43 lines
No EOL
1.5 KiB
Markdown
43 lines
No EOL
1.5 KiB
Markdown
# Third Party Resources Example
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This particular example demonstrates how to perform basic operations such as:
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* How to register a new ThirdPartyResource (custom Resource type)
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* How to create/get/list instances of your new Resource type (update/delete/etc work as well but are not demonstrated)
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## Running
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```
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# assumes you have a working kubeconfig, not required if operating in-cluster
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go run *.go -kubeconfig=$HOME/.kube/config
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```
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## Use Cases
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ThirdPartyResources can be used to implement custom Resource types for your Kubernetes cluster.
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These act like most other Resources in Kubernetes, and may be `kubectl apply`'d, etc.
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Some example use cases:
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* Provisioning/Management of external datastores/databases (eg. CloudSQL/RDS instances)
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* Higher level abstractions around Kubernetes primitives (eg. a single Resource to define an etcd cluster, backed by a Service and a ReplicationController)
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## Defining types
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Each instance of your ThirdPartyResource has an attached Spec, which should be defined via a `struct{}` to provide data format validation.
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In practice, this Spec is arbitrary key-value data that specifies the configuration/behavior of your Resource.
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For example, if you were implementing a ThirdPartyResource for a Database, you might provide a DatabaseSpec like the following:
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``` go
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type DatabaseSpec struct {
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Databases []string `json:"databases"`
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Users []User `json:"users"`
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Version string `json:"version"`
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}
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type User struct {
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Name string `json:"name"`
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Password string `json:"password"`
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}
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``` |