From 7eb2776728a287f65d6bf17d576558793f951671 Mon Sep 17 00:00:00 2001
From: Thomas Kriechbaumer <thomas@kriechbaumer.name>
Date: Mon, 27 Dec 2021 20:21:17 +0100
Subject: [PATCH] remove md_info scripts as functionality is now included in
 node_exporter

closes #24
closes #25
closes #48
closes #92
For remaining problems, please open a new issue at https://github.com/prometheus/node_exporter

Signed-off-by: Thomas Kriechbaumer <thomas@kriechbaumer.name>
---
 md_info.sh        | 56 ------------------------------
 md_info_detail.sh | 87 -----------------------------------------------
 2 files changed, 143 deletions(-)
 delete mode 100755 md_info.sh
 delete mode 100755 md_info_detail.sh

diff --git a/md_info.sh b/md_info.sh
deleted file mode 100755
index 13dc6d8..0000000
--- a/md_info.sh
+++ /dev/null
@@ -1,56 +0,0 @@
-#!/usr/bin/env bash
-set -eu
-
-for MD_DEVICE in /dev/md/*; do
-  # Subshell to avoid eval'd variables from leaking between iterations
-  (
-    # Resolve symlink to discover device, e.g. /dev/md127
-    MD_DEVICE_NUM=$(readlink -f "${MD_DEVICE}")
-
-    # Remove /dev/ prefix
-    MD_DEVICE_NUM=${MD_DEVICE_NUM#/dev/}
-    MD_DEVICE=${MD_DEVICE#/dev/md/}
-
-    # Query sysfs for info about md device
-    SYSFS_BASE="/sys/devices/virtual/block/${MD_DEVICE_NUM}/md"
-    MD_LAYOUT=$(cat "${SYSFS_BASE}/layout")
-    MD_LEVEL=$(cat "${SYSFS_BASE}/level")
-    MD_METADATA_VERSION=$(cat "${SYSFS_BASE}/metadata_version")
-    MD_NUM_RAID_DISKS=$(cat "${SYSFS_BASE}/raid_disks")
-
-    # Remove 'raid' prefix from RAID level
-    MD_LEVEL=${MD_LEVEL#raid}
-
-    # Output disk metrics
-    for RAID_DISK in "${SYSFS_BASE}"/rd[0-9]*; do
-      DISK=$(readlink -f "${RAID_DISK}/block")
-      DISK_DEVICE=$(basename "${DISK}")
-      RAID_DISK_DEVICE=$(basename "${RAID_DISK}")
-      RAID_DISK_INDEX=${RAID_DISK_DEVICE#rd}
-      RAID_DISK_STATE=$(cat "${RAID_DISK}/state")
-
-      DISK_SET=""
-      # Determine disk set using logic from mdadm: https://github.com/neilbrown/mdadm/commit/2c096ebe4b
-      if [[ ${RAID_DISK_STATE} == "in_sync" && ${MD_LEVEL} == 10 && $((MD_LAYOUT & ~0x1ffff)) ]]; then
-        NEAR_COPIES=$((MD_LAYOUT & 0xff))
-        FAR_COPIES=$(((MD_LAYOUT >> 8) & 0xff))
-        COPIES=$((NEAR_COPIES * FAR_COPIES))
-
-        if [[ $((MD_NUM_RAID_DISKS % COPIES == 0)) && $((COPIES <= 26)) ]]; then
-          DISK_SET=$((RAID_DISK_INDEX % COPIES))
-        fi
-      fi
-
-      echo -n "node_md_disk_info{disk_device=\"${DISK_DEVICE}\", md_device=\"${MD_DEVICE_NUM}\""
-      if [[ -n ${DISK_SET} ]]; then
-        SET_LETTERS=({A..Z})
-        echo -n ", md_set=\"${SET_LETTERS[${DISK_SET}]}\""
-      fi
-      echo "} 1"
-    done
-
-    # Output RAID array metrics
-    # NOTE: Metadata version is a label rather than a separate metric because the version can be a string
-    echo "node_md_info{md_device=\"${MD_DEVICE_NUM}\", md_name=\"${MD_DEVICE}\", raid_level=\"${MD_LEVEL}\", md_metadata_version=\"${MD_METADATA_VERSION}\"} 1"
-  )
-done
diff --git a/md_info_detail.sh b/md_info_detail.sh
deleted file mode 100755
index ea0aa43..0000000
--- a/md_info_detail.sh
+++ /dev/null
@@ -1,87 +0,0 @@
-#!/usr/bin/env bash
-# Note: This script uses "mdadm --detail" to get some of the metrics, so it must be run as root.
-#       It is designed to be run periodically in a cronjob, and output to /var/lib/node_exporter/textfile_collector/md_info_detail.prom
-#       $ cat /etc/cron.d/prometheus_md_info_detail
-#       * * * * * bash /var/lib/node_exporter/md_info_detail.sh > /var/lib/node_exporter/md_info_detail.prom.$$ && mv /var/lib/node_exporter/md_info_detail.prom.$$ /var/lib/node_exporter/md_info_detail.prom
-
-set -eu
-
-for MD_DEVICE in /dev/md/*; do
-  # Subshell to avoid eval'd variables from leaking between iterations
