Docker Container for IO Benchmarking


docker

I had a need this week for a quick-and-easy IO benchmarking tool and decided to create a Docker container to achieve my goals. The Docker container itself is rather simple and is available for use at your leisure. The Docker container is based off of Ubuntu latest, installs the FIO package and grabs a simple test file from my website for generating load and benchmarking results.

Dockerfile

  1 # FIO benchmark on Ubuntu:latest
  2 
  3 FROM ubuntu:latest
  4 MAINTAINER Chris Mutchler <chris@virtualelephant.com>
  5 
  6 RUN apt-get update
  7 RUN apt-get -y install fio wget
  8 RUN wget http://virtualelephant.com/wp-content/uploads/2015/10/threads.txt
  9 
 10 CMD [ "/bin/bash" ]

Once I had the Docker image uploaded to my repo, I created a simple JSON file for deploying the container into my Mesos cluster.

iobench.json

{
  "container": {
    "type": "DOCKER",
    "docker": {
      "image": "chrismutchler/iobench"
    }    
  },
  "id": "iobench",
  "instances": 1,
  "cpus": 0.25,
  "mem": 256,
  "uris": [],
  "cmd": "while true; do date; /usr/bin/fio /threads.txt; sleep 10; done"
}

As noted, the Docker container will continue to run the FIO test infinitely until the app is destroyed in Marathon. The app can also be scaled to run across multiple Apache Mesos nodes, each running the FIO test independently. Be careful when running any sort of load or benchmarking test in your environments, it may have adverse effects.

Launching the application in Marathon was simple enough from the command line.

# curl -A POST http://mesos.local.domain:8080/v2/apps -d @iobench.json -H "Content-Type: application/json"

I used the test to create a noisy neighbor issue in my environment to test out VMware Storage IO Control (SIOC) settings and it worked adequately in this role. Once the application had been launched, the results are available for downloading or viewing in the Mesos UI, by selecting ‘Sandbox’ and then the STDOUT log file. To understand what FIO is performing for the IO benchmark, please read the blog post by Ben Martin where I copied the FIO test file from.

stdout

--container="mesos-20151009-234723-2583865536-5050-2901-S1.c0052620-2322-4d12-aa49-1e3b24402f50" --docker="docker" --help="false" --initialize_driver_logging="true" --logbufsecs="0" --logging_level="INFO" --mapped_directory="/mnt/mesos/sandbox" --quiet="false" --sandbox_directory="/tmp/mesos/slaves/20151009-234723-2583865536-5050-2901-S1/frameworks/20151009-234723-2583865536-5050-2901-0001/executors/iobench.cb93c618-6eea-11e5-9209-0050569a4da8/runs/c0052620-2322-4d12-aa49-1e3b24402f50" --stop_timeout="0ns"
--container="mesos-20151009-234723-2583865536-5050-2901-S1.c0052620-2322-4d12-aa49-1e3b24402f50" --docker="docker" --help="false" --initialize_driver_logging="true" --logbufsecs="0" --logging_level="INFO" --mapped_directory="/mnt/mesos/sandbox" --quiet="false" --sandbox_directory="/tmp/mesos/slaves/20151009-234723-2583865536-5050-2901-S1/frameworks/20151009-234723-2583865536-5050-2901-0001/executors/iobench.cb93c618-6eea-11e5-9209-0050569a4da8/runs/c0052620-2322-4d12-aa49-1e3b24402f50" --stop_timeout="0ns"
Registered docker executor on dhcp2-157.local.domain
Starting task iobench.cb93c618-6eea-11e5-9209-0050569a4da8
Sat Oct 10 01:04:40 UTC 2015
bgwriter: (g=0): rw=randwrite, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32
queryA: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=mmap, iodepth=1
queryB: (g=0): rw=randread, bs=4K-4K/4K-4K/4K-4K, ioengine=mmap, iodepth=1
bgupdater: (g=0): rw=randrw, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=16
fio-2.1.3
Starting 4 processes
bgwriter: Laying out IO file(s) (1 file(s) / 256MB)
queryA: Laying out IO file(s) (1 file(s) / 256MB)
queryB: Laying out IO file(s) (1 file(s) / 256MB)
bgupdater: Laying out IO file(s) (1 file(s) / 32MB)

