Azure Arc

Control plane projecting non-Azure servers, clusters and databases into Azure Resource Manager.

Provider: azure
Kind: Coordination service
Category: Operations
Official docs: https://learn.microsoft.com/en-us/azure/azure-arc/overview

Properties · 2 set by this component

property	type	values	required	kind default	this component
consensus	enum	none \| raft \| paxos \| zab	no	none	inherited
controlPlaneFree · component property	boolean	—	no	true	inherited
extensions · component property	boolean	—	no	true	inherited
managed	boolean	—	no	false	▸ true
nodes	integer	—	no	—	inherited
policyGovernance · component property	boolean	—	no	true	inherited
replicated	boolean	—	no	false	inherited
resourceType · component property	enum	servers \| kubernetes \| data-services \| sql-server \| vmware-vsphere \| scvmm	no	—	inherited
role	enum	metadata \| lock \| discovery \| placement \| sharding \| leader-election \| config	yes	—	▸ metadata

Rules that apply · 2

Every rule whose selector covers this component's kind or its category. Whether a rule fires depends on the design: its properties, its edges and its groups.

Shared dependency without redundancyerror

shared-dependency-without-redundancy

The design requires redundant discovery, but this DNS or coordination service, which everything depends on, runs on a single provider or a single replica. Its failure is the whole system's failure.

— all of these hold:
— the design requirement `availability.discoveryRedundant` is true
— any of these hold:
— the node's `redundantProviders` is false
— the node's `replicated` is false

Stateful engine pinned to a single zoneerror

stateful-engine-pinned-to-single-zone

A matching engine, coordination service or event store living in exactly one availability zone, with no failover and no replication, is lost with that zone. Everything that depends on it stops with it.

— all of these hold:
— the node sits inside exactly 1 availability-zone group
— any of these hold:
— the node's `failover` is "none"
— the node's `replicated` is false
— the node's `replication` is "none"

Use it in a design

nodes:
  - { id: "arc", component: "azure-arc" }

Other Coordination service products · 17

Microservices Enginealibaba-msealibabacloudcoordination-service AWS Cloud Mapaws-cloud-mapawscoordination-service Azure Device Registryazure-device-registryazurecoordination-service Durable Objectscloudflare-durable-objectscloudflarecoordination-service Apache Helixapache-helixcoordination-service Consulconsulcoordination-service Generic coordination servicecoordination-servicecoordination-service etcdetcdcoordination-service Eurekaeurekacoordination-service Nacosnacoscoordination-service Oxiaoxiacoordination-service Apache ZooKeeperzookeepercoordination-service Service Directorygoogle-service-directorygcpcoordination-service Endpointsk8s-endpointsk8scoordination-service OpenStack Blazaropenstack-blazaropenstackcoordination-service OpenStack Cyborgopenstack-cyborgopenstackcoordination-service OpenStack Placementopenstack-placementopenstackcoordination-service

Source

1# yaml-language-server: $schema=../../schema/component.schema.json
2# Azure Arc: projects non-Azure servers, Kubernetes clusters, SQL Server and data services into
3# Azure Resource Manager so they carry Azure RBAC, tags and Azure Policy. "Azure Arc overview": the
4# control plane (management groups and tags, Resource Graph, RBAC, templates and extensions) is
5# offered at no extra cost, and indirectly connected mode was retired in September 2025.
6schemaVersion: "1"
7type: "component"
8id: "azure-arc"
9kind: "coordination-service"
10provider: "azure"
11docs: "https://learn.microsoft.com/en-us/azure/azure-arc/overview"
12defaults:
13  managed: true
14  role: "metadata"
15properties:
16  resourceType:
17    type: "enum"
18    values: ["servers", "kubernetes", "data-services", "sql-server", "vmware-vsphere", "scvmm"]
19  controlPlaneFree:
20    type: "boolean"
21    default: true
22  policyGovernance:
23    type: "boolean"
24    default: true
25  extensions:
26    type: "boolean"
27    default: true

The same page as markdown, for an agent: /catalogue/components/azure-arc.md