{"id":7443,"date":"2022-08-30T12:00:00","date_gmt":"2022-08-30T04:00:00","guid":{"rendered":"https:\/\/egonlin.com\/?p=7443"},"modified":"2024-05-22T15:22:02","modified_gmt":"2024-05-22T07:22:02","slug":"%e5%ae%b9%e5%99%a8%e5%ae%89%e5%85%a8","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=7443","title":{"rendered":"\u5bb9\u5668\u5b89\u5168"},"content":{"rendered":"

\u4e00 \u5bb9\u5668\u5b89\u5168\u4ecb\u7ecd<\/h1>\n

\u5bb9\u5668\u7684\u5b89\u5168\u6027\u5206\u4e3a\u4e24\u4e2a\u5c42\u9762<\/p>\n

\u4e00\u4e2a\u662f\u67b6\u6784\u5c42\u9762<\/p>\n

\u6bd4\u5982<\/p>\n

1\u3001\u5bb9\u5668\u4e0e\u5bbf\u4e3b\u673a\u5171\u4eablinux\u5185\u6838<\/p>\n

2\u3001\u7528Namespace\u9694\u79bb\u8d44\u6e90\u7684\u4f7f\u7528<\/p>\n

3\u3001\u901a\u8fc7shim\/runC\u7684\u65b9\u5f0f\u6765\u542f\u52a8\u5bb9\u5668<\/p>\n

\u4f46\u4f5c\u4e3a\u4f7f\u7528\u8005\uff0c\u67b6\u6784\u5c42\u9762\u7684\u4e1c\u897f\u6211\u4eec\u662f\u65e0\u6cd5\u66f4\u6539\u7684\uff0c\u60f3\u8981\u505a\u5230\u5bb9\u5668\u5b89\u5168\uff0c\u53ea\u80fd\u662f\u5728\u5bb9\u5668\u542f\u52a8\u65f6\u63a7\u5236\u5b83\u7684\u5185\u90e8\u6743\u9650<\/p>\n

\u5177\u4f53\u63a7\u5236\u4e3b\u5206\u4e3a\u4e24\u4e2a\u65b9\u9762<\/p>\n

1\u3001\u63a7\u5236\u5bb9\u5668\u7684capabilities<\/p>\n

2\u3001\u8ba9\u5bb9\u5668\u4ee5\u975eroot\u7528\u6237\u542f\u52a8<\/p>\n

\u4e8c linux capabilities<\/h1>\n

\u9ed8\u8ba4\u542f\u52a8\u5bb9\u5668\uff0c\u867d\u7136\u4f60\u770b\u5230\u7684\u662froot\u7528\u6237\uff0c\u4f46\u662f\u5f88\u591a\u64cd\u4f5c\u90fd\u6ca1\u6709\u6743\u9650\uff0c\u9664\u975e\u5f00\u542fprivileged\u624d\u7b97\u662f\u771f\u6b63\u7684root\u7528\u6237\u62e5\u6709\u6240\u6709\u6743\u9650\uff0c\u5982\u4e0bdocker run –name –privileged ….<\/p>\n

