void PandadClassAdLogPlugin::setAttribute( const char * key, const char * attribute, const char * value ) {
int cluster = 0, proc = 0;
if( shouldIgnoreJob( key, cluster, proc ) ) { return; }
dprintf( D_FULLDEBUG, "PANDA: setAttribute( %s, %s, %s ).\n", key, attribute, value );
std::string globalJobID;
if( ! getGlobalJobID( cluster, proc, globalJobID ) ) { return; }
// See comment in newClassAd(), above.
if( strcmp( attribute, "ProcId" ) == 0 ) {
ClassAd * clusterAd = ScheddGetJobAd( cluster, -1 );
if( clusterAd != NULL ) {
ExprTree * valueExpr = NULL;
const char * attribute = NULL;
clusterAd->ResetExpr();
while( clusterAd->NextExpr( attribute, valueExpr ) ) {
dprintf( D_FULLDEBUG, "PANDA: found %s in cluster ad.\n", attribute );
if( shouldIgnoreAttribute( attribute ) ) { continue; }
std::string valueString;
classad::ClassAdUnParser unparser;
unparser.Unparse( valueString, valueExpr );
updatePandaJob( globalJobID.c_str(), attribute, valueString.c_str() );
}
} else {
dprintf( D_FULLDEBUG, "PANDA: Failed to find cluster ad for %d.%d\n", cluster, proc );
}
}
if( shouldIgnoreAttribute( attribute ) ) { return; }
updatePandaJob( globalJobID.c_str(), attribute, value );
}
void
OfflineCollectorPlugin::mergeClassAd (
ClassAd &ad,
char const *key )
{
ClassAd *old_ad = NULL;
if (!_ads) return;
_ads->BeginTransaction ();
if ( !_ads->LookupClassAd ( key, old_ad ) ) {
_ads->AbortTransaction ();
return;
}
ad.ResetExpr();
ExprTree *expr;
const char *attr_name;
while (ad.NextExpr(attr_name, expr)) {
MyString new_val;
MyString old_val;
ASSERT( attr_name && expr );
new_val = ExprTreeToString( expr );
expr = old_ad->LookupExpr( attr_name );
if( expr ) {
old_val = ExprTreeToString( expr );
if( new_val == old_val ) {
continue;
}
}
// filter out stuff we never want to mess with
if( !strcasecmp(attr_name,ATTR_MY_TYPE) ||
!strcasecmp(attr_name,ATTR_TARGET_TYPE) ||
!strcasecmp(attr_name,ATTR_AUTHENTICATED_IDENTITY) )
{
continue;
}
_ads->SetAttribute(key, attr_name, new_val.Value());
}
_ads->CommitTransaction ();
}
void
HookPrepareJobClient::hookExited(int exit_status) {
HookClient::hookExited(exit_status);
if (WIFSIGNALED(exit_status) || WEXITSTATUS(exit_status) != 0) {
MyString status_msg = "";
statusString(exit_status, status_msg);
int subcode;
if (WIFSIGNALED(exit_status)) {
subcode = -1 * WTERMSIG(exit_status);
}
else {
subcode = WEXITSTATUS(exit_status);
}
MyString err_msg;
err_msg.sprintf("HOOK_PREPARE_JOB (%s) failed (%s)", m_hook_path,
status_msg.Value());
dprintf(D_ALWAYS|D_FAILURE,
"ERROR in StarterHookMgr::tryHookPrepareJob: %s\n",
err_msg.Value());
Starter->jic->notifyStarterError(err_msg.Value(), true,
CONDOR_HOLD_CODE_HookPrepareJobFailure, subcode);
Starter->RemoteShutdownFast(0);
}
else {
// Make an update ad from the stdout of the hook
MyString out(*getStdOut());
ClassAd updateAd;
updateAd.initFromString(out.Value(), NULL);
dprintf(D_FULLDEBUG, "Prepare hook output classad\n");
updateAd.dPrint(D_FULLDEBUG);
// Insert each expr from the update ad into the job ad
updateAd.ResetExpr();
ClassAd* job_ad = Starter->jic->jobClassAd();
const char *name;
ExprTree *et;
while (updateAd.NextExpr(name, et)) {
ExprTree *pCopy = et->Copy();
job_ad->Insert(name, pCopy, false);
}
dprintf(D_FULLDEBUG, "After Prepare hook: merged job classad:\n");
job_ad->dPrint(D_FULLDEBUG);
Starter->jobEnvironmentReady();
}
}
bool
BaseCodec::classAdToMap(ClassAd& ad, AttributeMapType& _map)
{
ExprTree *expr;
const char *name;
ad.ResetExpr();
_map.clear();
while (ad.NextExpr(name,expr)) {
if (!addAttributeToMap(ad, name, _map)) {
return false;
}
}
// //debug
// if (IsFulldebug(D_FULLDEBUG)) {
// ad.dPrint(D_FULLDEBUG|D_NOHEADER);
// }
return true;
}
// download the files associated with the jobads to the sandbox at td_sinful
// with the supplied capability.
