{"id":28200,"date":"2023-01-13T21:51:30","date_gmt":"2023-12-05T02:43:45","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bb%a5%e6%97%a0%e5%85%b3%e5%ae%b9%e5%99%a8%e7%9a%84%e6%96%b9%e5%bc%8f%e8%ae%bf%e9%97%aedocker%e7%9a%84overlayfs%e6%8a%80%e6%9c%af%e3%80%82\/"},"modified":"2025-08-12T06:51:46","modified_gmt":"2025-08-11T22:51:46","slug":"%e4%bb%a5%e6%97%a0%e5%85%b3%e5%ae%b9%e5%99%a8%e7%9a%84%e6%96%b9%e5%bc%8f%e8%ae%bf%e9%97%aedocker%e7%9a%84overlayfs%e6%8a%80%e6%9c%af%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bb%a5%e6%97%a0%e5%85%b3%e5%ae%b9%e5%99%a8%e7%9a%84%e6%96%b9%e5%bc%8f%e8%ae%bf%e9%97%aedocker%e7%9a%84overlayfs%e6%8a%80%e6%9c%af%e3%80%82\/","title":{"rendered":"\u4ee5\u65e0\u5173\u5bb9\u5668\u7684\u65b9\u5f0f\u8bbf\u95eeDocker\u7684overlayfs\u6280\u672f"},"content":{"rendered":"<h1>\u7b80\u8981\u6982\u62ec\u5728 Docker \u5bb9\u5668\u5185\u64cd\u4f5c\u6587\u4ef6\uff0c\u901a\u5e38\u4f7f\u7528 docker exec \u8fd0\u884c bash\u3002\u4f46\u662f\uff0c\u53ea\u6709\u5f53\u5bb9\u5668\u6b63\u5728\u8fd0\u884c\u65f6\u624d\u80fd\u4f7f\u7528\u8be5\u65b9\u6cd5\u64cd\u4f5c\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u8003\u8651\u6839\u636e docker inspect \u7684\u8f93\u51fa\u5185\u5bb9\uff0c\u5728\u5bb9\u5668\u4e4b\u5916\u6302\u8f7d overlayfs \u76ee\u5f55\uff0c\u5e76\u4e14\u4e0d\u4f7f\u7528 Docker \u6765\u6267\u884c\u6587\u4ef6\u64cd\u4f5c\u7684\u65b9\u6cd5\u3002<\/p>\n<h1>\u73af\u5883<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Ubuntu 18.04 on Hyper-V<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">XFS + overlay2 (c.f. https:\/\/qiita.com\/haniokasai\/items\/87bbc2a7f48d777f95c8#_reference-fb9595a078fe57047287)<\/ul>\n<pre class=\"post-pre\"><code>\u30fb\u30fb\u30fb\r\n Server Version: 19.03.4\r\n Storage Driver: overlay2\r\n  Backing Filesystem: xfs\r\n  Supports d_type: true\r\n  Native Overlay Diff: true\r\n Logging Driver: json-file\r\n Cgroup Driver: cgroupfs\r\n\u30fb\u30fb\u30fb\r\n Kernel Version: 4.15.0-70-generic\r\n Operating System: Ubuntu 18.04.3 LTS\r\n OSType: linux\r\n Architecture: x86_64\r\n\u30fb\u30fb\u30fb\r\n<\/code><\/pre>\n<h1>\u5ea7\u964d\u673a\u6784\u300cLowerDir\u300d\u4fdd\u5b58\u7740\u6bd4\u5bb9\u5668\u4e2d\u65b0\u5efa\u7acb\u7684\u6587\u4ef6\u66f4\u5e95\u5c42\u7684\u6587\u4ef6\u30021 \u53ea\u8bfb\u3002<br \/>\n\u300cWorkDir\u300d\u662f\u4e00\u4e2a\u7f13\u5b58\u533a\u57df\uff0c\u7528\u4e8e\u4fdd\u6301Upperdir\u4e2d\u7684\u6587\u4ef6\u5177\u6709\u539f\u5b50\u6027\uff08\u6587\u4ef6\u5b8c\u6574\u6027\uff09\u30023<br \/>\n\u300cUpperdir\u300d\u8bb0\u5f55\u4e86\u5bb9\u5668\u521b\u5efa\u540e\u7684\u66f4\u6539\uff0c\u5e76\u5b58\u50a8\u5bb9\u5668\u7684\u72ec\u6709\u6570\u636e\u30021<br \/>\n\u300c\u6302\u8f7d\u70b9\u6216&#8221;MergedDir&#8221;\u300d\u5c06\u4e0a\u8ff0\u4e09\u4e2a\u6587\u4ef6\u5939\u5408\u5e76\u5728\u4e00\u8d77\uff0c\u6210\u4e3a\u6587\u4ef6\u64cd\u4f5c\u7684\u57fa\u7840\u3002\u5728\u8fd9\u91cc\uff0c\u53ef\u4ee5\u7eaf\u7cb9\u5730\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u800c\u65e0\u9700\u8003\u8651\u6587\u4ef6\u7cfb\u7edf\u30021<\/p>\n<p>\u6302\u8f7d\u547d\u4ee4\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u6267\u884c\uff0c\u6ca1\u6709\u95ee\u9898\u30024<\/p>\n<pre class=\"post-pre\"><code><span class=\"nb\">sudo <\/span>mount <span class=\"nt\">-t<\/span> overlay <span class=\"nt\">-o<\/span> <span class=\"nv\">lowerdir<\/span><span class=\"o\">=<\/span>\u300c<span class=\"s2\">\"LowerDir\"<\/span>\u300d,upperdir<span class=\"o\">=<\/span>\u300c<span class=\"s2\">\"UpperDir\"<\/span>\u300d\r\n,workdir<span class=\"o\">=<\/span>\u300c<span class=\"s2\">\"WorkDir\"<\/span>\u300d overlay \u300c\u30de\u30a6\u30f3\u30c8\u30dd\u30a4\u30f3\u30c8\u307e\u305f\u306f<span class=\"s2\">\"MergedDir\"<\/span>\u300d\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0a\u7684\u56db\u4e2a\u76ee\u5f55\u4f4d\u7f6e\u901a\u8fc7docker inspect\u547d\u4ee4\u53ef\u786e\u5b9a\u3002<\/p>\n<pre class=\"post-pre\"><code>docker inspect \u30b3\u30f3\u30c6\u30ca\r\n\u30fb\u30fb\u30fb\r\n            \"CpusetCpus\": \"\",\r\n        \"GraphDriver\": {\r\n            \"Data\": {\r\n                \"LowerDir\": \"\/var\/lib\/docker\/overlay2\/1109be508e00968c34c73a5cd2c787ad6d3c4951f7b387700ace2b12daae8ec8-init\/diff:\/var\/lib\/docker\/overlay2\/35d8c38f712194bd9d57b9a433955c1141c1974c2b07bfb86b44bee0feb1f0d4\/diff:\/var\/lib\/docker\/overlay2\/018ec8b5d317fddd6fdb9634bf01d869bfd03f9122477a853317efb8d8ff2d86\/diff:\/var\/lib\/docker\/overlay2\/f7671e8be670d1ab91d5a63166374862d2c972448d7b1c4037cee15e1a7628da\/diff:\/var\/lib\/docker\/overlay2\/4fea42daa23e6120c2956ca1d2397d3829fdb8e9f03336ed2b4bd36c895fa53e\/diff:\/var\/lib\/docker\/overlay2\/a15984dba40e4afa1df1c5088b6d3a366e91c74c04ef9a19f7a9e061e6e59bea\/diff:\/var\/lib\/docker\/overlay2\/6f61ebd10ebd7fd6e07b0226b0ac71602d3152a8f9a09744c774998e3c0fdc47\/diff:\/var\/lib\/docker\/overlay2\/ae7ad5c9ce4f3051ad28d3fdc8270c8f7b2d11f63a1446156485e5aa1e9adb64\/diff:\/var\/lib\/docker\/overlay2\/8242e55feaed0c250e9919273671ff051b136853ce2b0e7cf4a499f68388e588\/diff:\/var\/lib\/docker\/overlay2\/fcfb7edf288d40aa1673e09955b1affc748561f5c4d55f01ea9dc3d4fdd418ab\/diff\",\r\n                \"MergedDir\": \"\/var\/lib\/docker\/overlay2\/1109be508e00968c34c73a5cd2c787ad6d3c4951f7b387700ace2b12daae8ec8\/merged\",\r\n                \"UpperDir\": \"\/var\/lib\/docker\/overlay2\/1109be508e00968c34c73a5cd2c787ad6d3c4951f7b387700ace2b12daae8ec8\/diff\",\r\n                \"WorkDir\": \"\/var\/lib\/docker\/overlay2\/1109be508e00968c34c73a5cd2c787ad6d3c4951f7b387700ace2b12daae8ec8\/work\"\r\n            },\r\n            \"Name\": \"overlay2\"\r\n        },\r\n        \"Mounts\": [\r\n            {\r\n                \"Type\": \"bind\",\r\n                \"Source\": \"\/smx\/docker_minecraft_res\",\r\n                \"Destination\": \"\/minecraft\/resources\",\r\n                \"Mode\": \"\",\r\n                \"RW\": false,\r\n                \"Propagation\": \"rprivate\"\r\n            }\r\n\r\n\u30fb\u30fb\u30fb\r\n\r\n<\/code><\/pre>\n<h1>\u5b89\u88c5\u65b9\u6cd5<\/p>\n<h2>\u9577\u57ce<br \/>\n\u6211\u4eec\u60f3\u8981\u5229\u7528\u50cf\u300a\u6302\u8f7d\u673a\u5236\u300b\u8fd9\u4e00\u7ae0\u4e2d\u63d0\u5230\u7684\u6302\u8f7d\u70b9\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u547d\u4ee4\u6267\u884c\u793a\u4f8b\u3002<br \/>\n\u5c06\u6302\u8f7d\u5230 \/mnt\/test\u3002<\/p>\n<pre class=\"post-pre\"><code>mount -t overlay overlay -o lowerdir=\"\/var\/lib\/docker\/overlay2\/1109be508e00968c34c73a5cd2c787ad6d3c4951f7b387700ace2b12daae8ec8-init\/diff:\/var\/lib\/docker\/overlay2\/35d8c38f712194bd9d57b9a433955c1141c1974c2b07bfb86b44bee0feb1f0d4\/diff:\/var\/lib\/docker\/overlay2\/018ec8b5d317fddd6fdb9634bf01d869bfd03f9122477a853317efb8d8ff2d86\/diff:\/var\/lib\/docker\/overlay2\/f7671e8be670d1ab91d5a63166374862d2c972448d7b1c4037cee15e1a7628da\/diff:\/var\/lib\/docker\/overlay2\/4fea42daa23e6120c2956ca1d2397d3829fdb8e9f03336ed2b4bd36c895fa53e\/diff:\/var\/lib\/docker\/overlay2\/a15984dba40e4afa1df1c5088b6d3a366e91c74c04ef9a19f7a9e061e6e59bea\/diff:\/var\/lib\/docker\/overlay2\/6f61ebd10ebd7fd6e07b0226b0ac71602d3152a8f9a09744c774998e3c0fdc47\/diff:\/var\/lib\/docker\/overlay2\/ae7ad5c9ce4f3051ad28d3fdc8270c8f7b2d11f63a1446156485e5aa1e9adb64\/diff:\/var\/lib\/docker\/overlay2\/8242e55feaed0c250e9919273671ff051b136853ce2b0e7cf4a499f68388e588\/diff:\/var\/lib\/docker\/overlay2\/fcfb7edf288d40aa1673e09955b1affc748561f5c4d55f01ea9dc3d4fdd418ab\/diff\",upperdir=\"\/var\/lib\/docker\/overlay2\/1109be508e00968c34c73a5cd2c787ad6d3c4951f7b387700ace2b12daae8ec8\/diff\",workdir= \"\/var\/lib\/docker\/overlay2\/1109be508e00968c34c73a5cd2c787ad6d3c4951f7b387700ace2b12daae8ec8\/work\" \/mnt\/test\r\n\r\n<\/code><\/pre>\n<p>\u6211\u4e0d\u60f3\u4e00\u904d\u53c8\u4e00\u904d\u5730\u590d\u5236\u7c98\u8d34\u76ee\u5f55\uff0c\u6240\u4ee5\u8ba9\u6211\u4eec\u5199\u4e00\u4e2a\u811a\u672c\u3002\u6216\u8005\uff0c\u628a\u5b83\u4eec\u6574\u7406\u6210\u50cf\u4e0b\u9762\u8fd9\u6837\u7684shell\u811a\u672c\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u66f4\u6e05\u6670\u5730\u6302\u8f7d\u4e86\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">#!\/bin\/sh<\/span>\r\n<span class=\"nv\">CONTAINERNAME<\/span><span class=\"o\">=<\/span>\u30b3\u30f3\u30c6\u30ca\u540d\r\n<span class=\"nv\">DOCKERHOST<\/span><span class=\"o\">=<\/span>unix:\/\/\/var\/run\/docker.sock<span class=\"o\">(<\/span>\u5404\u81ea\u3067\u78ba\u8a8d\u3059\u308b\u3053\u3068\uff09\r\n<span class=\"nv\">LOWERDIR<\/span><span class=\"o\">=<\/span><span class=\"sb\">`<\/span>docker <span class=\"nt\">-H<\/span> <span class=\"k\">${<\/span><span class=\"nv\">DOCKERHOST<\/span><span class=\"k\">}<\/span> inspect <span class=\"nt\">--format<\/span><span class=\"o\">=<\/span><span class=\"s1\">'{{ .GraphDriver.Data.LowerDir }}'<\/span> <span class=\"k\">${<\/span><span class=\"nv\">CONTAINERNAME<\/span><span class=\"k\">}<\/span><span class=\"sb\">`<\/span>\r\n<span class=\"nv\">UPPERDIR<\/span><span class=\"o\">=<\/span><span class=\"sb\">`<\/span>docker <span class=\"nt\">-H<\/span> <span class=\"k\">${<\/span><span class=\"nv\">DOCKERHOST<\/span><span class=\"k\">}<\/span> inspect <span class=\"nt\">--format<\/span><span class=\"o\">=<\/span><span class=\"s1\">'{{ .GraphDriver.Data.UpperDir}}'<\/span> <span class=\"k\">${<\/span><span class=\"nv\">CONTAINERNAME<\/span><span class=\"k\">}<\/span><span class=\"sb\">`<\/span>\r\n<span class=\"nv\">WORKDIR<\/span><span class=\"o\">=<\/span><span class=\"sb\">`<\/span>docker <span class=\"nt\">-H<\/span> <span class=\"k\">${<\/span><span class=\"nv\">DOCKERHOST<\/span><span class=\"k\">}<\/span> inspect <span class=\"nt\">--format<\/span><span class=\"o\">=<\/span><span class=\"s1\">'{{ .GraphDriver.Data.WorkDir}}'<\/span> <span class=\"k\">${<\/span><span class=\"nv\">CONTAINERNAME<\/span><span class=\"k\">}<\/span><span class=\"sb\">`<\/span>\r\n<span class=\"nv\">MOUNTPOINT<\/span><span class=\"o\">=<\/span>\/mnt\/test\r\n\r\n\r\n<span class=\"nb\">sudo <\/span>mount <span class=\"nt\">-t<\/span> overlay <span class=\"nt\">-o<\/span> <span class=\"nv\">lowerdir<\/span><span class=\"o\">=<\/span><span class=\"k\">${<\/span><span class=\"nv\">LOWERDIR<\/span><span class=\"k\">}<\/span>,upperdir<span class=\"o\">=<\/span><span class=\"k\">${<\/span><span class=\"nv\">UPPERDIR<\/span><span class=\"k\">}<\/span>,workdir<span class=\"o\">=<\/span><span class=\"k\">${<\/span><span class=\"nv\">WORKDIR<\/span><span class=\"k\">}<\/span> overlay <span class=\"k\">${<\/span><span class=\"nv\">MOUNTPOINT<\/span><span class=\"k\">}<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u6267\u884c\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code># umount \/mnt\/test\r\n# ls \/mnt\/test\r\n# .\/test.sh\r\n# ls \/mnt\/test\r\nbin  boot  dev  etc  home  lib  lib32  lib64  libx32  media  minecraft  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var\r\n<\/code><\/pre>\n<h2>\u53d6\u6d88\u6302\u8f7d\u5f88\u7b80\u5355\uff0c\u53ea\u9700\u6307\u5b9a\u6302\u8f7d\u70b9\u3002<\/p>\n<pre class=\"post-pre\"><code>umount \/mnt\/test\r\n<\/code><\/pre>\n<h1>\u603b\u7ed3\u8fc4\u4eca\u4e3a\u6b62\uff0cDocker\u5bb9\u5668\u5728\u542f\u52a8\u5931\u8d25\u65f6\uff0c\u6062\u590d\u8be5\u5bb9\u5668\u975e\u5e38\u56f0\u96be\u3002\u7136\u800c\uff0c\u4f7f\u7528\u8fd9\u79cd\u65b9\u6cd5\uff0c\u60a8\u53ef\u4ee5\u6267\u884c\u64cd\u4f5c\u800c\u4e0d\u53d7\u5bb9\u5668\u542f\u52a8\u72b6\u6001\u7684\u5f71\u54cd\u3002<br \/>\n\u56de\u5230MiRm\u7684\u5f00\u53d1&#8230;<\/p>\n<h1>\u8bb0\u4e8b\u672c<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Docker\u8d77\u52d5\u4e2d\u306bDocker\u5074\u3067\u306e\u30d5\u30a1\u30a4\u30eb\u7de8\u96c6\u306f\u30de\u30a6\u30f3\u30c8\u30dd\u30a4\u30f3\u30c8\u306b\u53cd\u6620\u3055\u308c\u307e\u3059<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">storage-opt\u306e\u30b3\u30f3\u30c6\u30ca\u6bce\u306e\u5bb9\u91cf\u5236\u9650\u306f\u30de\u30a6\u30f3\u30c8\u30dd\u30a4\u30f3\u30c8\u5185\u3067\u3082\u6a5f\u80fd\u3057\u3066\u3044\u307e\u3059<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Docker\u306e\u30aa\u30f3\u30aa\u30d5\u306f\u7121\u8996\u3057\u3066\u554f\u984c\u306a\u304f\u3001Docker\u5185\u306emerged\u3068\u540c\u4e00\u306e\u5185\u5bb9\u306b\u306a\u308a\u307e\u3059\u3002<\/ul>\n<h1>\u5f15\u8ff0\u4e00\u4e2a\u53e5\u5b50<br \/>\n\u4ee5\u4e0b\u662f\u5bf9\u6240\u63d0\u4f9b\u94fe\u63a5\u7684\u672c\u5730\u5316\u4e2d\u6587\u89e3\u91ca\uff1a<\/p>\n<p>1. https:\/\/github.com\/thomasweaver\/docker-scanner\/blob\/e822bd8873b7225ce5c46f38226d232ea94f8124\/scanner\/Scanner\/Mount.py<br \/>\nGitHub\u94fe\u63a5\u662f\u5173\u4e8edocker-scanner\u9879\u76ee\u4e2d\u7684Mount.py\u6587\u4ef6\u3002<\/p>\n<p>2. https:\/\/github.com\/b00kwrm\/tddd\/blob\/29edb508cf47c19872aa43a6b1558ad609205c69\/tools\/get-docker-fs.py<br \/>\nGitHub\u94fe\u63a5\u662f\u5173\u4e8etddd\u9879\u76ee\u4e2d\u7684get-docker-fs.py\u6587\u4ef6\u3002<\/p>\n<p>3. https:\/\/github.com\/att\/docker-forensics\/blob\/944db5600bc9e7126f1d20e10499b4724bce4740\/docker-mount.py<br \/>\nGitHub\u94fe\u63a5\u662f\u5173\u4e8edocker-forensics\u9879\u76ee\u4e2d\u7684docker-mount.py\u6587\u4ef6\u3002<\/p>\n<p>4. https:\/\/github.com\/docker-forensics-toolkit\/toolkit\/blob\/3fa4e46dbce7aef871ac2eec90caeed6cd921263\/src\/dof\/model\/container.py<br \/>\nGitHub\u94fe\u63a5\u662f\u5173\u4e8edocker-forensics-toolkit\u9879\u76ee\u4e2d\u7684container.py\u6587\u4ef6\u3002<\/p>\n<p>5. https:\/\/qiita.com\/awakia\/items\/af9b46c322905cdce1d7<br \/>\n\u8fd9\u4e2a\u94fe\u63a5\u662f\u4e00\u4e2aQiita\u4e0a\u7684\u6587\u7ae0\uff0c\u6807\u9898\u662f&#8221;af9b46c322905cdce1d7&#8243;\u3002<\/p>\n<p>6. https:\/\/qiita.com\/ryuichi1208\/items\/0bd0284dcf8a09299504<br \/>\n\u8fd9\u4e2a\u94fe\u63a5\u662f\u4e00\u4e2aQiita\u4e0a\u7684\u6587\u7ae0\uff0c\u6807\u9898\u662f&#8221;0bd0284dcf8a09299504&#8243;\u3002<\/p>\n<h1>\u8fd9\u7bc7\u6587\u7ae0\u770b\u8d77\u6765\u5f88\u6709\u8da3\u3002<\/p>\n<h1>\u6ce8\u91ca<\/p>\n<div>\n<p>\u4ee5\u4e0b\u662f\u539f\u59cb\u7f51\u5740\u7684\u4e2d\u6587\u91ca\u4e49\uff1a<\/p>\n<p>http:\/\/docs.docker.jp\/v1.9\/engine\/userguide\/storagedriver\/overlayfs-driver.html<\/p>\n<p>https:\/\/www.clear-code.com\/blog\/2015\/6\/15.html<\/p>\n<p>https:\/\/unix.stackexchange.com\/questions\/324515\/linux-filesystem-overlay-what-is-workdir-used-for-overlayfs<\/p>\n<p>https:\/\/wiki.archlinux.jp\/index.php\/Overlayfs<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u8981\u6982\u62ec\u5728 Docker \u5bb9\u5668\u5185\u64cd\u4f5c\u6587\u4ef6\uff0c\u901a\u5e38\u4f7f\u7528 docker exec \u8fd0\u884c bash\u3002\u4f46\u662f\uff0c\u53ea\u6709\u5f53\u5bb9\u5668\u6b63 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