{"id":595,"date":"2021-06-30T10:47:16","date_gmt":"2021-06-30T02:47:16","guid":{"rendered":"https:\/\/julyclyde.org\/?p=595"},"modified":"2021-06-30T11:05:16","modified_gmt":"2021-06-30T03:05:16","slug":"%e6%bb%a5%e7%94%a8crond%e8%a7%a6%e5%8f%91systemd-login%e6%95%85%e9%9a%9c%e4%b8%80%e4%be%8b","status":"publish","type":"post","link":"https:\/\/julyclyde.org\/?p=595","title":{"rendered":"\u6ee5\u7528crond\u89e6\u53d1systemd-login\u6545\u969c\u4e00\u4f8b"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\u6545\u969c\u73b0\u8c61<\/h1>\n\n\n\n<p>2021\u5e741\u670820\u65e5\u63a5\u5230\u901a\u77e5\uff0c\u8981\u628asystemd\u5347\u7ea7\u5230219-73.tl2.10\u6216\u4ee5\u4e0a\u3001\u5e76\u628arsyslog\u4e00\u8d77\u5347\u7ea7\uff0c\u4ee5\u4fee\u590d\/var\/log\/messages\u65e0\u65e5\u5fd7\u5185\u5bb9\u7684bug\u3002\u7ecf\u5b9e\u9a8c\uff0c\u53d1\u73b0\u4f7f\u7528yum\u5347\u7ea7\u4e24\u4e2a\u8f6f\u4ef6\u5305\u4e4b\u540e\uff0csystemd-logind\u7684\u53ef\u6267\u884c\u6587\u4ef6\u4e5f\u88ab\u66f4\u65b0\uff0c\u5bfc\u81f4\u8be5\u670d\u52a1\u5904\u4e8e\u539f\u53ef\u6267\u884c\u6587\u4ef6\u5df2\u5220\u9664\u7684\u72b6\u6001\uff0c\u6240\u4ee5\u6211\u63d0\u8bae\uff0c\u5728\u5347\u7ea7\u6b65\u9aa4\u4e2d\u589e\u52a0\u91cd\u542fsystemd-logind\u670d\u52a1\u7684\u52a8\u4f5c\u3002\u5728Ansible playbook\u91cc\uff0c\u56e0\u4e3a\u4e0d\u80fd\u8868\u8fbe\u201c\u5927\u4e8e219-73.tl2.10\u201c\u8fd9\u79cd\u8303\u56f4\u578b\u7248\u672c\u53f7\uff0c\u6240\u4ee5\u5c31\u660e\u786e\u6307\u5b9asystemd\u7684\u7248\u672c\u4e3a\u5f53\u524dyum\u80fd\u81ea\u52a8\u5b89\u88c5\u5230\u7684\u6700\u65b0\u7248\u672c219-78.tl2.3<\/p>\n\n\n\n<p>2\u67081\u65e5\u7531\u540c\u4e8b\u6267\u884c\u66f4\u65b0\u64cd\u4f5c\u4e4b\u540e\uff0c\u5927\u90e8\u5206\u8282\u70b9\u90fd\u6b63\u5e38\u5de5\u4f5c\uff0c\u4f46\u6709\u4e24\u53f0\u53d1\u751f\u91cd\u542f\u4e8b\u6545\uff0c\u53e6\u6709\u4e00\u53f0\u4e0a\u7684 35777 systemd-login\u8fdb\u7a0b\u5360\u5185\u5b58\u9ad8\u8fbe4\uff5e6G\u3002\u8fd9\u4e09\u53f0\u6070\u597d\u662f\u4e00\u7ec4elasticsearch\u7684\u4e09\u53f0master\u8282\u70b9\uff0c\u5747\u4e3aC8\u673a\u578b\uff0c\u537316G\u5185\u5b58\u7684kubernetes\u5bb9\u5668\u3002<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1058\" height=\"129\" src=\"https:\/\/julyclyde.org\/wordpress\/wp-content\/uploads\/2021\/06\/WhDo3ATPIRrmZRDd.png\" alt=\"\" class=\"wp-image-605\"\/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">\u68c0\u67e5\u4fee\u590d<\/h1>\n\n\n\n<p>\u6211\u5c1d\u8bd5\u91cd\u542f\u5269\u4f59\u7684\u8fd9\u53f0\u7684system-logind\uff0c\u53d1\u73b0\u65b0\u8fdb\u7a0b3851\u53f7\u4ecd\u7136\u53606G\u5185\u5b58\u3002\u67e5\u770b\/proc\/3851\/smaps\uff0c\u8be5\u533a\u57df\u4e3aheap\uff1b\u7528pmap\u547d\u4ee4\u67e5\u770b\uff0c\u663e\u793a\u4e3a[ anon ]\u3002\u5bf9\u6bd4\u6b63\u5e38\u670d\u52a1\u5668\u7684\u540c\u4e00\u4e2a\u5185\u5b58\u533a\u57df\uff0c\u624d244K\u800c\u5df2\u3002<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"531\" height=\"1274\" src=\"https:\/\/julyclyde.org\/wordpress\/wp-content\/uploads\/2021\/06\/O0fVcWFDIGlcMfaR.png\" alt=\"\" class=\"wp-image-604\"\/><\/figure>\n\n\n\n<p><br>\u68c0\u67e5\u4e09\u53f0\u6545\u969c\u673a\u53ca\u5176\u5bbf\u4e3b\u673a\u7684\u65e5\u5fd7\uff0c\u53d1\u73b0\u5927\u91cfoom\u8bb0\u5f55\uff0c\u5176\u4e2d\u91cd\u542f\u7684\u4e24\u53f0\u6240\u5c5e\u5bbf\u4e3b\u673a\u7684kubelet\u4e5f\u53d1\u751f\u6545\u969c\u91cd\u542f\uff1a<br><code>Feb 1 18:43:50 TENCENT64 kubelet: panic: runtime error: invalid memory address or nil pointer dereference<\/code><\/p>\n\n\n\n<p>\u5148gcore\u4e00\u4efd\u4fdd\u7559\u6545\u969c\u73b0\u573a\u3002<br>\u7531\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u7ec4\u540c\u4e8b\u4e0d\u767b\u5f55\u4e0a\u6765\u89c2\u5bdf\uff0c\u4ec5\u63d0\u4f9b\u91cd\u542f\u8fdb\u7a0b\u7b49\u5efa\u8bae\uff0c\u6211\u53ea\u597d\u81ea\u5df1\u505a\u68c0\u67e5\u3002<br>\u6839\u636e\u5efa\u8bae\uff0c\u68c0\u67e5\u4e86dbus\u670d\u52a1\uff08dbus-daemon\u8fdb\u7a0b\uff09\uff0c\u53d1\u73b0\u4e5f\u662f\u53ef\u6267\u884c\u6587\u4ef6\u88ab\u5220\u9664\u7684\u72b6\u6001\u3002\u68c0\u67e5yum\u65e5\u5fd7\uff0c\u53d1\u73b0\u5728\u53bb\u5e746\u6708\u5347\u7ea7\u4e86dbus\u5305\uff0c\u4f46\u662f\u670d\u52a1\u8fdb\u7a0b\u662f3\u67085\u65e5\u542f\u52a8\u7684\uff0c\u4e5f\u5c31\u662f\u5347\u7ea7\u5305\u7684\u65f6\u5019\u5e76\u6ca1\u6709\u91cd\u542f\u8fd9\u4e2a\u670d\u52a1\u3002<br>\u518d\u6b21\u5c1d\u8bd5\u91cd\u542fsystemd-logind\uff0c\u65b0\u8fdb\u7a0b14278\u53f7\uff0c\u53d1\u73b0\u7528\u5185\u5b58VmPeak: 5270484 kB\uff1b\u4f46\u662f\u8fc7\u4e86\u4e00\u4f1a\u513f\u518d\u89c2\u5bdf\uff0c\u53d1\u73b0\u589e\u52a0\u5230\u4e86VmPeak: 6599828 kB\u3002\u8fd9\u8bf4\u660e\u5185\u5b58\u7684\u589e\u957f\u662f\u4e00\u4e2a\u8fc7\u7a0b\uff0c\u867d\u7136\u589e\u957f\u6bd4\u8f83\u5feb\uff0c\u4f46\u5e76\u4e0d\u662f\u4e00\u4e0b\u5b50\u5c316G\u7684\u3002\u4e8e\u662f\u6211\u51b3\u5b9astrace\u4e00\u4e0b\u5b83\u3002<\/p>\n\n\n\n<p>\u5148\u5173\u95edsystemd-logind\u670d\u52a1\u3002\u4f7f\u7528\u547d\u4ee4strace -ff -s 1000 -p 1\u6302\u5728systemd\u4e3b\u8fdb\u7a0b\u4e0a\u505a\u8ddf\u8e2a\uff0c\u5e76\u7528-o\u53c2\u6570\u628a\u591a\u4e2a\u8fdb\u7a0b\u7684\u8ddf\u8e2a\u8bb0\u5f55\u5206\u522b\u5199\u5728\u6587\u4ef6\u91cc\u3002\u7136\u540e\u542f\u52a8systemd-logind\u670d\u52a1\u3002\u8fd9\u6837\uff0cstrace\u53ef\u4ee5\u8ddf\u8e2a\u5230 1\u53f7\u8fdb\u7a0bclone+execv\u6267\u884csystemd-logind\u7684\u77ac\u95f4\uff0c\u4ee5\u53casystemd-login\u6700\u5f00\u5934\u7684\u884c\u4e3a\u3002<br>\u68c0\u67e5systemd-login\u7684strace\u8bb0\u5f55\uff0c\u53d1\u73b0\u5927\u91cf\u8bbf\u95ee \/run\/systemd\/session\/ \u76ee\u5f55\u4e0b\u9762\u6587\u4ef6\u7684\u52a8\u4f5c\u3002\u68c0\u67e5\u8be5\u76ee\u5f55\uff0c\u53d1\u73b0\u5927\u91cf\u6b8b\u7559\u6587\u4ef6\u3002<br>\u641c\u7d22\uff0c\u53d1\u73b0 https:\/\/www.jianshu.com\/p\/343a072e2521 \u3001https:\/\/github.com\/systemd\/systemd\/issues\/1961 \u7b49\u5185\u5bb9\uff0c\u9042\u51b3\u5b9a\u7528systemctl