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71 lines
1.9 KiB
71 lines
1.9 KiB
5 years ago
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---
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id: cluster
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title: Clusters
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---
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Cluster allows you group (or clustering) the nodes in an isolated group.
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## Basic
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Cluster represents a local cluster context.
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You can create a cluster context with Cluster class. And you can also connect the nodes in a cluster to other nodes outside a cluster.
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```python
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from diagrams import Cluster, Diagram
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from diagrams.aws.compute import ECS
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from diagrams.aws.database import RDS
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from diagrams.aws.network import Route53
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with Diagram("Simple Web Service with DB Cluster", show=False):
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dns = Route53("dns")
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web = ECS("service")
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with Cluster("DB Cluster"):
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db_master = RDS("master")
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db_master - [RDS("slave1"),
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RDS("slave2")]
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dns >> web >> db_master
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```
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## Nested Clusters
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Nested clustering is also possible.
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```python
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from diagrams import Cluster, Diagram
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from diagrams.aws.compute import ECS, EKS, Lambda
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from diagrams.aws.database import Redshift
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from diagrams.aws.integration import SQS
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from diagrams.aws.storage import S3
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with Diagram("Event Processing", show=False):
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source = EKS("k8s source")
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with Cluster("Event Flows"):
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with Cluster("Event Workers"):
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workers = [ECS("worker1"),
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ECS("worker2"),
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ECS("worker3")]
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queue = SQS("event queue")
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with Cluster("Processing"):
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handlers = [Lambda("proc1"),
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Lambda("proc2"),
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Lambda("proc3")]
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store = S3("events store")
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dw = Redshift("analytics")
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source >> workers >> queue >> handlers
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handlers >> store
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handlers >> dw
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```
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> There is no depth limit of nesting. Feel free to create nested clusters as deep as you want.
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