50 lines
1.9 KiB
Django/Jinja
50 lines
1.9 KiB
Django/Jinja
#!/bin/bash
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# Pool capacity and the last scrub for the node exporter textfile collector.
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# A scrub in progress or cancelled keeps the previous end time: the pool has no newer completed scrub.
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set -euo pipefail
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dir={{ zfs_host_textfile_dir }}
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out=$dir/zfs_pool.prom
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tmp=$(mktemp "$dir/.zfs_pool.XXXXXX")
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trap 'rm -f "$tmp"' EXIT
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# Value of a metric line of the previous run, 0 if there is none.
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previous() {
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awk -v m="$1" -v p="$2" 'index($0, m "{pool=\"" p "\"}") == 1 {v = $2} END {print v + 0}' "$out" 2>/dev/null || echo 0
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}
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status=$(zpool status -p)
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{
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echo '# TYPE zfs_pool_size_bytes gauge'
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echo '# TYPE zfs_pool_allocated_bytes gauge'
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echo '# TYPE zfs_pool_fragmentation_ratio gauge'
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zpool list -Hp -o name,size,allocated,fragmentation | while IFS=$'\t' read -r pool size alloc frag; do
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echo "zfs_pool_size_bytes{pool=\"$pool\"} $size"
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echo "zfs_pool_allocated_bytes{pool=\"$pool\"} $alloc"
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if [[ $frag =~ ^[0-9]+$ ]]; then
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echo "zfs_pool_fragmentation_ratio{pool=\"$pool\"} $(awk -v f="$frag" 'BEGIN {print f / 100}')"
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fi
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done
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echo '# TYPE zfs_pool_scrub_end_timestamp_seconds gauge'
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echo '# TYPE zfs_pool_scrub_errors gauge'
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zpool list -Hp -o name | while read -r pool; do
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scan=$(awk -v p="$pool" '$1 == "pool:" {cur = $2} cur == p && $1 == "scan:" {sub(/^[ \t]*scan:[ \t]*/, ""); print; exit}' <<< "$status")
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end=0
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errors=0
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if [[ $scan =~ ^scrub\ repaired\ .*\ with\ ([0-9]+)\ errors\ on\ (.+)$ ]]; then
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errors=${BASH_REMATCH[1]}
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end=$(date -d "${BASH_REMATCH[2]}" +%s)
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elif [[ $scan =~ ^scrub\ (in\ progress|canceled) ]]; then
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end=$(previous zfs_pool_scrub_end_timestamp_seconds "$pool")
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errors=$(previous zfs_pool_scrub_errors "$pool")
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fi
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echo "zfs_pool_scrub_end_timestamp_seconds{pool=\"$pool\"} $end"
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echo "zfs_pool_scrub_errors{pool=\"$pool\"} $errors"
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done
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} > "$tmp"
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chmod 0644 "$tmp"
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mv "$tmp" "$out"
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trap - EXIT
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