consul/docs/service-mesh/ca/hl-ca-overview.mmd

graph TD
    subgraph "Primary DC"
        leaderP["Leader"]
        rootCAI["Root CA "]
        rootCA["Root CA "]
        Provider["Consul/AWS providers"]
        IntermediateProvider["Vault provider"]
        intermediateCAP["Intermediate CA "]
        leafP["Leaf certificates"]
    end

    subgraph "Secondary DC"
        leaderS["Leader"]
        intermediateCAS["Intermediate CA"]
        leafS["Leaf certificates"]
        ProviderS["Consul/AWS/Vault providers"]
    end

    consulCAS["Consul client Agents"]
    servicesS["Mesh services"]

    consulCAP["Consul client Agents"]
    servicesP["Mesh services"]
    
    leaderP -->|use|Provider
    leaderP-->|use|IntermediateProvider
    Provider--> |fetch/self sign|rootCA
    IntermediateProvider --> |fetch/self sign|rootCAI 
    rootCAI -->|sign| intermediateCAP
    intermediateCAP -->|sign| leafP
    rootCA -->|sign| leafP

    leaderS -->|use| ProviderS
    ProviderS --> |generate csr| intermediateCAS
    rootCA -->|sign| intermediateCAS
    rootCAI -->|sign| intermediateCAS
    intermediateCAS --> |sign| leafS

    leafS -->|auth/encrypt| servicesS
    leafS -->|auth/encrypt| consulCAS
    leafP -->|auth/encrypt| servicesP
    leafP -->|auth/encrypt| consulCAP