{"id":1813,"date":"2021-02-09T11:28:13","date_gmt":"2021-02-09T03:28:13","guid":{"rendered":"http:\/\/123.57.164.21\/?p=1813"},"modified":"2021-02-09T11:28:13","modified_gmt":"2021-02-09T03:28:13","slug":"%e7%90%86%e8%a7%a3%e5%ae%b9%e5%99%a8%e6%96%87%e4%bb%b6%e7%b3%bb%e7%bb%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=1813","title":{"rendered":"\u7406\u89e3\u5bb9\u5668\u6587\u4ef6\u7cfb\u7edf"},"content":{"rendered":"\n

\u6211\u4eec\u5728\u5bb9\u5668\u91cc\uff0c\u8fd0\u884c df \u547d\u4ee4\uff0c\u4f60\u53ef\u4ee5\u770b\u5230\u5728\u5bb9\u5668\u4e2d\u6839\u76ee\u5f55 (\/) \u7684\u6587\u4ef6\u7cfb\u7edf\u7c7b\u578b\u662f”overlay”\uff0c\u5b83\u4e0d\u662f\u6211\u4eec\u5728\u666e\u901a Linux \u8282\u70b9\u4e0a\u770b\u5230\u7684 ext4 \u6216\u8005 xfs \u4e4b\u7c7b\u5e38\u89c1\u7684\u6587\u4ef6\u7cfb\u7edf\u3002<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

\u90a3\u4e48\u770b\u5230\u8fd9\u91cc\u4f60\u80af\u5b9a\u60f3\u95ee\uff0cOverlay \u662f\u4e00\u4e2a\u4ec0\u4e48\u6837\u7684\u6587\u4ef6\u7cfb\u7edf\u5462\uff0c\u5bb9\u5668\u4e3a\u4ec0\u4e48\u8981\u7528\u8fd9\u79cd\u6587\u4ef6\u7cfb\u7edf\uff1f<\/p>\n\n\n\n

\u5728\u8bf4\u5bb9\u5668\u6587\u4ef6\u7cfb\u7edf\u524d\uff0c\u6211\u4eec\u5148\u6765\u60f3\u8c61\u4e00\u4e0b\u5982\u679c\u6ca1\u6709\u6587\u4ef6\u7cfb\u7edf\u7ba1\u7406\u7684\u8bdd\u4f1a\u600e\u6837\u3002\u5047\u8bbe\u6709\u8fd9\u4e48\u4e00\u4e2a\u573a\u666f\uff0c\u5728\u4e00\u4e2a\u5bbf\u4e3b\u673a\u4e0a\u9700\u8981\u8fd0\u884c 100 \u4e2a\u5bb9\u5668\u3002<\/p>\n\n\n\n

\u6bcf\u4e2a\u5bb9\u5668\u90fd\u9700\u8981\u4e00\u4e2a\u955c\u50cf\uff0c\u8fd9\u4e2a\u955c\u50cf\u5c31\u628a\u5bb9\u5668\u4e2d\u7a0b\u5e8f\u9700\u8981\u8fd0\u884c\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u5e93\u6587\u4ef6\uff0c\u914d\u7f6e\u6587\u4ef6\uff0c\u5176\u4ed6\u7684\u4f9d\u8d56\u6587\u4ef6\u7b49\u5168\u90e8\u90fd\u6253\u5305\u6210\u4e00\u4e2a\u955c\u50cf\u6587\u4ef6\u3002<\/p>\n\n\n\n

\u5982\u679c\u6ca1\u6709\u7279\u522b\u7684\u5bb9\u5668\u6587\u4ef6\u7cfb\u7edf\uff0c\u53ea\u662f\u666e\u901a\u7684 ext4 \u6216\u8005 xfs \u6587\u4ef6\u7cfb\u7edf\uff0c\u90a3\u4e48\u6bcf\u6b21\u542f\u52a8\u4e00\u4e2a\u5bb9\u5668\uff0c\u5c31\u9700\u8981\u628a\u4e00\u4e2a\u955c\u50cf\u6587\u4ef6\u4e0b\u8f7d\u5e76\u4e14\u5b58\u50a8\u5728\u5bbf\u4e3b\u673a\u4e0a\u3002<\/p>\n\n\n\n

