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Added example manifest of function pod service in function runner page of porch documentation #249

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Added example manifest of function pod service in function runner page of porch documentation #249

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92 changes: 65 additions & 27 deletions content/en/docs/porch/function-runner-pod-templates.md
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,33 @@ spec:
...
```

Additionally, porch-fn-runner pod needs to be have access to read this pod template configmap. Assuming porch-fn-runner pod is running in porch-system namespace, following Role and Rolebindings needs to be added to porch deployment manifests.

```yaml
kind: Role
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This RBAC should be added to the catalog and deployments/porch pkgs

apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: porch-fn-runner
namespace: porch-system
rules:
- apiGroups: [""]
resources: ["configmaps"]
verbs: ["get", "list"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
name: porch-fn-runner
namespace: porch-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: porch-fn-runner
subjects:
- kind: ServiceAccount
name: porch-fn-runner
```

## Example pod template

The below pod template ConfigMap matches the default behavior:
Expand All @@ -68,31 +95,42 @@ metadata:
name: kpt-function-eval-pod-template
data:
template: |
apiVersion: v1
kind: Pod
annotations:
cluster-autoscaler.kubernetes.io/safe-to-evict: true
spec:
initContainers:
- name: copy-wrapper-server
image: gcr.io/example-google-project-id/porch-wrapper-server:latest
command:
- cp
- -a
- /wrapper-server/.
- /wrapper-server-tools
volumeMounts:
- name: wrapper-server-tools
mountPath: /wrapper-server-tools
containers:
- name: function
image: image-replaced-by-kpt-func-image
command:
- /wrapper-server-tools/wrapper-server
volumeMounts:
- name: wrapper-server-tools
mountPath: /wrapper-server-tools
volumes:
- name: wrapper-server-tools
emptyDir: {}
apiVersion: v1
kind: Pod
annotations:
cluster-autoscaler.kubernetes.io/safe-to-evict: true
spec:
initContainers:
- name: copy-wrapper-server
image: docker.io/nephio/porch-wrapper-server:latest
command:
- cp
- -a
- /wrapper-server/.
- /wrapper-server-tools
volumeMounts:
- name: wrapper-server-tools
mountPath: /wrapper-server-tools
containers:
- name: function
image: image-replaced-by-kpt-func-image
command:
- /wrapper-server-tools/wrapper-server
volumeMounts:
- name: wrapper-server-tools
mountPath: /wrapper-server-tools
volumes:
- name: wrapper-server-tools
emptyDir: {}
serviceTemplate: |
apiVersion: v1
kind: Service
spec:
ports:
- port: 9446
protocol: TCP
targetPort: 9446
selector:
fn.kpt.dev/image: to-be-replaced
type: ClusterIP
```
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