2.3. 使用 RPM 系统的 systemd 自动化集成过程

流程

1. 运行以下命令，为 microshift.service 创建目录：

   $ sudo mkdir -p /usr/lib/systemd/system/microshift.service.d

2. 当 microshift.service 失败时，指示 systemd 运行 microshift-auto-recovery.service，请运行以下命令来创建 10-auto-recovery.conf 文件：

   $ sudo tee /usr/lib/systemd/system/microshift.service.d/10-auto-recovery.conf > /dev/null <<'EOF'
   [Unit]
   OnFailure=microshift-auto-recovery.service
   EOF

3. 运行以下命令来创建 microshift-auto-recovery.service 文件：

   $ sudo tee /usr/lib/systemd/system/microshift-auto-recovery.service > /dev/null <<'EOF'
   [Unit]
   Description=MicroShift auto-recovery
   
   [Service]
   Type=oneshot
   ExecStart=/usr/bin/microshift-auto-recovery
   
   [Install]
   WantedBy=multi-user.target
   EOF

4. 运行以下命令来创建 microshift-auto-recovery 脚本：

   $ sudo tee /usr/bin/microshift-auto-recovery > /dev/null <<'EOF'
   #!/usr/bin/env bash
   set -xeuo pipefail
   
   # If greenboot uses a non-default file for clearing boot_counter, use boot_success instead.
   if grep -q  "/boot/grubenv" /usr/libexec/greenboot/greenboot-grub2-set-success; then
       if grub2-editenv - list | grep -q ^boot_success=0; then
           echo "Greenboot didn't decide the system is healthy after staging new deployment."
           echo "Quitting to not interfere with the process"
           exit 0
       fi
   else
       if grub2-editenv - list | grep -q ^boot_counter=; then
           echo "Greenboot didn't decide the system is healthy after staging a new deployment."
           echo "Quitting to not interfere with the process"
           exit 0
       fi
   fi
   
   /usr/bin/microshift restore --auto-recovery /var/lib/microshift-auto-recovery
   /usr/bin/systemctl reset-failed microshift
   /usr/bin/systemctl start microshift
   
   echo "DONE"
   EOF

5. 运行以下命令使脚本可执行：

   $ sudo chmod +x /usr/bin/microshift-auto-recovery

6. 运行以下命令来重新载入系统配置：

   $ sudo systemctl daemon-reload