\u6211\u4e3e\u4e2a\u4f8b\u5b50\u5e2e\u4f60\u7406\u89e3\uff0c\u6bd4\u5982\u8bf4\uff0c\u5047\u8bbe\u4e00\u4e2a\u955c\u50cf\u6587\u4ef6\u7684\u5927\u5c0f\u662f 500MB\uff0c\u90a3\u4e48 100 \u4e2a\u5bb9\u5668\u7684\u8bdd\uff0c\u5c31\u9700\u8981\u4e0b\u8f7d 500MB*100= 50GB \u7684\u6587\u4ef6\uff0c\u5e76\u4e14\u5360\u7528 50GB \u7684\u78c1\u76d8\u7a7a\u95f4\u3002<\/p>\n\n\n\n

\u5982\u679c\u4f60\u518d\u5206\u6790\u4e00\u4e0b\u8fd9 50GB \u91cc\u7684\u5185\u5bb9\uff0c\u4f60\u4f1a\u53d1\u73b0\uff0c\u5728\u7edd\u5927\u90e8\u5206\u7684\u64cd\u4f5c\u7cfb\u7edf\u91cc\uff0c\u5e93\u6587\u4ef6\u90fd\u662f\u5dee\u4e0d\u591a\u7684\u3002\u800c\u4e14\uff0c\u5728\u5bb9\u5668\u8fd0\u884c\u7684\u65f6\u5019\uff0c\u8fd9\u7c7b\u6587\u4ef6\u4e5f\u4e0d\u4f1a\u88ab\u6539\u52a8\uff0c\u57fa\u672c\u4e0a\u90fd\u662f\u53ea\u8bfb\u7684\u3002\u7279\u522b\u662f\u8fd9\u6837\u7684\u60c5\u51b5\uff1a\u5047\u5982\u8fd9 100 \u4e2a\u5bb9\u5668\u955c\u50cf\u90fd\u662f\u57fa\u4e8e”ubuntu:18.04″\u7684\uff0c\u6bcf\u4e2a\u5bb9\u5668\u955c\u50cf\u53ea\u662f\u989d\u5916\u590d\u5236\u4e86 50MB \u5de6\u53f3\u81ea\u5df1\u7684\u5e94\u7528\u7a0b\u5e8f\u5230”ubuntu: 18.04″\u91cc\uff0c\u90a3\u4e48\u5c31\u662f\u8bf4\u5728\u603b\u5171 50GB \u7684\u6570\u636e\u91cc\uff0c\u6709 90% \u7684\u6570\u636e\u662f\u5197\u4f59\u7684\u3002<\/p>\n\n\n\n

\u8bb2\u5230\u8fd9\u91cc\uff0c\u4f60\u4e0d\u96be\u63a8\u6d4b\u51fa\u7406\u60f3\u7684\u60c5\u51b5\u5e94\u8be5\u662f\u4ec0\u4e48\u6837\u7684\uff1f<\/p>\n\n\n\n

\u6ca1\u9519\uff0c\u5f53\u7136\u662f\u5728\u4e00\u4e2a\u5bbf\u4e3b\u673a\u4e0a\u53ea\u8981\u4e0b\u8f7d\u5e76\u4e14\u5b58\u50a8\u5b58\u4e00\u4efd”ubuntu:18.04″\uff0c\u6240\u6709\u57fa\u4e8e”ubuntu:18.04″\u955c\u50cf\u7684\u5bb9\u5668\u90fd\u53ef\u4ee5\u5171\u4eab\u8fd9\u4e00\u4efd\u901a\u7528\u7684\u90e8\u5206\u3002\u8fd9\u6837\u8bbe\u7f6e\u7684\u8bdd\uff0c\u4e0d\u540c\u5bb9\u5668\u542f\u52a8\u7684\u65f6\u5019\uff0c\u53ea\u9700\u8981\u4e0b\u8f7d\u81ea\u5df1\u72ec\u7279\u7684\u7a0b\u5e8f\u90e8\u5206\u5c31\u53ef\u4ee5\u3002<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

\u6b63\u662f\u4e3a\u4e86\u6709\u6548\u5730\u51cf\u5c11\u78c1\u76d8\u4e0a\u5197\u4f59\u7684\u955c\u50cf\u6570\u636e\uff0c\u540c\u65f6\u51cf\u5c11\u5197\u4f59\u7684\u955c\u50cf\u6570\u636e\u5728\u7f51\u7edc\u4e0a\u7684\u4f20\u8f93\uff0c\u9009\u62e9\u4e00\u79cd\u9488\u5bf9\u4e8e\u5bb9\u5668\u7684\u6587\u4ef6\u7cfb\u7edf\u662f\u5f88\u6709\u5fc5\u8981\u7684\uff0c\u800c\u8fd9\u7c7b\u7684\u6587\u4ef6\u7cfb\u7edf\u88ab\u79f0\u4e3a UnionFS\u3002<\/p>\n\n\n\n

