{"id":1097,"date":"2018-10-28T17:46:12","date_gmt":"2018-10-28T08:46:12","guid":{"rendered":"https:\/\/aoboshi.org\/?p=1097"},"modified":"2018-10-28T17:51:22","modified_gmt":"2018-10-28T08:51:22","slug":"gce%e4%b8%8a%e3%81%aelinux%e3%81%abswap%e3%82%92%e8%a8%ad%e5%ae%9a","status":"publish","type":"post","link":"https:\/\/aoboshi.org\/?p=1097","title":{"rendered":"GCE\u4e0a\u306eLinux\u306bswap\u3092\u8a2d\u5b9a"},"content":{"rendered":"

Stackdriver\u3092\u5165\u308c\u3066\u304b\u3089<\/a>\u3001oom-killer\u3067(\u8981\u306f\u30e1\u30e2\u30ea\u4e0d\u8db3\u3067)\u30ea\u30d6\u30fc\u30c8\u304c\u983b\u767a\u3059\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<\/p>\n

Syslog\u4e0a\u3067\u4e0b\u8a18\u306e\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u6bce\u65e5\u3067\u3066\u3044\u307e\u3059\u3002<\/p>\n

Oct 6 00:12:29 wordpress-1-vm kernel: [233585.430289] systemd invoked oom-killer<\/strong>: gfp_mask=0x201da, order=0, oom_score_adj=0
\nOct 6 00:12:29 wordpress-1-vm kernel: [233585.438280] systemd cpuset=\/ mems_allowed=0
\nOct 6 00:12:29 wordpress-1-vm kernel: [233585.443040] CPU: 0 PID: 1 Comm: systemd Not tainted 3.16.0-5-amd64 #1 Debian 3.16.51-3+deb8u1
\nOct 6 00:12:29 wordpress-1-vm kernel: [233585.451762] Hardware name: Google Google Compute Engine\/Google Compute Engine, BIOS Google 01\/01\/2011
\nOct 6 00:12:29 wordpress-1-vm kernel: [233585.461285] 0000000000000000 ffffffff8151f937 ffff8800243172d0 0000000000000000
\nOct 6 00:12:29 wordpress-1-vm kernel: [233585.469363] ffffffff8151d53e 0000000000000000 ffffffff810d9edf 0000000000000000
\nOct 6 00:12:29 wordpress-1-vm kernel: [233585.477435] ffffffff8152436e 0000000000000200 ffffffff8106a3c3 ffffffff810c7464
\nOct 6 00:12:29 wordpress-1-vm kernel: [233585.485565] Call Trace:
\nOct 6 00:12:29 wordpress-1-vm kernel: [233585.488215] [] ? dump_stack+0x5d\/0x78
\nOct 6 00:12:29 wordpress-1-vm kernel: [233585.493741] [] ? dump_header+0x76\/0x1e8<\/p>\n

Uptime Check\u3067\u983b\u7e41\u306b\u30a2\u30af\u30bb\u30b9\u304c\u3042\u308b\u306e\u304c\u539f\u56e0\u3068\u601d\u3044\u3001
\n\"\"<\/a><\/p>\n

\u524d\u56de<\/a>\u8a2d\u5b9a\u3057\u305f\u300cAlerting Policy\u300d\u3068\u300cUptime Check\u300d\u8a2d\u5b9a\u3092\u4e00\u65e6\u524a\u9664\u3001
\n\u300cCheck every\u300d\u306f\u300c5 minutes(\u524d\u56de\u306f1 minutes)\u300d\u3067\u518d\u8a2d\u5b9a\u3057\u305f\u3068\u3053\u308d\u3001CPU\u4f7f\u7528\u91cf\u304c\u3084\u3084\u4e0b\u304c\u308a\u307e\u3057\u305f\u304c\u3001<\/p>\n

Uptime Check 1min\u306e\u72b6\u614b
\n\"\"<\/a><\/p>\n

Uptime Check 5min\u306b\u5909\u66f4\u5f8c
\n\"\"<\/a><\/p>\n

\u30e1\u30e2\u30ea\u306f\u4f7f\u7528\u91cf\u306f\u4e0a\u306b\u5f35\u308a\u4ed8\u3044\u305f\u307e\u307e<\/strong>\u306a\u306e\u3067\u3001
\n\"\"<\/a><\/p>\n