\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n

1\u3001dockerfile<\/p>\n

FROM centos:7 \r\n\r\nRUN yum install -y iptables<\/code><\/pre>\n
2\u3001\u5236\u4f5c\u955c\u50cf\u5e76\u4e14\u542f\u52a8\u5bb9\u5668<\/p>\n
[root@test04 ~]# docker build -t test_cap:v1.0 .\/\r\n\r\n[root@test04 ~]# docker container run -ti --rm --name test test_cap:v1.0 sh\r\nsh-4.2# iptables -L -n\r\n\u62a5\u9519\u6743\u9650\u9519\u8bef\uff1a Permission denied (you must be root)<\/code><\/pre>\n
3\u3001\u4f46\u662f\u6211\u4eec\u5728\u5bb9\u5668\u91cc\u67e5\u770b\u5f53\u524d\u7528\u6237\uff0c\u4f1a\u53d1\u73b0\u547d\u540d\u662froot\u7528\u6237\uff0c\u4e3a\u4f55\u4f1a\u6ca1\u6709\u6743\u9650\u5462\uff1f\uff1f\uff1f<\/p>\n
sh-4.2# whoami\r\nroot<\/code><\/pre>\n
\u4e3a\u4ec0\u4e48\uff1f<\/p>\n
\u5728linux\u5185\u68382.2\u4ee5\u524d\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u7684\u6743\u9650\u53ea\u6709root\u4e0e\u975eroot\u4e4b\u5206\uff0croot\u7528\u6237\u6c38\u8fdc\u4e00\u5207\u6743\u9650\uff0c\u975eroot\u7528\u6237\u4e0d\u80fd\u6267\u884c\u4efb\u4f55\u7279\u6743\u64cd\u4f5c\u3002\u4f46\u662f\u5f88\u591a\u65f6\u5019\uff0c\u6211\u4eec\u662f\u9700\u8981\u8ba9\u67d0\u4e00\u666e\u901a\u7528\u6237\u62e5\u6709\u4e00\u4e9b\u7279\u6743\u6743\u9650\u7684\u3002<\/p>\n
\u4e8e\u662f\u4ece2.2\u5185\u6838\u4e4b\u540e\uff0c\u8bde\u751flinux capablilities\uff0c Linux capabilities\u7684\u672c\u8d28 \u5c31\u662f\u628aLinux root \u7528\u6237\u539f\u6765\u6240\u6709\u7684\u7279\u6743\u505a\u4e86\u7ec6\u5316\uff0c\u53ef\u4ee5\u66f4\u52a0\u7ec6\u7c92\u5ea6\u5730\u7ed9\u8fdb\u7a0b\u8d4b\u4e88\u4e0d\u540c\u6743\u9650\u3002<\/p>\n
\u6ce8\u610f\uff1acapability\u4ee3\u8868\u7684\u662f\u7279\u6743\uff0c\u662f\u5bf9root\u8fd9\u4e2a\u7528\u7684\u7279\u6743\u8fdb\u884c\u4e86\u7ec6\u5316\uff0c\u800c\u4e0d\u662f\u666e\u901a\u6743\u9650\u3002<\/p>\n
\u5bf9\u4e8e\u4efb\u610f\u4e00\u4e2a\u8fdb\u7a0b\uff0c\u5728\u505a\u4efb\u610f\u4e00\u4e2a\u7279\u6743\u64cd\u4f5c\u65f6\uff0c\u53ea\u8981\u8d4b\u4e88\u5b83\u8fd9\u4e2a\u7279\u6743\u64cd\u4f5c\u5bf9\u5e94\u7684capability\u5373\u53ef\uff0c\u8fd9\u6837\u4f60\u6574\u4f53\u7684\u6743\u9650\u8fd8\u662f\u666e\u901a\u7528\u6237\u7684\uff0c\u4f46\u67d0\u4e9b\u7279\u6b8a\u64cd\u4f5c\u4f60\u4e5f\u6709\u60f3\u8981\u7684\u6743\u9650\u3002
\n\u6bd4\u5982\uff1a\u4f60\u5728\u67d0\u4e00\u4e2a\u8fdb\u7a0b\u91cc<\/p>\n
1\u3001\u6267\u884ciptables\u547d\u4ee4\uff0c\u90a3\u8be5\u8fdb\u7a0b\u5c31\u9700\u8981\u6709CAP_NET_ADMIN\u8fd9\u4e2acapability