UnionFS \u8fd9\u7c7b\u6587\u4ef6\u7cfb\u7edf\u5b9e\u73b0\u7684\u4e3b\u8981\u529f\u80fd\u662f\u628a\u591a\u4e2a\u76ee\u5f55\uff08\u5904\u4e8e\u4e0d\u540c\u7684\u5206\u533a\uff09\u4e00\u8d77\u6302\u8f7d\uff08mount\uff09\u5728\u4e00\u4e2a\u76ee\u5f55\u4e0b<\/strong>\u3002<\/p>\n\n\n\n

\u8fd9\u79cd\u591a\u76ee\u5f55\u6302\u8f7d\u7684\u65b9\u5f0f\uff0c\u6b63\u597d\u53ef\u4ee5\u89e3\u51b3\u6211\u4eec\u521a\u624d\u8bf4\u7684\u5bb9\u5668\u955c\u50cf\u7684\u95ee\u9898\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u628a ubuntu18.04 \u8fd9\u4e2a\u57fa\u7840\u955c\u50cf\u7684\u6587\u4ef6\u653e\u5728\u4e00\u4e2a\u76ee\u5f55 ubuntu18.04\/ \u4e0b\uff0c\u5bb9\u5668\u81ea\u5df1\u989d\u5916\u7684\u7a0b\u5e8f\u6587\u4ef6 app_1_bin \u653e\u5728 app_1\/ \u76ee\u5f55\u4e0b\u3002\u7136\u540e\uff0c\u6211\u4eec\u628a\u8fd9\u4e24\u4e2a\u76ee\u5f55\u6302\u8f7d\u5230 container_1\/ \u8fd9\u4e2a\u76ee\u5f55\u4e0b\uff0c\u4f5c\u4e3a\u5bb9\u5668 1 \u770b\u5230\u7684\u6587\u4ef6\u7cfb\u7edf\uff1b\u5bf9\u4e8e\u5bb9\u5668 2\uff0c\u5c31\u53ef\u4ee5\u628a ubuntu18.04\/ \u548c app_2\/ \u4e24\u4e2a\u76ee\u5f55\u4e00\u8d77\u6302\u8f7d\u5230 container_2 \u7684\u76ee\u5f55\u4e0b\u3002\u8fd9\u6837\u5728\u8282\u70b9\u4e0a\u6211\u4eec\u53ea\u8981\u4fdd\u7559\u4e00\u4efd ubuntu18.04 \u7684\u6587\u4ef6\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

UnionFS \u7c7b\u4f3c\u7684\u6709\u5f88\u591a\u79cd\u5b9e\u73b0\uff0c\u5305\u62ec\u5728 Docker \u91cc\u6700\u65e9\u4f7f\u7528\u7684 AUFS\uff0c\u8fd8\u6709\u76ee\u524d\u6211\u4eec\u4f7f\u7528\u7684 OverlayFS\u3002<\/p>\n\n\n\n

\u524d\u9762\u6211\u4eec\u5728\u8fd0\u884cdf\u7684\u65f6\u5019\uff0c\u770b\u5230\u7684\u6587\u4ef6\u7cfb\u7edf\u7c7b\u578b”overlay”\u6307\u7684\u5c31\u662f OverlayFS\u3002<\/p>\n\n\n\n

\u5728 Linux \u5185\u6838 3.18 \u7248\u672c\u4e2d\uff0cOverlayFS \u4ee3\u7801\u6b63\u5f0f\u5408\u5165 Linux \u5185\u6838\u7684\u4e3b\u5206\u652f\u3002\u5728\u8fd9\u4e4b\u540e\uff0cOverlayFS \u4e5f\u5c31\u9010\u6e10\u6210\u4e3a\u5404\u4e2a\u4e3b\u6d41 Linux \u53d1\u884c\u7248\u672c\u91cc\u7f3a\u7701\u4f7f\u7528\u7684\u5bb9\u5668\u6587\u4ef6\u7cfb\u7edf\u4e86\u3002<\/p>\n\n\n\n

\u7f51\u4e0a Julia Evans \u6709\u4e2ablog\uff0c\u91cc\u9762\u6709\u4e2a\u7684 OverlayFS \u4f7f\u7528\u7684\u4f8b\u5b50\uff0c\u5f88\u7b80\u5355\uff0c\u6211\u4eec\u4e5f\u62ff\u8fd9\u4e2a\u4f8b\u5b50\u6765\u7406\u89e3\u4e00\u4e0b OverlayFS \u7684\u4e00\u4e9b\u57fa\u672c\u6982\u5ff5\u3002<\/p>\n\n\n\n