\u305f\u3057\u304b\u306b\u5b9f\u30e1\u30e2\u30ea\u306fAlways free\u4e0a\u9650\u306e0.6GB\u3067\u5c11\u306a\u3044\u3051\u3069swap\u304c\u3042\u308b\u306f\u305a<\/strong>\u3060\u304b\u3089\u306a\u3042\u3068\u3001
\n\u78ba\u8a8d\u3057\u305f\u3068\u3053\u308d\u3001<\/p>\n

# free
\n total used free shared buffers cached
\nMem: 608604 559076 49528 35132 4932 75128
\n-\/+ buffers\/cache: 479016 129588
\nSwap: 0 0 0<\/strong><\/p>\n

swap\u304c\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/strong><\/p>\n

AWS\u3068\u304b\u3067\u3082\u305d\u3046\u3089\u3057\u3044\u306e\u3067\u3059\u304c\u3001\u30af\u30e9\u30a6\u30c9\u3063\u3066\u57fa\u672c\u7684\u306b\u300cswap\u3059\u308b\u306a\u3089\u4ee3\u308f\u308a\u306b\u3082\u3063\u3068\u5927\u304d\u3044\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f7f\u3048\u300d\u3068\u3044\u3046\u8003\u3048\u3089\u3057\u3044\u306e\u3067\u3001\u6a19\u6e96\u3067\u306fswap\u306f\u8a2d\u5b9a\u3055\u308c\u3066\u306a\u3044\u305d\u3046\u3067\u3059\u3002<\/p>\n

\u3067\u3082\u305d\u3046\u3082\u8a00\u3063\u3066\u3089\u308c\u306a\u3044\u306e\u3067\u3001swap\u306e\u8a2d\u5b9a\u3092\u5165\u308c\u3066\u307f\u307e\u3059\u3002
\nswap\u7528\u306e\u30d1\u30fc\u30c6\u30a3\u30b7\u30e7\u30f3\u306f\u306a\u3044\u306e\u3067\u3001swapfile\u3092\u4f5c\u3063\u3066\u305d\u3053\u306bswap\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002
\ndd\u3067swapfile\u306e\u5143\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002
\n\u3088\u304f\u300cswap\u306f\u5b9f\u30e1\u30e2\u30ea\u306e2\u500d\u300d\u306a\u3069\u3068\u805e\u304d\u307e\u3059\u304c\u3001\u5b9f\u30e1\u30e2\u30ea\u304c0.6GB\u3068\u5c11\u306a\u3044\u306e\u3067\u30012GB\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n

# dd if=\/dev\/zero of=\/swapfile bs=1M count=2048
\n2048+0 records in
\n2048+0 records out
\n2147483648 bytes (2.1 GB) copied, 57.2575 s, 37.5 MB\/s<\/p>\n

\u4e8b\u524d\u306e\u53d6\u308a\u308f\u3059\u308c\u3066\u307e\u3057\u305f\u304c\u3001swapfile\u4f5c\u6210\u5f8c\u3082\u3053\u308c\u304f\u3089\u3044\u30c7\u30a3\u30b9\u30af\u306b\u4f59\u88d5\u304c\u3042\u308c\u3070\u3001swap\u3057\u3066\u3082\u554f\u984c\u306a\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n

# df -h
\nFilesystem Size Used Avail Use% Mounted on
\n\/dev\/sda1 30G 5.9G 23G 21% \/
\nudev 10M 0 10M 0% \/dev
\ntmpfs 119M 13M 107M 11% \/run
\ntmpfs 298M 0 298M 0% \/dev\/shm
\ntmpfs 5.0M 0 5.0M 0% \/run\/lock
\ntmpfs 298M 0 298M 0% \/sys\/fs\/cgroup<\/p>\n

swapfile\u306f\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u304c600\u4ee5\u5916\u3060\u3068\u8b66\u544a\u304c\u51fa\u308b\u3089\u3057\u3044\u306e\u3067600\u306b\u3057\u307e\u3059\u3002<\/p>\n

