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fd4774c35c
mysqld_safe.sh: Overhaul the logging design, to allow logging mysqld messages to syslog. Add --syslog and --skip-syslog arguments for mysqld_safe.
513 lines
14 KiB
Bash
513 lines
14 KiB
Bash
#!/bin/sh
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# Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
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# This file is public domain and comes with NO WARRANTY of any kind
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#
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# Script to start the MySQL daemon and restart it if it dies unexpectedly
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#
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# This should be executed in the MySQL base directory if you are using a
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# binary installation that is not installed in its compile-time default
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# location
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#
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# mysql.server works by first doing a cd to the base directory and from there
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# executing mysqld_safe
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KILL_MYSQLD=1;
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MYSQLD=
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niceness=0
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# Default on, unless --log-err is specified (and before options are parsed)
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syslog=2
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user=@MYSQLD_USER@
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pid_file=
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err_log=
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trap '' 1 2 3 15 # we shouldn't let anyone kill us
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umask 007
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defaults=
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case "$1" in
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--no-defaults|--defaults-file=*|--defaults-extra-file=*)
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defaults="$1"; shift
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;;
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esac
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usage () {
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cat <<EOF
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Usage: $0 [OPTIONS]
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--no-defaults Don't read the system defaults file
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--defaults-file=FILE Use the specified defaults file
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--defaults-extra-file=FILE Also use defaults from the specified file
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--ledir=DIRECTORY Look for mysqld in the specified directory
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--open-files-limit=LIMIT Limit the number of open files
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--core-file-size=LIMIT Limit core files to the specified size
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--timezone=TZ Set the system timezone
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--mysqld=FILE Use the specified file as mysqld
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--mysqld-version=VERSION Use "mysqld-VERSION" as mysqld
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--nice=NICE Set the scheduling priority of mysqld
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--skip-kill-mysqld Don't try to kill stray mysqld processes
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--syslog Log messages to syslog with 'logger'
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--skip-syslog Log messages to error log
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All other options are passed to the mysqld program.
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EOF
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exit 1
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}
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log_generic () {
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priority="$1"
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shift
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msg="`date +'%y%m%d %H:%M:%S'` mysqld_safe $*"
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echo "$msg"
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if [ $syslog -eq 0 ]
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then
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echo "$msg" >> "$err_log"
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else
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logger -i -t mysqld_safe -p "$priority" "$*"
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fi
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}
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log_error () {
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log_generic daemon.error "$@" >&2
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}
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log_notice () {
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log_generic daemon.notice "$@"
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}
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eval_log_error () {
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cmd="$1"
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if [ $syslog -eq 0 ]
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then
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cmd="$cmd >> "`shell_quote_string "$err_log"`" 2>&1"
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else
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# mysqld often (not always) prefixes messages on stdout with a
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# timestamp in the form of '%y%m%d %H:%M:%S '; this is redundant
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# when logging via syslog, so strip it
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cmd="$cmd 2>&1 | sed -e 's/^[0-9]\{6\} [0-9:]\{8\} *//' | logger -i -t mysqld -p daemon.error"
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fi
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#echo "Running mysqld: [$cmd]"
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eval "$cmd"
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}
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shell_quote_string() {
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# This sed command makes sure that any special chars are quoted,
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# so the arg gets passed exactly to the server.
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echo "$1" | sed -e 's,\([^a-zA-Z0-9/_.=-]\),\\\1,g'
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}
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parse_arguments() {
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# We only need to pass arguments through to the server if we don't
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# handle them here. So, we collect unrecognized options (passed on
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# the command line) into the args variable.
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pick_args=
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if test "$1" = PICK-ARGS-FROM-ARGV
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then
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pick_args=1
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shift
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fi
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for arg do
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val=`echo "$arg" | sed -e "s;--[^=]*=;;"`
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case "$arg" in
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# these get passed explicitly to mysqld
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--basedir=*) MY_BASEDIR_VERSION="$val" ;;
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--datadir=*) DATADIR="$val" ;;
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--pid-file=*) pid_file="$val" ;;
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--user=*) user="$val"; SET_USER=1 ;;
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# these might have been set in a [mysqld_safe] section of my.cnf
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# they are added to mysqld command line to override settings from my.cnf
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--log-error=*) err_log="$val" ;;
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--port=*) mysql_tcp_port="$val" ;;
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--socket=*) mysql_unix_port="$val" ;;
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# mysqld_safe-specific options - must be set in my.cnf ([mysqld_safe])!
