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マネージドクラウドとCの世界

sonod
May 23, 2018

 マネージドクラウドとCの世界

HashiCorp社のConsulとマネージドクラウドのお話

sonod

May 23, 2018
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  3. { "service": { { “name”: “keepalived”, “tags”: [“keepalived”], “checks”: [

    { "script”: "/usr/lib/nagios/plugins/check_procs -c 1: -a keepalived”, “interval”: "30s” } ] } } 8IBUJT$POTVM ˝LFFQBMJWFEKTPO ͜Μͳײ͡Ͱɺ+40/Ͱ$POTVMʹαʔϏεΛఆٛ͢Δͱ 
  4. # consul catalog services keepalived # dig keepalived.service.consul ;; ANSWER

    SECTION: keepalived.service.consul. 0 IN A 172.16.1.1 # curl http://127.0.0.1:8500/v1/catalog/services | jq. { "weblb-keepalived": [ "weblb-keepalived" ] } 8IBUJT$POTVM $POTVMΫϥΠΞϯτ΍%/4΍)551͔Β؆୯ʹಛఆͷαʔϏεΛݟ͚ͭΕΔΑ͏ʹͳΓ·͢ 
  5. { "service": { { “name”: “keepalived”, “tags”: [“keepalived”], “checks”: [

    { "script”: "/usr/lib/nagios/plugins/check_procs -c 1: -a keepalived”, “interval”: "30s” } ] } } 8IBUJT$POTVM ˝LFFQBMJWFEKTPO ͜Μͳײ͡Ͱɺ+40/Ͱ$POTVMʹαʔϏεΛఆٛ͢Δͱ  ͪͳΈʹ͜ͷϑΝΠϧͰ͕͢
  6. # consul agent -data-dir=/etc/consul # cat /etc/consul/keepalived.json { "service": {

    { “name”: “keepalived”, “tags”: [“keepalived”], “checks”: [ { "script”: "/usr/lib/nagios/plugins/check_procs -c 1: -a keepalived”, “interval”: "30s” } ] } } 8IBUJT$POTVM $POTVMBHFOUΛىಈ͢Δࡍʹࢦఆͨ͠σΟϨΫτϦʹ഑ஔ͠·͢  ͜ͷσΟϨΫτϦʹ഑ஔ
  7. { "service": { { “name”: “keepalived”, “tags”: [“keepalived”], “checks”: [

    { "script”: "/usr/lib/nagios/plugins/check_procs -c 1: -a keepalived”, “interval”: "30s” } ] } } 8IBUJT$POTVM ˝LFFQBMJWFEKTPO ઌఔɺʮ4FSWJDF%JTDPWFSZʯͰ࢖ͬͨ+40/ͷ࿮ઢͰׅހͬͨ෦෼ͷΑ͏ʹॻ͘͜ͱͰ࢖༻Ͱ͖·͢ ͜Ε͸/BHJPTϓϥάΠϯΛ࢖༻͍ͯ͠ΔύλʔϯʹͳΓ·͢ɻ 
  8. #BTJD"SDIJUFDUVSFPG$POTVM */5&3/&5 4FSWFS
 'PMMPXFS 4FSWFS
 -FBEFS 4FSWFS
 'PMMPXFS $MJFOU $MJFOU

    %BUBDFOUFS -"/(044*1
 5$16%1 3&1-*$"5*0/
 5$1 3&1-*$"5*0/
 5$1 31$
 5$1 31$
 5$1 -"/(044*1
 5$16%1 %BUBDFOUFS -&"%&3 '038"3%*/( 8"/(044*1
 5$16%1 3&.05&%$ '038"3%*/( 5$1 
  9. ϚωʔδυΫϥ΢υͷશମߏ੒ $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM


    $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 $MJFOU $POTVM
 4FSWFS $POTVM
 4FSWFS $POTVM
 4FSWFS 3&1-*$"5*0/
 5$1 3&1-*$"5*0/
 5$1 31$
 5$1 31$
 5$1 31$
 5$1 
  10. ϚωʔδυΫϥ΢υͷશମߏ੒ $POTVM
 4FSWFS $POTVM
 4FSWFS $POTVM
 4FSWFS $POTVM
 4FSWFS $POTVM


