configmap.yaml

#
#  Author: Hari Sekhon
#  Date: [% DATE  # 2020-09-21 15:01:45 +0100 (Mon, 21 Sep 2020) %]
#
#  vim:ts=2:sts=2:sw=2:et
#  lint: k8s
#
#  https://github.com/HariSekhon/Kubernetes-configs
#
#  License: see accompanying Hari Sekhon LICENSE file
#
#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
#  https://www.linkedin.com/in/HariSekhon
#

# ============================================================================ #
#                               C o n f i g M a p
# ============================================================================ #

# https://kubernetes.io/docs/concepts/configuration/configmap/

# https://kubernetes.io/docs/reference/kubernetes-api/config-and-storage-resources/config-map-v1/

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: NAME
  namespace: NAMESPACE
data:
  my.magic.number: "3"
  my.properties.file: "NAME.properties"
  google.project.id: my-project-123456  # export this to a standard GOOGLE_CLOUD_PROJECT env var in deployment
  stackdriver.project.id: my-project-123456
  # where to connect to backend in this environment (username + password should be in a secret instead)
  db.host: mydatabase.domain.com
  db.name: myDB
  # could be mounted as an ini properties file
  my.properties: |
    setting1=test1
    setting2=test2
# prevent accidental updates causing outages
# improve performance / reduce load on kube-apiserver by closing watches on this configmap
# cannot be replaced - only deleted + recreated - existing pods will not be affected and must be manually recreated
immutable: true  # 1.19+