stop\u547d\u4ee4\u6e05\u7406\u8fd9\u4e9b\u6b8b\u7559\u7684session scope\u3002\u6e05\u7406\u4e4b\u540e\u518d\u91cd\u542fsystemd-logind\u670d\u52a1\uff0c\u6062\u590d\u6b63\u5e38\u3002<\/p>\n\n\n\n<p>\u4e3a\u4e86\u9a8c\u8bc1\u8fd9\u4e2a\u95ee\u9898\uff0c\u518d\u6b21\u62ff\u51fa\u4e4b\u524d\u7684gcore\uff0c\u67e5\u770b\u6307\u5b9a\u5730\u5740\uff0c\u53d1\u73b0\u5927\u90e8\u5206\u6570\u636e\u4e3a0\uff0c\u4e2a\u522b\u4f4d\u7f6e\u7a00\u7a00\u62c9\u62c9\u7684\u786e\u5b9e\u53d1\u73b0\u4e00\u4e9b\/run\/systemd\/session\/\u4e0b\u9762\u7684\u6587\u4ef6\u540d\u7b49\u5b57\u7b26\u4e32\uff0c\u4f46\u662f\u6d53\u5ea6\u6781\u4f4e\uff0c\u7f3a\u4e4f\u4f5c\u4e3a\u7ebf\u7d22\u7684\u4ef7\u503c\u3002<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"417\" height=\"162\" src=\"https:\/\/julyclyde.org\/wordpress\/wp-content\/uploads\/2021\/06\/dSlENrtNBxT9T5NE.png\" alt=\"\" class=\"wp-image-602\"\/><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">\u539f\u56e0\u5206\u6790<\/h1>\n\n\n\n<p>\u67e5\u770b\/run\/systemd\/session\/\u4e0b\u9762\u6b8b\u7559\u7684session\u6587\u4ef6\uff0c\u53d1\u73b0\u7edd\u5927\u90e8\u5206\u90fd\u6709SERVICE=crond\u8fd9\u4e00\u884c\u3002\u68c0\u67e5crontab\u53d1\u73b0\uff0c\u817e\u8baf\u5185\u90e8\u5e38\u7528\u7684\u5c71\u5be8\u542f\u52a8\u670d\u52a1\u548c\u5c71\u5be8\u770b\u5b88\u8fdb\u7a0b\u7684\u65b9\u5f0f\uff08\u5373\u5728cron\u91ccps\u67e5\u770b\uff0c\u5982\u679c\u8fdb\u7a0b\u6d88\u5931\u5c31\u518d\u6b21\u542f\u52a8\uff09\u5bfc\u81f4\u4e86elasticsearch\u7684java\u8fdb\u7a0b\u88ab\u8ba1\u5165user session\u3002\u5728219\u7248\u672csystemd\u7684logind.conf\u914d\u7f6e\u6587\u4ef6\u91cc\uff0cKillUserProcess\u9ed8\u8ba4\u503c\u4e3ano\uff08\u6ce8\u610fsystemd\u540e\u7eed\u67d0\u7248\u672c\u7684\u9ed8\u8ba4\u503c\u53d8\u6210\u4e86yes\uff01\uff01\uff01\uff09\uff0cman logind.conf\u6ca1\u591a\u8bf4\u4ec0\u4e48\uff0c\u4f46\u662f\u65b0\u7248\u672c\u7684man logind.conf\u8bf4\u8bbe\u7f6eKillUserProcess=no\u4f1a\u5bfc\u81f4 user session scope\u4fdd\u6301\u5728abandon\u72b6\u6001\uff0c\u5373\u6211\u4eec\u9047\u5230\u7684\u8fd9\u79cd\u75c7\u72b6\u3002<br>\u6240\u4ee5\uff0c\u5c71\u5be8\u7684\u770b\u5b88\u8fdb\u7a0b\u65b9\u5f0f\uff0c\u662f\u5bfc\u81f4\u672c\u6b21\u6545\u969c\u7684\u6839\u672c\u539f\u56e0\u3002\u8fd9\u79cd\u65b9\u5f0f\u4e0d\u4ec5\u5185\u90e8\uff0c\u8fde\u5bf9\u5916\u670d\u52a1\u7684\u817e\u8baf\u4e91\u4e5f\u6709\u7c7b\u4f3c\u95ee\u9898\uff1ahttps:\/\/www.jianshu.com\/p\/343a072e2521<\/p>\n\n\n\n<p>\u8fd9\u91cc\u6709\u4e00\u7bc7\u5173\u4e8e\u5173\u4e8ecgroup v1 empty notification\u5728\u5bb9\u5668\u5185\u5931\u7075\u7684\u90ae\u4ef6\uff0c\u63d0\u5230\u4e86session\u56de\u6536\u7684\u673a\u5236\uff1ahttps:\/\/listman.redhat.com\/archives\/libvir-list\/2014-November\/msg01090.html<\/p>\n\n\n\n<p>\u4f7f\u7528dbus-monitor\u548cstrace\u89c2\u5bdf\u7684\u65f6\u5019\uff0cdbus-monitor\u53ef\u4ee5\u89c2\u5bdf\u5230session