bgwriter: (groupid=0, jobs=1): err= 0: pid=8: Sat Oct 10 01:05:32 2015
  write: io=262144KB, bw=11578KB/s, iops=2894, runt= 22641msec
    slat (usec): min=16, max=4713.1K, avg=334.93, stdev=20011.69
    clat (usec): min=9, max=4750.2K, avg=10711.15, stdev=112034.10
     lat (usec): min=75, max=4750.6K, avg=11048.59, stdev=113823.09
    clat percentiles (msec):
     |  1.00th=[    3],  5.00th=[    3], 10.00th=[    3], 20.00th=[    6],
     | 30.00th=[    6], 40.00th=[    7], 50.00th=[    7], 60.00th=[    7],
     | 70.00th=[    8], 80.00th=[    8], 90.00th=[    9], 95.00th=[    9],
     | 99.00th=[   16], 99.50th=[   31], 99.90th=[  947], 99.95th=[ 1582],
     | 99.99th=[ 4752]
    bw (KB  /s): min=    5, max=39208, per=100.00%, avg=15073.13, stdev=7536.85
    lat (usec) : 10=0.01%, 100=0.01%, 250=0.01%, 500=0.01%, 750=0.01%
    lat (usec) : 1000=0.01%
    lat (msec) : 2=0.05%, 4=12.47%, 10=85.23%, 20=1.46%, 50=0.34%
    lat (msec) : 250=0.05%, 500=0.19%, 750=0.05%, 1000=0.05%, 2000=0.05%
    lat (msec) : >=2000=0.05%
  cpu          : usr=2.60%, sys=8.83%, ctx=126969, majf=0, minf=26
  IO depths    : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=100.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.1%, 64=0.0%, >=64=0.0%
     issued    : total=r=0/w=65536/d=0, short=r=0/w=0/d=0
queryA: (groupid=0, jobs=1): err= 0: pid=9: Sat Oct 10 01:05:32 2015
  read : io=262144KB, bw=12106KB/s, iops=3026, runt= 21654msec
    clat (usec): min=26, max=4713.2K, avg=322.55, stdev=20018.65
     lat (usec): min=26, max=4713.2K, avg=322.77, stdev=20018.66
    clat percentiles (usec):
     |  1.00th=[   31],  5.00th=[   71], 10.00th=[   77], 20.00th=[  115],
     | 30.00th=[  126], 40.00th=[  155], 50.00th=[  159], 60.00th=[  165],
     | 70.00th=[  183], 80.00th=[  207], 90.00th=[  253], 95.00th=[  314],
     | 99.00th=[  724], 99.50th=[ 1012], 99.90th=[ 2576], 99.95th=[ 4384],
     | 99.99th=[272384]
    bw (KB  /s): min=    7, max=24840, per=67.92%, avg=16686.43, stdev=7338.70
    lat (usec) : 50=4.04%, 100=11.27%, 250=74.04%, 500=8.29%, 750=1.42%
    lat (usec) : 1000=0.45%
    lat (msec) : 2=0.36%, 4=0.09%, 10=0.03%, 20=0.01%, 50=0.01%
    lat (msec) : 100=0.01%, 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%
    lat (msec) : 2000=0.01%, >=2000=0.01%
  cpu          : usr=2.93%, sys=7.36%, ctx=131487, majf=65536, minf=31
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=65536/w=0/d=0, short=r=0/w=0/d=0
queryB: (groupid=0, jobs=1): err= 0: pid=10: Sat Oct 10 01:05:32 2015
  read : io=262144KB, bw=11910KB/s, iops=2977, runt= 22010msec
    clat (usec): min=27, max=4714.3K, avg=325.85, stdev=20020.01
     lat (usec): min=27, max=4714.3K, avg=326.11, stdev=20020.01
    clat percentiles (usec):
     |  1.00th=[   32],  5.00th=[   72], 10.00th=[   82], 20.00th=[  117],
     | 30.00th=[  139], 40.00th=[  155], 50.00th=[  159], 60.00th=[  169],
     | 70.00th=[  187], 80.00th=[  213], 90.00th=[  262], 95.00th=[  318],
     | 99.00th=[  700], 99.50th=[  980], 99.90th=[ 2608], 99.95th=[ 4768],
     | 99.99th=[272384]
    bw (KB  /s): min=    2, max=23384, per=65.75%, avg=16152.90, stdev=6882.55
    lat (usec) : 50=2.90%, 100=9.19%, 250=76.15%, 500=9.50%, 750=1.34%
    lat (usec) : 1000=0.43%
    lat (msec) : 2=0.32%, 4=0.09%, 10=0.03%, 20=0.01%, 50=0.01%
