matthewpalmer

# Example YAML configuration for the adapter pattern.

# It defines a main application container which writes
# the current date and system usage information to a log file 
# every five seconds.

# The adapter container reads what the application has written and
# reformats it into a structure that a hypothetical monitoring 
# service requires. 

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# Example YAML configuration for the sidecar pattern.

# It defines a main application container which writes
# the current date to a log file every five seconds.

# The sidecar container is nginx serving that log file.
# (In practice, your sidecar is likely to be a log collection
# container that uploads to external storage.)

# To run:

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# Create a pod containing the PHP-FPM application (my-php-app)
# and nginx, each mounting the `shared-files` volume to their
# respective /var/www/html directories.

kind: Pod
apiVersion: v1
metadata:
  name: phpfpm-nginx-example
spec:
  volumes:

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# Create a pod that reads and writes to the
# NFS server via an NFS volume.

kind: Pod
apiVersion: v1
metadata:
  name: pod-using-nfs
spec:
  # Add the server as an NFS volume for the pod
  volumes:

matthewpalmer

kind: ConfigMap 
apiVersion: v1 
metadata:
  name: example-configmap 
data:
  # Configuration values can be set as key-value properties
  database: mongodb
  database_uri: mongodb://localhost:27017
  
  # Or set as complete file contents (even JSON!)

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kind: Pod 
apiVersion: v1 
metadata:
  name: pod-using-configmap 

spec:
  # Add the ConfigMap as a volume to the Pod
  volumes:
    # `name` here must match the name
    # specified in the volume mount

matthewpalmer

kind: Pod 
apiVersion: v1 
metadata:
  name: pod-env-var 
spec:
  containers:
    - name: env-var-configmap
      image: nginx:1.7.9 
      envFrom:
        - configMapRef:

matthewpalmer

kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: nginx-deployment
spec:
  # A deployment's specification really only 
  # has a few useful options
  
  # 1. How many copies of each pod do we want?
  replicas: 3

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# Create a pod that reads and writes to the
# NFS server via an NFS volume.

kind: Pod
apiVersion: v1
metadata:
  name: pod-using-nfs
spec:
  # Add the server as an NFS volume for the pod
  volumes:

matthewpalmer

nfs ⟩ kubectl exec -it pod-using-nfs sh
/ # cat /var/nfs/dates.txt
Mon Oct 22 00:47:36 UTC 2018
Mon Oct 22 00:47:41 UTC 2018
Mon Oct 22 00:47:46 UTC 2018



nfs ⟩ kubectl exec -it nfs-server-pod sh
# cat /exports/dates.txt