45 lines
1.4 KiB
Desktop File
45 lines
1.4 KiB
Desktop File
[Unit]
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Description=Smail 邮件服务
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After=network-online.target
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Wants=network-online.target
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StartLimitIntervalSec=300s
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StartLimitBurst=3
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[Service]
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Type=simple
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# 主进程需要保留受限的 root 能力，才能为插件创建 chroot 和网络隔离；插件
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# 通过 SMAIL_PLUGIN_UID/SMAIL_PLUGIN_GID 降权运行，不能以 root 身份执行。
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# 运行环境仅由 root 可读写的独立文件提供，避免在 unit 中混入部署环境配置。
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EnvironmentFile=/etc/smail/smail.env
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WorkingDirectory=/opt/smail
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ExecStart=/opt/smail/smail
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Restart=on-failure
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RestartSec=10s
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# 队列等待 25 秒、数据库等待 35 秒，另留服务与日志收尾时间。
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TimeoutStopSec=90s
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KillMode=control-group
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OOMPolicy=stop
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# 默认预算只是部署起点；上线前须核对同机服务余量并完成容量验收。
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MemoryAccounting=true
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MemoryHigh=384M
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MemoryMax=512M
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MemorySwapMax=0
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CPUAccounting=true
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CPUQuota=100%
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TasksAccounting=true
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TasksMax=256
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RuntimeDirectory=smail
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RuntimeDirectoryMode=0750
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# 目录由 smail 进程拥有，允许主服务创建受保护的本机控制套接字。
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NoNewPrivileges=true
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AmbientCapabilities=CAP_NET_BIND_SERVICE
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CapabilityBoundingSet=CAP_NET_BIND_SERVICE CAP_SYS_CHROOT CAP_SETUID CAP_SETGID CAP_CHOWN CAP_SYS_ADMIN
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PrivateTmp=true
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ProtectHome=true
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ProtectSystem=full
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ReadWritePaths=/opt/smail/config /opt/smail/data /opt/smail/ssl /opt/smail/log -/opt/smail/plugins /run/smail
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[Install]
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WantedBy=multi-user.target
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