\u4f60\u53ef\u4ee5\u5148\u6267\u884c\u4e00\u4e0b\u8fd9\u4e00\u7ec4\u547d\u4ee4\u3002<\/p>\n\n\n\n

###############################################\n\n#!\/bin\/bash\n\numount .\/merged\n\nrm upper lower merged work -r\n\nmkdir upper lower merged work\n\necho \"I'm from lower!\" > lower\/in_lower.txt\n\necho \"I'm from upper!\" > upper\/in_upper.txt\n\n# `in_both` is in both directories\n\necho \"I'm from lower!\" > lower\/in_both.txt\n\necho \"I'm from upper!\" > upper\/in_both.txt\n\nsudo mount -t overlay overlay \\\n\n-o lowerdir=.\/lower,upperdir=.\/upper,workdir=.\/work \\\n\n.\/merged\n\n################################################\n\n<\/pre>\n\n\n\n
\"\"<\/figure><\/div>\n\n\n\n
\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0cOverlayFS \u7684\u4e00\u4e2a mount \u547d\u4ee4\u7275\u6d89\u5230\u56db\u7c7b\u76ee\u5f55\uff0c\u5206\u522b\u662f lower\uff0cupper\uff0cmerged \u548c work\uff0c\u90a3\u5b83\u4eec\u662f\u4ec0\u4e48\u5173\u7cfb\u5462\uff1f<\/p>\n\n\n\n
\u6211\u4eec\u770b\u4e0b\u9762\u8fd9\u5f20\u56fe\uff0c\u8fd9\u548c\u524d\u9762 UnionFS \u7684\u5de5\u4f5c\u793a\u610f\u56fe\u5f88\u50cf\uff0c\u4e5f\u4e0d\u5947\u602a\uff0cOverlayFS \u5c31\u662f UnionFS \u7684\u4e00\u79cd\u5b9e\u73b0\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4ece\u4e0b\u5f80\u4e0a\u4f9d\u6b21\u770b\u770b\u6bcf\u4e00\u5c42\u7684\u529f\u80fd\u3002<\/p>\n\n\n\n
\u9996\u5148\uff0c\u6700\u4e0b\u9762\u7684”lower\/”\uff0c\u4e5f\u5c31\u662f\u88ab mount \u4e24\u5c42\u76ee\u5f55\u4e2d\u5e95\u4e0b\u7684\u8fd9\u5c42\uff08lowerdir\uff09\u3002<\/p>\n\n\n\n
\u5728 OverlayFS \u4e2d\uff0c\u6700\u5e95\u4e0b\u8fd9\u4e00\u5c42\u91cc\u7684\u6587\u4ef6\u662f\u4e0d\u4f1a\u88ab\u4fee\u6539\u7684\uff0c\u4f60\u53ef\u4ee5\u8ba4\u4e3a\u5b83\u662f\u53ea\u8bfb\u7684\u3002\u6211\u8fd8\u60f3\u63d0\u9192\u4f60\u4e00\u70b9\uff0c\u5728\u8fd9\u4e2a\u4f8b\u5b50\u91cc\u6211\u4eec\u53ea\u6709\u4e00\u4e2a lower\/ \u76ee\u5f55\uff0c\u4e0d\u8fc7 OverlayFS \u662f\u652f\u6301\u591a\u4e2a lowerdir \u7684\u3002\u7136\u540e\u6211\u4eec\u770b”uppder\/”\uff0c\u5b83\u662f\u88ab mount \u4e24\u5c42\u76ee\u5f55\u4e2d\u4e0a\u9762\u7684\u8fd9\u5c42 \uff08upperdir\uff09\u3002<\/p>\n\n\n\n
\u5728 OverlayFS \u4e2d\uff0c\u5982\u679c\u6709\u6587\u4ef6\u7684\u521b\u5efa\uff0c\u4fee\u6539\uff0c\u5220\u9664\u64cd\u4f5c\uff0c\u90a3\u4e48\u90fd\u4f1a\u5728\u8fd9\u4e00\u5c42\u53cd\u6620\u51fa\u6765\uff0c\u5b83\u662f\u53ef\u8bfb\u5199\u7684\u3002\u63a5\u7740\u662f\u6700\u4e0a\u9762\u7684”merged” \uff0c\u5b83\u662f\u6302\u8f7d\u70b9\uff08mount point\uff09\u76ee\u5f55\uff0c\u4e5f\u662f\u7528\u6237\u770b\u5230\u7684\u76ee\u5f55\uff0c\u7528\u6237\u7684\u5b9e\u9645\u6587\u4ef6\u64cd\u4f5c\u5728\u8fd9\u91cc\u8fdb\u884c\u3002<\/p>\n\n\n\n
