221,6 +222,10 @@ Below are the details about each command.
Disable an erasure coding policy.
* `[-verifyClusterSetup -policy <policyName>...<policyName>]`
Verify if the cluster setup can support all enabled erasure coding policies. If optional parameter -policy is specified, verify if the cluster setup can support the given policy or policies.
Limitations
-----------

58
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/tools/TestECAdmin.java
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@ -68,8 +68,7 @@ public void tearDown() throws Exception {
try {
System.out.flush();
System.err.flush();
out.reset();
err.reset();
resetOutputs();
} finally {
System.setOut(OLD_OUT);
System.setErr(OLD_ERR);
@ -242,4 +241,59 @@ public void testEnableNonExistentPolicyMessage() throws Exception {
err.toString().contains("RemoteException: The policy name " +
"NonExistentPolicy does not exist"));
}
@Test
public void testVerifyClusterSetupWithGivenPolicies() throws Exception {
cluster = DFSTestUtil.setupCluster(conf, 5, 2, 0);
String[] args = new String[]{"-verifyClusterSetup", "-policy",
"RS-3-2-1024k"};
int ret = admin.run(args);
LOG.info("Command stdout: {}", out.toString());
LOG.info("Command stderr: {}", err.toString());
assertEquals("Return value of the command is not successful", 2, ret);
assertTrue("Result of cluster topology verify " +
"should be logged correctly", out.toString()
.contains("less than the minimum required number of racks (3) " +
"for the erasure coding policies: RS-3-2-1024k"));
assertTrue("Error output should be empty", err.toString().isEmpty());
resetOutputs();
args = new String[]{"-verifyClusterSetup", "-policy",
"RS-10-4-1024k", "RS-3-2-1024k"};
ret = admin.run(args);
LOG.info("Command stdout: {}", out.toString());
LOG.info("Command stderr: {}", err.toString());
assertEquals("Return value of the command is not successful", 2, ret);
assertTrue("Result of cluster topology verify " +
"should be logged correctly", out.toString()
.contains(
"for the erasure coding policies: RS-10-4-1024k, RS-3-2-1024k"));
assertTrue("Error output should be empty", err.toString().isEmpty());
resetOutputs();
args = new String[]{"-verifyClusterSetup", "-policy", "invalidPolicy"};
ret = admin.run(args);
LOG.info("Command stdout: {}", out.toString());
LOG.info("Command stderr: {}", err.toString());
assertEquals("Return value of the command is not successful", -1, ret);
assertTrue("Error message should be logged", err.toString()
.contains("The given erasure coding policy invalidPolicy " +
"does not exist."));
resetOutputs();
args = new String[]{"-verifyClusterSetup", "-policy"};
ret = admin.run(args);
LOG.info("Command stdout: {}", out.toString());
LOG.info("Command stderr: {}", err.toString());
assertEquals("Return value of the command is not successful", -1, ret);
assertTrue("Error message should be logged", err.toString()
.contains("NotEnoughArgumentsException: Not enough arguments: " +
"expected 1 but got 0"));
}
private void resetOutputs() {
out.reset();
err.reset();
}
}