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daemontools-kobanashi
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yudoufu
August 11, 2015
Technology
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daemontools-kobanashi
yudoufu
August 11, 2015
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Transcript
daemontoolsখ @yudoufu 2015/08/11 ෦ษڧձ ͓ͬ͞ΜͬΆ͍Λ͠·͢
daemontoolsͬͯͬͯ͠Δʁ • αʔϏεͷdaemonӬଓԽπʔϧͱͯ͠༗໊ • ͓ͬ͞ΜΈΜͳ͓ੈʹͳͬͯΔ • ࠷ۙsupervisord ൊ;͑ͨͶ
ͦͦdaemontoolsͱ • UNIX/LinuxͷαʔϏεཧπʔϧ܈ͷ૯শ • djb࡞ • qmail / tcpserverͷ࡞ऀͰ͋Δ •
http://cr.yp.to/daemontools.html
daemontoolsͷத • daemonӬଓԽπʔϧ (svscan/supervise) • daemontoolsͬͯݴ͏ͱී௨͜ΕΛࢦ͢ • ҆શͳϩάهπʔϧ (multilog) •
αʔϏε/daemonԽͷิॿɾศརπʔϧ • ࠓ͔͜͜ΒϐοΫΞοϓͯ͠հ
daemontoolsͷิॿπʔϧ܈ • ͍͍ͪͪ໘ͩΑͶɺΛ࣮ݱͯ͘͠ΕΔখ • ୯Ͱ͑Δͷ͕ଟͯ͘UNIXత
setlock % setlock -n /path/to/hoge.lock command • command࣮ߦલʹlockΛߦ͍ɺϓϩηεͷॏ ෳىಈΛ͍Ͱ͘ΕΔ •
-n: ॏෳىಈcommand࣮ߦͤͣଈऴྃ • -N: ॏෳىಈϩοΫͷղ์Λ࣮ͬͯߦ • cronͱΈ߹Θͤͯ͏ͱศར
setlock - ༻ྫ 00 * * * * setlock -n
/var/run/cron.lock hugeprocess.sh • ͍͢͝Ͱ͔͍ॲཧΛຖ࣌Δ߹ • ສ͕Ұ࣍ͷ࣮ߦ͕࣌ؒདྷͯɺ࣍ͷϓϩηε ࣮ߦ͞Εͣऴྃ͢Δ setlock: fatal: unable to lock /var/run/cron.lock: temporary failure
setlock - ༻ྫ 00 * * * * setlock -N
/var/run/cron.lock preprocess.sh 30 * * * * setlock -N /var/run/cron.lock postprocess.sh • લॲཧͷ݁ՌΛड͚ͯޙॲཧΛ࣮ߦ͍ͨ͠ɺ ͱ͍͏ͷΛຖ࣌Δ߹ͳͲ • ಉ͡lockϑΝΠϧͳΒίϚϯυ͕ҧͬͯॲཧ Λͬͯ͘ΕΔ
envdir % envdir /path/to/env command • ୈ1ҾͰࢦఆͨ͠σΟϨΫτϦͷϑΝΠϧ Λɺڥมͱͯ͠ઃఆͯ͘͠ΕΔ
envdir - ࣮ߦྫ % cat /tmp/env/IP 192.168.1.1 % cat /tmp/env/LOGDIR
/var/log/hoge % envdir /tmp/env env | egrep "(IP|LOGIDIR)" IP=192.168.1.1 LOGDIR=/var/log/hoge • dirͷϑΝΠϧ໊Λม໊ʹɺ༰Λvalueʹ • ڥมͱεΫϦϓτΛผཧ͘͢͠ͳΔ
envuidgid % envuidgid user command • envͷ UID / GIDʹୈ1ҾͷuserΛઃఆ
• ࣮ߦϢʔβʔΛม͑ΔΘ͚͡Όͳ͍ envuidgid www-data env |egrep "(GID|UID|USER)" USER=yudoufu GID=33 UID=33
setuidgid % setuidgid user command • ࣮ߦ࣌ݖݶΛߜΓ͍ͨ߹ʹ͏ • جຊతʹroot࣮ߦͷεΫϦϓτͰ͏ •
αϒάϧʔϓΛө͠ͳ͍ͷͰͨ·ʹਏ͍ • https://github.com/bruceg/daemontools- encore • ༗ࢤ͕ͨ͠Γͯ͠Δ
softlimit % softlimit [-p… n] command • commandʹରͯ͠Ϧιʔε੍ݶΛ͔͚ΒΕΔ • ϓϩηε͝ͱͷdataηάϝϯτ੍ݶ
• ಉҰUIDͰͷϓϩηε੍ݶ • etc…
༨ஊ • εϥΠυΛmd2keyΛͬͯ࡞ͬͯΈͨ • https://github.com/k0kubun/md2key • ίϚϯυͷhighlight͍͍ײ͡ • จͷܗͬͺΓਓ͕Կͱ͔͢Δ •
·ͩେࡶʹ͋ͯ͜Ήπʔϧɺͱ͍͏ײ͡
·ͱΊ • daemontoolsͷαϙʔτπʔϧ܈ؾ͕ޮ͍ ͯͯศར