\u5176\u5b9e\u8fd8\u6709\u4e00\u4e2a”work\/”\uff0c\u8fd9\u4e2a\u76ee\u5f55\u6ca1\u6709\u5728\u8fd9\u4e2a\u56fe\u91cc\uff0c\u5b83\u53ea\u662f\u4e00\u4e2a\u5b58\u653e\u4e34\u65f6\u6587\u4ef6\u7684\u76ee\u5f55\uff0cOverlayFS \u4e2d\u5982\u679c\u6709\u6587\u4ef6\u4fee\u6539\uff0c\u5c31\u4f1a\u5728\u4e2d\u95f4\u8fc7\u7a0b\u4e2d\u4e34\u65f6\u5b58\u653e\u6587\u4ef6\u5230\u8fd9\u91cc\u3002<\/p>\n\n\n\n
\"\"<\/figure><\/div>\n\n\n\n
\u4ece\u8fd9\u4e2a\u4f8b\u5b50\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0cOverlayFS \u4f1a mount \u4e24\u5c42\u76ee\u5f55\uff0c\u5206\u522b\u662f lower \u5c42\u548c upper \u5c42\uff0c\u8fd9\u4e24\u5c42\u76ee\u5f55\u4e2d\u7684\u6587\u4ef6\u90fd\u4f1a\u6620\u5c04\u5230\u6302\u8f7d\u70b9\u4e0a\u3002<\/p>\n\n\n\n
\u4ece\u6302\u8f7d\u70b9\u7684\u89c6\u89d2\u770b\uff0cupper \u5c42\u7684\u6587\u4ef6\u4f1a\u8986\u76d6 lower \u5c42\u7684\u6587\u4ef6\uff0c\u6bd4\u5982”in_both.txt”\u8fd9\u4e2a\u6587\u4ef6\uff0c\u5728 lower \u5c42\u548c upper \u5c42\u90fd\u6709\uff0c\u4f46\u662f\u6302\u8f7d\u70b9 merged\/ \u91cc\u770b\u5230\u7684\u53ea\u662f upper \u5c42\u91cc\u7684 in_both.txt.<\/p>\n\n\n\n
\u5982\u679c\u6211\u4eec\u5728 merged\/ \u76ee\u5f55\u91cc\u505a\u6587\u4ef6\u64cd\u4f5c\uff0c\u5177\u4f53\u5305\u62ec\u8fd9\u4e09\u79cd\uff1a<\/p>\n\n\n\n
  • \u7b2c\u4e00\u79cd\uff0c\u65b0\u5efa\u6587\u4ef6\uff0c<\/strong>\u8fd9\u4e2a\u6587\u4ef6\u4f1a\u51fa\u73b0\u5728 upper\/ \u76ee\u5f55\u4e2d\u3002<\/li>
  • \u7b2c\u4e8c\u79cd\u662f\u5220\u9664\u6587\u4ef6\uff0c<\/strong>\u5982\u679c\u6211\u4eec\u5220\u9664”in_upper.txt”\uff0c\u90a3\u4e48\u8fd9\u4e2a\u6587\u4ef6\u4f1a\u5728 upper\/ \u76ee\u5f55\u4e2d\u6d88\u5931\u3002<\/li><\/ul>\n\n\n\n
    \u5982\u679c\u5220\u9664”in_lower.txt”, \u5728 lower\/ \u76ee\u5f55\u91cc\u7684”in_lower.txt”\u6587\u4ef6\u4e0d\u4f1a\u6709\u53d8\u5316\uff0c\u53ea\u662f\u5728 upper\/ \u76ee\u5f55\u4e2d\u589e\u52a0\u4e86\u4e00\u4e2a\u7279\u6b8a\u6587\u4ef6\u6765\u544a\u8bc9 OverlayFS\uff0c”in_lower.txt’\u8fd9\u4e2a\u6587\u4ef6\u4e0d\u80fd\u51fa\u73b0\u5728 merged\/ \u91cc\u4e86\uff0c\u8fd9\u5c31\u8868\u793a\u5b83\u5df2\u7ecf\u88ab\u5220\u9664\u4e86\u3002<\/p>\n\n\n\n
