First, let’s create a namespace for our application (podinfo) to execute in. In each of the terminal sessions, execute:
kubectl create namespace podinfo
(Yes, this could have been accomplished by placing a manifest in your git repository to create the namespace)
We will be creating a number of files in your git repository for these next few steps. You can choose to create all the files first, then commit and push to the repository, or you can commit and push after each file creation. If you commit and push after each file creation, you can execute kubectl get pods -A to see what has happened.
Create a file called podinfo-deployment.yaml in your git repository:
apiVersion: apps/v1
kind: Deployment
metadata:
name: podinfo
namespace: podinfo
spec:
minReadySeconds: 3
revisionHistoryLimit: 5
progressDeadlineSeconds: 60
strategy:
rollingUpdate:
maxUnavailable: 0
type: RollingUpdate
selector:
matchLabels:
app: podinfo
template:
metadata:
annotations:
prometheus.io/scrape: "true"
prometheus.io/port: "9797"
labels:
app: podinfo
spec:
containers:
- name: podinfod
image: stefanprodan/podinfo:3.2.3
imagePullPolicy: IfNotPresent
ports:
- name: http
containerPort: 9898
protocol: TCP
- name: http-metrics
containerPort: 9797
protocol: TCP
- name: grpc
containerPort: 9999
protocol: TCP
command:
- ./podinfo
- --port=9898
- --port-metrics=9797
- --grpc-port=9999
- --grpc-service-name=podinfo
- --level=info
- --random-delay=false
- --random-error=false
env:
- name: PODINFO_UI_COLOR
value: "#34577c"
livenessProbe:
exec:
command:
- podcli
- check
- http
- localhost:9898/healthz
initialDelaySeconds: 5
timeoutSeconds: 5
readinessProbe:
exec:
command:
- podcli
- check
- http
- localhost:9898/readyz
initialDelaySeconds: 5
timeoutSeconds: 5
resources:
limits:
cpu: 2000m
memory: 512Mi
requests:
cpu: 100m
memory: 64Mi