// The work_ad should contain:
// ATTR_TREQ_CAPABILITY
// ATTR_TREQ_FTP
// ATTR_TREQ_JOBID_ALLOW_LIST
bool
DCTransferD::download_job_files(ClassAd *work_ad, CondorError * errstack)
{
ReliSock *rsock = NULL;
int timeout = 60 * 60 * 8; // transfers take a long time...
int i;
ClassAd reqad, respad;
std::string cap;
int ftp;
int invalid;
int protocol;
std::string reason;
int num_transfers;
ClassAd jad;
const char *lhstr = NULL;
ExprTree *tree = NULL;
//////////////////////////////////////////////////////////////////////////
// Connect to the transferd and authenticate
//////////////////////////////////////////////////////////////////////////
// This call with automatically connect to _addr, which was set in the
// constructor of this object to be the transferd in question.
rsock = (ReliSock*)startCommand(TRANSFERD_READ_FILES, Stream::reli_sock,
timeout, errstack);
if( ! rsock ) {
dprintf( D_ALWAYS, "DCTransferD::download_job_files: "
"Failed to send command (TRANSFERD_READ_FILES) "
"to the schedd\n" );
errstack->push("DC_TRANSFERD", 1,
"Failed to start a TRANSFERD_READ_FILES command.");
return false;
}
// First, if we're not already authenticated, force that now.
if (!forceAuthentication( rsock, errstack )) {
dprintf( D_ALWAYS, "DCTransferD::download_job_files() authentication "
"failure: %s\n", errstack->getFullText().c_str() );
errstack->push("DC_TRANSFERD", 1,
"Failed to authenticate properly.");
return false;
}
rsock->encode();
//////////////////////////////////////////////////////////////////////////
// Query the transferd about the capability/protocol and see if I can
// download my files. It will respond with a classad saying good or bad.
//////////////////////////////////////////////////////////////////////////
work_ad->LookupString(ATTR_TREQ_CAPABILITY, cap);
work_ad->LookupInteger(ATTR_TREQ_FTP, ftp);
reqad.Assign(ATTR_TREQ_CAPABILITY, cap);
reqad.Assign(ATTR_TREQ_FTP, ftp);
// This request ad to the transferd should contain:
// ATTR_TREQ_CAPABILITY
// ATTR_TREQ_FTP
reqad.put(*rsock);
rsock->end_of_message();
rsock->decode();
// This response ad from the transferd should contain:
// ATTR_TREQ_INVALID_REQUEST (set to true)
// ATTR_TREQ_INVALID_REASON
//
// OR
//
// ATTR_TREQ_INVALID_REQUEST (set to false)
// ATTR_TREQ_NUM_TRANSFERS
//
respad.initFromStream(*rsock);
rsock->end_of_message();
respad.LookupInteger(ATTR_TREQ_INVALID_REQUEST, invalid);
if (invalid == TRUE) {
// The transferd rejected my attempt to upload the fileset
delete rsock;
respad.LookupString(ATTR_TREQ_INVALID_REASON, reason);
errstack->push("DC_TRANSFERD", 1, reason.c_str());
return false;
}
respad.LookupInteger(ATTR_TREQ_NUM_TRANSFERS, num_transfers);
//////////////////////////////////////////////////////////////////////////
// Based upon the protocol I've chosen, use that method to download the
// files. When using the FileTrans protocol, a child process on the
// transferd side will be sending me individual job ads and then
// instantiating a filetransfer object for that ad.
