hr_k

hr_k

Git Pull Event Trace Log(client/server)

5 분 소요

Overview

git pull 실행 시 클라이언트 ↔ 서버 간 연계에 대한 트레이스

Endpoint

  • 1단계 Discovery: GET {prefix}/info/refs?service=git-upload-pack [Adverties, Negotitation]
  • 2단계 Fetching Packfile: POST {prefix}/git-upload-pack

Step

1) Discovery Advertise

1-1) Advertise :: Client → Server: refs 정보 요청 (Advertise-Refs)

  • 의미: git pull 이벤트와 함께 refs 정보 서버로 요청
  • 엔드포인트: GET /info/refs?service=git-upload-pack 
    16:03:05.672103 git.c:479               trace: built-in: git pull --rebase
16:03:05.676203 run-command.c:666       trace: run_command: git merge-base --fork-point refs/remotes/origin/devs devs
16:03:05.676219 run-command.c:758       trace: start_command: /opt/homebrew/opt/git/libexec/git-core/git merge-base --fork-point refs/remotes/origin/devs devs
16:03:05.688176 run-command.c:666       trace: run_command: git fetch --update-head-ok
16:03:05.688226 run-command.c:758       trace: start_command: /opt/homebrew/opt/git/libexec/git-core/git fetch --update-head-ok
16:03:05.695026 git.c:479               trace: built-in: git fetch --update-head-ok
16:03:05.697631 run-command.c:666       trace: run_command: GIT_DIR=.git git remote-http origin http://localhost:8084/okgit/git/CMPART/repo4.git
16:03:05.697640 run-command.c:758       trace: start_command: /opt/homebrew/opt/git/libexec/git-core/git remote-http origin http://localhost:8084/okgit/git/CMPART/repo4.git
16:03:05.704320 git.c:781               trace: exec: git-remote-http origin http://localhost:8084/okgit/git/CMPART/repo4.git
16:03:05.704639 run-command.c:666       trace: run_command: git-remote-http origin http://localhost:8084/okgit/git/CMPART/repo4.git
16:03:05.704647 run-command.c:758       trace: start_command: /opt/homebrew/opt/git/libexec/git-core/git-remote-http origin http://localhost:8084/okgit/git/CMPART/repo4.git
16:03:05.716170 http.c:913              == Info: Couldn't find host localhost in the .netrc file; using defaults
16:03:05.716405 http.c:913              == Info: Host localhost:8084 was resolved.
16:03:05.716409 http.c:913              == Info: IPv6: ::1
16:03:05.716410 http.c:913              == Info: IPv4: 127.0.0.1
16:03:05.716429 http.c:913              == Info:   Trying [::1]:8084...
16:03:05.716576 http.c:913              == Info: Connected to localhost (::1) port 8084
16:03:05.716603 http.c:860              => Send header, 0000000245 bytes (0x000000f5)
16:03:05.716606 http.c:872              => Send header: GET /okgit/git/CMPART/repo4.git/info/refs?service=git-upload-pack HTTP/1.1

1-2) Advertise :: Server → Client: refs 광고 응답

  • 의미: 서버가 참조(브랜치/HEAD)와 capabilities를 광고(refs 엔드포인트로 요청을 받은 서버는 refs 정보를 도출해 클라이언트로 응답.)
2025-11-11 15:11:02 [DEBUG] [http-nio-8084-exec-7] o.o.t.g.i.c.filter.HttpLogFilter - HTTP Method: [GET], URI: [/okgit/git/CMPART/repo4.git/info/refs], SevletPath: [/git], PathInfo: [/CMPART/repo4.git/info/refs]
2025-11-11 15:11:02 [INFO] [http-nio-8084-exec-7] o.o.t.g.i.config.GitHttpConfig - $$$ AdvertiseRefsHook advertiseRefs! discovery!: client: [0:0:0:0:0:0:0:1], repo: [/okgit/git/CMPART/repo4.git/info/refs]

