Add a basic ghost package (#3381)

* Add ghost basic package

* update ghost pacakge

* remove set-labels

Author: yuwenma

package-examples/ghost/Kptfile

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+apiVersion: kpt.dev/v1
+kind: Kptfile
+metadata:
+  name: ghost
+  annotations:
+    config.kubernetes.io/local-config: "true"
+info:
+  description: sample description
+pipeline:
+  mutators:
+    - image: gcr.io/kpt-fn/set-namespace:v0.3.4
+      configPath: package-context.yaml

package-examples/ghost/README.md

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+### Ghost Application
+
+"Ghost is a powerful app for new-media creators to publish, share, and grow a business around their content. It comes with modern tools to build a website, publish content, send newsletters & offer paid subscriptions to members."
+https://ghost.org/
+
+### Quick start
+
+#### Get KPT Pacakge
+```bash
+export NAMESPACE=<YOUR NAMESPACE>
+# make sure the namespace is correct and exists. Otherwise, create the namespace
+kubectl create namespace ${NAMESPACE}
+
+# You get this Ghost package by running
+kpt pkg get https://github.com/GoogleContainerTools/kpt.git/package-examples/ghost@main ${NAMESPACE} --for-deployment
+```
+
+#### Update the KRM resources to your own data
+
+Updating the KRM resources are easy with variant constructor
+```bash
+kpt fn render ${NAMESPACE}
+```
+
+#### Deploy the KRM resources to your cluster
+
+```bash
+# Initialize inventory info. You only need to run this if do not have resourcesgroup.yaml
+kpt live init ${NAMESPACE}
+
+kpt live apply ${NAMESPACE}
+```

package-examples/ghost/crds/prometheusrules.yaml

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+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  annotations:
+    controller-gen.kubebuilder.io/version: v0.8.0
+  creationTimestamp: null
+  name: prometheusrules.monitoring.coreos.com
+spec:
+  group: monitoring.coreos.com
+  names:
+    categories:
+    - prometheus-operator
+    kind: PrometheusRule
+    listKind: PrometheusRuleList
+    plural: prometheusrules
+    shortNames:
+    - promrule
+    singular: prometheusrule
+  scope: Namespaced
+  versions:
+  - name: v1
+    schema:
+      openAPIV3Schema:
+        description: PrometheusRule defines recording and alerting rules for a Prometheus
+          instance
+        properties:
+          apiVersion:
+            description: 'APIVersion defines the versioned schema of this representation
+              of an object. Servers should convert recognized schemas to the latest
+              internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources'
+            type: string
+          kind:
+            description: 'Kind is a string value representing the REST resource this
+              object represents. Servers may infer this from the endpoint the client
+              submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds'
+            type: string
+          metadata:
+            type: object
+          spec:
+            description: Specification of desired alerting rule definitions for Prometheus.
+            properties:
+              groups:
+                description: Content of Prometheus rule file
+                items:
+                  description: 'RuleGroup is a list of sequentially evaluated recording
+                    and alerting rules. Note: PartialResponseStrategy is only used
+                    by ThanosRuler and will be ignored by Prometheus instances.  Valid
+                    values for this field are ''warn'' or ''abort''.  More info: https://github.com/thanos-io/thanos/blob/main/docs/components/rule.md#partial-response'
+                  properties:
+                    interval:
+                      type: string
+                    name:
+                      type: string
+                    partial_response_strategy:
+                      type: string
+                    rules:
+                      items:
+                        description: 'Rule describes an alerting or recording rule
+                          See Prometheus documentation: [alerting](https://www.prometheus.io/docs/prometheus/latest/configuration/alerting_rules/)
+                          or [recording](https://www.prometheus.io/docs/prometheus/latest/configuration/recording_rules/#recording-rules)
+                          rule'
+                        properties:
+                          alert:
+                            type: string
+                          annotations:
+                            additionalProperties:
+                              type: string
+                            type: object
+                          expr:
+                            anyOf:
+                            - type: integer
+                            - type: string
+                            x-kubernetes-int-or-string: true
+                          for:
+                            type: string
+                          labels:
+                            additionalProperties:
+                              type: string
+                            type: object
+                          record:
+                            type: string
+                        required:
+                        - expr
+                        type: object
+                      type: array
+                  required:
+                  - name
+                  - rules
+                  type: object
+                type: array
+            type: object
+        required:
+        - spec
+        type: object
+    served: true
+    storage: true
+status:
+  acceptedNames:
+    kind: ""
+    plural: ""
+  conditions: []
+  storedVersions: []

package-examples/ghost/ghost-app/Kptfile

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+apiVersion: kpt.dev/v1
+kind: Kptfile
+metadata:
+  name: ghost-app
+  annotations:
+    config.kubernetes.io/local-config: "true"
+info:
+  description: The Ghost App package contains the KRM resources for a Ghost Application.

