public Connection masterConnect(String ip, String username, Queue<String> password) {
Connection conn = null;
try {
conn = new Connection(getURL(ip), 10);
s_logger.debug("Logging on as the master to " + ip);
loginWithPassword(conn, username, password, APIVersion.latest().toString());
return conn;
} catch (Exception e) {
s_logger.debug("Failed to slave local login to " + ip);
}
throw new RuntimeException("can not log in to master " + ip);
}
void PoolEmergencyTransitionToMaster(String slaveIp, String username, Queue<String> password) {
if (!s_managePool) {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Don't manage pool on error so sleeping for " + s_sleepOnError);
try {
Thread.sleep(s_sleepOnError);
} catch (InterruptedException ie) {
}
}
return;
}
Connection slaveConn = null;
Connection c = null;
try {
s_logger.debug("Trying to transition master to " + slaveIp);
slaveConn = new Connection(getURL(slaveIp), 10);
slaveLocalLoginWithPassword(slaveConn, username, password);
Pool.emergencyTransitionToMaster(slaveConn);
// restart xapi in 10 sec
forceSleep(10);
// check if the master of this host is set correctly.
c = new Connection(getURL(slaveIp), 10);
for (int i = 0; i < 30; i++) {
try {
loginWithPassword(c, username, password, APIVersion.latest().toString());
s_logger.debug("Succeeded to transition master to " + slaveIp);
return;
} catch (Types.HostIsSlave e) {
s_logger.debug("HostIsSlave: Still waiting for the conversion to the master " + slaveIp);
} catch (Exception e) {
s_logger.debug("Exception: Still waiting for the conversion to the master");
}
forceSleep(2);
}
throw new RuntimeException("EmergencyTransitionToMaster failed after retry 30 times");
} catch (Exception e) {
throw new RuntimeException("EmergencyTransitionToMaster failed due to " + e.getMessage());
} finally {
localLogout(slaveConn);
slaveConn = null;
if (c != null) {
try {
Session.logout(c);
c.dispose();
} catch (Exception e) {
}
}
}
}
protected Session loginWithPassword(
Connection conn, String username, Queue<String> password, String version)
throws BadServerResponse, XenAPIException, XmlRpcException {
Session s = null;
boolean logged_in = false;
Exception ex = null;
while (!logged_in) {
try {
s =
Session.loginWithPassword(
conn, username, password.peek(), APIVersion.latest().toString());
logged_in = true;
} catch (BadServerResponse e) {
logged_in = false;
ex = e;
} catch (XenAPIException e) {
logged_in = false;
ex = e;
} catch (XmlRpcException e) {
logged_in = false;
ex = e;
}
if (logged_in && conn != null) {
break;
} else {
if (password.size() > 1) {
password.remove();
continue;
} else {
// the last password did not work leave it and flag error
if (ex instanceof BadServerResponse) {
throw (BadServerResponse) ex;
} else if (ex instanceof XmlRpcException) {
throw (XmlRpcException) ex;
} else if (ex instanceof Types.SessionAuthenticationFailed) {
throw (Types.SessionAuthenticationFailed) ex;
} else if (ex instanceof XenAPIException) {
throw (XenAPIException) ex;
}
}
}
}
return s;
}
@Override
protected Map dispatch(String method_call, Object[] method_params)
throws XmlRpcException, XenAPIException {
if (method_call.equals("session.local_logout")
|| method_call.equals("session.slave_local_login_with_password")
|| method_call.equals("session.logout")) {
return super.dispatch(method_call, method_params);
}
if (method_call.equals("session.login_with_password")) {
int retries = 0;
while (retries++ < _retries) {
try {
return super.dispatch(method_call, method_params);
} catch (XmlRpcException e) {
Throwable cause = e.getCause();
if (cause == null || !(cause instanceof SocketException)) {
throw e;
}
if (retries >= _retries) {
throw e;
}
s_logger.debug("Unable to login...retrying " + retries);
}
try {
Thread.sleep(_interval);
} catch (InterruptedException e) {
s_logger.debug("Man....I was just getting comfortable there....who woke me up?");
}
}
} else {
int retries = 0;
while (retries++ < _retries) {
try {
return super.dispatch(method_call, method_params);
} catch (Types.SessionInvalid e) {
s_logger.debug(
"Session is invalid for method: "
+ method_call
+ " due to "
+ e.getMessage()
+ ". Reconnecting...retry="
+ retries);
if (retries >= _retries) {
removeConnect(_poolUuid);
throw e;
}
