/
VmMetadata.java
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/
VmMetadata.java
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/*************************************************************************
* Copyright 2009-2015 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
* Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
* CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
* additional information or have any questions.
*
* This file may incorporate work covered under the following copyright
* and permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms,
* with or without modification, are permitted provided that the
* following conditions are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE. USERS OF THIS SOFTWARE ACKNOWLEDGE
* THE POSSIBLE PRESENCE OF OTHER OPEN SOURCE LICENSED MATERIAL,
* COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS SOFTWARE,
* AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA,
* SANTA BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY,
* WHICH IN THE REGENTS' DISCRETION MAY INCLUDE, WITHOUT LIMITATION,
* REPLACEMENT OF THE CODE SO IDENTIFIED, LICENSING OF THE CODE SO
* IDENTIFIED, OR WITHDRAWAL OF THE CODE CAPABILITY TO THE EXTENT
* NEEDED TO COMPLY WITH ANY SUCH LICENSES OR RIGHTS.
************************************************************************/
package com.eucalyptus.compute.metadata;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.concurrent.TimeUnit;
import javax.annotation.Nullable;
import org.apache.log4j.Logger;
import com.eucalyptus.bootstrap.Databases;
import com.eucalyptus.component.annotation.ComponentNamed;
import com.eucalyptus.compute.common.CloudMetadatas;
import com.eucalyptus.compute.common.network.Networking;
import com.eucalyptus.compute.common.network.NetworkingFeature;
import com.eucalyptus.compute.common.internal.identifier.ResourceIdentifiers;
import com.eucalyptus.entities.Entities;
import com.eucalyptus.entities.TransactionResource;
import com.eucalyptus.records.Logs;
import com.eucalyptus.util.ByteArray;
import com.eucalyptus.util.Exceptions;
import com.eucalyptus.vm.MetadataRequest;
import com.eucalyptus.vm.SensorsConfigMetadata;
import com.eucalyptus.compute.common.internal.vm.VmInstance;
import com.eucalyptus.vm.VmInstanceMetadata;
import com.eucalyptus.vm.VmInstances;
import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.base.Optional;
import com.google.common.base.Supplier;
import com.google.common.base.Suppliers;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheBuilderSpec;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
@ComponentNamed("computeVmMetadata")
public class VmMetadata {
private static//
Logger LOG = Logger.getLogger( VmMetadata.class );
private static//
Function<MetadataRequest, ByteArray> dynamicFunc = new Function<MetadataRequest, ByteArray>( ) {
public ByteArray apply( MetadataRequest arg0 ) {
try ( final TransactionResource db = Entities.transactionFor( VmInstance.class ) ) {
final VmInstance instance = VmInstances.lookup( arg0.getVmInstanceId() );
final String res = VmInstanceMetadata.getDynamicByKey( instance, arg0.getLocalPath() );
if ( res != null ) {
return ByteArray.newInstance( res );
}
} catch ( NoSuchElementException e ) {
// fall through and throw
}
throw new NoSuchElementException( "Failed to lookup path: " + arg0.getLocalPath( ) );
}
};
private static//
Function<MetadataRequest, ByteArray> userDataFunc = new Function<MetadataRequest, ByteArray>( ) {
public ByteArray apply( MetadataRequest arg0 ) {
try ( final TransactionResource db = Entities.transactionFor( VmInstance.class ) ) {
final VmInstance instance = VmInstances.lookup( arg0.getVmInstanceId( ) );
final byte[] userData = instance.getUserData( );
if ( userData == null ) {
throw new NoSuchElementException( );
}
return ByteArray.newInstance( userData );
} catch ( NoSuchElementException e ) {
throw new NoSuchElementException( "Failed to lookup path: " + arg0.getLocalPath( ) );
}
}
};
private static//
Function<MetadataRequest, ByteArray> metaDataFunc = new Function<MetadataRequest, ByteArray>( ) {
public ByteArray apply( MetadataRequest arg0 ) {
try ( final TransactionResource db = Entities.transactionFor( VmInstance.class ) ) {
final VmInstance instance = VmInstances.lookup( arg0.getVmInstanceId() );
final String res = VmInstanceMetadata.getByKey( instance, arg0.getLocalPath() );
if ( res != null ) {
return ByteArray.newInstance( res );
}
} catch ( NoSuchElementException e ) {
// fall through and throw
}
throw new NoSuchElementException( "Failed to lookup path: " + arg0.getLocalPath( ) );
}
};
private static//
