K8s Create Deployment with EnvFrom - kubernetes

Question

I am trying to fire up an influxdb instance on my cluster.
I am following a few different guides and am trying to get it to expose a secret as environment variables using the envFrom operator. Unfortunately I am always getting the Environment: <none> after doing my deployment. Doing an echo on the environment variables I expect yields a blank value as well.
I am running this command to deploy (the script below is in influxdb.yaml): kubectl create deployment influxdb --image=influxdb
Here is my deployment script:
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
creationTimestamp: null
generation: 1
labels:
app: influxdb
project: pihole
name: influxdb
spec:
progressDeadlineSeconds: 600
replicas: 1
revisionHistoryLimit: 10
selector:
matchLabels:
app: influxdb
strategy:
rollingUpdate:
maxSurge: 25%
maxUnavailable: 25%
type: RollingUpdate
template:
metadata:
creationTimestamp: null
labels:
app: influxdb
spec:
containers:
- name: influxdb
envFrom:
- secretRef:
name: influxdb-creds
image: docker.io/influxdb:1.7.6
imagePullPolicy: IfNotPresent
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /var/lib/influxdb
name: var-lib-influxdb
dnsPolicy: ClusterFirst
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
terminationGracePeriodSeconds: 30
volumes:
- name: var-lib-influxdb
persistentVolumeClaim:
claimName: influxdb
status: {}
The output of kubectl describe secret influxdb-creds is this:
Name: influxdb-creds
Namespace: default
Labels: <none>
Annotations: <none>
Type: Opaque
Data
====
INFLUXDB_USERNAME: 4 bytes
INFLUXDB_DATABASE: 6 bytes
INFLUXDB_HOST: 8 bytes
INFLUXDB_PASSWORD: 11 bytes

Answer 1

to test your deployment, please first create secrets and later create deployment:
1. Secrets:
kubectl create secret generic influxdb-creds --from-literal=INFLUXDB_USERNAME='test_user' --from-literal=INFLUXDB_DATABASE='test_password'
2. Deployment:
kubectl apply -f <path_to_your_yaml_file>
In order to verify, please run
kubectl describe secret influxdb-creds
kubectl exec <your_new_deployed_pod> -- env
kubectl describe pod <your_new_deployed_pod>
Take a look at:
Environment Variables from:
influxdb-creds Secret Optional: false
Hope this help.
Please share with your findings.

Answer 2

The answer to this is that I was creating the deployment incorrectly. I was using the command kubectl create deployment influxdb --image=influxdb which was creating a blank deployment and instead I should have been creating it with kubectl create -f influxdb.yaml where influxdb.yaml was my file that contained the deployment definition in the original question.
I was making the false assumption that the create deployment command read the yaml file by the same name, but it does not.