scope\u7684UnitRemoved\u3001session\u7684SessionRemoved\u7b49\u4e8b\u4ef6\u5728dbus\u4e0a\u4f20\u8f93\uff1b\u4e0d\u8fc7\u6b64\u65f6\u6302\u4e0astrace\u53bb\u89c2\u5bdfsystemd-logind\u5374\u5f80\u5f80\u662f\u6b63\u5e38\u5de5\u4f5c\u7684\u72b6\u6001\u3002<br>\u5355\u72ec\u4f7f\u7528 dbus-monitor \u4f46\u4e0d\u7528strace\uff0c\u53d1\u73b0\u6b8b\u7559\u7684session\u540e\uff0c\u518d\u53bb\u67e5\u9605dbus-monitor\u7684\u8bb0\u5f55\uff0c\u53d1\u73b0\u5728SessionRemoved\u6d88\u606f\u4e4b\u540e\u51fa\u73b0\u7684<br>path=\/org\/freedesktop\/login1\/user\/_0; interface=org.freedesktop.DBus.Properties; member=PropertiesChanged<br>\u8fd9\u4e2a\u6d88\u606f\u7684\u6d88\u606f\u4f53\u7279\u522b\u5de8\u5927\uff0c\u5185\u542b\u8fd1\u516d\u767e\u4e2asession\u7684\u7f16\u53f7\uff0c\u5e94\u8be5\u662f\u5168\u91cf\u66f4\u65b0\u8be5\u7528\u6237\u4e0b\u5c5e\u7684session\u5217\u8868\uff0c\u800c\u4e0d\u662f\u5dee\u91cf\u66f4\u65b0\u3002\u6240\u4ee5\u6211\u8ba4\u4e3asession\u6b8b\u7559\u5176\u5b9e\u662f\u4e2a\u65e7\u6570\u636e\u7d2f\u79ef\u5bfc\u81f4\u7684systemd-logind\u7684\u6027\u80fd\u96ea\u5d29\u95ee\u9898\u3002<\/p>\n\n\n\n<p>\u6b64\u5916\uff0cdbus-monitor\u8fd8\u89c2\u5bdf\u5230PolicyKit \uff08polkit.service\uff09\u670d\u52a1\u542f\u52a8\u7684\u65f6\u5019\u4e5f\u6709\u5927\u91cf\u7684session\u4fe1\u606f\u5728dbus\u4e0a\u4f20\u8f93\uff0cpolkit\u670d\u52a1\u542f\u52a8\u540e\u8fdf\u8fdf\u4e0d\u80fd\u5c31\u7eea\u3002\u8fd9\u4e2a\u670d\u52a1\u5982\u4e0d\u5c31\u7eea\uff0c\u4f1a\u5bfc\u81f4systemctl\u91cd\u542f\u670d\u52a1\u7684\u52a8\u4f5c\u5931\u8d25\u3001reboot\u7b49\u547d\u4ee4\u4e5f\u53ef\u80fd\u5931\u8d25\uff08https:\/\/github.com\/systemd\/systemd\/blob\/main\/src\/systemctl\/systemctl-start-unit.c#L254 \u8c03\u7528polkit_agent_open_maybe()\u51fd\u6570\uff09\u3002\u8fd9\u6837\u5c31\u4ea7\u751f\u91cc\u4e00\u4e2a\u5faa\u73af\u4f9d\u8d56\uff1a\u6e05\u7406\u6b8b\u7559session\u9700\u8981systemctl\u547d\u4ee4\uff0csystemctl\u547d\u4ee4\u9700\u8981polkit\u6388\u6743\uff0c\u800cpolkit\u4e5f\u88ab\u6b8b\u7559\u7684session\u7ed9\u5bb3\u6b7b\u4e86\u65e0\u6cd5\u6b63\u5e38\u5de5\u4f5c\u3002\u5982\u679c\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\uff0c\u5c31\u53ea\u597d\u624b\u5de5\u5220\u9664session\u6587\u4ef6\uff0c\u6b8b\u7559\u4e00\u4e9b\u5176\u4ed6\u6570\u636e\u5728\u5185\u5b58\u91cc\uff08\u53c2\u8003https:\/\/github.com\/systemd\/systemd\/blob\/main\/src\/login\/logind-session.c#L745\uff09\u5e76\u501f\u52a9\u5916\u90e8\u673a\u5236\u8fdb\u884c\u6574\u673a\u91cd\u542f\u3002<\/p>\n\n\n\n<p>\u53e6\u5916\uff0c\u5728\u5927\u91cf\u6267\u884csystemctl stop session-XXX.scope\u7684\u65f6\u5019\uff0c\u4e5f\u4f1a\u7ed9systemd-logind\u5e26\u6765\u538b\u529b\uff0c\u56e0\u4e3a\u6bcf\u6b21\u5f00\u59cb\u6216\u8005\u7ed3\u675fsession\uff0c\u90fd\u4f1a\u628asession\u53f7\u7801\u5199\u5165UID\u5bf9\u5e94\u7684 \/run\/systemd\/users\/{uid} \u6587\u4ef6\u5185<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"635\" height=\"346\" src=\"https:\/\/julyclyde.org\/wordpress\/wp-content\/uploads\/2021\/06\/hJSbsmBnufTast47.png\" alt=\"\" class=\"wp-image-603\"\/><\/figure>\n\n\n\n<p><br>\u6bcf\u6b21\u53d8\u52a8\u90fd\u4f1a\u5bfc\u81f4\u8fd9\u4e2a\u6587\u4ef6\u5168\u91cf\u8986\u5199\uff0c\u4ee3\u4ef7\u4e5f\u662f\u5f88\u9ad8\u6602\u7684\u3002\u5728\u6b8b\u5b58\u7684session\u6781\u591a\u7684\u60c5\u51b5\u4e0b\uff0c\u5f88\u96be\u7f13\u8fc7\u52b2\u6765\u3002\u4f7f\u7528systemctl stop\u4fee\u590d\u7684\u8017\u65f6\u751a\u81f3\u4f1a\u8d85\u8fc7\u4f7f\u7528\u91cd\u542f\u65b9\u6cd5\u4fee\u590d\u7684\u8017\u65f6\u3002<br>\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014<br>\u53e6\u5916\u4e24\u53f0\u56e0\u4e3aoom\u6574\u673a\u91cd\u542f\uff0c \/run\/ \u662fsystemd\u7ba1\u7406\u7684tmpfs\uff0c\u91cd\u542f\u540e\u5185\u5bb9\u4e22\u5931\uff0c\u8eb2\u8fc7\u4e00\u52ab\u3002<\/p>\n\n\n\n<p>\u7ecf\u540c\u4e8b\u63d0\u9192\uff0c\u5728\u53e6\u4e00\u53f0\u670d\u52a1\u5668\u4e0a\u867d\u7136\u4e5f\u662f\u7528crond\u542f\u52a8\u540e\u53f0\u670d\u52a1\uff0c\u4f46\u662f\u5374\u6ca1\u6709\u53d1\u751f\u7c7b\u4f3c\u75c7\u72b6\u3002\u6211\u68c0\u67e5\u53d1\u73b0\uff0c\u8be5\u670d\u52a1\u5668\u4e0ajava\u8fdb\u7a0b\u6240\u5c5e\u7684cgroup\u662fsystem.slice\/crond.slice \uff0c\u7ee7\u800c\u53d1\u73b0\u5176\/etc\/pam.d\/password-auth\u6587\u4ef6\u88ab\u66ff\u6362\u8fc7\uff0c\u4ece\u4e00\u4e2a\u5305\u542bpam_systemd.so\u7684\u914d\u7f6e\u6587\u4ef6\uff0c\u53d8\u6210\u4e86\u6307\u5411password-auth-ldap\u6587\u4ef6\u7684\u7b26\u53f7\u94fe\u63a5\u3002\u56e0\u4e3acrond\u5728\u53d8\u6362\u6267\u884c\u8eab\u4efd\u7684\u65f6\u5019\u6ca1\u6709\u7ecf\u8fc7pam_systemd.so \u6240\u4ee5\u4e5f\u4e0d\u4f1a\u88absystemd-logind \u8bb0\u5f55\uff0c\u4e0d\u4ea7\u751fsession\uff0c\u4e5f\u81ea\u7136\u4e0d\u4f1a\u6709\u6b8b\u7559\u3002\u8fd9\u79cd\u66f4\u6539\u8bef\u6253\u8bef\u649e\u8ba9\u8fd9\u6279\u670d\u52a1\u5668\u8eb2\u8fc7\u4e00\u52ab\u3002\u4f46\u662f\u7531\u4e8e\u516c\u53f8\u5185\u8f6f\u4ef6\u5c71\u5be8\u7684\u5b89\u88c5\u65b9\u5f0f\uff0c\u5230\u5e95\u8c01\u6539\u4e86\u8fd9\u4e2a\u914d\u7f6e\u6587\u4ef6\u3001password-auth-ldap\u6587\u4ef6\u5c5e\u4e8e\u54ea\u4e2a\u8f6f\u4ef6\uff0c\u6211\u8d39\u4e86\u5f88\u5927\u52b2\u624d\u6253\u542c\u5230\u662f\u4e00\u4e2a\u5185\u90e8\u7528\u4e8e\u7ba1\u7406ssh\u767b\u5f55\u6743\u9650\u7684\u8f6f\u4ef6\u3002<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">\u89e6\u53d1\u6761\u4ef6\u603b\u7ed3<\/h1>\n\n\n\n<ol class=\"wp-block-list\"><li>\/etc\/pam.d\/crond\u9075\u5b88\u7cfb\u7edf\u9ed8\u8ba4\u503c\uff0c\u5373\uff1a\u5305\u542bpam_systemd.so\uff0c\u5c31\u4f1a\u628acrond\u4ea7\u751f\u7684\u5b50\u8fdb\u7a0b\u653e\u5230user session\u91cc\u53bb\u3002\u5177\u4f53\u5230\u817e\u8baf\u5185\u7684\u5177\u4f53\u60c5\u51b5\uff0c\u5982\u679c\u5b89\u88c5\u4e86\u90a3\u4e2assh\u767b\u5f55\u6743\u9650\u7ba1\u7406\u8f6f\u4ef6\uff0c\u5219\u53ef\u4fa5\u5e78\u8eb2\u8fc7\u4e00\u52ab\u3002<\/li><li>cron\u4efb\u52a1\u6bd4\u8f83\u9891\u7e41\u7684\u65f6\u5019\uff0c\u4f1a\u4ea7\u751f\u5927\u91cf\u7684Session\u65b0\u5efa\u548c\u9500\u6bc1\u6d88\u606f\uff0c\u4f34\u968f\u5168\u91cf\u66f4\u65b0\uff0c\u5bf9logind\u9020\u6210\u8f83\u5927\u538b\u529b\uff1b\u5728\u5176\u672a\u80fd\u5904\u7406\u5b8c\u6bd5\u7684\u65f6\u5019\u4e0b\u4e00\u6b21\u66f4\u65b0\u6570\u636e\u53c8\u6765\u4e86\uff0c\u9020\u6210\u7d2f\u79ef<\/li><\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">\u6539\u8fdb\u5efa\u8bae<\/h1>\n\n\n\n<ol