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From grkvlt <...@git.apache.org>
Subject [GitHub] brooklyn-server pull request #204: Move machine metrics to SoftwareProcess e...
Date Thu, 16 Jun 2016 11:41:55 GMT
Github user grkvlt commented on a diff in the pull request:

    https://github.com/apache/brooklyn-server/pull/204#discussion_r67329989
  
    --- Diff: software/base/src/main/java/org/apache/brooklyn/entity/software/base/SoftwareProcessImpl.java
---
    @@ -287,6 +299,89 @@ protected void postDriverStart() {
          */
         protected void connectSensors() {
             connectedSensors = true;
    +        boolean retrieveMachineMetrics = config().get(RETRIEVE_MACHINE_METRICS);
    +        if (retrieveMachineMetrics) connectMachineSensors();
    +    }
    +
    +    /**
    +     * Adds sensors returning details about the machine the process is running on.
    +     * <p>
    +     * The machine must be SSHable and running Linux.
    +     */
    +    protected void connectMachineSensors() {
    +        Maybe<SshMachineLocation> location = Machines.findUniqueMachineLocation(getLocations(),
SshMachineLocation.class);
    +        if (location.isPresent() && location.get().getOsDetails().isLinux())
{
    +            machineSensorFeed = SshFeed.builder()
    +                    .entity(this)
    +                    .period(Duration.THIRTY_SECONDS)
    +                    .poll(SshPollConfig.forSensor(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(SshPollConfig.forSensor(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(SshPollConfig.forSensor(CPU_USAGE)
    +                            .command("cat /proc/stat")
    --- End diff --
    
    @ceeaspb I changed this to a command that sums the CPU field of the `ps` output, which
should work on almost all Linux machines


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