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diff --git a/doc/architecture.md b/doc/architecture.md new file mode 100644 index 0000000..ff60273 --- /dev/null +++ b/doc/architecture.md @@ -0,0 +1,37 @@ +--- +stage: Create +group: Source Code +info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments +--- + +# GitLab Shell architecture + +```mermaid +sequenceDiagram + participant Git on client + participant SSH server + participant AuthorizedKeysCommand + participant GitLab Shell + participant Rails + participant Gitaly + participant Git on server + + Note left of Git on client: git fetch + Git on client->>+SSH server: ssh git fetch-pack request + SSH server->>+AuthorizedKeysCommand: gitlab-shell-authorized-keys-check git AAAA... + AuthorizedKeysCommand->>+Rails: GET /internal/api/authorized_keys?key=AAAA... + Note right of Rails: Lookup key ID + Rails-->>-AuthorizedKeysCommand: 200 OK, command="gitlab-shell upload-pack key_id=1" + AuthorizedKeysCommand-->>-SSH server: command="gitlab-shell upload-pack key_id=1" + SSH server->>+GitLab Shell: gitlab-shell upload-pack key_id=1 + GitLab Shell->>+Rails: GET /internal/api/allowed?action=upload_pack&key_id=1 + Note right of Rails: Auth check + Rails-->>-GitLab Shell: 200 OK, { gitaly: ... } + GitLab Shell->>+Gitaly: SSHService.SSHUploadPack request + Gitaly->>+Git on server: git upload-pack request + Note over Git on client,Git on server: Bidirectional communication between Git client and server + Git on server-->>-Gitaly: git upload-pack response + Gitaly -->>-GitLab Shell: SSHService.SSHUploadPack response + GitLab Shell-->>-SSH server: gitlab-shell upload-pack response + SSH server-->>-Git on client: ssh git fetch-pack response +``` |