loginWithPassword(this, _username, _password, APIVersion.latest().toString());
method_params[0] = getSessionReference();
} catch (XmlRpcClientException e) {
s_logger.debug(
"XmlRpcClientException for method: " + method_call + " due to " + e.getMessage());
removeConnect(_poolUuid);
throw e;
} catch (XmlRpcException e) {
s_logger.debug(
"XmlRpcException for method: "
+ method_call
+ " due to "
+ e.getMessage()
+ ". Reconnecting...retry="
+ retries);
if (retries >= _retries) {
removeConnect(_poolUuid);
throw e;
}
Throwable cause = e.getCause();
if (cause == null || !(cause instanceof SocketException)) {
removeConnect(_poolUuid);
throw e;
}
} catch (Types.HostIsSlave e) {
s_logger.debug(
"HostIsSlave Exception for method: "
+ method_call
+ " due to "
+ e.getMessage()
+ ". Reconnecting...retry="
+ retries);
removeConnect(_poolUuid);
throw e;
}
try {
Thread.sleep(_interval);
} catch (InterruptedException e) {
s_logger.info("Who woke me from my slumber?");
}
}
assert false : "We should never get here";
removeConnect(_poolUuid);
}
throw new CloudRuntimeException(
"After " + _retries + " retries, we cannot contact the host ");
}
public Connection connect(
String hostUuid,
String poolUuid,
String ipAddress,
String username,
Queue<String> password,
int wait) {
XenServerConnection mConn = null;
Connection sConn = null;
String masterIp = null;
if (hostUuid == null
|| poolUuid == null
|| ipAddress == null
|| username == null
|| password == null) {
String msg =
"Connect some parameter are null hostUuid:"
+ hostUuid
+ " ,poolUuid:"
+ poolUuid
+ " ,ipAddress:"
+ ipAddress;
s_logger.debug(msg);
throw new CloudRuntimeException(msg);
}
Host host = null;
synchronized (poolUuid.intern()) {
// Let's see if it is an existing connection.
mConn = getConnect(poolUuid);
if (mConn != null) {
try {
host = Host.getByUuid(mConn, hostUuid);
} catch (Types.SessionInvalid e) {
s_logger.debug(
"Session thgrough ip "
+ mConn.getIp()
+ " is invalid for pool("
+ poolUuid
+ ") due to "
+ e.toString());
try {
loginWithPassword(
mConn, mConn.getUsername(), mConn.getPassword(), APIVersion.latest().toString());
} catch (Exception e1) {
if (s_logger.isDebugEnabled()) {
s_logger.debug(
"connect through IP("
+ mConn.getIp()
+ " for pool("
+ poolUuid
+ ") is broken due to "
+ e.toString());
}
removeConnect(poolUuid);
mConn = null;
}
} catch (UuidInvalid e) {
String msg =
"Host("
+ hostUuid
+ ") doesn't belong to pool("
+ poolUuid
+ "), please execute 'xe pool-join master-address="
+ mConn.getIp()
+ " master-username="******"connect through IP("
+ mConn.getIp()
+ " for pool("
+ poolUuid
+ ") is broken due to "
+ e.toString());
}
removeConnect(poolUuid);
mConn = null;
}
}
if (mConn == null) {
try {
try {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Logging on as the slave to " + ipAddress);
}
sConn = new Connection(getURL(ipAddress), 5);
slaveLocalLoginWithPassword(sConn, username, password);
} catch (Exception e) {
String msg =
"Unable to create slave connection to host("
+ hostUuid
+ ") due to "
+ e.toString();
if (s_logger.isDebugEnabled()) {
s_logger.debug(msg);
}
throw new CloudRuntimeException(msg, e);
}
Pool.Record pr = null;
try {
pr = getPoolRecord(sConn);
} catch (Exception e) {
PoolEmergencyTransitionToMaster(ipAddress, username, password);
mConn =
new XenServerConnection(
getURL(ipAddress), ipAddress, username, password, _retries, _interval, wait);
try {
loginWithPassword(mConn, username, password, APIVersion.latest().toString());
pr = getPoolRecord(mConn);
} catch (Exception e1) {
String msg =
"Unable to create master connection to host("
+ hostUuid
+ ") after transition it to master, due to "
+ e1.toString();
if (s_logger.isDebugEnabled()) {
s_logger.debug(msg);
}
throw new CloudRuntimeException(msg, e1);
}
if (!pr.uuid.equals(poolUuid)) {
String msg =
"host("
+ hostUuid
+ ") should be in pool("
+ poolUuid
+ "), but it is actually in pool("
+ pr.uuid
+ ")";
if (s_logger.isDebugEnabled()) {
s_logger.debug(msg);
}
throw new CloudRuntimeException(msg);
} else {
if (s_managePool) {
ensurePoolIntegrity(mConn, ipAddress, username, password, wait);
}
addConnect(poolUuid, mConn);
return mConn;
}
}
if (!pr.uuid.equals(poolUuid)) {
String msg =
"host("
+ hostUuid
+ ") should be in pool("
+ poolUuid
+ "), but it is actually in pool("
+ pr.uuid
