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Continuous Restoreへの道
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kakerukaeru
December 12, 2014
Technology
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Continuous Restoreへの道
MySQL Casual Talks vol.7 でしゃべった奴
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Transcript
Continuous Restoreͷಓ
MySQLCasualͳͷʹ Casual͡Όͳͯ͘ࢮʹͦ ͏Ͱ͢
͍
who are you
͍Θͳ͕͔͚Δ @kakerukaeru ΏͱΓΠϯϑϥԂࣇʹ͋ AmebaεϚϗϓϥοτϑΥʔϜ໘ݟΔϚϯ Amebaը૾৴Ϛϯ ࠷ۙྑ͘৮ͬͯΔσʔλετΞCassandra ΦΤʔʔ!!!!ɹʊʊ_ ɹɹɹ ʊʊ_ʗɹɹ ʋ
ɹɹ ʗɹ ʗɹʗ˶ʋ| ɹɹ/ (ƅ)/ɹʗ /
about Cyberagent
game
pigg
blog
Community
MySQL͍ͬͺ͍ͬͯΔΑ
͍
agenda
• ܧଓతΓ͢ͱ͋ͬͯΈͨ • Ͳ͏࣮ݱ͔ͨ͠ • BackupϚσ • RestoreϚσ • ͏ͪΐͬͱߟ͑Δ
• ͬͯΈͨॴײ • ࠓޙ
ܧଓత Γ͢ͱ͋ͬͯΈͨ
Έͳ͞·
ෆ҆ʹͳͬͨ͜ͱ͋Γ ·ͤΜ͔
ྫ͑
SlaveશͰແݶ࠶ىಈ SlaveҰؾʹམ1 1 ͱ͋ΔDeleteจൃߦˠmysqldམͪΔˠmysqldsafeܦ༝Ͱ্͕ΔˠϨϓϦ࠶։ͰDeleteจൃߦˠmysqldམͪΔˠmysqldsafe(ry
͘͠
͓͔ͪΌΜ͕ ຊ൪DBͰDROP DATABASE2 2 ࡢຊʹ͋ͬͨࣄ݅
ͳ͍͔ (ʈТʈ) ⊃ɹ㱬
͋Δͱ͢Δ͡ΌΖʁ (ʈТʈ) ⊃ɹ㱬
ͦΜͳ͜ΜͳͰ
ʊਓਓਓਓਓਓʊ ʼɹ MySQL܈ɹʻ ʼɹ ಥવͷࢮ ɹʻ ʉY^Y^Y^Y^Yʉ
͜Μͳࣄ͋Ζ͏͔ͱ
ͬͯͯΑ͔ͬͨ BACKUP
Ͱ
͜Εຊʹrestoreग़དྷΔͷʁ
͠ग़དྷͳ͔ͬͨΒͲ͏͠Α͏ɾɾɾ
ΓϚελʔ͚ͩɾɾɾ
ՔಇதͷϚελʔ͔Β σʔλൈ͖ग़͢ࣄʹɾɾɾ
ࣦഊͨ͠ΒͲ͏͠Α
͜Μͳෆ҆ʹ·͞Εͳ͍ͨΊʹ
Backupͷਖ਼ੑʁͷ୲อΛ͓͖͍ͯͨ͠
ͰɺखͰຖճ֬ೝ͢Δͷɾɾɾ
ࣗಈԽͪ͠Ό͍ͳyo
Ͳ͏࣮ݱ͔ͨ͠
Backup·ͰͷྲྀΕ
None
Backup • backup༻slave • backup༻server • backup_serverΑΓ • ఆظxtrabackup •
ਵ࣌binlog_sync
ϦετΞ·ͰͷྲྀΕ
None