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--core-file-size=*) core_file_size="$val" ;;
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--ledir=*) ledir="$val" ;;
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--mysqld=*) MYSQLD="$val" ;;
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--mysqld-version=*)
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if test -n "$val"
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then
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MYSQLD="mysqld-$val"
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else
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MYSQLD="mysqld"
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fi
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;;
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--nice=*) niceness="$val" ;;
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--open-files-limit=*) open_files="$val" ;;
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--skip-kill-mysqld*) KILL_MYSQLD=0 ;;
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--syslog) syslog=1 ;;
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--skip-syslog) syslog=0 ;;
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--timezone=*) TZ="$val"; export TZ; ;;
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--help) usage ;;
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*)
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if test -n "$pick_args"
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then
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append_arg_to_args "$arg"
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fi
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;;
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esac
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done
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}
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#
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# First, try to find BASEDIR and ledir (where mysqld is)
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#
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MY_PWD=`pwd`
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# Check for the directories we would expect from a binary release install
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if test -f ./share/mysql/english/errmsg.sys -a -x ./bin/mysqld
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then
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MY_BASEDIR_VERSION=$MY_PWD # Where bin, share and data are
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ledir=$MY_BASEDIR_VERSION/bin # Where mysqld is
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# Check for the directories we would expect from a source install
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elif test -f ./share/mysql/english/errmsg.sys -a -x ./libexec/mysqld
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then
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MY_BASEDIR_VERSION=$MY_PWD # Where libexec, share and var are
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ledir=$MY_BASEDIR_VERSION/libexec # Where mysqld is
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# Since we didn't find anything, used the compiled-in defaults
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else
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MY_BASEDIR_VERSION=@prefix@
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ledir=@libexecdir@
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fi
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#
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# Second, try to find the data directory
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#
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# Try where the binary installs put it
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if test -d $MY_BASEDIR_VERSION/data/mysql
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then
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DATADIR=$MY_BASEDIR_VERSION/data
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if test -z "$defaults" -a -r "$DATADIR/my.cnf"
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then
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defaults="--defaults-extra-file=$DATADIR/my.cnf"
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fi
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# Next try where the source installs put it
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elif test -d $MY_BASEDIR_VERSION/var/mysql
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then
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DATADIR=$MY_BASEDIR_VERSION/var
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# Or just give up and use our compiled-in default
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else
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DATADIR=@localstatedir@
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fi
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if test -z "$MYSQL_HOME"
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then
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if test -r "$MY_BASEDIR_VERSION/my.cnf" && test -r "$DATADIR/my.cnf"
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then
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log_error "WARNING: Found two instances of my.cnf -
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$MY_BASEDIR_VERSION/my.cnf and
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$DATADIR/my.cnf
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IGNORING $DATADIR/my.cnf"
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MYSQL_HOME=$MY_BASEDIR_VERSION
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elif test -r "$DATADIR/my.cnf"
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then
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log_error "WARNING: Found $DATADIR/my.cnf
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The data directory is a deprecated location for my.cnf, please move it to
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$MY_BASEDIR_VERSION/my.cnf"
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MYSQL_HOME=$DATADIR
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else
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MYSQL_HOME=$MY_BASEDIR_VERSION
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fi
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fi
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export MYSQL_HOME
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# Get first arguments from the my.cnf file, groups [mysqld] and [mysqld_safe]
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# and then merge with the command line arguments
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if test -x ./bin/my_print_defaults
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then
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print_defaults="./bin/my_print_defaults"
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elif test -x @bindir@/my_print_defaults
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then
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print_defaults="@bindir@/my_print_defaults"
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elif test -x @bindir@/mysql_print_defaults
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then
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print_defaults="@bindir@/mysql_print_defaults"
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else
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print_defaults="my_print_defaults"
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fi
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append_arg_to_args () {
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args="$args "`shell_quote_string "$1"`
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}
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args=
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SET_USER=2
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parse_arguments `$print_defaults $defaults --loose-verbose mysqld server`
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if test $SET_USER -eq 2
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then
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SET_USER=0
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fi
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parse_arguments `$print_defaults $defaults --loose-verbose mysqld_safe safe_mysqld`
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parse_arguments PICK-ARGS-FROM-ARGV "$@"
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# Determine what logging facility to use
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if [ -n "$err_log" -o $syslog -eq 0 ]
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then
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if [ -n "$err_log" ]
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then
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# mysqld adds ".err" if there is no extension on the --log-err
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# argument; must match that here, or mysqld_safe will write to a
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# different log file than mysqld
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# mysqld does not add ".err" to "--log-error=foo."; it considers a
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# trailing "." as an extension
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if expr "$err_log" : '.*\.[^/]*$' > /dev/null
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then
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:
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else
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err_log="$err_log".err
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fi
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case "$err_log" in
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/* ) ;;
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* ) err_log="$DATADIR/$err_log" ;;
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esac
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else
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err_log=$DATADIR/`@HOSTNAME@`.err
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fi
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append_arg_to_args "--log-error=$err_log"
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if [ $syslog -eq 1 ]
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then
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# User explicitly asked for syslog, so warn that it isn't used
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log_error "Can't log to error log and syslog at the same time. Remove all --log-error configuration options for --syslog to take effect. Logging to '$err_log'."
