loadnginx.sh

#! /bin/bash

# 基于 odp3.0的nginx，适用于odp3.0以下和odp3.0版本的nginx ,增加强制kill container里面的nginx的逻辑
# 20160129 升级chkconfig 增加创建log/webserver 目录部分
#

set -e
set -E
trap 'echo "Fail unexpectedly on ${BASH_SOURCE[0]}:$LINENO!" >&2' ERR

ODP_ROOT=$(readlink -f `dirname $BASH_SOURCE[0]`/..)
NGINX_HOME=${ODP_ROOT}/webserver
NGINX_BIN=$NGINX_HOME/sbin/nginx
NGINX_ARGS=' '
PID_FILE=${ODP_ROOT}/var/nginx.pid
NGINX_LOG="access_log error_log"

if [[ $USER == 'root' ]]; then
    NGINX_ARGS='user work;'
fi

is_odp3() {
    if [[ -e $ODP_ROOT/bin/odp_install ]];then
	    source $ODP_ROOT/bin/odp_install
        GCONV_PATH=$ODP_GCONV_PATH
    fi
}

not() {
    if $@; then
        return 1;
    else
        return 0;
    fi
}

wait_for() {
    local try=$1
    shift
    for ((;try>0;try--)); do
        if $@ ; then
            return 0
        fi
        echo -n .
        sleep 1
    done
    return 1
}

process_exists() {
    local pid=$1
    local bin=$2
    if [[ -d /proc/$pid ]]; then
        local exe=`readlink -f /proc/$pid/exe`
        if [[ $exe == $bin ]]; then
            return 0
        fi
        # 对于ODP目录被移动的情况
        if [[ ! -e $exe ]]; then
            return 0
        fi
    fi
    return 1
}

is_odp3 $NGINX_BIN
cd $NGINX_HOME/sbin

start() {
    echo -n "Starting nginx: "

    if [ ! -d "$ODP_ROOT/log/webserver" ]
    then
        mkdir -p "$ODP_ROOT/log/webserver"
    fi
    if [[ $USER == 'root' ]]; then
        chmod 755 "$ODP_ROOT"
        chmod 755 "$ODP_ROOT/log"
        touch "$ODP_ROOT/log/access_log"
        touch "$ODP_ROOT/log/error_log"
        chmod 777 $ODP_ROOT/log/access_log
        chmod 777 $ODP_ROOT/log/error_log
        chmod 777 $ODP_ROOT/log/webserver
        chmod 777 $ODP_ROOT/log/webserver/*
    fi

    if $NGINX_BIN -g "$NGINX_ARGS"</dev/null; then
        echo "ok"
    else
        echo "fail"
        exit 1
    fi
}

stop() {
    if [[ ! -f $PID_FILE ]]; then
        mstop_forcibly
        return
    fi
    PID=`head $PID_FILE`
    if ! process_exists $PID $NGINX_BIN; then
        rm $PID_FILE
        mstop_forcibly
        return
    fi
    echo -n "Stopping nginx: "
    # when nginx.conf error, nginx -s stop will failed
    kill $PID || true

    sleep 1
    mstop_forcibly

    if wait_for 10 "not process_exists $PID $NGINX_BIN"; then
        echo 'ok'
    else
        echo 'fail'
        exit 1
    fi
}

mstop_forcibly() {
    PID=$$
    ret=`grep -Eq ":/[0-9]+" "/proc/${PID}/cgroup" 2>/dev/null && echo 0 || echo 1`
    if [[ $ret -eq 0 && -f "/usr/orp/bin/ps" ]]
    then
        ## 判断是否是orp环境，且是container里面
        echo "kill nginx forcibly"
        for pid in `/usr/orp/bin/ps -eLf | grep "nginx" | grep -v grep  | awk '{print $2}' | sort | uniq`
        do
            ## 判断这些pid是否是nginx的进程
            if process_exists $pid $NGINX_BIN; then
                kill $pid 2>/dev/null || true
            fi
        done
    fi
}

case "$1" in
start)
    stop
    start
    ;;

stop)
    stop
    ;;

restart)
    stop
    start
    ;;

reload)
    if $NGINX_BIN -g "$NGINX_ARGS" -s reload; then
        echo "reload ok, please check it youself";
    else
        echo "reload fail"
        exit 1
    fi
    ;;

chkconfig)
    if [ ! -d "$ODP_ROOT/log/webserver" ]
    then
        mkdir -p "$ODP_ROOT/log/webserver"
    fi
    $NGINX_BIN -g "$NGINX_ARGS" -t
    ;;

*)
echo "Usage: $0 {start|stop|restart|chkconfig|reload}"
exit 1
esac