\n2\u3001\u5982\u679c\u4f60\u8981mount\u4e00\u4e2a\u6587\u4ef6\u7cfb\u7edf\uff0c\u90a3\u4e48\u5bf9\u5e94\u7684\u8fdb\u7a0b\u5c31\u9700\u8981\u6709CAP_SYS_ADMIN\u8fd9\u4e2acapability\uff0c\uff08CAP_SYS_ADMIN\u8fd9\u4e2acapability\u91cc\u5141\u8bb8\u4e86\u5927\u91cf\u7684\u7279\u6743\u64cd\u4f5c\uff0c\u5305\u62ec\u6587\u4ef6\u7cfb\u7edf\u3001\u4ea4\u6362\u7a7a\u95f4\u3001\u8fd8\u6709\u5bf9\u5404\u79cd\u8bbe\u5907\u7684
\n\u64cd\u4f5c\uff0c\u4ee5\u53ca\u7cfb\u7edf\u8c03\u8bd5\u76f8\u5173\u7684\u8c03\u7528\u7b49\uff09<\/p>\n
\u5728\u5bbf\u4e3b\u673a\u4e0a\uff0c\u9ed8\u8ba4root\u7528\u6237\u62e5\u6709\u6240\u6709\u7684capability\uff0c\u666e\u901a\u7528\u6237\u6ca1\u6709\u4efb\u4f55capability\uff0c\u5982\u679c\u6211\u4eec\u53bb\u6389root\u7684\u67d0\u4e2acapability\uff0c\u5b83\u80af\u5b9a\u4e5f\u5c31\u7f3a\u5931\u4e86\u67d0\u4e2a\u7279\u6743\uff0c\u53ef\u4ee5\u505a\u4e00\u4e2a\u7b80\u5355\u7684\u6d4b\u8bd5<\/p>\n
\u5728\u7269\u7406\u673a\u4e0a\uff0c\u5bf9root\u7528\u6237\u542f\u52a8\u7684\u8fdb\u7a0b\uff0c\u624b\u52a8\u53bb\u6389CAP_NET_ADMIN\u8fd9\u4e2acapabilities\uff0c\u4f60\u4f1a\u53d1\u73b0\u5728\u8be5\u8fdb\u7a0b\u5185\u5c31\u662f\u65e0\u6cd5\u6267\u884ciptables\u64cd\u4f5c\u4e86\uff0c\u54ea\u6015\u4f60\u662froot\u7528\u6237\r\n\r\n# capsh --keep=1 --user=root --drop=cap_net_admin -- -c 'iptables -L;sleep 100'\r\n\u62a5\u9519\u6ca1\u6709\u6743\u9650\uff1aPerhaps iptables or your kernel needs to be upgraded.<\/code><\/pre>\n
\u4e09 \u63a7\u5236\u5bb9\u5668\u7684capability<\/h1>\n
\u6211\u4eec\u542f\u52a8\u5bb9\u5668\u65f6docker run –name –privileged ….\u6307\u5b9a\u4e86privileges\u7684\u53c2\u6570\uff0c\u5176\u5b9e\u5c31\u662f\u8ba9\u5bb9\u5668\u83b7\u53d6\u4e86\u6240\u6709\u7684capabilities<\/p>\n
\u5982\u679c\u5bb9\u5668\u6ca1\u6709\u4e00\u4e9b\u7279\u6743\uff0c\u5f88\u591a\u4eba\u4f1a\u76f4\u63a5\u6307\u5b9a–privileged\u53c2\u6570\u542f\u52a8\u5bb9\u5668\uff0c\u8fd9\u662f\u4e0d\u5408\u7406\u7684\uff0c\u8fd8\u662f\u5e94\u8be5\u7528capability\u6765\u8be6\u7ec6\u63a7\u5236\uff0c\u53ea\u8d4b\u4e88\u5bb9\u5668\u5b83\u60f3\u8981\u7684\u90a3\u4e00\u4e2a\u7279\u6743\u5c31\u597d<\/p>\n
\u90a3\u4e3a\u4f55\u5728\u7269\u7406\u673a\u4e0a\uff0c\u7528root\u7528\u6237\u6267\u884c\u4efb\u4f55\u64cd\u4f5c\u90fd\u53ef\u4ee5\uff0c\u4f46\u662f\u5230\u4e86\u5bb9\u5668\u91cc\uff0c\u540c\u6837\u662froot\u7528\u6237\uff0c\u4e00\u4e9b\u64cd\u4f5c\u5374\u53d7\u5230\u9650\u5236\u5462\uff1f\uff1f\uff1f<\/p>\n
1\u3001\u5728\u666e\u901a\u7684linux\u8282\u70b9\u4e0a\uff0c\u975eroot\u7528\u6237\u542f\u52a8\u7684\u8fdb\u7a0b\u9ed8\u8ba4\u5c31\u6ca1\u6709\u4efb\u4f55\u7684linux capabilities