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fi
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# Don't use syslog since syslog and error log don't mix well
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syslog=0
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fi
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safe_mysql_unix_port=${mysql_unix_port:-${MYSQL_UNIX_PORT:-@MYSQL_UNIX_ADDR@}}
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# Make sure that directory for $safe_mysql_unix_port exists
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mysql_unix_port_dir=`dirname $safe_mysql_unix_port`
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if [ ! -d $mysql_unix_port_dir ]
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then
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mkdir $mysql_unix_port_dir
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chown $user $mysql_unix_port_dir
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chmod 755 $mysql_unix_port_dir
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fi
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# If the user doesn't specify a binary, we assume name "mysqld"
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if test -z "$MYSQLD"
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then
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MYSQLD=mysqld
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fi
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if test ! -x $ledir/$MYSQLD
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then
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log_error "The file $ledir/$MYSQLD
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does not exist or is not executable. Please cd to the mysql installation
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directory and restart this script from there as follows:
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./bin/mysqld_safe&
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See http://dev.mysql.com/doc/mysql/en/mysqld_safe.html for more information"
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exit 1
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fi
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if test -z "$pid_file"
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then
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pid_file=$DATADIR/`@HOSTNAME@`.pid
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else
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case "$pid_file" in
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/* ) ;;
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* ) pid_file="$DATADIR/$pid_file" ;;
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esac
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fi
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append_arg_to_args "--pid-file=$pid_file"
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if test -n "$mysql_unix_port"
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then
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append_arg_to_args "--socket=$mysql_unix_port"
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fi
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if test -n "$mysql_tcp_port"
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then
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append_arg_to_args "--port=$mysql_tcp_port"
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fi
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if test $niceness -eq 0
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then
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NOHUP_NICENESS="nohup"
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else
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NOHUP_NICENESS="nohup nice -$niceness"
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fi
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# Using nice with no args to get the niceness level is GNU-specific.
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# This check could be extended for other operating systems (e.g.,
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# BSD could use "nohup sh -c 'ps -o nice -p $$' | tail -1").
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# But, it also seems that GNU nohup is the only one which messes
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# with the priority, so this is okay.
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if nohup nice > /dev/null 2>&1
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then
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normal_niceness=`nice`
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nohup_niceness=`nohup nice 2>/dev/null`
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numeric_nice_values=1
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for val in $normal_niceness $nohup_niceness
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do
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case "$val" in
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-[0-9] | -[0-9][0-9] | -[0-9][0-9][0-9] | \
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[0-9] | [0-9][0-9] | [0-9][0-9][0-9] )
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;;
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* )
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numeric_nice_values=0 ;;
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esac
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done
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if test $numeric_nice_values -eq 1
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then
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nice_value_diff=`expr $nohup_niceness - $normal_niceness`
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if test $? -eq 0 && test $nice_value_diff -gt 0 && \
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nice --$nice_value_diff echo testing > /dev/null 2>&1
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then
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# nohup increases the priority (bad), and we are permitted
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# to lower the priority with respect to the value the user
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# might have been given
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niceness=`expr $niceness - $nice_value_diff`
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NOHUP_NICENESS="nice -$niceness nohup"
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fi
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fi
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else
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if nohup echo testing > /dev/null 2>&1
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then
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:
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else
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# nohup doesn't work on this system
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NOHUP_NICENESS=""
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fi
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fi
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USER_OPTION=""
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if test -w / -o "$USER" = "root"
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then
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if test "$user" != "root" -o $SET_USER = 1
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then
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USER_OPTION="--user=$user"
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fi
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# If we are root, change the err log to the right user.