+ ")";
if (s_logger.isDebugEnabled()) {
s_logger.debug(msg);
}
throw new CloudRuntimeException(msg);
}
try {
masterIp = pr.master.getAddress(sConn);
mConn =
new XenServerConnection(
getURL(masterIp), masterIp, username, password, _retries, _interval, wait);
loginWithPassword(mConn, username, password, APIVersion.latest().toString());
addConnect(poolUuid, mConn);
return mConn;
} catch (Exception e) {
String msg = "Unable to logon in " + masterIp + " as master in pool(" + poolUuid + ")";
if (s_logger.isDebugEnabled()) {
s_logger.debug(msg);
}
throw new CloudRuntimeException(msg);
}
} finally {
localLogout(sConn);
sConn = null;
}
}
}
if (mConn != null) {
if (s_managePool) {
try {
Map<String, String> args = new HashMap<String, String>();
host.callPlugin(mConn, "echo", "main", args);
} catch (Types.SessionInvalid e) {
if (s_logger.isDebugEnabled()) {
String msg =
"Catch Exception: "
+ e.getClass().getName()
+ " Can't connect host "
+ ipAddress
+ " due to "
+ e.toString();
s_logger.debug(msg);
}
PoolEmergencyResetMaster(
ipAddress, mConn.getIp(), mConn.getUsername(), mConn.getPassword());
} catch (Types.CannotContactHost e) {
if (s_logger.isDebugEnabled()) {
String msg =
"Catch Exception: "
+ e.getClass().getName()
+ " Can't connect host "
+ ipAddress
+ " due to "
+ e.toString();
s_logger.debug(msg);
}
PoolEmergencyResetMaster(
ipAddress, mConn.getIp(), mConn.getUsername(), mConn.getPassword());
} catch (Types.HostOffline e) {
if (s_logger.isDebugEnabled()) {
String msg =
"Catch Exception: "
+ e.getClass().getName()
+ " Host is offline "
+ ipAddress
+ " due to "
+ e.toString();
s_logger.debug(msg);
}
PoolEmergencyResetMaster(
ipAddress, mConn.getIp(), mConn.getUsername(), mConn.getPassword());
} catch (Types.HostNotLive e) {
String msg =
"Catch Exception: "
+ e.getClass().getName()
+ " Host Not Live "
+ ipAddress
+ " due to "
+ e.toString();
if (s_logger.isDebugEnabled()) {
s_logger.debug(msg);
}
PoolEmergencyResetMaster(
ipAddress, mConn.getIp(), mConn.getUsername(), mConn.getPassword());
} catch (Exception e) {
String msg = "Echo test failed on host " + hostUuid + " IP " + ipAddress;
s_logger.warn(msg, e);
throw new CloudRuntimeException(msg, e);
}
}
}
return mConn;
}
public void switchMaster(
String slaveIp,
String poolUuid,
Connection conn,
Host host,
String username,
Queue<String> password,
int wait)
throws XmlRpcException, XenAPIException {
synchronized (poolUuid.intern()) {
String masterIp = host.getAddress(conn);
s_logger.debug("Designating the new master to " + masterIp);
Pool.designateNewMaster(conn, host);
Connection slaveConn = null;
Connection masterConn = null;
int retry = 30;
for (int i = 0; i < retry; i++) {
forceSleep(5);
try {
if (s_logger.isDebugEnabled()) {
s_logger.debug("Logging on as the slave to " + slaveIp);
}
slaveConn = null;
masterConn = null;
Session slaveSession = null;
slaveConn = new Connection(getURL(slaveIp), 10);
slaveSession = slaveLocalLoginWithPassword(slaveConn, username, password);
if (s_logger.isDebugEnabled()) {
s_logger.debug("Slave logon successful. session= " + slaveSession);
}
Pool.Record pr = getPoolRecord(slaveConn);
Host master = pr.master;
String ma = master.getAddress(slaveConn);
if (!ma.trim().equals(masterIp.trim())) {
continue;
}
s_logger.debug("Logging on as the master to " + masterIp);
masterConn = new Connection(getURL(masterIp), 10);
loginWithPassword(masterConn, username, password, APIVersion.latest().toString());
removeConnect(poolUuid);
ensurePoolIntegrity(masterConn, masterIp, username, password, wait);
return;
} catch (Types.HostIsSlave e) {
s_logger.debug("HostIsSlaveException: Still waiting for the conversion to the master");
} catch (XmlRpcException e) {
s_logger.debug(
"XmlRpcException: Still waiting for the conversion to the master " + e.getMessage());
} catch (Exception e) {
s_logger.debug(
"Exception: Still waiting for the conversion to the master" + e.getMessage());
} finally {
if (masterConn != null) {
try {
Session.logout(masterConn);
} catch (Exception e) {
s_logger.debug("Unable to log out of session: " + e.getMessage());
}
masterConn.dispose();
masterConn = null;
}
localLogout(slaveConn);
slaveConn = null;
}
}
throw new CloudRuntimeException(
"Unable to logon to the new master after " + retry + " retries");
}
}