shell exporter

Shell scripts can now query Netdata:

eval "$(curl -s 'http://localhost:19999/api/v1/allmetrics')"

after this command, all the Netdata metrics are exposed to shell. Check:

# source the metrics

eval "$(curl -s 'http://localhost:19999/api/v1/allmetrics')"

# let's see if there are variables exposed by Netdata for system.cpu

set | grep "^NETDATA_SYSTEM_CPU"

NETDATA_SYSTEM_CPU_GUEST=0

NETDATA_SYSTEM_CPU_GUEST_NICE=0

NETDATA_SYSTEM_CPU_IDLE=95

NETDATA_SYSTEM_CPU_IOWAIT=0

NETDATA_SYSTEM_CPU_IRQ=0

NETDATA_SYSTEM_CPU_NICE=0

NETDATA_SYSTEM_CPU_SOFTIRQ=0

NETDATA_SYSTEM_CPU_STEAL=0

NETDATA_SYSTEM_CPU_SYSTEM=1

NETDATA_SYSTEM_CPU_USER=4

NETDATA_SYSTEM_CPU_VISIBLETOTAL=5

# let's see the total cpu utilization of the system

echo ${NETDATA_SYSTEM_CPU_VISIBLETOTAL}

5

# what about alarms?

set | grep "^NETDATA_ALARM_SYSTEM_SWAP_"

NETDATA_ALARM_SYSTEM_SWAP_USED_SWAP_STATUS=CLEAR

NETDATA_ALARM_SYSTEM_SWAP_USED_SWAP_VALUE=51

# let's get the current status of the alarm 'used swap'

echo ${NETDATA_ALARM_SYSTEM_SWAP_USED_SWAP_STATUS}

CLEAR

# is it fast?

time curl -s 'http://localhost:19999/api/v1/allmetrics' >/dev/null

real 0m0,070s

user 0m0,000s

sys 0m0,007s

# it is...

# 0.07 seconds for curl to be loaded, connect to Netdata and fetch the response back...

The _VISIBLETOTAL variable sums up all the dimensions of each chart.

The format of the variables is:

NETDATA_${chart_id^^}_${dimension_id^^}="${value}"

The value is rounded to the closest integer, since shell script cannot process decimal numbers.