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#!/bin/bash
# Copyright (c) 2019-2020 Red Hat, Inc. <http://www.redhat.com>
# This file is part of GlusterFS.
#
# This file is licensed to you under your choice of the GNU Lesser
# General Public License, version 3 or any later version (LGPLv3 or
# later), or the GNU General Public License, version 2 (GPLv2), in all
# cases as published by the Free Software Foundation.
# This script provides a list of all the files which can be healed or not healed.
# It also generates two files, potential_heal and can_not_heal, which contains the information
# of all theose files. These files could be used by correct_pending_heals.sh to correct
# the fragmnets so that files could be healed by shd.
CAN_NOT_HEAL="can_not_heal"
CAN_HEAL="potential_heal"
LINE_SEP="==================================================="
LOG_DIR="/var/log/glusterfs"
LOG_FILE="$LOG_DIR/ec-heal-script.log"
function heal_log()
{
echo "$1" >> "$LOG_FILE"
}
function _init ()
{
if [ $# -ne 1 ]; then
echo "usage: $0 <gluster volume name>";
echo "This script provides a list of all the files which can be healed or not healed.
It also generates two files, potential_heal and can_not_heal, which contains the information
of all theose files. These files could be used by correct_pending_heals.sh to correct
the fragmnets so that files could be healed by shd."
exit 2;
fi
volume=$1;
}
function get_pending_entries ()
{
local volume_name=$1
gluster volume heal "$volume_name" info | grep -v ":/" | grep -v "Number of entries" | grep -v "Status:" | sort -u | sed '/^$/d'
}
function get_entry_path_on_brick()
{
local path="$1"
local gfid_string=""
if [[ "${path:0:1}" == "/" ]];
then
echo "$path"
else
gfid_string="$(echo "$path" | cut -f2 -d':' | cut -f1 -d '>')"
echo "/.glusterfs/${gfid_string:0:2}/${gfid_string:2:2}/$gfid_string"
fi
}
function run_command_on_server()
{
local subvolume="$1"
local host="$2"
local cmd="$3"
local output
output=$(ssh -n "${host}" "${cmd}")
if [ -n "$output" ]
then
echo "$subvolume:$output"
fi
}
function get_entry_path_all_bricks ()
{
local entry="$1"
local bricks="$2"
local cmd=""
for brick in $bricks
do
echo "${brick}#$(get_entry_path_on_brick "$entry")"
done | tr '\n' ','
}
function get_stat_for_entry_from_all_bricks ()
{
local entry="$1"
local bricks="$2"
local subvolume=0
local host=""
local bpath=""
local cmd=""
for brick in $bricks
do
if [[ "$((subvolume % 6))" == "0" ]]
then
subvolume=$((subvolume+1))
fi
host=$(echo "$brick" | cut -f1 -d':')
bpath=$(echo "$brick" | cut -f2 -d':')
cmd="stat --format=%F:%B:%s $bpath$(get_entry_path_on_brick "$entry") 2>/dev/null"
run_command_on_server "$subvolume" "${host}" "${cmd}" &
done | sort | uniq -c | sort -rnk1
}
function get_bricks_from_volume()
{
local v=$1
gluster volume info "$v" | grep -E "^Brick[0-9][0-9]*:" | cut -f2- -d':'
}
function print_entry_gfid()
{
local host="$1"
local dirpath="$2"
local entry="$3"
local gfid
gfid="$(ssh -n "${host}" "getfattr -d -m. -e hex $dirpath/$entry 2>/dev/null | grep trusted.gfid=|cut -f2 -d'='")"
echo "$entry" - "$gfid"
}
function print_brick_directory_info()
{
local h="$1"
local dirpath="$2"
while read -r e
do
print_entry_gfid "${h}" "${dirpath}" "${e}"
done < <(ssh -n "${h}" "ls $dirpath 2>/dev/null")
}
function print_directory_info()
{
local entry="$1"
local bricks="$2"
local h
local b
local gfid
for brick in $bricks;
do
h="$(echo "$brick" | cut -f1 -d':')"