//////////////////////////////////////////////////////////////////////////
dprintf(D_ALWAYS, "Receiving fileset");
work_ad->LookupInteger(ATTR_TREQ_FTP, protocol);
switch(protocol) {
case FTP_CFTP: // download the files using the FileTransfer Object
for (i = 0; i < num_transfers; i++) {
// Grab a job ad the server is sending us so we know what
// to receive.
jad.initFromStream(*rsock);
rsock->end_of_message();
// translate the job ad by replacing the
// saved SUBMIT_ attributes so the download goes into the
// correct place.
jad.ResetExpr();
while( jad.NextExpr(lhstr, tree) ) {
if ( lhstr && strncasecmp("SUBMIT_",lhstr,7)==0 ) {
// this attr name starts with SUBMIT_
// compute new lhs (strip off the SUBMIT_)
const char *new_attr_name = strchr(lhstr,'_');
ExprTree * pTree;
ASSERT(new_attr_name);
new_attr_name++;
// insert attribute
pTree = tree->Copy();
jad.Insert(new_attr_name, pTree, false);
}
} // while next expr
// instantiate a filetransfer object and have it accept the
// files.
FileTransfer ftrans;
if ( !ftrans.SimpleInit(&jad, false, false, rsock) )
{
delete rsock;
errstack->push("DC_TRANSFERD", 1,
"Failed to initate uploading of files.");
return false;
}
// We want files to be copied to their final places, so apply
// any filename remaps when downloading.
if ( !ftrans.InitDownloadFilenameRemaps(&jad) ) {
return false;
}
ftrans.setPeerVersion( version() );
if ( !ftrans.DownloadFiles() ) {
delete rsock;
errstack->push("DC_TRANSFERD", 1,
"Failed to download files.");
return false;
}
dprintf(D_ALWAYS | D_NOHEADER, ".");
}
rsock->end_of_message();
dprintf(D_ALWAYS | D_NOHEADER, "\n");
break;
default:
// Bail due to user error. This client doesn't support the unknown
// protocol.
delete rsock;
errstack->push("DC_TRANSFERD", 1,
"Unknown file transfer protocol selected.");
return false;
break;
}
//////////////////////////////////////////////////////////////////////////
// Get the response from the transferd once it sees a completed
// movement of files to the child process.
//////////////////////////////////////////////////////////////////////////
rsock->decode();
respad.initFromStream(*rsock);
rsock->end_of_message();
// close up shop
delete rsock;
respad.LookupInteger(ATTR_TREQ_INVALID_REQUEST, invalid);
if ( invalid == TRUE ) {
respad.LookupString(ATTR_TREQ_INVALID_REASON, reason);
errstack->push("DC_TRANSFERD", 1, reason.c_str());
return false;
}
return true;
}
bool
SchedulerObject::submit(AttributeMapType &jobAdMap, std::string &id, std::string &text)
{
int cluster;
int proc;
if (!m_codec) {
text = "Codec has not been initialized";
return false;
}
// our mandatory set of attributes for a submit
const char* required[] = {
ATTR_JOB_CMD,
ATTR_REQUIREMENTS,
ATTR_OWNER,
ATTR_JOB_IWD,
NULL
};
// 1. Create transaction
BeginTransaction();
// 2. Create cluster
if (-1 == (cluster = NewCluster())) {
AbortTransaction();
text = "Failed to create new cluster";
return false;
}
// 3. Create proc
if (-1 == (proc = NewProc(cluster))) {
AbortTransaction();
text = "Failed to create new proc";
return false;
}
// 4. Submit job ad
// Schema: (vanilla job)
// Schedd demands - Owner, JobUniverse
// To run - JobStatus, Requirements
// Schedd excepts if no Owner
// Schedd prunes on startup if no Owner or JobUniverse
// Schedd won't run job without JobStatus
// Job cannot match without Requirements
// Shadow rejects jobs without an Iwd
// Shadow: Job has no CondorVersion, assuming pre version 6.3.3
// Shadow: Unix Vanilla job is pre version 6.3.3, setting 'TransferFiles = "NEVER"'
// Starter won't run job without Cmd
// Starter needs a valid Owner (local account name) if not using nobody
// condor_q requires ClusterId (int), ProcId (int), QDate (int), RemoteUserCpu (float), JobStatus (int), JobPrio (int), ImageSize (int), Owner (str) and Cmd (str)
// Schema: (vm job)
// ShouldTransferFiles - unset by default, must be set
ClassAd ad;
int universe;
// ShouldTransferFiles - unset by default, must be set
// shadow will try to setup local transfer sandbox otherwise
// without good priv
ad.Assign(ATTR_SHOULD_TRANSFER_FILES, "NO");
if (!m_codec->mapToClassAd(jobAdMap, ad, text)) {
AbortTransaction();
return false;
}
std::string missing;
if (!checkRequiredAttrs(ad, required, missing)) {
AbortTransaction();
text = "Job ad is missing required attributes: " + missing;
return false;
}
// EARLY SET: These attribute are set early so the incoming ad
// has a change to override them.
