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Amazon Linux 2023 安装 Chromium(附低配实例安装卡死解决方案)

  • 2026-03-15 10:28:32
Amazon Linux 2023 安装 Chromium(附低配实例安装卡死解决方案)

在 Amazon Linux 2023 (AL2023) 上安装 Chromium 浏览器常用于支持无头(Headless)自动化测试、网页爬虫(如 Puppeteer、Playwright)等场景。然而,与以往的 Amazon Linux 2 版本不同,AL2023 引入了“确定性更新(Deterministic Updates)”机制以及全新的包管理策略

此外,在 t2.microt3.micro 等低配 EC2 实例上执行全量包更新或繁重的编译安装时,极易因资源耗尽导致 SSH 连接断开。

本文将详细介绍如何在 AL2023 上通过开启官方扩展库(SPAL)正确安装 Chromium,并重点讲解如何利用 Linux 底层工具对包管理器进行资源限制,以保障服务器的稳定运行。

为什么在低配实例上执行 dnf 容易导致服务器失联?

在内存仅有 1GB 且 CPU 受基线限制的突发性能实例上直接执行 dnf update 或安装大型软件包,主要面临以下两个风险:

  1. CPU 积分耗尽(CPU Credit Exhaustion): 包管理器的依赖解析和解压过程属于 CPU 密集型任务。长时间满载运行会迅速耗尽 t 系列实例的 CPU 突发积分,导致实例性能被强制降级至基准线,系统响应出现严重延迟。
  2. 内存溢出(OOM Killer):dnf 在并发下载和解析大型依赖树时会产生较高的内存峰值。当物理内存耗尽且未配置 Swap 空间时,Linux 内核的 OOM (Out Of Memory) 机制会被触发,并可能随机终止关键系统进程(如 sshd),直接导致远程连接断开。

核心解决方案:基于 Cgroups 限制 dnf 资源占用

为了解决上述问题,我们可以借助 AL2023 内置的 systemd(基于 Cgroups v2),通过 systemd-run 命令为 dnf 进程创建一个具有严格资源限制的临时运行作用域(Scope)。

配合 dnf 的配置参数,我们可以实现以下防护:

  • •硬性限制 CPU 和内存使用上限。
  • •限制最大并发下载数,削峰填谷。

标准的基础限制命令模板如下:

sudo systemd-run --scope -p CPUQuota=30% -p MemoryMax=400M dnf <command> --setopt=max_parallel_downloads=1

注:CPUQuota=30% 表示限制最高使用单核的 30% 算力;MemoryMax=400M 限制最大内存占用量为 400MB。

AL2023 安装 Chromium 详细步骤

在 AL2023 中,Chromium 并未包含在默认的核心软件库中,而是被归类在 SPAL (Supplementary Packages for Amazon Linux) 扩展库内。此外,受确定性更新机制影响,如果实例的锁定版本较老,必须先将发行版版本升级至最新。

以下是完整的安装操作流程:

1. 同步并升级最新的系统版本信息

使用带有资源限制的命令,将系统的版本库升级到最新,以确保能够获取到官方后续加入的新软件包。

sudo systemd-run --scope -p CPUQuota=50% -p MemoryMax=400M dnf upgrade --releasever=latest -y --setopt=max_parallel_downloads=1

系统如果返回 Dependencies resolved. Nothing to do. Complete!,说明当前系统已是最新锁定版本,可直接进入下一步。

2. 安装 SPAL 官方扩展库

Chromium 的二进制文件及其依赖的 X11/Wayland 图形库位于 SPAL 仓库中。执行以下命令安装 spal-release 包以启用该仓库:

sudo systemd-run --scope -p CPUQuota=30% -p MemoryMax=400M dnf install spal-release -y

3. 安装 Chromium

启用扩展库后,即可正常安装 Chromium。由于包含大量依赖项,该过程在资源受限的情况下需要几分钟时间,请保持终端开启直到完成。

sudo systemd-run --scope -p CPUQuota=30% -p MemoryMax=400M dnf install chromium -y

4. 验证安装

安装完成后,通过以下命令验证可执行文件是否已正确写入系统路径,并查看版本号:

chromium-browser --version

总结

在 Amazon Linux 2023 的低配置实例上进行系统运维时,粗暴地执行全局更新存在较高风险。通过 systemd-run 进行精细化的资源隔离,结合 AL2023 最新的 SPAL 仓库机制,可以安全、合规地完成 Chromium 及类似大型基础组件的安装。这种方法不仅保障了服务的稳定性,也为云端自动化环境的搭建提供了标准化的操作范式。

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  1. CONNECT:[ UseTime:0.000927s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001258s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.003335s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000603s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001159s ]
  6. SELECT * FROM `set` [ RunTime:0.000571s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001233s ]
  8. SELECT * FROM `article` WHERE `id` = 480233 LIMIT 1 [ RunTime:0.007110s ]
  9. UPDATE `article` SET `lasttime` = 1774593960 WHERE `id` = 480233 [ RunTime:0.003599s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 67 LIMIT 1 [ RunTime:0.000529s ]
  11. SELECT * FROM `article` WHERE `id` < 480233 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.011598s ]
  12. SELECT * FROM `article` WHERE `id` > 480233 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.011962s ]
  13. SELECT * FROM `article` WHERE `id` < 480233 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.010399s ]
  14. SELECT * FROM `article` WHERE `id` < 480233 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.037328s ]
  15. SELECT * FROM `article` WHERE `id` < 480233 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005152s ]
0.274357s