CockroachDBって何 / What is CockroachDB

Mar 2, 2020 Fukuoka.go#15 でお話しした資料です。

Transcript

1. Fukuoka.go#15 with Kagoshima Gophers
   Tomohisa Oda / Mar 2, 2020
   What isCockroachDB
   

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2. Fukuoka.go#15 with Kagoshima Gophers
   @linyows
   blog: tomohisaoda.com
   affiliation: GMO pepabo, inc.
   

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3. Fukuoka.go#15 with Kagoshima Gophers
   Private Projects
   ΞϓϦέʔγϣϯࣗ਎͕ϦϙδτϦ͔Β࠷৽ͷίʔυΛݕ
   ஌ͯࣗ͠ಈͰσϓϩΠͱσϦόϦʔΛߦ͏πʔϧ
   MJOVYͷVTFS໊લղܾΛ(JU)VCͷ5FBNϝϯόʔ΍Ϧϙδτ
   ϦͷΞΫηεݖݶऀ͔Βߦ͏πʔϧ
   

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4. Fukuoka.go#15 with Kagoshima Gophers
   ͓࿳ͼ"CockroachDBίʔυϦʔσΟϯά"͸
   "CockroachDBͬͯԿ" ʹͳΓ·ͨ͠ɻ
   

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5. Fukuoka.go#15 with Kagoshima Gophers
   CockroachDBͱ͸
   

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6. Fukuoka.go#15 with Kagoshima Gophers
   ๏ ஍ཧత෼ࢄ42-σʔλϕʔε
   ๏ 3%#ͱ/P42-ͷਐԽܥͰ͋Δ/FX42-
   ๏ ࣗಈ'BJMPWFSͱࣗಈ3FQBJS
   ๏ .VMUJ"DUJWFͳՄ༻ੑ
   ๏ 1PTUHSF42-ޓ׵ͰطଘͷυϥΠό͕࢖༻Ͱ͖Δ
   CockroachDB
   

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7. Fukuoka.go#15 with Kagoshima Gophers
   

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8. Fukuoka.go#15 with Kagoshima Gophers
   Design
   ਫฏͷεέʔϥϏϦςΟ
   ๏ ࿦ཧతʹ͸ແݶʹ૿΍ͤΔ
   ๏ ΫΤϦ෼ࢄͰ୯ҰΫΤϦΛશମత
   εϧʔϓοτ޲্
   ߴ͍ੜଘੑ
   ๏ Ϛγϯ෼ࢄɺϥοΫ෼ࢄɺ஍ཧత
   ෼ࢄ
   ๏ ࣗݾम෮ɺࣗݾෛՙόϥϯγϯά
   ڧ͍Ұ؏ੑ
   ๏ ߹ҙϕʔεͷϨϓϦέʔγϣϯ
   ๏ "$*%ηϚϯςΟΫεΛຬͨ͢෼
   ࢄτϥϯβΫγϣϯ
   

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9. Fukuoka.go#15 with Kagoshima Gophers
   ๏ 42-*OUFSGBDF͕ͩத਎͸෼ࢄ,74UPSF -FWFM%#ͷϑΥʔΫ3PDLT%#
   
   ๏ ςʔϒϧΛ3BOHFͱ͍͏.#Ҏ಺ͷαΠζʹͨ͠୯ҐͰ෼ׂ
   ๏ 3BOHF͕ϨϓϦέʔγϣϯͷ୯ҐͰ/PEFؒͰ4IBSEJOH͢Δ
   ๏ ϨϓϦέʔγϣϯ͸3BGUΞϧΰϦζϜͰߦ͍ɺ5SJQMJDBUFEʢ̏ॏʣߦ͑Δ
   ๏ ϨϓϦΧͷ૯਺/'ͱ͢Δͱ࠷େ'ݸͷো֐ʹ଱͑Δ
   Architecture
   

