cpu_scale.tick

var cpu_percentile = stream
    |from()
        .measurement('docker_container_cpu')
        .where(lambda: "container_image" =~ /sharelatex-web/ AND "cpu" == 'cpu-total')
    |window()
        .period(30s)
        .every(1s)
    |mean('usage_percent')
    |log()

var scale_out = cpu_percentile
    @scale()
        .simulate(FALSE)
        .debug(TRUE)
        .name('web')
        .when('mean > 20')
        .by('current + 1')
        .min_instances(1)
        .max_instances(10)
        .cooldown('20s')

var scale_in = cpu_percentile
    @scale()
        .simulate(FALSE)
        .debug(TRUE)
        .name('web')
        .when('mean < 2')
        .by('current - 1')
        .min_instances(1)
        .max_instances(10)
        .cooldown('20s')

scale_out
    |influxDBOut()
        .database('metrics')
        .measurement('autoscaling')
        .flushInterval(1d)
        .buffer(1)

scale_in
    |influxDBOut()
        .database('metrics')
        .measurement('autoscaling')
        .flushInterval(1d)
        .buffer(1)