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#!/bin/bash
set -e
usage() {
echo "$0 [--force] [--verbose] ..."
echo "accepts environment variables:"
echo " - MYSQL_USER"
echo " - MYSQL_PASSWORD"
echo " - MYSQL_HOST"
echo " - MYSQL_PORT"
}
collect_vars() {
# set unset environment variables to defaults
[ -z ${MYSQL_USER+x} ] && MYSQL_USER="root"
[ -z ${MYSQL_NAME+x} ] && MYSQL_NAME="test"
[ -z ${MYSQL_HOST+x} ] && MYSQL_HOST="localhost"
[ -z ${MYSQL_PORT+x} ] && MYSQL_PORT="3306"
FLAGS=()
# handle flags
FORCE=false
VERBOSE=false
while [[ $# -gt 0 ]]; do
case "$1" in
--force) FORCE=true ;;
--verbose) VERBOSE=true ;;
--help) usage; exit ;;
*) FLAGS+=("$1")
esac
shift 1
done
FLAGS+=(-u "${MYSQL_USER}")
FLAGS+=(--host "${MYSQL_HOST}")
FLAGS+=(--port "${MYSQL_PORT}")
# Optionally print flags (before appending password)
[[ ${VERBOSE} = 'true' ]] && echo "- Using MySQL Flags: ${FLAGS[@]}"
# append password if supplied
[ -z ${MYSQL_PASSWORD+x} ] || FLAGS+=(-p"${MYSQL_PASSWORD}")
}
main() {
collect_vars "$@"
local CONN_LIMIT=1024
echo "Warning: about to set MySQL global connection limit to ${CONN_LIMIT}"
[[ ${FORCE} = true ]] || read -p "Are you sure? [Y/N]: " -n 1 -r
echo # Print newline following the above prompt
if [ -z ${REPLY+x} ] || [[ $REPLY =~ ^[Yy]$ ]]
then
mysql "${FLAGS[@]}" -e "SET GLOBAL max_connections = ${CONN_LIMIT};"
echo "Set Complete"
fi
}
main "$@"
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