Restore • APIܦ༝Ͱinstance࡞ • chef-soloʹͯmysql_setup • BackupαʔόΑΓ࠷৽ͷsnapshotͱbinlogΛసૹ • test-serverͰrestoreॲཧ •
instanceআ
͜ΕͰRestoreͷ୲อ͕ग़དྷͨ
͍ͭͳΜͲ͖αʔό͕ࢮ ΜͰେৎ _(ˇωˇʯ㲃)_ ţźō…
͏ͪΐͬͱߟ͑Δ
ԿΛͬͯϦετΞྃͱ͢Δ͔
ۭͬΆͷςʔϒϧ͕ Restore͞Εͯҙຯͳ͍
ͳͷͰRestoreͷਖ਼ੑʁ ୲อͯ͋͛͠Α͏
Ͳ͜·ͰΔ͔
backup༻ͷSlaveͱ restore͞ΕͨDBͷ߹ੑΛߟ͑Δ
ͭ·Γʁ
BackupલͱRestoreޙͷ֬ೝ߲ʹ diff͕ͳ͍͜ͱΛ֬ೝ
֬ೝ߲ɺԿ͕͋Δ͔ͳʔ • ςʔϒϧഁଛ͕ͳ͍ࣄ • ςʔϒϧͷத͕Ұக͍ͯ͠Δ͜ͱ • ςʔϒϧఆ͕ٛҰக͍ͯ͠Δ͜ͱ • index͕Ұக͍ͯ͠Δ͜ͱ mysqlcheck
--all-databases CHECKSUM TABLE hogehoge SHOW CREATE TABLE hogehoge SHOW INDEXES FROM hogehoge
͜ΕΛ౿·্͑ͨͰcheckͷྲྀΕ
None
None
None
None
None
None
None
None
None
None
• stop Replication • pre_checksum • checksum table,show create table,show
indexes from • backup • start Replication • restore • diff pre_checksum • mysqlcheck
ͨͩ
ຖճ͜ͷchecksumΛྲྀ͢ͱ ͕͔͔࣌ؒΓ͗͢Δ
ͷͰ
࣮ࡍͷӡ༻Ͱ̎छྨʹ͚͍ͯ·͢
• ຖճ࣮ߦ • ςʔϒϧഁଛ͕ͳ͍ࣄ • िҰcheck • ςʔϒϧഁଛ͕ͳ͍ࣄ • ςʔϒϧͷத͕Ұக͍ͯ͠Δ͜ͱ
• ςʔϒϧఆ͕ٛҰக͍ͯ͠Δ͜ͱ • index͕Ұக͍ͯ͠Δ͜ͱ
͜ΕͰdataͷਖ਼ੑ ͋Δఔ୲อͰ͖͔ͨͳ
None
Θ͊ɺಈ͍ͯΔ ͭͳ͗ࠐΈͯ͠શମͰಈ͍ͨͷ͍͖ͭͬ͞
҆৺ͯ͠৸ΕΔ ( ˘ω˘ ) ţźō…
ͬͯΈͨॴײ
ਖ਼ࡢՔಇ࢝͠Ί͔͔ͨͬͩΒ·ͩײͳ͍ খཻͳͷ͔Βେཻͳͷ·Ͱ༷ʑͳαʔϏε͕ཚཱͯ͠Δঢ় گͰɺ̍αʔϏεͣͭrestoreग़དྷΔ͔ͷ֬ೝΛ৺Թ·Δख࡞ۀ Ͱ֬ೝ͠ͳͯ͘ྑ͘ͳͬͨͱ͍͏ਫ਼ਆతͳ҆Β͗Λಘͨɻ ͋ͱɺ͜Ε͙Β͍ͷ༰ྔͩͱRestoreʹͲΕ͙Β͍ͷ͕͔͔࣌ؒ Δ͔ͱ͔͕͔ͬͨΓͯͪ͠ΐͬͱָ͍͠
ࠓޙ
ෆ҆ɺվળ • check߲ͬͱ٧ΊΕΔؾ͕͢Δ • ϚαΧϦ͚Εخ͍͠Ͱ͢(;д) • ͿͬͪΌ͚·ͩ̏Service͙Β͍Ͱ͔͠Քಇͯ͠ͳ͍ • ͲΜͲΜՃ͍ͯ͘͠ •
·ͩ100GB͙Β͍·Ͱͷ༰ྔͷrestore͔ͯ͠͠ͳ͍ • ༰ྔ૿͖͑ͯͨΒࠓͷcheckͩͱऴΘΒͳ͍ؾͯ͠Δ
·ͱΊ
Backup୲อʹΑΓ
շదͳDBഁյϥΠϑΛʂ
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