{"id":14459,"date":"2024-01-06T11:37:31","date_gmt":"2024-01-06T08:07:31","guid":{"rendered":"https:\/\/www.itpiran.net\/blog\/?p=14459"},"modified":"2024-01-06T11:37:31","modified_gmt":"2024-01-06T08:07:31","slug":"optimize-journalctl-to-save-server-disk-space-in-linux","status":"publish","type":"post","link":"https:\/\/www.itpiran.net\/blog\/ja\/tutorials\/optimize-journalctl-to-save-server-disk-space-in-linux\/","title":{"rendered":"journalctl \u3067 Linux \u30c7\u30a3\u30b9\u30af\u9818\u57df\u3092\u6700\u9069\u5316\u3059\u308b"},"content":{"rendered":"<h2 id=\"introduction\"><span id=\"%d9%85%d9%82%d8%af%d9%85%d9%87\">\u5c0e\u5165<\/span><\/h2>\n<p>\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\u306b\u3068\u3063\u3066\u3001\u30ed\u30b0\u7ba1\u7406\u306fLinux\u30b5\u30fc\u30d0\u30fc\u306e\u5065\u5168\u6027\u3068\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u7dad\u6301\u3059\u308b\u4e0a\u3067\u91cd\u8981\u306a\u8981\u7d20\u3067\u3059\u3002\u6700\u8fd1\u306eLinux\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3051\u308b\u4e3b\u8981\u306a\u30ed\u30b0\u30b7\u30b9\u30c6\u30e0\u306e\u4e00\u3064\u306f\u3001systemd\u306e\u30ed\u30b0\u30b5\u30d6\u30b7\u30b9\u30c6\u30e0\u3067\u3042\u308bjournactl\u3067\u3059\u3002\u30ed\u30b0\u306f\u6642\u9593\u306e\u7d4c\u904e\u3068\u3068\u3082\u306b\u84c4\u7a4d\u3055\u308c\u3001\u304b\u306a\u308a\u306e\u30c7\u30a3\u30b9\u30af\u5bb9\u91cf\u3092\u6d88\u8cbb\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u30c7\u30a3\u30b9\u30af\u304c\u3044\u3063\u3071\u3044\u306b\u306a\u308b\u3068\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001journalctl\u3092\u6700\u9069\u5316\u3057\u3066\u30b5\u30fc\u30d0\u30fc\u306e\u30c7\u30a3\u30b9\u30af\u5bb9\u91cf\u3092\u7bc0\u7d04\u3057\u306a\u304c\u3089\u3001\u30c8\u30e9\u30d6\u30eb\u30b7\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0\u3084\u76e3\u67fb\u306b\u5fc5\u8981\u306a\u30ed\u30b0\u60c5\u5831\u3092\u78ba\u5b9f\u306b\u4fdd\u6301\u3059\u308b\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002.<\/p>\n<p><strong>Journalctl \u3068 Systemd \u30b8\u30e3\u30fc\u30ca\u30ea\u30f3\u30b0\u306e\u7d39\u4ecb <\/strong><\/p>\n<p>\u6700\u9069\u5316\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3059\u308b\u524d\u306b\u3001journalctl\u3068systemd\u30b8\u30e3\u30fc\u30ca\u30ea\u30f3\u30b0\u306e\u57fa\u790e\u3092\u7406\u89e3\u3057\u3066\u304a\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002systemd\u30b8\u30e3\u30fc\u30ca\u30ea\u30f3\u30b0\u306f\u3001\u30ed\u30b0\u30c7\u30fc\u30bf\u3092\u69cb\u9020\u5316\u3055\u308c\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u5316\u3055\u308c\u305f\u5f62\u5f0f\u3067\u4fdd\u5b58\u3059\u308b\u30ed\u30b0\u30da\u30a2\u3067\u3059\u3002journalctl\u306f\u3001\u30b8\u30e3\u30fc\u30ca\u30eb\u3092\u64cd\u4f5c\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u30b3\u30fc\u30c9\u3068\u30b3\u30de\u30f3\u30c9\u3067\u3059\u3002.