example.yaml

# Copyright 2023 Undistro Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

apiVersion: v1
kind: Namespace
metadata:
  name: app
---
apiVersion: v1
kind: Namespace
metadata:
  name: config
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: myapp
  namespace: app
---
apiVersion: v1
kind: Pod
metadata:
  name: myapp
  namespace: app
  labels:
    app: myapp
spec:
  serviceAccountName: myapp
  volumes:
    - name: global-config
      emptyDir: {}
  initContainers:
    - name: global-config
      image: ghcr.io/undistro/kubexns:v0.1.1
      volumeMounts:
        - mountPath: "/tmp/.config"
          name: global-config
      env:
        - name: DIR
          value: "/tmp/.config"
        - name: CONFIGMAPS
          value: "config/global-config"
        - name: SECRETS_SELECTOR
          value: "foo=bar"
  containers:
    - name: bash
      image: bash:latest
      imagePullPolicy: IfNotPresent
      command: ["watch"]
      args: ["ls", "-lha", "/tmp/.config"]
      volumeMounts:
        - mountPath: "/tmp/.config"
          name: global-config
  restartPolicy: Always
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: global-config
  namespace: config
data:
  config.yaml: >
    key: value
---
apiVersion: v1
kind: Secret
metadata:
  name: global-cred
  namespace: config
  labels:
    foo: bar
data:
  cred.yaml: Zm9vOiBiYXIK
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: config-viewer
rules:
  - apiGroups: [""]
    resources: ["configmaps", "secrets"]
    verbs: ["get", "list"]
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: myapp-config-viewer
roleRef:
  kind: ClusterRole
  name: config-viewer
  apiGroup: rbac.authorization.k8s.io
subjects:
  - kind: ServiceAccount
    name: myapp
    namespace: app