b="$(echo "$brick" | cut -f2 -d':')"
dirpath="$b$(get_entry_path_on_brick "$entry")"
print_brick_directory_info "${h}" "${dirpath}" &
done | sort | uniq -c
}
function print_entries_needing_heal()
{
local quorum=0
local entry="$1"
local bricks="$2"
while read -r line
do
quorum=$(echo "$line" | awk '{print $1}')
if [[ "$quorum" -lt 4 ]]
then
echo "$line - Not in Quorum"
else
echo "$line - In Quorum"
fi
done < <(print_directory_info "$entry" "$bricks")
}
function find_file_paths ()
{
local bpath=$1
local file_entry=""
local file_host=""
local cmd=""
local brick_root=""
local gfid=""
local actual_path=""
local gfid_path=""
file_host=$(echo "$bpath" | cut -d ":" -f 1)
file_entry=$(echo "$bpath" | cut -d ":" -f 2)
brick_root=$(echo "$file_entry" | cut -d "#" -f 1)
gfid=$(echo "${file_entry}" | grep ".glusterfs")
if [[ -n "$gfid" ]]
then
gfid_path=$(echo "$file_entry" | cut -d "#" -f 2)
file_entry=${file_entry//#}
cmd="find -L '$brick_root' -samefile '$file_entry' 2>/dev/null | grep -v '.glusterfs' "
actual_path=$(ssh -n "${file_host}" "${cmd}")
#removing absolute path so that user can refer this from mount point
actual_path=${actual_path#"$brick_root"}
else
actual_path=$(echo "$file_entry" | cut -d "#" -f 2)
file_entry=${file_entry//#}
cmd="find -L '$brick_root' -samefile '$file_entry' 2>/dev/null | grep '.glusterfs' "
gfid_path=$(ssh -n "${file_host}" "${cmd}")
gfid_path=${gfid_path#"$brick_root"}
fi
echo "${gfid_path}|${actual_path}"
}
function log_can_not_heal ()
{
local gfid_actual_paths=$1
local file_paths=$2
file_paths=${file_paths//#}
echo "${LINE_SEP}" >> "$CAN_NOT_HEAL"
echo "Can Not Heal : $(echo "$gfid_actual_paths" | cut -d '|' -f 2)" >> "$CAN_NOT_HEAL"
for bpath in ${file_paths//,/ }
do
echo "${bpath}" >> "$CAN_NOT_HEAL"
done
}
function main ()
{
local bricks=""
local quorum=0
local stat_info=""
local file_type=""
local gfid_actual_paths=""
local bpath=""
local file_paths=""
local good=0
local bad=0
bricks=$(get_bricks_from_volume "$volume")
rm -f "$CAN_HEAL"
rm -f "$CAN_NOT_HEAL"
mkdir "$LOG_DIR" -p
heal_log "Started $(basename "$BASH_SOURCE") on $(date) "
while read -r heal_entry
do
heal_log "------------------------------------------------------------------"
heal_log "$heal_entry"
gfid_actual_paths=""
file_paths="$(get_entry_path_all_bricks "$heal_entry" "$bricks")"
stat_info="$(get_stat_for_entry_from_all_bricks "$heal_entry" "$bricks")"
heal_log "$stat_info"
quorum=$(echo "$stat_info" | head -1 | awk '{print $1}')
good_stat=$(echo "$stat_info" | head -1 | awk '{print $3}')
file_type="$(echo "$stat_info" | head -1 | cut -f2 -d':')"
if [[ "$file_type" == "directory" ]]
then
print_entries_needing_heal "$heal_entry" "$bricks"
else
if [[ "$quorum" -ge 4 ]]
then
good=$((good + 1))
heal_log "Verdict: Healable"
echo "${good_stat}|$file_paths" >> "$CAN_HEAL"
else
bad=$((bad + 1))
heal_log "Verdict: Not Healable"
for bpath in ${file_paths//,/ }
do
if [[ -z "$gfid_actual_paths" ]]
then
gfid_actual_paths=$(find_file_paths "$bpath")
else
break
fi
done
log_can_not_heal "$gfid_actual_paths" "${file_paths}"
fi
fi
done < <(get_pending_entries "$volume")
heal_log "========================================="
heal_log "Total number of potential heal : ${good}"
heal_log "Total number of can not heal : ${bad}"
heal_log "========================================="
}
_init "$@" && main "$@"
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