2025-11-11 15:11:02 [INFO] [http-nio-8084-exec-7] o.o.t.g.i.config.GitHttpConfig - refKey: [HEAD] || refValue: [SymbolicRef[HEAD -> refs/heads/main=5451d6013b97bb6728ec8aa048ea208a9dae923a(-1)]]
2025-11-11 15:11:02 [INFO] [http-nio-8084-exec-7] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/branchPushTest] || refValue: [Ref[refs/heads/branchPushTest=19f8d70c656327448e14978578f8864344584011(-1)]]
2025-11-11 15:11:02 [INFO] [http-nio-8084-exec-7] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/devs] || refValue: [Ref[refs/heads/devs=d7dedb6ca08292dc602c36c2dd95ab0c1373c102(-1)]]
2025-11-11 15:11:02 [INFO] [http-nio-8084-exec-7] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/feature001] || refValue: [Ref[refs/heads/feature001=e6588fe025ce44f9a09930564fbb1fc239268137(-1)]]
2025-11-11 15:11:02 [INFO] [http-nio-8084-exec-7] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/main] || refValue: [Ref[refs/heads/main=5451d6013b97bb6728ec8aa048ea208a9dae923a(-1)]]
2025-11-11 15:11:02 [INFO] [http-nio-8084-exec-7] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/main2] || refValue: [Ref[refs/heads/main2=31e44feb657394d909d7a75631a57dbead273be9(-1)]]
2025-11-11 15:11:02 [INFO] [http-nio-8084-exec-7] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/main3] || refValue: [Ref[refs/heads/main3=e399c6468707df9463a9c633355d8c9337bc2b23(-1)]]

2) Negotiation

2-1) Client: refs 기반으로 wants/haves 계산

  • 의미: refs 정보를 수신한 클라이언트는 로컬에있는 해시를 비교하고 로컬의 추가로딩이 필요한경우 (로컬의 해시와 서버의 해시가 다른경우) wants, have 정보를 도출한다. 만약 서버로부터 받은 ID값이 현재 클라이언트가가진 ID가 동일하다면 여기서 모든 Pull에 대한 프로세스 종료
16:03:05.784421 http.c:913              == Info: Connection #0 to host localhost left intact
16:03:05.784432 run-command.c:666       trace: run_command: 'git credential-store store'
16:03:05.784434 run-command.c:758       trace: start_command: /bin/sh -c 'git credential-store store' 'git credential-store store'
16:03:05.798090 git.c:479               trace: built-in: git credential-store store
16:03:05.799599 pkt-line.c:86           packet:          git< # service=git-upload-pack
16:03:05.799613 pkt-line.c:86           packet:          git< 0000
16:03:05.799616 pkt-line.c:86           packet:          git< 5451d6013b97bb6728ec8aa048ea208a9dae923a HEAD\0 include-tag multi_ack_detailed multi_ack ofs-delta side-band side-band-64k thin-pack no-progress shallow no-done agent=JGit/7.3.0.202506031305-r symref=HEAD:refs/heads/main
16:03:05.799632 pkt-line.c:86           packet:          git< 19f8d70c656327448e14978578f8864344584011 refs/heads/branchPushTest
16:03:05.799637 pkt-line.c:86           packet:          git< 2dd5b72b58dedba0dd808f788a98ed6a029419db refs/heads/devs
16:03:05.799639 pkt-line.c:86           packet:          git< e6588fe025ce44f9a09930564fbb1fc239268137 refs/heads/feature001
16:03:05.799640 pkt-line.c:86           packet:          git< 5451d6013b97bb6728ec8aa048ea208a9dae923a refs/heads/main
16:03:05.799641 pkt-line.c:86           packet:          git< 31e44feb657394d909d7a75631a57dbead273be9 refs/heads/main2
16:03:05.799663 pkt-line.c:86           packet:          git< e399c6468707df9463a9c633355d8c9337bc2b23 refs/heads/main3
16:03:05.799670 pkt-line.c:86           packet:          git< 0000
16:03:05.803902 pkt-line.c:86           packet:          git> 2dd5b72b58dedba0dd808f788a98ed6a029419db refs/heads/devs
16:03:05.803908 pkt-line.c:86           packet:          git> 0000
16:03:05.803917 run-command.c:666       trace: run_command: git fetch-pack --stateless-rpc --stdin --lock-pack --include-tag --thin http://localhost:8084/okgit/git/CMPART/repo4.git/
16:03:05.803928 run-command.c:758       trace: start_command: /opt/homebrew/opt/git/libexec/git-core/git fetch-pack --stateless-rpc --stdin --lock-pack --include-tag --thin http://localhost:8084/okgit/git/CMPART/repo4.git/
16:03:05.811325 git.c:479               trace: built-in: git fetch-pack --stateless-rpc --stdin --lock-pack --include-tag --thin http://localhost:8084/okgit/git/CMPART/repo4.git/
16:03:05.811668 pkt-line.c:86           packet:   fetch-pack< 2dd5b72b58dedba0dd808f788a98ed6a029419db refs/heads/devs
16:03:05.811673 pkt-line.c:86           packet:   fetch-pack< 0000
16:03:05.811676 pkt-line.c:86           packet:   fetch-pack< 5451d6013b97bb6728ec8aa048ea208a9dae923a HEAD\0 include-tag multi_ack_detailed multi_ack ofs-delta side-band side-band-64k thin-pack no-progress shallow no-done agent=JGit/7.3.0.202506031305-r symref=HEAD:refs/heads/main
16:03:05.811686 pkt-line.c:86           packet:   fetch-pack< 19f8d70c656327448e14978578f8864344584011 refs/heads/branchPushTest
16:03:05.811688 pkt-line.c:86           packet:   fetch-pack< 2dd5b72b58dedba0dd808f788a98ed6a029419db refs/heads/devs
16:03:05.811690 pkt-line.c:86           packet:   fetch-pack< e6588fe025ce44f9a09930564fbb1fc239268137 refs/heads/feature001
16:03:05.811692 pkt-line.c:86           packet:   fetch-pack< 5451d6013b97bb6728ec8aa048ea208a9dae923a refs/heads/main
16:03:05.811694 pkt-line.c:86           packet:   fetch-pack< 31e44feb657394d909d7a75631a57dbead273be9 refs/heads/main2
16:03:05.811696 pkt-line.c:86           packet:   fetch-pack< e399c6468707df9463a9c633355d8c9337bc2b23 refs/heads/main3
16:03:05.811697 pkt-line.c:86           packet:   fetch-pack< 0000