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10. Fukuoka.go#15 with Kagoshima Gophers
    SQL
    Transactional
    Distribution
    Replication
    Storage
    Client
    Foo : ID = [1, 51] Foo : ID = [51, 103] …
    Table Foo
    Index
    FooIdx
    Table Bar …
    Node1 Node2 Node3 Node4
    64M
    Ranges
    Range
    Index
    64M
    

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11. Fukuoka.go#15 with Kagoshima Gophers
    CockroachDB͕΍ͬͯ͘ΕΔ͜ͱ
    

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12. Fukuoka.go#15 with Kagoshima Gophers
    ReplicasͷϦόϥϯγϯάۉҰԽ
    $MVTUFSʹ/PEFΛ৽͘͠௥Ճ͢Δ $PDLSPBDI%#͸3BOHFΛ഑ஔ͢Δ $PDLSPBDI%#͸$MVTUFSΛۉ౳ʹ͢Δ
    

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13. Fukuoka.go#15 with Kagoshima Gophers
    ReplicasͷϦόϥϯγϯάम෮
    ো֐͕ൃੜ͠/PEFΛফࣦ͢Δ
    $PDLSPBDI%#͸3FQMJDBͷܽམΛೝࣝͯ͠
    "DUJWF/PEF্ʹϨϓϦΧΛஔ͖׵͑Δ
    ো֐͕Ұ࣌తͰ/PEF͕෮ؼͨ͠Β
    -FBTIPMEFSͱݺ͹ΕΔ3BGU-FBEFS͕
    ϨϓϦΧΛΩϟονΞοϓ͢Δ
    

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14. Fukuoka.go#15 with Kagoshima Gophers
    ๏ 51$$ϕϯνϚʔΫʹ͓͍ͯ"NB[PO"VSPSB
    ͱൺֱ͢Δͱഒͷεϧʔϓοτ͕͋Δ
    ๏ ͜ͷεϧʔϓοτ͸51$$ϥϯΩϯάͰ൪
    ໨ʹେ͖͍
    ๏ ,7 SFBE XSJUF
    Ͱ/PEF਺ͷ૿Ճʹ
    ΑͬͯτϥϯβΫγϣϯͷॲཧೳྗ͕ઢܗʹ
    ޲্͍ͯ͘͜͠ͱ͕Θ͔͍ͬͯΔ
    ๏ $PDLSPBDI%#ʹ͸ཧ࿦্ͷεέʔϦϯά੍
    ݶ͸ͳ͍ͱͷ͜ͱ
    Performance
    

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15. Fukuoka.go#15 with Kagoshima Gophers
    CockroachDBͷ࣮૷
    

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16. Fukuoka.go#15 with Kagoshima Gophers
    ๏ (P Ҏ্͸ඇਪ঑
    
    ๏ $DPNQJMFS͕ඞཁ 3PDLT%#΍$SZQUPɺ,FSCFSPTɺ4OBQQZͳͲʹґଘ
    
    ๏ (Pͷσ
    ΟϨΫτϦߏ੒͸ࢸͬͯී௨QLHʹ࣮૷͕͋Δ
    ๏ ֎෦QLH͸ఔͳͷͰن໛తʹґଘ͕গͳ͍Α͏ʹݟ͑Δ
    https://github.com/cockroachdb/cockroach
    ࣮૷ʹ͍ͭͯ
    $ tree pkg | grep .go | grep -v test.go | wc -l
    2405 // ͜ͷϑΝΠϧ਺ͰίʔυϦʔσΟϯά͢Δؾ͕ͳ͘ͳͬͨ
    $ grep 'name =' Gopkg.toml | grep -v golang | grep -v cockroach | wc -l
    20
    

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17. Fukuoka.go#15 with Kagoshima Gophers
    CockroachDBΛ͞ΘͬͯΈΔ
    

