在OpenWrt Linux中的单独分区上，在启动/重新启动时运行Python程序

在OpenWrt Linux上，我在/etc/init.d文件夹中放置了一个启动脚本，并启用了它。脚本很好，如下所示：

#!/bin/sh /etc/rc.common

# Automatically place an "S91canpy" symlink in /etc/rc.d/ once we enable it
# This means it will start right after /etc/rc.d/90openvpn
START=91

# This is what will run when this service starts
start() { 
    # Run the process in the background (&), and direct errors to a log file
    sh /user/start_everything.sh >/var/log/init_canpy.log 2>&1 &
}

# This is what will run when the service stops
stop() {
    echo "no stop function set up yet"
}

# This is what will run when the service restarts
restart() {
    # Run the process in the background (&), and direct errors to a log file
    sh /user/start_everything.sh >/var/log/init_canpy.log 2>&1 &
}

#!/bin/sh

# Run the "find_config_data.py" Python program 
/data/venv/bin/python3.6 /user/canpy/find_config_data.py

line 4: /data/venv/bin/python3.6: not found

它调用的/user/start_everything.sh脚本如下所示：

#!/bin/sh /etc/rc.common

# Automatically place an "S91canpy" symlink in /etc/rc.d/ once we enable it
# This means it will start right after /etc/rc.d/90openvpn
START=91

# This is what will run when this service starts
start() { 
    # Run the process in the background (&), and direct errors to a log file
    sh /user/start_everything.sh >/var/log/init_canpy.log 2>&1 &
}

# This is what will run when the service stops
stop() {
    echo "no stop function set up yet"
}

# This is what will run when the service restarts
restart() {
    # Run the process in the background (&), and direct errors to a log file
    sh /user/start_everything.sh >/var/log/init_canpy.log 2>&1 &
}

#!/bin/sh

# Run the "find_config_data.py" Python program 
/data/venv/bin/python3.6 /user/canpy/find_config_data.py

line 4: /data/venv/bin/python3.6: not found

问题是/data位于一个单独的硬盘分区上，因此init.d很难找到它。我得到的错误如下：

#!/bin/sh /etc/rc.common

# Automatically place an "S91canpy" symlink in /etc/rc.d/ once we enable it
# This means it will start right after /etc/rc.d/90openvpn
START=91

# This is what will run when this service starts
start() { 
    # Run the process in the background (&), and direct errors to a log file
    sh /user/start_everything.sh >/var/log/init_canpy.log 2>&1 &
}

# This is what will run when the service stops
stop() {
    echo "no stop function set up yet"
}

# This is what will run when the service restarts
restart() {
    # Run the process in the background (&), and direct errors to a log file
    sh /user/start_everything.sh >/var/log/init_canpy.log 2>&1 &
}

#!/bin/sh

# Run the "find_config_data.py" Python program 
/data/venv/bin/python3.6 /user/canpy/find_config_data.py

line 4: /data/venv/bin/python3.6: not found

我的主分区只剩下20MB的空间，因此我必须将Python 3.6及其库安装到/data分区上，该分区有2.5GB的空间

如何让init.d在/data/venv/bin/python3.6中找到Python二进制文件？每次Linux启动/重新启动时，我都必须运行这个Python程序。谢谢

以下是我的分区设置：

root@FATBOX:/tmp/log# df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root               476.2M    456.0M     20.2M  96% /
devtmpfs                512.0K         0    512.0K   0% /dev
tmpfs                   247.7M    116.0K    247.6M   0% /tmp
tmpfs                   512.0K         0    512.0K   0% /dev
/dev/mmcblk0p3            2.7G     50.2M      2.5G   2% /data

---

我找到了另一种解决方案，可以完成任务，并确保我的应用程序继续运行（增加了好处）

我计划在cron中每分钟运行一个进程检查器脚本：

#!/bin/sh

# Checking if /user/canpy/app.py is running
ps | grep -v grep | grep /user/canpy/app.py
if [ $? -eq 0 ]; then
    echo "/user/canpy/app.py is running."
else
    # If it is not running, start it!
    echo "/user/canpy/app.py is not running. Starting it now"
    /data/venv/bin/python3.6 /user/canpy/app.py >/var/log/main_app_canpy.log 2>&1 &
fi

下面是位于/etc/crontab/root的crontab：

# Schedule check_running.sh to run every minute
* * * * * sh /user/check_running.sh >/var/log/check_running_canpy.log 2>&1 &

干杯， 肖恩