3) Packfile Retrieval

3-1) Client → Server: wants/haves 전송 (협상 시작)

  • 엔드포인트: POST /git-upload-pack
  • 의미: 가져올 대상(want) 과 이미 가진 것(have) 을 전송(도출된 wants (추가로 받아와야하는 내용들)가 있다면, 해당내용을 재요청
16:03:05.819140 pkt-line.c:86           packet:   fetch-pack> want 2dd5b72b58dedba0dd808f788a98ed6a029419db multi_ack_detailed no-done side-band-64k thin-pack include-tag ofs-delta agent=git/2.47.0
16:03:05.819146 pkt-line.c:86           packet:   fetch-pack> 0000
16:03:05.819149 pkt-line.c:86           packet:   fetch-pack> have d7dedb6ca08292dc602c36c2dd95ab0c1373c102
16:03:05.819151 pkt-line.c:86           packet:   fetch-pack> have f7da6d996f1a6f9c76588b29c15d0f925a2b7bb6
16:03:05.819152 pkt-line.c:86           packet:   fetch-pack> have ef49ca3cde90496cb5a201f04346f2b0ffe9f8cd
16:03:05.819154 pkt-line.c:86           packet:   fetch-pack> have 19f8d70c656327448e14978578f8864344584011
16:03:05.819157 pkt-line.c:86           packet:   fetch-pack> have 5451d6013b97bb6728ec8aa048ea208a9dae923a
16:03:05.819158 pkt-line.c:86           packet:   fetch-pack> have e399c6468707df9463a9c633355d8c9337bc2b23
16:03:05.819159 pkt-line.c:86           packet:   fetch-pack> have 31e44feb657394d909d7a75631a57dbead273be9
16:03:05.819161 pkt-line.c:86           packet:   fetch-pack> have 4846d60a8d7ff1cd9fda6009a2814c638bb79a27
16:03:05.819162 pkt-line.c:86           packet:   fetch-pack> have e6588fe025ce44f9a09930564fbb1fc239268137
16:03:05.819164 pkt-line.c:86           packet:   fetch-pack> have 81ab494eacd9da298a4003b11cea4ea779eed303
16:03:05.819165 pkt-line.c:86           packet:   fetch-pack> done
16:03:05.819169 pkt-line.c:86           packet:   fetch-pack> 0000
16:03:05.819189 pkt-line.c:86           packet:          git< 008cwant 2dd5b72b58dedba0dd808f788a98ed6a029419db multi_ack_detailed no-done side-band-64k thin-pack include-tag ofs-delta agent=git/2.47.000000032have d7dedb6ca08292dc602c36c2dd95ab0c1373c1020032have f7da6d996f1a6f9c76588b29c15d0f925a2b7bb60032have ef49ca3cde90496cb5a201f04346f2b0ffe9f8cd0032have 19f8d70c656327448e14978578f88643445840110032have 5451d6013b97bb6728ec8aa048ea208a9dae923a0032have e399c6468707df9463a9c633355d8c9337bc2b230032have 31e44feb657394d909d7a75631a57dbead273be90032have 4846d60a8d7ff1cd9fda6009a2814c638bb79a270032have e6588fe025ce44f9a09930564fbb1fc2392681370032have 81ab494eacd9da298a4003b11cea4ea779eed3030009done
16:03:05.819217 pkt-line.c:86           packet:          git< 0000
16:03:05.819275 http.c:913              == Info: Found bundle for host: 0x600001e80930 [serially]
16:03:05.819277 http.c:913              == Info: Can not multiplex, even if we wanted to
16:03:05.819285 http.c:913              == Info: Re-using existing connection with host localhost
16:03:05.819352 http.c:913              == Info: Server auth using Basic with user 'sysadmin'
16:03:05.819396 http.c:860              => Send header, 0000000343 bytes (0x00000157)
16:03:05.819401 http.c:872              => Send header: POST /okgit/git/CMPART/repo4.git/git-upload-pack HTTP/1.1