    • \u7b2c\u4e09\u79cd\u662f\u4fee\u6539\u6587\u4ef6\uff0c<\/strong>\u7c7b\u4f3c\u5982\u679c\u4fee\u6539”in_lower.txt”\uff0c\u90a3\u4e48\u5c31\u4f1a\u5728 upper\/ \u76ee\u5f55\u4e2d\u65b0\u5efa\u4e00\u4e2a”in_lower.txt”\u6587\u4ef6\uff0c\u5305\u542b\u66f4\u65b0\u7684\u5185\u5bb9\uff0c\u800c\u5728 lower\/ \u4e2d\u7684\u539f\u6765\u7684\u5b9e\u9645\u6587\u4ef6”in_lower.txt”\u4e0d\u4f1a\u6539\u53d8\u3002<\/li><\/ul>\n\n\n\n
      \"\"<\/figure><\/div>\n\n\n\n
      \u901a\u8fc7\u8fd9\u4e2a\u4f8b\u5b50\uff0c\u6211\u4eec\u77e5\u9053\u4e86 OverlayFS \u662f\u600e\u4e48\u5de5\u4f5c\u4e86\u3002<\/p>\n\n\n\n
      \u90a3\u4e48\u6211\u4eec\u53ef\u4ee5\u518d\u60f3\u4e00\u60f3\uff0c\u600e\u4e48\u628a\u5b83\u8fd0\u7528\u5230\u5bb9\u5668\u7684\u955c\u50cf\u6587\u4ef6\u4e0a\uff1f<\/p>\n\n\n\n
      \u5176\u5b9e\u4e5f\u4e0d\u96be\uff0c\u4ece\u7cfb\u7edf\u7684 mounts \u4fe1\u606f\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230 Docker \u662f\u600e\u4e48\u7528 OverlayFS \u6765\u6302\u8f7d\u955c\u50cf\u6587\u4ef6\u7684\uff1a<\/p>\n\n\n\n
      \u5bb9\u5668\u955c\u50cf\u6587\u4ef6\u53ef\u4ee5\u5206\u6210\u591a\u4e2a\u5c42\uff08layer\uff09\uff0c\u6bcf\u5c42\u53ef\u4ee5\u5bf9\u5e94 OverlayFS \u91cc lowerdir \u7684\u4e00\u4e2a\u76ee\u5f55\uff0clowerdir \u652f\u6301\u591a\u4e2a\u76ee\u5f55\uff0c\u4e5f\u5c31\u53ef\u4ee5\u652f\u6301\u591a\u5c42\u7684\u955c\u50cf\u6587\u4ef6\u3002<\/strong><\/p>\n\n\n\n
      \u5728\u5bb9\u5668\u542f\u52a8\u540e\uff0c\u5bf9\u955c\u50cf\u6587\u4ef6\u4e2d\u4fee\u6539\u5c31\u4f1a\u88ab\u4fdd\u5b58\u5728 upperdir \u91cc\u4e86\u3002<\/strong><\/p>\n\n\n\n
      \"\"<\/figure><\/div>\n\n\n\n
      \u4e3a\u4ec0\u4e48\u8981\u6709\u5bb9\u5668\u81ea\u5df1\u7684\u6587\u4ef6\u7cfb\u7edf\uff1f<\/h5>\n\n\n\n
      \u5f88\u91cd\u8981\u7684\u4e00\u70b9\u662f\u51cf\u5c11\u76f8\u540c\u955c\u50cf\u6587\u4ef6\u5728\u540c\u4e00\u4e2a\u8282\u70b9\u4e0a\u7684\u6570\u636e\u5197\u4f59\uff0c\u53ef\u4ee5\u8282\u7701\u78c1\u76d8\u7a7a\u95f4\uff0c\u4e5f\u53ef\u4ee5\u51cf\u5c11\u955c\u50cf\u6587\u4ef6\u4e0b\u8f7d\u5360\u7528\u7684\u7f51\u7edc\u8d44\u6e90\u3002<\/p>\n\n\n\n
      \u4f5c\u4e3a\u5bb9\u5668\u6587\u4ef6\u7cfb\u7edf\uff0cUnionFS \u901a\u8fc7\u591a\u4e2a\u76ee\u5f55\u6302\u8f7d\u7684\u65b9\u5f0f\u5de5\u4f5c\u3002<\/p>\n\n\n\n
      OverlayFS \u5c31\u662f UnionFS \u7684\u4e00\u79cd\u5b9e\u73b0\uff0c\u662f\u76ee\u524d\u4e3b\u6d41 Linux \u53d1\u884c\u7248\u672c\u4e2d\u7f3a\u7701\u4f7f\u7528\u7684\u5bb9\u5668\u6587\u4ef6\u7cfb\u7edf\u3002<\/p>\n\n\n\n
      OverlayFS \u4e5f\u662f\u628a\u591a\u4e2a\u76ee\u5f55\u5408\u5e76\u6302\u8f7d\uff0c\u88ab\u6302\u8f7d\u7684\u76ee\u5f55\u5206\u4e3a\u4e24\u5927\u7c7b\uff1alowerdir \u548c upperdir\u3002<\/p>\n\n\n\n
