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June 20, 2019 11:21
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script to scrape metrics from devicemapper, useful to use as metadata source
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| #!/bin/bash | |
| set -e | |
| set -o pipefail | |
| prometheus_format=${DEVICEMAPPER_PROMETHEUS:-true} # influxdb format otherwise | |
| function format_labels { | |
| first=true | |
| echo "$*" | tr , "\\n" | while read -r l; do | |
| label_name=${l%%=*} | |
| label_value=${l##*=} | |
| label_name=${label_name,,} # make label names lower case | |
| label_value=${label_value//\"} # remove quotes " | |
| if [[ -z "$label_value" ]]; then # empty labels | |
| label_value="-" | |
| elif [[ "$label_value" =~ " " ]]; then # labels with spaces | |
| label_value="${label_value// /\ }" # escape spaces | |
| fi | |
| if [[ "$first" == true ]]; then | |
| first=false | |
| else | |
| # add comma before all labels except first | |
| output+=, | |
| fi | |
| if [[ "$prometheus_format" == "true" ]]; then | |
| label_value="\"$label_value\"" | |
| fi | |
| output+="$label_name=$label_value" | |
| echo "$output" | |
| done | |
| } | |
| lsblk -nbpP -o SIZE,NAME,KNAME,PKNAME,PARTLABEL,STATE,TYPE,FSTYPE,MOUNTPOINT | sort -u | sed -r 's|" ([^=]+=")|",\L\1|g' | while IFS=, read -r size raw_labels; do | |
| size=${size/SIZE=} | |
| size=${size//\"} # remove quotes " | |
| labels=$(format_labels "$raw_labels" | tail -1) | |
| if [[ "$prometheus_format" == "true" ]]; then | |
| echo "devicemapper_size{$labels} $size" | |
| else | |
| echo "devicemapper,$labels size=$size" | |
| fi | |
| done |
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| # devicemapper.sh | grep -v -F /dev/loop | |
| devicemapper_size{name="/dev/mapper/kubuntu--vg-swap_1",kname="/dev/dm-2",pkname="/dev/dm-0",partlabel="-",state="running",type="lvm",fstype="swap",mountpoint="-"} 1027604480 | |
| devicemapper_size{name="/dev/mapper/kubuntu--vg-root",kname="/dev/dm-1",pkname="/dev/dm-0",partlabel="-",state="running",type="lvm",fstype="ext4",mountpoint="/"} 509771513856 | |
| devicemapper_size{name="/dev/mapper/sda3_crypt",kname="/dev/dm-0",pkname="/dev/sda3",partlabel="-",state="running",type="crypt",fstype="LVM2_member",mountpoint="-"} 510802264064 | |
| devicemapper_size{name="/dev/sda3",kname="/dev/sda3",pkname="/dev/sda",partlabel="-",state="-",type="part",fstype="crypto_LUKS",mountpoint="-"} 510804361216 | |
| devicemapper_size{name="/dev/sda",kname="/dev/sda",pkname="-",partlabel="-",state="running",type="disk",fstype="-",mountpoint="-"} 512110190592 | |
| devicemapper_size{name="/dev/sda1",kname="/dev/sda1",pkname="/dev/sda",partlabel="EFI System Partition",state="-",type="part",fstype="vfat",mountpoint="/boot/efi"} 536870912 | |
| devicemapper_size{name="/dev/sda2",kname="/dev/sda2",pkname="/dev/sda",partlabel="-",state="-",type="part",fstype="ext4",mountpoint="/boot"} 767557632 |
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