/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jclouds.compute.callables;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import org.jclouds.compute.domain.ExecResponse;
import org.jclouds.compute.domain.NodeMetadata;
import org.jclouds.compute.domain.NodeMetadataBuilder;
import org.jclouds.compute.events.InitScriptOnNodeSubmission;
import org.jclouds.compute.events.StatementOnNodeCompletion;
import org.jclouds.compute.events.StatementOnNodeFailure;
import org.jclouds.compute.options.RunScriptOptions;
import org.jclouds.domain.LoginCredentials;
import org.jclouds.scriptbuilder.InitScript;
import org.jclouds.scriptbuilder.domain.AdminAccessVisitor;
import org.jclouds.scriptbuilder.domain.AppendFile;
import org.jclouds.scriptbuilder.domain.OsFamily;
import org.jclouds.scriptbuilder.domain.Statement;
import org.jclouds.scriptbuilder.domain.Statements;
import org.jclouds.scriptbuilder.statements.login.AdminAccess;
import org.jclouds.ssh.SshClient;
import org.jclouds.ssh.SshException;
import com.google.common.base.Function;
import com.google.common.base.Splitter;
import com.google.common.base.Throwables;
import com.google.common.eventbus.EventBus;
import com.google.inject.assistedinject.Assisted;
import com.google.inject.assistedinject.AssistedInject;
/**
*
* @author Adrian Cole
*/
public class RunScriptOnNodeAsInitScriptUsingSsh extends SudoAwareInitManager implements RunScriptOnNode {
protected final EventBus eventBus;
@AssistedInject
public RunScriptOnNodeAsInitScriptUsingSsh(Function<NodeMetadata, SshClient> sshFactory, EventBus eventBus,
InitScriptConfigurationForTasks initScriptConfiguration, @Assisted NodeMetadata node,
@Assisted Statement script, @Assisted RunScriptOptions options) {
super(sshFactory, options.shouldRunAsRoot(), checkNotNull(node, "node"),
initScriptConfiguration, checkNotNull(script, "script") instanceof InitScript ? InitScript.class.cast(script)
: createInitScript(checkNotNull(initScriptConfiguration, "initScriptConfiguration"), options
.getTaskName(), script));
this.eventBus = checkNotNull(eventBus, "eventBus");
}
@Override
public RunScriptOnNodeAsInitScriptUsingSsh init() {
super.init();
return this;
}
@Override
public ExecResponse call() {
checkState(ssh != null, "please call init() before invoking call");
try {
ssh.connect();
ExecResponse returnVal = doCall();
eventBus.post(new StatementOnNodeCompletion(init, node, returnVal));
return returnVal;
} finally {
if (ssh != null)
ssh.disconnect();
}
}
public static InitScript createInitScript(InitScriptConfigurationForTasks config, String name, Statement script) {
if (name == null) {
name = "jclouds-script-" + config.getAnonymousTaskSuffixSupplier().get();
}
return InitScript.builder().name(name).home(config.getBasedir() + "/" + name).run(script).build();
}
protected void refreshSshIfNewAdminCredentialsConfigured(AdminAccess input) {
if (input.getAdminCredentials() != null && input.shouldGrantSudoToAdminUser()) {
ssh.disconnect();
logger.debug(">> reconnecting as %s@%s", input.getAdminCredentials().identity, ssh.getHostAddress());
ssh = sshFactory.apply(node = NodeMetadataBuilder.fromNodeMetadata(node)
.credentials(LoginCredentials.fromCredentials(input.getAdminCredentials())).build());
ssh.connect();
setupLinkToInitFile();
}
}
protected ExecResponse doCall() {
eventBus.post(new InitScriptOnNodeSubmission(init, node));
try {
try {
ssh.put(initFile, init.render(OsFamily.UNIX));
} catch (SshException e) {
// If there's a problem with the sftp configuration, we can try via
// ssh exec
if (logger.isTraceEnabled())
logger.warn(e, "<< (%s) problem using sftp [%s], attempting via sshexec", ssh.toString(), e.getMessage());
else
logger.warn("<< (%s) problem using sftp [%s], attempting via sshexec", ssh.toString(), e.getMessage());
ssh.disconnect();
ssh.connect();
ssh.exec("rm " + initFile);
ssh.exec(Statements.appendFile(initFile, Splitter.on('\n').split(init.render(OsFamily.UNIX)),
AppendFile.DELIMITER + "_" + init.getInstanceName()).render(OsFamily.UNIX));
}
ssh.exec("chmod 755 " + initFile);
setupLinkToInitFile();
runAction("init");
init.getInitStatement().accept(new AdminAccessVisitor() {
@Override
public void visit(AdminAccess input) {
refreshSshIfNewAdminCredentialsConfigured(input);
}
});
return runAction("start");
} catch (Throwable e) {
eventBus.post(new StatementOnNodeFailure(init, node, e));
throw Throwables.propagate(e);
}
}
protected void setupLinkToInitFile() {
ssh.exec(String.format("ln -fs %s %s", initFile, init.getInstanceName()));
}
}