      lowerdir \u5141\u8bb8\u6709\u591a\u4e2a\u76ee\u5f55\uff0c\u5728\u88ab\u6302\u8f7d\u540e\uff0c\u8fd9\u4e9b\u76ee\u5f55\u91cc\u7684\u6587\u4ef6\u90fd\u662f\u4e0d\u4f1a\u88ab\u4fee\u6539\u6216\u8005\u5220\u9664\u7684\uff0c\u4e5f\u5c31\u662f\u53ea\u8bfb\u7684\uff1bupperdir \u53ea\u6709\u4e00\u4e2a\uff0c\u4e0d\u8fc7\u8fd9\u4e2a\u76ee\u5f55\u662f\u53ef\u8bfb\u5199\u7684\uff0c\u6302\u8f7d\u70b9\u76ee\u5f55\u4e2d\u7684\u6240\u6709\u6587\u4ef6\u4fee\u6539\u90fd\u4f1a\u5728 upperdir \u4e2d\u53cd\u6620\u51fa\u6765\u3002<\/p>\n\n\n\n
      \u5bb9\u5668\u7684\u955c\u50cf\u6587\u4ef6\u4e2d\u5404\u5c42\u6b63\u597d\u4f5c\u4e3a OverlayFS \u7684 lowerdir \u7684\u76ee\u5f55\uff0c\u7136\u540e\u52a0\u4e0a\u4e00\u4e2a\u7a7a\u7684 upperdir \u4e00\u8d77\u6302\u8f7d\u597d\u540e\uff0c\u5c31\u7ec4\u6210\u4e86\u5bb9\u5668\u7684\u6587\u4ef6\u7cfb\u7edf\u3002<\/p>\n\n\n\n
      OverlayFS \u5728 Linux \u5185\u6838\u4e2d\u8fd8\u5728\u4e0d\u65ad\u7684\u5b8c\u5584\uff0c\u6bd4\u5982\u6211\u4eec\u5728\u8fd9\u4e00\u8bb2\u770b\u5230\u7684\u5728 kenel 5.4 \u4e2d\u5bf9\u5f02\u6b65 I\/O \u64cd\u4f5c\u7684\u7f3a\u5931\uff0c\u8fd9\u4e5f\u662f\u6211\u4eec\u5728\u4f7f\u7528\u5bb9\u5668\u6587\u4ef6\u7cfb\u7edf\u7684\u65f6\u5019\u9700\u8981\u6ce8\u610f\u7684\u3002<\/p>\n\n\n\n
      \u95ee\u9898\uff1a<\/h5>\n\n\n\n
      1. \u5728\u4e0a\u9762 OverlayFS \u7684\u4f8b\u5b50\u7684\u57fa\u7840\u4e0a\uff0c\u5efa\u7acb 2 \u4e2a lowerdir \u7684\u76ee\u5f55\uff0c\u5e76\u4e14\u5728\u76ee\u5f55\u4e2d\u5efa\u7acb\u76f8\u540c\u6587\u4ef6\u540d\u7684\u6587\u4ef6\uff0c\u7136\u540e\u4e00\u8d77\u505a\u4e00\u4e2a overlay mount\uff0c\u770b\u770b\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/strong><\/p>\n\n\n\n
      \u7ecf\u8fc7\u5b9e\u9a8c\u786e\u8ba4\uff0c\u53ea\u4f1a\u5728merge\u5373\u8054\u5408\u6302\u8f7d\u70b9\u91cc\u751f\u6210\u4e00\u4e2a\u6587\u4ef6\u540d\uff0c\u4e5f\u5c31\u662f\u8bf4overlay\u6587\u4ef6\u7cfb\u7edf\u4e3a\u4e86\u7701\u5b58\u50a8\u7a7a\u95f4\u662f\u505a\u4e86\u540c\u540d\u6587\u4ef6\u5408\u5e76\u4f18\u5316\u3002<\/p>\n\n\n\n
      \u201cmerge\u5c42\u201d\u76f8\u5f53\u4e8e\u63d0\u4f9b\u7ed9\u7528\u6237\u8fdb\u884c\u4ea4\u4e92\u7684\u89c6\u56fe\u5c42;<\/p>\n\n\n\n
      \u201cupper\u5c42\u201d\u76f8\u5f53\u4e8e\u5b58\u50a8\u5b9e\u9645\u53d1\u751f\u53d8\u52a8\u7684\u5730\u65b9;<\/p>\n\n\n\n