\n2\u3001\u5728\u666e\u901a\u7684linux\u8282\u70b9\u4e0a\uff0croot\u7528\u6237\u542f\u52a8\u7684\u8fdb\u7a0b\u9ed8\u8ba4\u5c31\u5305\u542b\u4e86\u6240\u6709\u7684linux capabilities\uff0c\u800c\u5728\u5bb9\u5668\u5185\u53ef\u4e0d\u662f\u8fd9\u6837\uff0c\u5bb9\u5668\u5728\u542f\u52a8\u65f6\u9664\u975e\u4f60\u6307\u5b9a–privileged\u624d\u4f1a\u5305\u542b\u6240\u6709\uff0c\u5426\u5219\u5bb9\u5668\u8fdb\u7a0b\u91cc\u7684root\u9ed8\u8ba4\u53ea\u5305\u542b\u4e86\u4e00\u90e8\u5206linux capabilities<\/p>\n
# \u542f\u52a8\u5bb9\u5668\u67e5\u770b1\u53f7\u8fdb\u7a0bstatus\u91cc\u5173\u4e8ecap\u7684\u53c2\u6570\r\n[root@test04 bin]# docker container run -ti --rm --name test test_cap:v1.0 sh\r\nsh-4.2# cat \/proc\/1\/status |grep -i cap\r\nCapInh: 0000000000000000\r\nCapPrm: 00000000a80425fb\r\nCapEff: 00000000a80425fb\r\nCapBnd: 00000000a80425fb\r\nCapAmb: 0000000000000000<\/code><\/pre>\n
\u542f\u52a8\u5bb9\u5668\uff0c\u8d4b\u4e88cap_net_admin<\/p>\n
docker container run -ti --rm --cap-add NET_ADMIN --name test test_cap:v1.0 sh\r\n\r\n# \u6709\u6743\u9650\u6267\u884ciptables\u547d\u4ee4\r\nsh-4.2# iptables -L -n\r\nChain INPUT (policy ACCEPT)\r\ntarget     prot opt source               destination         \r\n\r\nChain FORWARD (policy ACCEPT)\r\ntarget     prot opt source               destination         \r\n\r\nChain OUTPUT (policy ACCEPT)\r\ntarget     prot opt source <\/code><\/pre>\n
\u56db \u8ba9\u5bb9\u5668\u4ee5\u975eroot\u7528\u6237\u542f\u52a8<\/h1>\n
4.1 \u4ee5root\u7528\u6237\u542f\u52a8\u5bb9\u5668\u7684\u5b89\u5168\u95ee\u9898<\/h2>\n
\u4e3a\u4f55\u8981\u8ba9\u7528\u6237\u4ee5\u975eroot\u8eab\u4efd\u8fd0\u884c\uff1f\u8fd9\u91cc\u9762\u6d89\u53ca\u5230\u5b89\u5168\u95ee\u9898!<\/p>\n
\u5982\u679c\u5bb9\u5668\u5185\u7684\u8fdb\u7a0b\u662f\u4ee5root\u7528\u6237\u542f\u52a8\u7684\uff0c\u5b83\u867d\u7136\u4e0e\u5bbf\u4e3b\u673a\u7684root\u7528\u6237\u4e0d\u540c\uff0c\u4f46\u4f9d\u7136\u6709\u6743\u9650\u4fee\u6539\u5bbf\u4e3b\u673a\u7684\u4e00\u4e9b\u6587\u4ef6\uff0c\u54ea\u6015\u8fd9\u4e9b\u6587\u4ef6\u662f000\u6743\u9650<\/p>\n
[root@xxx ~]# docker container run -ti --rm -v \/etc:\/etc --name test centos:7 sh\r\nsh-4.2# ls -l \/etc\/shadow\r\n---------- 1 root root 808 Aug 25 16:10 \/etc\/shadow\r\nsh-4.2# echo \"egon666\" >> \/etc\/shadow  \r\nsh-4.2# exit\r\nexit\r\n[root@xxx ~]# tail -1 \/etc\/shadow  # \u56de\u5230\u5bbf\u4e3b\u673a\u67e5\u770b\uff0c\u53d1\u73b0\u786e\u5b9e\u4fee\u6539\u4e86\r\negon666<\/code><\/pre>\n
