I have a Kubernetes cluster with 2 Slaves. I have 4 docker containers which all use a tomcat image and expose port 8080 and 8443. When I now put each container into a separate pod I get an issue with the ports since I only have 2 worker nodes. What would be the best strategy for my scenario?
Current error message is: 1 PodToleratesNodeTaints, 2 PodFitsHostPorts.
Put all containers into one pod? This is my current setup (times 4)
kind: Deployment
apiVersion: apps/v1beta2
metadata:
name: myApp1
namespace: appNS
labels:
app: myApp1
spec:
replicas: 1
selector:
matchLabels:
app: myApp1
template:
metadata:
labels:
app: myApp1
spec:
dnsPolicy: ClusterFirstWithHostNet
hostNetwork: true
containers:
- image: myregistry:5000/myApp1:v1
name: myApp1
ports:
- name: http-port
containerPort: 8080
- name: https-port
containerPort: 8443
readinessProbe:
httpGet:
path: /health
port: 8080
initialDelaySeconds: 30
periodSeconds: 10
failureThreshold: 6
---
kind: Service
apiVersion: v1
metadata:
name: myApp1-srv
namespace: appNS
labels:
version: "v1"
app: "myApp1"
spec:
type: NodePort
selector:
app: "myApp1"
ports:
- protocol: TCP
name: http-port
port: 8080
- protocol: TCP
name: https-port
port: 8443
You should not use hostNetwork unless absolutely necessary. Without host network you can have multiple pods listening on the same port number as each will have its own, dedicated network namespace.