telegraf/plugins/inputs/docker

Docker Input Plugin

The docker plugin uses the docker remote API to gather metrics on running docker containers. You can read Docker's documentation for their remote API here

The docker plugin uses the excellent fsouza go-dockerclient library to gather stats. Documentation for the library can be found here and documentation for the stat structure can be found here

Configuration:

# Read metrics about docker containers
[[inputs.docker]]
  # Docker Endpoint
  #   To use TCP, set endpoint = "tcp://[ip]:[port]"
  #   To use environment variables (ie, docker-machine), set endpoint = "ENV"
  endpoint = "unix:///var/run/docker.sock"
  # Only collect metrics for these containers, collect all if empty
  container_names = []
  calculate_percentages = false

Calculate Percentages

Optionally percentages can be calculated for cpu and memory usage. This uses the same calculation as the 'docker stats' command line tool. Set this option to 'true' to enable this feature.

Measurements & Fields:

Every effort was made to preserve the names based on the JSON response from the docker API.

Note that the docker_cpu metric may appear multiple times per collection, based on the availability of per-cpu stats on your system.

• docker_mem
  • total_pgmafault
  • cache
  • mapped_file
  • total_inactive_file
  • pgpgout
  • rss
  • total_mapped_file
  • writeback
  • unevictable
  • pgpgin
  • total_unevictable
  • pgmajfault
  • total_rss
  • total_rss_huge
  • total_writeback
  • total_inactive_anon
  • rss_huge
  • hierarchical_memory_limit
  • total_pgfault
  • total_active_file
  • active_anon
  • total_active_anon
  • total_pgpgout
  • total_cache
  • inactive_anon
  • active_file
  • pgfault
  • inactive_file
  • total_pgpgin
  • max_usage
  • usage
  • failcnt
  • limit
• docker_cpu
  • throttling_periods
  • throttling_throttled_periods
  • throttling_throttled_time
  • usage_in_kernelmode
  • usage_in_usermode
  • usage_system
  • usage_total
• docker_net
  • rx_dropped
  • rx_bytes
  • rx_errors
  • tx_packets
  • tx_dropped
  • rx_packets
  • tx_errors
  • tx_bytes
• docker_blkio
  • io_service_bytes_recursive_async
  • io_service_bytes_recursive_read
  • io_service_bytes_recursive_sync
  • io_service_bytes_recursive_total
  • io_service_bytes_recursive_write
  • io_serviced_recursive_async
  • io_serviced_recursive_read
  • io_serviced_recursive_sync
  • io_serviced_recursive_total
  • io_serviced_recursive_write

Tags:

• All stats have the following tags:
  • cont_id (container ID)
  • cont_image (container image)
  • cont_name (container name)
• docker_cpu specific:
  • cpu
• docker_net specific:
  • network
• docker_blkio specific:
  • device

Example Output:

% ./telegraf -config ~/ws/telegraf.conf -input-filter docker -test
* Plugin: docker, Collection 1
> docker_mem,cont_id=5705ba8ed8fb47527410653d60a8bb2f3af5e62372297c419022a3cc6d45d848,\
cont_image=spotify/kafka,cont_name=kafka \
active_anon=52568064i,active_file=6926336i,cache=12038144i,fail_count=0i,\
hierarchical_memory_limit=9223372036854771712i,inactive_anon=52707328i,\
inactive_file=5111808i,limit=1044578304i,mapped_file=10301440i,\
max_usage=140656640i,pgfault=63762i,pgmajfault=2837i,pgpgin=73355i,\
pgpgout=45736i,rss=105275392i,rss_huge=4194304i,total_active_anon=52568064i,\
total_active_file=6926336i,total_cache=12038144i,total_inactive_anon=52707328i,\
total_inactive_file=5111808i,total_mapped_file=10301440i,total_pgfault=63762i,\
total_pgmafault=0i,total_pgpgin=73355i,total_pgpgout=45736i,\
total_rss=105275392i,total_rss_huge=4194304i,total_unevictable=0i,\
total_writeback=0i,unevictable=0i,usage=117440512i,writeback=0i 1453409536840126713
> docker_cpu,cont_id=5705ba8ed8fb47527410653d60a8bb2f3af5e62372297c419022a3cc6d45d848,\
cont_image=spotify/kafka,cont_name=kafka,cpu=cpu-total \
throttling_periods=0i,throttling_throttled_periods=0i,\
throttling_throttled_time=0i,usage_in_kernelmode=440000000i,\
usage_in_usermode=2290000000i,usage_system=84795360000000i,\
usage_total=6628208865i 1453409536840126713
> docker_cpu,cont_id=5705ba8ed8fb47527410653d60a8bb2f3af5e62372297c419022a3cc6d45d848,\
cont_image=spotify/kafka,cont_name=kafka,cpu=cpu0 \
usage_total=6628208865i 1453409536840126713
> docker_net,cont_id=5705ba8ed8fb47527410653d60a8bb2f3af5e62372297c419022a3cc6d45d848,\
cont_image=spotify/kafka,cont_name=kafka,network=eth0 \
rx_bytes=7468i,rx_dropped=0i,rx_errors=0i,rx_packets=94i,tx_bytes=946i,\
tx_dropped=0i,tx_errors=0i,tx_packets=13i 1453409536840126713
> docker_blkio,cont_id=5705ba8ed8fb47527410653d60a8bb2f3af5e62372297c419022a3cc6d45d848,\
cont_image=spotify/kafka,cont_name=kafka,device=8:0 \
io_service_bytes_recursive_async=80216064i,io_service_bytes_recursive_read=79925248i,\
io_service_bytes_recursive_sync=77824i,io_service_bytes_recursive_total=80293888i,\
io_service_bytes_recursive_write=368640i,io_serviced_recursive_async=6562i,\
io_serviced_recursive_read=6492i,io_serviced_recursive_sync=37i,\
io_serviced_recursive_total=6599i,io_serviced_recursive_write=107i 1453409536840126713