::SetAttribute(cluster, proc, ATTR_JOB_STATUS, "1"); // 1 = idle
// Junk that condor_q wants, but really shouldn't be necessary
::SetAttribute(cluster, proc, ATTR_JOB_REMOTE_USER_CPU, "0.0"); // float
::SetAttribute(cluster, proc, ATTR_JOB_PRIO, "0"); // int
::SetAttribute(cluster, proc, ATTR_IMAGE_SIZE, "0"); // int
if (!ad.LookupInteger(ATTR_JOB_UNIVERSE, universe)) {
char* uni_str = param("DEFAULT_UNIVERSE");
if (!uni_str) {
universe = CONDOR_UNIVERSE_VANILLA;
}
else {
universe = CondorUniverseNumber(uni_str);
}
::SetAttributeInt(cluster, proc, ATTR_JOB_UNIVERSE, universe );
}
// more stuff - without these our idle stats are whack
if ( universe != CONDOR_UNIVERSE_MPI && universe != CONDOR_UNIVERSE_PVM ) {
::SetAttribute(cluster, proc, ATTR_MAX_HOSTS, "1"); // int
::SetAttribute(cluster, proc, ATTR_MIN_HOSTS, "1"); // int
}
::SetAttribute(cluster, proc, ATTR_CURRENT_HOSTS, "0"); // int
ExprTree *expr;
const char *name;
std::string value;
ad.ResetExpr();
while (ad.NextExpr(name,expr)) {
// All these extra lookups are horrible. They have to
// be there because the ClassAd may have multiple
// copies of the same attribute name! This means that
// the last attribute with a given name will set the
// value, but the last attribute tends to be the
// attribute with the oldest (wrong) value. How
// annoying is that!
if (!(expr = ad.Lookup(name))) {
dprintf(D_ALWAYS, "Failed to lookup %s\n", name);
AbortTransaction();
text = "Failed to parse job ad attribute";
return false;
}
value = ExprTreeToString(expr);
::SetAttribute(cluster, proc, name, value.c_str());
}
// LATE SET: These attributes are set late, after the incoming
// ad, so they override whatever the incoming ad set.
char buf[22]; // 22 is max size for an id, 2^32 + . + 2^32 + \0
snprintf(buf, 22, "%d", cluster);
::SetAttribute(cluster, proc, ATTR_CLUSTER_ID, buf);
snprintf(buf, 22, "%d", proc);
::SetAttribute(cluster, proc, ATTR_PROC_ID, buf);
snprintf(buf, 22, "%ld", time(NULL));
::SetAttribute(cluster, proc, ATTR_Q_DATE, buf);
// Could check for some invalid attributes, e.g
// JobUniverse <= CONDOR_UNIVERSE_MIN or >= CONDOR_UNIVERSE_MAX
// 5. Commit transaction
CommitTransaction();
// 6. Reschedule
scheduler.needReschedule();
// 7. Return identifier
// TODO: dag ids?
string tmp;
//tmp.sprintf("%s#%d.%d", Name, cluster, proc);
// we have other API compositions for job id and submission id
// so let's return raw cluster.proc
aviUtilFmt(tmp,"%d.%d", cluster, proc);
id = tmp.c_str();
return true;
}
bool
DCSchedd::receiveJobSandbox(const char* constraint, CondorError * errstack, int * numdone /*=0*/)
{
if(numdone) { *numdone = 0; }
ExprTree *tree = NULL;
const char *lhstr;
int reply;
int i;
ReliSock rsock;
int JobAdsArrayLen;
bool use_new_command = true;
if ( version() ) {
CondorVersionInfo vi( version() );
if ( vi.built_since_version(6,7,7) ) {
use_new_command = true;
} else {
use_new_command = false;
}
}
// // // // // // // //
// On the wire protocol
// // // // // // // //
rsock.timeout(20); // years of research... :)
if( ! rsock.connect(_addr) ) {
dprintf( D_ALWAYS, "DCSchedd::receiveJobSandbox: "
"Failed to connect to schedd (%s)\n", _addr );
return false;
}
if ( use_new_command ) {
if( ! startCommand(TRANSFER_DATA_WITH_PERMS, (Sock*)&rsock, 0,
errstack) ) {
dprintf( D_ALWAYS, "DCSchedd::receiveJobSandbox: "
"Failed to send command (TRANSFER_DATA_WITH_PERMS) "
"to the schedd\n" );
return false;
}
} else {
if( ! startCommand(TRANSFER_DATA, (Sock*)&rsock, 0, errstack) ) {
dprintf( D_ALWAYS, "DCSchedd::receiveJobSandbox: "
"Failed to send command (TRANSFER_DATA) "
"to the schedd\n" );
return false;
}
}
// First, if we're not already authenticated, force that now.