    lat (msec) : 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%, 2000=0.01%
    lat (msec) : >=2000=0.01%
  cpu          : usr=3.81%, sys=6.74%, ctx=131493, majf=65536, minf=30
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=65536/w=0/d=0, short=r=0/w=0/d=0
bgupdater: (groupid=0, jobs=1): err= 0: pid=11: Sat Oct 10 01:05:32 2015
  read : io=16416KB, bw=3611.1KB/s, iops=902, runt=  4545msec
    slat (usec): min=81, max=285023, avg=520.41, stdev=5536.65
    clat (usec): min=1, max=2841, avg= 5.40, stdev=80.88
     lat (usec): min=115, max=285031, avg=528.39, stdev=5537.20
    clat percentiles (usec):
     |  1.00th=[    2],  5.00th=[    2], 10.00th=[    2], 20.00th=[    2],
     | 30.00th=[    2], 40.00th=[    2], 50.00th=[    2], 60.00th=[    2],
     | 70.00th=[    2], 80.00th=[    3], 90.00th=[    3], 95.00th=[    3],
     | 99.00th=[    3], 99.50th=[    6], 99.90th=[ 1448], 99.95th=[ 2384],
     | 99.99th=[ 2832]
    bw (KB  /s): min= 2096, max= 4472, per=14.60%, avg=3587.00, stdev=1065.00
  write: io=16352KB, bw=3597.9KB/s, iops=899, runt=  4545msec
    slat (usec): min=74, max=254089, avg=489.47, stdev=3971.19
    clat (usec): min=1, max=2233, avg= 5.13, stdev=66.52
     lat (usec): min=77, max=254096, avg=497.09, stdev=3971.57
    clat percentiles (usec):
     |  1.00th=[    2],  5.00th=[    2], 10.00th=[    2], 20.00th=[    2],
     | 30.00th=[    2], 40.00th=[    2], 50.00th=[    2], 60.00th=[    2],
     | 70.00th=[    2], 80.00th=[    3], 90.00th=[    3], 95.00th=[    3],
     | 99.00th=[    3], 99.50th=[    5], 99.90th=[ 1256], 99.95th=[ 1816],
     | 99.99th=[ 2224]
    bw (KB  /s): min= 2024, max= 4504, per=28.58%, avg=3514.88, stdev=1085.81
    lat (usec) : 2=0.04%, 4=99.26%, 10=0.24%, 50=0.18%, 100=0.04%
    lat (usec) : 250=0.06%, 500=0.02%, 750=0.01%, 1000=0.01%
    lat (msec) : 2=0.07%, 4=0.06%
  cpu          : usr=8.30%, sys=4.71%, ctx=16460, majf=0, minf=25
  IO depths    : 1=99.8%, 2=0.1%, 4=0.1%, 8=0.1%, 16=0.1%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued    : total=r=4104/w=4088/d=0, short=r=0/w=0/d=0

Run status group 0 (all jobs):
   READ: io=540704KB, aggrb=24566KB/s, minb=3611KB/s, maxb=12106KB/s, mint=4545msec, maxt=22010msec
  WRITE: io=278496KB, aggrb=12300KB/s, minb=3597KB/s, maxb=11578KB/s, mint=4545msec, maxt=22641msec

Disk stats (read/write):
    dm-2: ios=135188/67188, merge=0/0, ticks=39356/28285, in_queue=67640, util=97.96%, aggrios=135217/70245, aggrmerge=0/0, aggrticks=1492/4673, aggrin_queue=6169, aggrutil=15.06%
    dm-0: ios=135217/70245, merge=0/0, ticks=1492/4673, in_queue=6169, util=15.06%, aggrios=0/0, aggrmerge=0/0, aggrticks=0/0, aggrin_queue=0, aggrutil=0.00%
  loop1: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%
  loop0: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00%

If you would like to grab the Docker image and use it for your own needs, you can pull it from Docker Hub:

# docker pull chrismutchler/iobench

One of the next little Docker containers I will be building is a web page traffic generator — I’ve used all sorts of traffic testing applications in the past, but being able to spin up a test inside a Docker container and then scale it across a large Mesos cluster will simplify things even more!

Enjoy!