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HADOOP-10164. Allow UGI to login with a known Subject (bobby) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1552104 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Robert Joseph Evans 2013-12-18 21:20:56 +00:00
parent 9184c4d179
commit c9d74139bc
2 changed files with 54 additions and 37 deletions
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2
hadoop-common-project/hadoop-common/CHANGES.txt
View File

@ -399,6 +399,8 @@ Release 2.4.0 - UNRELEASED
HADOOP-10168. fix javadoc of ReflectionUtils#copy. (Thejas Nair via suresh)
HADOOP-10164. Allow UGI to login with a known Subject (bobby)
OPTIMIZATIONS
HADOOP-9748. Reduce blocking on UGI.ensureInitialized (daryn)

89
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java
View File

@ -477,7 +477,7 @@ public class UserGroupInformation {
private static final AppConfigurationEntry[] SIMPLE_CONF =
new AppConfigurationEntry[]{OS_SPECIFIC_LOGIN, HADOOP_LOGIN};
private static final AppConfigurationEntry[] USER_KERBEROS_CONF =
new AppConfigurationEntry[]{OS_SPECIFIC_LOGIN, USER_KERBEROS_LOGIN,
HADOOP_LOGIN};
@ -682,45 +682,60 @@ public class UserGroupInformation {
public synchronized
static UserGroupInformation getLoginUser() throws IOException {
if (loginUser == null) {
ensureInitialized();
try {
Subject subject = new Subject();
LoginContext login =
newLoginContext(authenticationMethod.getLoginAppName(),
subject, new HadoopConfiguration());
login.login();
UserGroupInformation realUser = new UserGroupInformation(subject);
realUser.setLogin(login);
realUser.setAuthenticationMethod(authenticationMethod);
realUser = new UserGroupInformation(login.getSubject());
// If the HADOOP_PROXY_USER environment variable or property
// is specified, create a proxy user as the logged in user.
String proxyUser = System.getenv(HADOOP_PROXY_USER);
if (proxyUser == null) {
proxyUser = System.getProperty(HADOOP_PROXY_USER);
}
loginUser = proxyUser == null ? realUser : createProxyUser(proxyUser, realUser);
String fileLocation = System.getenv(HADOOP_TOKEN_FILE_LOCATION);
if (fileLocation != null) {
// Load the token storage file and put all of the tokens into the
// user. Don't use the FileSystem API for reading since it has a lock
// cycle (HADOOP-9212).
Credentials cred = Credentials.readTokenStorageFile(
new File(fileLocation), conf);
loginUser.addCredentials(cred);
}
loginUser.spawnAutoRenewalThreadForUserCreds();
} catch (LoginException le) {
LOG.debug("failure to login", le);
throw new IOException("failure to login", le);
}
if (LOG.isDebugEnabled()) {
LOG.debug("UGI loginUser:"+loginUser);
}
loginUserFromSubject(null);
}
return loginUser;
}
/**
* Log in a user using the given subject
* @parma subject the subject to use when logging in a user, or null to
* create a new subject.
* @throws IOException if login fails
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public synchronized
static void loginUserFromSubject(Subject subject) throws IOException {
ensureInitialized();
try {
if (subject == null) {
subject = new Subject();
}
LoginContext login =
newLoginContext(authenticationMethod.getLoginAppName(),
subject, new HadoopConfiguration());
login.login();
UserGroupInformation realUser = new UserGroupInformation(subject);
realUser.setLogin(login);
realUser.setAuthenticationMethod(authenticationMethod);
realUser = new UserGroupInformation(login.getSubject());
// If the HADOOP_PROXY_USER environment variable or property
// is specified, create a proxy user as the logged in user.
String proxyUser = System.getenv(HADOOP_PROXY_USER);
if (proxyUser == null) {
proxyUser = System.getProperty(HADOOP_PROXY_USER);
}
loginUser = proxyUser == null ? realUser : createProxyUser(proxyUser, realUser);
String fileLocation = System.getenv(HADOOP_TOKEN_FILE_LOCATION);
if (fileLocation != null) {
// Load the token storage file and put all of the tokens into the
// user. Don't use the FileSystem API for reading since it has a lock
// cycle (HADOOP-9212).
Credentials cred = Credentials.readTokenStorageFile(
new File(fileLocation), conf);
loginUser.addCredentials(cred);
}
loginUser.spawnAutoRenewalThreadForUserCreds();
} catch (LoginException le) {
LOG.debug("failure to login", le);
throw new IOException("failure to login", le);
}
if (LOG.isDebugEnabled()) {
LOG.debug("UGI loginUser:"+loginUser);
}
}
@InterfaceAudience.Private
@InterfaceStability.Unstable