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18. Fukuoka.go#15 with Kagoshima Gophers
    ๏ IFMNͰ$PDLSPBDI%#ΫϥελΛ࡞੒ 4UBUFGVM4FUͷͭͷ1PE͕ىಈ
    
    helm install my-release --values my-values.yaml stable/cockroachdb
    kubectl get csr
    ๏ $PDLSPBDI%#ϊʔυͷূ໌ॻʹॺ໊͢ΔͨΊͷ$43Λঝೝ
    kubectl certificate approve default.node.my-release-cockroachdb-0
    kubectl certificate approve default.client.root
    kubectl get pv
    ๏ #VJMUJO$MJFOUͷ४උ
    kubectl create -f client-secure.yaml
    kubectl exec -it cockroachdb-client-secure -- ./cockroach sql --certs-dir=/cockroach-certs —host=my-release-cockroachdb-public
    https://www.cockroachlabs.com/docs/stable/orchestrate-a-local-cluster-with-kubernetes.html
    KubernetesΛ࢖ͬͯDemo: ४උ
    

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19. Fukuoka.go#15 with Kagoshima Gophers
    ๏ 42-ͷ࣮ߦ
    CREATE DATABASE bank;
    CREATE TABLE bank.accounts (id INT PRIMARY KEY, balance DECIMAL);
    INSERT INTO bank.accounts VALUES (1, 1000.50);
    SELECT * FROM bank.accounts;
    CREATE USER roach WITH PASSWORD 'Q7gc8rEdS';
    INSERT INTO system.role_members (role, member, "isAdmin") VALUES ('admin', 'roach', true);
    ๏ ίϯιʔϧϩάΠϯ
    kubectl port-forward my-release-cockroachdb-0 8080
    ๏ /PEF'BJMPWFSɺ/PEFͷ௥Ճɺ࡟আ
    kubectl delete pod my-release-cockroachdb-2
    helm upgrade my-release stable/cockroachdb --set statefulset.replicas=4 —reuse-values
    kubectl certificate approve default.node.my-release-cockroachdb-3
    kubectl exec -it cockroachdb-client-secure -- ./cockroach node status --certs-dir=/cockroach-certs —host=my-release-cockroachdb-public
    kubectl exec -it cockroachdb-client-secure -- ./cockroach node decommission 2 --certs-dir=/cockroach-certs —host=my-release-cockroachdb-public
    helm upgrade my-release stable/cockroachdb --set statefulset.replicas=3 --reuse-values
    https://www.cockroachlabs.com/docs/stable/orchestrate-a-local-cluster-with-kubernetes.html
    KubernetesΛ࢖ͬͯDemo: ૢ࡞
    

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20. Fukuoka.go#15 with Kagoshima Gophers
    add node to cluster
    delete a pod
    

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21. Fukuoka.go#15 with Kagoshima Gophers
    ๏ IUUQTHJUIVCDPNDPDLSPBDIECDPDLSPBDICMPCNBTUFSEPDTEFTJHONE
    ๏ IUUQTXXXDPDLSPBDIMBCTDPNEPDTTUBCMFBSDIJUFDUVSFPWFSWJFXIUNM
    ๏ IUUQTXXXDPDLSPBDIMBCTDPNEPDTTUBCMFDPDLSPBDIECJODPNQBSJTPOIUNM
    ๏ IUUQTXXXDPDLSPBDIMBCTDPNEPDTTUBCMFNVMUJBDUJWFBWBJMBCJMJUZIUNM
    ๏ IUUQTXXXDPDLSPBDIMBCTDPNCMPHMJNJUTPGUIFDBQUIFPSFN
    ๏ IUUQTXXXJOGPRDPNQSFTFOUBUJPOTDPDLSPBDIECEJTUSJCVUFETRM
    ๏ IUUQTXXXDPDLSPBDIMBCTDPNCMPHUQDDL
    ๏ IUUQTXXXDPDLSPBDIMBCTDPNEPDTTUBCMFPSDIFTUSBUFBMPDBMDMVTUFSXJUILVCFSOFUFTIUNM
    References
    

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22. Fukuoka.go#15 with Kagoshima Gophers
    Thank youaʕ⊙౪⚆ʔ
    

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