if (!forceAuthentication( &rsock, errstack )) {
dprintf( D_ALWAYS,
"DCSchedd::receiveJobSandbox: authentication failure: %s\n",
errstack ? errstack->getFullText().c_str() : "" );
return false;
}
rsock.encode();
// Send our version if using the new command
if ( use_new_command ) {
// Need to use a named variable, else the wrong version of
// code() is called.
char *my_version = strdup( CondorVersion() );
if ( !rsock.code(my_version) ) {
dprintf(D_ALWAYS,"DCSchedd:receiveJobSandbox: "
"Can't send version string to the schedd\n");
free( my_version );
return false;
}
free( my_version );
}
// Send the constraint
char * nc_constraint = strdup( constraint ); // de-const
if ( !rsock.code(nc_constraint) ) {
free( nc_constraint );
dprintf(D_ALWAYS,"DCSchedd:receiveJobSandbox: "
"Can't send JobAdsArrayLen to the schedd\n");
return false;
}
free( nc_constraint );
if ( !rsock.end_of_message() ) {
std::string errmsg;
formatstr(errmsg,
"Can't send initial message (version + constraint) to schedd (%s)",
_addr);
dprintf(D_ALWAYS,"DCSchedd::receiveJobSandbox: %s\n", errmsg.c_str());
if( errstack ) {
errstack->push(
"DCSchedd::receiveJobSandbox",
CEDAR_ERR_EOM_FAILED,
errmsg.c_str());
}
return false;
}
// Now, read how many jobs matched the constraint.
rsock.decode();
if ( !rsock.code(JobAdsArrayLen) ) {
std::string errmsg;
formatstr(errmsg,
"Can't receive JobAdsArrayLen from the schedd (%s)",
_addr);
dprintf(D_ALWAYS,"DCSchedd::receiveJobSandbox: %s\n", errmsg.c_str());
if( errstack ) {
errstack->push(
"DCSchedd::receiveJobSandbox",
CEDAR_ERR_GET_FAILED,
errmsg.c_str());
}
return false;
}
rsock.end_of_message();
dprintf(D_FULLDEBUG,"DCSchedd:receiveJobSandbox: "
"%d jobs matched my constraint (%s)\n",
JobAdsArrayLen, constraint);
// Now read all the files via the file transfer object
for (i=0; i<JobAdsArrayLen; i++) {
FileTransfer ftrans;
ClassAd job;
// grab job ClassAd
if ( !getClassAd(&rsock, job) ) {
std::string errmsg;
formatstr(errmsg, "Can't receive job ad %d from the schedd", i);
dprintf(D_ALWAYS, "DCSchedd::receiveJobSandbox: %s\n", errmsg.c_str());
if( errstack ) {
errstack->push(
"DCSchedd::receiveJobSandbox",
CEDAR_ERR_GET_FAILED,
errmsg.c_str());
}
return false;
}
rsock.end_of_message();
// translate the job ad by replacing the
// saved SUBMIT_ attributes
job.ResetExpr();
while( job.NextExpr(lhstr, tree) ) {
if ( lhstr && strncasecmp("SUBMIT_",lhstr,7)==0 ) {
// this attr name starts with SUBMIT_
// compute new lhs (strip off the SUBMIT_)
const char *new_attr_name = strchr(lhstr,'_');
ExprTree * pTree;
ASSERT(new_attr_name);
new_attr_name++;
// insert attribute
pTree = tree->Copy();
job.Insert(new_attr_name, pTree, false);
}
} // while next expr
if ( !ftrans.SimpleInit(&job,false,false,&rsock) ) {
if( errstack ) {
int cluster = -1, proc = -1;
job.LookupInteger(ATTR_CLUSTER_ID,cluster);
job.LookupInteger(ATTR_PROC_ID,proc);
errstack->pushf(
"DCSchedd::receiveJobSandbox",
FILETRANSFER_INIT_FAILED,
"File transfer initialization failed for target job %d.%d",
cluster, proc );
}
return false;
}
// We want files to be copied to their final places, so apply
// any filename remaps when downloading.
