# !/bin/bash # # lustre_route_config # This script configures lnet with the routes in the passed in file. # The routes should be in the following format: # : { gateway: @ [hop: ] [priority: ] } # # Examples: # tcp1: { gateway: 10.1.1.2@tcp0, priority: 3 } # tcp4: { gateway: 10.3.3.4@tcp } # tcp6: { gateway: 10.3.3.6@tcp, hop: 2, priority: 5 } # tcp7: { gateway: 10.3.3.[6-12]@tcp, priority: 20, hop: 8 } # # The purpose of this script is to circumvent the limitation on the number of # routes which could be configured through the lustre.conf module parameters. # ########################################################################### progname=$(basename $0) # print usage usage() { cat <<- USAGE Setup or cleanup LNET routes from specified config file" usage: $progname [--setup|--cleanup|--dry-run|--verbose] --setup: configure routes listed in config_file --cleanup: unconfigure routes listed in config_file --dry-run: echo commands to be run, but do not execute them --verbose: echo commands before they are executed USAGE } # Set default paramters CMD=add_route VERBOSE=false EXEC=true # sanity check [ -z "$1" ] && usage && exit 1 # check parameters while [ ! -f "$1" ]; do case "$1" in -c|--cleanup) CMD=del_route; shift ;; -h|--help) usage; exit 0 ;; -n|--dry-run) EXEC=false; VERBOSE=true; shift ;; -s|--setup) CMD=add_route; shift ;; -v|--verbose) VERBOSE=true; shift ;; *) usage; exit 1 ;; esac done # Usage: do_lctl # execut the command and/or print if verbose is set do_lctl() { local RC=0 $VERBOSE && echo "lctl $@" if $EXEC; then lctl "$@" RC=$? fi return $RC } # Usage: find_arg_value find_arg_value() { local i=0 local value="" local arg="$2" declare -a array=("${!1}") for ((i = 0; i < ${#array[@]}; i++)); do if [ "${array[$i]}" == "$arg" ]; then value="${array[$((i + 1))]}" break fi done echo -n $value } while read line; do # Parse line using ':' and ',' as delimiters and ignoring all # white space, tabs and linefeed IFS="$IFS:," params=($line) # get the mandatory parameters: network and gateway # If either is not present skip that line network=${params[0]} OBR=${params[1]} GATE=${params[2]} gateway=${params[3]} if [ -z $network ] || [ -z $gateway ] || [ $GATE != "gateway" ]; then continue fi case "$CMD" in add_route) baselctl="--net $network add_route $gateway" # walk through the optional params until you hit # the closing brace. Build an associative db: # option=value i=4 while [ $i -lt ${#params[@]} ]; do option=${params[$i]} if [ "$option" == "}" ]; then break fi outoptions[$i]=$option ((i++)) value=${params[$i]} outoptions[$i]=$value ((i++)) done # find the hop and priority # This can be expanded later on if we add extra # parameters # NOTE: the order between hop and priority is not # enforced. It's also possible to add hop without # prio or prio without hop priority=$(find_arg_value outoptions[@] "priority") hop=$(find_arg_value outoptions[@] "hop") if [ -n "$priority" ] && [ -z "$hop" ]; then baselctl+=" 1 $priority" else baselctl+=" $hop $priority" fi ;; del_route) baselctl="del_route $gateway" esac do_lctl $baselctl done < "$1"