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Host Policy trait

The host policy Trait is used for components to use host namespace..

Installation

None. The host policy trait has no external dependencies.

Supported workload types

  • core.oam.dev/v1alpha1.Server
  • core.oam.dev/v1alpha1.SingletonServer
  • core.oam.dev/v1alpha1.Task
  • core.oam.dev/v1alpha1.SingletonTask
  • core.oam.dev/v1alpha1.Worker
  • core.oam.dev/v1alpha1.SingletonWorker

Properties

Name Description Allowable values Required Default
hostNetwork hostNetwork switch. boolean false
hostPid hostPid switch. boolean false
hostIpc hostIpc switch. boolean false

Usage

This is usage of how to use the host policy trait:

apiVersion: core.oam.dev/v1alpha1
kind: ApplicationConfiguration
metadata:
  name: host-example
spec:
  components:
    - componentName: nginx-replicated
      instanceName: host-demo
      traits:
        - name: host-policy
          properties:
            hostNetwork: true
            hostPid: true
            hostIpc: true

Example

$ host-policy % kubectl apply -f component-schematics.yaml 
componentschematic.core.oam.dev/nginx-replicated created
$ host-policy % kubectl apply -f application-configurations.yaml 
applicationconfiguration.core.oam.dev/host-example created
$ host-policy % kubectl get deploy host-demo -oyaml
apiVersion: apps/v1
kind: Deployment
...
spec:
  ...
    spec:
      containers:
      - image: nginx:latest
        imagePullPolicy: Always
        name: server
        ports:
        ...
      hostIPC: true
      hostNetwork: true
      hostPID: true
...