Kubernetes pod arguments are not displayed in Service under Args: without error

Question

I created a singlePod.yaml file to properly describe the kubernetes pod service that passes arguments, and can run like this: kubectl create -f ./singlePod.yaml

I want the arguments called to match Docker:

docker run -it -p 8080:8080 joethecoder2/spring-boot-web cassandra_ip=127.0.0.1 cassandra_port=9042

apiVersion: v1
kind: Pod
metadata:
  name: spring-boot-web-demo
  labels:
    purpose: demonstrate-spring-boot-web
spec:
  containers:
  - name: spring-boot-web
    image: docker.io/joethecoder2/spring-boot-web
    env:
    - name: "cassandra_ip"
      value: "127.0.0.1"
    - name: "cassandra_port"
      value: "9042"
    command: ["java","-jar", "spring-boot-web-0.0.1-SNAPSHOT.jar", "cassandra_ip=127.0.0.1", "cassandra_port=9042"]
    args: ["$(cassandra_ip)", "$(cassandra_port)"]
  restartPolicy: OnFailure
<!-- Paste the part of the code that shows the problem. (Please indent 4 spaces.) -->

The problem is that although the arguments have been added to the below service, the arguments do not take effect to the calling program (spring-boot-web-0.0.1-SNAPSHOT.jar)

Name:       spring-boot-web-demo
Namespace:  default
Node:       minikube/192.168.64.3
Start Time: Thu, 07 Dec 2017 12:08:10 -0500
Labels:     purpose=demonstrate-spring-boot-web
Annotations:    <none>
Status:     Running
IP:     172.17.0.2
Controllers:    <none>
Containers:
  spring-boot-web:
    Container ID:   docker://1c9543e412b50b36182528d690121014dfe7c9dd6409ce689d1a08fbad7c2436
    Image:      docker.io/joethecoder2/spring-boot-web
    Image ID:       docker-pullable://joethecoder2/spring-boot-web@sha256:ebf94365075e0ee16a50cab41d8e1307785a93c60be600f94bb82a4dbefb6bc0
    Port:       
    Command:
      java
      -jar
      spring-boot-web-0.0.1-SNAPSHOT.jar
      cassandra_ip=127.0.0.1
      cassandra_port=9042
    Args:
      $(cassandra_ip)
      $(cassandra_port)
    State:      Running
      Started:      Thu, 07 Dec 2017 12:08:11 -0500
    Ready:      True
    Restart Count:  0
    Environment:
      cassandra_ip: 127.0.0.1
      cassandra_port:   9042
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-wgdn6 (ro)
Conditions:
  Type      Status
  Initialized   True 
  Ready     True 
  PodScheduled  True 
Volumes:
  default-token-wgdn6:
    Type:   Secret (a volume populated by a Secret)
    SecretName: default-token-wgdn6
    Optional:   false
QoS Class:  BestEffort
Node-Selectors: <none>
Tolerations:    <none>
Events:
  FirstSeen LastSeen    Count   From            SubObjectPath               Type        Reason          Message
  --------- --------    -----   ----            -------------               --------    ------          -------
  8m        8m      1   default-scheduler                       Normal      Scheduled       Successfully assigned spring-boot-web-demo to minikube
  8m        8m      1   kubelet, minikube                       Normal      SuccessfulMountVolume   MountVolume.SetUp succeeded for volume "default-token-wgdn6" 
  8m        8m      1   kubelet, minikube   spec.containers{spring-boot-web}    Normal      Pulling         pulling image "docker.io/joethecoder2/spring-boot-web"
  8m        8m      1   kubelet, minikube   spec.containers{spring-boot-web}    Normal      Pulled          Successfully pulled image "docker.io/joethecoder2/spring-boot-web"
  8m        8m      1   kubelet, minikube   spec.containers{spring-boot-web}    Normal      Created         Created container
  8m        8m      1   kubelet, minikube   spec.containers{spring-boot-web}    Normal      Started         Started container

I am expecting the results from the calling java program: to use the cassandra_ip and cassandra_port

The service, does not properly show the arguments being displayed by the service, and also the running java program inside docker, does not show that the arguments are called.

Command:
      java
      -jar
      spring-boot-web-0.0.1-SNAPSHOT.jar
      cassandra_ip=127.0.0.1
      cassandra_port=9042
    Args:
      $(cassandra_ip)
      $(cassandra_port)

Answer 1

change it like this. it will work.

spec:
  containers:
  - name: spring-boot-web
    image: docker.io/joethecoder2/spring-boot-web
    env:
    - name: "cassandra_ip"
      value: "127.0.0.1"
    - name: "cassandra_port"
      value: "9042"
    command: ["/bin/sh","-c", "java -jar spring-boot-web-0.0.1-SNAPSHOT.jar cassandra_ip=$cassandra_ip", "cassandra_port=$cassandra_port]
  restartPolicy: OnFailure