History server fork demo

DEMO_HISTORY_SERVER_FORK.md

Flink History Server (fork)

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Current

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• The History server just needs the job-archive (GCS Bucket) location to start.

flowchart TD
    subgraph HistoryServer
    A[HistoryServer start] --> B[Start background thread]
    B --> C[(GCS job archives)]
    C --> |Prepare local static files from archives| B
    B --> |refresh| B
    A --> D[Serve static files on port 8082]
    end
    subgraph User
    E[Browser] --> |static content| D
    end

Fork

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flowchart TD
    subgraph HistoryServer
    A[HistoryServer start] --> B[ /fetch/:jobid endpoint on port 8082]
    B --> C[(GCS job archives)]
    C --> |Prepare local static files for jobid archive| B
    A --> D[Serve static files on port 8082]
    end
    subgraph User
    E[Browser] --> |fetch jobid + get static content| F[foreground]
    F <--> B
    F <--> D
    F --> |static content| E
    end