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touch $err_log; chown $user $err_log
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if test -n "$open_files"
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then
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ulimit -n $open_files
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append_arg_to_args "--open-files-limit=$open_files"
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fi
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fi
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# Try to set the core file size (even if we aren't root) because many systems
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# don't specify a hard limit on core file size.
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if test -n "$core_file_size"
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then
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ulimit -c $core_file_size
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fi
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#
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# If there exists an old pid file, check if the daemon is already running
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# Note: The switches to 'ps' may depend on your operating system
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if test -f $pid_file
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then
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PID=`cat $pid_file`
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if @CHECK_PID@
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then
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if @FIND_PROC@
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then # The pid contains a mysqld process
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log_error "A mysqld process already exists"
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exit 1
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fi
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fi
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rm -f $pid_file
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if test -f $pid_file
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then
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log_error "Fatal error: Can't remove the pid file:
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$pid_file
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Please remove it manually and start $0 again;
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mysqld daemon not started"
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exit 1
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fi
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fi
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#
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# Uncomment the following lines if you want all tables to be automatically
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# checked and repaired during startup. You should add sensible key_buffer
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# and sort_buffer values to my.cnf to improve check performance or require
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# less disk space.
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# Alternatively, you can start mysqld with the "myisam-recover" option. See
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# the manual for details.
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#
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# echo "Checking tables in $DATADIR"
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# $MY_BASEDIR_VERSION/bin/myisamchk --silent --force --fast --medium-check $DATADIR/*/*.MYI
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# $MY_BASEDIR_VERSION/bin/isamchk --silent --force $DATADIR/*/*.ISM
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# Does this work on all systems?
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#if type ulimit | grep "shell builtin" > /dev/null
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#then
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# ulimit -n 256 > /dev/null 2>&1 # Fix for BSD and FreeBSD systems
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#fi
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cmd="$NOHUP_NICENESS"
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for i in "$ledir/$MYSQLD" "$defaults" "--basedir=$MY_BASEDIR_VERSION" \
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"--datadir=$DATADIR" "$USER_OPTION"
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do
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cmd="$cmd "`shell_quote_string "$i"`
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done
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cmd="$cmd $args"
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# Avoid 'nohup: ignoring input' warning
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test -n "$NOHUP_NICENESS" && cmd="$cmd < /dev/null"
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log_notice "Starting $MYSQLD daemon with databases from $DATADIR"
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while true
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do
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rm -f $safe_mysql_unix_port $pid_file # Some extra safety
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eval_log_error "$cmd"
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if test ! -f $pid_file # This is removed if normal shutdown
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then
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break
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fi
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if @TARGET_LINUX@ && test $KILL_MYSQLD -eq 1
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then
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# Test if one process was hanging.
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# This is only a fix for Linux (running as base 3 mysqld processes)
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# but should work for the rest of the servers.
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# The only thing is ps x => redhat 5 gives warnings when using ps -x.
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# kill -9 is used or the process won't react on the kill.
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numofproces=`ps xaww | grep -v "grep" | grep "$ledir/$MYSQLD\>" | grep -c "pid-file=$pid_file"`
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log_notice "Number of processes running now: $numofproces"
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I=1
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while test "$I" -le "$numofproces"
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do
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PROC=`ps xaww | grep "$ledir/$MYSQLD\>" | grep -v "grep" | grep "pid-file=$pid_file" | sed -n '$p'`
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for T in $PROC
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do
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break
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done
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# echo "TEST $I - $T **"
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if kill -9 $T
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then
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log_error "$MYSQLD process hanging, pid $T - killed"
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else
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break
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fi
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I=`expr $I + 1`
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done
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fi
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log_notice "mysqld restarted"
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done
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|
|
|
log_notice "mysqld from pid file $pid_file ended"
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|
|