      \u201clower\u5c42\u201d\u662f\u4e0d\u53d8\u7684\uff0c\u7528\u6237\u901a\u8fc7merge\u5c42\u89c6\u56fe\u5bf9lower\u5c42\u6587\u4ef6\u7684\u6240\u6709\u64cd\u4f5c\uff0c\u90fd\u88ab\u91cd\u5b9a\u5411\u5230\u201cupper\u5c42\u201d\u4e86\uff0c\u7279\u6b8a\u7684\u662f\u5220\u9664\u64cd\u4f5c\uff0c\u4f1a\u5728upper\u5c42\u751f\u6210\u4e00\u4e2a\u7279\u6b8a\u7684c\u7c7b\u578b\u7684\u6587\u4ef6\u6765\u4ee3\u8868\u8be5\u6587\u4ef6\u88ab\u5220\u3002<\/p>\n\n\n\n
      \u7528\u6237\u4ea4\u4e92\u65f6\u53ea\u80fd\u5bf9merge\u5c42\u7684\u89c6\u56fe\u6765\u64cd\u4f5c\u3002<\/p>\n\n\n\n
      \u5728merge\u5c42\u7684\u89c6\u56fe\u4e2d\uff0c\u4e0a\u5c42\u8986\u76d6\u4e0b\u5c42\u540c\u540d\u6587\u4ef6\uff0c\u4e0a\u4e0b\u5173\u7cfb\u4e0d\u53ea\u662fupper\u548clower\u4e4b\u95f4\uff0c\u5373\u4fbf\u5728\u591a\u4e2alower\u5c42\u4e2d\uff0c\u4e5f\u662f\u4e0a\u5c42\u8986\u76d6\u4e0b\u5c42\u3002<\/p>\n\n\n\n
      2.\u5047\u5982\u6211\u5c06\u4e00\u4e2a\u5377(\u5bbf\u4e3b\u673a\u4e0a\u7684\u67d0\u4e2a\u76ee\u5f55)\u6302\u5728\u5230\u5bb9\u5668\u6587\u4ef6\u7cfb\u7edf\u4e2d\u7684\u67d0\u4e2a\u76ee\u5f55\uff0c\u6211\u5728\u5bb9\u5668\u4e2d\u5bf9\u8fd9\u4e2a\u5377\u4e2d\u7684\u6570\u636e\u505a\u8bfb\u5199\u64cd\u4f5c\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u6302\u8f7d\u8def\u5f84\u4e5f\u662f\u5bb9\u5668\u6587\u4ef6\u7cfb\u7edf\u7684\u4e00\u90e8\u5206\uff0c\u6027\u80fd\u662f\u4e0d\u662f\u4e5f\u662f\u4f1a\u6709\u5f71\u54cd\u7684<\/strong>\uff1f<\/p>\n\n\n\n
      \u5982\u679c\u4ee5volume\u7684\u65b9\u5f0f\u6302\u8f7d\u5230\u5bb9\u5668\u4e2d\uff0c\u90a3\u4e48\u5b83\u5c31\u4e0d\u662f\u4ee5overlayfs\u7684\u6587\u4ef6\u7cfb\u7edf\u3002<\/p>\n\n\n\n
      \u6027\u80fd\u662f\u5426\u5f71\u54cd\u8981\u770bvolume\u76ee\u5f55\u7684\u4f4d\u7f6e\u5728\u54ea\u4e2a\u7269\u7406\u78c1\u76d8\u4e0a\uff0c\u548c\u5b83\u5171\u4eab\u7269\u7406\u78c1\u76d8\u7684\u6709\u54ea\u4e9b\u8bfb\u5199\u8fdb\u7a0b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u6211\u4eec\u5728\u5bb9\u5668\u91cc\uff0c\u8fd0\u884c df \u547d\u4ee4\uff0c\u4f60\u53ef\u4ee5\u770b\u5230\u5728\u5bb9\u5668\u4e2d\u6839\u76ee\u5f55 (\/) \u7684\u6587\u4ef6\u7cfb\u7edf\u7c7b\u578b\u662f”overlay […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/1813"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1813"}],"version-history":[{"count":8,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/1813\/revisions"}],"predecessor-version":[{"id":1828,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/1813\/revisions\/1828"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1813"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1813"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1813"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}