前言

• 昨天我們進行了diagram 和node的介紹，今天我們簡單快速的介紹Cluster以及Edge

正文

Cluster

參考資料：https://diagrams.mingrammer.com/docs/guides/cluster

• Cluster可以進行雲端架構的分類，每個node都可以連進連出Cluster內的node

from diagrams import Cluster, Diagram
from diagrams.aws.compute import ECS
from diagrams.aws.database import RDS
from diagrams.aws.network import Route53

with Diagram("Simple Web Service with DB Cluster", show=False):
    dns = Route53("dns")
    web = ECS("service")

    with Cluster("DB Cluster"):
        db_primary = RDS("primary")
        db_primary - [RDS("replica1"),
                     RDS("replica2")]

    dns >> web >> db_primary

• 特別的是這個Cluster也可以進行巢狀

from diagrams import Cluster, Diagram
from diagrams.aws.compute import ECS, EKS, Lambda
from diagrams.aws.database import Redshift
from diagrams.aws.integration import SQS
from diagrams.aws.storage import S3

with Diagram("Event Processing", show=False):
    source = EKS("k8s source")

    with Cluster("Event Flows"):
        with Cluster("Event Workers"):
            workers = [ECS("worker1"),
                       ECS("worker2"),
                       ECS("worker3")]

        queue = SQS("event queue")

        with Cluster("Processing"):
            handlers = [Lambda("proc1"),
                        Lambda("proc2"),
                        Lambda("proc3")]

    store = S3("events store")
    dw = Redshift("analytics")

    source >> workers >> queue >> handlers
    handlers >> store
    handlers >> dw

Edge

參考資料：https://diagrams.mingrammer.com/docs/guides/edge

• edge也有額外的屬性可以用，color和 style 和label
• style="dashed" 是虛線
• style="bold" 是粗線

from diagrams import Cluster, Diagram, Edge
from diagrams.aws.network import ELB
from diagrams.aws.compute import EC2
from diagrams.aws.database import RDSPostgresqlInstance
from diagrams.aws.integration import SQS
from diagrams.aws.analytics import ManagedStreamingForKafka as MSK
from diagrams.aws.analytics import Glue
from diagrams.aws.storage import S3
from diagrams.aws.security import Cognito
from diagrams.aws.management import Cloudwatch

with Diagram(name="Advanced Web Service with AWS (colored)", show=False):
    ingress = ELB("Load Balancer")

    metrics = Cloudwatch("CloudWatch")
    metrics << Edge(color="firebrick",
                    style="dashed") << Cloudwatch("Monitoring")

    with Cluster("Service Cluster"):
        grpcsvc = [
            EC2("grpc1"),
            EC2("grpc2"),
            EC2("grpc3")]

    with Cluster("Sessions HA"):
        primary = SQS("SQS Queue")
        primary \
            - Edge(color="brown", style="dashed") \
            - SQS("SQS Queue Replica") \
            << Edge(label="collect") \
            << metrics
        grpcsvc >> Edge(color="brown") >> primary

    with Cluster("Database HA"):
        primary = RDSPostgresqlInstance("RDS Postgres")
        primary \
            - Edge(color="brown", style="dotted") \
            - RDSPostgresqlInstance("RDS Replica") \
            << Edge(label="collect") \
            << metrics
        grpcsvc >> Edge(color="black") >> primary

    aggregator = Glue("Glue Crawler")
    aggregator \
        >> Edge(label="parse") \
        >> MSK("Kafka (MSK)") \
        >> Edge(color="black", style="bold") \
        >> S3("S3 Analytics Storage")

    ingress \
        >> Edge(color="darkgreen") \
        << grpcsvc \
        >> Edge(color="darkorange") \
        >> aggregator