ConcurrentMap<String, Function<MetadataRequest, ByteArray>> publicMetadataEndpoints = new ConcurrentSkipListMap<String, Function<MetadataRequest, ByteArray>>( ) {
{
put( "",
new Function<MetadataRequest, ByteArray>( ) {
public ByteArray apply( MetadataRequest arg0 ) {
return ByteArray.newInstance( Joiner.on( "\n" ).join(
keySet( ) ) );
}
} );
}
};
private static//
ConcurrentMap<String, Function<MetadataRequest, ByteArray>> instanceMetadataEndpoints = new ConcurrentSkipListMap<String, Function<MetadataRequest, ByteArray>>( ) {
{
put( "",
new Function<MetadataRequest, ByteArray>( ) {
public ByteArray apply( MetadataRequest arg0 ) {
String listing = "";
for ( String key : keySet( ) ) try {
if ( !"".equals( key )
&& get( key ).apply( arg0 ) != null ) {
listing += key + "\n";
}
} catch ( final RuntimeException e ) {
if ( !Exceptions.isCausedBy( e, NoSuchElementException.class ) ) {
throw e;
}
}
listing = listing.replaceAll( "\n$", "" );
return ByteArray.newInstance( listing );
}
} );
put( "dynamic", cache( dynamicFunc, VmInstances.VM_METADATA_INSTANCE_CACHE ) );
put( "user-data", cache( userDataFunc, VmInstances.VM_METADATA_USER_DATA_CACHE ) );
put( "meta-data", cache( metaDataFunc, VmInstances.VM_METADATA_INSTANCE_CACHE ) );
}
};
private static//
ConcurrentMap<String, Function<MetadataRequest, ByteArray>> //
systemMetadataEndpoints = new ConcurrentSkipListMap<String, Function<MetadataRequest, ByteArray>>( ) {
{
put( "",
new Function<MetadataRequest, ByteArray>( ) {
public ByteArray apply( MetadataRequest arg0 ) {
return ByteArray.newInstance( Joiner.on(
"\n" ).join(
keySet( ) ) );
}
} );
put( "sensors-conf", new SensorsConfigMetadata( ) );
}
};
private static final Supplier<Set<NetworkingFeature>> networkingFeatureSupplier =
Suppliers.memoizeWithExpiration( new Supplier<Set<NetworkingFeature>>( ) {
@Override
public Set<NetworkingFeature> get( ) {
return Networking.getInstance( ).describeFeatures( );
}
}, 30, TimeUnit.SECONDS );
private static final LoadingCache<String, Optional<String>> ipToVmIdCache =
cache( resolveVm(), VmInstances.VM_METADATA_REQUEST_CACHE );
private static <K,V> LoadingCache<K,V> cache( final Function<K,V> loader,
final String cacheSpec ) {
return CacheBuilder
.from( CacheBuilderSpec.parse( cacheSpec ) )
.build( CacheLoader.from( loader ) );
}
private static Function<String,Optional<String>> resolveVm( ) {
return new Function<String,Optional<String>>() {
@Nullable
@Override
public Optional<String> apply( final String requestIp ) {
VmInstance findVm = null;
if ( !Databases.isVolatile() ) {
try {
findVm = VmInstances.lookupByPublicIp( requestIp );
} catch ( Exception ex2 ) {
try {
findVm = VmInstances.lookupByPrivateIp( requestIp );
} catch ( Exception ex ) {
Logs.exhaust().error( ex );
}
}
}
return Optional.fromNullable( findVm ).transform( CloudMetadatas.toDisplayName( ) );
}
};
}
/**
* @return byte[] for content or String for expected error
*/
public Object handle( final String path ) {
final String[] parts = path.split( ":", 2 );
try {
final String requestIpOrInstanceId = ResourceIdentifiers.tryNormalize( ).apply( parts[0] );
final boolean isInstanceId = requestIpOrInstanceId.startsWith( "i-" );
final MetadataRequest request = new MetadataRequest(
isInstanceId ? "127.0.0.1" : requestIpOrInstanceId,
parts.length == 2 ?
parts[1] :
"/",
isInstanceId ? Optional.of( requestIpOrInstanceId ) : ipToVmIdCache.get( requestIpOrInstanceId ) );
if ( instanceMetadataEndpoints.containsKey( request.getMetadataName( ) ) && request.isInstance( ) ) {
if ( ( isInstanceId && !networkingFeatureSupplier.get( ).contains( NetworkingFeature.Vpc ) ) ||
( !isInstanceId && !networkingFeatureSupplier.get( ).contains( NetworkingFeature.Classic ) ) ) {
throw new NoSuchElementException( "Metadata request failed (invalid for platform): " + path );
}
return instanceMetadataEndpoints.get( request.getMetadataName( ) ).apply( request ).getBytes( );
} else if ( systemMetadataEndpoints.containsKey( request.getMetadataName( ) ) && request.isSystem( ) ) {
return systemMetadataEndpoints.get( request.getMetadataName( ) ).apply( request ).getBytes( );
} else if ( publicMetadataEndpoints.containsKey( request.getMetadataName( ) ) ) {
return publicMetadataEndpoints.get( request.getMetadataName( ) ).apply( request ).getBytes( );
} else {
return "Metadata request failed: " + path;
}
} catch ( Exception ex ) {
NoSuchElementException noSuchElementException = Exceptions.findCause( ex, NoSuchElementException.class );
if ( noSuchElementException != null ) throw noSuchElementException;
String errorMsg = "Metadata request failed: " + path + ( Logs.isExtrrreeeme( )
? " cause: " + ex.getMessage( )
: "" );
LOG.error( errorMsg, ex );
throw Exceptions.toUndeclared( ex );
}
}
}