# ls -l \/swapfile
\n-rw-r–r– 1 root root 2147483648 Oct 9 06:50 \/swapfile
\n# chmod 600 \/swapfile
\n# ls -l \/swapfile
\n-rw——- 1 root root 2147483648 Oct 9 06:50 \/swapfile<\/p>\n

mkswap\u30b3\u30de\u30f3\u30c9\u3067\u3001dd\u3067\u4f5c\u6210\u3057\u305f\u30d5\u30a1\u30a4\u30eb\u3092swapfile\u3068\u3057\u3066\u4f7f\u3048\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n

# mkswap \/swapfile
\nSetting up swapspace version 1, size = 2097148 KiB
\nno label, UUID=ebecbe3d-eed0-481c-91a3-68d047af03bb
\n#<\/p>\n

swapon\u30b3\u30de\u30f3\u30c9\u3067swapfile\u3092\u6307\u5b9a\u3057\u3066swap\u3092\u6709\u52b9\u306b\u3057\u307e\u3059\u3002<\/p>\n

# swapon \/swapfile<\/p>\n

swap\u304c\u6709\u52b9\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n

# free
\n total used free shared buffers cached
\nMem: 608604 559676 48928 35132 2412 66292
\n-\/+ buffers\/cache: 490972 117632
\nSwap: 2097148 0 2097148<\/strong><\/p>\n

\u7d9a\u3044\u3066\u3001\u518d\u8d77\u52d5\u3057\u305f\u5834\u5408\u3082\u81ea\u52d5\u3067swapfile\u304c\u30de\u30a6\u30f3\u30c8\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n

fstab\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\uff84\u3063\u3066\u3001<\/p>\n

# cp -ip fstab fstab_20181009
\n# ls -l fstab*
\n-rw-r–r– 1 root root 62 Apr 2 2018 fstab
\n-rw-r–r– 1 root root 62 Apr 2 2018 fstab_20181009<\/p>\n

vi\u3067\u958b\u3044\u3066\u4e0b\u8a18\u884c\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002
\n\u300c\/swapfile swap swap defaults 0 0\u300d<\/p>\n

# cat fstab
\nUUID=c75f01ee-4a1b-45ab-90d0-942e1e36393a \/ ext4 defaults 1 1
\n\/swapfile swap swap defaults 0 0<\/strong><\/p>\n

reboot\u3057\u3066\u3001swap\u304c\u8868\u793a\u3055\u308c\u308b\u3053\u3068\u3092\u3082\u3063\u3066\u3001\u8a8d\u8b58\u3055\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002
\n$ free
\n total used free shared buffers cached
\nMem: 608604 527896 80708 26944 20248 145768
\n-\/+ buffers\/cache: 361880 246724
\nSwap: 2097148 0 2097148<\/strong><\/p>\n

swap\u8a2d\u5b9a\u5f8c\u306f\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u4e0a\u306b\u5f35\u308a\u4ed8\u304f\u3053\u3068\u304c\u306a\u304f\u306a\u308a\u3001\u7121\u4e8b\u89e3\u6c7a\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Stackdriver\u3092\u5165\u308c\u3066\u304b\u3089\u3001oom-killer\u3067(\u8981\u306f\u30e1\u30e2\u30ea\u4e0d\u8db3\u3067)\u30ea\u30d6\u30fc\u30c8\u304c\u983b\u767a\u3059\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002 Syslog\u4e0a\u3067\u4e0b\u8a18\u306e\u3088\u3046\u306a\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u6bce\u65e5\u3067\u3066\u3044\u307e\u3059\u3002 Oct 6 00:12:29 word […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,4],"tags":[],"class_list":["post-1097","post","type-post","status-publish","format-standard","hentry","category-gcp","category-linux"],"_links":{"self":[{"href":"https:\/\/aoboshi.org\/index.php?rest_route=\/wp\/v2\/posts\/1097","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aoboshi.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aoboshi.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aoboshi.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aoboshi.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1097"}],"version-history":[{"count":0,"href":"https:\/\/aoboshi.org\/index.php?rest_route=\/wp\/v2\/posts\/1097\/revisions"}],"wp:attachment":[{"href":"https:\/\/aoboshi.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1097"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aoboshi.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1097"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aoboshi.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1097"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}