class=\"wp-block-list\"><li>\u81ea\u7814\u8f6f\u4ef6\u5305\u4e5f\u5e94\u8be5\u505a\u6210RPM\u5305\uff0c\u5b9e\u73b0\u5b89\u88c5\u8fc7\u7a0b\u6807\u51c6\u5316\u3001\u6587\u4ef6\u53ef\u8ffd\u8e2a\uff08rpm &#8211;list\uff09\u53ef\u9a8c\u8bc1\uff08rpm &#8211;verify\uff09\uff0c\u53ef\u4ee5\u8ffd\u67e5\u54ea\u4e2a\u6587\u4ef6\u5c5e\u4e8e\u54ea\u4e2a\u8f6f\u4ef6\u5305\uff08rpm &#8211;query &#8211;file\uff09<\/li><li>\u670d\u52a1\u542f\u52a8\u5e94\u8be5\u6258\u7ba1\u7ed9systemd\u4f5c\u4e3aservice unit\uff0c\u7531systemd\u8d1f\u8d23\u8fdb\u7a0b\u7684\u542f\u52a8\u3001\u6545\u969c\u91cd\u542f\u548c\u5173\u95ed<\/li><li>\u5e94\u5f03\u7528\u5bb9\u5668\u4f5c\u4e3a\u670d\u52a1\u5668\u8fd9\u79cd\u505a\u6cd5\uff0c\u89c4\u907fcgroup v1 empty notification\u7684\u95ee\u9898<\/li><\/ol>\n\n\n\n<p>systemd\u7684\u597d\u5904\u6709\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>\u901a\u8fc7cgroup\u53ef\u4ee5\u77e5\u9053Which Service Owns Which Processes\uff0c\u786e\u4fdd\u5173\u95ed\u670d\u52a1\u65f6\u6ca1\u6709\u6cc4\u6f0f\u5b50\u8fdb\u7a0b\u8bf7\uff08\u53c2\u89c1\u300asupervisor\u6cc4\u6f0f\u8fdb\u7a0b\u6848\u4f8b\u5206\u6790\u300b\uff09\uff1b<\/li><li>\u901a\u8fc7SIGCHLD\u5b9e\u73b0\u4f4e\u4ee3\u4ef7\uff08\u65e0\u989d\u5916\u8fdb\u7a0bvs. bash+ps+grep+grep\uff09\u3001\u5b9e\u65f6\uff08vs. crond\u7684\u4e00\u5206\u949f\u7c92\u5ea6\uff09\u76d1\u6d4b\u8fdb\u7a0b\u5b58\u6d3b\u6027<\/li><li>\u901a\u8fc7service unit file\u7684\u58f0\u660e\u5f0f\u5199\u6cd5\uff0c\u4f7f\u670d\u52a1\u8131\u79bb\u7528\u6237\u7ea7\u8fd0\u884c\u73af\u5883\u3001\u8131\u79bbuser.slice\u3001system.slice\/sshd.service\u548csystem.slice\/crond.service\u7684cgroup\uff0c\u62e5\u6709\u81ea\u5df1\u72ec\u7acb\u5e72\u51c0\u7684\u542f\u52a8\u6761\u4ef6\uff0c\u907f\u514d\u53d7\u5230\u7528\u6237\u73af\u5883\u53d8\u91cf\u3001rlimit\u7b49\u8bbe\u7f6e\u7684\u5e72\u6270\u548c\u4f20\u67d3<\/li><\/ol>\n\n\n\n<p>\u9644\u6e05\u7406\u65b9\u6cd5\uff1a<br>\u5fc5\u987b\u5224\u65ad\u8fdb\u7a0b\u662f\u5426\u5b58\u5728\uff0c\u7136\u540e\u518d\u6e05\u7406\u6b8b\u7559\u7684session scope\uff0c\u5426\u5219\u4f1a\u8bef\u5173\u95ed\u8fdb\u7a0b\u3002\u6bd4\u5982\uff1a<br><code># grep name=systemd \/proc\/$(pidof java)\/cgroup 1:name=systemd:\/kubepods\/pod480ee9e9-5ec9-11ea-bf78-6c0b84d57dd5\/2b34cb158d5fa1db6f17d9099c3b5314f67223f6aeb71c3c6cedbafd84df0b24\/user.slice\/user-1002.slice\/session-47639512.scope<\/code><br>\u8fd9\u91ccjava\u8fdb\u7a0b\u7684cgroup\u662fsession-47639512.scope \uff0c\u5219\/run\/systemd\/sessions\/47639512 \u6587\u4ef6\u4e0d\u5e94\u8be5\u88ab\u5220\u9664\uff0c\u4e5f\u4e0d\u5e94\u8be5\u6267\u884c systemctl stop