diff options
| -rwxr-xr-x | extras/stop-all-gluster-processes.sh | 111 |
1 files changed, 110 insertions, 1 deletions
diff --git a/extras/stop-all-gluster-processes.sh b/extras/stop-all-gluster-processes.sh index 356a2a63059..f11c634007c 100755 --- a/extras/stop-all-gluster-processes.sh +++ b/extras/stop-all-gluster-processes.sh @@ -1,4 +1,37 @@ #!/usr/bin/env bash +# +# Kill all the processes/services except glusterd +# +# Usage: ./extras/stop-all-gluster-processes.sh [-g] [-h] +# options: +# -g Terminate in graceful mode +# -h Show this message, then exit +# +# eg: +# 1. ./extras/stop-all-gluster-processes.sh +# 2. ./extras/stop-all-gluster-processes.sh -g +# +# By default, this script executes in force mode, i.e. all of brick, gsyncd +# and other glustershd services/processes are killed without checking for +# ongoing tasks such as geo-rep, self-heal, rebalance and etc. which may lead +# to inconsistency after the node is brought back. +# +# On specifying '-g' option this script works in graceful mode, to maintain +# data consistency the script fails with a valid exit code incase if any of +# the gluster processes are busy in doing their jobs. +# +# The author of page [1] proposes user-defined exit codes to the range 64 - 113 +# Find the better explanation behind the choice in the link +# +# The exit code returned by stop-all-gluster-processes.sh: +# 0 No errors/Success +# 64 Rebalance is in progress +# 65 Self-Heal is in progress +# 66 Tier daemon running on this node +# 127 option not found +# +# [1] http://www.tldp.org/LDP/abs/html/exitcodes.html + # global errors=0 @@ -64,8 +97,84 @@ kill_georep_gsync() fi } +# check if all processes are ready to die +check_background_tasks() +{ + volumes=$(gluster vol list) + quit=0 + for volname in ${volumes}; + do + # tiering + if [[ $(gluster volume tier ${volname} status 2> /dev/null | + grep "localhost" | grep -c "in progress") -gt 0 ]] + then + quit=66 + break; + fi + + # rebalance + if [[ $(gluster volume rebalance ${volname} status 2> /dev/null | + grep -c "in progress") -gt 0 ]] + then + quit=64 + break; + fi + + # self heal + if [[ $(gluster volume heal ${volname} info | grep "Number of entries" | + awk '{ sum+=$4} END {print sum}') -gt 0 ]]; + then + quit=65 + break; + fi + + # geo-rep, snapshot and quota doesn't need grace checks, + # as they ensures the consistancy on force kills + done + + echo ${quit} +} + +usage() +{ + cat <<EOM +Usage: $0 [-g] [-h] + options: + -g Terminate in graceful mode + -h Show this message, then exit + +eg: + 1. $0 + 2. $0 -g +EOM +} + main() { + while getopts "gh" opt; do + case $opt in + g) + # graceful mode + quit=$(check_background_tasks) + if [[ ${quit} -ne 0 ]] + then + exit ${quit}; + fi + # else safe to kill + ;; + h) + usage + exit 0; + ;; + *) + usage + exit 127; + ;; + esac + done + # remove all the options that have been parsed by getopts + shift $((OPTIND-1)) + kill_mounts TERM kill_bricks_and_services TERM kill_georep_gsync TERM @@ -81,4 +190,4 @@ main() exit ${errors}; } -main +main "$@" |