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showkey
Asked: 2018-04-14 23:08:23 +0800 CST

无法解析主机：content.dropboxapi.com 何时在关机时上传文件

  • 772

我想在我的电脑关闭时将文件上传到我的保管箱。

sudo vim  /etc/systemd/system/upload.service
[Unit]
Description=upload files into dropbox
Before=network.target shutdown.target  reboot.target
Requires=network-online.target

[Service]
ExecStop=/bin/true
ExecStart=/bin/bash  /home/upload.sh 
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target

和upload.sh 脚本。

cd  /home
curl -X POST https://content.dropboxapi.com/2/files/upload \
            --header "Authorization: Bearer xxxx" \
            --header "Dropbox-API-Arg:  {\"path\":\"/test.txt\",\"mode\":{\".tag\":\"overwrite\"}}" \
            --header "Content-Type: application/octet-stream" \
            --data-binary @"test.txt"

bash upload.sh可以成功执行，并将test.txt文件上传到我的保管箱中。 

sudo systemctl enable upload service

重新启动我的电脑。

sudo journalctl -u upload 

Apr 13 23:58:52 localhost systemd[1]: Started upload files into dropbox.
Apr 13 23:58:52 localhost systemd[1]: Starting upload files into dropbox...
Apr 13 23:58:52 localhost bash[117]: % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
Apr 13 23:58:52 localhost bash[117]: Dload  Upload   Total   Spent    Left  Speed
Apr 13 23:58:52 localhost bash[117]: 0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0curl: (6) Could not resolve host: content.dropboxapi.com; Un
Apr 13 23:58:52 localhost systemd[1]: upload.service: main process exited, code=exited, status=6/NOTCONFIGURED
Apr 13 23:58:52 localhost systemd[1]: Unit upload.service entered failed state.
Apr 13 23:58:52 localhost systemd[1]: upload.service failed.

某些 DNS 错误Could not resolve host: content.dropboxapi.com导致 upload.service 失败。

我Requires=network-online.target在upload.service中添加了，如何让DNS解析器在我的电脑关机时解析主机？

shutdown systemd dropbox

3 个回答

  1. Best Answer

    方法一：/etc/systemd/system/upload.service
    1.1 /etc/systemd/system/upload.service

    sudo vim  /etc/systemd/system/upload.service
[Unit]
Description=upload files into dropbox
Before=shutdown.target  reboot.target
Requires=network-online.target
After=network.target    

[Service]
ExecStop=/bin/true
ExecStart=/bin/bash  /home/upload.sh 
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target

    1.2 vim /home/upload.sh

    cd  /home
curl -X POST https://content.dropboxapi.com/2/files/upload \
            --header "Authorization: Bearer xxxx" \
            --header "Dropbox-API-Arg:  {\"path\":\"/test.txt\",\"mode\":{\".tag\":\"overwrite\"}}" \
            --header "Content-Type: application/octet-stream" \
            --data-binary @"test.txt"

    1.3 sudo systemctl enable upload.service

    方法2：/lib/systemd/system-shutdown/upload.service
    2.1 /lib/systemd/system-shutdown/upload.service

    sudo vim  /lib/systemd/system-shutdown/upload.service
[Unit]
Description=upload files into dropbox
Before=shutdown.target  reboot.target
Requires=network-online.target
After=network.target    

[Service]
ExecStop=/bin/true
ExecStart=/bin/bash  /home/upload.sh 
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target

    2.2 vim /home/upload.sh

    cd  /home
curl -X POST https://content.dropboxapi.com/2/files/upload \
            --header "Authorization: Bearer xxxx" \
            --header "Dropbox-API-Arg:  {\"path\":\"/test.txt\",\"mode\":{\".tag\":\"overwrite\"}}" \
            --header "Content-Type: application/octet-stream" \
            --data-binary @"test.txt"

    2.3 sudo systemctl enable /lib/systemd/system-shutdown/upload.service

    • 1

  2. Execstop 和 Execstart 颠倒

    根据这个 Unix & Linux 的回答：How to run a script with systemd right before shutdown，你的 Execstop 和 Execstart 是相反的。

    这些行：

    ExecStop=/bin/true
ExecStart=/bin/bash  /home/upload.sh

    应该读：

    ExecStart=/bin/true
ExecStop=/bin/bash  /home/upload.sh

    答案继续提到重新启动服务。systemctl daemon-reload因此，在创建文件后，请确保systemctl enable yourservice --now

    替代方法不起作用

    ,before=等requires=有时会令人困惑。您可以将脚本放在/usr/lib/systemd/system-shutdown/目录中。它将在关闭后立即运行。请参阅：https ://superuser.com/questions/1016827/how-do-i-run-a-script-before-everything-else-on-shutdown-with-systemd

    某些系统上的/usr前缀可能不同，即仅以 . 开头的目录名称/lib。

    • 0

  3. 在系统宕机时运行程序或脚本的最佳方法是使用ExecStop=单元的 运行此类程序。ExecStart=可以是一个虚拟脚本（例如） ，/bin/true或者在最近的 systemd 版本中，它甚至可以被省略。

    关于依赖关系，您希望将您的单元放在您需要的服务之后，例如，network-online.target如果systemd-resolved.service您将其用于 DNS 解析。原因是系统在关机时以与启动相反的顺序停止。因此，通过在依赖项之后订购您的服务，这意味着您的ExecStop=脚本将在依赖项停止之前运行。

    像这样的东西应该工作：

    [Unit]
Description=upload files into dropbox
After=network.target systemd-resolved.service
Requires=network-online.target

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/true
ExecStop=/bin/bash /home/upload.sh 
StandardOutput=journal
StandardError=journal

[Install]
WantedBy=multi-user.target

    像往常一样启用该单元（--now参数也启动它）：

    $ sudo systemctl enable --now upload.service

    它会在停止时执行上传，您可以使用以下方法进行测试：

    $ sudo systemctl stop upload.service

    最近在 systemd-devel 邮件列表中对此进行了讨论。

    • 0

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