session-47639512.scope<\/p>\n\n\n\n<p>\u7136\u800c\uff0c\u4ecesession\u5165\u624b\uff0c\u63a8\u65ad\u5176\u4e0b\u5c5e\u8fdb\u7a0b\u662f\u6bd4\u8f83\u56f0\u96be\u7684\u3002<br>\u53ef\u4ee5\u7528\u4e0b\u5217\u547d\u4ee4\u5224\u65ad\uff0csession\u6587\u4ef6\u5b58\u5728\u4f46\u662fcgroup\u5df2\u7ecf\u6d88\u5931\u7684\u60c5\u51b5\uff0c\u4ee5\u53cacgroup\u5b58\u5728\u4f46\u662f\u5185\u90e8\u4e0d\u5305\u542b\u8fdb\u7a0b\u8fd9\u4e24\u79cd\u60c5\u51b5\uff0c\u7136\u540e\u8f93\u51fa\u5176\u8def\u5f84\u6216\u6267\u884csystemctl stop\u6e05\u7406\uff1a<br><code>cd \/sys\/fs\/cgroup\/systemd\/user.slice\/; find \/run\/systemd\/sessions -type f | xargs -n1 -i bash -c 'source {} 2&gt;\/dev\/null ; DIR=user-$(getent passwd $USER|cut -d: -f3).slice\/$SCOPE; ( test ! -d $DIR || test ! \"<\/code>cat $DIR\/tasks<code>\" )&amp;&amp; echo stop $SCOPE || echo keep $DIR'<\/code><\/p>\n\n\n\n<p>\u5982\u679c\u5728C8\u673a\u578b\u4e0a\u8fd0\u884c\uff0c\u4e0a\u8ff0cd\u7684\u8def\u5f84\u5e94\u53c2\u8003\/proc\/1\/cgroup\u7684\u5185\u5bb9\uff0c\u4fee\u6b63\u4e3a<br>`\/sys\/fs\/cgroup\/systemd\/kubepods\/pod{POD\u53f7}\/{\u5bb9\u5668\u53f7}\/user.slice\/<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6545\u969c\u73b0\u8c61 2021\u5e741\u670820\u65e5\u63a5\u5230\u901a\u77e5\uff0c\u8981\u628asystemd\u5347\u7ea7\u5230219-73.tl2.10\u6216\u4ee5\u4e0a\u3001\u5e76\u628arsyslog\u4e00\u8d77\u5347\u7ea7\uff0c\u4ee5\u4fee\u590d\/var\/log\/messages\u65e0\u65e5\u5fd7\u5185\u5bb9\u7684bug\u3002\u7ecf\u5b9e\u9a8c\uff0c\u53d1\u73b0\u4f7f\u7528yum\u5347\u7ea7\u4e24\u4e2a\u8f6f\u4ef6\u5305\u4e4b\u540e\uff0csystemd-logind\u7684\u53ef\u6267\u884c\u6587\u4ef6\u4e5f\u88ab\u66f4\u65b0\uff0c\u5bfc\u81f4\u8be5\u670d\u52a1\u5904\u4e8e\u539f\u53ef\u6267\u884c\u6587\u4ef6\u5df2\u5220\u9664\u7684\u72b6\u6001\uff0c\u6240\u4ee5\u6211\u63d0\u8bae\uff0c\u5728\u5347\u7ea7\u6b65\u9aa4\u4e2d\u589e\u52a0\u91cd\u542fsystemd-logind\u670d\u52a1\u7684\u52a8\u4f5c\u3002\u5728Ansible playbook\u91cc\uff0c\u56e0\u4e3a\u4e0d\u80fd\u8868\u8fbe\u201c\u5927\u4e8e219-73.tl2.10\u201c\u8fd9\u79cd\u8303\u56f4\u578b\u7248\u672c\u53f7\uff0c\u6240\u4ee5\u5c31\u660e\u786e\u6307\u5b9asystemd\u7684\u7248\u672c\u4e3a\u5f53\u524dyum\u80fd\u81ea\u52a8\u5b89\u88c5\u5230\u7684\u6700\u65b0\u7248\u672c219-78.tl2.3 2\u67081\u65e5\u7531\u540c\u4e8b\u6267\u884c\u66f4\u65b0\u64cd\u4f5c\u4e4b\u540e\uff0c\u5927\u90e8\u5206\u8282\u70b9\u90fd\u6b63\u5e38\u5de5\u4f5c\uff0c\u4f46\u6709\u4e24\u53f0\u53d1\u751f\u91cd\u542f\u4e8b\u6545\uff0c\u53e6\u6709\u4e00\u53f0\u4e0a\u7684 35777 systemd-login\u8fdb\u7a0b\u5360\u5185\u5b58\u9ad8\u8fbe4\uff5e6G\u3002\u8fd9\u4e09\u53f0\u6070\u597d\u662f\u4e00\u7ec4elasticsearch\u7684\u4e09\u53f0master\u8282\u70b9\uff0c\u5747\u4e3aC8\u673a\u578b\uff0c\u537316G\u5185\u5b58\u7684kubernetes\u5bb9\u5668\u3002 \u68c0\u67e5\u4fee\u590d \u6211\u5c1d\u8bd5\u91cd\u542f\u5269\u4f59\u7684\u8fd9\u53f0\u7684system-logind\uff0c\u53d1\u73b0\u65b0\u8fdb\u7a0b3851\u53f7\u4ecd\u7136\u53606G\u5185\u5b58\u3002\u67e5\u770b\/proc\/3851\/smaps\uff0c\u8be5\u533a\u57df\u4e3aheap\uff1b\u7528pmap\u547d\u4ee4\u67e5\u770b\uff0c\u663e\u793a\u4e3a[ anon ]\u3002\u5bf9\u6bd4\u6b63\u5e38\u670d\u52a1\u5668\u7684\u540c\u4e00\u4e2a\u5185\u5b58\u533a\u57df\uff0c\u624d244K\u800c\u5df2\u3002 \u68c0\u67e5\u4e09\u53f0\u6545\u969c\u673a\u53ca\u5176\u5bbf\u4e3b\u673a\u7684\u65e5\u5fd7\uff0c\u53d1\u73b0\u5927\u91cfoom\u8bb0\u5f55\uff0c\u5176\u4e2d\u91cd\u542f\u7684\u4e24\u53f0\u6240\u5c5e\u5bbf\u4e3b\u673a\u7684kubelet\u4e5f\u53d1\u751f\u6545\u969c\u91cd\u542f\uff1aFeb 1 18:43:50 TENCENT64 kubelet: panic: runtime error: invalid memory address or nil pointer dereference \u5148gcore\u4e00\u4efd\u4fdd\u7559\u6545\u969c\u73b0\u573a\u3002\u7531\u4e8e\u64cd\u4f5c\u7cfb\u7edf\u7ec4\u540c\u4e8b\u4e0d\u767b\u5f55\u4e0a\u6765\u89c2\u5bdf\uff0c\u4ec5\u63d0\u4f9b\u91cd\u542f\u8fdb\u7a0b\u7b49\u5efa\u8bae\uff0c\u6211\u53ea\u597d\u81ea\u5df1\u505a\u68c0\u67e5\u3002\u6839\u636e\u5efa\u8bae\uff0c\u68c0\u67e5\u4e86dbus\u670d\u52a1\uff08dbus-daemon\u8fdb\u7a0b\uff09\uff0c\u53d1\u73b0\u4e5f\u662f\u53ef\u6267\u884c\u6587\u4ef6\u88ab\u5220\u9664\u7684\u72b6\u6001\u3002\u68c0\u67e5yum\u65e5\u5fd7\uff0c\u53d1\u73b0\u5728\u53bb\u5e746\u6708\u5347\u7ea7\u4e86dbus\u5305\uff0c\u4f46\u662f\u670d\u52a1\u8fdb\u7a0b\u662f3\u67085\u65e5\u542f\u52a8\u7684\uff0c\u4e5f\u5c31\u662f\u5347\u7ea7\u5305\u7684\u65f6\u5019\u5e76\u6ca1\u6709\u91cd\u542f\u8fd9\u4e2a\u670d\u52a1\u3002\u518d\u6b21\u5c1d\u8bd5\u91cd\u542fsystemd-logind\uff0c\u65b0\u8fdb\u7a0b14278\u53f7\uff0c\u53d1\u73b0\u7528\u5185\u5b58VmPeak: 5270484 kB\uff1b\u4f46\u662f\u8fc7\u4e86\u4e00\u4f1a\u513f\u518d\u89c2\u5bdf\uff0c\u53d1\u73b0\u589e\u52a0\u5230\u4e86VmPeak: 6599828 kB\u3002\u8fd9\u8bf4\u660e\u5185\u5b58\u7684\u589e\u957f\u662f\u4e00\u4e2a\u8fc7\u7a0b\uff0c\u867d\u7136\u589e\u957f\u6bd4\u8f83\u5feb\uff0c\u4f46\u5e76\u4e0d\u662f\u4e00\u4e0b\u5b50\u5c316G\u7684\u3002\u4e8e\u662f\u6211\u51b3\u5b9astrace\u4e00\u4e0b\u5b83\u3002 \u5148\u5173\u95edsystemd-logind\u670d\u52a1\u3002\u4f7f\u7528\u547d\u4ee4strace -ff -s 1000 -p 1\u6302\u5728systemd\u4e3b\u8fdb\u7a0b\u4e0a\u505a\u8ddf\u8e2a\uff0c\u5e76\u7528-o\u53c2\u6570\u628a\u591a\u4e2a\u8fdb\u7a0b\u7684\u8ddf\u8e2a\u8bb0\u5f55\u5206\u522b\u5199\u5728\u6587\u4ef6\u91cc\u3002\u7136\u540e\u542f\u52a8systemd-logind\u670d\u52a1\u3002\u8fd9\u6837\uff0cstrace\u53ef\u4ee5\u8ddf\u8e2a\u5230 1\u53f7\u8fdb\u7a0bclone+execv\u6267\u884csystemd-logind\u7684\u77ac\u95f4\uff0c\u4ee5\u53casystemd-login\u6700\u5f00\u5934\u7684\u884c\u4e3a\u3002\u68c0\u67e5systemd-login\u7684strace\u8bb0\u5f55\uff0c\u53d1\u73b0\u5927\u91cf\u8bbf\u95ee \/run\/systemd\/session\/ \u76ee\u5f55\u4e0b\u9762\u6587\u4ef6\u7684\u52a8\u4f5c\u3002\u68c0\u67e5\u8be5\u76ee\u5f55\uff0c\u53d1\u73b0\u5927\u91cf\u6b8b\u7559\u6587\u4ef6\u3002\u641c\u7d22\uff0c\u53d1\u73b0 https:\/\/www.jianshu.com\/p\/343a072e2521 &hellip; <a href=\"https:\/\/julyclyde.org\/?p=595\">Continue reading <span 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