3-2) Server → Client: packfile 생성·전송

  • 의미: 서버가 협상 결과에 따라 PACK 생성 후 전송(wants 요청값을 수신한 서버는 해당 내용을가지고, 클라이언트에게 packfile 을 만들어 클라이언트에 응답한다.)
2025-11-11 16:11:05 [DEBUG] [http-nio-8084-exec-1] o.o.t.g.i.c.filter.HttpLogFilter - HTTP Method: [POST], URI: [/okgit/git/CMPART/repo4.git/git-upload-pack], SevletPath: [/git], PathInfo: [/CMPART/repo4.git/git-upload-pack]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - $$$ AdvertiseRefsHook advertiseRefs! clientSID: [null], repositoryPath: [/Users/hwiryungkim/tmptmp/bare/CMPART/repo4.git]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - $$$ AdvertiseRefsHook advertiseRefs! discovery!: client: [0:0:0:0:0:0:0:1], repo: [/okgit/git/CMPART/repo4.git/git-upload-pack]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - refKey: [HEAD] || refValue: [SymbolicRef[HEAD -> refs/heads/main=5451d6013b97bb6728ec8aa048ea208a9dae923a(-1)]]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/branchPushTest] || refValue: [Ref[refs/heads/branchPushTest=19f8d70c656327448e14978578f8864344584011(-1)]]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/devs] || refValue: [Ref[refs/heads/devs=2dd5b72b58dedba0dd808f788a98ed6a029419db(-1)]]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/feature001] || refValue: [Ref[refs/heads/feature001=e6588fe025ce44f9a09930564fbb1fc239268137(-1)]]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/main] || refValue: [Ref[refs/heads/main=5451d6013b97bb6728ec8aa048ea208a9dae923a(-1)]]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/main2] || refValue: [Ref[refs/heads/main2=31e44feb657394d909d7a75631a57dbead273be9(-1)]]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - refKey: [refs/heads/main3] || refValue: [Ref[refs/heads/main3=e399c6468707df9463a9c633355d8c9337bc2b23(-1)]]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - [v0/v1] $$$ PreUploadHook.onBeginNegotiateRound(): round, wants=1, havesSeen=10
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - Client's Wants List:
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - wants: [2dd5b72b58dedba0dd808f788a98ed6a029419db]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - [v0/v1] $$$ PreUploadHook.onEndNegotiateRound(): wants: [commit 2dd5b72b58dedba0dd808f788a98ed6a029419db 1762844577 -----sp]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - [v0/v1] $$$ PreUploadHook.onSendPack(): wants: [[commit 2dd5b72b58dedba0dd808f788a98ed6a029419db 1762844577 -----sp]], haves: [[commit 5451d6013b97bb6728ec8aa048ea208a9dae923a 1759213017 ------p, commit 81ab494eacd9da298a4003b11cea4ea779eed303 1758513914 ------p, commit e399c6468707df9463a9c633355d8c9337bc2b23 1759212898 ------p, commit 19f8d70c656327448e14978578f8864344584011 1762315581 ------p, commit e6588fe025ce44f9a09930564fbb1fc239268137 1758522632 ------p, commit 31e44feb657394d909d7a75631a57dbead273be9 1759211658 ------p, commit ef49ca3cde90496cb5a201f04346f2b0ffe9f8cd 1762316999 ------p, commit d7dedb6ca08292dc602c36c2dd95ab0c1373c102 1762320649 -----sp]]
2025-11-11 16:11:05 [INFO] [http-nio-8084-exec-1] o.o.t.g.i.config.GitHttpConfig - [v0/v1] sendPack(types on wants): commit=[1], tree=[0], blob=[0], tag=[0], others=[0]

Diagram

sequenceDiagram
  autonumber
  participant C as Client
  participant S as Server (JGit)

  alt Discovery Advertise
      C->>S: GET /info/refs?service=git-upload-pack
      S-->>C: refs + capabilities (Advertise-Refs)
  end
  alt Negotiation
      C->>C: compute wants/haves
  end
  alt Fetching PackFile
  C->>S: POST /git-upload-pack (wants, haves, done)
  S-->>C: PACK (side-band, thin-pack)
  C->>C: update remote-tracking branch, merge/rebase
  end

카테고리:

업데이트:

참고

3 분 소요

최대 1 분 소요

최대 1 분 소요

3 분 소요