if ( !ftrans.InitDownloadFilenameRemaps(&job) ) {
return false;
}
if ( use_new_command ) {
ftrans.setPeerVersion( version() );
}
if ( !ftrans.DownloadFiles() ) {
if( errstack ) {
FileTransfer::FileTransferInfo ft_info = ftrans.GetInfo();
int cluster = -1, proc = -1;
job.LookupInteger(ATTR_CLUSTER_ID,cluster);
job.LookupInteger(ATTR_PROC_ID,proc);
errstack->pushf(
"DCSchedd::receiveJobSandbox",
FILETRANSFER_DOWNLOAD_FAILED,
"File transfer failed for target job %d.%d: %s",
cluster, proc, ft_info.error_desc.Value() );
}
return false;
}
}
rsock.end_of_message();
rsock.encode();
reply = OK;
rsock.code(reply);
rsock.end_of_message();
if(numdone) { *numdone = JobAdsArrayLen; }
return true;
}
void
VMRegister::requestHostClassAds(void)
{
// find host startd daemon
if( !m_vm_host_daemon )
m_vm_host_daemon = vmapi_findDaemon( m_vm_host_name, DT_STARTD);
if( !m_vm_host_daemon ) {
dprintf( D_FULLDEBUG, "Can't find host(%s) Startd daemon\n", m_vm_host_name );
return;
}
ClassAd query_ad;
query_ad.SetMyTypeName(QUERY_ADTYPE);
query_ad.SetTargetTypeName(STARTD_ADTYPE);
query_ad.Assign(ATTR_REQUIREMENTS, true);
char *addr = m_vm_host_daemon->addr();
Daemon hstartd(DT_STARTD, addr);
ReliSock ssock;
ssock.timeout( VM_SOCKET_TIMEOUT );
ssock.encode();
if( !ssock.connect(addr) ) {
dprintf( D_FULLDEBUG, "Failed to connect to host startd(%s)\n to get host classAd", addr);
return;
}
if(!hstartd.startCommand( QUERY_STARTD_ADS, &ssock )) {
dprintf( D_FULLDEBUG, "Failed to send QUERY_STARTD_ADS command to host startd(%s)\n", addr);
return;
}
if( !query_ad.put(ssock) ) {
dprintf(D_FULLDEBUG, "Failed to send query Ad to host startd(%s)\n", addr);
}
if( !ssock.end_of_message() ) {
dprintf(D_FULLDEBUG, "Failed to send query EOM to host startd(%s)\n", addr);
}
// Read host classAds
ssock.timeout( VM_SOCKET_TIMEOUT );
ssock.decode();
int more = 1, num_ads = 0;
ClassAdList adList;
ClassAd *ad;
while (more) {
if( !ssock.code(more) ) {
ssock.end_of_message();
return;
}
if(more) {
ad = new ClassAd;
if( !ad->initFromStream(ssock) ) {
ssock.end_of_message();
delete ad;
return;
}
adList.Insert(ad);
num_ads++;
}
}
ssock.end_of_message();
dprintf(D_FULLDEBUG, "Got %d classAds from host\n", num_ads);
// Although we can get more than one classAd from host machine,
// we use only the first one classAd
adList.Rewind();
ad = adList.Next();
#if !defined(WANT_OLD_CLASSADS)
ad->AddTargetRefs( TargetJobAttrs );
#endif
// Get each Attribute from the classAd
// added "HOST_" in front of each Attribute name
const char *name;
ExprTree *expr;
ad->ResetExpr();
while( ad->NextExpr(name, expr) ) {
MyString attr;
attr += "HOST_";
attr += name;
// Insert or Update an attribute to host_classAd in a VMRegister object
ExprTree * pTree = expr->Copy();
host_classad->Insert(attr.Value(), pTree, true);
}
}