<\/p>\n<p>systemd \u30ed\u30b0\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u518d\u8d77\u52d5\u5f8c\u3082\u4fdd\u6301\u3055\u308c\u3001\u9069\u5207\u306a\u8a2d\u5b9a\u3092\u884c\u308f\u306a\u3044\u3068\u7121\u5236\u9650\u306b\u5897\u52a0\u3057\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u6700\u9069\u5316\u304c\u91cd\u8981\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>\n<h2 id=\"%d9%85%d8%b1%d8%ad%d9%84%d9%87-1-%d8%a7%d8%b1%d8%b2%db%8c%d8%a7%d8%a8%db%8c-%d8%a7%d8%b3%d8%aa%d9%81%d8%a7%d8%af%d9%87-%d8%a7%d8%b2-%d8%af%db%8c%d8%b3%da%a9-%d9%81%d8%b9%d9%84%db%8c-%d8%aa\">\u30b9\u30c6\u30c3\u30d71 \u2013 \u30b8\u30e3\u30fc\u30ca\u30eb\u30ec\u30dd\u30fc\u30c8\u3067\u73fe\u5728\u306e\u30c7\u30a3\u30b9\u30af\u4f7f\u7528\u91cf\u3092\u8a55\u4fa1\u3059\u308b<\/h2>\n<p>\u307e\u305a\u3001\u5b87\u5b99\u96d1\u8a8c\u306e\u30ec\u30dd\u30fc\u30c8\u3067\u73fe\u5728\u4f55\u304c\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u8a55\u4fa1\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<div class=\"gatsby-highlight\" data-language=\"bash\">\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>journalctl --disk-usage<\/code><\/pre>\n<\/div>\n<pre class=\"language-bash line-numbers\"><span style=\"font-family: Tahoma, 'Times New Roman', 'Bitstream Charter', Times, serif;\">\u3053\u306e\u30b3\u30de\u30f3\u30c9\u306f\u3001\u30b8\u30e3\u30fc\u30ca\u30eb \u30ec\u30dd\u30fc\u30c8\u306b\u3088\u3063\u3066\u6d88\u8cbb\u3055\u308c\u308b\u30c7\u30a3\u30b9\u30af\u9818\u57df\u306e\u5408\u8a08\u91cf\u3092\u793a\u3057\u307e\u3059\u3002.\r\n<\/span><\/pre>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>Archived and active journals take up 3.5G in the file system.<\/code><\/pre>\n<\/div>\n<\/div>\n<div data-language=\"bash\">\n<h2 id=\"%d9%82%d8%af%d9%85-%d8%af%d9%88%d9%85-%d8%aa%d9%86%d8%b8%db%8c%d9%85-systemd-journald\">\u30b9\u30c6\u30c3\u30d72 \u2013 Systemd-journald\u306e\u8a2d\u5b9a<\/h2>\n<\/div>\n<p>systemd\u30b8\u30e3\u30fc\u30ca\u30eb\u306f\u30d5\u30a1\u30a4\u30eb\u7d4c\u7531\u3067\u8a2d\u5b9a\u3055\u308c\u308b<span>\u00a0<\/span><code>\/etc\/systemd\/journald.conf<\/code>. \u30c7\u30a3\u30b9\u30af\u4f7f\u7528\u91cf\u3092\u6700\u9069\u5316\u3059\u308b\u306b\u306f\u3001\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u7de8\u96c6\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<div class=\"gatsby-highlight\" data-language=\"bash\">\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>sudo nano \/etc\/systemd\/journald.conf<\/code><\/pre>\n<\/div>\n<\/div>\n<p>\u8003\u616e\u3059\u3079\u304d\u91cd\u8981\u306a\u8a2d\u5b9a\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ul>\n<li><code>\u30b7\u30b9\u30c6\u30e0\u6700\u5927\u4f7f\u7528<\/code>: \u30ed\u30b0\u304c\u30c7\u30a3\u30b9\u30af\u4e0a\u3067\u4f7f\u7528\u3067\u304d\u308b\u6700\u5927\u5bb9\u91cf\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u3053\u306e\u4e0a\u9650\u306b\u9054\u3059\u308b\u3068\u3001\u53e4\u3044\u30ed\u30b0\u304c\u524a\u9664\u3055\u308c\u3001\u65b0\u3057\u3044\u30ed\u30b0\u306e\u305f\u3081\u306e\u30b9\u30da\u30fc\u30b9\u304c\u78ba\u4fdd\u3055\u308c\u307e\u3059\u3002.