Clément Désiles
c127336321
Deploy an hourly systemd timer that writes pool and dataset capacity to node_exporter's textfile collector, since --collector.zfs exposes only ARC/I-O/state. Add a provisioned 'ZFS - Pools & Datasets' dashboard with per-pool totals, per-dataset used/quota and daily growth panels.
50 lines
2.1 KiB
Django/Jinja
50 lines
2.1 KiB
Django/Jinja
#!/bin/sh
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# Managed by Ansible - DO NOT EDIT MANUALLY
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#
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# Writes ZFS pool and dataset capacity metrics as Prometheus textfile metrics
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# into node_exporter's textfile collector directory. node_exporter's built-in
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# --collector.zfs exposes ARC, pool I/O and pool state only, not capacity.
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set -eu
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set -o pipefail
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metrics_dir="{{ zfs_metrics_dir }}"
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# node_exporter may not be deployed on this host.
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[ -d "$metrics_dir" ] || exit 0
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out="$metrics_dir/zfs.prom"
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tmp="$out.tmp"
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# Written atomically (tmp + mv) so the collector never reads a half-written file.
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{
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echo "# HELP zfs_pool_size_bytes Total size of the ZFS pool."
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echo "# TYPE zfs_pool_size_bytes gauge"
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echo "# HELP zfs_pool_alloc_bytes Allocated bytes in the ZFS pool."
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echo "# TYPE zfs_pool_alloc_bytes gauge"
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echo "# HELP zfs_pool_free_bytes Free bytes in the ZFS pool."
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echo "# TYPE zfs_pool_free_bytes gauge"
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echo "# HELP zfs_pool_capacity_percent Used capacity of the ZFS pool, in percent."
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echo "# TYPE zfs_pool_capacity_percent gauge"
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echo "# HELP zfs_dataset_used_bytes Used bytes of a ZFS dataset, including snapshots and children."
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echo "# TYPE zfs_dataset_used_bytes gauge"
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echo "# HELP zfs_dataset_refer_bytes Bytes referenced by a ZFS dataset itself."
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echo "# TYPE zfs_dataset_refer_bytes gauge"
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echo "# HELP zfs_dataset_quota_bytes Quota of a ZFS dataset in bytes (0 = no quota)."
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echo "# TYPE zfs_dataset_quota_bytes gauge"
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zpool list -Hp -o name,size,alloc,free,capacity | while read -r pool size alloc free capacity; do
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echo "zfs_pool_size_bytes{pool=\"$pool\"} $size"
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echo "zfs_pool_alloc_bytes{pool=\"$pool\"} $alloc"
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echo "zfs_pool_free_bytes{pool=\"$pool\"} $free"
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echo "zfs_pool_capacity_percent{pool=\"$pool\"} $capacity"
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done
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zfs list -Hp -o name,used,refer,quota -t filesystem | while read -r dataset used refer quota; do
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echo "zfs_dataset_used_bytes{dataset=\"$dataset\"} $used"
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echo "zfs_dataset_refer_bytes{dataset=\"$dataset\"} $refer"
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echo "zfs_dataset_quota_bytes{dataset=\"$dataset\"} $quota"
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done
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} > "$tmp"
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mv "$tmp" "$out"
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