\u4f60\u53ef\u80fd\u4f1a\u8bf4\uff0c\u6211\u4eec\u63a7\u5236\u4e0d\u628a\u5bbf\u4e3b\u673a\u7684\u5173\u952e\u76ee\u5f55\u6302\u8f7d\u7ed9\u5bb9\u5668\u4e0d\u5c31\u53ef\u4ee5\u4e86\u561b\uff0c\u786e\u5b9e\u662f\u8fd9\u6837\uff0c\u4f46\u662f\uff0c\u8fd9\u91cc\u9700\u8981\u5f3a\u8c03\u70b9\uff0c\u4f60\u5c31\u660e\u767d\u4e86<\/p>\n
1\u3001\u4e0a\u4f8b\u544a\u8bc9\u4e86\u4f60\uff0c\u5bb9\u5668\u5185\u7684root\u7528\u6237\u867d\u7136\u4e0d\u5b8c\u5168\u7b49\u540c\u4e0e\u5bbf\u4e3b\u673a\u7684root\u7528\u6237\uff0c\u4f46\u540c\u6837\u662f\u62e5\u6709\u4e00\u4e9b\u5371\u9669\u7684\u6743\u9650\u7684<\/p>\n
2\u3001\u5bb9\u5668\u4e0e\u5bbf\u4e3b\u673a\u662f\u5171\u4eab\u5185\u6838\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e00\u4e9b\u5173\u952e\u6570\u636e\u4f60\u4e0d\u6302\u8f7d\u7ed9\u5bb9\u5668\uff0c\u5bb9\u5668\u4e5f\u5728\u7528\u5bbf\u4e3b\u673a\u7684<\/p>\n
\u7efc\u54081\u4e0e2\uff0c\u4e00\u65e6\u5bb9\u5668\u5185\u7684\u5e94\u7528\u6709\u5b89\u5168\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u5c31\u4f1a\u987a\u7740\u8be5\u6f0f\u6d1e\u9003\u9038\u51fa\u5bb9\u5668\uff0c\u5bf9\u5bbf\u4e3b\u673a\u9020\u6210\u5371\u5bb3\uff0c\u8fd9\u5176\u5b9e\u5f88\u597d\u7406\u89e3\uff1a\u5bb9\u5668\u672c\u8eab\u5c31\u662f\u5bbf\u4e3b\u673a\u4e0a\u7684\u8fdb\u7a0b\uff0c\u8be5\u8fdb\u7a0b\u51fa\u73b0\u4e86\u5b89\u5168\u95ee\u9898\uff0c\u653b\u51fb\u8005\u5c31\u662f\u4f1a\u5229\u7528\u8be5\u8fdb\u7a0b\u7684\u6743\u9650<\/p>\n
\u90a3\u5982\u4f55\u89e3\u51b3\u5462\uff1f\u6709\u4ee5\u4e0b \u51e0\u79cd\u65b9\u6848<\/p>
<\/div>
\u67e5\u770b\u66f4\u591a<\/h2>
\u8054\u7cfb\u7ba1\u7406\u5458\u5fae\u4fe1tutu19192010\uff0c\u6ce8\u518c\u8d26\u53f7<\/p>\n<\/div>
<\/div>
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Register<\/a><\/div>
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<\/div>","protected":false},"excerpt":{"rendered":"
\u4e00 \u5bb9\u5668\u5b89\u5168\u4ecb\u7ecd \u5bb9\u5668\u7684\u5b89\u5168\u6027\u5206\u4e3a\u4e24\u4e2a\u5c42\u9762 \u4e00\u4e2a\u662f\u67b6\u6784\u5c42\u9762 \u6bd4\u5982 1\u3001\u5bb9\u5668\u4e0e\u5bbf\u4e3b\u673a\u5171\u4eablinux\u5185\u6838 2\u3001\u7528N […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[428,422],"tags":[],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/7443"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7443"}],"version-history":[{"count":2,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/7443\/revisions"}],"predecessor-version":[{"id":10913,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/7443\/revisions\/10913"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}