    4FSWFS $POTVM
 4FSWFS 4UBHJOH 1SPEVDUJPO ߋʹɺ.VMUJ%BUBDFOUFSߏ੒ʹͳ͍ͬͯ·͢
 ڑ཭తʹ཭Εͨ%BUBDFOUFSͱ͔Ͱ͸ͳ͘ɺো֐ͷӨڹൣғ΍໊લղܾͷൣғΛ෼཭ͤ͞Δͨ Ίʹ࢖͍ͬͯ·͢  .VMUJ %BUBDFOUFS
  11. $POTVM%/4 $POTVM
 4FSWFS 
 $PNQVUF ྫ͑͹$PNQVUFͱݴΘΕΔϊʔυͰ͸ɺ
 ͜Μͳײ͡Ͱʮ6OCPVOE /4% $POTVMʯͰߏ੒͍ͯ͠·͢ $POTVM


    $MJFOU 6OCPVOE /4% # cat unbound.conf server: interface: 127.0.0.1 do-not-query-localhost: no stub-zone: name: "consul." stub-addr: 172.16.1.1@8600 stub-zone: name: “lolipop.jp.” stub-addr: 172.16.1.1@10053 DPOTVMͩͬͨΒ$POTVM%/4 MPMJQPQKQͩͬͨΒ/4% /BNF4FSWFS%BFNPO ໊લղܾͩ  4FSWJDF %JTDPWFSZ
  12. $POTVM%/4 $POTVMΛىಈ͢Ε͹)551΍%/4͕࢖༻ՄೳͱͳΓ·͢ͷͰɺ͜Μͳײ͡Ͱ֬ೝͰ͖·͢ # consul members Node Address Status Type Build

    Protocol DC server-1 10.11.1.1:80 alive client 0.9.0 2 dc1 # dig server-1.node.consul ;; ANSWER SECTION: server-1.node.consul. 0 IN A 10.11.1.1 # curl http://127.0.0.1:8500/v1/catalog/nodes|jq .[] 
  13. { "service": { { “name”: “keepalived”, “tags”: [“keepalived”], “checks”: [

    { "script”: "/usr/lib/nagios/plugins/check_procs -c 1: -a keepalived”, “interval”: "30s” } ] } } ˝LFFQBMJWFEKTPO αʔϏεͷ৔߹͸ɺ͜Μͳײ͡Ͱ+40/Ͱ$POTVMʹαʔϏεΛఆٛ͢Δͱ  $POTVM%/4 4FSWJDF %JTDPWFSZ
  14. # dig keepalived.service.consul
 ;; ANSWER SECTION: keepalived.service.consul. 0 IN A

    172.16.1.1
 keepalived.service.consul. 0 IN A 172.16.1.2
 ͜Μͳײ͡ͰTFSWJDF୯ҐͰͷ໊લղܾΛ͢Δ͜ͱ΋Ͱ͖·͢  $POTVM%/4 ͍ͭͮͯ 4FSWJDF %JTDPWFSZ
  15. $POTVM5FNQMBUF w (JU)VC͸ͪ͜ΒIUUQTHJUIVCDPNIBTIJDPSQDPOTVMUFNQMBUF
 w $POTVMͷঢ়ଶมԽΛ؂ࢹ͢ΔσʔϞϯ
 w $POTVMͷ,74ͷ৘ใΛ)551ܦ༝Ͱৗʹ؂ࢹ͍ͯ͠Δ
 w $POTVMͷԿ͔͠ΒͷΠϕϯτ ϊʔυͷ૿ݮ

    ͕ൃੜͨ͠ࡍʹɺςϯϓϨʔτϑΝΠϧΛ΋ͱ ʹઃఆϑΝΠϧΛ࠶࡞੒͠ίϚϯυͷ࣮ߦ σʔϞϯͷ࠶ىಈ౳ Λͯ͘͠ΕΔ  ,74UPSF )FBMUI $IFDLJOH 4FSWJDF %JTDPWFSZ
  16. $POTVM5FNQMBUF ͜Μͳ࣌ʹ࢖͍ͬͯΔ$POTVM5FNQMBUF
 Ұ൪ଟ͍ύλʔϯ͕͜͏͍ͬͨ3FWFSTF1SPYZͷ૿ݮΛࣗಈతʹ࣮ࢪ͢Δͱ͜ΖͰ͢ -PBE
 #BMBODFS 3FWFSTF 1SPYZ 3FWFSTF 1SPYZ 3FWFSTF