-  (
-    # Resolve symlink to discover device, e.g. /dev/md127
-    MD_DEVICE_NUM=$(readlink -f "${MD_DEVICE}")
-
-    # Remove /dev/ prefix
-    MD_DEVICE_NUM=${MD_DEVICE_NUM#/dev/}
-    MD_DEVICE=${MD_DEVICE#/dev/md/}
-
-    # Query sysfs for info about md device
-    SYSFS_BASE="/sys/devices/virtual/block/${MD_DEVICE_NUM}/md"
-    MD_LAYOUT=$(cat "${SYSFS_BASE}/layout")
-    MD_LEVEL=$(cat "${SYSFS_BASE}/level")
-    MD_METADATA_VERSION=$(cat "${SYSFS_BASE}/metadata_version")
-    MD_NUM_RAID_DISKS=$(cat "${SYSFS_BASE}/raid_disks")
-
-    # Remove 'raid' prefix from RAID level
-    MD_LEVEL=${MD_LEVEL#raid}
-
-    # Output disk metrics
-    for RAID_DISK in "${SYSFS_BASE}"/rd[0-9]*; do
-      DISK=$(readlink -f "${RAID_DISK}/block")
-      DISK_DEVICE=$(basename "${DISK}")
-      RAID_DISK_DEVICE=$(basename "${RAID_DISK}")
-      RAID_DISK_INDEX=${RAID_DISK_DEVICE#rd}
-      RAID_DISK_STATE=$(cat "${RAID_DISK}/state")
-
-      DISK_SET=""
-      # Determine disk set using logic from mdadm: https://github.com/neilbrown/mdadm/commit/2c096ebe4b
-      if [[ ${RAID_DISK_STATE} == "in_sync" && ${MD_LEVEL} == 10 && $((MD_LAYOUT & ~0x1ffff)) ]]; then
-        NEAR_COPIES=$((MD_LAYOUT & 0xff))
-        FAR_COPIES=$(((MD_LAYOUT >> 8) & 0xff))
-        COPIES=$((NEAR_COPIES * FAR_COPIES))
-
-        if [[ $((MD_NUM_RAID_DISKS % COPIES == 0)) && $((COPIES <= 26)) ]]; then
-          DISK_SET=$((RAID_DISK_INDEX % COPIES))
-        fi
-      fi
-
-      echo -n "node_md_disk_info{disk_device=\"${DISK_DEVICE}\", md_device=\"${MD_DEVICE_NUM}\""
-      if [[ -n ${DISK_SET} ]]; then
-        SET_LETTERS=({A..Z})
-        echo -n ", md_set=\"${SET_LETTERS[${DISK_SET}]}\""
-      fi
-      echo "} 1"
-    done
-
-    # Get output from mdadm --detail (Note: root/sudo required)
-    MDADM_DETAIL_OUTPUT=$(mdadm --detail /dev/"${MD_DEVICE_NUM}")
-
-    # Output RAID "Devices", "Size" and "Event" metrics, from the output of "mdadm --detail"
-    while IFS= read -r line ; do
-      # Filter out these keys that have numeric values that increment up
-      if echo "$line" | grep -E -q "Devices :|Array Size :| Used Dev Size :|Events :"; then
-        MDADM_DETAIL_KEY=$(echo "$line" | cut -d ":" -f 1 | tr -cd '[a-zA-Z0-9]._-')
-        MDADM_DETAIL_VALUE=$(echo "$line" | cut -d ":" -f 2 | cut -d " " -f 2 | sed 's:^ ::')
-        echo "node_md_info_${MDADM_DETAIL_KEY}{md_device=\"${MD_DEVICE_NUM}\", md_name=\"${MD_DEVICE}\", raid_level=\"${MD_LEVEL}\", md_num_raid_disks=\"${MD_NUM_RAID_DISKS}\", md_metadata_version=\"${MD_METADATA_VERSION}\"} ${MDADM_DETAIL_VALUE}"
-      fi
-    done  <<< "$MDADM_DETAIL_OUTPUT"
-
-    # Output RAID detail metrics info from the output of "mdadm --detail"
-    # NOTE: Sending this info as labels rather than separate metrics, because some of them can be strings.
-    echo -n "node_md_info{md_device=\"${MD_DEVICE_NUM}\", md_name=\"${MD_DEVICE}\", raid_level=\"${MD_LEVEL}\", md_num_raid_disks=\"${MD_NUM_RAID_DISKS}\", md_metadata_version=\"${MD_METADATA_VERSION}\""
-    while IFS= read -r line ; do
-      # Filter for lines with a ":", to use for Key/Value pairs in labels
-      if echo "$line" | grep -E -q ":" ; then
-        # Exclude lines with these keys, as they're values are numbers that increment up and captured in individual metrics above
-        if echo "$line" | grep -E -qv "Array Size|Used Dev Size|Events|Update Time" ; then
-          echo -n ", "
-          MDADM_DETAIL_KEY=$(echo "$line" | cut -d ":" -f 1 | tr -cd '[a-zA-Z0-9]._-')
-          MDADM_DETAIL_VALUE=$(echo "$line" | cut -d ":" -f 2- | sed 's:^ ::')
-          echo -n "${MDADM_DETAIL_KEY}=\"${MDADM_DETAIL_VALUE}\""
-        fi
-      fi
-    done  <<< "$MDADM_DETAIL_OUTPUT"
-    echo "} 1"
-  )
-done