/*
* 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.apache.brooklyn.entity.machine;
import java.util.List;
import java.util.concurrent.TimeoutException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.brooklyn.core.effector.ssh.SshEffectorTasks;
import org.apache.brooklyn.core.location.Machines;
import org.apache.brooklyn.entity.software.base.AbstractSoftwareProcessSshDriver;
import org.apache.brooklyn.entity.software.base.EmptySoftwareProcessDriver;
import org.apache.brooklyn.entity.software.base.EmptySoftwareProcessImpl;
import org.apache.brooklyn.feed.ssh.SshFeed;
import org.apache.brooklyn.feed.ssh.SshPollConfig;
import org.apache.brooklyn.feed.ssh.SshPollValue;
import org.apache.brooklyn.location.ssh.SshMachineLocation;
import org.apache.brooklyn.util.core.task.DynamicTasks;
import org.apache.brooklyn.util.core.task.system.ProcessTaskWrapper;
import org.apache.brooklyn.util.exceptions.Exceptions;
import org.apache.brooklyn.util.text.Strings;
import org.apache.brooklyn.util.time.Duration;
import com.google.common.base.Function;
import com.google.common.base.Functions;
import com.google.common.base.Splitter;
public class MachineEntityImpl extends EmptySoftwareProcessImpl implements MachineEntity {
private static final Logger LOG = LoggerFactory.getLogger(MachineEntityImpl.class);
static {
MachineAttributes.init();
}
private transient SshFeed sensorFeed;
@Override
public void init() {
LOG.info("Starting server pool machine with id {}", getId());
super.init();
}
@Override
protected void connectSensors() {
super.connectSensors();
// Sensors linux-specific
if (!getMachine().getMachineDetails().getOsDetails().isLinux()) return;
sensorFeed = SshFeed.builder()
.entity(this)
.period(Duration.THIRTY_SECONDS)
.poll(new SshPollConfig<Duration>(UPTIME)
.command("cat /proc/uptime")
.onFailureOrException(Functions.<Duration>constant(null))
.onSuccess(new Function<SshPollValue, Duration>() {
@Override
public Duration apply(SshPollValue input) {
return Duration.seconds( Double.valueOf( Strings.getFirstWord(input.getStdout()) ) );
}
}))
.poll(new SshPollConfig<Double>(LOAD_AVERAGE)
.command("uptime")
.onFailureOrException(Functions.constant(-1d))
.onSuccess(new Function<SshPollValue, Double>() {
@Override
public Double apply(SshPollValue input) {
String loadAverage = Strings.getFirstWordAfter(input.getStdout(), "load average:").replace(",", "");
return Double.valueOf(loadAverage);
}
}))
.poll(new SshPollConfig<Double>(CPU_USAGE)
.command("cat /proc/stat")
.onFailureOrException(Functions.constant(-1d))
.onSuccess(new Function<SshPollValue, Double>() {
@Override
public Double apply(SshPollValue input) {
List<String> cpuData = Splitter.on(" ").omitEmptyStrings().splitToList(Strings.getFirstLine(input.getStdout()));
Integer system = Integer.parseInt(cpuData.get(1));
Integer user = Integer.parseInt(cpuData.get(3));
Integer idle = Integer.parseInt(cpuData.get(4));
return (double) (system + user) / (double) (system + user + idle);
}
}))
.poll(new SshPollConfig<Long>(USED_MEMORY)
.command("free | grep Mem:")
.onFailureOrException(Functions.constant(-1L))
.onSuccess(new Function<SshPollValue, Long>() {
@Override
public Long apply(SshPollValue input) {
List<String> memoryData = Splitter.on(" ").omitEmptyStrings().splitToList(Strings.getFirstLine(input.getStdout()));
return Long.parseLong(memoryData.get(2));
}
}))
.poll(new SshPollConfig<Long>(FREE_MEMORY)
.command("free | grep Mem:")
.onFailureOrException(Functions.constant(-1L))
.onSuccess(new Function<SshPollValue, Long>() {
@Override
public Long apply(SshPollValue input) {
List<String> memoryData = Splitter.on(" ").omitEmptyStrings().splitToList(Strings.getFirstLine(input.getStdout()));
return Long.parseLong(memoryData.get(3));
}
}))
.poll(new SshPollConfig<Long>(TOTAL_MEMORY)
.command("free | grep Mem:")
.onFailureOrException(Functions.constant(-1L))
.onSuccess(new Function<SshPollValue, Long>() {
@Override
public Long apply(SshPollValue input) {
List<String> memoryData = Splitter.on(" ").omitEmptyStrings().splitToList(Strings.getFirstLine(input.getStdout()));
return Long.parseLong(memoryData.get(1));
}
}))
.build();
}
@Override
public void disconnectSensors() {
if (sensorFeed != null) sensorFeed.stop();
super.disconnectSensors();
}
@Override
public Class<?> getDriverInterface() {
return EmptySoftwareProcessDriver.class;
}
public SshMachineLocation getMachine() {
return Machines.findUniqueMachineLocation(getLocations(), SshMachineLocation.class).get();
}
@Override
public String execCommand(String command) {
return execCommandTimeout(command, Duration.ONE_MINUTE);
}
@Override
public String execCommandTimeout(String command, Duration timeout) {
AbstractSoftwareProcessSshDriver driver = (AbstractSoftwareProcessSshDriver) getDriver();
if (driver == null) {
throw new NullPointerException("No driver for "+this);
}
ProcessTaskWrapper<String> task = SshEffectorTasks.ssh(command)
.environmentVariables(driver.getShellEnvironment())
.requiringZeroAndReturningStdout()
.machine(getMachine())
.summary(command)
.newTask();
try {
String result = DynamicTasks.queueIfPossible(task)
.executionContext(this)
.orSubmitAsync()
.asTask()
.get(timeout);
return result;
} catch (TimeoutException te) {
throw new IllegalStateException("Timed out running command: " + command);
} catch (Exception e) {
Integer exitCode = task.getExitCode();
LOG.warn("Command failed, return code {}: {}", exitCode == null ? -1 : exitCode, task.getStderr());
throw Exceptions.propagate(e);
}
}
}