package-examples/ghost/ghost-app/deployment-ghost.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: ghost-app
+  namespace: example
+spec:
+  replicas: 1
+  strategy:
+    type: RollingUpdate
+  template:
+    spec:
+      affinity:
+        podAffinity:
+        podAntiAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+            - podAffinityTerm:
+                namespaces:
+                  - "example"
+                topologyKey: kubernetes.io/hostname
+              weight: 1
+        nodeAffinity:
+      securityContext:
+        fsGroup: 1001
+      containers:
+        - name: ghost-app
+          image: docker.io/bitnami/ghost:4.45.0-debian-10-r0
+          imagePullPolicy: "IfNotPresent"
+          securityContext:
+            runAsNonRoot: true
+            runAsUser: 1001
+          env:
+            - name: BITNAMI_DEBUG
+              value: "false"
+            - name: ALLOW_EMPTY_PASSWORD
+              value: "yes"
+            - name: GHOST_DATABASE_HOST
+              value: "example-mariadb"
+            - name: GHOST_DATABASE_PORT_NUMBER
+              value: "3306"
+            - name: GHOST_DATABASE_NAME
+              value: "bitnami_ghost"
+            - name: GHOST_DATABASE_USER
+              value: "bn_ghost"
+            - name: GHOST_HOST
+              value: "aa/"
+            - name: GHOST_PORT_NUMBER
+              value: "2368"
+            - name: GHOST_USERNAME
+              value: "user"
+            - name: GHOST_EMAIL
+              value: "user@example.com"
+            - name: GHOST_BLOG_TITLE
+              value: "User's Blog"
+            - name: GHOST_ENABLE_HTTPS
+              value: "no"
+            - name: GHOST_EXTERNAL_HTTP_PORT_NUMBER
+              value: "80"
+            - name: GHOST_EXTERNAL_HTTPS_PORT_NUMBER
+              value: "443"
+            - name: GHOST_SKIP_BOOTSTRAP
+              value: "no"
+          ports:
+            - name: http
+              containerPort: 2368
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /
+              port: "http"
+              scheme: HTTP
+            initialDelaySeconds: 120
+            periodSeconds: 10
+            timeoutSeconds: 5
+            failureThreshold: 6
+            successThreshold: 1
+          readinessProbe:
+            httpGet:
+              path: /
+              port: "http"
+              scheme: HTTP
+            initialDelaySeconds: 30
+            periodSeconds: 5
+            timeoutSeconds: 3
+            failureThreshold: 6
+            successThreshold: 1
+          resources:
+            limits: {}
+            requests: {}
+          volumeMounts:
+            - name: ghost-data
+              mountPath: /bitnami/ghost
+      volumes:
+        - name: ghost-data
+          persistentVolumeClaim:
+            claimName: ghost-app

package-examples/ghost/ghost-app/ingress-ghost.yaml

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+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: ghost-app
+  namespace: example
+spec:
+  rules:
+    - host: ghost.local
+      http:
+        paths:
+          - path: /
+            pathType: ImplementationSpecific
+            backend:
+              service:
+                name: ghost-app
+                port:
+                  name: http

package-examples/ghost/ghost-app/networkpolicy-ghost-ingress.yaml

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+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: ghost-app
+spec:
+  ingress:

package-examples/ghost/ghost-app/package-context.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: kptfile.kpt.dev
+  annotations:
+    config.kubernetes.io/local-config: "true"
+data:
+  name: example

package-examples/ghost/ghost-app/persistentvolumeclaim-ghost.yaml

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+# Source: ghost/templates/pvc.yaml
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: ghost-app
+  namespace: example
+spec:
+  accessModes:
+    - "ReadWriteOnce"
+  resources:
+    requests:
+      storage: "8Gi"

package-examples/ghost/ghost-app/service-ghost.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: ghost-app
+  namespace: example
+spec:
+  type: LoadBalancer
+  externalTrafficPolicy: Cluster
+  sessionAffinity: None
+  ports:
+    - name: http
+      port: 80
+      protocol: TCP
+      targetPort: http