    1SPYZ -PBE #BMBODFS 3FWFSTF 1SPYZ 3FWFSTF 1SPYZ 3FWFSTF 1SPYZ ઃఆ͕ࣗಈͰॻ͖׵ΘΓɺ੾Γ཭͞ΕΔ ઃఆ͕ࣗಈͰॻ͖׵ΘΓɺ-PBE#BMBODFSʹ௥Ճ͞ΕΔ 3FWFSTF 1SPYZ  ˝3FWFSTF1SPYZ͕%PXO ˝ 3FWFSTF1SPYZΛ"%% 3WFSTF1SPYZΛ੾Γ཭ͨ͠ઃఆΛ࡞੒ͯ͠࠶ىಈ 3FWFSTF1SPYZΛ௥Ճͨ͠ઃఆΛ࡞੒ͯ͠࠶ىಈ ,74UPSF )FBMUI $IFDLJOH 4FSWJDF %JTDPWFSZ
  17. ͜Μͳײ͡Ͱઃఆͱ5FNQMBUFΛॻ͍ͯ഑ஔ͓͚ͯͩ͘͠Ͱউखʹ΍ͬͯ͘Ε·͢ʂศརʂ # cat keepavilved.conf.ctmpl virtual_server 172.1.1.1 80 { delay_loop 10

    lvs_sched rr lvs_method NAT protocol TCP {{range service "reverseproxy|passing"}} real_server {{.Address}} 80 { weight 1 TCP_CHECK { connect_port 80 connect_timeout 30 } }{{end}} } $POTVM5FNQMBUF ## cat config.hcl consul { address = "127.0.0.1:8500" ssl { enabled = false } } pid_file = "/var/run/consul-template/pid" template { source = "/etc/consul-template/keepalived.conf.ctmpl" destination = “/etc/keepalived/conf.d/reverseproxy.conf" command = "sudo systemctl reload keepalived" } SFWFSTFQSPYZͷαʔϏεΛ഑ྻʹͯ͠
 ͦΕΛશͯొ࿥͠·͢ ϊʔυͷ*1ΞυϨε ഑ஔͯ͠σʔϞϯΛSFMPBE ˝5FNQMBUF ˝$POTVM5FNQMBUFͷઃఆ  ,74UPSF )FBMUI $IFDLJOH 4FSWJDF %JTDPWFSZ
  18. $POTVMFYQPSUFS w (JU)VC͸ͪ͜ΒIUUQTHJUIVCDPNQSPNFUIFVTDPOTVM@FYQPSUFS w $POTVMͷαʔϏεͷঢ়ଶΛ1SPNFUIFVTʹసૹ͢ΔσʔϞϯ w ϚωʔδυΫϥ΢υͷ؂ࢹج൫͸1SPNFUIFVTΛ࢖༻͍ͯ͠·͢ͷͰɺ
 ϊʔυͷঢ়ଶ؅ཧͷͨΊʹ࢖༻͍ͯ͠·͢
 
 1SPNFUIFVTʹ͍ͭͯɿ


    ͬ͘͟Γઆ໌͢Δͱɺ༷ʑͳϝτϦΫεΛ࣌ܥྻͰ͍͍ײ͡ʹूܭɾه࿥Ͱ͖ΔπʔϧͰ͢
 ৄ͘͠͸ฐࣾVE[VSBͷ͜ͷลΓͷهࣄΛݟͯ΋Β͑Δͱྑ͍͔ͱࢥ͍·͢
 IUUQTVE[VSBIBUFOBCMPHKQFOUSZ
 IUUQTTQFBLFSEFDLDPNVE[VSBNBOBHFEDMPVEXJUIQSPNFUIFVT  ,74UPSF )FBMUI $IFDLJOH 4FSWJDF %JTDPWFSZ
  19. $POTVMFYQPSUFS .FUSJD .FBOJOH DPOTVM@VQ $POTVMͷ࠷ޙͷ2VFSZ͕੒ޭ͔ͨ͠ DPOTVM@TFSG@MBO@NFNCFST Ϋϥελʔ಺ͷϝϯόʔ਺ DPOTVM@DBUBMPH@TFSWJDFT Ϋϥελʔʹؚ·ΕΔαʔϏε਺ DPOTVM@DBUBMPH@TFSWJDF@OPEF@IFBMUIZ

    ϊʔυ্ͷαʔϏε͕ਖ਼ৗ͔ DPOTVM@IFBMUI@OPEF@TUBUVT ϊʔυʹؔ࿈෇͚ΒΕͨϔϧενΣοΫͷεςʔλε DPOTVM@IFBMUI@TFSWJDF@TUBUVT αʔϏεʹؔ࿈෇͚ΒΕͨϔϧενΣοΫͷεςʔλε શ෦Ͱ͸ͳ͍͕औಘͰ͖Δ৘ใ͸͜ͷΑ͏ͳײ͡Ͱɺ
 1SPNFUIFVTଆ͔Β΋͜ͷΑ͏ͳײ͡Ͱ֬ೝ͢Δ͜ͱ͕Ͱ͖·͢