无法向新Dokku容器推送代码：AppArmor配置文件应用失败

在服务器上安装Dokku并创建应用myNodeApp：

$ dokku apps:create myNodeApp

本地仓库添加Dokku远程后，执行git add .并推送代码时出现构建失败，错误信息如下：

$ git push dokku main
Enumerating objects: 1119, done.
Counting objects: 100% (1119/1119), done.
Delta compression using up to 20 threads
Compressing objects: 100% (760/760), done.
Writing objects: 100% (1119/1119), 92.80 MiB | 11.25 MiB/s, done.
Total 1119 (delta 577), reused 727 (delta 310), pack-reused 0
remote: Resolving deltas: 100% (577/577), done.
-----> Set main to DOKKU_DEPLOY_BRANCH.
-----> Cleaning up...
-----> Building myNodeApp from herokuish
remote: time="2023-02-18T21:02:28Z" level=error msg="error waiting for container: "
remote: docker: Error response from daemon: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: unable to apply apparmor profile: apparmor failed to apply profile: write /proc/self/attr/apparmor/exec: no such file or directory: unknown.
remote:  !     Failure extracting app code
remote:  !     Removing invalid image tag dokku/myNodeApp:latest
remote:  !     App build failed
To serversIP:myNodeApp
 ! [remote rejected] main -> main (pre-receive hook declined)
error: failed to push some refs to 'serversIP:myNodeApp'
(base)

核心错误：无法应用AppArmor配置文件，导致容器初始化失败

1. 检查服务器AppArmor状态 #

执行命令确认AppArmor是否安装并启用：

apparmor_status

• 若提示命令不存在，说明未安装AppArmor；
• 若输出显示已加载的配置文件列表，说明AppArmor已正常运行。

2. 安装并启用AppArmor（Debian/Ubuntu系统） #

如果未安装，执行以下操作：

sudo apt-get update && sudo apt-get install apparmor apparmor-utils
sudo systemctl enable --now apparmor
sudo systemctl restart docker

3. 禁用Docker的AppArmor强制（针对不支持AppArmor的环境） #

如果服务器环境无法启用AppArmor（如部分轻量云、容器化宿主），修改Docker配置：

1. 编辑或创建/etc/docker/daemon.json文件：

   {
     "security-opts": ["apparmor=unconfined"]
   }
   

2. 重启Docker服务：

   sudo systemctl restart docker
   

4. 重新推送代码 #

完成上述操作后，再次执行推送命令：

git push dokku main

内容的提问来源于stack exchange，提问作者Suisse