sampler.yml

variables:
  sshconnection: ssh -i ~/my-key-pair.pem ec2-user@1.2.3.4
textboxes:
  - title: SSH
    pty: true
    init: $sshconnection
    sample: top
runcharts:
  - title: Search engine response time
    rate-ms: 500        # sampling rate, default = 1000
    scale: 2            # number of digits after sample decimal point, default = 1
    legend:
      enabled: true     # enables item labels, default = true
      details: false    # enables item statistics: cur/min/max/dlt values, default = true
    items:
      - label: GOOGLE
        sample: curl -o /dev/null -s -w '%{time_total}'  https://www.google.com
        color: 178      # 8-bit color number, default one is chosen from a pre-defined palette
      - label: YAHOO
        sample: curl -o /dev/null -s -w '%{time_total}'  https://search.yahoo.com
      - label: BING
        sample: curl -o /dev/null -s -w '%{time_total}'  https://www.bing.com
itextboxes:
  - title: Docker containers stats
    sample: docker stats --no-stream --format "table {{.Name}}\t{{.CPUPerc}}\t{{.MemPerc}}\t{{.MemUsage}}\t{{.NetIO}}\t{{.BlockIO}}\t{{.PIDs}}"
# sparklines:
#   - title: CPU usage
#     sample: ps -A -o %cpu | awk '{s+=$1} END {print s}
# textboxes:
#   - title: MongoDB polling
#     rate-ms: 500
#     init: mongo --quiet --host=localhost test # executes only once to start the interactive session
#     sample: Date.now();                       # executes with a required rate, in scope of the interactive session
#     transform: echo result = $sample          # executes in scope of local session, $sample variable is available for transformation
asciiboxes:
  - title: UTC time
    rate-ms: 500        # sampling rate, default = 1000
    font: 3d            # font type, default = 2d
    border: false       # border around the item, default = true    
    color: 43           # 8-bit color number, default is white
    sample: env TZ=UTC date +%r
# runcharts:
#   - title: SEARCH ENGINE RESPONSE TIME (sec)
#     rate-ms: 200
#     items:
#       - label: GOOGLE
#         sample: curl -o /dev/null -s -w '%{time_total}'  https://www.google.com
#       - label: YAHOO
#         sample: curl -o /dev/null -s -w '%{time_total}'  https://search.yahoo.com
sparklines:
  - title: CPU usage
    rate-ms: 200
    scale: 0
    sample: ps -A -o %cpu | awk '{s+=$1} END {print s}'
  - title: Free memory pages
    rate-ms: 200
    scale: 0
    sample: memory_pressure | grep 'Pages free' | awk '{print $3}'
triggers:
  - title: Latency threshold exceeded
    condition: echo "$prev < 0.3 && $cur > 0.3" |bc -l  # expects "1" as TRUE indicator
    actions:
      terminal-bell: true  # standard terminal bell, default = false
      sound: true   # NASA quindar tone, default = false
      visual: true  # visual notification on top of the component area, default = false
      script: 'say alert: ${label} latency exceeded ${cur} second' # an arbitrary script, which can use $cur, $prev and $label variables
gauges:
  - title: Minute progress
    rate-ms: 500        # sampling rate, default = 1000
    scale: 2            # number of digits after sample decimal point, default = 1
    percent-only: false # toggle display of the current value, default = false
    color: 178          # 8-bit color number, default one is chosen from a pre-defined palette
    cur:
      sample: date +%S  # sample script for current value
    max:
      sample: echo 60   # sample script for max value
    min:
      sample: echo 0    # sample script for min value
  - title: Year progress
    cur:
      sample: date +%j
    max:
      sample: echo 365
    min:
      sample: echo 0
      
barcharts:
  - title: Local network activity
    rate-ms: 500        # sampling rate, default = 1000
    scale: 0            # number of digits after sample decimal point, default = 1
    items:
      - label: UDP bytes in
        sample: nettop -J bytes_in -l 1 -m udp | awk '{sum += $4} END {print sum}'
      - label: UDP bytes out
        sample: nettop -J bytes_out -l 1 -m udp | awk '{sum += $4} END {print sum}'
      - label: TCP bytes in
        sample: nettop -J bytes_in -l 1 -m tcp | awk '{sum += $4} END {print sum}'
      - label: TCP bytes out
        sample: nettop -J bytes_out -l 1 -m tcp | awk '{sum += $4} END {print sum}'