Hallo zusammen,
ist schon eine ganze weile her, dass ich mit tobis rrdtool etwas gemacht habe, und bin wohl etwas eingerostet. Ich versuche aktuell die Festplattenaktivitäten aufzuzeichnen, mit folgendem Script (wird von cron jede Minute aufgerufen):
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#!/usr/bin/env bash
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path=/var/lib/rrd/disk_io
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drivestat=$(iostat -o JSON)
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timestamp=$(date +%s)
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echo ${drivestat} | jq -c '.[].hosts.[]' | while read -r node; do
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nodename=$(echo ${node} | jq -r .nodename)
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echo ${node} | jq -c '.statistics.[].disk.[]' | while read -r drive; do
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name=$(echo ${drive} | jq -r .disk_device)
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filename=${path}/${nodename}_${name}.rrd
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kb_read=$(echo ${drive} | jq -r .kB_read)
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kb_wrtn=$(echo ${drive} | jq -r .kB_wrtn)
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if [ ! -f filename ]; then
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rrdcreate ${filename} \
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--step=60s \
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DS:read:GAUGE:90s:0:U \
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DS:wrtn:GAUGE:90s:0:U \
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RRA:AVERAGE:0.5:60s:14d \
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RRA:MIN:0.5:60s:14d \
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RRA:MAX:0.5:60s:14d \
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RRA:AVERAGE:0.5:300s:62d \
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RRA:MIN:0.5:300s:62d \
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RRA:MAX:0.5:300s:62d \
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RRA:AVERAGE:0.5:1h:366d \
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RRA:MIN:0.5:1h:366d \
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RRA:MAX:0.5:1h:366d \
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RRA:AVERAGE:0.5:1d:3660d \
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RRA:MIN:0.5:1d:3660d \
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RRA:MAX:0.5:1d:3660d
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fi
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rrdupdate ${filename} ${timestamp}:$((${kb_read}*1024)):$((${kb_wrtn}*1024))
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done
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done
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Die Daten kommen auch in der rrd Datenbank an (siehe ds[read].last_ds und ds[wrtn].last_ds:
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$ rrdtool info /var/lib/rrd/disk_io/server_sda.rrd
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filename = "/var/lib/rrd/disk_io/server_sda.rrd"
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rrd_version = "0003"
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step = 60
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last_update = 1731588631
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header_size = 4064
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ds[read].index = 0
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ds[read].type = "GAUGE"
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ds[read].minimal_heartbeat = 90
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ds[read].min = 0.0000000000e+00
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ds[read].max = NaN
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ds[read].last_ds = "12205752320"
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ds[read].value = 1.2205752320e+11
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ds[read].unknown_sec = 21
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ds[wrtn].index = 1
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ds[wrtn].type = "GAUGE"
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ds[wrtn].minimal_heartbeat = 90
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ds[wrtn].min = 0.0000000000e+00
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ds[wrtn].max = NaN
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ds[wrtn].last_ds = "13989277696"
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ds[wrtn].value = 1.3989277696e+11
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ds[wrtn].unknown_sec = 21
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rra[0].cf = "AVERAGE"
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rra[0].rows = 20160
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rra[0].cur_row = 14188
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rra[0].pdp_per_row = 1
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rra[0].xff = 5.0000000000e-01
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rra[0].cdp_prep[0].value = NaN
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rra[0].cdp_prep[0].unknown_datapoints = 0
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rra[0].cdp_prep[1].value = NaN
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rra[0].cdp_prep[1].unknown_datapoints = 0
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rra[1].cf = "MIN"
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rra[1].rows = 20160
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rra[1].cur_row = 1277
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rra[1].pdp_per_row = 1
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rra[1].xff = 5.0000000000e-01
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rra[1].cdp_prep[0].value = NaN
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rra[1].cdp_prep[0].unknown_datapoints = 0
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rra[1].cdp_prep[1].value = NaN
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rra[1].cdp_prep[1].unknown_datapoints = 0
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[...]
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Allerdings kann ich keine Daten daraus fetchen:
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$ rrdtool fetch /var/lib/rrd/disk_io/server_sda.rrd AVERAGE -s -10m
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read wrtn
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1731588540: -nan -nan
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1731588600: -nan -nan
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1731588660: -nan -nan
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1731588720: -nan -nan
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1731588780: -nan -nan
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1731588840: -nan -nan
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1731588900: -nan -nan
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1731588960: -nan -nan
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1731589020: -nan -nan
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1731589080: -nan -nan
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1731589140: -nan -nan
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Kann mir da mal jemdand auf die Sprünge helfen?
Danke, Edi