<\/li>\n<li><code>\u30b7\u30b9\u30c6\u30e0\u30ad\u30fc\u30d7\u30d5\u30ea\u30fc<\/code>: \u3053\u308c\u306b\u3088\u308a\u3001systemd \u306f\u5e38\u306b\u30c7\u30a3\u30b9\u30af\u4e0a\u306b\u4e00\u5b9a\u91cf\u306e\u7a7a\u304d\u9818\u57df\u3092\u6b8b\u3059\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002.<\/li>\n<li><code>\u6700\u5927\u4fdd\u6301\u79d2\u6570<\/code>: \u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u3092\u4fdd\u5b58\u3059\u308b\u6700\u5927\u6642\u9593\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u3053\u306e\u6642\u9593\u3092\u8d85\u3048\u305f\u30a8\u30f3\u30c8\u30ea\u306f\u524a\u9664\u3055\u308c\u307e\u3059\u3002.<\/li>\n<li><code>\u30de\u30c3\u30af\u30b9\u30d5\u30a1\u30a4\u30eb\u79d2<\/code>: \u65b0\u3057\u3044\u30b8\u30e3\u30fc\u30ca\u30eb \u30d5\u30a1\u30a4\u30eb\u304c\u958b\u59cb\u3055\u308c\u308b\u307e\u3067\u306e\u6700\u5927\u6642\u9593\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002.<\/li>\n<\/ul>\n<p>\u30b5\u30fc\u30d0\u30fc\u306e\u30c7\u30a3\u30b9\u30af\u5bb9\u91cf\u3068\u4fdd\u5b58\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u30ed\u30b0\u60c5\u5831\u306e\u91cf\u306b\u5fdc\u3058\u3066\u3001\u3053\u308c\u3089\u306e\u8a2d\u5b9a\u3092\u69cb\u6210\u3057\u307e\u3059\u3002\u4f8b:<\/p>\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>SystemMaxUse=500M\r\nSystemKeepFree=1G\r\nMaxRetentionSec=1month\r\nMaxFileSec=1week<\/code><\/pre>\n<\/div>\n<p>\u3053\u308c\u3089\u306e\u8a2d\u5b9a\u306b\u3088\u308a\u3001\u30ed\u30b0\u306f 500 MB \u306b\u5236\u9650\u3055\u308c\u3001\u5c11\u306a\u304f\u3068\u3082 1 GB \u306e\u30c7\u30a3\u30b9\u30af\u9818\u57df\u304c\u5e38\u306b\u7a7a\u3044\u3066\u3044\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u3001\u30ed\u30b0\u306f\u6700\u5927 1 \u304b\u6708\u9593\u4fdd\u6301\u3055\u308c\u3001\u6bce\u9031\u65b0\u3057\u3044\u30ed\u30b0 \u30d5\u30a1\u30a4\u30eb\u304c\u958b\u59cb\u3055\u308c\u307e\u3059\u3002.<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u3092\u7de8\u96c6\u3057\u305f\u3089\u3001\u5909\u66f4\u3092\u4fdd\u5b58\u3057\u3066\u30b5\u30fc\u30d3\u30b9\u3092\u518d\u8d77\u52d5\u3057\u307e\u3059\u3002<code>systemd-journald<\/code><span> \u76f4\u63a5\u76ee\u7684\u8a9e\u306e\u52a9\u8a5e<\/span> \u6253\u3061\u4e0a\u3052<span> .<\/span><\/p>\n<div class=\"gatsby-highlight\" data-language=\"bash\">\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>sudo systemctl restart systemd-journald<\/code><\/pre>\n<\/div>\n<\/div>\n<h2 id=\"step-3---manually-trimming-the-journal\"><span id=\"%d9%85%d8%b1%d8%ad%d9%84%d9%87-3-%d8%a8%d8%b1%d8%b4-%d8%af%d8%b3%d8%aa%db%8c-journal\">\u30b9\u30c6\u30c3\u30d73 \u2013 \u624b\u4f5c\u696d\u306b\u3088\u308b\u30b8\u30e3\u30fc\u30ca\u30eb\u30ab\u30c3\u30c8<\/span><\/h2>\n<p>\u30c7\u30a3\u30b9\u30af\u4f7f\u7528\u91cf\u3092\u3059\u3050\u306b\u524a\u6e1b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u30b8\u30e3\u30fc\u30ca\u30eb\u3092\u624b\u52d5\u3067\u5207\u308a\u6368\u3066\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u7279\u5b9a\u306e\u6642\u9593\u3088\u308a\u53e4\u3044\u30a8\u30f3\u30c8\u30ea\u3092\u524a\u9664\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<div class=\"gatsby-highlight\" data-language=\"bash\">\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>sudo journalctl --vacuum-time=1month<\/code><\/pre>\n<\/div>\n<\/div>\n<p>\u30b8\u30e3\u30fc\u30ca\u30eb \u30b5\u30a4\u30ba\u3092\u7279\u5b9a\u306e\u30b5\u30a4\u30ba\u306b\u5236\u9650\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<div class=\"gatsby-highlight\" data-language=\"bash\">\n<div class=\"hcb_wrap\" data-no-translation=\"\" data-no-auto-translation=\"\">\n<pre class=\"prism line-numbers lang-bash\" data-lang=\"Bash\"><code>sudo journalctl --vacuum-size=500M<\/code><\/pre>\n<\/div>\n<\/div>\n<p>\u3053\u308c\u3089\u306e\u30b3\u30de\u30f3\u30c9\u306f\u3001\u8a2d\u5b9a\u3057\u305f\u6642\u9593\u9593\u9694\u307e\u305f\u306f\u30b5\u30a4\u30ba\u5236\u9650\u3092\u5c0a\u91cd\u3059\u308b\u305f\u3081\u306b\u53e4\u3044\u30a8\u30f3\u30c8\u30ea\u3092\u524a\u9664\u3057\u307e\u3059\u3002.<\/p>\n<h2 id=\"step-4---setting-up-log-rotation\"><span id=\"%d9%85%d8%b1%d8%ad%d9%84%d9%87-4-%d8%aa%d9%86%d8%b8%db%8c%d9%85-%da%86%d8%b1%d8%ae%d8%b4-%da%af%d8%b2%d8%a7%d8%b1%d8%b4-log-rotation\">\u30b9\u30c6\u30c3\u30d74 \u2013 \u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b<\/span><\/h2>\n<p><code><\/code>\u305d\u306e\u9593 <code>systemd-journald<\/code> \u4ed6\u306e\u30ec\u30dd\u30fc\u30c8\u30b7\u30b9\u30c6\u30e0\u3068\u4f75\u7528\u3059\u308b\u5834\u5408\u3001\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\uff08config\uff09\u306b\u57fa\u3065\u3044\u3066\u30ec\u30dd\u30fc\u30c8\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002 <code>systemd-journald<\/code> \u8ffd\u52a0\u306e\u30ec\u30dd\u30fc\u30c8\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001 <code>\u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8<\/code> \u3053\u308c\u306f\u30b7\u30b9\u30c6\u30e0\u30ed\u30b0\u3092\u30ed\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u3001\u5727\u7e2e\u3057\u3001\u30e1\u30fc\u30eb\u3067\u9001\u4fe1\u3059\u308b\u30c4\u30fc\u30eb\u3067\u3059\u3002\u8a2d\u5b9a\u306f\u3001\u4ee5\u4e0b\u306e\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3092\u7de8\u96c6\u3059\u308b\u3053\u3068\u3067\u884c\u3048\u307e\u3059\u3002 <code>\/etc\/logrotate.conf<\/code> \u305d\u3057\u3066 <code>\/etc\/logrotate.d \u30ed\u30b0\u30ed\u30fc\u30c6\u30fc\u30c8 <\/code>\u8a2d\u5b9a\u3057\u307e\u3059\u3002.<\/p>\n<h2 id=\"conclusion\"><span id=\"%d9%86%d8%aa%db%8c%d8%ac%d9%87%da%af%db%8c%d8%b1%db%8c\">\u7d50\u8ad6<\/span><\/h2>\n<p>\u6700\u9069\u5316 <code>\u30b8\u30e3\u30fc\u30ca\u30ebctl<\/code> 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